pax_global_header00006660000000000000000000000064132224452350014514gustar00rootroot0000000000000052 comment=cb38501ea2e4c642d5238684736a52f602dc3264 java-design-patterns-1.18.0/000077500000000000000000000000001322244523500156315ustar00rootroot00000000000000java-design-patterns-1.18.0/.gitignore000066400000000000000000000003321322244523500176170ustar00rootroot00000000000000target .metadata .settings .classpath .project *.class # Package Files # *.jar *.war *.ear .idea *.iml *.swp datanucleus.log /bin/ /bin/ /bin/ *.log data-mapper/src/main/resources/log4j.xml event-sourcing/Journal.json java-design-patterns-1.18.0/.travis.yml000066400000000000000000000025631322244523500177500ustar00rootroot00000000000000language: java jdk: - oraclejdk8 env: global: - GH_REF: github.com/iluwatar/java-design-patterns.git - secure: LxTDuNS/rBWIvKkaEqr79ImZAe48mCdoYCF41coxNXgNoippo4GIBArknqtv+XvdkiuRZ1yGyj6pn8GU33c/yn+krddTUkVCwTbVatbalW5jhQjDbHYym/JcxaK9ZS/3JTeGcWrBgiPqHEEDhCf26vPZsXoMSeVCEORVKTp1BSg= - secure: "eoWlW9GyTJY04P8K3pxayXwU9/hmptQg/LfirispQkV9YvmziCfSzXnatnBhNfud98sCzY8BScXnb+OWLTnjLKpId4rtEqb0aJ40Jc32cUKzgzFAUn7cNcDAbUIfyPAGVqyQqfj/11wYSADwWMMOPlW97ExUtoyiH2WenXuRHso=" before_install: - export DISPLAY=:99.0 - sh -e /etc/init.d/xvfb start # default install command is just "mvn install -DskipTests=true -Dmaven.javadoc.skip=true -B -V" install: - mvn install -DskipTests=true -Dmaven.javadoc.skip=true -B -V -e after_success: - mvn clean org.jacoco:jacoco-maven-plugin:prepare-agent package sonar:sonar -Dsonar.host.url=https://sonarqube.com -Dsonar.login=$SONAR_TOKEN - bash update-ghpages.sh # use latest java version available instead of travis default addons: apt: packages: - oracle-java8-installer notifications: email: - iluwatar@gmail.com webhooks: urls: - https://webhooks.gitter.im/e/3319623945358a093a6f on_success: change # options: [always|never|change] default: always on_failure: always # options: [always|never|change] default: always on_start: never # options: [always|never|change] default: always sudo: requiredjava-design-patterns-1.18.0/CODE_COVERAGE.md000066400000000000000000000007251322244523500201440ustar00rootroot00000000000000# Code Coverage Report generation To generate the code coverage report, execute the following command: > mvn clean verify This will generate code coverage report in each of the modules. In order to view the same, open the following file in your browser. > target/site/jacoco/index.html Please note that the above folder is created under each of the modules. For example: * adapter/target/site/jacoco/index.html * busniess-delegate/target/site/jacoco/index.html java-design-patterns-1.18.0/CONTRIBUTING.MD000066400000000000000000000003161322244523500177620ustar00rootroot00000000000000This is great you have something to contribute! Before going any further please read the [wiki](https://github.com/iluwatar/java-design-patterns/wiki) with conventions and rules we used for this project. java-design-patterns-1.18.0/LICENSE.md000066400000000000000000000020771322244523500172430ustar00rootroot00000000000000The MIT License (MIT) Copyright (c) 2014-2016 Ilkka Seppälä Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. java-design-patterns-1.18.0/PULL_REQUEST_TEMPLATE.md000066400000000000000000000005751322244523500214410ustar00rootroot00000000000000 Pull request title - Clearly and concisely describes what it does - Refer to the issue that it solves, if available Pull request description - Describes the main changes that come with the pull request - Any relevant additional information is provided > For detailed contributing instructions see https://github.com/iluwatar/java-design-patterns/wiki/01.-How-to-contribute java-design-patterns-1.18.0/README.md000066400000000000000000000052411322244523500171120ustar00rootroot00000000000000 # Design patterns implemented in Java [![Build status](https://travis-ci.org/iluwatar/java-design-patterns.svg?branch=master)](https://travis-ci.org/iluwatar/java-design-patterns) [![License MIT](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/iluwatar/java-design-patterns/master/LICENSE.md) [![Join the chat at https://gitter.im/iluwatar/java-design-patterns](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/iluwatar/java-design-patterns?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge) [![Quality Gate](https://sonarqube.com/api/badges/gate?key=com.iluwatar%3Ajava-design-patterns)](https://sonarqube.com/dashboard/index/com.iluwatar%3Ajava-design-patterns) [![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/1503/badge)](https://bestpractices.coreinfrastructure.org/projects/1503) # Introduction Design patterns are formalized best practices that the programmer can use to solve common problems when designing an application or system. Design patterns can speed up the development process by providing tested, proven development paradigms. Reusing design patterns helps to prevent subtle issues that can cause major problems, and it also improves code readability for coders and architects who are familiar with the patterns. # Getting started Before you dive into the material, you should be familiar with various Programming/Software Design Principles. All designs should be as simple as possible. You should start with KISS, YAGNI, and Do The Simplest Thing That Could Possibly Work principles. Complexity and patterns should only be introduced when they are needed for practical extensibility. Once you are familiar with these concepts you can start drilling down into patterns by any of the following approaches - Using difficulty tags, `Difficulty-Beginner`, `Difficulty-Intermediate` & `Difficulty-Expert`. - Using pattern categories, `Creational`, `Behavioral` and others. - Search for a specific pattern. Can't find one? Please report a new pattern [here](https://github.com/iluwatar/java-design-patterns/issues). # How to contribute If you are willing to contribute to the project you will find the relevant information in our [developer wiki](https://github.com/iluwatar/java-design-patterns/wiki). We will help you and answer your questions in the [Gitter chatroom](https://gitter.im/iluwatar/java-design-patterns). # License This project is licensed under the terms of the MIT license. java-design-patterns-1.18.0/abstract-document/000077500000000000000000000000001322244523500212505ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/README.md000066400000000000000000000014741322244523500225350ustar00rootroot00000000000000--- layout: pattern title: Abstract Document folder: abstract-document permalink: /patterns/abstract-document/ categories: Structural tags: - Java - Difficulty-Intermediate --- ## Intent Achieve flexibility of untyped languages and keep the type-safety ![alt text](./etc/abstract-document-base.png "Abstract Document Base") ![alt text](./etc/abstract-document.png "Abstract Document Traits and Domain") ## Applicability Use the Abstract Document Pattern when * there is a need to add new properties on the fly * you want a flexible way to organize domain in tree like structure * you want more loosely coupled system ## Credits * [Wikipedia: Abstract Document Pattern](https://en.wikipedia.org/wiki/Abstract_Document_Pattern) * [Martin Fowler: Dealing with properties](http://martinfowler.com/apsupp/properties.pdf)java-design-patterns-1.18.0/abstract-document/etc/000077500000000000000000000000001322244523500220235ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/etc/abstract-document-base.png000066400000000000000000000351751322244523500270730ustar00rootroot00000000000000PNG  IHDRx:DIDATxo}W/EM4MU\W1c! ΅: !D\7Cpn1:$6Qvb$N!/4&2xi$(&m!AO7~>gΜsWWsϜ=sf泿9s~AԜZM7 h C5)Nk?Ђf[hX09 Yvz @ $F<0,k0 5 fns v{_Mm˽v>vŕWAa7\3(ltnԚAa2"(,ѴDyݱm<^+e僠 kkc~$J_2ehZϵaFS=0+ =d[2vߋdvbi ʞe ".xa`;CY2Mhε܈x9צɞ;Q_bأqqDˎ m6 kzz%I3d]2 h5E̹6 &%0|O(Gm;#OSu!i\b ^%l)lwv8VvTWKmQX^+9Lc}WIP}s OSd3}߉#;\F/oZ1/O Ѵkx9|0\Aa7\CSAalP؍p0l6(F8`P6v#k0( 5<[>uom%ɒ[5(s 3D [n;#3y}卷m Qxb +|'_e?"Yyhױ]zGM(s  brd|m'qB9Ӌ(Y}f tuB#<1*LPڇ䳇Wm݉c?}չgJݖO 2ƿ|e=gxsn̹V2IO2n _Uݭ(ٴ_ß,|9t=)Ʉ lʨ0{Aa7 \+($MgQg"6:b#ˊgKx??z%;nbҥ~ntʬ@XCԡ}-3n̹V*ֱRxX'n&(L_t=d~}/{6?v蓧m}[FCA `(sT3dDbHI7&Anڻ'[_o<.;uݥe\X- Q0ZXG;'O \vO/|to6F[a/X@kbˉ3ZI7&^zKno|b]_}vK^жe\b!_wԑ Q0ZXCcNY w^~UC_, '(sLc#H}*&޴-Z=<[i5(FkulQݠw!)kP6v#k0( 5 fns aAa7¹OḓLґc8& 9wS[:QF°XxL w&qeU;uv#DK iyZg{N s9P-GY]dq{zZ^B(ic :gTޥm}?>Ȁ"X(zQBғ,L<>bJaC:Qp6Jf]fsO.f,O["m@B}ZVL[]dVG>JWHki6vo#ԍփ0nY#Ox r4K$G(z8J6CN-W.bGc^F< 7]\.5[pq?] ;T "09ۋ;FpUfEɞ#ߓٌ|R;_②mJak&ZZ:j֛6!A3 F$sSg"|5BeTrGoZp$d.xU\&JR֒ tmio ʰ$;!A34(Fx°٠\AalP؍p0l6(F8`P6v#k0( 5LU.hA-r 4S y F ;"Hx@a ;5X6v#k0( 5LaUA;F-PxB, B,Dx ܝnNs n!<9\'q:?/6=pU'\w!/*nA&v#D<0( 5 %Ht7/0(F0<&OݨE;O6}]v"r_rI!)8Ny.ռpl40J5mhHp>"AK#wqM)3(FE<ѿp'/MhN5zq QOf=S)0`֭o ] TP> LgϞ%'tC)ҙ3g3@a/f {Ǐ[5/ 8¾ ?ˇ{=~6(6o޼t+ :|ݎ@[l$J &P{֭і-[9t+ Ey|6:H{D]V^V! 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jI:A]PsNw s#NwtԜ!t5$pG .9'1aw>tfC (Sj$cl:1).[ҕk N%o܇󐯬ڑ*ix6&ȦwtԜwcF6Ly6'5 U,&#upǩaw8hc Nl qGwA9w|g?xS}̋ȂU{'&|qigCWԚJEjiqy5$~ͣ_~0)+ɲٝ0!"*} 3^la$5Bt.M3 V>@'qhݱ2C儨6${~ z?kq/T[tS>JhorXK1wtJ-Z{;fHD^]eVMTUceLXlZs  jIT㡳ͧ9y>}R^_dMI;ѕܱ|WP,66iﬖctYeRsg{ѻ9;F:8z5S=o5oTY-N๣l=UXEsjITM#~O] ?5ɲ;K'a:wbXj)SruN'5Q>{zU< ^6 )'-sPVSՒ(ڨz+'":oqGW0ʉPs, ^-lh=XmÈ; jIԸsE_tBkx$_tLSB'ayPQGow; jIԻ]ˤu[ 9#wy:ah匴)?es.#-$.9';BqGwA9 B'; jI:A]PsNw s{r`L@#PH$n"IENDB`java-design-patterns-1.18.0/abstract-document/etc/abstract-document.ucls000066400000000000000000000134471322244523500263430ustar00rootroot00000000000000 java-design-patterns-1.18.0/abstract-document/pom.xml000066400000000000000000000040171322244523500225670ustar00rootroot00000000000000 4.0.0 java-design-patterns com.iluwatar 1.18.0 abstract-document org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/abstract-document/src/000077500000000000000000000000001322244523500220375ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/main/000077500000000000000000000000001322244523500227635ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/main/java/000077500000000000000000000000001322244523500237045ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/main/java/com/000077500000000000000000000000001322244523500244625ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500263125ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/main/java/com/iluwatar/abstractdocument/000077500000000000000000000000001322244523500316545ustar00rootroot00000000000000AbstractDocument.java000066400000000000000000000050331322244523500357030ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/main/java/com/iluwatar/abstractdocument/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractdocument; import java.util.List; import java.util.Map; import java.util.Objects; import java.util.Optional; import java.util.function.Function; import java.util.stream.Stream; /** * Abstract implementation of Document interface */ public abstract class AbstractDocument implements Document { private final Map properties; protected AbstractDocument(Map properties) { Objects.requireNonNull(properties, "properties map is required"); this.properties = properties; } @Override public Void put(String key, Object value) { properties.put(key, value); return null; } @Override public Object get(String key) { return properties.get(key); } @Override public Stream children(String key, Function, T> constructor) { Optional>> any = Stream.of(get(key)).filter(el -> el != null) .map(el -> (List>) el).findAny(); return any.isPresent() ? any.get().stream().map(constructor) : Stream.empty(); } @Override public String toString() { StringBuilder builder = new StringBuilder(); builder.append(getClass().getName()).append("["); properties.entrySet() .forEach(e -> builder.append("[").append(e.getKey()).append(" : ").append(e.getValue()).append("]")); builder.append("]"); return builder.toString(); } } java-design-patterns-1.18.0/abstract-document/src/main/java/com/iluwatar/abstractdocument/App.java000066400000000000000000000064541322244523500332500ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractdocument; import com.iluwatar.abstractdocument.domain.Car; import com.iluwatar.abstractdocument.domain.HasModel; import com.iluwatar.abstractdocument.domain.HasParts; import com.iluwatar.abstractdocument.domain.HasPrice; import com.iluwatar.abstractdocument.domain.HasType; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.Arrays; import java.util.HashMap; import java.util.Map; /** * The Abstract Document pattern enables handling additional, non-static * properties. This pattern uses concept of traits to enable type safety and * separate properties of different classes into set of interfaces. *

*

* In Abstract Document pattern,({@link AbstractDocument}) fully implements * {@link Document}) interface. Traits are then defined to enable access to * properties in usual, static way. */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Executes the App */ public App() { LOGGER.info("Constructing parts and car"); Map carProperties = new HashMap<>(); carProperties.put(HasModel.PROPERTY, "300SL"); carProperties.put(HasPrice.PROPERTY, 10000L); Map wheelProperties = new HashMap<>(); wheelProperties.put(HasType.PROPERTY, "wheel"); wheelProperties.put(HasModel.PROPERTY, "15C"); wheelProperties.put(HasPrice.PROPERTY, 100L); Map doorProperties = new HashMap<>(); doorProperties.put(HasType.PROPERTY, "door"); doorProperties.put(HasModel.PROPERTY, "Lambo"); doorProperties.put(HasPrice.PROPERTY, 300L); carProperties.put(HasParts.PROPERTY, Arrays.asList(wheelProperties, doorProperties)); Car car = new Car(carProperties); LOGGER.info("Here is our car:"); LOGGER.info("-> model: {}", car.getModel().get()); LOGGER.info("-> price: {}", car.getPrice().get()); LOGGER.info("-> parts: "); car.getParts().forEach(p -> LOGGER.info("\t{}/{}/{}", p.getType().get(), p.getModel().get(), p.getPrice().get())); } /** * Program entry point * * @param args command line args */ public static void main(String[] args) { new App(); } } Document.java000066400000000000000000000035701322244523500342230ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/main/java/com/iluwatar/abstractdocument/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractdocument; import java.util.Map; import java.util.function.Function; import java.util.stream.Stream; /** * Document interface */ public interface Document { /** * Puts the value related to the key * * @param key element key * @param value element value * @return Void */ Void put(String key, Object value); /** * Gets the value for the key * * @param key element key * @return value or null */ Object get(String key); /** * Gets the stream of child documents * * @param key element key * @param constructor constructor of child class * @return child documents */ Stream children(String key, Function, T> constructor); } java-design-patterns-1.18.0/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/000077500000000000000000000000001322244523500331235ustar00rootroot00000000000000Car.java000066400000000000000000000026731322244523500344240ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractdocument.domain; import java.util.Map; import com.iluwatar.abstractdocument.AbstractDocument; /** * Car entity */ public class Car extends AbstractDocument implements HasModel, HasPrice, HasParts { public Car(Map properties) { super(properties); } } HasModel.java000066400000000000000000000027631322244523500354130ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractdocument.domain; import java.util.Optional; import com.iluwatar.abstractdocument.Document; /** * HasModel trait for static access to 'model' property */ public interface HasModel extends Document { String PROPERTY = "model"; default Optional getModel() { return Optional.ofNullable((String) get(PROPERTY)); } } HasParts.java000066400000000000000000000027461322244523500354450ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractdocument.domain; import java.util.stream.Stream; import com.iluwatar.abstractdocument.Document; /** * HasParts trait for static access to 'parts' property */ public interface HasParts extends Document { String PROPERTY = "parts"; default Stream getParts() { return children(PROPERTY, Part::new); } } HasPrice.java000066400000000000000000000027631322244523500354150ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractdocument.domain; import java.util.Optional; import com.iluwatar.abstractdocument.Document; /** * HasPrice trait for static access to 'price' property */ public interface HasPrice extends Document { String PROPERTY = "price"; default Optional getPrice() { return Optional.ofNullable((Number) get(PROPERTY)); } } HasType.java000066400000000000000000000027561322244523500352760ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractdocument.domain; import com.iluwatar.abstractdocument.Document; import java.util.Optional; /** * HasType trait for static access to 'type' property */ public interface HasType extends Document { String PROPERTY = "type"; default Optional getType() { return Optional.ofNullable((String) get(PROPERTY)); } } Part.java000066400000000000000000000026751322244523500346270ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractdocument.domain; import java.util.Map; import com.iluwatar.abstractdocument.AbstractDocument; /** * Part entity */ public class Part extends AbstractDocument implements HasType, HasModel, HasPrice { public Part(Map properties) { super(properties); } } java-design-patterns-1.18.0/abstract-document/src/test/000077500000000000000000000000001322244523500230165ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/test/java/000077500000000000000000000000001322244523500237375ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/test/java/com/000077500000000000000000000000001322244523500245155ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500263455ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/test/java/com/iluwatar/abstractdocument/000077500000000000000000000000001322244523500317075ustar00rootroot00000000000000AbstractDocumentTest.java000066400000000000000000000057401322244523500366030ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/test/java/com/iluwatar/abstractdocument/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractdocument; import org.junit.jupiter.api.Test; import java.util.Arrays; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.stream.Stream; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; /** * AbstractDocument test class */ public class AbstractDocumentTest { private static final String KEY = "key"; private static final String VALUE = "value"; private class DocumentImplementation extends AbstractDocument { DocumentImplementation(Map properties) { super(properties); } } private DocumentImplementation document = new DocumentImplementation(new HashMap<>()); @Test public void shouldPutAndGetValue() { document.put(KEY, VALUE); assertEquals(VALUE, document.get(KEY)); } @Test public void shouldRetrieveChildren() { Map child1 = new HashMap<>(); Map child2 = new HashMap<>(); List> children = Arrays.asList(child1, child2); document.put(KEY, children); Stream childrenStream = document.children(KEY, DocumentImplementation::new); assertNotNull(children); assertEquals(2, childrenStream.count()); } @Test public void shouldRetrieveEmptyStreamForNonExistingChildren() { Stream children = document.children(KEY, DocumentImplementation::new); assertNotNull(children); assertEquals(0, children.count()); } @Test public void shouldIncludePropsInToString() { Map props = new HashMap<>(); props.put(KEY, VALUE); DocumentImplementation document = new DocumentImplementation(props); assertNotNull(document.toString().contains(KEY)); assertNotNull(document.toString().contains(VALUE)); } } AppTest.java000066400000000000000000000025321322244523500340550ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/test/java/com/iluwatar/abstractdocument/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractdocument; import org.junit.jupiter.api.Test; /** * Simple App test */ public class AppTest { @Test public void shouldExecuteAppWithoutException() { App.main(null); } } DomainTest.java000066400000000000000000000057571322244523500345600ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-document/src/test/java/com/iluwatar/abstractdocument/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractdocument; import com.iluwatar.abstractdocument.domain.Car; import com.iluwatar.abstractdocument.domain.HasModel; import com.iluwatar.abstractdocument.domain.HasParts; import com.iluwatar.abstractdocument.domain.HasPrice; import com.iluwatar.abstractdocument.domain.HasType; import com.iluwatar.abstractdocument.domain.Part; import org.junit.jupiter.api.Test; import java.util.Arrays; import java.util.HashMap; import java.util.Map; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Test for Part and Car */ public class DomainTest { private static final String TEST_PART_TYPE = "test-part-type"; private static final String TEST_PART_MODEL = "test-part-model"; private static final long TEST_PART_PRICE = 0L; private static final String TEST_CAR_MODEL = "test-car-model"; private static final long TEST_CAR_PRICE = 1L; @Test public void shouldConstructPart() { Map partProperties = new HashMap<>(); partProperties.put(HasType.PROPERTY, TEST_PART_TYPE); partProperties.put(HasModel.PROPERTY, TEST_PART_MODEL); partProperties.put(HasPrice.PROPERTY, TEST_PART_PRICE); Part part = new Part(partProperties); assertEquals(TEST_PART_TYPE, part.getType().get()); assertEquals(TEST_PART_MODEL, part.getModel().get()); assertEquals(TEST_PART_PRICE, part.getPrice().get()); } @Test public void shouldConstructCar() { Map carProperties = new HashMap<>(); carProperties.put(HasModel.PROPERTY, TEST_CAR_MODEL); carProperties.put(HasPrice.PROPERTY, TEST_CAR_PRICE); carProperties.put(HasParts.PROPERTY, Arrays.asList(new HashMap<>(), new HashMap<>())); Car car = new Car(carProperties); assertEquals(TEST_CAR_MODEL, car.getModel().get()); assertEquals(TEST_CAR_PRICE, car.getPrice().get()); assertEquals(2, car.getParts().count()); } } java-design-patterns-1.18.0/abstract-factory/000077500000000000000000000000001322244523500211015ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-factory/.gitignore000066400000000000000000000000111322244523500230610ustar00rootroot00000000000000/target/ java-design-patterns-1.18.0/abstract-factory/README.md000066400000000000000000000140321322244523500223600ustar00rootroot00000000000000--- layout: pattern title: Abstract Factory folder: abstract-factory permalink: /patterns/abstract-factory/ categories: Creational tags: - Java - Gang Of Four - Difficulty-Intermediate --- ## Also known as Kit ## Intent Provide an interface for creating families of related or dependent objects without specifying their concrete classes. ## Explanation Real world example > To create a kingdom we need objects with common theme. Elven kingdom needs an Elven king, Elven castle and Elven army whereas Orcish kingdom needs an Orcish king, Orcish castle and Orcish army. There is a dependency between the objects in the kingdom. In plain words > A factory of factories; a factory that groups the individual but related/dependent factories together without specifying their concrete classes. Wikipedia says > The abstract factory pattern provides a way to encapsulate a group of individual factories that have a common theme without specifying their concrete classes **Programmatic Example** Translating the kingdom example above. First of all we have some interfaces and implementation for the objects in the kingdom ``` public interface Castle { String getDescription(); } public interface King { String getDescription(); } public interface Army { String getDescription(); } // Elven implementations -> public class ElfCastle implements Castle { static final String DESCRIPTION = "This is the Elven castle!"; @Override public String getDescription() { return DESCRIPTION; } } public class ElfKing implements King { static final String DESCRIPTION = "This is the Elven king!"; @Override public String getDescription() { return DESCRIPTION; } } public class ElfArmy implements Army { static final String DESCRIPTION = "This is the Elven Army!"; @Override public String getDescription() { return DESCRIPTION; } } // Orcish implementations similarly... ``` Then we have the abstraction and implementations for the kingdom factory ``` public interface KingdomFactory { Castle createCastle(); King createKing(); Army createArmy(); } public class ElfKingdomFactory implements KingdomFactory { public Castle createCastle() { return new ElfCastle(); } public King createKing() { return new ElfKing(); } public Army createArmy() { return new ElfArmy(); } } public class OrcKingdomFactory implements KingdomFactory { public Castle createCastle() { return new OrcCastle(); } public King createKing() { return new OrcKing(); } public Army createArmy() { return new OrcArmy(); } } ``` Now we have our abstract factory that lets us make family of related objects i.e. Elven kingdom factory creates Elven castle, king and army etc. ``` KingdomFactory factory = new ElfKingdomFactory(); Castle castle = factory.createCastle(); King king = factory.createKing(); Army army = factory.createArmy(); castle.getDescription(); // Output: This is the Elven castle! king.getDescription(); // Output: This is the Elven king! army.getDescription(); // Output: This is the Elven Army! ``` Now, we can design a factory for our different kingdom factories. In this example, we created FactoryMaker, responsible for returning an instance of either ElfKingdomFactory or OrcKingdomFactory. The client can use FactoryMaker to create the desired concrete factory which, in turn, will produce different concrete objects (Army, King, Castle). In this example, we also used an enum to parameterize which type of kingdom factory the client will ask for. ``` public static class FactoryMaker { public enum KingdomType { ELF, ORC } public static KingdomFactory makeFactory(KingdomType type) { switch (type) { case ELF: return new ElfKingdomFactory(); case ORC: return new OrcKingdomFactory(); default: throw new IllegalArgumentException("KingdomType not supported."); } } } public static void main(String[] args) { App app = new App(); LOGGER.info("Elf Kingdom"); app.createKingdom(FactoryMaker.makeFactory(KingdomType.ELF)); LOGGER.info(app.getArmy().getDescription()); LOGGER.info(app.getCastle().getDescription()); LOGGER.info(app.getKing().getDescription()); LOGGER.info("Orc Kingdom"); app.createKingdom(FactoryMaker.makeFactory(KingdomType.ORC)); -- similar use of the orc factory } ``` ## Applicability Use the Abstract Factory pattern when * a system should be independent of how its products are created, composed and represented * a system should be configured with one of multiple families of products * a family of related product objects is designed to be used together, and you need to enforce this constraint * you want to provide a class library of products, and you want to reveal just their interfaces, not their implementations * the lifetime of the dependency is conceptually shorter than the lifetime of the consumer. * you need a run-time value to construct a particular dependency * you want to decide which product to call from a family at runtime. * you need to supply one or more parameters only known at run-time before you can resolve a dependency. ## Use Cases: * Selecting to call the appropriate implementation of FileSystemAcmeService or DatabaseAcmeService or NetworkAcmeService at runtime. * Unit test case writing becomes much easier ## Consequences: * Dependency injection in java hides the service class dependencies that can lead to runtime errors that would have been caught at compile time. ## Presentations * [Abstract Factory Pattern](etc/presentation.html) ## Real world examples * [javax.xml.parsers.DocumentBuilderFactory](http://docs.oracle.com/javase/8/docs/api/javax/xml/parsers/DocumentBuilderFactory.html) * [javax.xml.transform.TransformerFactory](http://docs.oracle.com/javase/8/docs/api/javax/xml/transform/TransformerFactory.html#newInstance--) * [javax.xml.xpath.XPathFactory](http://docs.oracle.com/javase/8/docs/api/javax/xml/xpath/XPathFactory.html#newInstance--) ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.18.0/abstract-factory/etc/000077500000000000000000000000001322244523500216545ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-factory/etc/diagram1.png000066400000000000000000001612421322244523500240550ustar00rootroot00000000000000PNG  IHDRVCOsRGBgAMA a pHYs+7IDATx^ ՝zFFB4^D!|C2x٬QL$*~$hG`t&d!IĈ 0eNsNn~=}::]]OUǚx rT[[W&X0! 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractfactory; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.iluwatar.abstractfactory.App.FactoryMaker.KingdomType; /** * * The Abstract Factory pattern provides a way to encapsulate a group of individual factories that have a common theme * without specifying their concrete classes. In normal usage, the client software creates a concrete implementation of * the abstract factory and then uses the generic interface of the factory to create the concrete objects that are part * of the theme. The client does not know (or care) which concrete objects it gets from each of these internal * factories, since it uses only the generic interfaces of their products. This pattern separates the details of * implementation of a set of objects from their general usage and relies on object composition, as object creation is * implemented in methods exposed in the factory interface. *

* The essence of the Abstract Factory pattern is a factory interface ({@link KingdomFactory}) and its implementations ( * {@link ElfKingdomFactory}, {@link OrcKingdomFactory}). The example uses both concrete implementations to create a * king, a castle and an army. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); private King king; private Castle castle; private Army army; /** * Creates kingdom */ public void createKingdom(final KingdomFactory factory) { setKing(factory.createKing()); setCastle(factory.createCastle()); setArmy(factory.createArmy()); } King getKing(final KingdomFactory factory) { return factory.createKing(); } public King getKing() { return king; } private void setKing(final King king) { this.king = king; } Castle getCastle(final KingdomFactory factory) { return factory.createCastle(); } public Castle getCastle() { return castle; } private void setCastle(final Castle castle) { this.castle = castle; } Army getArmy(final KingdomFactory factory) { return factory.createArmy(); } public Army getArmy() { return army; } private void setArmy(final Army army) { this.army = army; } /** * The factory of kingdom factories. */ public static class FactoryMaker { /** * Enumeration for the different types of Kingdoms. */ public enum KingdomType { ELF, ORC } /** * The factory method to create KingdomFactory concrete objects. */ public static KingdomFactory makeFactory(KingdomType type) { switch (type) { case ELF: return new ElfKingdomFactory(); case ORC: return new OrcKingdomFactory(); default: throw new IllegalArgumentException("KingdomType not supported."); } } } /** * Program entry point. * * @param args * command line args */ public static void main(String[] args) { App app = new App(); LOGGER.info("Elf Kingdom"); app.createKingdom(FactoryMaker.makeFactory(KingdomType.ELF)); LOGGER.info(app.getArmy().getDescription()); LOGGER.info(app.getCastle().getDescription()); LOGGER.info(app.getKing().getDescription()); LOGGER.info("Orc Kingdom"); app.createKingdom(FactoryMaker.makeFactory(KingdomType.ORC)); LOGGER.info(app.getArmy().getDescription()); LOGGER.info(app.getCastle().getDescription()); LOGGER.info(app.getKing().getDescription()); } }java-design-patterns-1.18.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/Army.java000066400000000000000000000023671322244523500331210ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractfactory; /** * * Army interface * */ public interface Army { String getDescription(); } java-design-patterns-1.18.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/Castle.java000066400000000000000000000023731322244523500334210ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractfactory; /** * * Castle interface * */ public interface Castle { String getDescription(); } java-design-patterns-1.18.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/ElfArmy.java000066400000000000000000000025571322244523500335510ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractfactory; /** * * ElfArmy * */ public class ElfArmy implements Army { static final String DESCRIPTION = "This is the Elven Army!"; @Override public String getDescription() { return DESCRIPTION; } } ElfCastle.java000066400000000000000000000025671322244523500337760ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractfactory; /** * * ElfCastle * */ public class ElfCastle implements Castle { static final String DESCRIPTION = "This is the Elven castle!"; @Override public String getDescription() { return DESCRIPTION; } } java-design-patterns-1.18.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/ElfKing.java000066400000000000000000000025571322244523500335310ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractfactory; /** * * ElfKing * */ public class ElfKing implements King { static final String DESCRIPTION = "This is the Elven king!"; @Override public String getDescription() { return DESCRIPTION; } } ElfKingdomFactory.java000066400000000000000000000027171322244523500355000ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractfactory; /** * * ElfKingdomFactory concrete factory. * */ public class ElfKingdomFactory implements KingdomFactory { public Castle createCastle() { return new ElfCastle(); } public King createKing() { return new ElfKing(); } public Army createArmy() { return new ElfArmy(); } } java-design-patterns-1.18.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/King.java000066400000000000000000000023671322244523500331010ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractfactory; /** * * King interface * */ public interface King { String getDescription(); } KingdomFactory.java000066400000000000000000000025001322244523500350370ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractfactory; /** * * KingdomFactory factory interface. * */ public interface KingdomFactory { Castle createCastle(); King createKing(); Army createArmy(); } java-design-patterns-1.18.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/OrcArmy.java000066400000000000000000000025551322244523500335640ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractfactory; /** * * OrcArmy * */ public class OrcArmy implements Army { static final String DESCRIPTION = "This is the Orc Army!"; @Override public String getDescription() { return DESCRIPTION; } } OrcCastle.java000066400000000000000000000025651322244523500340110ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractfactory; /** * * OrcCastle * */ public class OrcCastle implements Castle { static final String DESCRIPTION = "This is the Orc castle!"; @Override public String getDescription() { return DESCRIPTION; } } java-design-patterns-1.18.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/OrcKing.java000066400000000000000000000025551322244523500335440ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractfactory; /** * * OrcKing * */ public class OrcKing implements King { static final String DESCRIPTION = "This is the Orc king!"; @Override public String getDescription() { return DESCRIPTION; } } OrcKingdomFactory.java000066400000000000000000000027161322244523500355140ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractfactory; /** * * OrcKingdomFactory concrete factory. * */ public class OrcKingdomFactory implements KingdomFactory { public Castle createCastle() { return new OrcCastle(); } public King createKing() { return new OrcKing(); } public Army createArmy() { return new OrcArmy(); } } java-design-patterns-1.18.0/abstract-factory/src/test/000077500000000000000000000000001322244523500226475ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-factory/src/test/java/000077500000000000000000000000001322244523500235705ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-factory/src/test/java/com/000077500000000000000000000000001322244523500243465ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-factory/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500261765ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-factory/src/test/java/com/iluwatar/abstractfactory/000077500000000000000000000000001322244523500313715ustar00rootroot00000000000000AbstractFactoryTest.java000066400000000000000000000076041322244523500361170ustar00rootroot00000000000000java-design-patterns-1.18.0/abstract-factory/src/test/java/com/iluwatar/abstractfactory/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractfactory; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertTrue; import com.iluwatar.abstractfactory.App.FactoryMaker; import com.iluwatar.abstractfactory.App.FactoryMaker.KingdomType; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; /** * Test for abstract factory */ public class AbstractFactoryTest { private App app = new App(); private KingdomFactory elfFactory; private KingdomFactory orcFactory; @BeforeEach public void setUp() { elfFactory = FactoryMaker.makeFactory(KingdomType.ELF); orcFactory = FactoryMaker.makeFactory(KingdomType.ORC); } @Test public void king() { final King elfKing = app.getKing(elfFactory); assertTrue(elfKing instanceof ElfKing); assertEquals(ElfKing.DESCRIPTION, elfKing.getDescription()); final King orcKing = app.getKing(orcFactory); assertTrue(orcKing instanceof OrcKing); assertEquals(OrcKing.DESCRIPTION, orcKing.getDescription()); } @Test public void castle() { final Castle elfCastle = app.getCastle(elfFactory); assertTrue(elfCastle instanceof ElfCastle); assertEquals(ElfCastle.DESCRIPTION, elfCastle.getDescription()); final Castle orcCastle = app.getCastle(orcFactory); assertTrue(orcCastle instanceof OrcCastle); assertEquals(OrcCastle.DESCRIPTION, orcCastle.getDescription()); } @Test public void army() { final Army elfArmy = app.getArmy(elfFactory); assertTrue(elfArmy instanceof ElfArmy); assertEquals(ElfArmy.DESCRIPTION, elfArmy.getDescription()); final Army orcArmy = app.getArmy(orcFactory); assertTrue(orcArmy instanceof OrcArmy); assertEquals(OrcArmy.DESCRIPTION, orcArmy.getDescription()); } @Test public void createElfKingdom() { app.createKingdom(elfFactory); final King king = app.getKing(); final Castle castle = app.getCastle(); final Army army = app.getArmy(); assertTrue(king instanceof ElfKing); assertEquals(ElfKing.DESCRIPTION, king.getDescription()); assertTrue(castle instanceof ElfCastle); assertEquals(ElfCastle.DESCRIPTION, castle.getDescription()); assertTrue(army instanceof ElfArmy); assertEquals(ElfArmy.DESCRIPTION, army.getDescription()); } @Test public void createOrcKingdom() { app.createKingdom(orcFactory); final King king = app.getKing(); final Castle castle = app.getCastle(); final Army army = app.getArmy(); assertTrue(king instanceof OrcKing); assertEquals(OrcKing.DESCRIPTION, king.getDescription()); assertTrue(castle instanceof OrcCastle); assertEquals(OrcCastle.DESCRIPTION, castle.getDescription()); assertTrue(army instanceof OrcArmy); assertEquals(OrcArmy.DESCRIPTION, army.getDescription()); } } java-design-patterns-1.18.0/abstract-factory/src/test/java/com/iluwatar/abstractfactory/AppTest.java000066400000000000000000000026401322244523500336160ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.abstractfactory; import org.junit.jupiter.api.Test; import java.io.IOException; /** * Tests that Abstract Factory example runs without errors. */ public class AppTest { @Test public void test() throws IOException { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/adapter/000077500000000000000000000000001322244523500172515ustar00rootroot00000000000000java-design-patterns-1.18.0/adapter/README.md000066400000000000000000000122241322244523500205310ustar00rootroot00000000000000--- layout: pattern title: Adapter folder: adapter permalink: /patterns/adapter/ categories: Structural tags: - Java - Gang Of Four - Difficulty-Beginner --- ## Also known as Wrapper ## Intent Convert the interface of a class into another interface the clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces. ## Explanation Real world example > Consider that you have some pictures in your memory card and you need to transfer them to your computer. In order to transfer them you need some kind of adapter that is compatible with your computer ports so that you can attach memory card to your computer. In this case card reader is an adapter. > Another example would be the famous power adapter; a three legged plug can't be connected to a two pronged outlet, it needs to use a power adapter that makes it compatible with the two pronged outlet. > Yet another example would be a translator translating words spoken by one person to another In plain words > Adapter pattern lets you wrap an otherwise incompatible object in an adapter to make it compatible with another class. Wikipedia says > In software engineering, the adapter pattern is a software design pattern that allows the interface of an existing class to be used as another interface. It is often used to make existing classes work with others without modifying their source code. **Programmatic Example** Consider a captain that can only use rowing boats and cannot sail at all. First we have interfaces `RowingBoat` and `FishingBoat` ``` public interface RowingBoat { void row(); } public class FishingBoat { private static final Logger LOGGER = LoggerFactory.getLogger(FishingBoat.class); public void sail() { LOGGER.info("The fishing boat is sailing"); } } ``` And captain expects an implementation of `RowingBoat` interface to be able to move ``` public class Captain implements RowingBoat { private RowingBoat rowingBoat; public Captain(RowingBoat rowingBoat) { this.rowingBoat = rowingBoat; } @Override public void row() { rowingBoat.row(); } } ``` Now let's say the pirates are coming and our captain needs to escape but there is only fishing boat available. We need to create an adapter that allows the captain to operate the fishing boat with his rowing boat skills. ``` public class FishingBoatAdapter implements RowingBoat { private static final Logger LOGGER = LoggerFactory.getLogger(FishingBoatAdapter.class); private FishingBoat boat; public FishingBoatAdapter() { boat = new FishingBoat(); } @Override public void row() { boat.sail(); } } ``` And now the `Captain` can use the `FishingBoat` to escape the pirates. ``` Captain captain = new Captain(new FishingBoatAdapter()); captain.row(); ``` ## Applicability Use the Adapter pattern when * you want to use an existing class, and its interface does not match the one you need * you want to create a reusable class that cooperates with unrelated or unforeseen classes, that is, classes that don't necessarily have compatible interfaces * you need to use several existing subclasses, but it's impractical to adapt their interface by subclassing every one. An object adapter can adapt the interface of its parent class. * most of the applications using third party libraries use adapters as a middle layer between the application and the 3rd party library to decouple the application from the library. If another library has to be used only an adapter for the new library is required without having to change the application code. ## Consequences: Class and object adapters have different trade-offs. A class adapter * adapts Adaptee to Target by committing to a concrete Adaptee class. As a consequence, a class adapter won’t work when we want to adapt a class and all its subclasses. * let’s Adapter override some of Adaptee’s behavior, since Adapter is a subclass of Adaptee. * introduces only one object, and no additional pointer indirection is needed to get to the adaptee. An object adapter * let’s a single Adapter work with many Adaptees—that is, the Adaptee itself and all of its subclasses (if any). The Adapter can also add functionality to all Adaptees at once. * makes it harder to override Adaptee behavior. It will require subclassing Adaptee and making Adapter refer to the subclass rather than the Adaptee itself. ## Real world examples * [java.util.Arrays#asList()](http://docs.oracle.com/javase/8/docs/api/java/util/Arrays.html#asList%28T...%29) * [java.util.Collections#list()](https://docs.oracle.com/javase/8/docs/api/java/util/Collections.html#list-java.util.Enumeration-) * [java.util.Collections#enumeration()](https://docs.oracle.com/javase/8/docs/api/java/util/Collections.html#enumeration-java.util.Collection-) * [javax.xml.bind.annotation.adapters.XMLAdapter](http://docs.oracle.com/javase/8/docs/api/javax/xml/bind/annotation/adapters/XmlAdapter.html#marshal-BoundType-) ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) * [J2EE Design Patterns](http://www.amazon.com/J2EE-Design-Patterns-William-Crawford/dp/0596004273/ref=sr_1_2) java-design-patterns-1.18.0/adapter/pom.xml000066400000000000000000000040621322244523500205700ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 adapter org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.mockito mockito-core test java-design-patterns-1.18.0/adapter/src/000077500000000000000000000000001322244523500200405ustar00rootroot00000000000000java-design-patterns-1.18.0/adapter/src/main/000077500000000000000000000000001322244523500207645ustar00rootroot00000000000000java-design-patterns-1.18.0/adapter/src/main/java/000077500000000000000000000000001322244523500217055ustar00rootroot00000000000000java-design-patterns-1.18.0/adapter/src/main/java/com/000077500000000000000000000000001322244523500224635ustar00rootroot00000000000000java-design-patterns-1.18.0/adapter/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500243135ustar00rootroot00000000000000java-design-patterns-1.18.0/adapter/src/main/java/com/iluwatar/adapter/000077500000000000000000000000001322244523500257335ustar00rootroot00000000000000java-design-patterns-1.18.0/adapter/src/main/java/com/iluwatar/adapter/App.java000066400000000000000000000052771322244523500273310ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.adapter; /** * An adapter helps two incompatible interfaces to work together. This is the real world definition * for an adapter. Interfaces may be incompatible but the inner functionality should suit the need. * The Adapter design pattern allows otherwise incompatible classes to work together by converting * the interface of one class into an interface expected by the clients. * *

* There are two variations of the Adapter pattern: The class adapter implements the adaptee's * interface whereas the object adapter uses composition to contain the adaptee in the adapter * object. This example uses the object adapter approach. * *

* The Adapter ({@link FishingBoatAdapter}) converts the interface of the adaptee class ( * {@link FishingBoat}) into a suitable one expected by the client ( {@link RowingBoat} ). * *

* The story of this implementation is this.
* Pirates are coming! we need a {@link RowingBoat} to flee! We have a {@link FishingBoat} and our * captain. We have no time to make up a new ship! we need to reuse this {@link FishingBoat}. The * captain needs a rowing boat which he can operate. The spec is in {@link RowingBoat}. We will * use the Adapter pattern to reuse {@link FishingBoat}. * */ public class App { /** * Program entry point. * * @param args command line args */ public static void main(String[] args) { // The captain can only operate rowing boats but with adapter he is able to use fishing boats as well Captain captain = new Captain(new FishingBoatAdapter()); captain.row(); } } java-design-patterns-1.18.0/adapter/src/main/java/com/iluwatar/adapter/Captain.java000066400000000000000000000031161322244523500301560ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.adapter; /** * The Captain uses {@link RowingBoat} to sail.
* This is the client in the pattern. */ public class Captain implements RowingBoat { private RowingBoat rowingBoat; public Captain() {} public Captain(RowingBoat rowingBoat) { this.rowingBoat = rowingBoat; } public void setRowingBoat(RowingBoat rowingBoat) { this.rowingBoat = rowingBoat; } @Override public void row() { rowingBoat.row(); } } java-design-patterns-1.18.0/adapter/src/main/java/com/iluwatar/adapter/FishingBoat.java000066400000000000000000000030071322244523500307730ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.adapter; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Device class (adaptee in the pattern). We want to reuse this class. * Fishing boat moves by sailing. * */ public class FishingBoat { private static final Logger LOGGER = LoggerFactory.getLogger(FishingBoat.class); public void sail() { LOGGER.info("The fishing boat is sailing"); } } java-design-patterns-1.18.0/adapter/src/main/java/com/iluwatar/adapter/FishingBoatAdapter.java000066400000000000000000000030221322244523500322710ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.adapter; /** * * Adapter class. Adapts the interface of the device ({@link FishingBoat}) into {@link RowingBoat} * interface expected by the client ({@link Captain}). * */ public class FishingBoatAdapter implements RowingBoat { private FishingBoat boat; public FishingBoatAdapter() { boat = new FishingBoat(); } @Override public void row() { boat.sail(); } } java-design-patterns-1.18.0/adapter/src/main/java/com/iluwatar/adapter/RowingBoat.java000066400000000000000000000024431322244523500306540ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.adapter; /** * The interface expected by the client.
* A rowing boat is rowed to move. * */ public interface RowingBoat { void row(); } java-design-patterns-1.18.0/adapter/src/test/000077500000000000000000000000001322244523500210175ustar00rootroot00000000000000java-design-patterns-1.18.0/adapter/src/test/java/000077500000000000000000000000001322244523500217405ustar00rootroot00000000000000java-design-patterns-1.18.0/adapter/src/test/java/com/000077500000000000000000000000001322244523500225165ustar00rootroot00000000000000java-design-patterns-1.18.0/adapter/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500243465ustar00rootroot00000000000000java-design-patterns-1.18.0/adapter/src/test/java/com/iluwatar/adapter/000077500000000000000000000000001322244523500257665ustar00rootroot00000000000000java-design-patterns-1.18.0/adapter/src/test/java/com/iluwatar/adapter/AdapterPatternTest.java000066400000000000000000000052141322244523500324110ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.adapter; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import java.util.HashMap; import java.util.Map; import static org.mockito.Mockito.spy; import static org.mockito.Mockito.verify; /** * Test class * */ public class AdapterPatternTest { private Map beans; private static final String FISHING_BEAN = "fisher"; private static final String ROWING_BEAN = "captain"; /** * This method runs before the test execution and sets the bean objects in the beans Map. */ @BeforeEach public void setup() { beans = new HashMap<>(); FishingBoatAdapter fishingBoatAdapter = spy(new FishingBoatAdapter()); beans.put(FISHING_BEAN, fishingBoatAdapter); Captain captain = new Captain(); captain.setRowingBoat((FishingBoatAdapter) beans.get(FISHING_BEAN)); beans.put(ROWING_BEAN, captain); } /** * This test asserts that when we use the row() method on a captain bean(client), it is * internally calling sail method on the fishing boat object. The Adapter ({@link FishingBoatAdapter} * ) converts the interface of the target class ( {@link FishingBoat}) into a suitable one * expected by the client ({@link Captain} ). */ @Test public void testAdapter() { RowingBoat captain = (RowingBoat) beans.get(ROWING_BEAN); // when captain moves captain.row(); // the captain internally calls the battleship object to move RowingBoat adapter = (RowingBoat) beans.get(FISHING_BEAN); verify(adapter).row(); } } java-design-patterns-1.18.0/adapter/src/test/java/com/iluwatar/adapter/AppTest.java000066400000000000000000000026171322244523500302170ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.adapter; import org.junit.jupiter.api.Test; import java.io.IOException; /** * Tests that Adapter example runs without errors. */ public class AppTest { @Test public void test() throws IOException { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/aggregator-microservices/000077500000000000000000000000001322244523500226265ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/README.md000066400000000000000000000017261322244523500241130ustar00rootroot00000000000000--- layout: pattern title: Aggregator Microservices folder: aggregator-microservices permalink: /patterns/aggregator-microservices/ categories: Architectural tags: - Java - Spring --- ## Intent The user makes a single call to the Aggregator, and the aggregator then calls each relevant microservice and collects the data, apply business logic to it, and further publish is as a REST Endpoint. More variations of the aggregator are: - Proxy Microservice Design Pattern: A different microservice is called upon the business need. - Chained Microservice Design Pattern: In this case each microservice is dependent/ chained to a series of other microservices. ![alt text](./etc/aggregator-microservice.png "Aggregator Microservice") ## Applicability Use the Aggregator Microservices pattern when you need a unified API for various microservices, regardless the client device. ## Credits * [Microservice Design Patterns](http://blog.arungupta.me/microservice-design-patterns/) java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/000077500000000000000000000000001322244523500264065ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/pom.xml000066400000000000000000000067241322244523500277340ustar00rootroot00000000000000 aggregator-microservices com.iluwatar 1.18.0 4.0.0 aggregator-service jar org.springframework.boot spring-boot-dependencies org.springframework spring-webmvc org.springframework.boot spring-boot-starter-web org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.mockito mockito-core test org.apache.httpcomponents httpclient org.springframework.boot spring-boot-maven-plugin ${spring-boot.version} repackage java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/000077500000000000000000000000001322244523500271755ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/main/000077500000000000000000000000001322244523500301215ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/main/java/000077500000000000000000000000001322244523500310425ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/main/java/com/000077500000000000000000000000001322244523500316205ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500334505ustar00rootroot00000000000000aggregator/000077500000000000000000000000001322244523500355135ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/main/java/com/iluwatarmicroservices/000077500000000000000000000000001322244523500403705ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/main/java/com/iluwatar/aggregatorAggregator.java000066400000000000000000000037351322244523500433250ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/main/java/com/iluwatar/aggregator/microservices/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.aggregator.microservices; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import javax.annotation.Resource; /** * The aggregator aggregates calls on various micro-services, collects * data and further publishes them under a REST endpoint. */ @RestController public class Aggregator { @Resource private ProductInformationClient informationClient; @Resource private ProductInventoryClient inventoryClient; /** * Retrieves product data. * * @return a Product. */ @RequestMapping("/product") public Product getProduct() { Product product = new Product(); product.setTitle(informationClient.getProductTitle()); product.setProductInventories(inventoryClient.getProductInventories()); return product; } } App.java000066400000000000000000000030561322244523500417570ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/main/java/com/iluwatar/aggregator/microservices/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.aggregator.microservices; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; /** * Spring Boot EntryPoint Class */ @SpringBootApplication public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { SpringApplication.run(App.class, args); } } Product.java000066400000000000000000000033611322244523500426560ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/main/java/com/iluwatar/aggregator/microservices/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.aggregator.microservices; /** * Encapsulates all the data for a Product that clients will request. */ public class Product { /** * The title of the product. */ private String title; /** * The inventories of the product. */ private int productInventories; public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public int getProductInventories() { return productInventories; } public void setProductInventories(int productInventories) { this.productInventories = productInventories; } } ProductInformationClient.java000066400000000000000000000024741322244523500462270ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/main/java/com/iluwatar/aggregator/microservices/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.aggregator.microservices; /** * Interface for the Information micro-service. */ public interface ProductInformationClient { String getProductTitle(); } ProductInformationClientImpl.java000066400000000000000000000044501322244523500470450ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/main/java/com/iluwatar/aggregator/microservices/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.aggregator.microservices; import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.util.EntityUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.stereotype.Component; import java.io.IOException; /** * An adapter to communicate with information micro-service. */ @Component public class ProductInformationClientImpl implements ProductInformationClient { private static final Logger LOGGER = LoggerFactory.getLogger(ProductInformationClientImpl.class); @Override public String getProductTitle() { String response = null; try (CloseableHttpClient httpClient = HttpClients.createDefault()) { HttpGet httpGet = new HttpGet("http://localhost:51515/information"); try (CloseableHttpResponse httpResponse = httpClient.execute(httpGet)) { response = EntityUtils.toString(httpResponse.getEntity()); } } catch (IOException e) { LOGGER.error("Exception caught.", e); } return response; } } ProductInventoryClient.java000066400000000000000000000024651322244523500457370ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/main/java/com/iluwatar/aggregator/microservices/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.aggregator.microservices; /** * Interface to Inventory micro-service. */ public interface ProductInventoryClient { int getProductInventories(); } ProductInventoryClientImpl.java000066400000000000000000000044641322244523500465620ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/main/java/com/iluwatar/aggregator/microservices/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.aggregator.microservices; import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.util.EntityUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.stereotype.Component; import java.io.IOException; /** * An adapter to communicate with inventory micro-service. */ @Component public class ProductInventoryClientImpl implements ProductInventoryClient { private static final Logger LOGGER = LoggerFactory.getLogger(ProductInventoryClientImpl.class); @Override public int getProductInventories() { String response = "0"; try (CloseableHttpClient httpClient = HttpClients.createDefault()) { HttpGet httpGet = new HttpGet("http://localhost:51516/inventories"); try (CloseableHttpResponse httpResponse = httpClient.execute(httpGet)) { response = EntityUtils.toString(httpResponse.getEntity()); } } catch (IOException e) { LOGGER.error("Exception caught.", e); } return Integer.parseInt(response); } } java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/main/resources/000077500000000000000000000000001322244523500321335ustar00rootroot00000000000000application.properties000066400000000000000000000021631322244523500364770ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/main/resources# # The MIT License # Copyright (c) 2014-2016 Ilkka Seppälä # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. # server.port=50004java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/test/000077500000000000000000000000001322244523500301545ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/test/java/000077500000000000000000000000001322244523500310755ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/test/java/com/000077500000000000000000000000001322244523500316535ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500335035ustar00rootroot00000000000000aggregator/000077500000000000000000000000001322244523500355465ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/test/java/com/iluwatarmicroservices/000077500000000000000000000000001322244523500404235ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/test/java/com/iluwatar/aggregatorAggregatorTest.java000066400000000000000000000043741322244523500442200ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/aggregator-service/src/test/java/com/iluwatar/aggregator/microservices/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.aggregator.microservices; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.mockito.InjectMocks; import org.mockito.Mock; import org.mockito.MockitoAnnotations; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.mockito.Mockito.when; /** * Test Aggregation of domain objects */ public class AggregatorTest { @InjectMocks private Aggregator aggregator; @Mock private ProductInformationClient informationClient; @Mock private ProductInventoryClient inventoryClient; @BeforeEach public void setup() { MockitoAnnotations.initMocks(this); } /** * Tests getting the data for a desktop client */ @Test public void testGetProduct() { String title = "The Product Title."; int inventories = 5; when(informationClient.getProductTitle()).thenReturn(title); when(inventoryClient.getProductInventories()).thenReturn(inventories); Product testProduct = aggregator.getProduct(); assertEquals(title, testProduct.getTitle()); assertEquals(inventories, testProduct.getProductInventories()); } } java-design-patterns-1.18.0/aggregator-microservices/etc/000077500000000000000000000000001322244523500234015ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/etc/aggregator-microservice.png000066400000000000000000001205301322244523500307220ustar00rootroot00000000000000PNG  IHDRifIDATx] \(R!lcYK%!1&Y0ul)l!KY"4d"f?oنƈqs߷mݷ|={9j @ tm@ ¿@@ @@ HH![Ot9@G"Q=~B ?ȱH5!@E $@ꄨ Ir, R'Yŋ :!h XA]<{v033whճǎOI kԨWW$uBȱdN>|8{ӧg:4ѱeZZbD/v &SV$uBȱdNvX`hXtʉߟT)V'/_&^U58x:ZťByӫd1_~bll2<_&T'5|pjƌAeLƌ 9"A1]`CkB2Sn$uBȱNOuvnmnnv:̰7AݻqŊfdDDnР&ByIÆ5V&] pU(o,]JɒFɡ<'&f~*I\Hրii0fʡ9Na2$@E $ Oux|$Lh~}lÆuZ"ٲq={W(mw` TjUbWOQ҅ QL:X[X;܉d 3tiIdv8fx$3eHR'-@ H@D ❝[,idffžypf7jР#K*ɯyz:ݑ6:u.\H֐YS 兤NZ9@@!U'ϟQySӧ;Db'9?<,)$uBȱ :!Ir, R'DMHꄠ%c :!jBR'-@ H Q:!h XAN AK " uBԄNZ9@ؓ'zhgffҶmÇW4jTgʔԯzңF}faQ&<|GSٲֵ\l+OOYZVr];qmmkǯ`%Fl7 ,SlR'%`D,D𤗐U@p +fl?"r?l07 ]%KUZ Z5?o`ll4DUO#]QѢEJȑMCժUGݻ jݻ#D򡜐߷ogCâX_:l̙X,^ں.OmHHBݟ=:! {4|㹓7~j<ۡѬ [5.ܤn]KH/~}w"Y3g6a*V,mByuU)իĸHwB_R%޿?ϏM߶mOB>d 3Rr\yҐ5n bN6/$ Zb^II/!v۴؅0{z/F^ c{ ϝ$%a'6CAHݲŏ+0*ʗ/YŔ [|ĉAvݻqjj_LD$K_@]\ڰU"Off 2!u@$\6 k3;ϟ)Y1Ὂ7dƦCTP6== ]ON\@YŔ>nńMUyZ/T'22RvE^b`( 㭬aGJ2SΤ𤗐a@{u<†i ȞfܹxLwoon_)SSf6@>f XVয়6" ϊuzz:(Y"11s =Y3_ӧ r֮j&uB wu)0vG e*]Q V;iGǖX>յ-+ٷouK~DM!OkMW䨆?}:%%A8bmkbUvv'N{`d׮AA{:thCg::|pG=5iR6TfyϏڽ{WȑEq ;89Db :hXsKUjr%E'23SU,v# rlHJ R'ļ“^Bgի1Ӗ,3zX|`fW*cxS(_&s]y +; ǰarr( *G+0رkmgg&īns[,]:vԁ̶U-$sx=5>xrąX(>Db :hXs > )!!-BU۹sdCUO(:!€0yBazCKyߍvXLL\]| Q^|IuMS'!Cfn_€~//gLٿU5`By[(ew5jT/lzBC`Vc-꠱crGtW-۾ƦrlmkgdH6$\~.~>J z,B:#€p`quI@Cql0в 씉ucv<{6q} Zـ^%b^bB]j%˗OxWaLt?WN~sx=qqǎP(O|pJ\XC$0Ǝ1盋kf:sfSffyñJl9s0c 4$\~+!JF~?nZtF@JI{% cm€! nݾHM݀qkWvvVbY`ƍzl̮M(gG>~HNmӦwC{`/_&"0BEq$fOvCA1{Gǖ6̐,B![^sWc:vl֯_WĖ {7cҐxs N Aw ;;v FwT{R?04,ZvY\ըãKk.:?#'8 <߁E1s/-+SrU=m%sT)_(YXy?DcOhHyVuPOR[/]촣׎[{f4!ՓCC͛7Js,-εyW'ժY )<% i@PôΝe6$sr9QAݟ5zu2`#6c{q8dHCvh4^%Gbq`Ϗ4jTgԨ/}|,,ʄڠ-[6433o¦Msum֭mCB&qum2*qphɊ߿P?H7lGfm:? 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Gv횠!B!UРA jU6m}.e) Ǎ{sw߫Ο?%С%j4:y2(\h32\\J`O~$Xlusvn*d>9? !#psϕm//âBsy/Eɡ2- 9=JS+r7n7@ٝ)U OqY҆¾Z͒Y:,\Xa08^.N†7߼yߓ9?0(gwh~192q{1@~ϙ^A )GmI!$u%7o5ۻ!TO<{vrru>l6W'ʺHϧDPN(Hki))wB^ٯei튤N :yMOϝT\-["Ooذ&;ZRH~B;=% OaUd|ٳGM$O*?dO?mexKye+OTma{# ubԳOкhD̛ͧ7r|D6wi͎r27;uy>_.15/\(OTma{#{ҿ?*e'e: gڳ:sQAƽ'Oas걑fS9uպdy>%=2)if"ϜI^Y:QFR'qao:QݔrF gڳ:sf||8?)3..͝FZ\v*'NuZ,ϧܼyzÆ5 pWVNC A\=NTw uÆ,uQW^xyN=32 D;##d, 3|(4,*ryĦSj|L^^ ܩzl ɨNx2N,aw#G%JcA7:! {۸ǏS-HrpdxպˋJ#jGh Ѥ;OP{rӢ guM!5=!ƞXR',աϪ.LCԮ펬 G`bڵa:Չ+:! {۸Չr&rvn*d>uQjN=!ЌII3>,\7۴(I A\=muxKe],ˋPNT3Hܹk_g"I{`lӢ $uB$NR'qAj]TɋP5^sԹOPa h8ImO0?IH4N6Ym` h8I DCh@AdE~$XH@ H !A(P$R'DCH@ ! b :!uHX{C ߎG  uH@ b @ @@ XW@OIIENDB`java-design-patterns-1.18.0/aggregator-microservices/information-microservice/000077500000000000000000000000001322244523500276435ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/information-microservice/pom.xml000066400000000000000000000062371322244523500311700ustar00rootroot00000000000000 aggregator-microservices com.iluwatar 1.18.0 4.0.0 information-microservice jar org.springframework.boot spring-boot-dependencies org.springframework spring-webmvc org.springframework.boot spring-boot-starter-web org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.springframework.boot spring-boot-maven-plugin ${spring-boot.version} repackage java-design-patterns-1.18.0/aggregator-microservices/information-microservice/src/000077500000000000000000000000001322244523500304325ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/information-microservice/src/main/000077500000000000000000000000001322244523500313565ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/information-microservice/src/main/java/000077500000000000000000000000001322244523500322775ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/information-microservice/src/main/java/com/000077500000000000000000000000001322244523500330555ustar00rootroot00000000000000iluwatar/000077500000000000000000000000001322244523500346265ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/information-microservice/src/main/java/cominformation/000077500000000000000000000000001322244523500371535ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/information-microservice/src/main/java/com/iluwatarmicroservice/000077500000000000000000000000001322244523500416455ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/information-microservice/src/main/java/com/iluwatar/informationInformationApplication.java000066400000000000000000000031101322244523500471540ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/information-microservice/src/main/java/com/iluwatar/information/microservice/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.information.microservice; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; /** * Inventory Application starts container (Spring Boot) and exposes the Inventory micro-service. */ @SpringBootApplication public class InformationApplication { public static void main(String[] args) { SpringApplication.run(InformationApplication.class, args); } } InformationController.java000066400000000000000000000033621322244523500470450ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/information-microservice/src/main/java/com/iluwatar/information/microservice/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.information.microservice; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RestController; /** * Controller providing endpoints to retrieve information about products */ @RestController public class InformationController { /** * Endpoint to retrieve a product's informations. * * @return product inventory. */ @RequestMapping(value = "/information", method = RequestMethod.GET) public String getProductTitle() { return "The Product Title."; } } java-design-patterns-1.18.0/aggregator-microservices/information-microservice/src/main/resources/000077500000000000000000000000001322244523500333705ustar00rootroot00000000000000application.properties000066400000000000000000000021631322244523500377340ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/information-microservice/src/main/resources# # The MIT License # Copyright (c) 2014-2016 Ilkka Seppälä # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. # server.port=51515java-design-patterns-1.18.0/aggregator-microservices/information-microservice/src/test/000077500000000000000000000000001322244523500314115ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/information-microservice/src/test/java/000077500000000000000000000000001322244523500323325ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/information-microservice/src/test/java/com/000077500000000000000000000000001322244523500331105ustar00rootroot00000000000000iluwatar/000077500000000000000000000000001322244523500346615ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/information-microservice/src/test/java/cominformation/000077500000000000000000000000001322244523500372065ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/information-microservice/src/test/java/com/iluwatarmicroservice/000077500000000000000000000000001322244523500417005ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/information-microservice/src/test/java/com/iluwatar/informationInformationControllerTest.java000066400000000000000000000031311322244523500477320ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/information-microservice/src/test/java/com/iluwatar/information/microservice/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.information.microservice; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Test for Information Rest Controller */ public class InformationControllerTest { @Test public void shouldGetProductTitle() { InformationController infoController = new InformationController(); String title = infoController.getProductTitle(); assertEquals("The Product Title.", title); } } java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/000077500000000000000000000000001322244523500273535ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/pom.xml000066400000000000000000000062341322244523500306750ustar00rootroot00000000000000 aggregator-microservices com.iluwatar 1.18.0 4.0.0 inventory-microservice jar org.springframework.boot spring-boot-dependencies org.springframework spring-webmvc org.springframework.boot spring-boot-starter-web org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.springframework.boot spring-boot-maven-plugin ${spring-boot.version} repackage java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/src/000077500000000000000000000000001322244523500301425ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/src/main/000077500000000000000000000000001322244523500310665ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/src/main/java/000077500000000000000000000000001322244523500320075ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/src/main/java/com/000077500000000000000000000000001322244523500325655ustar00rootroot00000000000000iluwatar/000077500000000000000000000000001322244523500343365ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/src/main/java/cominventory/000077500000000000000000000000001322244523500363735ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/src/main/java/com/iluwatarmicroservice/000077500000000000000000000000001322244523500410655ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/src/main/java/com/iluwatar/inventoryInventoryApplication.java000066400000000000000000000031031322244523500461060ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/src/main/java/com/iluwatar/inventory/microservice/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.inventory.microservice; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; /** * Inventory Application starts container (Spring Boot) and exposes the Inventory micro-service. */ @SpringBootApplication public class InventoryApplication { public static void main(String[] args) { SpringApplication.run(InventoryApplication.class, args); } } InventoryController.java000066400000000000000000000033271322244523500457760ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/src/main/java/com/iluwatar/inventory/microservice/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.inventory.microservice; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RestController; /** * Controller providing endpoints to retrieve product inventories */ @RestController public class InventoryController { /** * Endpoint to retrieve a product's inventories. * * @return product inventory. */ @RequestMapping(value = "/inventories", method = RequestMethod.GET) public int getProductInventories() { return 5; } } java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/src/main/resources/000077500000000000000000000000001322244523500331005ustar00rootroot00000000000000application.properties000066400000000000000000000021631322244523500374440ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/src/main/resources# # The MIT License # Copyright (c) 2014-2016 Ilkka Seppälä # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. # server.port=51516java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/src/test/000077500000000000000000000000001322244523500311215ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/src/test/java/000077500000000000000000000000001322244523500320425ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/src/test/java/com/000077500000000000000000000000001322244523500326205ustar00rootroot00000000000000iluwatar/000077500000000000000000000000001322244523500343715ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/src/test/java/cominventory/000077500000000000000000000000001322244523500364265ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/src/test/java/com/iluwatarmicroservice/000077500000000000000000000000001322244523500411205ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/src/test/java/com/iluwatar/inventoryInventoryControllerTest.java000066400000000000000000000031641322244523500466700ustar00rootroot00000000000000java-design-patterns-1.18.0/aggregator-microservices/inventory-microservice/src/test/java/com/iluwatar/inventory/microservice/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.inventory.microservice; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Test Inventory Rest Controller */ public class InventoryControllerTest { @Test public void testGetProductInventories() throws Exception { InventoryController inventoryController = new InventoryController(); int numberOfInventories = inventoryController.getProductInventories(); assertEquals(5, numberOfInventories); } } java-design-patterns-1.18.0/aggregator-microservices/pom.xml000066400000000000000000000035321322244523500241460ustar00rootroot00000000000000 java-design-patterns com.iluwatar 1.18.0 4.0.0 aggregator-microservices pom information-microservice aggregator-service inventory-microservice java-design-patterns-1.18.0/api-gateway/000077500000000000000000000000001322244523500200415ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/README.md000066400000000000000000000014471322244523500213260ustar00rootroot00000000000000--- layout: pattern title: API Gateway folder: api-gateway permalink: /patterns/api-gateway/ categories: Architectural tags: - Java - Difficulty-Intermediate - Spring --- ## Intent Aggregate calls to microservices in a single location: the API Gateway. The user makes a single call to the API Gateway, and the API Gateway then calls each relevant microservice. ![alt text](./etc/api-gateway.png "API Gateway") ## Applicability Use the API Gateway pattern when * you're also using the Microservices pattern and need a single point of aggregation for your microservice calls ## Credits * [microservices.io - API Gateway](http://microservices.io/patterns/apigateway.html) * [NGINX - Building Microservices: Using an API Gateway](https://www.nginx.com/blog/building-microservices-using-an-api-gateway/) java-design-patterns-1.18.0/api-gateway/api-gateway-service/000077500000000000000000000000001322244523500237075ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/pom.xml000066400000000000000000000062011322244523500252230ustar00rootroot00000000000000 api-gateway com.iluwatar 1.18.0 4.0.0 api-gateway-service jar org.springframework.boot spring-boot-dependencies org.springframework spring-webmvc org.springframework.boot spring-boot-starter-web org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.mockito mockito-core test org.apache.httpcomponents httpclient org.springframework.boot spring-boot-maven-plugin ${spring-boot.version} repackage java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/000077500000000000000000000000001322244523500244765ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/main/000077500000000000000000000000001322244523500254225ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/main/java/000077500000000000000000000000001322244523500263435ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/main/java/com/000077500000000000000000000000001322244523500271215ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500307515ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/main/java/com/iluwatar/api/000077500000000000000000000000001322244523500315225ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/main/java/com/iluwatar/api/gateway/000077500000000000000000000000001322244523500331635ustar00rootroot00000000000000ApiGateway.java000066400000000000000000000044521322244523500360070ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/main/java/com/iluwatar/api/gateway/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.api.gateway; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import javax.annotation.Resource; /** * The ApiGateway aggregates calls to microservices based on the needs of the individual clients. */ @RestController public class ApiGateway { @Resource private ImageClient imageClient; @Resource private PriceClient priceClient; /** * Retrieves product information that desktop clients need * @return Product information for clients on a desktop */ @RequestMapping("/desktop") public DesktopProduct getProductDesktop() { DesktopProduct desktopProduct = new DesktopProduct(); desktopProduct.setImagePath(imageClient.getImagePath()); desktopProduct.setPrice(priceClient.getPrice()); return desktopProduct; } /** * Retrieves product information that mobile clients need * @return Product information for clients on a mobile device */ @RequestMapping("/mobile") public MobileProduct getProductMobile() { MobileProduct mobileProduct = new MobileProduct(); mobileProduct.setPrice(priceClient.getPrice()); return mobileProduct; } } App.java000066400000000000000000000064741322244523500345020ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/main/java/com/iluwatar/api/gateway/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.api.gateway; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; /** * With the Microservices pattern, a client may need data from multiple different microservices. * If the client called each microservice directly, that could contribute to longer load times, * since the client would have to make a network request for each microservice called. Moreover, * having the client call each microservice directly ties the client to that microservice - if the * internal implementations of the microservices change (for example, if two microservices are * combined sometime in the future) or if the location (host and port) of a microservice changes, * then every client that makes use of those microservices must be updated. * *

* The intent of the API Gateway pattern is to alleviate some of these issues. In the API Gateway * pattern, an additional entity (the API Gateway) is placed between the client and the * microservices. The job of the API Gateway is to aggregate the calls to the microservices. * Rather than the client calling each microservice individually, the client calls the API Gateway * a single time. The API Gateway then calls each of the microservices that the client needs. * *

* This implementation shows what the API Gateway pattern could look like for an e-commerce site. * The {@link ApiGateway} makes calls to the Image and Price microservices using the * {@link ImageClientImpl} and {@link PriceClientImpl} respectively. Customers viewing the site on a * desktop device can see both price information and an image of a product, so the {@link ApiGateway} * calls both of the microservices and aggregates the data in the {@link DesktopProduct} model. * However, mobile users only see price information; they do not see a product image. For mobile * users, the {@link ApiGateway} only retrieves price information, which it uses to populate the * {@link MobileProduct}. */ @SpringBootApplication public class App { /** * Program entry point * * @param args * command line args */ public static void main(String[] args) { SpringApplication.run(App.class, args); } } DesktopProduct.java000066400000000000000000000032721322244523500367250ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/main/java/com/iluwatar/api/gateway/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.api.gateway; /** * Encapsulates all of the information that a desktop client needs to display a product. */ public class DesktopProduct { /** * The price of the product */ private String price; /** * The path to the image of the product */ private String imagePath; public String getPrice() { return price; } public void setPrice(String price) { this.price = price; } public String getImagePath() { return imagePath; } public void setImagePath(String imagePath) { this.imagePath = imagePath; } } ImageClient.java000066400000000000000000000024361322244523500361350ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/main/java/com/iluwatar/api/gateway/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.api.gateway; /** * An interface used to communicate with the Image microservice */ public interface ImageClient { String getImagePath(); } ImageClientImpl.java000066400000000000000000000042501322244523500367530ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/main/java/com/iluwatar/api/gateway/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.api.gateway; import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.util.EntityUtils; import org.springframework.stereotype.Component; import java.io.IOException; /** * An adapter to communicate with the Image microservice */ @Component public class ImageClientImpl implements ImageClient { /** * Makes a simple HTTP Get request to the Image microservice * @return The path to the image */ @Override public String getImagePath() { String response = null; try (CloseableHttpClient httpClient = HttpClients.createDefault()) { HttpGet httpGet = new HttpGet("http://localhost:50005/image-path"); try (CloseableHttpResponse httpResponse = httpClient.execute(httpGet)) { response = EntityUtils.toString(httpResponse.getEntity()); } } catch (IOException e) { e.printStackTrace(); } return response; } } MobileProduct.java000066400000000000000000000027231322244523500365230ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/main/java/com/iluwatar/api/gateway/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.api.gateway; /** * Encapsulates all of the information that mobile client needs to display a product. */ public class MobileProduct { /** * The price of the product */ private String price; public String getPrice() { return price; } public void setPrice(String price) { this.price = price; } } PriceClient.java000066400000000000000000000024321322244523500361510ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/main/java/com/iluwatar/api/gateway/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.api.gateway; /** * An interface used to communicate with the Price microservice */ public interface PriceClient { String getPrice(); } PriceClientImpl.java000066400000000000000000000042421322244523500367740ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/main/java/com/iluwatar/api/gateway/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.api.gateway; import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.util.EntityUtils; import org.springframework.stereotype.Component; import java.io.IOException; /** * An adapter to communicate with the Price microservice */ @Component public class PriceClientImpl implements PriceClient { /** * Makes a simple HTTP Get request to the Price microservice * @return The price of the product */ @Override public String getPrice() { String response = null; try (CloseableHttpClient httpClient = HttpClients.createDefault()) { HttpGet httpGet = new HttpGet("http://localhost:50006/price"); try (CloseableHttpResponse httpResponse = httpClient.execute(httpGet)) { response = EntityUtils.toString(httpResponse.getEntity()); } } catch (IOException e) { e.printStackTrace(); } return response; } } java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/main/resources/000077500000000000000000000000001322244523500274345ustar00rootroot00000000000000application.properties000066400000000000000000000021631322244523500340000ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/main/resources# # The MIT License # Copyright (c) 2014-2016 Ilkka Seppälä # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. # server.port=50004java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/test/000077500000000000000000000000001322244523500254555ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/test/java/000077500000000000000000000000001322244523500263765ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/test/java/com/000077500000000000000000000000001322244523500271545ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500310045ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/test/java/com/iluwatar/api/000077500000000000000000000000001322244523500315555ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/test/java/com/iluwatar/api/gateway/000077500000000000000000000000001322244523500332165ustar00rootroot00000000000000ApiGatewayTest.java000066400000000000000000000047401322244523500367020ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/api-gateway-service/src/test/java/com/iluwatar/api/gateway/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.api.gateway; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.mockito.InjectMocks; import org.mockito.Mock; import org.mockito.MockitoAnnotations; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.mockito.Mockito.when; /** * Test API Gateway Pattern */ public class ApiGatewayTest { @InjectMocks private ApiGateway apiGateway; @Mock private ImageClient imageClient; @Mock private PriceClient priceClient; @BeforeEach public void setup() { MockitoAnnotations.initMocks(this); } /** * Tests getting the data for a desktop client */ @Test public void testGetProductDesktop() { String imagePath = "/product-image.png"; String price = "20"; when(imageClient.getImagePath()).thenReturn(imagePath); when(priceClient.getPrice()).thenReturn(price); DesktopProduct desktopProduct = apiGateway.getProductDesktop(); assertEquals(price, desktopProduct.getPrice()); assertEquals(imagePath, desktopProduct.getImagePath()); } /** * Tests getting the data for a mobile client */ @Test public void testGetProductMobile() { String price = "20"; when(priceClient.getPrice()).thenReturn(price); MobileProduct mobileProduct = apiGateway.getProductMobile(); assertEquals(price, mobileProduct.getPrice()); } } java-design-patterns-1.18.0/api-gateway/etc/000077500000000000000000000000001322244523500206145ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/etc/api-gateway.png000066400000000000000000000436231322244523500235420ustar00rootroot00000000000000PNG  IHDRTHGZIDATx]Օ[<"҈+f.B G+1u 1qB@&v<8c;rl6·s!n]`M$3h$`ntGǾjW]ݵvUZTU׫Z3 JU jVBGZL1?H^5"%~ H\X!S5<\X!S5<`vw imߍЃAl+yV5jbЙVܫ3-7$"}/?:dCVEjdK&vmd`eoU\&m*CM[Xa*Xyjjи^ "։ Y|5jŽFW}}݁saw/\CMnƏ]f߆oW/cp`?Uv¢p¿ff;y* CrcAz*FVG,>uJ5yɅ ;N.~w߮lӚĎ_8[p`Kf*^KpM:WjP).VV'LAqa V!@z+ kTv߱fƭ?_z+'v=J޴8{OM`%Бe0' x0Z:v*"Vl\X&h^_5o]_-GZ 0*b6Iɛ1j0kX`kd?g9ݱՐ+ 6-Pf]|MaNT hTXToQ$` 3?<,Fsm*G74JUsG#c<JHmQt "K#BJLf|VE^Ja2-SPi1hT^t1Ԑ3mZ,ُ~%m|MУF4khBqA<ᙹm.с 9V `&`COVo"1#" `ۥQIf\sGʶ$hcߞRu4yh+-嶌QnWBx~;|/ 1fa۩V#h'#Sф~+D9H&1mK AXKݵ^o"F<7j;Z]t;F1Th5Th5Th5Th5T+V|5Sw̏ Vd:kui"ؐXѦVd-r_GVY|fy` `Edq}RN|h"Ob5dq}RNh "O}Y|\,;,ͳdqa+Î]ۍjlSe½4֚-Y|\JiG o5InwaFXaJBEO)_0I"0TPK8 6^z}u%¼3*c7Yk0 -0OB LJ M{.c4oxe7 6T`ekZ"].pI4Spo{6y&LR#Xʬc KFgVMd+UzGQA@ K/⒚Ih$d1q1b%~g䭰_&a7ےh?tգ'DWm5ی.i)Tz^S5*gĚVAV>D|F*̥\,khm*FP&Xؿg?`d[P^g Kȧ~k `?K$FMb]"n`VLcdOA@MoX[Ln?󏝝'/?4K_D=Ey}}5w&ANa]>x2XaCI|SUBVɫvR"A`%=¡W7 V^4CZIb Df7GPKz昼V:54_]2Xw[v+xw'nUTՂY==:yVjx@XjXa%7`Xњk+;Xњk+;Xњk+;Xњk+;XP+ 0/FBGku|3 ¼3 'X|ԢjbܻbٝtC'=*eXt4C\A`20[mL%߂mS*eX}j QB͠I5q%:r3Fə?B .%`eX@=BC [z$P-GU7o?)YE*lZ?Yk E*@KAH˵{q*K"W5!\RCY j9yI9Xke5W lcJA_\DKMr\=$#R THWԠ^5HG_򛷟Ӭ`fhHe5WB һbm(Ai6#!Cy.`~r֌rS24k22@ ]1Tj]jI㹨;ʳ  j9yI9Jkv96|`eW]ka͠woOR2B$v# W2Ppɫꏪo~RNl-dT [;d TBEfj)tV*[G51 Ch~< i)̂V/eh&3ah`Jeh!vh+;XR:Zdt O 6T%Mf83Fj V*;`}~b+;Xњk+;Xњk+;Xњk+;Xњk~ 칺hyt# m%iv]wXTks|6@b˓StmťPvu &6 `m fWV:>1oVoNʹnו'*f͵2 SҽaPͼ#iW3vYixC%,V&X_A`'L"KJc(1'-X?Qbj;,fkɌ͸c_8E2 S_A''Bv}RNd1!tj W_,:4x2v]wXI9Jk+dk.A>OÐwbȻ0|.L^A i<ږ>'\;,f:Z ]!i`=\O%&[ީ3/Gsqʕn%u 6KD R:ZՓڼ(; 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QkiҺR)gXOBo>_v|@5Kadrh|8~"–t"[@O]XJZ*%le,5uOlt>+VR^j)*dɱ I]]ۧ[6&LvX 4X#O'(n ,BYFB?Mt>W8 ?;U<&U-D},Kz9u jVU}bس;WgOkO|'HO滤SS>2,a K}dX#RQ,K D(/EX~Vw,2 ұyit^jRW ' '@xuf~qh4]lZ:!uf˯ `uBRGo@ ;0bJQ O Ay 'd W*RrW"VƲFϘX_e,8~YVᄠd)2s]% g6ǯODG7`#>qU ,U?r~ $y<jYjXF)Q?:9!$9H)`iȰG>2,yWS3nw57RͰg-/KIENDB`java-design-patterns-1.18.0/api-gateway/image-microservice/etc/image-microservice.ucls000066400000000000000000000026641322244523500310400ustar00rootroot00000000000000 java-design-patterns-1.18.0/api-gateway/image-microservice/pom.xml000066400000000000000000000055631322244523500251410ustar00rootroot00000000000000 api-gateway com.iluwatar 1.18.0 4.0.0 image-microservice jar org.springframework.boot spring-boot-dependencies org.springframework spring-webmvc org.springframework.boot spring-boot-starter-web org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.springframework.boot spring-boot-maven-plugin ${spring-boot.version} repackage java-design-patterns-1.18.0/api-gateway/image-microservice/src/000077500000000000000000000000001322244523500244025ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/image-microservice/src/main/000077500000000000000000000000001322244523500253265ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/image-microservice/src/main/java/000077500000000000000000000000001322244523500262475ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/image-microservice/src/main/java/com/000077500000000000000000000000001322244523500270255ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/image-microservice/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500306555ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/image-microservice/src/main/java/com/iluwatar/image/000077500000000000000000000000001322244523500317375ustar00rootroot00000000000000microservice/000077500000000000000000000000001322244523500343525ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/image-microservice/src/main/java/com/iluwatar/imageImageApplication.java000066400000000000000000000032421322244523500404240ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/image-microservice/src/main/java/com/iluwatar/image/microservice/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.image.microservice; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; /** * ImageApplication starts up Spring Boot, exposing endpoints for the Image microservice through * the {@link ImageController}. */ @SpringBootApplication public class ImageApplication { /** * Microservice entry point * @param args * command line args */ public static void main(String[] args) { SpringApplication.run(ImageApplication.class, args); } } ImageController.java000066400000000000000000000032601322244523500403040ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/image-microservice/src/main/java/com/iluwatar/image/microservice/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.image.microservice; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RestController; /** * Exposes the Image microservice's endpoints */ @RestController public class ImageController { /** * An endpoint for a user to retrieve an image path * @return An image path */ @RequestMapping(value = "/image-path", method = RequestMethod.GET) public String getImagePath() { return "/product-image.png"; } } java-design-patterns-1.18.0/api-gateway/image-microservice/src/main/resources/000077500000000000000000000000001322244523500273405ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/image-microservice/src/main/resources/application.properties000066400000000000000000000021631322244523500337630ustar00rootroot00000000000000# # The MIT License # Copyright (c) 2014-2016 Ilkka Seppälä # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. # server.port=50005java-design-patterns-1.18.0/api-gateway/image-microservice/src/test/000077500000000000000000000000001322244523500253615ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/image-microservice/src/test/java/000077500000000000000000000000001322244523500263025ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/image-microservice/src/test/java/com/000077500000000000000000000000001322244523500270605ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/image-microservice/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500307105ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/image-microservice/src/test/java/com/iluwatar/image/000077500000000000000000000000001322244523500317725ustar00rootroot00000000000000microservice/000077500000000000000000000000001322244523500344055ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/image-microservice/src/test/java/com/iluwatar/imageImageControllerTest.java000066400000000000000000000030541322244523500412000ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/image-microservice/src/test/java/com/iluwatar/image/microservice/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.image.microservice; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Test for Image Rest Controller */ public class ImageControllerTest { @Test public void testGetImagePath() { ImageController imageController = new ImageController(); String imagePath = imageController.getImagePath(); assertEquals("/product-image.png", imagePath); } } java-design-patterns-1.18.0/api-gateway/pom.xml000066400000000000000000000034361322244523500213640ustar00rootroot00000000000000 java-design-patterns com.iluwatar 1.18.0 4.0.0 api-gateway pom image-microservice price-microservice api-gateway-service java-design-patterns-1.18.0/api-gateway/price-microservice/000077500000000000000000000000001322244523500236335ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/price-microservice/etc/000077500000000000000000000000001322244523500244065ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/price-microservice/etc/price-microservice.png000066400000000000000000000050141322244523500307060ustar00rootroot00000000000000PNG  IHDRiSRD IDATxoE/14N 4ƤQB )RV %.T*`[ҊhĊF $-P!@7WH&Cbronyn6\3;7eX3 O›?٘>"& ɸ@r-kIbCQ.4ƹ_ of)U^xZe4<), Oaix ̄;oTڋTQO(n#)C*jy?eD) <2Ä& c!P ӛі#̤ nDZN8('$a!^\|;XD^i$4lP# 6ݡBҫy*AY 4gA ^ː4033 ðD栽%tގ,"Z@f ,HH\Oe2|Z(¼KSEa0a9_St4+ -Ǘ'rKB\d"+<۝O 看65Q 篈6 cL쮃T`e/H2w"g%a͊ jXx=Oo4L} X"3 [iT ] ٍصE S!t|k-̬/ )ʌ#& Oa 4<),99s#`-OUt4<),9<=`QݦVySOkSW*k\l#&+E~)2txͱ>}D=dB)ܣ 9<_Zmlvfҹ_wdw 0$7E摋-njo~3veN+gr;Yx0 I`q䴲C=L4 5IWÓN҇3ؗU_>~}|G"Z =sOFmH=,v.]1 ' Oc*ﱾxO|G~{- J{2^tl!n*]FҀt_6u1,({ru';yxnUvxYR x{::{6 'tc-S~96ԙR&H!xW7zš_> /Āgƌ2иC؀҇͒o,4l- X\m9WN^ 6*ԭjOVD), Oaix KSXf\/?`p1}NL#[:JOfI/Ji_] {ܱ` 6Q@P.SsOʈW*{c7!w {`R ^XK@CTf java-design-patterns-1.18.0/api-gateway/price-microservice/pom.xml000066400000000000000000000055631322244523500251610ustar00rootroot00000000000000 api-gateway com.iluwatar 1.18.0 4.0.0 price-microservice jar org.springframework.boot spring-boot-dependencies org.springframework spring-webmvc org.springframework.boot spring-boot-starter-web org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.springframework.boot spring-boot-maven-plugin ${spring-boot.version} repackage java-design-patterns-1.18.0/api-gateway/price-microservice/src/000077500000000000000000000000001322244523500244225ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/price-microservice/src/main/000077500000000000000000000000001322244523500253465ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/price-microservice/src/main/java/000077500000000000000000000000001322244523500262675ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/price-microservice/src/main/java/com/000077500000000000000000000000001322244523500270455ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/price-microservice/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500306755ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/price-microservice/src/main/java/com/iluwatar/price/000077500000000000000000000000001322244523500317775ustar00rootroot00000000000000microservice/000077500000000000000000000000001322244523500344125ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/price-microservice/src/main/java/com/iluwatar/pricePriceApplication.java000066400000000000000000000032421322244523500405040ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/price-microservice/src/main/java/com/iluwatar/price/microservice/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.price.microservice; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; /** * PriceApplication starts up Spring Boot, exposing endpoints for the Price microservice through * the {@link PriceController}. */ @SpringBootApplication public class PriceApplication { /** * Microservice entry point * @param args * command line args */ public static void main(String[] args) { SpringApplication.run(PriceApplication.class, args); } } PriceController.java000066400000000000000000000032371322244523500403700ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/price-microservice/src/main/java/com/iluwatar/price/microservice/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.price.microservice; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RestController; /** * Exposes the Price microservice's endpoints */ @RestController public class PriceController { /** * An endpoint for a user to retrieve a product's price * @return A product's price */ @RequestMapping(value = "/price", method = RequestMethod.GET) public String getPrice() { return "20"; } } java-design-patterns-1.18.0/api-gateway/price-microservice/src/main/resources/000077500000000000000000000000001322244523500273605ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/price-microservice/src/main/resources/application.properties000066400000000000000000000021631322244523500340030ustar00rootroot00000000000000# # The MIT License # Copyright (c) 2014-2016 Ilkka Seppälä # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. # server.port=50006java-design-patterns-1.18.0/api-gateway/price-microservice/src/test/000077500000000000000000000000001322244523500254015ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/price-microservice/src/test/java/000077500000000000000000000000001322244523500263225ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/price-microservice/src/test/java/com/000077500000000000000000000000001322244523500271005ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/price-microservice/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500307305ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/price-microservice/src/test/java/com/iluwatar/price/000077500000000000000000000000001322244523500320325ustar00rootroot00000000000000microservice/000077500000000000000000000000001322244523500344455ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/price-microservice/src/test/java/com/iluwatar/pricePriceControllerTest.java000066400000000000000000000030141322244523500412540ustar00rootroot00000000000000java-design-patterns-1.18.0/api-gateway/price-microservice/src/test/java/com/iluwatar/price/microservice/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.price.microservice; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Test for Price Rest Controller */ public class PriceControllerTest { @Test public void testgetPrice() { PriceController priceController = new PriceController(); String price = priceController.getPrice(); assertEquals("20", price); } } java-design-patterns-1.18.0/async-method-invocation/000077500000000000000000000000001322244523500223735ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/README.md000066400000000000000000000024621322244523500236560ustar00rootroot00000000000000--- layout: pattern title: Async Method Invocation folder: async-method-invocation permalink: /patterns/async-method-invocation/ categories: Concurrency tags: - Java - Difficulty-Intermediate - Functional - Reactive --- ## Intent Asynchronous method invocation is pattern where the calling thread is not blocked while waiting results of tasks. The pattern provides parallel processing of multiple independent tasks and retrieving the results via callbacks or waiting until everything is done. ![alt text](./etc/async-method-invocation.png "Async Method Invocation") ## Applicability Use async method invocation pattern when * you have multiple independent tasks that can run in parallel * you need to improve the performance of a group of sequential tasks * you have limited amount of processing capacity or long running tasks and the caller should not wait the tasks to be ready ## Real world examples * [FutureTask](http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/FutureTask.html), [CompletableFuture](https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CompletableFuture.html) and [ExecutorService](http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html) (Java) * [Task-based Asynchronous Pattern](https://msdn.microsoft.com/en-us/library/hh873175.aspx) (.NET) 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PB @8PJ(&K\e QB @8Mw#hP!631JƠ#6 <P1(ac`b6 <P1(ac`b6 <Pnc;̕=Zyl"6 <Pdct72]I{y&1T1W>3OXS AqF,"qǾ*b腍& y˧o?Ղz)lٌl̨ަr/2t7ݩ_3)j+Ǔj%QX*hBq٘K~ŏ|ҮzV5*K3ʢ'թbt6Cr^6(Zac`ecys닭R-R463*K*1H)ZI_֎JQkz{PRA<ک3/^{)WT+mL3RrDطEؘ& 9{mlxZ8qsM46d,ִI=1/l ,4yx?=9s7oo~ZP/m:Ƙ~5>lex3_Khwޫ=6m1Tp޵be oT:6R,lMKae}MbepJƐὴ2SYRAp-ܘ䄍& yaykid/l ,4yԉ^hbe2h1T2\RB6 <P1(ac`b6 <P1(ac`b6 <Phlml3#z *& ÷1ږc~~D'l ,4ym̕ϯ?S7cYƔ]1hǿ`c6 <P<6.=䫷w\W ꥰ25YǓ$%rCW%߸\;xLǣ2Ӭ<՛67zMX*hBq٘K~ŏ|ҮzViIȖ'K2]]Y){Tai薣`#{8HkjoVBlLdRAR R3@up#-脍& ySgn_R+zVԒ.$(C1L/l1`T~J?3v̲cf1T1grbP 'nfI1|e7E'l ,4yDkcl˃(l ,4yDlc9RAJ6-1TA1KM@(1Tr#F}RXH l $6 IENDB`java-design-patterns-1.18.0/async-method-invocation/etc/async-method-invocation.ucls000066400000000000000000000117631322244523500306100ustar00rootroot00000000000000 java-design-patterns-1.18.0/async-method-invocation/pom.xml000066400000000000000000000041071322244523500237120ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 async-method-invocation org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.mockito mockito-core test java-design-patterns-1.18.0/async-method-invocation/src/000077500000000000000000000000001322244523500231625ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/main/000077500000000000000000000000001322244523500241065ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/main/java/000077500000000000000000000000001322244523500250275ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/main/java/com/000077500000000000000000000000001322244523500256055ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500274355ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/main/java/com/iluwatar/async/000077500000000000000000000000001322244523500305525ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/main/java/com/iluwatar/async/method/000077500000000000000000000000001322244523500320325ustar00rootroot00000000000000invocation/000077500000000000000000000000001322244523500341245ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/main/java/com/iluwatar/async/methodApp.java000066400000000000000000000124241322244523500355120ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/main/java/com/iluwatar/async/method/invocation/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.async.method.invocation; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.concurrent.Callable; /** * This application demonstrates the async method invocation pattern. Key parts of the pattern are * AsyncResult which is an intermediate container for an asynchronously evaluated value, * AsyncCallback which can be provided to be executed on task completion and AsyncExecutor * that manages the execution of the async tasks. *

* The main method shows example flow of async invocations. The main thread starts multiple tasks with variable * durations and then continues its own work. When the main thread has done it's job it collects the results of the * async tasks. Two of the tasks are handled with callbacks, meaning the callbacks are executed immediately when the * tasks complete. *

* Noteworthy difference of thread usage between the async results and callbacks is that the async results are collected * in the main thread but the callbacks are executed within the worker threads. This should be noted when working with * thread pools. *

* Java provides its own implementations of async method invocation pattern. FutureTask, CompletableFuture and * ExecutorService are the real world implementations of this pattern. But due to the nature of parallel programming, * the implementations are not trivial. This example does not take all possible scenarios into account but rather * provides a simple version that helps to understand the pattern. * * @see AsyncResult * @see AsyncCallback * @see AsyncExecutor * * @see java.util.concurrent.FutureTask * @see java.util.concurrent.CompletableFuture * @see java.util.concurrent.ExecutorService */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point */ public static void main(String[] args) throws Exception { // construct a new executor that will run async tasks AsyncExecutor executor = new ThreadAsyncExecutor(); // start few async tasks with varying processing times, two last with callback handlers AsyncResult asyncResult1 = executor.startProcess(lazyval(10, 500)); AsyncResult asyncResult2 = executor.startProcess(lazyval("test", 300)); AsyncResult asyncResult3 = executor.startProcess(lazyval(50L, 700)); AsyncResult asyncResult4 = executor.startProcess(lazyval(20, 400), callback("Callback result 4")); AsyncResult asyncResult5 = executor.startProcess(lazyval("callback", 600), callback("Callback result 5")); // emulate processing in the current thread while async tasks are running in their own threads Thread.sleep(350); // Oh boy I'm working hard here log("Some hard work done"); // wait for completion of the tasks Integer result1 = executor.endProcess(asyncResult1); String result2 = executor.endProcess(asyncResult2); Long result3 = executor.endProcess(asyncResult3); asyncResult4.await(); asyncResult5.await(); // log the results of the tasks, callbacks log immediately when complete log("Result 1: " + result1); log("Result 2: " + result2); log("Result 3: " + result3); } /** * Creates a callable that lazily evaluates to given value with artificial delay. * * @param value * value to evaluate * @param delayMillis * artificial delay in milliseconds * @return new callable for lazy evaluation */ private static Callable lazyval(T value, long delayMillis) { return () -> { Thread.sleep(delayMillis); log("Task completed with: " + value); return value; }; } /** * Creates a simple callback that logs the complete status of the async result. * * @param name * callback name * @return new async callback */ private static AsyncCallback callback(String name) { return (value, ex) -> { if (ex.isPresent()) { log(name + " failed: " + ex.map(Exception::getMessage).orElse("")); } else { log(name + ": " + value); } }; } private static void log(String msg) { LOGGER.info(msg); } } AsyncCallback.java000066400000000000000000000031601322244523500374610ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/main/java/com/iluwatar/async/method/invocation/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.async.method.invocation; import java.util.Optional; /** * * AsyncCallback interface * * @param * */ public interface AsyncCallback { /** * Complete handler which is executed when async task is completed or fails execution. * * @param value the evaluated value from async task, undefined when execution fails * @param ex empty value if execution succeeds, some exception if executions fails */ void onComplete(T value, Optional ex); } AsyncExecutor.java000066400000000000000000000046611322244523500375720ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/main/java/com/iluwatar/async/method/invocation/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.async.method.invocation; import java.util.concurrent.Callable; import java.util.concurrent.ExecutionException; /** * * AsyncExecutor interface * */ public interface AsyncExecutor { /** * Starts processing of an async task. Returns immediately with async result. * * @param task task to be executed asynchronously * @return async result for the task */ AsyncResult startProcess(Callable task); /** * Starts processing of an async task. Returns immediately with async result. Executes callback * when the task is completed. * * @param task task to be executed asynchronously * @param callback callback to be executed on task completion * @return async result for the task */ AsyncResult startProcess(Callable task, AsyncCallback callback); /** * Ends processing of an async task. Blocks the current thread if necessary and returns the * evaluated value of the completed task. * * @param asyncResult async result of a task * @return evaluated value of the completed task * @throws ExecutionException if execution has failed, containing the root cause * @throws InterruptedException if the execution is interrupted */ T endProcess(AsyncResult asyncResult) throws ExecutionException, InterruptedException; } AsyncResult.java000066400000000000000000000040001322244523500372350ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/main/java/com/iluwatar/async/method/invocation/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.async.method.invocation; import java.util.concurrent.ExecutionException; /** * AsyncResult interface * @param parameter returned when getValue is invoked */ public interface AsyncResult { /** * Status of the async task execution. * * @return true if execution is completed or failed */ boolean isCompleted(); /** * Gets the value of completed async task. * * @return evaluated value or throws ExecutionException if execution has failed * @throws ExecutionException if execution has failed, containing the root cause * @throws IllegalStateException if execution is not completed */ T getValue() throws ExecutionException; /** * Blocks the current thread until the async task is completed. * * @throws InterruptedException if the execution is interrupted */ void await() throws InterruptedException; } ThreadAsyncExecutor.java000066400000000000000000000110611322244523500407120ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/main/java/com/iluwatar/async/method/invocation/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.async.method.invocation; import java.util.Optional; import java.util.concurrent.Callable; import java.util.concurrent.ExecutionException; import java.util.concurrent.atomic.AtomicInteger; /** * * Implementation of async executor that creates a new thread for every task. * */ public class ThreadAsyncExecutor implements AsyncExecutor { /** Index for thread naming */ private final AtomicInteger idx = new AtomicInteger(0); @Override public AsyncResult startProcess(Callable task) { return startProcess(task, null); } @Override public AsyncResult startProcess(Callable task, AsyncCallback callback) { CompletableResult result = new CompletableResult<>(callback); new Thread(() -> { try { result.setValue(task.call()); } catch (Exception ex) { result.setException(ex); } } , "executor-" + idx.incrementAndGet()).start(); return result; } @Override public T endProcess(AsyncResult asyncResult) throws ExecutionException, InterruptedException { if (!asyncResult.isCompleted()) { asyncResult.await(); } return asyncResult.getValue(); } /** * Simple implementation of async result that allows completing it successfully with a value or exceptionally with an * exception. A really simplified version from its real life cousins FutureTask and CompletableFuture. * * @see java.util.concurrent.FutureTask * @see java.util.concurrent.CompletableFuture */ private static class CompletableResult implements AsyncResult { static final int RUNNING = 1; static final int FAILED = 2; static final int COMPLETED = 3; final Object lock; final Optional> callback; volatile int state = RUNNING; T value; Exception exception; CompletableResult(AsyncCallback callback) { this.lock = new Object(); this.callback = Optional.ofNullable(callback); } /** * Sets the value from successful execution and executes callback if available. Notifies any thread waiting for * completion. * * @param value * value of the evaluated task */ void setValue(T value) { this.value = value; this.state = COMPLETED; this.callback.ifPresent(ac -> ac.onComplete(value, Optional.empty())); synchronized (lock) { lock.notifyAll(); } } /** * Sets the exception from failed execution and executes callback if available. Notifies any thread waiting for * completion. * * @param exception * exception of the failed task */ void setException(Exception exception) { this.exception = exception; this.state = FAILED; this.callback.ifPresent(ac -> ac.onComplete(null, Optional.of(exception))); synchronized (lock) { lock.notifyAll(); } } @Override public boolean isCompleted() { return state > RUNNING; } @Override public T getValue() throws ExecutionException { if (state == COMPLETED) { return value; } else if (state == FAILED) { throw new ExecutionException(exception); } else { throw new IllegalStateException("Execution not completed yet"); } } @Override public void await() throws InterruptedException { synchronized (lock) { while (!isCompleted()) { lock.wait(); } } } } } java-design-patterns-1.18.0/async-method-invocation/src/test/000077500000000000000000000000001322244523500241415ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/test/java/000077500000000000000000000000001322244523500250625ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/test/java/com/000077500000000000000000000000001322244523500256405ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500274705ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/test/java/com/iluwatar/async/000077500000000000000000000000001322244523500306055ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/test/java/com/iluwatar/async/method/000077500000000000000000000000001322244523500320655ustar00rootroot00000000000000invocation/000077500000000000000000000000001322244523500341575ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/test/java/com/iluwatar/async/methodAppTest.java000066400000000000000000000025511322244523500364050ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/test/java/com/iluwatar/async/method/invocation/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.async.method.invocation; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() throws Exception { String[] args = {}; App.main(args); } } ThreadAsyncExecutorTest.java000066400000000000000000000323031322244523500416070ustar00rootroot00000000000000java-design-patterns-1.18.0/async-method-invocation/src/test/java/com/iluwatar/async/method/invocation/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.async.method.invocation; import org.junit.jupiter.api.Test; import org.mockito.ArgumentCaptor; import org.mockito.Matchers; import java.util.Optional; import java.util.concurrent.Callable; import java.util.concurrent.ExecutionException; import static java.time.Duration.ofMillis; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertSame; import static org.junit.jupiter.api.Assertions.assertTimeout; import static org.junit.jupiter.api.Assertions.assertTrue; import static org.junit.jupiter.api.Assertions.fail; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.timeout; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; import static org.mockito.Mockito.when; import static org.mockito.internal.verification.VerificationModeFactory.times; /** * Date: 12/6/15 - 10:49 AM * * @author Jeroen Meulemeester */ public class ThreadAsyncExecutorTest { /** * Test used to verify the happy path of {@link ThreadAsyncExecutor#startProcess(Callable)} */ @Test public void testSuccessfulTaskWithoutCallback() throws Exception { assertTimeout(ofMillis(3000), () -> { // Instantiate a new executor and start a new 'null' task ... final ThreadAsyncExecutor executor = new ThreadAsyncExecutor(); final Object result = new Object(); final Callable task = mock(Callable.class); when(task.call()).thenReturn(result); final AsyncResult asyncResult = executor.startProcess(task); assertNotNull(asyncResult); asyncResult.await(); // Prevent timing issues, and wait until the result is available assertTrue(asyncResult.isCompleted()); // Our task should only execute once ... verify(task, times(1)).call(); // ... and the result should be exactly the same object assertSame(result, asyncResult.getValue()); }); } /** * Test used to verify the happy path of {@link ThreadAsyncExecutor#startProcess(Callable, AsyncCallback)} */ @Test public void testSuccessfulTaskWithCallback() throws Exception { assertTimeout(ofMillis(3000), () -> { // Instantiate a new executor and start a new 'null' task ... final ThreadAsyncExecutor executor = new ThreadAsyncExecutor(); final Object result = new Object(); final Callable task = mock(Callable.class); when(task.call()).thenReturn(result); final AsyncCallback callback = mock(AsyncCallback.class); final AsyncResult asyncResult = executor.startProcess(task, callback); assertNotNull(asyncResult); asyncResult.await(); // Prevent timing issues, and wait until the result is available assertTrue(asyncResult.isCompleted()); // Our task should only execute once ... verify(task, times(1)).call(); // ... same for the callback, we expect our object final ArgumentCaptor> optionalCaptor = ArgumentCaptor.forClass((Class) Optional.class); verify(callback, times(1)).onComplete(eq(result), optionalCaptor.capture()); final Optional optionalException = optionalCaptor.getValue(); assertNotNull(optionalException); assertFalse(optionalException.isPresent()); // ... and the result should be exactly the same object assertSame(result, asyncResult.getValue()); }); } /** * Test used to verify the happy path of {@link ThreadAsyncExecutor#startProcess(Callable)} when a task takes a while * to execute */ @Test public void testLongRunningTaskWithoutCallback() throws Exception { assertTimeout(ofMillis(5000), () -> { // Instantiate a new executor and start a new 'null' task ... final ThreadAsyncExecutor executor = new ThreadAsyncExecutor(); final Object result = new Object(); final Callable task = mock(Callable.class); when(task.call()).thenAnswer(i -> { Thread.sleep(1500); return result; }); final AsyncResult asyncResult = executor.startProcess(task); assertNotNull(asyncResult); assertFalse(asyncResult.isCompleted()); try { asyncResult.getValue(); fail("Expected IllegalStateException when calling AsyncResult#getValue on a non-completed task"); } catch (IllegalStateException e) { assertNotNull(e.getMessage()); } // Our task should only execute once, but it can take a while ... verify(task, timeout(3000).times(1)).call(); // Prevent timing issues, and wait until the result is available asyncResult.await(); assertTrue(asyncResult.isCompleted()); verifyNoMoreInteractions(task); // ... and the result should be exactly the same object assertSame(result, asyncResult.getValue()); }); } /** * Test used to verify the happy path of {@link ThreadAsyncExecutor#startProcess(Callable, AsyncCallback)} when a task * takes a while to execute */ @Test public void testLongRunningTaskWithCallback() throws Exception { assertTimeout(ofMillis(5000), () -> { // Instantiate a new executor and start a new 'null' task ... final ThreadAsyncExecutor executor = new ThreadAsyncExecutor(); final Object result = new Object(); final Callable task = mock(Callable.class); when(task.call()).thenAnswer(i -> { Thread.sleep(1500); return result; }); final AsyncCallback callback = mock(AsyncCallback.class); final AsyncResult asyncResult = executor.startProcess(task, callback); assertNotNull(asyncResult); assertFalse(asyncResult.isCompleted()); verifyZeroInteractions(callback); try { asyncResult.getValue(); fail("Expected IllegalStateException when calling AsyncResult#getValue on a non-completed task"); } catch (IllegalStateException e) { assertNotNull(e.getMessage()); } // Our task should only execute once, but it can take a while ... verify(task, timeout(3000).times(1)).call(); final ArgumentCaptor> optionalCaptor = ArgumentCaptor.forClass((Class) Optional.class); verify(callback, timeout(3000).times(1)).onComplete(eq(result), optionalCaptor.capture()); final Optional optionalException = optionalCaptor.getValue(); assertNotNull(optionalException); assertFalse(optionalException.isPresent()); // Prevent timing issues, and wait until the result is available asyncResult.await(); assertTrue(asyncResult.isCompleted()); verifyNoMoreInteractions(task, callback); // ... and the result should be exactly the same object assertSame(result, asyncResult.getValue()); }); } /** * Test used to verify the happy path of {@link ThreadAsyncExecutor#startProcess(Callable)} when a task takes a while * to execute, while waiting on the result using {@link ThreadAsyncExecutor#endProcess(AsyncResult)} */ @Test public void testEndProcess() throws Exception { assertTimeout(ofMillis(5000), () -> { // Instantiate a new executor and start a new 'null' task ... final ThreadAsyncExecutor executor = new ThreadAsyncExecutor(); final Object result = new Object(); final Callable task = mock(Callable.class); when(task.call()).thenAnswer(i -> { Thread.sleep(1500); return result; }); final AsyncResult asyncResult = executor.startProcess(task); assertNotNull(asyncResult); assertFalse(asyncResult.isCompleted()); try { asyncResult.getValue(); fail("Expected IllegalStateException when calling AsyncResult#getValue on a non-completed task"); } catch (IllegalStateException e) { assertNotNull(e.getMessage()); } assertSame(result, executor.endProcess(asyncResult)); verify(task, times(1)).call(); assertTrue(asyncResult.isCompleted()); // Calling end process a second time while already finished should give the same result assertSame(result, executor.endProcess(asyncResult)); verifyNoMoreInteractions(task); }); } /** * Test used to verify the behaviour of {@link ThreadAsyncExecutor#startProcess(Callable)} when the callable is 'null' */ @Test public void testNullTask() throws Exception { assertTimeout(ofMillis(3000), () -> { // Instantiate a new executor and start a new 'null' task ... final ThreadAsyncExecutor executor = new ThreadAsyncExecutor(); final AsyncResult asyncResult = executor.startProcess(null); assertNotNull(asyncResult, "The AsyncResult should not be 'null', even though the task was 'null'."); asyncResult.await(); // Prevent timing issues, and wait until the result is available assertTrue(asyncResult.isCompleted()); try { asyncResult.getValue(); fail("Expected ExecutionException with NPE as cause"); } catch (final ExecutionException e) { assertNotNull(e.getMessage()); assertNotNull(e.getCause()); assertEquals(NullPointerException.class, e.getCause().getClass()); } }); } /** * Test used to verify the behaviour of {@link ThreadAsyncExecutor#startProcess(Callable, AsyncCallback)} when the * callable is 'null', but the asynchronous callback is provided */ @Test public void testNullTaskWithCallback() throws Exception { assertTimeout(ofMillis(3000), () -> { // Instantiate a new executor and start a new 'null' task ... final ThreadAsyncExecutor executor = new ThreadAsyncExecutor(); final AsyncCallback callback = mock(AsyncCallback.class); final AsyncResult asyncResult = executor.startProcess(null, callback); assertNotNull(asyncResult, "The AsyncResult should not be 'null', even though the task was 'null'."); asyncResult.await(); // Prevent timing issues, and wait until the result is available assertTrue(asyncResult.isCompleted()); final ArgumentCaptor> optionalCaptor = ArgumentCaptor.forClass((Class) Optional.class); verify(callback, times(1)).onComplete(Matchers.isNull(), optionalCaptor.capture()); final Optional optionalException = optionalCaptor.getValue(); assertNotNull(optionalException); assertTrue(optionalException.isPresent()); final Exception exception = optionalException.get(); assertNotNull(exception); assertEquals(NullPointerException.class, exception.getClass()); try { asyncResult.getValue(); fail("Expected ExecutionException with NPE as cause"); } catch (final ExecutionException e) { assertNotNull(e.getMessage()); assertNotNull(e.getCause()); assertEquals(NullPointerException.class, e.getCause().getClass()); } }); } /** * Test used to verify the behaviour of {@link ThreadAsyncExecutor#startProcess(Callable, AsyncCallback)} when both * the callable and the asynchronous callback are 'null' */ @Test public void testNullTaskWithNullCallback() throws Exception { assertTimeout(ofMillis(3000), () -> { // Instantiate a new executor and start a new 'null' task ... final ThreadAsyncExecutor executor = new ThreadAsyncExecutor(); final AsyncResult asyncResult = executor.startProcess(null, null); assertNotNull( asyncResult, "The AsyncResult should not be 'null', even though the task and callback were 'null'." ); asyncResult.await(); // Prevent timing issues, and wait until the result is available assertTrue(asyncResult.isCompleted()); try { asyncResult.getValue(); fail("Expected ExecutionException with NPE as cause"); } catch (final ExecutionException e) { assertNotNull(e.getMessage()); assertNotNull(e.getCause()); assertEquals(NullPointerException.class, e.getCause().getClass()); } }); } }java-design-patterns-1.18.0/balking/000077500000000000000000000000001322244523500172405ustar00rootroot00000000000000java-design-patterns-1.18.0/balking/README.md000066400000000000000000000012021322244523500205120ustar00rootroot00000000000000--- layout: pattern title: Balking folder: balking permalink: /patterns/balking/ categories: Concurrency tags: - Java - Difficulty-Beginner --- ## Intent Balking Pattern is used to prevent an object from executing certain code if it is an incomplete or inappropriate state ![alt text](./etc/balking.png "Balking") ## Applicability Use the Balking pattern when * you want to invoke an action on an object only when it is in a particular state * objects are generally only in a state that is prone to balking temporarily but for an unknown amount of time ## Related patterns * Guarded Suspension Pattern * Double Checked Locking Pattern java-design-patterns-1.18.0/balking/etc/000077500000000000000000000000001322244523500200135ustar00rootroot00000000000000java-design-patterns-1.18.0/balking/etc/balking.png000066400000000000000000000516631322244523500221430ustar00rootroot00000000000000PNG  IHDR4SzIDATxXIǕ*E){(RE'zX`=l ＳﬨXO)!M(&qó-3;3cf7y$XD] H ^ +֋a0=^"O [EPB&AT 0@P-dAk<,\2JQAaBܗ8 PsZQO70 '(QB@[N+! $ܸ^M0.sOԬ硶щ/G‡kK+,ŗw??J!rHtkH-9SZ]{UDr)VN+XtZw΢zS 9Sgk_; 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&m [hw, 5GjkW1 N8kQ/KAXP;,O:n;G:&ArB|i  ;JKc 1 5Zuc59)ԗ5E_?4@`yGls %/rV] aA< 8Y:JH@lK,[KXR"uSGxjyg  /?}NE>"m6Xv%7Bm"5#lܠ&דd#JXyƒM.݈|Dl/K,kOPR{q'A aAApSbz9$ ^b;/llxJVrC;r)n ȂSJ0n3xe7_bIjnqm:laqdǃ <\޲>o-|IJ/$Dz5(~݅`DL%Yg+9X_AD{a%WdlWFGXec|EFL%Yg+9fK 24ř\l;wߦ3|r |O—Vuo`3@ ‚` aAA X`AXy#HR$+TIق@ P;A D $Zox`xIENDB`java-design-patterns-1.18.0/balking/etc/balking.ucls000066400000000000000000000060431322244523500223150ustar00rootroot00000000000000 java-design-patterns-1.18.0/balking/pom.xml000066400000000000000000000037001322244523500205550ustar00rootroot00000000000000 java-design-patterns com.iluwatar 1.18.0 4.0.0 balking org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/balking/src/000077500000000000000000000000001322244523500200275ustar00rootroot00000000000000java-design-patterns-1.18.0/balking/src/main/000077500000000000000000000000001322244523500207535ustar00rootroot00000000000000java-design-patterns-1.18.0/balking/src/main/java/000077500000000000000000000000001322244523500216745ustar00rootroot00000000000000java-design-patterns-1.18.0/balking/src/main/java/com/000077500000000000000000000000001322244523500224525ustar00rootroot00000000000000java-design-patterns-1.18.0/balking/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500243025ustar00rootroot00000000000000java-design-patterns-1.18.0/balking/src/main/java/com/iluwatar/balking/000077500000000000000000000000001322244523500257115ustar00rootroot00000000000000java-design-patterns-1.18.0/balking/src/main/java/com/iluwatar/balking/App.java000066400000000000000000000052631322244523500273020ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.balking; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; /** * In Balking Design Pattern if an object’s method is invoked when it is in an inappropriate state, * then the method will return without doing anything. Objects that use this pattern are generally only in a * state that is prone to balking temporarily but for an unknown amount of time * * In this example implementation WashingMachine is an object that has two states * in which it can be: ENABLED and WASHING. If the machine is ENABLED * the state is changed into WASHING that any other thread can't invoke this action on this and then do the job. * On the other hand if it have been already washing and any other thread execute wash() * it can't do that once again and returns doing nothing. */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * @param args the command line arguments - not used */ public static void main(String... args) { final WashingMachine washingMachine = new WashingMachine(); ExecutorService executorService = Executors.newFixedThreadPool(3); for (int i = 0; i < 3; i++) { executorService.execute(washingMachine::wash); } executorService.shutdown(); try { executorService.awaitTermination(10, TimeUnit.SECONDS); } catch (InterruptedException ie) { LOGGER.error("ERROR: Waiting on executor service shutdown!"); } } } java-design-patterns-1.18.0/balking/src/main/java/com/iluwatar/balking/WashingMachine.java000066400000000000000000000050371322244523500314460ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.balking; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Washing machine class */ public class WashingMachine { private static final Logger LOGGER = LoggerFactory.getLogger(WashingMachine.class); private WashingMachineState washingMachineState; public WashingMachine() { washingMachineState = WashingMachineState.ENABLED; } public WashingMachineState getWashingMachineState() { return washingMachineState; } /** * Method responsible for washing * if the object is in appropriate state */ public void wash() { synchronized (this) { LOGGER.info("{}: Actual machine state: {}", Thread.currentThread().getName(), getWashingMachineState()); if (washingMachineState == WashingMachineState.WASHING) { LOGGER.error("ERROR: Cannot wash if the machine has been already washing!"); return; } washingMachineState = WashingMachineState.WASHING; } LOGGER.info("{}: Doing the washing", Thread.currentThread().getName()); try { Thread.sleep(50); } catch (InterruptedException ie) { ie.printStackTrace(); } endOfWashing(); } /** * Method responsible of ending the washing * by changing machine state */ public synchronized void endOfWashing() { washingMachineState = WashingMachineState.ENABLED; LOGGER.info("{}: Washing completed.", Thread.currentThread().getId()); } } java-design-patterns-1.18.0/balking/src/main/java/com/iluwatar/balking/WashingMachineState.java000066400000000000000000000025411322244523500324440ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.balking; /** * WashingMachineState enum describes in which state machine is, * it can be enabled and ready to work as well as during washing */ public enum WashingMachineState { ENABLED, WASHING } java-design-patterns-1.18.0/balking/src/test/000077500000000000000000000000001322244523500210065ustar00rootroot00000000000000java-design-patterns-1.18.0/balking/src/test/java/000077500000000000000000000000001322244523500217275ustar00rootroot00000000000000java-design-patterns-1.18.0/balking/src/test/java/com/000077500000000000000000000000001322244523500225055ustar00rootroot00000000000000java-design-patterns-1.18.0/balking/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500243355ustar00rootroot00000000000000java-design-patterns-1.18.0/balking/src/test/java/com/iluwatar/balking/000077500000000000000000000000001322244523500257445ustar00rootroot00000000000000java-design-patterns-1.18.0/balking/src/test/java/com/iluwatar/balking/AppTest.java000066400000000000000000000025321322244523500301710ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.balking; import org.junit.jupiter.api.Test; /** * Application test */ public class AppTest { @Test public void main() throws Exception { String[] args = {}; App.main(args); } }java-design-patterns-1.18.0/balking/src/test/java/com/iluwatar/balking/WashingMachineTest.java000066400000000000000000000045351322244523500323430ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.balking; import org.junit.jupiter.api.Test; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Tests for {@link WashingMachine} */ public class WashingMachineTest { private volatile WashingMachineState machineStateGlobal; @Test public void wash() throws Exception { WashingMachine washingMachine = new WashingMachine(); ExecutorService executorService = Executors.newFixedThreadPool(2); executorService.execute(washingMachine::wash); executorService.execute(() -> { washingMachine.wash(); machineStateGlobal = washingMachine.getWashingMachineState(); }); executorService.shutdown(); try { executorService.awaitTermination(10, TimeUnit.SECONDS); } catch (InterruptedException ie) { ie.printStackTrace(); } assertEquals(WashingMachineState.WASHING, machineStateGlobal); } @Test public void endOfWashing() throws Exception { WashingMachine washingMachine = new WashingMachine(); washingMachine.wash(); assertEquals(WashingMachineState.ENABLED, washingMachine.getWashingMachineState()); } }java-design-patterns-1.18.0/bridge/000077500000000000000000000000001322244523500170655ustar00rootroot00000000000000java-design-patterns-1.18.0/bridge/README.md000066400000000000000000000121751322244523500203520ustar00rootroot00000000000000--- layout: pattern title: Bridge folder: bridge permalink: /patterns/bridge/ categories: Structural tags: - Java - Gang Of Four - Difficulty-Intermediate --- ## Also known as Handle/Body ## Intent Decouple an abstraction from its implementation so that the two can vary independently. ## Explanation Real world example > Consider you have a weapon with different enchantments and you are supposed to allow mixing different weapons with different enchantments. What would you do? Create multiple copies of each of the weapons for each of the enchantments or would you just create separate enchantment and set it for the weapon as needed? Bridge pattern allows you to do the second. In Plain Words > Bridge pattern is about preferring composition over inheritance. Implementation details are pushed from a hierarchy to another object with a separate hierarchy. Wikipedia says > The bridge pattern is a design pattern used in software engineering that is meant to "decouple an abstraction from its implementation so that the two can vary independently" **Programmatic Example** Translating our weapon example from above. Here we have the `Weapon` hierarchy ``` public interface Weapon { void wield(); void swing(); void unwield(); Enchantment getEnchantment(); } public class Sword implements Weapon { private final Enchantment enchantment; public Sword(Enchantment enchantment) { this.enchantment = enchantment; } @Override public void wield() { LOGGER.info("The sword is wielded."); enchantment.onActivate(); } @Override public void swing() { LOGGER.info("The sword is swinged."); enchantment.apply(); } @Override public void unwield() { LOGGER.info("The sword is unwielded."); enchantment.onDeactivate(); } @Override public Enchantment getEnchantment() { return enchantment; } } public class Hammer implements Weapon { private final Enchantment enchantment; public Hammer(Enchantment enchantment) { this.enchantment = enchantment; } @Override public void wield() { LOGGER.info("The hammer is wielded."); enchantment.onActivate(); } @Override public void swing() { LOGGER.info("The hammer is swinged."); enchantment.apply(); } @Override public void unwield() { LOGGER.info("The hammer is unwielded."); enchantment.onDeactivate(); } @Override public Enchantment getEnchantment() { return enchantment; } } ``` And the separate enchantment hierarchy ``` public interface Enchantment { void onActivate(); void apply(); void onDeactivate(); } public class FlyingEnchantment implements Enchantment { @Override public void onActivate() { LOGGER.info("The item begins to glow faintly."); } @Override public void apply() { LOGGER.info("The item flies and strikes the enemies finally returning to owner's hand."); } @Override public void onDeactivate() { LOGGER.info("The item's glow fades."); } } public class SoulEatingEnchantment implements Enchantment { @Override public void onActivate() { LOGGER.info("The item spreads bloodlust."); } @Override public void apply() { LOGGER.info("The item eats the soul of enemies."); } @Override public void onDeactivate() { LOGGER.info("Bloodlust slowly disappears."); } } ``` And both the hierarchies in action ``` Sword enchantedSword = new Sword(new SoulEatingEnchantment()); enchantedSword.wield(); enchantedSword.swing(); enchantedSword.unwield(); // The sword is wielded. // The item spreads bloodlust. // The sword is swinged. // The item eats the soul of enemies. // The sword is unwielded. // Bloodlust slowly disappears. Hammer hammer = new Hammer(new FlyingEnchantment()); hammer.wield(); hammer.swing(); hammer.unwield(); // The hammer is wielded. // The item begins to glow faintly. // The hammer is swinged. // The item flies and strikes the enemies finally returning to owner's hand. // The hammer is unwielded. // The item's glow fades. ``` ## Applicability Use the Bridge pattern when * you want to avoid a permanent binding between an abstraction and its implementation. This might be the case, for example, when the implementation must be selected or switched at run-time. * both the abstractions and their implementations should be extensible by subclassing. In this case, the Bridge pattern lets you combine the different abstractions and implementations and extend them independently * changes in the implementation of an abstraction should have no impact on clients; that is, their code should not have to be recompiled. * you have a proliferation of classes. Such a class hierarchy indicates the need for splitting an object into two parts. Rumbaugh uses the term "nested generalizations" to refer to such class hierarchies * you want to share an implementation among multiple objects (perhaps using reference counting), and this fact should be hidden from the client. A simple example is Coplien's String class, in which multiple objects can share the same string representation. ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.18.0/bridge/pom.xml000066400000000000000000000040611322244523500204030ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 bridge org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.mockito mockito-core test java-design-patterns-1.18.0/bridge/src/000077500000000000000000000000001322244523500176545ustar00rootroot00000000000000java-design-patterns-1.18.0/bridge/src/main/000077500000000000000000000000001322244523500206005ustar00rootroot00000000000000java-design-patterns-1.18.0/bridge/src/main/java/000077500000000000000000000000001322244523500215215ustar00rootroot00000000000000java-design-patterns-1.18.0/bridge/src/main/java/com/000077500000000000000000000000001322244523500222775ustar00rootroot00000000000000java-design-patterns-1.18.0/bridge/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500241275ustar00rootroot00000000000000java-design-patterns-1.18.0/bridge/src/main/java/com/iluwatar/bridge/000077500000000000000000000000001322244523500253635ustar00rootroot00000000000000java-design-patterns-1.18.0/bridge/src/main/java/com/iluwatar/bridge/App.java000066400000000000000000000047461322244523500267610ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.bridge; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Composition over inheritance. The Bridge pattern can also be thought of as two layers of abstraction. * With Bridge, you can decouple an abstraction from its implementation so that the two can vary independently. *

* In Bridge pattern both abstraction ({@link Weapon}) and implementation ( * {@link Enchantment}) have their own class hierarchies. The interface of the implementations * can be changed without affecting the clients. *

* In this example we have two class hierarchies. One of weapons and another one of enchantments. We can easily * combine any weapon with any enchantment using composition instead of creating deep class hierarchy. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args command line args */ public static void main(String[] args) { LOGGER.info("The knight receives an enchanted sword."); Sword enchantedSword = new Sword(new SoulEatingEnchantment()); enchantedSword.wield(); enchantedSword.swing(); enchantedSword.unwield(); LOGGER.info("The valkyrie receives an enchanted hammer."); Hammer hammer = new Hammer(new FlyingEnchantment()); hammer.wield(); hammer.swing(); hammer.unwield(); } } java-design-patterns-1.18.0/bridge/src/main/java/com/iluwatar/bridge/Enchantment.java000066400000000000000000000024261322244523500304760ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.bridge; /** * * Enchantment * */ public interface Enchantment { void onActivate(); void apply(); void onDeactivate(); } java-design-patterns-1.18.0/bridge/src/main/java/com/iluwatar/bridge/FlyingEnchantment.java000066400000000000000000000033161322244523500316460ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.bridge; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * FlyingEnchantment * */ public class FlyingEnchantment implements Enchantment { private static final Logger LOGGER = LoggerFactory.getLogger(FlyingEnchantment.class); @Override public void onActivate() { LOGGER.info("The item begins to glow faintly."); } @Override public void apply() { LOGGER.info("The item flies and strikes the enemies finally returning to owner's hand."); } @Override public void onDeactivate() { LOGGER.info("The item's glow fades."); } } java-design-patterns-1.18.0/bridge/src/main/java/com/iluwatar/bridge/Hammer.java000066400000000000000000000036111322244523500274400ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.bridge; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Hammer * */ public class Hammer implements Weapon { private static final Logger LOGGER = LoggerFactory.getLogger(Hammer.class); private final Enchantment enchantment; public Hammer(Enchantment enchantment) { this.enchantment = enchantment; } @Override public void wield() { LOGGER.info("The hammer is wielded."); enchantment.onActivate(); } @Override public void swing() { LOGGER.info("The hammer is swinged."); enchantment.apply(); } @Override public void unwield() { LOGGER.info("The hammer is unwielded."); enchantment.onDeactivate(); } @Override public Enchantment getEnchantment() { return enchantment; } } java-design-patterns-1.18.0/bridge/src/main/java/com/iluwatar/bridge/SoulEatingEnchantment.java000066400000000000000000000032641322244523500324720ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.bridge; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * SoulEatingEnchantment * */ public class SoulEatingEnchantment implements Enchantment { private static final Logger LOGGER = LoggerFactory.getLogger(SoulEatingEnchantment.class); @Override public void onActivate() { LOGGER.info("The item spreads bloodlust."); } @Override public void apply() { LOGGER.info("The item eats the soul of enemies."); } @Override public void onDeactivate() { LOGGER.info("Bloodlust slowly disappears."); } } java-design-patterns-1.18.0/bridge/src/main/java/com/iluwatar/bridge/Sword.java000066400000000000000000000036021322244523500273250ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.bridge; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Sword * */ public class Sword implements Weapon { private static final Logger LOGGER = LoggerFactory.getLogger(Sword.class); private final Enchantment enchantment; public Sword(Enchantment enchantment) { this.enchantment = enchantment; } @Override public void wield() { LOGGER.info("The sword is wielded."); enchantment.onActivate(); } @Override public void swing() { LOGGER.info("The sword is swinged."); enchantment.apply(); } @Override public void unwield() { LOGGER.info("The sword is unwielded."); enchantment.onDeactivate(); } @Override public Enchantment getEnchantment() { return enchantment; } } java-design-patterns-1.18.0/bridge/src/main/java/com/iluwatar/bridge/Weapon.java000066400000000000000000000024431322244523500274620ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.bridge; /** * * Weapon * */ public interface Weapon { void wield(); void swing(); void unwield(); Enchantment getEnchantment(); } java-design-patterns-1.18.0/bridge/src/test/000077500000000000000000000000001322244523500206335ustar00rootroot00000000000000java-design-patterns-1.18.0/bridge/src/test/java/000077500000000000000000000000001322244523500215545ustar00rootroot00000000000000java-design-patterns-1.18.0/bridge/src/test/java/com/000077500000000000000000000000001322244523500223325ustar00rootroot00000000000000java-design-patterns-1.18.0/bridge/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500241625ustar00rootroot00000000000000java-design-patterns-1.18.0/bridge/src/test/java/com/iluwatar/bridge/000077500000000000000000000000001322244523500254165ustar00rootroot00000000000000java-design-patterns-1.18.0/bridge/src/test/java/com/iluwatar/bridge/AppTest.java000066400000000000000000000025071322244523500276450ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.bridge; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/bridge/src/test/java/com/iluwatar/bridge/HammerTest.java000066400000000000000000000032241322244523500303330ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.bridge; import org.junit.jupiter.api.Test; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.spy; /** * Tests for hammer */ public class HammerTest extends WeaponTest { /** * Invoke all possible actions on the weapon and check if the actions are executed on the actual * underlying weapon implementation. */ @Test public void testHammer() throws Exception { final Hammer hammer = spy(new Hammer(mock(FlyingEnchantment.class))); testBasicWeaponActions(hammer); } }java-design-patterns-1.18.0/bridge/src/test/java/com/iluwatar/bridge/SwordTest.java000066400000000000000000000032151322244523500302200ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.bridge; import org.junit.jupiter.api.Test; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.spy; /** * Tests for sword */ public class SwordTest extends WeaponTest { /** * Invoke all possible actions on the weapon and check if the actions are executed on the actual * underlying weapon implementation. */ @Test public void testSword() throws Exception { final Sword sword = spy(new Sword(mock(FlyingEnchantment.class))); testBasicWeaponActions(sword); } }java-design-patterns-1.18.0/bridge/src/test/java/com/iluwatar/bridge/WeaponTest.java000066400000000000000000000041241322244523500303530ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.bridge; import org.junit.jupiter.api.Disabled; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Base class for weapon tests */ public abstract class WeaponTest { /** * Invoke the basic actions of the given weapon, and test if the underlying enchantment implementation * is invoked * */ protected final void testBasicWeaponActions(final Weapon weapon) { assertNotNull(weapon); Enchantment enchantment = weapon.getEnchantment(); assertNotNull(enchantment); assertNotNull(weapon.getEnchantment()); weapon.swing(); verify(enchantment).apply(); verifyNoMoreInteractions(enchantment); weapon.wield(); verify(enchantment).onActivate(); verifyNoMoreInteractions(enchantment); weapon.unwield(); verify(enchantment).onDeactivate(); verifyNoMoreInteractions(enchantment); } } java-design-patterns-1.18.0/builder/000077500000000000000000000000001322244523500172575ustar00rootroot00000000000000java-design-patterns-1.18.0/builder/.gitignore000066400000000000000000000000111322244523500212370ustar00rootroot00000000000000/target/ java-design-patterns-1.18.0/builder/README.md000066400000000000000000000111341322244523500205360ustar00rootroot00000000000000--- layout: pattern title: Builder folder: builder permalink: /patterns/builder/ categories: Creational tags: - Java - Gang Of Four - Difficulty-Intermediate --- ## Intent Separate the construction of a complex object from its representation so that the same construction process can create different representations. ## Explanation Real world example > Imagine a character generator for a role playing game. The easiest option is to let computer create the character for you. But if you want to select the character details like profession, gender, hair color etc. the character generation becomes a step-by-step process that completes when all the selections are ready. In plain words > Allows you to create different flavors of an object while avoiding constructor pollution. Useful when there could be several flavors of an object. Or when there are a lot of steps involved in creation of an object. Wikipedia says > The builder pattern is an object creation software design pattern with the intentions of finding a solution to the telescoping constructor anti-pattern. Having said that let me add a bit about what telescoping constructor anti-pattern is. At one point or the other we have all seen a constructor like below: ``` public Hero(Profession profession, String name, HairType hairType, HairColor hairColor, Armor armor, Weapon weapon) { } ``` As you can see the number of constructor parameters can quickly get out of hand and it might become difficult to understand the arrangement of parameters. Plus this parameter list could keep on growing if you would want to add more options in future. This is called telescoping constructor anti-pattern. **Programmatic Example** The sane alternative is to use the Builder pattern. First of all we have our hero that we want to create ``` public final class Hero { private final Profession profession; private final String name; private final HairType hairType; private final HairColor hairColor; private final Armor armor; private final Weapon weapon; private Hero(Builder builder) { this.profession = builder.profession; this.name = builder.name; this.hairColor = builder.hairColor; this.hairType = builder.hairType; this.weapon = builder.weapon; this.armor = builder.armor; } } ``` And then we have the builder ``` public static class Builder { private final Profession profession; private final String name; private HairType hairType; private HairColor hairColor; private Armor armor; private Weapon weapon; public Builder(Profession profession, String name) { if (profession == null || name == null) { throw new IllegalArgumentException("profession and name can not be null"); } this.profession = profession; this.name = name; } public Builder withHairType(HairType hairType) { this.hairType = hairType; return this; } public Builder withHairColor(HairColor hairColor) { this.hairColor = hairColor; return this; } public Builder withArmor(Armor armor) { this.armor = armor; return this; } public Builder withWeapon(Weapon weapon) { this.weapon = weapon; return this; } public Hero build() { return new Hero(this); } } ``` And then it can be used as: ``` Hero mage = new Hero.Builder(Profession.MAGE, "Riobard").withHairColor(HairColor.BLACK).withWeapon(Weapon.DAGGER).build(); ``` ## Applicability Use the Builder pattern when * the algorithm for creating a complex object should be independent of the parts that make up the object and how they're assembled * the construction process must allow different representations for the object that's constructed ## Real world examples * [java.lang.StringBuilder](http://docs.oracle.com/javase/8/docs/api/java/lang/StringBuilder.html) * [java.nio.ByteBuffer](http://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html#put-byte-) as well as similar buffers such as FloatBuffer, IntBuffer and so on. * [java.lang.StringBuffer](http://docs.oracle.com/javase/8/docs/api/java/lang/StringBuffer.html#append-boolean-) * All implementations of [java.lang.Appendable](http://docs.oracle.com/javase/8/docs/api/java/lang/Appendable.html) * [Apache Camel builders](https://github.com/apache/camel/tree/0e195428ee04531be27a0b659005e3aa8d159d23/camel-core/src/main/java/org/apache/camel/builder) ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) * [Effective Java (2nd Edition)](http://www.amazon.com/Effective-Java-Edition-Joshua-Bloch/dp/0321356683) java-design-patterns-1.18.0/builder/pom.xml000066400000000000000000000036441322244523500206030ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 builder org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/builder/src/000077500000000000000000000000001322244523500200465ustar00rootroot00000000000000java-design-patterns-1.18.0/builder/src/main/000077500000000000000000000000001322244523500207725ustar00rootroot00000000000000java-design-patterns-1.18.0/builder/src/main/java/000077500000000000000000000000001322244523500217135ustar00rootroot00000000000000java-design-patterns-1.18.0/builder/src/main/java/com/000077500000000000000000000000001322244523500224715ustar00rootroot00000000000000java-design-patterns-1.18.0/builder/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500243215ustar00rootroot00000000000000java-design-patterns-1.18.0/builder/src/main/java/com/iluwatar/builder/000077500000000000000000000000001322244523500257475ustar00rootroot00000000000000java-design-patterns-1.18.0/builder/src/main/java/com/iluwatar/builder/App.java000066400000000000000000000070321322244523500273340ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.builder; import com.iluwatar.builder.Hero.Builder; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * The intention of the Builder pattern is to find a solution to the telescoping constructor * anti-pattern. The telescoping constructor anti-pattern occurs when the increase of object * constructor parameter combination leads to an exponential list of constructors. Instead of using * numerous constructors, the builder pattern uses another object, a builder, that receives each * initialization parameter step by step and then returns the resulting constructed object at once. *

* The Builder pattern has another benefit. It can be used for objects that contain flat data (html * code, SQL query, X.509 certificate...), that is to say, data that can't be easily edited. This * type of data cannot be edited step by step and must be edited at once. The best way to construct * such an object is to use a builder class. *

* In this example we have the Builder pattern variation as described by Joshua Bloch in Effective * Java 2nd Edition. *

* We want to build {@link Hero} objects, but its construction is complex because of the many * parameters needed. To aid the user we introduce {@link Builder} class. {@link Hero.Builder} * takes the minimum parameters to build {@link Hero} object in its constructor. After that * additional configuration for the {@link Hero} object can be done using the fluent * {@link Builder} interface. When configuration is ready the build method is called to receive * the final {@link Hero} object. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args command line args */ public static void main(String[] args) { Hero mage = new Hero.Builder(Profession.MAGE, "Riobard").withHairColor(HairColor.BLACK) .withWeapon(Weapon.DAGGER).build(); LOGGER.info(mage.toString()); Hero warrior = new Hero.Builder(Profession.WARRIOR, "Amberjill").withHairColor(HairColor.BLOND) .withHairType(HairType.LONG_CURLY).withArmor(Armor.CHAIN_MAIL).withWeapon(Weapon.SWORD) .build(); LOGGER.info(warrior.toString()); Hero thief = new Hero.Builder(Profession.THIEF, "Desmond").withHairType(HairType.BALD) .withWeapon(Weapon.BOW).build(); LOGGER.info(thief.toString()); } } java-design-patterns-1.18.0/builder/src/main/java/com/iluwatar/builder/Armor.java000066400000000000000000000026771322244523500277060ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.builder; /** * * Armor enumeration * */ public enum Armor { CLOTHES("clothes"), LEATHER("leather"), CHAIN_MAIL("chain mail"), PLATE_MAIL("plate mail"); private String title; Armor(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.18.0/builder/src/main/java/com/iluwatar/builder/HairColor.java000066400000000000000000000025161322244523500305000ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.builder; /** * * HairColor enumeration * */ public enum HairColor { WHITE, BLOND, RED, BROWN, BLACK; @Override public String toString() { return name().toLowerCase(); } } java-design-patterns-1.18.0/builder/src/main/java/com/iluwatar/builder/HairType.java000066400000000000000000000027331322244523500303440ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.builder; /** * * HairType enumeration * */ public enum HairType { BALD("bald"), SHORT("short"), CURLY("curly"), LONG_STRAIGHT("long straight"), LONG_CURLY( "long curly"); private String title; HairType(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.18.0/builder/src/main/java/com/iluwatar/builder/Hero.java000066400000000000000000000073751322244523500275230ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.builder; /** * * Hero, the class with many parameters. * */ public final class Hero { private final Profession profession; private final String name; private final HairType hairType; private final HairColor hairColor; private final Armor armor; private final Weapon weapon; private Hero(Builder builder) { this.profession = builder.profession; this.name = builder.name; this.hairColor = builder.hairColor; this.hairType = builder.hairType; this.weapon = builder.weapon; this.armor = builder.armor; } public Profession getProfession() { return profession; } public String getName() { return name; } public HairType getHairType() { return hairType; } public HairColor getHairColor() { return hairColor; } public Armor getArmor() { return armor; } public Weapon getWeapon() { return weapon; } @Override public String toString() { StringBuilder sb = new StringBuilder(); sb.append("This is a ") .append(profession) .append(" named ") .append(name); if (hairColor != null || hairType != null) { sb.append(" with "); if (hairColor != null) { sb.append(hairColor).append(' '); } if (hairType != null) { sb.append(hairType).append(' '); } sb.append(hairType != HairType.BALD ? "hair" : "head"); } if (armor != null) { sb.append(" wearing ").append(armor); } if (weapon != null) { sb.append(" and wielding a ").append(weapon); } sb.append('.'); return sb.toString(); } /** * * The builder class. * */ public static class Builder { private final Profession profession; private final String name; private HairType hairType; private HairColor hairColor; private Armor armor; private Weapon weapon; /** * Constructor */ public Builder(Profession profession, String name) { if (profession == null || name == null) { throw new IllegalArgumentException("profession and name can not be null"); } this.profession = profession; this.name = name; } public Builder withHairType(HairType hairType) { this.hairType = hairType; return this; } public Builder withHairColor(HairColor hairColor) { this.hairColor = hairColor; return this; } public Builder withArmor(Armor armor) { this.armor = armor; return this; } public Builder withWeapon(Weapon weapon) { this.weapon = weapon; return this; } public Hero build() { return new Hero(this); } } } java-design-patterns-1.18.0/builder/src/main/java/com/iluwatar/builder/Profession.java000066400000000000000000000025141322244523500307430ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.builder; /** * * Profession enumeration * */ public enum Profession { WARRIOR, THIEF, MAGE, PRIEST; @Override public String toString() { return name().toLowerCase(); } } java-design-patterns-1.18.0/builder/src/main/java/com/iluwatar/builder/Weapon.java000066400000000000000000000025121322244523500300430ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.builder; /** * * Weapon enumeration * */ public enum Weapon { DAGGER, SWORD, AXE, WARHAMMER, BOW; @Override public String toString() { return name().toLowerCase(); } } java-design-patterns-1.18.0/builder/src/test/000077500000000000000000000000001322244523500210255ustar00rootroot00000000000000java-design-patterns-1.18.0/builder/src/test/java/000077500000000000000000000000001322244523500217465ustar00rootroot00000000000000java-design-patterns-1.18.0/builder/src/test/java/com/000077500000000000000000000000001322244523500225245ustar00rootroot00000000000000java-design-patterns-1.18.0/builder/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500243545ustar00rootroot00000000000000java-design-patterns-1.18.0/builder/src/test/java/com/iluwatar/builder/000077500000000000000000000000001322244523500260025ustar00rootroot00000000000000java-design-patterns-1.18.0/builder/src/test/java/com/iluwatar/builder/AppTest.java000066400000000000000000000025101322244523500302230ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.builder; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/builder/src/test/java/com/iluwatar/builder/HeroTest.java000066400000000000000000000054531322244523500304110ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.builder; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertThrows; /** * Date: 12/6/15 - 11:01 PM * * @author Jeroen Meulemeester */ public class HeroTest { /** * Test if we get the expected exception when trying to create a hero without a profession */ @Test public void testMissingProfession() throws Exception { assertThrows(IllegalArgumentException.class, () -> new Hero.Builder(null, "Sir without a job")); } /** * Test if we get the expected exception when trying to create a hero without a name */ @Test public void testMissingName() throws Exception { assertThrows(IllegalArgumentException.class, () -> new Hero.Builder(Profession.THIEF, null)); } /** * Test if the hero build by the builder has the correct attributes, as requested */ @Test public void testBuildHero() throws Exception { final String heroName = "Sir Lancelot"; final Hero hero = new Hero.Builder(Profession.WARRIOR, heroName) .withArmor(Armor.CHAIN_MAIL) .withWeapon(Weapon.SWORD) .withHairType(HairType.LONG_CURLY) .withHairColor(HairColor.BLOND) .build(); assertNotNull(hero); assertNotNull(hero.toString()); assertEquals(Profession.WARRIOR, hero.getProfession()); assertEquals(heroName, hero.getName()); assertEquals(Armor.CHAIN_MAIL, hero.getArmor()); assertEquals(Weapon.SWORD, hero.getWeapon()); assertEquals(HairType.LONG_CURLY, hero.getHairType()); assertEquals(HairColor.BLOND, hero.getHairColor()); } }java-design-patterns-1.18.0/business-delegate/000077500000000000000000000000001322244523500212345ustar00rootroot00000000000000java-design-patterns-1.18.0/business-delegate/README.md000066400000000000000000000016201322244523500225120ustar00rootroot00000000000000--- layout: pattern title: Business Delegate folder: business-delegate permalink: /patterns/business-delegate/ categories: Business Tier tags: - Java - Difficulty-Intermediate --- ## Intent The Business Delegate pattern adds an abstraction layer between presentation and business tiers. By using the pattern we gain loose coupling between the tiers and encapsulate knowledge about how to locate, connect to, and interact with the business objects that make up the application. ![alt text](./etc/business-delegate.png "Business Delegate") ## Applicability Use the Business Delegate pattern when * you want loose coupling between presentation and business tiers * you want to orchestrate calls to multiple business services * you want to encapsulate service lookups and service calls ## Credits * [J2EE Design Patterns](http://www.amazon.com/J2EE-Design-Patterns-William-Crawford/dp/0596004273/ref=sr_1_2) java-design-patterns-1.18.0/business-delegate/etc/000077500000000000000000000000001322244523500220075ustar00rootroot00000000000000java-design-patterns-1.18.0/business-delegate/etc/business-delegate.png000066400000000000000000000573331322244523500261330ustar00rootroot00000000000000PNG  IHDRl^IDATxm\ř.Xj7qxcP K@Zt JK- -um`$ڱt+fba7BĎufڬoTe9OTʓ'O73W `  Bm536@MtY;.e` ;B>TH -BNlRwB` }TTS~1ZsC PV!4f,DB> *:%VCMM{1ӜZ6Al`Wt@#lMyqscp=)nG:q#9$(7҅CP, &uK$qdJcq¢< jEY7RDT5j w&Uf$ !Qr@] T"mIsTv3\#:ЇҤʃ OY0(rtiiwB-#E qHލr q!ܟ#j^K0ftL0>4K0 f &L&I2sd@B=lq"I8U4ϑqP!jP!j* PP!u'T ;B>TH -BNlRwB` }_U7o~b6m8P!jKG]OLdW2RN,>bB` }T{gv_}_|l {?rUI?Z rwuP!j3rO~kN>Wy^+mf:-DC cұG̿z[9s?;v={q|!|?',hѦIřBp}T5nkOwƟbȯ`KOx[Y(~(VNNW[FѤsP!ŀL\oo\3{ ;/?v}b\&}YbQ+lLc#\[vby'y_^Ζ~(=2ܙ *}T/kq}~gOv|,%HRѩqN "{@l ]smݾvɎY"A"tT*z5f Vl ]3=r[۟coc> -|U!`Y PP!u'T ;B>TH -BNlRwB` }*[@@ԝP!j6*5LGLy B` }ڨP!"B>*$و.% ]nG4'\zǤ\ "qoh^H|_fLn^C/}6inm5V*[@8B8AN+,u@k.  q @.IeɁr6R P#i&?,'…{皪{*4|jf\)g}证 PۡApB"|F}B JgduP!jab(V{xA"H&?jDJ$ Pyh-׌ WpqQ \ƷC\4Y -U!KdLH(21R5DHRo3_i2V,T}U8 B` }*[@@ԝP!j* PP!u'T ;B>@wŊ6m  ;` }*[@@ԝP!j* PZw`t*Rw6 PP!u'T ;B>@!ҽ?'ϭ7`) PTn 쯎'X B>@a]j'T(C,O5y9.pk?5IFִ VF~2˶H7JP!j`Fڎl7c!2H*_; y)Ki5Z"*[@䨐]uwtѩVVhza(ODe(^NSJ8TR!w-ϴ^|#f+w]^KTK8$8nI/N@ߜl7cA?P3&ZI2S:~|xZSf,'$QlP!j@Bv慉g_?M^5*dҎ.?0hA#h ƅ47Iz̵IV)&3Ix$Agߗ '2)!*Ъm;o;Wؿ Rp s(ͰBvWKJ';qUh__!eGE R PZCo{fb{b+ Uy7 IZbCin 'I2i|֓!D&FBp } ~uGn93Lu,0Ȃ)*D+/ `W!@LݻN=eg"{ղ #[dj!F zS-92Q2IM\(>>ytxGO:}msdI1#[@xn^H9(X/ǀ@k֍dOک>*sx2AS -P!-BNlRwB` }*[@@ԝP!jD_Ђ Ȥzn2wVz/B>HTHNK I-1g B>@ up;;(.UhP!Cj KlݷX IJs,1>,U'TЪ/=ya׏<¾@1krmɵ\`ވ5DMuq^RTƴB } 澳}eB4$:AH^( Fm~zb_…DbIKg-B0PZCo{fb{b+ ysE!aL''7:PBbHwCf,,%Tj@Bݑ[<}3`8  7%[ۑHGR!5N|!P!>@ԫwnxd;`_8 NuZ/^JH%lt4&c%rfup.;Ľ*T92A?Kt4 F;G&/#eLNQ>YNl \/F PaZ#B` }U7~ -V! 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.business.delegate; /** * The Business Delegate pattern adds an abstraction layer between the presentation and business * tiers. By using the pattern we gain loose coupling between the tiers. The Business Delegate * encapsulates knowledge about how to locate, connect to, and interact with the business objects * that make up the application. * *

Some of the services the Business Delegate uses are instantiated directly, and some can be * retrieved through service lookups. The Business Delegate itself may contain business logic too * potentially tying together multiple service calls, exception handling, retrying etc. * *

In this example the client ({@link Client}) utilizes a business delegate ( * {@link BusinessDelegate}) to execute a task. The Business Delegate then selects the appropriate * service and makes the service call. */ public class App { /** * Program entry point. * * @param args command line args */ public static void main(String[] args) { BusinessDelegate businessDelegate = new BusinessDelegate(); BusinessLookup businessLookup = new BusinessLookup(); businessLookup.setEjbService(new EjbService()); businessLookup.setJmsService(new JmsService()); businessDelegate.setLookupService(businessLookup); businessDelegate.setServiceType(ServiceType.EJB); Client client = new Client(businessDelegate); client.doTask(); businessDelegate.setServiceType(ServiceType.JMS); client.doTask(); } } BusinessDelegate.java000066400000000000000000000033331322244523500357170ustar00rootroot00000000000000java-design-patterns-1.18.0/business-delegate/src/main/java/com/iluwatar/business/delegate/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.business.delegate; /** * BusinessDelegate separates the presentation and business tiers */ public class BusinessDelegate { private BusinessLookup lookupService; private BusinessService businessService; private ServiceType serviceType; public void setLookupService(BusinessLookup businessLookup) { this.lookupService = businessLookup; } public void setServiceType(ServiceType serviceType) { this.serviceType = serviceType; } public void doTask() { businessService = lookupService.getBusinessService(serviceType); businessService.doProcessing(); } } BusinessLookup.java000066400000000000000000000034331322244523500354570ustar00rootroot00000000000000java-design-patterns-1.18.0/business-delegate/src/main/java/com/iluwatar/business/delegate/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.business.delegate; /** * Class for performing service lookups. */ public class BusinessLookup { private EjbService ejbService; private JmsService jmsService; /** * @param serviceType Type of service instance to be returned. * @return Service instance. */ public BusinessService getBusinessService(ServiceType serviceType) { if (serviceType.equals(ServiceType.EJB)) { return ejbService; } else { return jmsService; } } public void setJmsService(JmsService jmsService) { this.jmsService = jmsService; } public void setEjbService(EjbService ejbService) { this.ejbService = ejbService; } } BusinessService.java000066400000000000000000000024271322244523500356100ustar00rootroot00000000000000java-design-patterns-1.18.0/business-delegate/src/main/java/com/iluwatar/business/delegate/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.business.delegate; /** * * Interface for service implementations * */ public interface BusinessService { void doProcessing(); } Client.java000066400000000000000000000027321322244523500337110ustar00rootroot00000000000000java-design-patterns-1.18.0/business-delegate/src/main/java/com/iluwatar/business/delegate/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.business.delegate; /** * * Client utilizes BusinessDelegate to call the business tier * */ public class Client { private BusinessDelegate businessDelegate; public Client(BusinessDelegate businessDelegate) { this.businessDelegate = businessDelegate; } public void doTask() { businessDelegate.doTask(); } } EjbService.java000066400000000000000000000027641322244523500345210ustar00rootroot00000000000000java-design-patterns-1.18.0/business-delegate/src/main/java/com/iluwatar/business/delegate/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.business.delegate; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Service EJB implementation * */ public class EjbService implements BusinessService { private static final Logger LOGGER = LoggerFactory.getLogger(EjbService.class); @Override public void doProcessing() { LOGGER.info("EjbService is now processing"); } } JmsService.java000066400000000000000000000027641322244523500345520ustar00rootroot00000000000000java-design-patterns-1.18.0/business-delegate/src/main/java/com/iluwatar/business/delegate/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.business.delegate; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Service JMS implementation * */ public class JmsService implements BusinessService { private static final Logger LOGGER = LoggerFactory.getLogger(JmsService.class); @Override public void doProcessing() { LOGGER.info("JmsService is now processing"); } } ServiceType.java000066400000000000000000000023731322244523500347360ustar00rootroot00000000000000java-design-patterns-1.18.0/business-delegate/src/main/java/com/iluwatar/business/delegate/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.business.delegate; /** * * Enumeration for service types * */ public enum ServiceType { EJB, JMS; } java-design-patterns-1.18.0/business-delegate/src/test/000077500000000000000000000000001322244523500230025ustar00rootroot00000000000000java-design-patterns-1.18.0/business-delegate/src/test/java/000077500000000000000000000000001322244523500237235ustar00rootroot00000000000000java-design-patterns-1.18.0/business-delegate/src/test/java/com/000077500000000000000000000000001322244523500245015ustar00rootroot00000000000000java-design-patterns-1.18.0/business-delegate/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500263315ustar00rootroot00000000000000java-design-patterns-1.18.0/business-delegate/src/test/java/com/iluwatar/business/000077500000000000000000000000001322244523500301645ustar00rootroot00000000000000java-design-patterns-1.18.0/business-delegate/src/test/java/com/iluwatar/business/delegate/000077500000000000000000000000001322244523500317365ustar00rootroot00000000000000AppTest.java000066400000000000000000000026431322244523500341070ustar00rootroot00000000000000java-design-patterns-1.18.0/business-delegate/src/test/java/com/iluwatar/business/delegate/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.business.delegate; import org.junit.jupiter.api.Test; import java.io.IOException; /** * Tests that Business Delegate example runs without errors. */ public class AppTest { @Test public void test() throws IOException { String[] args = {}; App.main(args); } } BusinessDelegateTest.java000066400000000000000000000071021322244523500366100ustar00rootroot00000000000000java-design-patterns-1.18.0/business-delegate/src/test/java/com/iluwatar/business/delegate/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.business.delegate; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import static org.mockito.Mockito.spy; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; /** * The Business Delegate pattern adds an abstraction layer between the presentation and business * tiers. By using the pattern we gain loose coupling between the tiers. The Business Delegate * encapsulates knowledge about how to locate, connect to, and interact with the business objects * that make up the application. * *

Some of the services the Business Delegate uses are instantiated directly, and some can be * retrieved through service lookups. The Business Delegate itself may contain business logic too * potentially tying together multiple service calls, exception handling, retrying etc. */ public class BusinessDelegateTest { private EjbService ejbService; private JmsService jmsService; private BusinessLookup businessLookup; private BusinessDelegate businessDelegate; /** * This method sets up the instance variables of this test class. It is executed before the * execution of every test. */ @BeforeEach public void setup() { ejbService = spy(new EjbService()); jmsService = spy(new JmsService()); businessLookup = spy(new BusinessLookup()); businessLookup.setEjbService(ejbService); businessLookup.setJmsService(jmsService); businessDelegate = spy(new BusinessDelegate()); businessDelegate.setLookupService(businessLookup); } /** * In this example the client ({@link Client}) utilizes a business delegate ( * {@link BusinessDelegate}) to execute a task. The Business Delegate then selects the appropriate * service and makes the service call. */ @Test public void testBusinessDelegate() { // setup a client object Client client = new Client(businessDelegate); // set the service type businessDelegate.setServiceType(ServiceType.EJB); // action client.doTask(); // verifying that the businessDelegate was used by client during doTask() method. verify(businessDelegate).doTask(); verify(ejbService).doProcessing(); // set the service type businessDelegate.setServiceType(ServiceType.JMS); // action client.doTask(); // verifying that the businessDelegate was used by client during doTask() method. verify(businessDelegate, times(2)).doTask(); verify(jmsService).doProcessing(); } } java-design-patterns-1.18.0/caching/000077500000000000000000000000001322244523500172255ustar00rootroot00000000000000java-design-patterns-1.18.0/caching/.gitignore000066400000000000000000000000111322244523500212050ustar00rootroot00000000000000/target/ java-design-patterns-1.18.0/caching/README.md000066400000000000000000000017631322244523500205130ustar00rootroot00000000000000--- layout: pattern title: Caching folder: caching permalink: /patterns/caching/ categories: Other tags: - Java - Difficulty-Intermediate - Performance --- ## Intent To avoid expensive re-acquisition of resources by not releasing the resources immediately after their use. The resources retain their identity, are kept in some fast-access storage, and are re-used to avoid having to acquire them again. ![alt text](./etc/caching.png "Caching") ## Applicability Use the Caching pattern(s) when * Repetitious acquisition, initialization, and release of the same resource causes unnecessary performance overhead. ## Credits * [Write-through, write-around, write-back: Cache explained](http://www.computerweekly.com/feature/Write-through-write-around-write-back-Cache-explained) * [Read-Through, Write-Through, Write-Behind, and Refresh-Ahead Caching](https://docs.oracle.com/cd/E15357_01/coh.360/e15723/cache_rtwtwbra.htm#COHDG5177) * [Cache-Aside](https://msdn.microsoft.com/en-us/library/dn589799.aspx) java-design-patterns-1.18.0/caching/etc/000077500000000000000000000000001322244523500200005ustar00rootroot00000000000000java-design-patterns-1.18.0/caching/etc/caching.png000066400000000000000000003402371322244523500221130ustar00rootroot00000000000000PNG  IHDRWm| [fIDATx |Ch*ĕgSJ]J\![!A,)![WUCuUyzwIw߼|~3;;;;}wgF@ (P@k 6. 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.caching; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * The Caching pattern describes how to avoid expensive re-acquisition of resources by not releasing * the resources immediately after their use. The resources retain their identity, are kept in some * fast-access storage, and are re-used to avoid having to acquire them again. There are four main * caching strategies/techniques in this pattern; each with their own pros and cons. They are; * write-through which writes data to the cache and DB in a single transaction, * write-around which writes data immediately into the DB instead of the cache, * write-behind which writes data into the cache initially whilst the data is only * written into the DB when the cache is full, and cache-aside which pushes the * responsibility of keeping the data synchronized in both data sources to the application itself. * The read-through strategy is also included in the mentioned four strategies -- * returns data from the cache to the caller if it exists else queries from DB and * stores it into the cache for future use. These strategies determine when the data in the cache * should be written back to the backing store (i.e. Database) and help keep both data sources * synchronized/up-to-date. This pattern can improve performance and also helps to maintain * consistency between data held in the cache and the data in the underlying data store. *

* In this example, the user account ({@link UserAccount}) entity is used as the underlying * application data. The cache itself is implemented as an internal (Java) data structure. It adopts * a Least-Recently-Used (LRU) strategy for evicting data from itself when its full. The four * strategies are individually tested. The testing of the cache is restricted towards saving and * querying of user accounts from the underlying data store ( {@link DbManager}). The main class ( * {@link App} is not aware of the underlying mechanics of the application (i.e. save and query) and * whether the data is coming from the cache or the DB (i.e. separation of concern). The AppManager * ({@link AppManager}) handles the transaction of data to-and-from the underlying data store * (depending on the preferred caching policy/strategy). * * App --> AppManager --> CacheStore/LRUCache/CachingPolicy --> DBManager *

* * @see CacheStore * @See LRUCache * @see CachingPolicy * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args command line args */ public static void main(String[] args) { AppManager.initDb(false); // VirtualDB (instead of MongoDB) was used in running the JUnit tests // and the App class to avoid Maven compilation errors. Set flag to // true to run the tests with MongoDB (provided that MongoDB is // installed and socket connection is open). AppManager.initCacheCapacity(3); App app = new App(); app.useReadAndWriteThroughStrategy(); app.useReadThroughAndWriteAroundStrategy(); app.useReadThroughAndWriteBehindStrategy(); app.useCacheAsideStategy(); } /** * Read-through and write-through */ public void useReadAndWriteThroughStrategy() { LOGGER.info("# CachingPolicy.THROUGH"); AppManager.initCachingPolicy(CachingPolicy.THROUGH); UserAccount userAccount1 = new UserAccount("001", "John", "He is a boy."); AppManager.save(userAccount1); LOGGER.info(AppManager.printCacheContent()); AppManager.find("001"); AppManager.find("001"); } /** * Read-through and write-around */ public void useReadThroughAndWriteAroundStrategy() { LOGGER.info("# CachingPolicy.AROUND"); AppManager.initCachingPolicy(CachingPolicy.AROUND); UserAccount userAccount2 = new UserAccount("002", "Jane", "She is a girl."); AppManager.save(userAccount2); LOGGER.info(AppManager.printCacheContent()); AppManager.find("002"); LOGGER.info(AppManager.printCacheContent()); userAccount2 = AppManager.find("002"); userAccount2.setUserName("Jane G."); AppManager.save(userAccount2); LOGGER.info(AppManager.printCacheContent()); AppManager.find("002"); LOGGER.info(AppManager.printCacheContent()); AppManager.find("002"); } /** * Read-through and write-behind */ public void useReadThroughAndWriteBehindStrategy() { LOGGER.info("# CachingPolicy.BEHIND"); AppManager.initCachingPolicy(CachingPolicy.BEHIND); UserAccount userAccount3 = new UserAccount("003", "Adam", "He likes food."); UserAccount userAccount4 = new UserAccount("004", "Rita", "She hates cats."); UserAccount userAccount5 = new UserAccount("005", "Isaac", "He is allergic to mustard."); AppManager.save(userAccount3); AppManager.save(userAccount4); AppManager.save(userAccount5); LOGGER.info(AppManager.printCacheContent()); AppManager.find("003"); LOGGER.info(AppManager.printCacheContent()); UserAccount userAccount6 = new UserAccount("006", "Yasha", "She is an only child."); AppManager.save(userAccount6); LOGGER.info(AppManager.printCacheContent()); AppManager.find("004"); LOGGER.info(AppManager.printCacheContent()); } /** * Cache-Aside */ public void useCacheAsideStategy() { LOGGER.info("# CachingPolicy.ASIDE"); AppManager.initCachingPolicy(CachingPolicy.ASIDE); LOGGER.info(AppManager.printCacheContent()); UserAccount userAccount3 = new UserAccount("003", "Adam", "He likes food."); UserAccount userAccount4 = new UserAccount("004", "Rita", "She hates cats."); UserAccount userAccount5 = new UserAccount("005", "Isaac", "He is allergic to mustard."); AppManager.save(userAccount3); AppManager.save(userAccount4); AppManager.save(userAccount5); LOGGER.info(AppManager.printCacheContent()); AppManager.find("003"); LOGGER.info(AppManager.printCacheContent()); AppManager.find("004"); LOGGER.info(AppManager.printCacheContent()); } } java-design-patterns-1.18.0/caching/src/main/java/com/iluwatar/caching/AppManager.java000066400000000000000000000102021322244523500305340ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.caching; import java.text.ParseException; /** * * AppManager helps to bridge the gap in communication between the main class and the application's * back-end. DB connection is initialized through this class. The chosen caching strategy/policy is * also initialized here. Before the cache can be used, the size of the cache has to be set. * Depending on the chosen caching policy, AppManager will call the appropriate function in the * CacheStore class. * */ public final class AppManager { private static CachingPolicy cachingPolicy; private AppManager() { } /** * * Developer/Tester is able to choose whether the application should use MongoDB as its underlying * data storage or a simple Java data structure to (temporarily) store the data/objects during * runtime. */ public static void initDb(boolean useMongoDb) { if (useMongoDb) { try { DbManager.connect(); } catch (ParseException e) { e.printStackTrace(); } } else { DbManager.createVirtualDb(); } } /** * Initialize caching policy */ public static void initCachingPolicy(CachingPolicy policy) { cachingPolicy = policy; if (cachingPolicy == CachingPolicy.BEHIND) { Runtime.getRuntime().addShutdownHook(new Thread(CacheStore::flushCache)); } CacheStore.clearCache(); } public static void initCacheCapacity(int capacity) { CacheStore.initCapacity(capacity); } /** * Find user account */ public static UserAccount find(String userId) { if (cachingPolicy == CachingPolicy.THROUGH || cachingPolicy == CachingPolicy.AROUND) { return CacheStore.readThrough(userId); } else if (cachingPolicy == CachingPolicy.BEHIND) { return CacheStore.readThroughWithWriteBackPolicy(userId); } else if (cachingPolicy == CachingPolicy.ASIDE) { return findAside(userId); } return null; } /** * Save user account */ public static void save(UserAccount userAccount) { if (cachingPolicy == CachingPolicy.THROUGH) { CacheStore.writeThrough(userAccount); } else if (cachingPolicy == CachingPolicy.AROUND) { CacheStore.writeAround(userAccount); } else if (cachingPolicy == CachingPolicy.BEHIND) { CacheStore.writeBehind(userAccount); } else if (cachingPolicy == CachingPolicy.ASIDE) { saveAside(userAccount); } } public static String printCacheContent() { return CacheStore.print(); } /** * Cache-Aside save user account helper */ private static void saveAside(UserAccount userAccount) { DbManager.updateDb(userAccount); CacheStore.invalidate(userAccount.getUserId()); } /** * Cache-Aside find user account helper */ private static UserAccount findAside(String userId) { UserAccount userAccount = CacheStore.get(userId); if (userAccount != null) { return userAccount; } userAccount = DbManager.readFromDb(userId); if (userAccount != null) { CacheStore.set(userId, userAccount); } return userAccount; } } java-design-patterns-1.18.0/caching/src/main/java/com/iluwatar/caching/CacheStore.java000066400000000000000000000120711322244523500305470ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.caching; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.List; /** * * The caching strategies are implemented in this class. * */ public class CacheStore { private static final Logger LOGGER = LoggerFactory.getLogger(CacheStore.class); static LruCache cache; private CacheStore() { } /** * Init cache capacity */ public static void initCapacity(int capacity) { if (cache == null) { cache = new LruCache(capacity); } else { cache.setCapacity(capacity); } } /** * Get user account using read-through cache */ public static UserAccount readThrough(String userId) { if (cache.contains(userId)) { LOGGER.info("# Cache Hit!"); return cache.get(userId); } LOGGER.info("# Cache Miss!"); UserAccount userAccount = DbManager.readFromDb(userId); cache.set(userId, userAccount); return userAccount; } /** * Get user account using write-through cache */ public static void writeThrough(UserAccount userAccount) { if (cache.contains(userAccount.getUserId())) { DbManager.updateDb(userAccount); } else { DbManager.writeToDb(userAccount); } cache.set(userAccount.getUserId(), userAccount); } /** * Get user account using write-around cache */ public static void writeAround(UserAccount userAccount) { if (cache.contains(userAccount.getUserId())) { DbManager.updateDb(userAccount); cache.invalidate(userAccount.getUserId()); // Cache data has been updated -- remove older // version from cache. } else { DbManager.writeToDb(userAccount); } } /** * Get user account using read-through cache with write-back policy */ public static UserAccount readThroughWithWriteBackPolicy(String userId) { if (cache.contains(userId)) { LOGGER.info("# Cache Hit!"); return cache.get(userId); } LOGGER.info("# Cache Miss!"); UserAccount userAccount = DbManager.readFromDb(userId); if (cache.isFull()) { LOGGER.info("# Cache is FULL! Writing LRU data to DB..."); UserAccount toBeWrittenToDb = cache.getLruData(); DbManager.upsertDb(toBeWrittenToDb); } cache.set(userId, userAccount); return userAccount; } /** * Set user account */ public static void writeBehind(UserAccount userAccount) { if (cache.isFull() && !cache.contains(userAccount.getUserId())) { LOGGER.info("# Cache is FULL! Writing LRU data to DB..."); UserAccount toBeWrittenToDb = cache.getLruData(); DbManager.upsertDb(toBeWrittenToDb); } cache.set(userAccount.getUserId(), userAccount); } /** * Clears cache */ public static void clearCache() { if (cache != null) { cache.clear(); } } /** * Writes remaining content in the cache into the DB. */ public static void flushCache() { LOGGER.info("# flushCache..."); if (null == cache) { return; } List listOfUserAccounts = cache.getCacheDataInListForm(); for (UserAccount userAccount : listOfUserAccounts) { DbManager.upsertDb(userAccount); } } /** * Print user accounts */ public static String print() { List listOfUserAccounts = cache.getCacheDataInListForm(); StringBuilder sb = new StringBuilder(); sb.append("\n--CACHE CONTENT--\n"); for (UserAccount userAccount : listOfUserAccounts) { sb.append(userAccount.toString() + "\n"); } sb.append("----\n"); return sb.toString(); } /** * Delegate to backing cache store */ public static UserAccount get(String userId) { return cache.get(userId); } /** * Delegate to backing cache store */ public static void set(String userId, UserAccount userAccount) { cache.set(userId, userAccount); } /** * Delegate to backing cache store */ public static void invalidate(String userId) { cache.invalidate(userId); } } java-design-patterns-1.18.0/caching/src/main/java/com/iluwatar/caching/CachingPolicy.java000066400000000000000000000027671322244523500312560ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.caching; /** * * Enum class containing the four caching strategies implemented in the pattern. * */ public enum CachingPolicy { THROUGH("through"), AROUND("around"), BEHIND("behind"), ASIDE("aside"); private String policy; private CachingPolicy(String policy) { this.policy = policy; } public String getPolicy() { return policy; } } java-design-patterns-1.18.0/caching/src/main/java/com/iluwatar/caching/DbManager.java000066400000000000000000000116541322244523500303550ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.caching; import java.text.ParseException; import java.util.HashMap; import java.util.Map; import org.bson.Document; import com.mongodb.MongoClient; import com.mongodb.client.FindIterable; import com.mongodb.client.MongoDatabase; import com.mongodb.client.model.UpdateOptions; /** * *

DBManager handles the communication with the underlying data store i.e. Database. It contains the * implemented methods for querying, inserting, and updating data. MongoDB was used as the database * for the application.

* *

Developer/Tester is able to choose whether the application should use MongoDB as its underlying * data storage (connect()) or a simple Java data structure to (temporarily) store the data/objects * during runtime (createVirtualDB()).

* */ public final class DbManager { private static MongoClient mongoClient; private static MongoDatabase db; private static boolean useMongoDB; private static Map virtualDB; private DbManager() { } /** * Create DB */ public static void createVirtualDb() { useMongoDB = false; virtualDB = new HashMap<>(); } /** * Connect to DB */ public static void connect() throws ParseException { useMongoDB = true; mongoClient = new MongoClient(); db = mongoClient.getDatabase("test"); } /** * Read user account from DB */ public static UserAccount readFromDb(String userId) { if (!useMongoDB) { if (virtualDB.containsKey(userId)) { return virtualDB.get(userId); } return null; } if (db == null) { try { connect(); } catch (ParseException e) { e.printStackTrace(); } } FindIterable iterable = db.getCollection("user_accounts").find(new Document("userID", userId)); if (iterable == null) { return null; } Document doc = iterable.first(); return new UserAccount(userId, doc.getString("userName"), doc.getString("additionalInfo")); } /** * Write user account to DB */ public static void writeToDb(UserAccount userAccount) { if (!useMongoDB) { virtualDB.put(userAccount.getUserId(), userAccount); return; } if (db == null) { try { connect(); } catch (ParseException e) { e.printStackTrace(); } } db.getCollection("user_accounts").insertOne( new Document("userID", userAccount.getUserId()).append("userName", userAccount.getUserName()).append("additionalInfo", userAccount.getAdditionalInfo())); } /** * Update DB */ public static void updateDb(UserAccount userAccount) { if (!useMongoDB) { virtualDB.put(userAccount.getUserId(), userAccount); return; } if (db == null) { try { connect(); } catch (ParseException e) { e.printStackTrace(); } } db.getCollection("user_accounts").updateOne( new Document("userID", userAccount.getUserId()), new Document("$set", new Document("userName", userAccount.getUserName()).append( "additionalInfo", userAccount.getAdditionalInfo()))); } /** * * Insert data into DB if it does not exist. Else, update it. */ public static void upsertDb(UserAccount userAccount) { if (!useMongoDB) { virtualDB.put(userAccount.getUserId(), userAccount); return; } if (db == null) { try { connect(); } catch (ParseException e) { e.printStackTrace(); } } db.getCollection("user_accounts").updateOne( new Document("userID", userAccount.getUserId()), new Document("$set", new Document("userID", userAccount.getUserId()).append("userName", userAccount.getUserName()).append("additionalInfo", userAccount.getAdditionalInfo())), new UpdateOptions().upsert(true)); } } java-design-patterns-1.18.0/caching/src/main/java/com/iluwatar/caching/LruCache.java000066400000000000000000000116211322244523500302150ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.caching; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; /** * * Data structure/implementation of the application's cache. The data structure consists of a hash * table attached with a doubly linked-list. The linked-list helps in capturing and maintaining the * LRU data in the cache. When a data is queried (from the cache), added (to the cache), or updated, * the data is moved to the front of the list to depict itself as the most-recently-used data. The * LRU data is always at the end of the list. * */ public class LruCache { private static final Logger LOGGER = LoggerFactory.getLogger(LruCache.class); class Node { String userId; UserAccount userAccount; Node previous; Node next; public Node(String userId, UserAccount userAccount) { this.userId = userId; this.userAccount = userAccount; } } int capacity; Map cache = new HashMap<>(); Node head; Node end; public LruCache(int capacity) { this.capacity = capacity; } /** * Get user account */ public UserAccount get(String userId) { if (cache.containsKey(userId)) { Node node = cache.get(userId); remove(node); setHead(node); return node.userAccount; } return null; } /** * Remove node from linked list. */ public void remove(Node node) { if (node.previous != null) { node.previous.next = node.next; } else { head = node.next; } if (node.next != null) { node.next.previous = node.previous; } else { end = node.previous; } } /** * Move node to the front of the list. */ public void setHead(Node node) { node.next = head; node.previous = null; if (head != null) { head.previous = node; } head = node; if (end == null) { end = head; } } /** * Set user account */ public void set(String userId, UserAccount userAccount) { if (cache.containsKey(userId)) { Node old = cache.get(userId); old.userAccount = userAccount; remove(old); setHead(old); } else { Node newNode = new Node(userId, userAccount); if (cache.size() >= capacity) { LOGGER.info("# Cache is FULL! Removing {} from cache...", end.userId); cache.remove(end.userId); // remove LRU data from cache. remove(end); setHead(newNode); } else { setHead(newNode); } cache.put(userId, newNode); } } public boolean contains(String userId) { return cache.containsKey(userId); } /** * Invalidate cache for user */ public void invalidate(String userId) { Node toBeRemoved = cache.remove(userId); if (toBeRemoved != null) { LOGGER.info("# {} has been updated! Removing older version from cache...", userId); remove(toBeRemoved); } } public boolean isFull() { return cache.size() >= capacity; } public UserAccount getLruData() { return end.userAccount; } /** * Clear cache */ public void clear() { head = null; end = null; cache.clear(); } /** * Returns cache data in list form. */ public List getCacheDataInListForm() { List listOfCacheData = new ArrayList<>(); Node temp = head; while (temp != null) { listOfCacheData.add(temp.userAccount); temp = temp.next; } return listOfCacheData; } /** * Set cache capacity */ public void setCapacity(int newCapacity) { if (capacity > newCapacity) { clear(); // Behavior can be modified to accommodate for decrease in cache size. For now, we'll // just clear the cache. } else { this.capacity = newCapacity; } } } java-design-patterns-1.18.0/caching/src/main/java/com/iluwatar/caching/UserAccount.java000066400000000000000000000041071322244523500307630ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.caching; /** * Entity class (stored in cache and DB) used in the application. */ public class UserAccount { private String userId; private String userName; private String additionalInfo; /** * Constructor */ public UserAccount(String userId, String userName, String additionalInfo) { this.userId = userId; this.userName = userName; this.additionalInfo = additionalInfo; } public String getUserId() { return userId; } public void setUserId(String userId) { this.userId = userId; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public String getAdditionalInfo() { return additionalInfo; } public void setAdditionalInfo(String additionalInfo) { this.additionalInfo = additionalInfo; } @Override public String toString() { return userId + ", " + userName + ", " + additionalInfo; } } java-design-patterns-1.18.0/caching/src/test/000077500000000000000000000000001322244523500207735ustar00rootroot00000000000000java-design-patterns-1.18.0/caching/src/test/java/000077500000000000000000000000001322244523500217145ustar00rootroot00000000000000java-design-patterns-1.18.0/caching/src/test/java/com/000077500000000000000000000000001322244523500224725ustar00rootroot00000000000000java-design-patterns-1.18.0/caching/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500243225ustar00rootroot00000000000000java-design-patterns-1.18.0/caching/src/test/java/com/iluwatar/caching/000077500000000000000000000000001322244523500257165ustar00rootroot00000000000000java-design-patterns-1.18.0/caching/src/test/java/com/iluwatar/caching/AppTest.java000066400000000000000000000026171322244523500301470ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.caching; import org.junit.jupiter.api.Test; import java.io.IOException; /** * Tests that Caching example runs without errors. */ public class AppTest { @Test public void test() throws IOException { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/caching/src/test/java/com/iluwatar/caching/CachingTest.java000066400000000000000000000044031322244523500307560ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.caching; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; /** * * Application test * */ public class CachingTest { App app; /** * Setup of application test includes: initializing DB connection and cache size/capacity. */ @BeforeEach public void setUp() { AppManager.initDb(false); // VirtualDB (instead of MongoDB) was used in running the JUnit tests // to avoid Maven compilation errors. Set flag to true to run the // tests with MongoDB (provided that MongoDB is installed and socket // connection is open). AppManager.initCacheCapacity(3); app = new App(); } @Test public void testReadAndWriteThroughStrategy() { app.useReadAndWriteThroughStrategy(); } @Test public void testReadThroughAndWriteAroundStrategy() { app.useReadThroughAndWriteAroundStrategy(); } @Test public void testReadThroughAndWriteBehindStrategy() { app.useReadThroughAndWriteBehindStrategy(); } @Test public void testCacheAsideStrategy() { app.useCacheAsideStategy(); } } java-design-patterns-1.18.0/callback/000077500000000000000000000000001322244523500173655ustar00rootroot00000000000000java-design-patterns-1.18.0/callback/README.md000066400000000000000000000014531322244523500206470ustar00rootroot00000000000000--- layout: pattern title: Callback folder: callback permalink: /patterns/callback/ categories: Other tags: - Java - Difficulty-Beginner - Functional - Idiom --- ## Intent Callback is a piece of executable code that is passed as an argument to other code, which is expected to call back (execute) the argument at some convenient time. ![alt text](./etc/callback.png "Callback") ## Applicability Use the Callback pattern when * when some arbitrary synchronous or asynchronous action must be performed after execution of some defined activity. ## Real world examples * [CyclicBarrier](http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/CyclicBarrier.html#CyclicBarrier%28int,%20java.lang.Runnable%29) constructor can accept callback that will be triggered every time when barrier is tripped. java-design-patterns-1.18.0/callback/etc/000077500000000000000000000000001322244523500201405ustar00rootroot00000000000000java-design-patterns-1.18.0/callback/etc/callback.png000066400000000000000000000206011322244523500224010ustar00rootroot00000000000000PNG  IHDRQr!HIDATxmUŹw /MڦiR!&H[Bx@R r(T(]@H+4kԞ6//|w33Z^?ON֙=kk7okY.AuR/APT/%ϟTĝe." hKtaśg%n 60_- W<,o20 a~zT2N˟lOz~Ԏ$H/48]kXО.?p#IXagʼw[ e__L-` ϖ0_R9*t=}^i3c~-!b%}-G@5 1ڑ2;JqíEf/$ȥJ)|!5|I6O^|KbsWŤ/AqL*{FQ;q PiQ5UVrE(5IL.l 3_rbil}"M=Ԟ!9~*B8|jqWM $Mzr(),la45ϏAe"$l"ڠk [iY(m{j%m3 VoǶ3ޘzc"5Qdwyѥ-Sν3}`I^SAMYoߪGwwk_WdsG|*Cu*K;l`5xrݪ>t৽uݤyv}IE+]p"kOuF6ga[r{%Nw%L ز-vv'g>Pi]-}k_{5M_&mKXzډAi6WqUK'VD)Ha>ӔʦtwlAr /v ojC"TXf,Ejպ +yц.}vO<$,d7qKK( I Кh5(uz̥yپudFk>/μw?vky壕5'G>75dad'GV/{ft鑑{*ĉ"DG& Ҙ'/ v>}x׏χOE,5d\5J}?Fg!GOOKSR'羽1)oOPg xq5/~GNmƮR~2'Uf|$CQ^ەKxϯt;59_YxPRierY]Uѭ݌ >#7?}؋EeL$j[:ɳ:CR3< S_0Ϛߺ͢C_z>2f8r2܊c믷|kstG/`%?<,+yXOayyXe`jm`ZayyXe`jYg_@d֌Wkee0<6q)(yX<ؚf^3oBwF-hwuc~w+'dKR1!ᖺ}v"[ZR4\qy 22<.(c;#k-9L[\n>@Jrŭ.ӉLyPl%ayHn`yqqy<3)Z> =]f.~=iJi@EbɛvBYS # `^H?vdZ» '1o] ءeC=W*x e<< Ki[oƵiZbO|"=lLܫ-*2yuL{#>Į/%j]ze$˞:z#sA`bs`Uco e#?SKu8̧|'9$O_ܙf#a6yX ayyXe`jm`Zay͞9sj@Y0̣ܔ%3S5j  W<,o20|lc. sx`y[|=,g20|X-?З^vX1eE2w8(Ê10_-+yrj?VjY{~{tewF:\kn2oه"»>q5iK~l&f78̭ԝ[~o_?Gy\Ĺ+y%)yiOXq;YXaMz>C T(/3_/E Ya^_p GNAla[og)7,zaO-"aSho?zmlߵ'v7Ld<T5^vҭ73gNzߞ/"+";gc^k8+|(v-k{j&dzHUX}̚bj0|QNbk3ɉ/ utV30Oym/erf'1`5YWtRP%EN3;zR Q d/]/i>^0,E| ]d$̻&$e5ܥ-0[׊gz`1B"l7ٜD_m)WO!.C$̻&bZ ӸʼWT([tcZH]hoNu1>.;|&?9{iLsM5>aa8w S|ߝĀydb>'Nhk'[na՝?6i>~]SfÎ}`w36zC-̻&;󱟜nҼw%4ȑJ!7[m`5Y~rD.ϸ(C*tũ Y.VҞyxKe28&u.'IѝQJPV'!~&u=Zm! mLJu O~,⋒O-={3wS&3ɑd$Mf\M!{N =)/ၲ_q#_lS|&?9t{ٖ]'-s2V篨 ws6Ῥ{,3wM&31= $h,TӲOErj Q O.IM ̻&^<ʣq6L:gKW)Mq.kAqbSG.ONN|-hx~-R!%dF@o/:4)e`AٙcJwMN0ɗ}\20`>r\ ̻&Gf`5yk0y4gU6"%$.-`rPͻrJߢk:uh:T<䚆FFF-ZT<>ùs犎>?e* CNi߾}{8xW_S/\ D#/N!w[o]}bHt:ƍo{СO5!w4wܿoW\3g+#:uTTE;<䈆=<+ A"0.9rSw?xo=}u>FV8ڷ7J̛8D7ɱ5NWlOõ+.WE}Cw޻to|~ׅk'nnے;^;q|2VWPqUmN造!I$S'9'㑨 FӃN/q_z?|f&)H.30orzַg>_^\~y>[zpjދGuCħҼ73c>[>B`/LٜBP(WP+&^sͦŋmw6ӻ_q|ہ~T|ʡ%KSlr¼,2Ù/~00`?o哫W<1+E|`;S>ó: {~9bUNO@qzP9]5v}'ww Xou{ь/|/9k ̃y^(20#0z ̃y^`<%0z)_7C[S~N7OĎո`*G`C|EYXN=NW{t(1y*xi;}#Z?CízG],a){.sy kk=ތ[ҴD{.ݙxJ8 aJ%ȝ&6m`*Gf>zDq_5c9Oو:BgӁ+N09Y1}&K1j|wPegS{>>q5.3gvt;hK`rNoz7q %% Rv!q!y,.| java-design-patterns-1.18.0/callback/pom.xml000066400000000000000000000036451322244523500207120ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 callback org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/callback/src/000077500000000000000000000000001322244523500201545ustar00rootroot00000000000000java-design-patterns-1.18.0/callback/src/main/000077500000000000000000000000001322244523500211005ustar00rootroot00000000000000java-design-patterns-1.18.0/callback/src/main/java/000077500000000000000000000000001322244523500220215ustar00rootroot00000000000000java-design-patterns-1.18.0/callback/src/main/java/com/000077500000000000000000000000001322244523500225775ustar00rootroot00000000000000java-design-patterns-1.18.0/callback/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500244275ustar00rootroot00000000000000java-design-patterns-1.18.0/callback/src/main/java/com/iluwatar/callback/000077500000000000000000000000001322244523500261635ustar00rootroot00000000000000java-design-patterns-1.18.0/callback/src/main/java/com/iluwatar/callback/App.java000066400000000000000000000034571322244523500275570ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.callback; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Callback pattern is more native for functional languages where functions are treated as * first-class citizens. Prior to Java 8 callbacks can be simulated using simple (alike command) * interfaces. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point */ public static void main(String[] args) { Task task = new SimpleTask(); Callback callback = new Callback() { @Override public void call() { LOGGER.info("I'm done now."); } }; task.executeWith(callback); } } java-design-patterns-1.18.0/callback/src/main/java/com/iluwatar/callback/Callback.java000066400000000000000000000023551322244523500305270ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.callback; /** * * Callback interface * */ public interface Callback { void call(); } java-design-patterns-1.18.0/callback/src/main/java/com/iluwatar/callback/LambdasApp.java000066400000000000000000000032261322244523500310350ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.callback; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * This example generates the exact same output as {@link App} however the callback has been * defined as a Lambdas expression. * */ public class LambdasApp { private static final Logger LOGGER = LoggerFactory.getLogger(LambdasApp.class); /** * Program entry point */ public static void main(String[] args) { Task task = new SimpleTask(); Callback c = () -> LOGGER.info("I'm done now."); task.executeWith(c); } } java-design-patterns-1.18.0/callback/src/main/java/com/iluwatar/callback/SimpleTask.java000066400000000000000000000030251322244523500311020ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.callback; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Implementation of task that need to be executed * */ public class SimpleTask extends Task { private static final Logger LOGGER = LoggerFactory.getLogger(SimpleTask.class); @Override public void execute() { LOGGER.info("Perform some important activity and after call the callback method."); } } java-design-patterns-1.18.0/callback/src/main/java/com/iluwatar/callback/Task.java000066400000000000000000000027111322244523500277310ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.callback; /** * * Template-method class for callback hook execution * */ public abstract class Task { /** * Execute with callback */ public final void executeWith(Callback callback) { execute(); if (callback != null) { callback.call(); } } public abstract void execute(); } java-design-patterns-1.18.0/callback/src/test/000077500000000000000000000000001322244523500211335ustar00rootroot00000000000000java-design-patterns-1.18.0/callback/src/test/java/000077500000000000000000000000001322244523500220545ustar00rootroot00000000000000java-design-patterns-1.18.0/callback/src/test/java/com/000077500000000000000000000000001322244523500226325ustar00rootroot00000000000000java-design-patterns-1.18.0/callback/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500244625ustar00rootroot00000000000000java-design-patterns-1.18.0/callback/src/test/java/com/iluwatar/callback/000077500000000000000000000000001322244523500262165ustar00rootroot00000000000000java-design-patterns-1.18.0/callback/src/test/java/com/iluwatar/callback/AppTest.java000066400000000000000000000026211322244523500304420ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.callback; import org.junit.jupiter.api.Test; import java.io.IOException; /** * Tests that Callback example runs without errors. */ public class AppTest { @Test public void test() throws IOException { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/callback/src/test/java/com/iluwatar/callback/CallbackTest.java000066400000000000000000000047041322244523500314220ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.callback; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Add a field as a counter. Every time the callback method is called increment this field. Unit * test checks that the field is being incremented. * * Could be done with mock objects as well where the call method call is verified. */ public class CallbackTest { private Integer callingCount = 0; @Test public void test() { Callback callback = new Callback() { @Override public void call() { callingCount++; } }; Task task = new SimpleTask(); assertEquals(new Integer(0), callingCount, "Initial calling count of 0"); task.executeWith(callback); assertEquals(new Integer(1), callingCount, "Callback called once"); task.executeWith(callback); assertEquals(new Integer(2), callingCount, "Callback called twice"); } @Test public void testWithLambdasExample() { Callback callback = () -> callingCount++; Task task = new SimpleTask(); assertEquals(new Integer(0), callingCount, "Initial calling count of 0"); task.executeWith(callback); assertEquals(new Integer(1), callingCount, "Callback called once"); task.executeWith(callback); assertEquals(new Integer(2), callingCount, "Callback called twice"); } } java-design-patterns-1.18.0/chain/000077500000000000000000000000001322244523500167135ustar00rootroot00000000000000java-design-patterns-1.18.0/chain/README.md000066400000000000000000000113301322244523500201700ustar00rootroot00000000000000--- layout: pattern title: Chain of responsibility folder: chain permalink: /patterns/chain/ categories: Behavioral tags: - Java - Gang Of Four - Difficulty-Intermediate --- ## Intent Avoid coupling the sender of a request to its receiver by giving more than one object a chance to handle the request. Chain the receiving objects and pass the request along the chain until an object handles it. ## Explanation Real world example > The Orc King gives loud orders to his army. The closest one to react is the commander, then officer and then soldier. The commander, officer and soldier here form a chain of responsibility. In plain words > It helps building a chain of objects. Request enters from one end and keeps going from object to object till it finds the suitable handler. Wikipedia says > In object-oriented design, the chain-of-responsibility pattern is a design pattern consisting of a source of command objects and a series of processing objects. Each processing object contains logic that defines the types of command objects that it can handle; the rest are passed to the next processing object in the chain. **Programmatic Example** Translating our example with orcs from above. First we have the request class ``` public class Request { private final RequestType requestType; private final String requestDescription; private boolean handled; public Request(final RequestType requestType, final String requestDescription) { this.requestType = Objects.requireNonNull(requestType); this.requestDescription = Objects.requireNonNull(requestDescription); } public String getRequestDescription() { return requestDescription; } public RequestType getRequestType() { return requestType; } public void markHandled() { this.handled = true; } public boolean isHandled() { return this.handled; } @Override public String toString() { return getRequestDescription(); } } public enum RequestType { DEFEND_CASTLE, TORTURE_PRISONER, COLLECT_TAX } ``` Then the request handler hierarchy ``` public abstract class RequestHandler { private static final Logger LOGGER = LoggerFactory.getLogger(RequestHandler.class); private RequestHandler next; public RequestHandler(RequestHandler next) { this.next = next; } public void handleRequest(Request req) { if (next != null) { next.handleRequest(req); } } protected void printHandling(Request req) { LOGGER.info("{} handling request \"{}\"", this, req); } @Override public abstract String toString(); } public class OrcCommander extends RequestHandler { public OrcCommander(RequestHandler handler) { super(handler); } @Override public void handleRequest(Request req) { if (req.getRequestType().equals(RequestType.DEFEND_CASTLE)) { printHandling(req); req.markHandled(); } else { super.handleRequest(req); } } @Override public String toString() { return "Orc commander"; } } // OrcOfficer and OrcSoldier are defined similarly as OrcCommander ``` Then we have the Orc King who gives the orders and forms the chain ``` public class OrcKing { RequestHandler chain; public OrcKing() { buildChain(); } private void buildChain() { chain = new OrcCommander(new OrcOfficer(new OrcSoldier(null))); } public void makeRequest(Request req) { chain.handleRequest(req); } } ``` Then it is used as follows ``` OrcKing king = new OrcKing(); king.makeRequest(new Request(RequestType.DEFEND_CASTLE, "defend castle")); // Orc commander handling request "defend castle" king.makeRequest(new Request(RequestType.TORTURE_PRISONER, "torture prisoner")); // Orc officer handling request "torture prisoner" king.makeRequest(new Request(RequestType.COLLECT_TAX, "collect tax")); // Orc soldier handling request "collect tax" ``` ## Applicability Use Chain of Responsibility when * more than one object may handle a request, and the handler isn't known a priori. The handler should be ascertained automatically * you want to issue a request to one of several objects without specifying the receiver explicitly * the set of objects that can handle a request should be specified dynamically ## Real world examples * [java.util.logging.Logger#log()](http://docs.oracle.com/javase/8/docs/api/java/util/logging/Logger.html#log%28java.util.logging.Level,%20java.lang.String%29) * [Apache Commons Chain](https://commons.apache.org/proper/commons-chain/index.html) * [javax.servlet.Filter#doFilter()](http://docs.oracle.com/javaee/7/api/javax/servlet/Filter.html#doFilter-javax.servlet.ServletRequest-javax.servlet.ServletResponse-javax.servlet.FilterChain-) ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.18.0/chain/pom.xml000066400000000000000000000036421322244523500202350ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 chain org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/chain/src/000077500000000000000000000000001322244523500175025ustar00rootroot00000000000000java-design-patterns-1.18.0/chain/src/main/000077500000000000000000000000001322244523500204265ustar00rootroot00000000000000java-design-patterns-1.18.0/chain/src/main/java/000077500000000000000000000000001322244523500213475ustar00rootroot00000000000000java-design-patterns-1.18.0/chain/src/main/java/com/000077500000000000000000000000001322244523500221255ustar00rootroot00000000000000java-design-patterns-1.18.0/chain/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500237555ustar00rootroot00000000000000java-design-patterns-1.18.0/chain/src/main/java/com/iluwatar/chain/000077500000000000000000000000001322244523500250375ustar00rootroot00000000000000java-design-patterns-1.18.0/chain/src/main/java/com/iluwatar/chain/App.java000066400000000000000000000044231322244523500264250ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.chain; /** * * The Chain of Responsibility pattern is a design pattern consisting of command objects and a * series of processing objects. Each processing object contains logic that defines the types of * command objects that it can handle; the rest are passed to the next processing object in the * chain. A mechanism also exists for adding new processing objects to the end of this chain. *

* Four terms always associated with the command pattern are command, receiver, invoker and client. * A command object (spell) knows about the receiver (target) and invokes a method of the receiver. * Values for parameters of the receiver method are stored in the command. The receiver then does * the work. An invoker object (wizard) knows how to execute a command, and optionally does * bookkeeping about the command execution. The invoker does not know anything about a concrete * command, it knows only about command interface. Both an invoker object and several command * objects are held by a client object (app). The client decides which commands to execute at which * points. To execute a command, it passes the command object to the invoker object. *

* In other words, in this example the wizard casts spells on the goblin. The wizard keeps track of * the previous spells cast, so it is easy to undo them. In addition, the wizard keeps track of the * spells undone, so they can be redone. * * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { Wizard wizard = new Wizard(); Goblin goblin = new Goblin(); goblin.printStatus(); wizard.castSpell(new ShrinkSpell(), goblin); goblin.printStatus(); wizard.castSpell(new InvisibilitySpell(), goblin); goblin.printStatus(); wizard.undoLastSpell(); goblin.printStatus(); wizard.undoLastSpell(); goblin.printStatus(); wizard.redoLastSpell(); goblin.printStatus(); wizard.redoLastSpell(); goblin.printStatus(); } } java-design-patterns-1.18.0/command/src/main/java/com/iluwatar/command/Command.java000066400000000000000000000026611322244523500301550ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.command; /** * * Interface for Commands. * */ public abstract class Command { public abstract void execute(Target target); public abstract void undo(); public abstract void redo(); @Override public abstract String toString(); } java-design-patterns-1.18.0/command/src/main/java/com/iluwatar/command/Goblin.java000066400000000000000000000026221322244523500300060ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.command; /** * * Goblin is the target of the spells * */ public class Goblin extends Target { public Goblin() { setSize(Size.NORMAL); setVisibility(Visibility.VISIBLE); } @Override public String toString() { return "Goblin"; } } java-design-patterns-1.18.0/command/src/main/java/com/iluwatar/command/InvisibilitySpell.java000066400000000000000000000033421322244523500322520ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.command; /** * * InvisibilitySpell is a concrete command * */ public class InvisibilitySpell extends Command { private Target target; @Override public void execute(Target target) { target.setVisibility(Visibility.INVISIBLE); this.target = target; } @Override public void undo() { if (target != null) { target.setVisibility(Visibility.VISIBLE); } } @Override public void redo() { if (target != null) { target.setVisibility(Visibility.INVISIBLE); } } @Override public String toString() { return "Invisibility spell"; } } java-design-patterns-1.18.0/command/src/main/java/com/iluwatar/command/ShrinkSpell.java000066400000000000000000000033561322244523500310370ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.command; /** * * ShrinkSpell is a concrete command * */ public class ShrinkSpell extends Command { private Size oldSize; private Target target; @Override public void execute(Target target) { oldSize = target.getSize(); target.setSize(Size.SMALL); this.target = target; } @Override public void undo() { if (oldSize != null && target != null) { Size temp = target.getSize(); target.setSize(oldSize); oldSize = temp; } } @Override public void redo() { undo(); } @Override public String toString() { return "Shrink spell"; } } java-design-patterns-1.18.0/command/src/main/java/com/iluwatar/command/Size.java000066400000000000000000000026711322244523500275120ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.command; /** * * Enumeration for target size. * */ public enum Size { SMALL("small"), NORMAL("normal"); private String title; Size(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.18.0/command/src/main/java/com/iluwatar/command/Target.java000066400000000000000000000036771322244523500300350ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.command; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Base class for spell targets. * */ public abstract class Target { private static final Logger LOGGER = LoggerFactory.getLogger(Target.class); private Size size; private Visibility visibility; public Size getSize() { return size; } public void setSize(Size size) { this.size = size; } public Visibility getVisibility() { return visibility; } public void setVisibility(Visibility visibility) { this.visibility = visibility; } @Override public abstract String toString(); /** * Print status */ public void printStatus() { LOGGER.info("{}, [size={}] [visibility={}]", this, getSize(), getVisibility()); } } java-design-patterns-1.18.0/command/src/main/java/com/iluwatar/command/Visibility.java000066400000000000000000000027261322244523500307300ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.command; /** * * Enumeration for target visibility. * */ public enum Visibility { VISIBLE("visible"), INVISIBLE("invisible"); private String title; Visibility(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.18.0/command/src/main/java/com/iluwatar/command/Wizard.java000066400000000000000000000046761322244523500300470ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.command; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.Deque; import java.util.LinkedList; /** * * Wizard is the invoker of the commands * */ public class Wizard { private static final Logger LOGGER = LoggerFactory.getLogger(Wizard.class); private Deque undoStack = new LinkedList<>(); private Deque redoStack = new LinkedList<>(); public Wizard() { // comment to ignore sonar issue: LEVEL critical } /** * Cast spell */ public void castSpell(Command command, Target target) { LOGGER.info("{} casts {} at {}", this, command, target); command.execute(target); undoStack.offerLast(command); } /** * Undo last spell */ public void undoLastSpell() { if (!undoStack.isEmpty()) { Command previousSpell = undoStack.pollLast(); redoStack.offerLast(previousSpell); LOGGER.info("{} undoes {}", this, previousSpell); previousSpell.undo(); } } /** * Redo last spell */ public void redoLastSpell() { if (!redoStack.isEmpty()) { Command previousSpell = redoStack.pollLast(); undoStack.offerLast(previousSpell); LOGGER.info("{} redoes {}", this, previousSpell); previousSpell.redo(); } } @Override public String toString() { return "Wizard"; } } java-design-patterns-1.18.0/command/src/test/000077500000000000000000000000001322244523500210155ustar00rootroot00000000000000java-design-patterns-1.18.0/command/src/test/java/000077500000000000000000000000001322244523500217365ustar00rootroot00000000000000java-design-patterns-1.18.0/command/src/test/java/com/000077500000000000000000000000001322244523500225145ustar00rootroot00000000000000java-design-patterns-1.18.0/command/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500243445ustar00rootroot00000000000000java-design-patterns-1.18.0/command/src/test/java/com/iluwatar/command/000077500000000000000000000000001322244523500257625ustar00rootroot00000000000000java-design-patterns-1.18.0/command/src/test/java/com/iluwatar/command/AppTest.java000066400000000000000000000026171322244523500302130ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.command; import org.junit.jupiter.api.Test; import java.io.IOException; /** * Tests that Command example runs without errors. */ public class AppTest { @Test public void test() throws IOException { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/command/src/test/java/com/iluwatar/command/CommandTest.java000066400000000000000000000103441322244523500310450ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.command; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * The Command pattern is a behavioral design pattern in which an object is used to encapsulate all * information needed to perform an action or trigger an event at a later time. This information * includes the method name, the object that owns the method and values for the method parameters. * *

Four terms always associated with the command pattern are command, receiver, invoker and * client. A command object (spell) knows about the receiver (target) and invokes a method of * the receiver.Values for parameters of the receiver method are stored in the command. The receiver * then does the work. An invoker object (wizard) knows how to execute a command, and optionally * does bookkeeping about the command execution. The invoker does not know anything about a * concrete command, it knows only about command interface. Both an invoker object and several * command objects are held by a client object (app). The client decides which commands to execute * at which points. To execute a command, it passes the command object to the invoker object. */ public class CommandTest { private static final String GOBLIN = "Goblin"; /** * This test verifies that when the wizard casts spells on the goblin. The wizard keeps track of * the previous spells cast, so it is easy to undo them. In addition, it also verifies that the * wizard keeps track of the spells undone, so they can be redone. */ @Test public void testCommand() { Wizard wizard = new Wizard(); Goblin goblin = new Goblin(); wizard.castSpell(new ShrinkSpell(), goblin); verifyGoblin(goblin, GOBLIN, Size.SMALL, Visibility.VISIBLE); wizard.castSpell(new InvisibilitySpell(), goblin); verifyGoblin(goblin, GOBLIN, Size.SMALL, Visibility.INVISIBLE); wizard.undoLastSpell(); verifyGoblin(goblin, GOBLIN, Size.SMALL, Visibility.VISIBLE); wizard.undoLastSpell(); verifyGoblin(goblin, GOBLIN, Size.NORMAL, Visibility.VISIBLE); wizard.redoLastSpell(); verifyGoblin(goblin, GOBLIN, Size.SMALL, Visibility.VISIBLE); wizard.redoLastSpell(); verifyGoblin(goblin, GOBLIN, Size.SMALL, Visibility.INVISIBLE); } /** * This method asserts that the passed goblin object has the name as expectedName, size as * expectedSize and visibility as expectedVisibility. * * @param goblin a goblin object whose state is to be verified against other parameters * @param expectedName expectedName of the goblin * @param expectedSize expected size of the goblin * @param expectedVisibility expected visibility of the goblin */ private void verifyGoblin(Goblin goblin, String expectedName, Size expectedSize, Visibility expectedVisibility) { assertEquals(expectedName, goblin.toString(), "Goblin's name must be same as expectedName"); assertEquals(expectedSize, goblin.getSize(), "Goblin's size must be same as expectedSize"); assertEquals(expectedVisibility, goblin.getVisibility(), "Goblin's visibility must be same as expectedVisibility"); } } java-design-patterns-1.18.0/composite/000077500000000000000000000000001322244523500176335ustar00rootroot00000000000000java-design-patterns-1.18.0/composite/README.md000066400000000000000000000126631322244523500211220ustar00rootroot00000000000000--- layout: pattern title: Composite folder: composite permalink: /patterns/composite/ categories: Structural tags: - Java - Gang Of Four - Difficulty-Intermediate --- ## Intent Compose objects into tree structures to represent part-whole hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly. ## Explanation Real world example > Every sentence is composed of words which are in turn composed of characters. Each of these objects is printable and they can have something printed before or after them like sentence always ends with full stop and word always has space before it In plain words > Composite pattern lets clients treat the individual objects in a uniform manner. Wikipedia says > In software engineering, the composite pattern is a partitioning design pattern. The composite pattern describes that a group of objects is to be treated in the same way as a single instance of an object. The intent of a composite is to "compose" objects into tree structures to represent part-whole hierarchies. Implementing the composite pattern lets clients treat individual objects and compositions uniformly. **Programmatic Example** Taking our sentence example from above. Here we have the base class and different printable types ``` public abstract class LetterComposite { private List children = new ArrayList<>(); public void add(LetterComposite letter) { children.add(letter); } public int count() { return children.size(); } protected void printThisBefore() {} protected void printThisAfter() {} public void print() { printThisBefore(); for (LetterComposite letter : children) { letter.print(); } printThisAfter(); } } public class Letter extends LetterComposite { private char c; public Letter(char c) { this.c = c; } @Override protected void printThisBefore() { System.out.print(c); } } public class Word extends LetterComposite { public Word(List letters) { for (Letter l : letters) { this.add(l); } } @Override protected void printThisBefore() { System.out.print(" "); } } public class Sentence extends LetterComposite { public Sentence(List words) { for (Word w : words) { this.add(w); } } @Override protected void printThisAfter() { System.out.print("."); } } ``` Then we have a messenger to carry messages ``` public class Messenger { LetterComposite messageFromOrcs() { List words = new ArrayList<>(); words.add(new Word(Arrays.asList(new Letter('W'), new Letter('h'), new Letter('e'), new Letter('r'), new Letter('e')))); words.add(new Word(Arrays.asList(new Letter('t'), new Letter('h'), new Letter('e'), new Letter('r'), new Letter('e')))); words.add(new Word(Arrays.asList(new Letter('i'), new Letter('s')))); words.add(new Word(Arrays.asList(new Letter('a')))); words.add(new Word(Arrays.asList(new Letter('w'), new Letter('h'), new Letter('i'), new Letter('p')))); words.add(new Word(Arrays.asList(new Letter('t'), new Letter('h'), new Letter('e'), new Letter('r'), new Letter('e')))); words.add(new Word(Arrays.asList(new Letter('i'), new Letter('s')))); words.add(new Word(Arrays.asList(new Letter('a')))); words.add(new Word(Arrays.asList(new Letter('w'), new Letter('a'), new Letter('y')))); return new Sentence(words); } LetterComposite messageFromElves() { List words = new ArrayList<>(); words.add(new Word(Arrays.asList(new Letter('M'), new Letter('u'), new Letter('c'), new Letter('h')))); words.add(new Word(Arrays.asList(new Letter('w'), new Letter('i'), new Letter('n'), new Letter('d')))); words.add(new Word(Arrays.asList(new Letter('p'), new Letter('o'), new Letter('u'), new Letter('r'), new Letter('s')))); words.add(new Word(Arrays.asList(new Letter('f'), new Letter('r'), new Letter('o'), new Letter('m')))); words.add(new Word(Arrays.asList(new Letter('y'), new Letter('o'), new Letter('u'), new Letter('r')))); words.add(new Word(Arrays.asList(new Letter('m'), new Letter('o'), new Letter('u'), new Letter('t'), new Letter('h')))); return new Sentence(words); } } ``` And then it can be used as ``` LetterComposite orcMessage = new Messenger().messageFromOrcs(); orcMessage.print(); // Where there is a whip there is a way. LetterComposite elfMessage = new Messenger().messageFromElves(); elfMessage.print(); // Much wind pours from your mouth. ``` ## Applicability Use the Composite pattern when * you want to represent part-whole hierarchies of objects * you want clients to be able to ignore the difference between compositions of objects and individual objects. Clients will treat all objects in the composite structure uniformly ## Real world examples * [java.awt.Container](http://docs.oracle.com/javase/8/docs/api/java/awt/Container.html) and [java.awt.Component](http://docs.oracle.com/javase/8/docs/api/java/awt/Component.html) * [Apache Wicket](https://github.com/apache/wicket) component tree, see [Component](https://github.com/apache/wicket/blob/91e154702ab1ff3481ef6cbb04c6044814b7e130/wicket-core/src/main/java/org/apache/wicket/Component.java) and [MarkupContainer](https://github.com/apache/wicket/blob/b60ec64d0b50a611a9549809c9ab216f0ffa3ae3/wicket-core/src/main/java/org/apache/wicket/MarkupContainer.java) ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.18.0/composite/pom.xml000066400000000000000000000036461322244523500211610ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 composite org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/composite/src/000077500000000000000000000000001322244523500204225ustar00rootroot00000000000000java-design-patterns-1.18.0/composite/src/main/000077500000000000000000000000001322244523500213465ustar00rootroot00000000000000java-design-patterns-1.18.0/composite/src/main/java/000077500000000000000000000000001322244523500222675ustar00rootroot00000000000000java-design-patterns-1.18.0/composite/src/main/java/com/000077500000000000000000000000001322244523500230455ustar00rootroot00000000000000java-design-patterns-1.18.0/composite/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500246755ustar00rootroot00000000000000java-design-patterns-1.18.0/composite/src/main/java/com/iluwatar/composite/000077500000000000000000000000001322244523500266775ustar00rootroot00000000000000java-design-patterns-1.18.0/composite/src/main/java/com/iluwatar/composite/App.java000066400000000000000000000044301322244523500302630ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.composite; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * The Composite pattern is a partitioning design pattern. The Composite pattern describes that a * group of objects is to be treated in the same way as a single instance of an object. The intent * of a composite is to "compose" objects into tree structures to represent part-whole hierarchies. * Implementing the Composite pattern lets clients treat individual objects and compositions * uniformly. *

* In this example we have sentences composed of words composed of letters. All of the objects can * be treated through the same interface ({@link LetterComposite}). * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args command line args */ public static void main(String[] args) { LOGGER.info("Message from the orcs: "); LetterComposite orcMessage = new Messenger().messageFromOrcs(); orcMessage.print(); LOGGER.info("\nMessage from the elves: "); LetterComposite elfMessage = new Messenger().messageFromElves(); elfMessage.print(); } } java-design-patterns-1.18.0/composite/src/main/java/com/iluwatar/composite/Letter.java000066400000000000000000000025631322244523500310070ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.composite; /** * * Letter * */ public class Letter extends LetterComposite { private char c; public Letter(char c) { this.c = c; } @Override protected void printThisBefore() { System.out.print(c); } } java-design-patterns-1.18.0/composite/src/main/java/com/iluwatar/composite/LetterComposite.java000066400000000000000000000034251322244523500326700ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.composite; import java.util.ArrayList; import java.util.List; /** * * Composite interface. * */ public abstract class LetterComposite { private List children = new ArrayList<>(); public void add(LetterComposite letter) { children.add(letter); } public int count() { return children.size(); } protected void printThisBefore() {} protected void printThisAfter() {} /** * Print */ public void print() { printThisBefore(); for (LetterComposite letter : children) { letter.print(); } printThisAfter(); } } java-design-patterns-1.18.0/composite/src/main/java/com/iluwatar/composite/Messenger.java000066400000000000000000000061321322244523500314740ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.composite; import java.util.ArrayList; import java.util.Arrays; import java.util.List; /** * * Messenger * */ public class Messenger { LetterComposite messageFromOrcs() { List words = new ArrayList<>(); words.add(new Word(Arrays.asList(new Letter('W'), new Letter('h'), new Letter('e'), new Letter( 'r'), new Letter('e')))); words.add(new Word(Arrays.asList(new Letter('t'), new Letter('h'), new Letter('e'), new Letter( 'r'), new Letter('e')))); words.add(new Word(Arrays.asList(new Letter('i'), new Letter('s')))); words.add(new Word(Arrays.asList(new Letter('a')))); words.add(new Word(Arrays.asList(new Letter('w'), new Letter('h'), new Letter('i'), new Letter( 'p')))); words.add(new Word(Arrays.asList(new Letter('t'), new Letter('h'), new Letter('e'), new Letter( 'r'), new Letter('e')))); words.add(new Word(Arrays.asList(new Letter('i'), new Letter('s')))); words.add(new Word(Arrays.asList(new Letter('a')))); words.add(new Word(Arrays.asList(new Letter('w'), new Letter('a'), new Letter('y')))); return new Sentence(words); } LetterComposite messageFromElves() { List words = new ArrayList<>(); words.add(new Word(Arrays.asList(new Letter('M'), new Letter('u'), new Letter('c'), new Letter( 'h')))); words.add(new Word(Arrays.asList(new Letter('w'), new Letter('i'), new Letter('n'), new Letter( 'd')))); words.add(new Word(Arrays.asList(new Letter('p'), new Letter('o'), new Letter('u'), new Letter( 'r'), new Letter('s')))); words.add(new Word(Arrays.asList(new Letter('f'), new Letter('r'), new Letter('o'), new Letter( 'm')))); words.add(new Word(Arrays.asList(new Letter('y'), new Letter('o'), new Letter('u'), new Letter( 'r')))); words.add(new Word(Arrays.asList(new Letter('m'), new Letter('o'), new Letter('u'), new Letter( 't'), new Letter('h')))); return new Sentence(words); } } java-design-patterns-1.18.0/composite/src/main/java/com/iluwatar/composite/Sentence.java000066400000000000000000000027121322244523500313100ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.composite; import java.util.List; /** * * Sentence * */ public class Sentence extends LetterComposite { /** * Constructor */ public Sentence(List words) { for (Word w : words) { this.add(w); } } @Override protected void printThisAfter() { System.out.print("."); } } java-design-patterns-1.18.0/composite/src/main/java/com/iluwatar/composite/Word.java000066400000000000000000000027071322244523500304630ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.composite; import java.util.List; /** * * Word * */ public class Word extends LetterComposite { /** * Constructor */ public Word(List letters) { for (Letter l : letters) { this.add(l); } } @Override protected void printThisBefore() { System.out.print(" "); } } java-design-patterns-1.18.0/composite/src/test/000077500000000000000000000000001322244523500214015ustar00rootroot00000000000000java-design-patterns-1.18.0/composite/src/test/java/000077500000000000000000000000001322244523500223225ustar00rootroot00000000000000java-design-patterns-1.18.0/composite/src/test/java/com/000077500000000000000000000000001322244523500231005ustar00rootroot00000000000000java-design-patterns-1.18.0/composite/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500247305ustar00rootroot00000000000000java-design-patterns-1.18.0/composite/src/test/java/com/iluwatar/composite/000077500000000000000000000000001322244523500267325ustar00rootroot00000000000000java-design-patterns-1.18.0/composite/src/test/java/com/iluwatar/composite/AppTest.java000066400000000000000000000025121322244523500311550ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.composite; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/composite/src/test/java/com/iluwatar/composite/MessengerTest.java000066400000000000000000000067541322244523500324010ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.composite; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import java.io.ByteArrayOutputStream; import java.io.PrintStream; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; /** * Date: 12/11/15 - 8:12 PM * * @author Jeroen Meulemeester */ public class MessengerTest { /** * The buffer used to capture every write to {@link System#out} */ private ByteArrayOutputStream stdOutBuffer = new ByteArrayOutputStream(); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream realStdOut = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @BeforeEach public void setUp() { this.stdOutBuffer = new ByteArrayOutputStream(); System.setOut(new PrintStream(stdOutBuffer)); } /** * Removed the mocked std-out {@link PrintStream} again from the {@link System} class */ @AfterEach public void tearDown() { System.setOut(realStdOut); } /** * Test the message from the orcs */ @Test public void testMessageFromOrcs() { final Messenger messenger = new Messenger(); testMessage( messenger.messageFromOrcs(), "Where there is a whip there is a way." ); } /** * Test the message from the elves */ @Test public void testMessageFromElves() { final Messenger messenger = new Messenger(); testMessage( messenger.messageFromElves(), "Much wind pours from your mouth." ); } /** * Test if the given composed message matches the expected message * * @param composedMessage The composed message, received from the messenger * @param message The expected message */ private void testMessage(final LetterComposite composedMessage, final String message) { // Test is the composed message has the correct number of words final String[] words = message.split(" "); assertNotNull(composedMessage); assertEquals(words.length, composedMessage.count()); // Print the message to the mocked stdOut ... composedMessage.print(); // ... and verify if the message matches with the expected one assertEquals(message, new String(this.stdOutBuffer.toByteArray()).trim()); } } java-design-patterns-1.18.0/converter/000077500000000000000000000000001322244523500176405ustar00rootroot00000000000000java-design-patterns-1.18.0/converter/README.md000066400000000000000000000020011322244523500211100ustar00rootroot00000000000000--- layout: pattern title: Converter folder: converter permalink: /patterns/converter/ categories: Business Tier tags: - Java - Difficulty-Beginner --- ## Intent The purpose of the Converter Pattern is to provide a generic, common way of bidirectional conversion between corresponding types, allowing a clean implementation in which the types do not need to be aware of each other. Moreover, the Converter Pattern introduces bidirectional collection mapping, reducing a boilerplate code to minimum. ![alt text](./etc/converter.png "Converter Pattern") ## Applicability Use the Converter Pattern in the following situations: * When you have types that logically correspond which other and you need to convert entities between them * When you want to provide different ways of types conversions depending on a context * Whenever you introduce a DTO (Data transfer object), you will probably need to convert it into the domain equivalence ## Credits * [Converter](http://www.xsolve.pl/blog/converter-pattern-in-java-8/) java-design-patterns-1.18.0/converter/etc/000077500000000000000000000000001322244523500204135ustar00rootroot00000000000000java-design-patterns-1.18.0/converter/etc/Converter.png000066400000000000000000000456751322244523500231110ustar00rootroot00000000000000PNG  IHDRrKIDATxoW}$/&PU-XM˦[M.FVaKlS4(k:-`n6] ITW=q(oB4Vm**oΝgΟsܝ3GVsgϜ93` Pؽz4Bu]'\*p!1acKpuRDU@֐ B ]%eU*1$(öBW$AhJ DᨊFhj-x[LrEDs'Z3pm@d"]zޢ9&劈N:ge1)PĺK((#47؈MHT%8F.&" ԚP.5\~و.pAgXXBbx]^Byw|k$(g7hu:k+L/4~I!Ah.сRFD,Dɇ,a\#1כ;KYD剆 s\ax@ML-f*Q[5nUJY㼱%A99D 7]4m0 |k[oǛ˄*NZ%AyD 7]6vFaRUB[r<|VFuUΏ^i V_y _ (o[[mG.jVDZ;4B=w+/}?~?^]{K'> @LTDo0۾ OOd)IG7HP_>]Y%D`B敊!'%xׄ'Ǯʵ}/. qMf;Oҟ؁'3)XQύϧf`ReN³׾rﮞz_7zI?XPO|bJ3,}#z{2&^$SK vY$Q^*=}i-#Ay,urҫ'_XVzFO%17蚁lQ~_/<~N Ƿ|If-{-KflN&-R^% ZUC6Ay,sXeK]%Z UiZUo"隁m_Չ3Ww'bᶕ}dm럸m~aH)g WDm:mJWjs[|-$Ay,sdeE WV+gB-` 7[t@G s~߼z Y~畟X$T!ïǪ遈?2]f)U,sWV+gB-` 7[t@|X_?q ?7Lg޳q^ [WFf 兾v#UgkD䌁K2b^hՑREfqmѻ䉼9YPc @^vo㓛򅕟ׯ#⿹° *hf_)l:  O,3N.sV+gBU q,c ot\ޙ}宻Wv)W,쑏|<qo3 ;:[i1cec4AyN,we&]SٝN&ZkuT`7Dܣbk_랍|ȁG_,h1:ǐMg^Ds"Bnɭ>q3ݟ#]d'_IP+;x̏hu~DY&AhJ l% ʰ-DUb `+IPm!Z[I2l *tJa[V@V B ]%Bo>ڮyΐ#$(FDsD!j#A " Z'pt@D+>NA=TOukGb(#b絊["v@HO w}sЮ5dR԰M/pqMlKSWTI*o\^::sGȳ 4]*nmt@{򺌒hO\p"G}Vl62z$)ǾUn&cpʈ<@ykF' D7wouH2GwfaŁ_~F-N6OdX#S\\YRJY~՚R y[DVp5\D: ʰ-DUb `+IPm!Z[I2l *tJa[V@V B ]%eU*b׮h0D\4*p遀a:U*{€m$AhJ l% ʰ-DUn Ʒ޷gǿ#(?*< ʰ-DUV` uHΓ B ]e!Ah^a/?a[VC$jכ>'$ϩ 5h H-UC/p㝊 =($5fAY:JV,%Jm* ,liP.-" ~硖TG;&ZEr?Ḏ o|`a0Xb1wb !>qzjJpؑ'eQ͡_N\p_پ(6U3>& Ćh6ÿ@WG -ZR(v_E߈7^ScIq^U4 igr,tMV]eo:_Uv/{  9W+Jk*?Wj-LeB ⿓f,mZ$8u7`qsAI$1F5ʕ/خxC_6i!^iNSh:) D\ˢ|˔ ^‚=v2QDTI&@YlrP.uu2 `!,D4ԙ7x; [q,'DhU , q-, #UOiaSa1QMʥ̱/1/{ѕܠ\Xx9d"DhUNi o Q{ == CzC îœ1RmqakT\0/MG';('b^i-LvrBPFhqNc i5c}T#U b ANeiʻ.ncrg7GRWh&Udj ʒtuF 4No@3\Ouh 03[;C 6huzb v2b&R5=j1jV eU*1$(öBW$AhJ l% ʰ-DUn tQFq@2l *t)w :O2l *tveU*+{῿x`GHPm!Zr=(mR6V52i,E֟$(G SmjViSM4(.YS a2<1TMAZ)jX."_eDXԓe nKt>(3I|GPNe0BuUVH(Nc Ʃ_DQN`!z0-'kp^,)ѿڢg(mwT[db~J<*eg Hiաg88P$W/U]|X2RZjeiKMdN4 DD2݁] ZE7ȋI`t޽ߓn+ uWq'M/Zb6dߚHT2N2p=J drՑ/ц72K˗^j }Y4$U_6ɑ*Z4q"YAW[:o–XVJ0CE{ {4dl!T0+NA9uVpa, QRr" r9q0ޘٞdV™z ]?3U@貰ܼ}8YH)U?P=䠜qu(AMn(6e/F2rw^Գr1ZENsJf 0` eg׌Khw5jM0Jްu*H2"dr{،Nn۔xpCv5%I#R tNAt U=Nc i5;.jeIn5*5@iހgh/Vj7XscC/[;@˾6huV:f Nu6 ͢4Y{D"Za[V@V B ]%eU*1$(öBW$AhJص= !:a0Q聀m$AhJ l% ʰ-DUb `+Ҡ=+o%>YN7[+SOGV]b}?K;–LN2 9V ;I: j9pωڏv 2JJYAzo1.)ܢ ,AC)o>7#d`1J le['Kr7+;ʤt$ZE!)C]`oGA9z~$Kc}З^ܨ'Yo-lNvvVjwX@#^~뙭ψQ;m{{R:RCWF  Ψbz-{+jiLMtG:fHtndFTIaEFgFYJ.=Nu=(u`ZHEeV^)qէ[zو[X),!b3J助bw{2&opPN+=͛vPS@KrEØ%(BWY@tzeuZHoM|+27ac.R: 1b|XO7,^) #ՁѴt\rwT0ʰ*t -w~G}GR.˜< {)2f Ŧ1]ךpr8Ez sPg4p\*t đ 'lZmeWžbeqm_,|-08E~Mڬ24>thrBC+łh(&`/who([m:Ŕ!,isL(n Ʒ޷gǿ#(?*<;7)RΰZEγ!CZt ʙ &H?^5Iy-d,R)Ӓ:E-YZa gvjՠI'0cf 'I[:$y(uVk ?69(c'D1񷈁Hh ~욙. ǩyBmnjX',W&XdisNtl+/Yr^aLGX+ E;&dN)SCN "}bگs(ZNt(Q֢LxčJfHγo%/4owV&3^a Ojw&ڔD`4XԪA6BbBbNc ]:Le-ƉvVI>n23+y%:39\WY ?*(-ժC؈RNDR@LwX@#^~뙭ψ (.fi;A1X:\O2f(Q#wm#+3K#rz/lllPΡl#D(rҏ 'NK{VQ{ ^9{%t W:png#nb\&VcbJZJ(Ѣ\Lu8҄r[+MJve{r;\,<2d9qӉյk!5QN?F.5 㼡d0lǂf0Z=ه[9lia.jD`9q˩_:zQ_QsTpڳMg Z.0'@̓eU*#N:'.=JL #n }ypMP Q a$(öBWY@9|ho^Y_}X2QJnVơdBӮ3 xP>R~3?a[V,m d3NPGgi3 B ]4a$(öBWdAy׮( ! m l {<BW٣eU*1$(öBW9yGǵ[˿_Ͽ~`-DUV` t?*<[ sbk!ZZQEAYڴwh^a/?a[Vlkh`JM;ZO0ˤ /WlQ?͔2T4s6)hgb-l4g RuBw%\0!t}fpr!2l͵rU@a\y.Yve;}h7:pyLJL071hdsHɩ2fkG[񩓠60(:bbDL[ x1yŕٌ G5W{ NiU;~jbm#N:'.=JEvRLf_M`/[F4Ws0euHFN!X E|^oց@+/=s\no<ٹW{^aԡդde֭mLۅQ9|ho^Y_}X2Qǟkj+~M'TuС4Riq< Zt˽R]ODž] -i.isW[Ցxkq>ͱjEgz\wVҿ,{4 Cmvџq>|?b!X;%?Fqf]ꚺYg8U^=mOM6Ωr0T fdc_/뢧f9k3ʸ)-.ݘ!AhJ l% ʰ-DUb `+IPm!Z[I2l *t0w{\!. 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"? g&Nܩ#0: D5@04040404ޮ]i!^"@i` Pv5CH"IENDB`java-design-patterns-1.18.0/converter/etc/Converter.ucls000066400000000000000000000067331322244523500232630ustar00rootroot00000000000000 java-design-patterns-1.18.0/converter/pom.xml000066400000000000000000000042241322244523500211570ustar00rootroot00000000000000 java-design-patterns com.iluwatar 1.18.0 4.0.0 org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test com.google.guava guava converter java-design-patterns-1.18.0/converter/src/000077500000000000000000000000001322244523500204275ustar00rootroot00000000000000java-design-patterns-1.18.0/converter/src/main/000077500000000000000000000000001322244523500213535ustar00rootroot00000000000000java-design-patterns-1.18.0/converter/src/main/java/000077500000000000000000000000001322244523500222745ustar00rootroot00000000000000java-design-patterns-1.18.0/converter/src/main/java/com/000077500000000000000000000000001322244523500230525ustar00rootroot00000000000000java-design-patterns-1.18.0/converter/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500247025ustar00rootroot00000000000000java-design-patterns-1.18.0/converter/src/main/java/com/iluwatar/converter/000077500000000000000000000000001322244523500267115ustar00rootroot00000000000000java-design-patterns-1.18.0/converter/src/main/java/com/iluwatar/converter/App.java000066400000000000000000000046631322244523500303050ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.converter; import com.google.common.collect.Lists; import java.util.ArrayList; import java.util.List; /** * The Converter pattern is a behavioral design pattern which allows a common way of bidirectional * conversion between corresponding types (e.g. DTO and domain representations of the logically * isomorphic types). Moreover, the pattern introduces a common way of converting a collection of * objects between types. */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { Converter userConverter = new UserConverter(); UserDto dtoUser = new UserDto("John", "Doe", true, "whatever[at]wherever.com"); User user = userConverter.convertFromDto(dtoUser); System.out.println("Entity converted from DTO:" + user); ArrayList users = Lists.newArrayList(new User("Camile", "Tough", false, "124sad"), new User("Marti", "Luther", true, "42309fd"), new User("Kate", "Smith", true, "if0243")); System.out.println("Domain entities:"); users.forEach(System.out::println); System.out.println("DTO entities converted from domain:"); List dtoEntities = userConverter.createFromEntities(users); dtoEntities.forEach(System.out::println); } } java-design-patterns-1.18.0/converter/src/main/java/com/iluwatar/converter/Converter.java000066400000000000000000000064001322244523500315230ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.converter; import java.util.Collection; import java.util.List; import java.util.function.Function; import java.util.stream.Collectors; /** * Generic converter, thanks to Java8 features not only provides a way of generic bidirectional * conversion between coresponding types, but also a common way of converting a collection of objects * of the same type, reducing boilerplate code to the absolute minimum. * @param DTO representation's type * @param Domain representation's type */ public class Converter { private final Function fromDto; private final Function fromEntity; /** * @param fromDto Function that converts given dto entity into the domain entity. * @param fromEntity Function that converts given domain entity into the dto entity. */ public Converter(final Function fromDto, final Function fromEntity) { this.fromDto = fromDto; this.fromEntity = fromEntity; } /** * @param userDto DTO entity * @return The domain representation - the result of the converting function application on dto entity. */ public final U convertFromDto(final T userDto) { return fromDto.apply(userDto); } /** * @param user domain entity * @return The DTO representation - the result of the converting function application on domain entity. */ public final T convertFromEntity(final U user) { return fromEntity.apply(user); } /** * @param dtoUsers collection of DTO entities * @return List of domain representation of provided entities retrieved by * mapping each of them with the conversion function */ public final List createFromDtos(final Collection dtoUsers) { return dtoUsers.stream().map(this::convertFromDto).collect(Collectors.toList()); } /** * @param users collection of domain entities * @return List of domain representation of provided entities retrieved by * mapping each of them with the conversion function */ public final List createFromEntities(final Collection users) { return users.stream().map(this::convertFromEntity).collect(Collectors.toList()); } } java-design-patterns-1.18.0/converter/src/main/java/com/iluwatar/converter/User.java000066400000000000000000000051721322244523500304770ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.converter; import java.util.Objects; /** * User class */ public class User { private String firstName; private String lastName; private boolean isActive; private String userId; /** * @param firstName user's first name * @param lastName user's last name * @param isActive flag indicating whether the user is active * @param userId user's identificator */ public User(String firstName, String lastName, boolean isActive, String userId) { this.firstName = firstName; this.lastName = lastName; this.isActive = isActive; this.userId = userId; } public String getFirstName() { return firstName; } public String getLastName() { return lastName; } public boolean isActive() { return isActive; } public String getUserId() { return userId; } @Override public boolean equals(Object o) { if (this == o) { return true; } if (o == null || getClass() != o.getClass()) { return false; } User user = (User) o; return isActive == user.isActive && Objects.equals(firstName, user.firstName) && Objects .equals(lastName, user.lastName) && Objects.equals(userId, user.userId); } @Override public int hashCode() { return Objects.hash(firstName, lastName, isActive, userId); } @Override public String toString() { return "User{" + "firstName='" + firstName + '\'' + ", lastName='" + lastName + '\'' + ", isActive=" + isActive + ", userId='" + userId + '\'' + '}'; } } java-design-patterns-1.18.0/converter/src/main/java/com/iluwatar/converter/UserConverter.java000066400000000000000000000031251322244523500323630ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.converter; /** * Example implementation of the simple User converter. */ public class UserConverter extends Converter { /** * Constructor. */ public UserConverter() { super(userDto -> new User(userDto.getFirstName(), userDto.getLastName(), userDto.isActive(), userDto.getEmail()), user -> new UserDto(user.getFirstName(), user.getLastName(), user.isActive(), user.getUserId())); } } java-design-patterns-1.18.0/converter/src/main/java/com/iluwatar/converter/UserDto.java000066400000000000000000000052261322244523500311460ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.converter; import java.util.Objects; /** * User DTO class */ public class UserDto { private String firstName; private String lastName; private boolean isActive; private String email; /** * @param firstName user's first name * @param lastName user's last name * @param isActive flag indicating whether the user is active * @param email user's email address */ public UserDto(String firstName, String lastName, boolean isActive, String email) { this.firstName = firstName; this.lastName = lastName; this.isActive = isActive; this.email = email; } public String getFirstName() { return firstName; } public String getLastName() { return lastName; } public boolean isActive() { return isActive; } public String getEmail() { return email; } @Override public boolean equals(Object o) { if (this == o) { return true; } if (o == null || getClass() != o.getClass()) { return false; } UserDto userDto = (UserDto) o; return isActive == userDto.isActive && Objects.equals(firstName, userDto.firstName) && Objects .equals(lastName, userDto.lastName) && Objects.equals(email, userDto.email); } @Override public int hashCode() { return Objects.hash(firstName, lastName, isActive, email); } @Override public String toString() { return "UserDto{" + "firstName='" + firstName + '\'' + ", lastName='" + lastName + '\'' + ", isActive=" + isActive + ", email='" + email + '\'' + '}'; } } java-design-patterns-1.18.0/converter/src/test/000077500000000000000000000000001322244523500214065ustar00rootroot00000000000000java-design-patterns-1.18.0/converter/src/test/java/000077500000000000000000000000001322244523500223275ustar00rootroot00000000000000java-design-patterns-1.18.0/converter/src/test/java/com/000077500000000000000000000000001322244523500231055ustar00rootroot00000000000000java-design-patterns-1.18.0/converter/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500247355ustar00rootroot00000000000000java-design-patterns-1.18.0/converter/src/test/java/com/iluwatar/converter/000077500000000000000000000000001322244523500267445ustar00rootroot00000000000000java-design-patterns-1.18.0/converter/src/test/java/com/iluwatar/converter/AppTest.java000066400000000000000000000025101322244523500311650ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.converter; import org.junit.jupiter.api.Test; /** * App running test */ public class AppTest { @Test public void testMain() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/converter/src/test/java/com/iluwatar/converter/ConverterTest.java000066400000000000000000000067321322244523500324260ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.converter; import com.google.common.collect.Lists; import org.junit.jupiter.api.Test; import java.util.ArrayList; import java.util.List; import java.util.Random; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Tests for {@link Converter} */ public class ConverterTest { private UserConverter userConverter = new UserConverter(); /** * Tests whether a converter created of opposite functions holds equality as a bijection. */ @Test public void testConversionsStartingFromDomain() { User u1 = new User("Tom", "Hanks", true, "tom@hanks.com"); User u2 = userConverter.convertFromDto(userConverter.convertFromEntity(u1)); assertEquals(u1, u2); } /** * Tests whether a converter created of opposite functions holds equality as a bijection. */ @Test public void testConversionsStartingFromDto() { UserDto u1 = new UserDto("Tom", "Hanks", true, "tom@hanks.com"); UserDto u2 = userConverter.convertFromEntity(userConverter.convertFromDto(u1)); assertEquals(u1, u2); } /** * Tests the custom users converter. Thanks to Java8 lambdas, converter can be easily and * cleanly instantiated allowing various different conversion strategies to be implemented. */ @Test public void testCustomConverter() { Converter converter = new Converter<>( userDto -> new User(userDto.getFirstName(), userDto.getLastName(), userDto.isActive(), String.valueOf(new Random().nextInt())), user -> new UserDto(user.getFirstName(), user.getLastName(), user.isActive(), user.getFirstName().toLowerCase() + user.getLastName().toLowerCase() + "@whatever.com")); User u1 = new User("John", "Doe", false, "12324"); UserDto userDto = converter.convertFromEntity(u1); assertEquals(userDto.getEmail(), "johndoe@whatever.com"); } /** * Test whether converting a collection of Users to DTO Users and then converting them back to domain * users returns an equal collection. */ @Test public void testCollectionConversion() { ArrayList users = Lists.newArrayList(new User("Camile", "Tough", false, "124sad"), new User("Marti", "Luther", true, "42309fd"), new User("Kate", "Smith", true, "if0243")); List fromDtos = userConverter.createFromDtos(userConverter.createFromEntities(users)); assertEquals(fromDtos, users); } } java-design-patterns-1.18.0/cqrs/000077500000000000000000000000001322244523500166015ustar00rootroot00000000000000java-design-patterns-1.18.0/cqrs/README.md000066400000000000000000000015521322244523500200630ustar00rootroot00000000000000--- layout: pattern title: CQRS folder: cqrs permalink: /patterns/cqrs/ categories: Architectural tags: - Java - Difficulty-Intermediate --- ## Intent CQRS Command Query Responsibility Segregation - Separate the query side from the command side. ![alt text](./etc/cqrs.png "CQRS") ## Applicability Use the CQRS pattern when * you want to scale the queries and commands independently. * you want to use different data models for queries and commands. 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.cqrs.app; import java.math.BigInteger; import java.util.List; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.iluwatar.cqrs.commandes.CommandServiceImpl; import com.iluwatar.cqrs.commandes.ICommandService; import com.iluwatar.cqrs.dto.Author; import com.iluwatar.cqrs.dto.Book; import com.iluwatar.cqrs.queries.IQueryService; import com.iluwatar.cqrs.queries.QueryServiceImpl; import com.iluwatar.cqrs.util.HibernateUtil; /** * CQRS : Command Query Responsibility Segregation. A pattern used to separate query services from commands or writes * services. The pattern is very simple but it has many consequences. For example, it can be used to tackle down a * complex domain, or to use other architectures that were hard to implement with the classical way. * * This implementation is an example of managing books and authors in a library. The persistence of books and authors is * done according to the CQRS architecture. A command side that deals with a data model to persist(insert,update,delete) * objects to a database. And a query side that uses native queries to get data from the database and return objects as * DTOs (Data transfer Objects). * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args * command line args */ public static void main(String[] args) { ICommandService commands = new CommandServiceImpl(); // Create Authors and Books using CommandService commands.authorCreated("eEvans", "Eric Evans", "eEvans@email.com"); commands.authorCreated("jBloch", "Joshua Bloch", "jBloch@email.com"); commands.authorCreated("mFowler", "Martin Fowler", "mFowler@email.com"); commands.bookAddedToAuthor("Domain-Driven Design", 60.08, "eEvans"); commands.bookAddedToAuthor("Effective Java", 40.54, "jBloch"); commands.bookAddedToAuthor("Java Puzzlers", 39.99, "jBloch"); commands.bookAddedToAuthor("Java Concurrency in Practice", 29.40, "jBloch"); commands.bookAddedToAuthor("Patterns of Enterprise Application Architecture", 54.01, "mFowler"); commands.bookAddedToAuthor("Domain Specific Languages", 48.89, "mFowler"); commands.authorNameUpdated("eEvans", "Eric J. Evans"); IQueryService queries = new QueryServiceImpl(); // Query the database using QueryService Author nullAuthor = queries.getAuthorByUsername("username"); Author eEvans = queries.getAuthorByUsername("eEvans"); BigInteger jBlochBooksCount = queries.getAuthorBooksCount("jBloch"); BigInteger authorsCount = queries.getAuthorsCount(); Book dddBook = queries.getBook("Domain-Driven Design"); List jBlochBooks = queries.getAuthorBooks("jBloch"); LOGGER.info("Author username : {}", nullAuthor); LOGGER.info("Author eEvans : {}", eEvans); LOGGER.info("jBloch number of books : {}", jBlochBooksCount); LOGGER.info("Number of authors : {}", authorsCount); LOGGER.info("DDD book : {}", dddBook); LOGGER.info("jBloch books : {}", jBlochBooks); HibernateUtil.getSessionFactory().close(); } } java-design-patterns-1.18.0/cqrs/src/main/java/com/iluwatar/cqrs/commandes/000077500000000000000000000000001322244523500265615ustar00rootroot00000000000000java-design-patterns-1.18.0/cqrs/src/main/java/com/iluwatar/cqrs/commandes/CommandServiceImpl.java000066400000000000000000000115631322244523500331530ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.cqrs.commandes; import org.hibernate.Query; import org.hibernate.Session; import org.hibernate.SessionFactory; import com.iluwatar.cqrs.domain.model.Author; import com.iluwatar.cqrs.domain.model.Book; import com.iluwatar.cqrs.util.HibernateUtil; /** * This class is an implementation of {@link ICommandService} interface. It uses Hibernate as an api for persistence. * */ public class CommandServiceImpl implements ICommandService { private SessionFactory sessionFactory = HibernateUtil.getSessionFactory(); private Author getAuthorByUsername(String username) { Author author = null; try (Session session = sessionFactory.openSession()) { Query query = session.createQuery("from Author where username=:username"); query.setParameter("username", username); author = (Author) query.uniqueResult(); } if (author == null) { HibernateUtil.getSessionFactory().close(); throw new NullPointerException("Author " + username + " doesn't exist!"); } return author; } private Book getBookByTitle(String title) { Book book = null; try (Session session = sessionFactory.openSession()) { Query query = session.createQuery("from Book where title=:title"); query.setParameter("title", title); book = (Book) query.uniqueResult(); } if (book == null) { HibernateUtil.getSessionFactory().close(); throw new NullPointerException("Book " + title + " doesn't exist!"); } return book; } @Override public void authorCreated(String username, String name, String email) { Author author = new Author(username, name, email); try (Session session = sessionFactory.openSession()) { session.beginTransaction(); session.save(author); session.getTransaction().commit(); } } @Override public void bookAddedToAuthor(String title, double price, String username) { Author author = getAuthorByUsername(username); Book book = new Book(title, price, author); try (Session session = sessionFactory.openSession()) { session.beginTransaction(); session.save(book); session.getTransaction().commit(); } } @Override public void authorNameUpdated(String username, String name) { Author author = getAuthorByUsername(username); author.setName(name); try (Session session = sessionFactory.openSession()) { session.beginTransaction(); session.update(author); session.getTransaction().commit(); } } @Override public void authorUsernameUpdated(String oldUsername, String newUsername) { Author author = getAuthorByUsername(oldUsername); author.setUsername(newUsername); try (Session session = sessionFactory.openSession()) { session.beginTransaction(); session.update(author); session.getTransaction().commit(); } } @Override public void authorEmailUpdated(String username, String email) { Author author = getAuthorByUsername(username); author.setEmail(email); try (Session session = sessionFactory.openSession()) { session.beginTransaction(); session.update(author); session.getTransaction().commit(); } } @Override public void bookTitleUpdated(String oldTitle, String newTitle) { Book book = getBookByTitle(oldTitle); book.setTitle(newTitle); try (Session session = sessionFactory.openSession()) { session.beginTransaction(); session.update(book); session.getTransaction().commit(); } } @Override public void bookPriceUpdated(String title, double price) { Book book = getBookByTitle(title); book.setPrice(price); try (Session session = sessionFactory.openSession()) { session.beginTransaction(); session.update(book); session.getTransaction().commit(); } } } java-design-patterns-1.18.0/cqrs/src/main/java/com/iluwatar/cqrs/commandes/ICommandService.java000066400000000000000000000033011322244523500324310ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.cqrs.commandes; /** * This interface represents the commands of the CQRS pattern * */ public interface ICommandService { void authorCreated(String username, String name, String email); void bookAddedToAuthor(String title, double price, String username); void authorNameUpdated(String username, String name); void authorUsernameUpdated(String oldUsername, String newUsername); void authorEmailUpdated(String username, String email); void bookTitleUpdated(String oldTitle, String newTitle); void bookPriceUpdated(String title, double price); } java-design-patterns-1.18.0/cqrs/src/main/java/com/iluwatar/cqrs/domain/000077500000000000000000000000001322244523500260625ustar00rootroot00000000000000java-design-patterns-1.18.0/cqrs/src/main/java/com/iluwatar/cqrs/domain/model/000077500000000000000000000000001322244523500271625ustar00rootroot00000000000000java-design-patterns-1.18.0/cqrs/src/main/java/com/iluwatar/cqrs/domain/model/Author.java000066400000000000000000000047621322244523500313000ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.cqrs.domain.model; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; /** * This is an Author entity. It is used by Hibernate for persistence. * */ @Entity public class Author { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private long id; private String username; private String name; private String email; /** * * @param username * username of the author * @param name * name of the author * @param email * email of the author */ public Author(String username, String name, String email) { super(); this.username = username; this.name = name; this.email = email; } protected Author() { super(); } public long getId() { return id; } public void setId(long id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } @Override public String toString() { return "Author [name=" + name + ", email=" + email + "]"; } } java-design-patterns-1.18.0/cqrs/src/main/java/com/iluwatar/cqrs/domain/model/Book.java000066400000000000000000000051171322244523500307230ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.cqrs.domain.model; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.ManyToOne; /** * This is a Book entity. It is used by Hibernate for persistence. Many books can be written by one {@link Author} * */ @Entity public class Book { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private long id; private String title; private double price; @ManyToOne private Author author; /** * * @param title * title of the book * @param price * price of the book * @param author * author of the book */ public Book(String title, double price, Author author) { super(); this.title = title; this.price = price; this.author = author; } protected Book() { super(); } public long getId() { return id; } public void setId(long id) { this.id = id; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public double getPrice() { return price; } public void setPrice(double price) { this.price = price; } public Author getAuthor() { return author; } public void setAuthor(Author author) { this.author = author; } @Override public String toString() { return "Book [title=" + title + ", price=" + price + ", author=" + author + "]"; } } java-design-patterns-1.18.0/cqrs/src/main/java/com/iluwatar/cqrs/dto/000077500000000000000000000000001322244523500254015ustar00rootroot00000000000000java-design-patterns-1.18.0/cqrs/src/main/java/com/iluwatar/cqrs/dto/Author.java000066400000000000000000000046651322244523500275210ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.cqrs.dto; import java.util.Objects; /** * * This is a DTO (Data Transfer Object) author, contains only useful information to be returned * */ public class Author { private String name; private String email; private String username; /** * * @param name * name of the author * @param email * email of the author * @param username * username of the author */ public Author(String name, String email, String username) { super(); this.name = name; this.email = email; this.username = username; } public Author() { super(); } public String getName() { return name; } public String getEmail() { return email; } public String getUsername() { return username; } @Override public String toString() { return "AuthorDTO [name=" + name + ", email=" + email + ", username=" + username + "]"; } @Override public int hashCode() { return Objects.hash(username, name, email); } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (!(obj instanceof Author)) { return false; } Author other = (Author) obj; return username.equals(other.getUsername()) && email.equals(other.getEmail()) && name.equals(other.getName()); } } java-design-patterns-1.18.0/cqrs/src/main/java/com/iluwatar/cqrs/dto/Book.java000066400000000000000000000042321322244523500271370ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.cqrs.dto; import java.util.Objects; /** * * This is a DTO (Data Transfer Object) book, contains only useful information to be returned * */ public class Book { private String title; private double price; /** * * @param title * title of the book * @param price * price of the book */ public Book(String title, double price) { super(); this.title = title; this.price = price; } public Book() { super(); } public String getTitle() { return title; } public double getPrice() { return price; } @Override public String toString() { return "BookDTO [title=" + title + ", price=" + price + "]"; } @Override public int hashCode() { return Objects.hash(title, price); } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (!(obj instanceof Book)) { return false; } Book book = (Book) obj; return title.equals(book.getTitle()) && price == book.getPrice(); } } java-design-patterns-1.18.0/cqrs/src/main/java/com/iluwatar/cqrs/queries/000077500000000000000000000000001322244523500262705ustar00rootroot00000000000000java-design-patterns-1.18.0/cqrs/src/main/java/com/iluwatar/cqrs/queries/IQueryService.java000066400000000000000000000031371322244523500316760ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.cqrs.queries; import java.math.BigInteger; import java.util.List; import com.iluwatar.cqrs.dto.Author; import com.iluwatar.cqrs.dto.Book; /** * * This interface represents the query methods of the CQRS pattern * */ public interface IQueryService { Author getAuthorByUsername(String username); Book getBook(String title); List getAuthorBooks(String username); BigInteger getAuthorBooksCount(String username); BigInteger getAuthorsCount(); } java-design-patterns-1.18.0/cqrs/src/main/java/com/iluwatar/cqrs/queries/QueryServiceImpl.java000066400000000000000000000100071322244523500324010ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.cqrs.queries; import java.math.BigInteger; import java.util.List; import org.hibernate.SQLQuery; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.transform.Transformers; import com.iluwatar.cqrs.dto.Author; import com.iluwatar.cqrs.dto.Book; import com.iluwatar.cqrs.util.HibernateUtil; /** * This class is an implementation of {@link IQueryService}. It uses Hibernate native queries to return DTOs from the * database. * */ public class QueryServiceImpl implements IQueryService { private SessionFactory sessionFactory = HibernateUtil.getSessionFactory(); @Override public Author getAuthorByUsername(String username) { Author authorDTo = null; try (Session session = sessionFactory.openSession()) { SQLQuery sqlQuery = session .createSQLQuery("SELECT a.username as \"username\", a.name as \"name\", a.email as \"email\"" + "FROM Author a where a.username=:username"); sqlQuery.setParameter("username", username); authorDTo = (Author) sqlQuery.setResultTransformer(Transformers.aliasToBean(Author.class)).uniqueResult(); } return authorDTo; } @Override public Book getBook(String title) { Book bookDTo = null; try (Session session = sessionFactory.openSession()) { SQLQuery sqlQuery = session .createSQLQuery("SELECT b.title as \"title\", b.price as \"price\"" + " FROM Book b where b.title=:title"); sqlQuery.setParameter("title", title); bookDTo = (Book) sqlQuery.setResultTransformer(Transformers.aliasToBean(Book.class)).uniqueResult(); } return bookDTo; } @Override public List getAuthorBooks(String username) { List bookDTos = null; try (Session session = sessionFactory.openSession()) { SQLQuery sqlQuery = session.createSQLQuery("SELECT b.title as \"title\", b.price as \"price\"" + " FROM Author a , Book b where b.author_id = a.id and a.username=:username"); sqlQuery.setParameter("username", username); bookDTos = sqlQuery.setResultTransformer(Transformers.aliasToBean(Book.class)).list(); } return bookDTos; } @Override public BigInteger getAuthorBooksCount(String username) { BigInteger bookcount = null; try (Session session = sessionFactory.openSession()) { SQLQuery sqlQuery = session.createSQLQuery( "SELECT count(b.title)" + " FROM Book b, Author a where b.author_id = a.id and a.username=:username"); sqlQuery.setParameter("username", username); bookcount = (BigInteger) sqlQuery.uniqueResult(); } return bookcount; } @Override public BigInteger getAuthorsCount() { BigInteger authorcount = null; try (Session session = sessionFactory.openSession()) { SQLQuery sqlQuery = session.createSQLQuery("SELECT count(id) from Author"); authorcount = (BigInteger) sqlQuery.uniqueResult(); } return authorcount; } } java-design-patterns-1.18.0/cqrs/src/main/java/com/iluwatar/cqrs/util/000077500000000000000000000000001322244523500255705ustar00rootroot00000000000000java-design-patterns-1.18.0/cqrs/src/main/java/com/iluwatar/cqrs/util/HibernateUtil.java000066400000000000000000000044651322244523500312030ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.cqrs.util; import org.hibernate.SessionFactory; import org.hibernate.boot.MetadataSources; import org.hibernate.boot.registry.StandardServiceRegistry; import org.hibernate.boot.registry.StandardServiceRegistryBuilder; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * This class simply returns one instance of {@link SessionFactory} initialized when the application is started * */ public class HibernateUtil { private static final SessionFactory SESSIONFACTORY = buildSessionFactory(); private static final Logger LOGGER = LoggerFactory.getLogger(HibernateUtil.class); private static SessionFactory buildSessionFactory() { // configures settings from hibernate.cfg.xml final StandardServiceRegistry registry = new StandardServiceRegistryBuilder().configure().build(); try { return new MetadataSources(registry).buildMetadata().buildSessionFactory(); } catch (Exception ex) { StandardServiceRegistryBuilder.destroy(registry); LOGGER.error("Initial SessionFactory creation failed." + ex); throw new ExceptionInInitializerError(ex); } } public static SessionFactory getSessionFactory() { return SESSIONFACTORY; } } java-design-patterns-1.18.0/cqrs/src/main/resources/000077500000000000000000000000001322244523500223265ustar00rootroot00000000000000java-design-patterns-1.18.0/cqrs/src/main/resources/hibernate.cfg.xml000066400000000000000000000035031322244523500255500ustar00rootroot00000000000000 org.hibernate.dialect.H2Dialect org.h2.Driver jdbc:h2:mem:test sa create java-design-patterns-1.18.0/cqrs/src/main/resources/logback.xml000066400000000000000000000027701322244523500244600ustar00rootroot00000000000000 %d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n java-design-patterns-1.18.0/cqrs/src/test/000077500000000000000000000000001322244523500203475ustar00rootroot00000000000000java-design-patterns-1.18.0/cqrs/src/test/java/000077500000000000000000000000001322244523500212705ustar00rootroot00000000000000java-design-patterns-1.18.0/cqrs/src/test/java/com/000077500000000000000000000000001322244523500220465ustar00rootroot00000000000000java-design-patterns-1.18.0/cqrs/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500236765ustar00rootroot00000000000000java-design-patterns-1.18.0/cqrs/src/test/java/com/iluwatar/cqrs/000077500000000000000000000000001322244523500246465ustar00rootroot00000000000000java-design-patterns-1.18.0/cqrs/src/test/java/com/iluwatar/cqrs/IntegrationTest.java000066400000000000000000000100311322244523500306270ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.cqrs; import java.math.BigInteger; import java.util.List; import com.iluwatar.cqrs.commandes.CommandServiceImpl; import com.iluwatar.cqrs.commandes.ICommandService; import com.iluwatar.cqrs.dto.Author; import com.iluwatar.cqrs.dto.Book; import com.iluwatar.cqrs.queries.IQueryService; import com.iluwatar.cqrs.queries.QueryServiceImpl; import org.junit.jupiter.api.BeforeAll; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Integration test of IQueryService and ICommandService with h2 data * */ public class IntegrationTest { private static IQueryService queryService; private static ICommandService commandService; @BeforeAll public static void initializeAndPopulateDatabase() { commandService = new CommandServiceImpl(); queryService = new QueryServiceImpl(); // create first author1 commandService.authorCreated("username1", "name1", "email1"); // create author1 and update all its data commandService.authorCreated("username2", "name2", "email2"); commandService.authorEmailUpdated("username2", "new_email2"); commandService.authorNameUpdated("username2", "new_name2"); commandService.authorUsernameUpdated("username2", "new_username2"); // add book1 to author1 commandService.bookAddedToAuthor("title1", 10, "username1"); // add book2 to author1 and update all its data commandService.bookAddedToAuthor("title2", 20, "username1"); commandService.bookPriceUpdated("title2", 30); commandService.bookTitleUpdated("title2", "new_title2"); } @Test public void testGetAuthorByUsername() { Author author = queryService.getAuthorByUsername("username1"); assertEquals("username1", author.getUsername()); assertEquals("name1", author.getName()); assertEquals("email1", author.getEmail()); } @Test public void testGetUpdatedAuthorByUsername() { Author author = queryService.getAuthorByUsername("new_username2"); Author expectedAuthor = new Author("new_name2", "new_email2", "new_username2"); assertEquals(expectedAuthor, author); } @Test public void testGetBook() { Book book = queryService.getBook("title1"); assertEquals("title1", book.getTitle()); assertEquals(10, book.getPrice(), 0.01); } @Test public void testGetAuthorBooks() { List books = queryService.getAuthorBooks("username1"); assertTrue(books.size() == 2); assertTrue(books.contains(new Book("title1", 10))); assertTrue(books.contains(new Book("new_title2", 30))); } @Test public void testGetAuthorBooksCount() { BigInteger bookCount = queryService.getAuthorBooksCount("username1"); assertEquals(new BigInteger("2"), bookCount); } @Test public void testGetAuthorsCount() { BigInteger authorCount = queryService.getAuthorsCount(); assertEquals(new BigInteger("2"), authorCount); } } java-design-patterns-1.18.0/cqrs/src/test/resources/000077500000000000000000000000001322244523500223615ustar00rootroot00000000000000java-design-patterns-1.18.0/cqrs/src/test/resources/hibernate.cfg.xml000066400000000000000000000035031322244523500256030ustar00rootroot00000000000000 org.hibernate.dialect.H2Dialect org.h2.Driver jdbc:h2:mem:test sa create java-design-patterns-1.18.0/cqrs/src/test/resources/logback.xml000066400000000000000000000027701322244523500245130ustar00rootroot00000000000000 %d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n java-design-patterns-1.18.0/dao/000077500000000000000000000000001322244523500163745ustar00rootroot00000000000000java-design-patterns-1.18.0/dao/README.md000066400000000000000000000012141322244523500176510ustar00rootroot00000000000000--- layout: pattern title: Data Access Object folder: dao permalink: /patterns/dao/ categories: Persistence Tier tags: - Java - Difficulty-Beginner --- ## Intent Object provides an abstract interface to some type of database or other persistence mechanism. ![alt text](./etc/dao.png "Data Access Object") ## Applicability Use the Data Access Object in any of the following situations * when you want to consolidate how the data layer is accessed * when you want to avoid writing multiple data retrieval/persistence layers ## Credits * [J2EE Design Patterns](http://www.amazon.com/J2EE-Design-Patterns-William-Crawford/dp/0596004273/ref=sr_1_2) java-design-patterns-1.18.0/dao/etc/000077500000000000000000000000001322244523500171475ustar00rootroot00000000000000java-design-patterns-1.18.0/dao/etc/dao.png000066400000000000000000001155471322244523500204350ustar00rootroot00000000000000PNG  IHDRVX.IDATx XѫF . 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TNyX!%(~|9(͢HC;E>zz: M_߭l*Ł`oFIyގh⊓#Hsz! %(k,ւNy( BS=a{ 0 OӇ&&&"6 Fy٧ǨQBe zzH{;D*,\tm@xұco4 nٹ%"ܫuZ^F~Ps'ODbE|6ډ'(Bĕ&A  G;שQiDTzz: M_ߍu˭[{0 6jT>d{z1:\>sfQ~u~@3XK%6viT"4' NyMyQx4ݘ>41/6176)7 a0@.x.qٹ%:|%\O~vMCuv!`@[Ku޼ҫ^*~}x{JW?eJ0nnDB !pbBKZիW'3 'NujTZJ:-Oo۶93v;9AT8pCW-oʃ 2A9wȴ=qۢf;8k֘$Ug Zzu[b8HX}/AeC_81;YI S Jw WifE0=8a8+┇!%('Hu LNyΊ8a{ 0 故 azЯAJB0=WI^ ye!A$}/AFҼ LU @i^Y@*IKQ4',frJJO^ ]ADyqB0mHDE]AAAAA PAA*̩IeuIENDB`java-design-patterns-1.18.0/dao/etc/dao.ucls000066400000000000000000000110761322244523500206070ustar00rootroot00000000000000 java-design-patterns-1.18.0/dao/pom.xml000066400000000000000000000070611322244523500177150ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 dao org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test log4j log4j com.h2database h2 org.mockito mockito-core src/main/resources src/main/resources log4j.xml .. org.apache.maven.plugins maven-jar-plugin 2.6 log4j.xml true java-design-patterns-1.18.0/dao/src/000077500000000000000000000000001322244523500171635ustar00rootroot00000000000000java-design-patterns-1.18.0/dao/src/main/000077500000000000000000000000001322244523500201075ustar00rootroot00000000000000java-design-patterns-1.18.0/dao/src/main/java/000077500000000000000000000000001322244523500210305ustar00rootroot00000000000000java-design-patterns-1.18.0/dao/src/main/java/com/000077500000000000000000000000001322244523500216065ustar00rootroot00000000000000java-design-patterns-1.18.0/dao/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500234365ustar00rootroot00000000000000java-design-patterns-1.18.0/dao/src/main/java/com/iluwatar/dao/000077500000000000000000000000001322244523500242015ustar00rootroot00000000000000java-design-patterns-1.18.0/dao/src/main/java/com/iluwatar/dao/App.java000066400000000000000000000122121322244523500255620ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dao; import java.sql.Connection; import java.sql.SQLException; import java.sql.Statement; import java.util.ArrayList; import java.util.List; import java.util.stream.Stream; import javax.sql.DataSource; import org.apache.log4j.Logger; import org.h2.jdbcx.JdbcDataSource; /** * Data Access Object (DAO) is an object that provides an abstract interface to some type of * database or other persistence mechanism. By mapping application calls to the persistence layer, * DAO provide some specific data operations without exposing details of the database. This * isolation supports the Single responsibility principle. It separates what data accesses the * application needs, in terms of domain-specific objects and data types (the public interface of * the DAO), from how these needs can be satisfied with a specific DBMS. * *

With the DAO pattern, we can use various method calls to retrieve/add/delete/update data * without directly interacting with the data source. The below example demonstrates basic CRUD * operations: select, add, update, and delete. * * */ public class App { private static final String DB_URL = "jdbc:h2:~/dao"; private static Logger log = Logger.getLogger(App.class); /** * Program entry point. * * @param args command line args. * @throws Exception if any error occurs. */ public static void main(final String[] args) throws Exception { final CustomerDao inMemoryDao = new InMemoryCustomerDao(); performOperationsUsing(inMemoryDao); final DataSource dataSource = createDataSource(); createSchema(dataSource); final CustomerDao dbDao = new DbCustomerDao(dataSource); performOperationsUsing(dbDao); deleteSchema(dataSource); } private static void deleteSchema(DataSource dataSource) throws SQLException { try (Connection connection = dataSource.getConnection(); Statement statement = connection.createStatement()) { statement.execute(CustomerSchemaSql.DELETE_SCHEMA_SQL); } } private static void createSchema(DataSource dataSource) throws SQLException { try (Connection connection = dataSource.getConnection(); Statement statement = connection.createStatement()) { statement.execute(CustomerSchemaSql.CREATE_SCHEMA_SQL); } } private static DataSource createDataSource() { JdbcDataSource dataSource = new JdbcDataSource(); dataSource.setURL(DB_URL); return dataSource; } private static void performOperationsUsing(final CustomerDao customerDao) throws Exception { addCustomers(customerDao); log.info("customerDao.getAllCustomers(): "); try (Stream customerStream = customerDao.getAll()) { customerStream.forEach((customer) -> log.info(customer)); } log.info("customerDao.getCustomerById(2): " + customerDao.getById(2)); final Customer customer = new Customer(4, "Dan", "Danson"); customerDao.add(customer); log.info("customerDao.getAllCustomers(): " + customerDao.getAll()); customer.setFirstName("Daniel"); customer.setLastName("Danielson"); customerDao.update(customer); log.info("customerDao.getAllCustomers(): "); try (Stream customerStream = customerDao.getAll()) { customerStream.forEach((cust) -> log.info(cust)); } customerDao.delete(customer); log.info("customerDao.getAllCustomers(): " + customerDao.getAll()); } private static void addCustomers(CustomerDao customerDao) throws Exception { for (Customer customer : generateSampleCustomers()) { customerDao.add(customer); } } /** * Generate customers. * * @return list of customers. */ public static List generateSampleCustomers() { final Customer customer1 = new Customer(1, "Adam", "Adamson"); final Customer customer2 = new Customer(2, "Bob", "Bobson"); final Customer customer3 = new Customer(3, "Carl", "Carlson"); final List customers = new ArrayList<>(); customers.add(customer1); customers.add(customer2); customers.add(customer3); return customers; } } java-design-patterns-1.18.0/dao/src/main/java/com/iluwatar/dao/CustomException.java000066400000000000000000000030051322244523500301730ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dao; /** * * Custom exception * */ public class CustomException extends Exception { private static final long serialVersionUID = 1L; public CustomException() {} public CustomException(String message) { super(message); } public CustomException(String message, Throwable cause) { super(message, cause); } } java-design-patterns-1.18.0/dao/src/main/java/com/iluwatar/dao/Customer.java000066400000000000000000000050201322244523500266420ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dao; /** * A customer POJO that represents the data that will be read from the data source. * */ public class Customer { private int id; private String firstName; private String lastName; /** * Creates an instance of customer. */ public Customer(final int id, final String firstName, final String lastName) { this.id = id; this.firstName = firstName; this.lastName = lastName; } public int getId() { return id; } public void setId(final int id) { this.id = id; } public String getFirstName() { return firstName; } public void setFirstName(final String firstName) { this.firstName = firstName; } public String getLastName() { return lastName; } public void setLastName(final String lastName) { this.lastName = lastName; } @Override public String toString() { return "Customer{" + "id=" + getId() + ", firstName='" + getFirstName() + '\'' + ", lastName='" + getLastName() + '\'' + '}'; } @Override public boolean equals(final Object that) { boolean isEqual = false; if (this == that) { isEqual = true; } else if (that != null && getClass() == that.getClass()) { final Customer customer = (Customer) that; if (getId() == customer.getId()) { isEqual = true; } } return isEqual; } @Override public int hashCode() { return getId(); } } java-design-patterns-1.18.0/dao/src/main/java/com/iluwatar/dao/CustomerDao.java000066400000000000000000000065161322244523500273010ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dao; import java.util.Optional; import java.util.stream.Stream; /** * In an application the Data Access Object (DAO) is a part of Data access layer. It is an object * that provides an interface to some type of persistence mechanism. By mapping application calls * to the persistence layer, DAO provides some specific data operations without exposing details * of the database. This isolation supports the Single responsibility principle. It separates what * data accesses the application needs, in terms of domain-specific objects and data types * (the public interface of the DAO), from how these needs can be satisfied with a specific DBMS, * database schema, etc. * *

Any change in the way data is stored and retrieved will not change the client code as the * client will be using interface and need not worry about exact source. * * @see InMemoryCustomerDao * @see DbCustomerDao */ public interface CustomerDao { /** * @return all the customers as a stream. The stream may be lazily or eagerly evaluated based * on the implementation. The stream must be closed after use. * @throws Exception if any error occurs. */ Stream getAll() throws Exception; /** * @param id unique identifier of the customer. * @return an optional with customer if a customer with unique identifier id * exists, empty optional otherwise. * @throws Exception if any error occurs. */ Optional getById(int id) throws Exception; /** * @param customer the customer to be added. * @return true if customer is successfully added, false if customer already exists. * @throws Exception if any error occurs. */ boolean add(Customer customer) throws Exception; /** * @param customer the customer to be updated. * @return true if customer exists and is successfully updated, false otherwise. * @throws Exception if any error occurs. */ boolean update(Customer customer) throws Exception; /** * @param customer the customer to be deleted. * @return true if customer exists and is successfully deleted, false otherwise. * @throws Exception if any error occurs. */ boolean delete(Customer customer) throws Exception; } java-design-patterns-1.18.0/dao/src/main/java/com/iluwatar/dao/CustomerSchemaSql.java000066400000000000000000000027321322244523500304520ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dao; /** * Customer Schema SQL Class */ public final class CustomerSchemaSql { private CustomerSchemaSql() {} public static final String CREATE_SCHEMA_SQL = "CREATE TABLE CUSTOMERS (ID NUMBER, FNAME VARCHAR(100), " + "LNAME VARCHAR(100))"; public static final String DELETE_SCHEMA_SQL = "DROP TABLE CUSTOMERS"; } java-design-patterns-1.18.0/dao/src/main/java/com/iluwatar/dao/DbCustomerDao.java000066400000000000000000000143221322244523500275410ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dao; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.util.Optional; import java.util.Spliterator; import java.util.Spliterators; import java.util.function.Consumer; import java.util.stream.Stream; import java.util.stream.StreamSupport; import javax.sql.DataSource; import org.apache.log4j.Logger; /** * An implementation of {@link CustomerDao} that persists customers in RDBMS. * */ public class DbCustomerDao implements CustomerDao { private static final Logger LOGGER = Logger.getLogger(DbCustomerDao.class); private final DataSource dataSource; /** * Creates an instance of {@link DbCustomerDao} which uses provided dataSource * to store and retrieve customer information. * * @param dataSource a non-null dataSource. */ public DbCustomerDao(DataSource dataSource) { this.dataSource = dataSource; } /** * @return a lazily populated stream of customers. Note the stream returned must be closed to * free all the acquired resources. The stream keeps an open connection to the database till * it is complete or is closed manually. */ @Override public Stream getAll() throws Exception { Connection connection; try { connection = getConnection(); PreparedStatement statement = connection.prepareStatement("SELECT * FROM CUSTOMERS"); // NOSONAR ResultSet resultSet = statement.executeQuery(); // NOSONAR return StreamSupport.stream(new Spliterators.AbstractSpliterator(Long.MAX_VALUE, Spliterator.ORDERED) { @Override public boolean tryAdvance(Consumer action) { try { if (!resultSet.next()) { return false; } action.accept(createCustomer(resultSet)); return true; } catch (SQLException e) { throw new RuntimeException(e); // NOSONAR } } }, false).onClose(() -> mutedClose(connection, statement, resultSet)); } catch (SQLException e) { throw new CustomException(e.getMessage(), e); } } private Connection getConnection() throws SQLException { return dataSource.getConnection(); } private void mutedClose(Connection connection, PreparedStatement statement, ResultSet resultSet) { try { resultSet.close(); statement.close(); connection.close(); } catch (SQLException e) { LOGGER.info("Exception thrown " + e.getMessage()); } } private Customer createCustomer(ResultSet resultSet) throws SQLException { return new Customer(resultSet.getInt("ID"), resultSet.getString("FNAME"), resultSet.getString("LNAME")); } /** * {@inheritDoc} */ @Override public Optional getById(int id) throws Exception { ResultSet resultSet = null; try (Connection connection = getConnection(); PreparedStatement statement = connection.prepareStatement("SELECT * FROM CUSTOMERS WHERE ID = ?")) { statement.setInt(1, id); resultSet = statement.executeQuery(); if (resultSet.next()) { return Optional.of(createCustomer(resultSet)); } else { return Optional.empty(); } } catch (SQLException ex) { throw new CustomException(ex.getMessage(), ex); } finally { if (resultSet != null) { resultSet.close(); } } } /** * {@inheritDoc} */ @Override public boolean add(Customer customer) throws Exception { if (getById(customer.getId()).isPresent()) { return false; } try (Connection connection = getConnection(); PreparedStatement statement = connection.prepareStatement("INSERT INTO CUSTOMERS VALUES (?,?,?)")) { statement.setInt(1, customer.getId()); statement.setString(2, customer.getFirstName()); statement.setString(3, customer.getLastName()); statement.execute(); return true; } catch (SQLException ex) { throw new CustomException(ex.getMessage(), ex); } } /** * {@inheritDoc} */ @Override public boolean update(Customer customer) throws Exception { try (Connection connection = getConnection(); PreparedStatement statement = connection.prepareStatement("UPDATE CUSTOMERS SET FNAME = ?, LNAME = ? WHERE ID = ?")) { statement.setString(1, customer.getFirstName()); statement.setString(2, customer.getLastName()); statement.setInt(3, customer.getId()); return statement.executeUpdate() > 0; } catch (SQLException ex) { throw new CustomException(ex.getMessage(), ex); } } /** * {@inheritDoc} */ @Override public boolean delete(Customer customer) throws Exception { try (Connection connection = getConnection(); PreparedStatement statement = connection.prepareStatement("DELETE FROM CUSTOMERS WHERE ID = ?")) { statement.setInt(1, customer.getId()); return statement.executeUpdate() > 0; } catch (SQLException ex) { throw new CustomException(ex.getMessage(), ex); } } } java-design-patterns-1.18.0/dao/src/main/java/com/iluwatar/dao/InMemoryCustomerDao.java000066400000000000000000000045521322244523500307570ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dao; import java.util.HashMap; import java.util.Map; import java.util.Optional; import java.util.stream.Stream; /** * An in memory implementation of {@link CustomerDao}, which stores the customers in JVM memory * and data is lost when the application exits. *
* This implementation is useful as temporary database or for testing. */ public class InMemoryCustomerDao implements CustomerDao { private Map idToCustomer = new HashMap<>(); /** * An eagerly evaluated stream of customers stored in memory. */ @Override public Stream getAll() { return idToCustomer.values().stream(); } @Override public Optional getById(final int id) { return Optional.ofNullable(idToCustomer.get(id)); } @Override public boolean add(final Customer customer) { if (getById(customer.getId()).isPresent()) { return false; } idToCustomer.put(customer.getId(), customer); return true; } @Override public boolean update(final Customer customer) { return idToCustomer.replace(customer.getId(), customer) != null; } @Override public boolean delete(final Customer customer) { return idToCustomer.remove(customer.getId()) != null; } } java-design-patterns-1.18.0/dao/src/main/resources/000077500000000000000000000000001322244523500221215ustar00rootroot00000000000000java-design-patterns-1.18.0/dao/src/main/resources/log4j.xml000066400000000000000000000032221322244523500236610ustar00rootroot00000000000000 java-design-patterns-1.18.0/dao/src/test/000077500000000000000000000000001322244523500201425ustar00rootroot00000000000000java-design-patterns-1.18.0/dao/src/test/java/000077500000000000000000000000001322244523500210635ustar00rootroot00000000000000java-design-patterns-1.18.0/dao/src/test/java/com/000077500000000000000000000000001322244523500216415ustar00rootroot00000000000000java-design-patterns-1.18.0/dao/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500234715ustar00rootroot00000000000000java-design-patterns-1.18.0/dao/src/test/java/com/iluwatar/dao/000077500000000000000000000000001322244523500242345ustar00rootroot00000000000000java-design-patterns-1.18.0/dao/src/test/java/com/iluwatar/dao/AppTest.java000066400000000000000000000025511322244523500264620ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dao; import org.junit.jupiter.api.Test; /** * Tests that DAO example runs without errors. */ public class AppTest { @Test public void test() throws Exception { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/dao/src/test/java/com/iluwatar/dao/CustomerTest.java000066400000000000000000000063271322244523500275500ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dao; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotEquals; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; /** * Tests {@link Customer}. */ public class CustomerTest { private Customer customer; private static final int ID = 1; private static final String FIRSTNAME = "Winston"; private static final String LASTNAME = "Churchill"; @BeforeEach public void setUp() { customer = new Customer(ID, FIRSTNAME, LASTNAME); } @Test public void getAndSetId() { final int newId = 2; customer.setId(newId); assertEquals(newId, customer.getId()); } @Test public void getAndSetFirstname() { final String newFirstname = "Bill"; customer.setFirstName(newFirstname); assertEquals(newFirstname, customer.getFirstName()); } @Test public void getAndSetLastname() { final String newLastname = "Clinton"; customer.setLastName(newLastname); assertEquals(newLastname, customer.getLastName()); } @Test public void notEqualWithDifferentId() { final int newId = 2; final Customer otherCustomer = new Customer(newId, FIRSTNAME, LASTNAME); assertNotEquals(customer, otherCustomer); assertNotEquals(customer.hashCode(), otherCustomer.hashCode()); } @Test public void equalsWithSameObjectValues() { final Customer otherCustomer = new Customer(ID, FIRSTNAME, LASTNAME); assertEquals(customer, otherCustomer); assertEquals(customer.hashCode(), otherCustomer.hashCode()); } @Test public void equalsWithSameObjects() { assertEquals(customer, customer); assertEquals(customer.hashCode(), customer.hashCode()); } @Test public void testToString() { final StringBuffer buffer = new StringBuffer(); buffer.append("Customer{id=") .append("" + customer.getId()) .append(", firstName='") .append(customer.getFirstName()) .append("\', lastName='") .append(customer.getLastName() + "\'}"); assertEquals(buffer.toString(), customer.toString()); } } java-design-patterns-1.18.0/dao/src/test/java/com/iluwatar/dao/DbCustomerDaoTest.java000066400000000000000000000220601322244523500304320ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dao; import org.h2.jdbcx.JdbcDataSource; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Nested; import org.junit.jupiter.api.Test; import org.mockito.Mockito; import javax.sql.DataSource; import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; import java.sql.Statement; import java.util.stream.Stream; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertThrows; import static org.junit.jupiter.api.Assertions.assertTrue; import static org.junit.jupiter.api.Assumptions.assumeTrue; import static org.mockito.Mockito.doReturn; import static org.mockito.Mockito.doThrow; import static org.mockito.Mockito.mock; /** * Tests {@link DbCustomerDao}. */ public class DbCustomerDaoTest { private static final String DB_URL = "jdbc:h2:~/dao"; private DbCustomerDao dao; private Customer existingCustomer = new Customer(1, "Freddy", "Krueger"); /** * Creates customers schema. * @throws SQLException if there is any error while creating schema. */ @BeforeEach public void createSchema() throws SQLException { try (Connection connection = DriverManager.getConnection(DB_URL); Statement statement = connection.createStatement()) { statement.execute(CustomerSchemaSql.CREATE_SCHEMA_SQL); } } /** * Represents the scenario where DB connectivity is present. */ @Nested public class ConnectionSuccess { /** * Setup for connection success scenario. * @throws Exception if any error occurs. */ @BeforeEach public void setUp() throws Exception { JdbcDataSource dataSource = new JdbcDataSource(); dataSource.setURL(DB_URL); dao = new DbCustomerDao(dataSource); boolean result = dao.add(existingCustomer); assertTrue(result); } /** * Represents the scenario when DAO operations are being performed on a non existing customer. */ @Nested public class NonExistingCustomer { @Test public void addingShouldResultInSuccess() throws Exception { try (Stream allCustomers = dao.getAll()) { assumeTrue(allCustomers.count() == 1); } final Customer nonExistingCustomer = new Customer(2, "Robert", "Englund"); boolean result = dao.add(nonExistingCustomer); assertTrue(result); assertCustomerCountIs(2); assertEquals(nonExistingCustomer, dao.getById(nonExistingCustomer.getId()).get()); } @Test public void deletionShouldBeFailureAndNotAffectExistingCustomers() throws Exception { final Customer nonExistingCustomer = new Customer(2, "Robert", "Englund"); boolean result = dao.delete(nonExistingCustomer); assertFalse(result); assertCustomerCountIs(1); } @Test public void updationShouldBeFailureAndNotAffectExistingCustomers() throws Exception { final int nonExistingId = getNonExistingCustomerId(); final String newFirstname = "Douglas"; final String newLastname = "MacArthur"; final Customer customer = new Customer(nonExistingId, newFirstname, newLastname); boolean result = dao.update(customer); assertFalse(result); assertFalse(dao.getById(nonExistingId).isPresent()); } @Test public void retrieveShouldReturnNoCustomer() throws Exception { assertFalse(dao.getById(getNonExistingCustomerId()).isPresent()); } } /** * Represents a scenario where DAO operations are being performed on an already existing * customer. * */ @Nested public class ExistingCustomer { @Test public void addingShouldResultInFailureAndNotAffectExistingCustomers() throws Exception { Customer existingCustomer = new Customer(1, "Freddy", "Krueger"); boolean result = dao.add(existingCustomer); assertFalse(result); assertCustomerCountIs(1); assertEquals(existingCustomer, dao.getById(existingCustomer.getId()).get()); } @Test public void deletionShouldBeSuccessAndCustomerShouldBeNonAccessible() throws Exception { boolean result = dao.delete(existingCustomer); assertTrue(result); assertCustomerCountIs(0); assertFalse(dao.getById(existingCustomer.getId()).isPresent()); } @Test public void updationShouldBeSuccessAndAccessingTheSameCustomerShouldReturnUpdatedInformation() throws Exception { final String newFirstname = "Bernard"; final String newLastname = "Montgomery"; final Customer customer = new Customer(existingCustomer.getId(), newFirstname, newLastname); boolean result = dao.update(customer); assertTrue(result); final Customer cust = dao.getById(existingCustomer.getId()).get(); assertEquals(newFirstname, cust.getFirstName()); assertEquals(newLastname, cust.getLastName()); } } } /** * Represents a scenario where DB connectivity is not present due to network issue, or * DB service unavailable. * */ @Nested public class ConnectivityIssue { private static final String EXCEPTION_CAUSE = "Connection not available"; //@Rule public ExpectedException exception = ExpectedException.none(); /** * setup a connection failure scenario. * @throws SQLException if any error occurs. */ @BeforeEach public void setUp() throws SQLException { dao = new DbCustomerDao(mockedDatasource()); //exception.expect(Exception.class); //exception.expectMessage(EXCEPTION_CAUSE); } private DataSource mockedDatasource() throws SQLException { DataSource mockedDataSource = mock(DataSource.class); Connection mockedConnection = mock(Connection.class); SQLException exception = new SQLException(EXCEPTION_CAUSE); doThrow(exception).when(mockedConnection).prepareStatement(Mockito.anyString()); doReturn(mockedConnection).when(mockedDataSource).getConnection(); return mockedDataSource; } @Test public void addingACustomerFailsWithExceptionAsFeedbackToClient() { assertThrows(Exception.class, () -> { dao.add(new Customer(2, "Bernard", "Montgomery")); }); } @Test public void deletingACustomerFailsWithExceptionAsFeedbackToTheClient() { assertThrows(Exception.class, () -> { dao.delete(existingCustomer); }); } @Test public void updatingACustomerFailsWithFeedbackToTheClient() { final String newFirstname = "Bernard"; final String newLastname = "Montgomery"; assertThrows(Exception.class, () -> { dao.update(new Customer(existingCustomer.getId(), newFirstname, newLastname)); }); } @Test public void retrievingACustomerByIdFailsWithExceptionAsFeedbackToClient() { assertThrows(Exception.class, () -> { dao.getById(existingCustomer.getId()); }); } @Test public void retrievingAllCustomersFailsWithExceptionAsFeedbackToClient() { assertThrows(Exception.class, () -> { dao.getAll(); }); } } /** * Delete customer schema for fresh setup per test. * @throws SQLException if any error occurs. */ @AfterEach public void deleteSchema() throws SQLException { try (Connection connection = DriverManager.getConnection(DB_URL); Statement statement = connection.createStatement()) { statement.execute(CustomerSchemaSql.DELETE_SCHEMA_SQL); } } private void assertCustomerCountIs(int count) throws Exception { try (Stream allCustomers = dao.getAll()) { assertTrue(allCustomers.count() == count); } } /** * An arbitrary number which does not correspond to an active Customer id. * * @return an int of a customer id which doesn't exist */ private int getNonExistingCustomerId() { return 999; } } java-design-patterns-1.18.0/dao/src/test/java/com/iluwatar/dao/InMemoryCustomerDaoTest.java000066400000000000000000000125101322244523500316430ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dao; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Nested; import org.junit.jupiter.api.Test; import java.util.Optional; import java.util.stream.Stream; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertTrue; import static org.junit.jupiter.api.Assumptions.assumeTrue; /** * Tests {@link InMemoryCustomerDao}. */ public class InMemoryCustomerDaoTest { private InMemoryCustomerDao dao; private static final Customer CUSTOMER = new Customer(1, "Freddy", "Krueger"); @BeforeEach public void setUp() { dao = new InMemoryCustomerDao(); assertTrue(dao.add(CUSTOMER)); } /** * Represents the scenario when the DAO operations are being performed on a non existent * customer. */ @Nested public class NonExistingCustomer { @Test public void addingShouldResultInSuccess() throws Exception { try (Stream allCustomers = dao.getAll()) { assumeTrue(allCustomers.count() == 1); } final Customer nonExistingCustomer = new Customer(2, "Robert", "Englund"); boolean result = dao.add(nonExistingCustomer); assertTrue(result); assertCustomerCountIs(2); assertEquals(nonExistingCustomer, dao.getById(nonExistingCustomer.getId()).get()); } @Test public void deletionShouldBeFailureAndNotAffectExistingCustomers() throws Exception { final Customer nonExistingCustomer = new Customer(2, "Robert", "Englund"); boolean result = dao.delete(nonExistingCustomer); assertFalse(result); assertCustomerCountIs(1); } @Test public void updationShouldBeFailureAndNotAffectExistingCustomers() throws Exception { final int nonExistingId = getNonExistingCustomerId(); final String newFirstname = "Douglas"; final String newLastname = "MacArthur"; final Customer customer = new Customer(nonExistingId, newFirstname, newLastname); boolean result = dao.update(customer); assertFalse(result); assertFalse(dao.getById(nonExistingId).isPresent()); } @Test public void retrieveShouldReturnNoCustomer() throws Exception { assertFalse(dao.getById(getNonExistingCustomerId()).isPresent()); } } /** * Represents the scenario when the DAO operations are being performed on an already existing * customer. */ @Nested public class ExistingCustomer { @Test public void addingShouldResultInFailureAndNotAffectExistingCustomers() throws Exception { boolean result = dao.add(CUSTOMER); assertFalse(result); assertCustomerCountIs(1); assertEquals(CUSTOMER, dao.getById(CUSTOMER.getId()).get()); } @Test public void deletionShouldBeSuccessAndCustomerShouldBeNonAccessible() throws Exception { boolean result = dao.delete(CUSTOMER); assertTrue(result); assertCustomerCountIs(0); assertFalse(dao.getById(CUSTOMER.getId()).isPresent()); } @Test public void updationShouldBeSuccessAndAccessingTheSameCustomerShouldReturnUpdatedInformation() throws Exception { final String newFirstname = "Bernard"; final String newLastname = "Montgomery"; final Customer customer = new Customer(CUSTOMER.getId(), newFirstname, newLastname); boolean result = dao.update(customer); assertTrue(result); final Customer cust = dao.getById(CUSTOMER.getId()).get(); assertEquals(newFirstname, cust.getFirstName()); assertEquals(newLastname, cust.getLastName()); } @Test public void retriveShouldReturnTheCustomer() { Optional optionalCustomer = dao.getById(CUSTOMER.getId()); assertTrue(optionalCustomer.isPresent()); assertEquals(CUSTOMER, optionalCustomer.get()); } } /** * An arbitrary number which does not correspond to an active Customer id. * * @return an int of a customer id which doesn't exist */ private int getNonExistingCustomerId() { return 999; } private void assertCustomerCountIs(int count) throws Exception { try (Stream allCustomers = dao.getAll()) { assertTrue(allCustomers.count() == count); } } } java-design-patterns-1.18.0/data-bus/000077500000000000000000000000001322244523500173315ustar00rootroot00000000000000java-design-patterns-1.18.0/data-bus/.gitignore000066400000000000000000000000101322244523500213100ustar00rootroot00000000000000/target java-design-patterns-1.18.0/data-bus/README.md000066400000000000000000000017161322244523500206150ustar00rootroot00000000000000--- layout: pattern title: Data Bus folder: data-bus permalink: /patterns/data-bus/ categories: Architectural tags: - Java - Difficulty-Intermediate --- ## Intent Allows send of messages/events between components of an application without them needing to know about each other. They only need to know about the type of the message/event being sent. ![data bus pattern uml diagram](./etc/data-bus.urm.png "Data Bus pattern") ## Applicability Use Data Bus pattern when * you want your components to decide themselves which messages/events they want to receive * you want to have many-to-many communication * you want your components to know nothing about each other ## Related Patterns Data Bus is similar to * Mediator pattern with Data Bus Members deciding for themselves if they want to accept any given message * Observer pattern but supporting many-to-many communication * Publish/Subscribe pattern with the Data Bus decoupling the publisher and the subscriber java-design-patterns-1.18.0/data-bus/etc/000077500000000000000000000000001322244523500201045ustar00rootroot00000000000000java-design-patterns-1.18.0/data-bus/etc/data-bus.urm.png000066400000000000000000001673011322244523500231240ustar00rootroot00000000000000PNG  IHDR_qp)tEXtcopyleftGenerated by http://plantuml.com09zTXtplantumlxUN@}d JB ȪPM58j:߲$)U̜ؖ;ggcɄLE\' ,OE9=gI  Y,9rHKy |J`WmFqQXh*ڪXBW))~t. xEJY:nZz"ݯߌZRV<דٹ`#)^,P~c0CqT_ْKN5=i݅(Q'eK7wU(Nf#AFI{HvLq9͎oj5,@5r9FR_-n]YAs兒֛j \ c;ҵM瓰uO3;̧NKjX@LRymw/uOɏGmIj׺S8 kĭnsQPb*5ڦI)N;[+8Cu)Y\;f)gT(fj~Ci e:Rhbket M3-wƢZ]#g7v3.#X2aÞs={o.Sw{_܎ AzN[DH")Ю؂DGΆs!X'y\ =~@YA`5,HPǓD%5M;9YKRsʵns½^wi8s9vD].B].B ].B .B @B (D$$$4gΜ! yh"͸qF@@^ ]???@5jx`͚5 F@@^ ]KW@AQBq”{`Ȑ!℁NBlX*Oif.ɵGTPdٳGV[ZѺNq ]@Zb4s+ݽG.]ZYphԌ `B%BЯ_?Y$ `ƍv:uw/BRJaQ\S*U>3Õx{{46G*|'4h 2쉬\6!^5kﷄ^z+Wѱrʃ _ X zԗ(Qbʕܽ ]K PPKcƌe@Bٳg+e@B .C:99p2 t @z''M.AAA-[e@B쁔IWWuEEE%&&-s8p ??iV֨=:(((HHH@ "q. 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A.]?-|IENDB`java-design-patterns-1.18.0/data-bus/pom.xml000066400000000000000000000043731322244523500206550ustar00rootroot00000000000000 4.0.0 1.16.14 com.iluwatar java-design-patterns 1.18.0 data-bus org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.mockito mockito-core test java-design-patterns-1.18.0/data-bus/src/000077500000000000000000000000001322244523500201205ustar00rootroot00000000000000java-design-patterns-1.18.0/data-bus/src/main/000077500000000000000000000000001322244523500210445ustar00rootroot00000000000000java-design-patterns-1.18.0/data-bus/src/main/java/000077500000000000000000000000001322244523500217655ustar00rootroot00000000000000java-design-patterns-1.18.0/data-bus/src/main/java/com/000077500000000000000000000000001322244523500225435ustar00rootroot00000000000000java-design-patterns-1.18.0/data-bus/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500243735ustar00rootroot00000000000000java-design-patterns-1.18.0/data-bus/src/main/java/com/iluwatar/databus/000077500000000000000000000000001322244523500260165ustar00rootroot00000000000000java-design-patterns-1.18.0/data-bus/src/main/java/com/iluwatar/databus/AbstractDataType.java000066400000000000000000000050511322244523500320610ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ /* The MIT License (MIT) Copyright (c) 2016 Paul Campbell Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.databus; /** * Base for data to send via the Data-Bus. * * @author Paul Campbell (pcampbell@kemitix.net) */ public class AbstractDataType implements DataType { private DataBus dataBus; @Override public DataBus getDataBus() { return dataBus; } @Override public void setDataBus(DataBus dataBus) { this.dataBus = dataBus; } } java-design-patterns-1.18.0/data-bus/src/main/java/com/iluwatar/databus/App.java000066400000000000000000000074301322244523500274050ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.databus; import com.iluwatar.databus.data.MessageData; import com.iluwatar.databus.data.StartingData; import com.iluwatar.databus.data.StoppingData; import com.iluwatar.databus.members.MessageCollectorMember; import com.iluwatar.databus.members.StatusMember; import java.time.LocalDateTime; /** * The Data Bus pattern *

*

{@see http://wiki.c2.com/?DataBusPattern}

*

*

The Data-Bus pattern provides a method where different parts of an application may * pass messages between each other without needing to be aware of the other's existence.

*

Similar to the {@code ObserverPattern}, members register themselves with the {@link DataBus} * and may then receive each piece of data that is published to the Data-Bus. The member * may react to any given message or not.

*

It allows for Many-to-Many distribution of data, as there may be any number of * publishers to a Data-Bus, and any number of members receiving the data. All members * will receive the same data, the order each receives a given piece of data, is an * implementation detail.

*

Members may unsubscribe from the Data-Bus to stop receiving data.

*

This example of the pattern implements a Synchronous Data-Bus, meaning that * when data is published to the Data-Bus, the publish method will not return until * all members have received the data and returned.

*

The {@link DataBus} class is a Singleton.

*

Members of the Data-Bus must implement the {@link Member} interface.

*

Data to be published via the Data-Bus must implement the {@link DataType} interface.

*

The {@code data} package contains example {@link DataType} implementations.

*

The {@code members} package contains example {@link Member} implementations.

*

The {@link StatusMember} demonstrates using the DataBus to publish a message * to the Data-Bus when it receives a message.

* * @author Paul Campbell (pcampbell@kemitix.net) */ class App { public static void main(String[] args) { final DataBus bus = DataBus.getInstance(); bus.subscribe(new StatusMember(1)); bus.subscribe(new StatusMember(2)); final MessageCollectorMember foo = new MessageCollectorMember("Foo"); final MessageCollectorMember bar = new MessageCollectorMember("Bar"); bus.subscribe(foo); bus.publish(StartingData.of(LocalDateTime.now())); bus.publish(MessageData.of("Only Foo should see this")); bus.subscribe(bar); bus.publish(MessageData.of("Foo and Bar should see this")); bus.unsubscribe(foo); bus.publish(MessageData.of("Only Bar should see this")); bus.publish(StoppingData.of(LocalDateTime.now())); } } java-design-patterns-1.18.0/data-bus/src/main/java/com/iluwatar/databus/DataBus.java000066400000000000000000000042561322244523500302130ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.databus; import java.util.HashSet; import java.util.Set; /** * The Data-Bus implementation. * *

This implementation uses a Singleton.

* * @author Paul Campbell (pcampbell@kemitix.net) */ public class DataBus { private static final DataBus INSTANCE = new DataBus(); private final Set listeners = new HashSet<>(); public static DataBus getInstance() { return INSTANCE; } /** * Register a member with the data-bus to start receiving events. * * @param member The member to register */ public void subscribe(final Member member) { this.listeners.add(member); } /** * Deregister a member to stop receiving events. * * @param member The member to deregister */ public void unsubscribe(final Member member) { this.listeners.remove(member); } /** * Publish and event to all members. * * @param event The event */ public void publish(final DataType event) { event.setDataBus(this); listeners.forEach(listener -> listener.accept(event)); } } java-design-patterns-1.18.0/data-bus/src/main/java/com/iluwatar/databus/DataType.java000066400000000000000000000051241322244523500303760ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ /* The MIT License (MIT) Copyright (c) 2016 Paul Campbell Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.databus; /** * Events are sent via the Data-Bus. * * @author Paul Campbell (pcampbell@kemitix.net) */ public interface DataType { /** * Returns the data-bus the event is being sent on. * * @return The data-bus */ DataBus getDataBus(); /** * Set the data-bus the event will be sent on. * * @param dataBus The data-bus */ void setDataBus(DataBus dataBus); } java-design-patterns-1.18.0/data-bus/src/main/java/com/iluwatar/databus/Member.java000066400000000000000000000046671322244523500301050ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ /* The MIT License (MIT) Copyright (c) 2016 Paul Campbell Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.databus; import java.util.function.Consumer; /** * Members receive events from the Data-Bus. * * @author Paul Campbell (pcampbell@kemitix.net) */ public interface Member extends Consumer { void accept(DataType event); } java-design-patterns-1.18.0/data-bus/src/main/java/com/iluwatar/databus/data/000077500000000000000000000000001322244523500267275ustar00rootroot00000000000000java-design-patterns-1.18.0/data-bus/src/main/java/com/iluwatar/databus/data/MessageData.java000066400000000000000000000032421322244523500317510ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.databus.data; import com.iluwatar.databus.AbstractDataType; import com.iluwatar.databus.DataType; /** * An event raised when a string message is sent. * * @author Paul Campbell (pcampbell@kemitix.net) */ public class MessageData extends AbstractDataType { private final String message; public MessageData(String message) { this.message = message; } public String getMessage() { return message; } public static DataType of(final String message) { return new MessageData(message); } } java-design-patterns-1.18.0/data-bus/src/main/java/com/iluwatar/databus/data/StartingData.java000066400000000000000000000033631322244523500321640ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.databus.data; import com.iluwatar.databus.AbstractDataType; import com.iluwatar.databus.DataType; import java.time.LocalDateTime; /** * An event raised when applications starts, containing the start time of the application. * * @author Paul Campbell (pcampbell@kemitix.net) */ public class StartingData extends AbstractDataType { private final LocalDateTime when; public StartingData(LocalDateTime when) { this.when = when; } public LocalDateTime getWhen() { return when; } public static DataType of(final LocalDateTime when) { return new StartingData(when); } } java-design-patterns-1.18.0/data-bus/src/main/java/com/iluwatar/databus/data/StoppingData.java000066400000000000000000000033611322244523500321720ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.databus.data; import com.iluwatar.databus.AbstractDataType; import com.iluwatar.databus.DataType; import java.time.LocalDateTime; /** * An event raised when applications stops, containing the stop time of the application. * * @author Paul Campbell (pcampbell@kemitix.net) */ public class StoppingData extends AbstractDataType { private final LocalDateTime when; public StoppingData(LocalDateTime when) { this.when = when; } public LocalDateTime getWhen() { return when; } public static DataType of(final LocalDateTime when) { return new StoppingData(when); } } java-design-patterns-1.18.0/data-bus/src/main/java/com/iluwatar/databus/members/000077500000000000000000000000001322244523500274505ustar00rootroot00000000000000MessageCollectorMember.java000066400000000000000000000043771322244523500346320ustar00rootroot00000000000000java-design-patterns-1.18.0/data-bus/src/main/java/com/iluwatar/databus/members/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.databus.members; import com.iluwatar.databus.DataType; import com.iluwatar.databus.Member; import com.iluwatar.databus.data.MessageData; import java.util.ArrayList; import java.util.Collections; import java.util.List; import java.util.logging.Logger; /** * Receiver of Data-Bus events that collects the messages from each {@link MessageData}. * * @author Paul Campbell (pcampbell@kemitix.net) */ public class MessageCollectorMember implements Member { private static final Logger LOGGER = Logger.getLogger(MessageCollectorMember.class.getName()); private final String name; private List messages = new ArrayList<>(); public MessageCollectorMember(String name) { this.name = name; } @Override public void accept(final DataType data) { if (data instanceof MessageData) { handleEvent((MessageData) data); } } private void handleEvent(MessageData data) { LOGGER.info(String.format("%s sees message %s", name, data.getMessage())); messages.add(data.getMessage()); } public List getMessages() { return Collections.unmodifiableList(messages); } } java-design-patterns-1.18.0/data-bus/src/main/java/com/iluwatar/databus/members/StatusMember.java000066400000000000000000000052641322244523500327350ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.databus.members; import com.iluwatar.databus.DataType; import com.iluwatar.databus.Member; import com.iluwatar.databus.data.MessageData; import com.iluwatar.databus.data.StartingData; import com.iluwatar.databus.data.StoppingData; import java.time.LocalDateTime; import java.util.logging.Logger; /** * Receiver of Data-Bus events. * * @author Paul Campbell (pcampbell@kemitix.net) */ public class StatusMember implements Member { private static final Logger LOGGER = Logger.getLogger(StatusMember.class.getName()); private final int id; private LocalDateTime started; private LocalDateTime stopped; public StatusMember(int id) { this.id = id; } @Override public void accept(final DataType data) { if (data instanceof StartingData) { handleEvent((StartingData) data); } else if (data instanceof StoppingData) { handleEvent((StoppingData) data); } } private void handleEvent(StartingData data) { started = data.getWhen(); LOGGER.info(String.format("Receiver #%d sees application started at %s", id, started)); } private void handleEvent(StoppingData data) { stopped = data.getWhen(); LOGGER.info(String.format("Receiver #%d sees application stopping at %s", id, stopped)); LOGGER.info(String.format("Receiver #%d sending goodbye message", id)); data.getDataBus().publish(MessageData.of(String.format("Goodbye cruel world from #%d!", id))); } public LocalDateTime getStarted() { return started; } public LocalDateTime getStopped() { return stopped; } } java-design-patterns-1.18.0/data-bus/src/test/000077500000000000000000000000001322244523500210775ustar00rootroot00000000000000java-design-patterns-1.18.0/data-bus/src/test/java/000077500000000000000000000000001322244523500220205ustar00rootroot00000000000000java-design-patterns-1.18.0/data-bus/src/test/java/com/000077500000000000000000000000001322244523500225765ustar00rootroot00000000000000java-design-patterns-1.18.0/data-bus/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500244265ustar00rootroot00000000000000java-design-patterns-1.18.0/data-bus/src/test/java/com/iluwatar/databus/000077500000000000000000000000001322244523500260515ustar00rootroot00000000000000java-design-patterns-1.18.0/data-bus/src/test/java/com/iluwatar/databus/DataBusTest.java000066400000000000000000000042761322244523500311100ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.databus; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.mockito.Mock; import org.mockito.MockitoAnnotations; import static org.mockito.BDDMockito.then; import static org.mockito.Mockito.never; /** * Tests for {@link DataBus}. * * @author Paul Campbell (pcampbell@kemitix.net) */ public class DataBusTest { @Mock private Member member; @Mock private DataType event; @BeforeEach public void setUp() { MockitoAnnotations.initMocks(this); } @Test public void publishedEventIsReceivedBySubscribedMember() { //given final DataBus dataBus = DataBus.getInstance(); dataBus.subscribe(member); //when dataBus.publish(event); //then then(member).should().accept(event); } @Test public void publishedEventIsNotReceivedByMemberAfterUnsubscribing() { //given final DataBus dataBus = DataBus.getInstance(); dataBus.subscribe(member); dataBus.unsubscribe(member); //when dataBus.publish(event); //then then(member).should(never()).accept(event); } } java-design-patterns-1.18.0/data-bus/src/test/java/com/iluwatar/databus/members/000077500000000000000000000000001322244523500275035ustar00rootroot00000000000000MessageCollectorMemberTest.java000066400000000000000000000044501322244523500355150ustar00rootroot00000000000000java-design-patterns-1.18.0/data-bus/src/test/java/com/iluwatar/databus/members/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.databus.members; import com.iluwatar.databus.data.MessageData; import com.iluwatar.databus.data.StartingData; import org.junit.jupiter.api.Test; import java.time.LocalDateTime; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Tests for {@link MessageCollectorMember}. * * @author Paul Campbell (pcampbell@kemitix.net) */ public class MessageCollectorMemberTest { @Test public void collectMessageFromMessageData() { //given final String message = "message"; final MessageData messageData = new MessageData(message); final MessageCollectorMember collector = new MessageCollectorMember("collector"); //when collector.accept(messageData); //then assertTrue(collector.getMessages().contains(message)); } @Test public void collectIgnoresMessageFromOtherDataTypes() { //given final StartingData startingData = new StartingData(LocalDateTime.now()); final MessageCollectorMember collector = new MessageCollectorMember("collector"); //when collector.accept(startingData); //then assertEquals(0, collector.getMessages().size()); } } StatusMemberTest.java000066400000000000000000000054601322244523500335470ustar00rootroot00000000000000java-design-patterns-1.18.0/data-bus/src/test/java/com/iluwatar/databus/members/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.databus.members; import com.iluwatar.databus.DataBus; import com.iluwatar.databus.data.MessageData; import com.iluwatar.databus.data.StartingData; import com.iluwatar.databus.data.StoppingData; import org.junit.jupiter.api.Test; import java.time.LocalDateTime; import java.time.Month; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNull; /** * Tests for {@link StatusMember}. * * @author Paul Campbell (pcampbell@kemitix.net) */ public class StatusMemberTest { @Test public void statusRecordsTheStartTime() { //given final LocalDateTime startTime = LocalDateTime.of(2017, Month.APRIL, 1, 19, 9); final StartingData startingData = new StartingData(startTime); final StatusMember statusMember = new StatusMember(1); //when statusMember.accept(startingData); //then assertEquals(startTime, statusMember.getStarted()); } @Test public void statusRecordsTheStopTime() { //given final LocalDateTime stop = LocalDateTime.of(2017, Month.APRIL, 1, 19, 12); final StoppingData stoppingData = new StoppingData(stop); stoppingData.setDataBus(DataBus.getInstance()); final StatusMember statusMember = new StatusMember(1); //when statusMember.accept(stoppingData); //then assertEquals(stop, statusMember.getStopped()); } @Test public void statusIgnoresMessageData() { //given final MessageData messageData = new MessageData("message"); final StatusMember statusMember = new StatusMember(1); //when statusMember.accept(messageData); //then assertNull(statusMember.getStarted()); assertNull(statusMember.getStopped()); } } java-design-patterns-1.18.0/data-mapper/000077500000000000000000000000001322244523500200245ustar00rootroot00000000000000java-design-patterns-1.18.0/data-mapper/README.md000066400000000000000000000013111322244523500212770ustar00rootroot00000000000000--- layout: pattern title: Data Mapper folder: data-mapper permalink: /patterns/data-mapper/ categories: Persistence Tier tags: - Java - Difficulty-Beginner --- ## Intent A layer of mappers that moves data between objects and a database while keeping them independent of each other and the mapper itself ![alt text](./etc/data-mapper.png "Data Mapper") ## Applicability Use the Data Mapper in any of the following situations * when you want to decouple data objects from DB access layer * when you want to write multiple data retrieval/persistence implementations ## Credits * [Data Mapper](http://richard.jp.leguen.ca/tutoring/soen343-f2010/tutorials/implementing-data-mapper/) java-design-patterns-1.18.0/data-mapper/etc/000077500000000000000000000000001322244523500205775ustar00rootroot00000000000000java-design-patterns-1.18.0/data-mapper/etc/data-mapper.png000066400000000000000000001163361322244523500235120ustar00rootroot00000000000000PNG  IHDR~sRGBgAMA a pHYs+sIDATx^xa{`SRR- 1K[ʔoUQ2S> V@6f^$,]7۫[y^"n81]ݲ/@FNj;D )(Ԏ$X# 9gfvgb<#Ξ]b79u ,@ 51` @ kb X@ 51` @ kb X@ 51` @ kb X@ 51` @ kb X@ 51` @ kb X@ 51` @ kb X@ 51` @ kb X@ 51` @ kb X@ 51` @ kb X@ 51` @ kb X@ 51` @ kb X@ 51` @ kb X@ 51` @ kb X@ 51` @ kb X@ 51` @ kb X@ 51` @ kb XP`uΟV"X@zaX~uuLB@u#X@!XcZPKV@ 5`u>4?\vny 6=LvMEiيNjTJ/P_E+}^hʹtS kšܨ3'u]2eMn ?.~Q먺r5ѯ~%s<Iyq ubeBHT9&>?/j_&DFB5Qz{\-=9>hu4:y[#׏4,[^56*=8lw^^U9j. 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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.datamapper; import java.util.Optional; import org.apache.log4j.Logger; /** * The Data Mapper (DM) is a layer of software that separates the in-memory objects from the * database. Its responsibility is to transfer data between the two and also to isolate them from * each other. With Data Mapper the in-memory objects needn't know even that there's a database * present; they need no SQL interface code, and certainly no knowledge of the database schema. (The * database schema is always ignorant of the objects that use it.) Since it's a form of Mapper , * Data Mapper itself is even unknown to the domain layer. *

* The below example demonstrates basic CRUD operations: Create, Read, Update, and Delete. * */ public final class App { private static Logger log = Logger.getLogger(App.class); /** * Program entry point. * * @param args command line args. */ public static void main(final String... args) { /* Create new data mapper for type 'first' */ final StudentDataMapper mapper = new StudentDataMapperImpl(); /* Create new student */ Student student = new Student(1, "Adam", 'A'); /* Add student in respectibe store */ mapper.insert(student); log.debug("App.main(), student : " + student + ", is inserted"); /* Find this student */ final Optional studentToBeFound = mapper.find(student.getStudentId()); log.debug("App.main(), student : " + studentToBeFound + ", is searched"); /* Update existing student object */ student = new Student(student.getStudentId(), "AdamUpdated", 'A'); /* Update student in respectibe db */ mapper.update(student); log.debug("App.main(), student : " + student + ", is updated"); log.debug("App.main(), student : " + student + ", is going to be deleted"); /* Delete student in db */ mapper.delete(student); } private App() {} } DataMapperException.java000066400000000000000000000034531322244523500336720ustar00rootroot00000000000000java-design-patterns-1.18.0/data-mapper/src/main/java/com/iluwatar/datamapper/** * The MIT License Copyright (c) 2016 Amit Dixit * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and * associated documentation files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, publish, distribute, * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.datamapper; /** * Using Runtime Exception for avoiding dependancy on implementation exceptions. This helps in * decoupling. * * @author amit.dixit * */ public final class DataMapperException extends RuntimeException { private static final long serialVersionUID = 1L; /** * Constructs a new runtime exception with the specified detail message. The cause is not * initialized, and may subsequently be initialized by a call to {@link #initCause}. * * @param message the detail message. The detail message is saved for later retrieval by the * {@link #getMessage()} method. */ public DataMapperException(final String message) { super(message); } } java-design-patterns-1.18.0/data-mapper/src/main/java/com/iluwatar/datamapper/Student.java000066400000000000000000000065171322244523500315060ustar00rootroot00000000000000/** * The MIT License Copyright (c) 2016 Amit Dixit * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and * associated documentation files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, publish, distribute, * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.datamapper; import java.io.Serializable; /** * Class defining Student */ public final class Student implements Serializable { private static final long serialVersionUID = 1L; private int studentId; private String name; private char grade; /** * Use this constructor to create a Student with all details * * @param studentId as unique student id * @param name as student name * @param grade as respective grade of student */ public Student(final int studentId, final String name, final char grade) { super(); this.studentId = studentId; this.name = name; this.grade = grade; } /** * * @return the student id */ public int getStudentId() { return studentId; } /** * * @param studentId as unique student id */ public void setStudentId(final int studentId) { this.studentId = studentId; } /** * * @return name of student */ public String getName() { return name; } /** * * @param name as 'name' of student */ public void setName(final String name) { this.name = name; } /** * * @return grade of student */ public char getGrade() { return grade; } /** * * @param grade as 'grade of student' */ public void setGrade(final char grade) { this.grade = grade; } /** * */ @Override public boolean equals(final Object inputObject) { boolean isEqual = false; /* Check if both objects are same */ if (this == inputObject) { isEqual = true; } else if (inputObject != null && getClass() == inputObject.getClass()) { final Student inputStudent = (Student) inputObject; /* If student id matched */ if (this.getStudentId() == inputStudent.getStudentId()) { isEqual = true; } } return isEqual; } /** * */ @Override public int hashCode() { /* Student id is assumed to be unique */ return this.getStudentId(); } /** * */ @Override public String toString() { return "Student [studentId=" + studentId + ", name=" + name + ", grade=" + grade + "]"; } } java-design-patterns-1.18.0/data-mapper/src/main/java/com/iluwatar/datamapper/StudentDataMapper.java000066400000000000000000000030401322244523500334310ustar00rootroot00000000000000/** * The MIT License Copyright (c) 2016 Amit Dixit * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and * associated documentation files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, publish, distribute, * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.datamapper; import java.util.Optional; /** * Interface lists out the possible behaviour for all possible student mappers */ public interface StudentDataMapper { Optional find(int studentId); void insert(Student student) throws DataMapperException; void update(Student student) throws DataMapperException; void delete(Student student) throws DataMapperException; } StudentDataMapperImpl.java000066400000000000000000000066151322244523500342070ustar00rootroot00000000000000java-design-patterns-1.18.0/data-mapper/src/main/java/com/iluwatar/datamapper/** * The MIT License Copyright (c) 2016 Amit Dixit * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and * associated documentation files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, publish, distribute, * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.datamapper; import java.util.ArrayList; import java.util.List; import java.util.Optional; /** * Implementation of Actions on Students Data */ public final class StudentDataMapperImpl implements StudentDataMapper { /* Note: Normally this would be in the form of an actual database */ private List students = new ArrayList<>(); @Override public Optional find(int studentId) { /* Compare with existing students */ for (final Student student : this.getStudents()) { /* Check if student is found */ if (student.getStudentId() == studentId) { return Optional.of(student); } } /* Return empty value */ return Optional.empty(); } @Override public void update(Student studentToBeUpdated) throws DataMapperException { /* Check with existing students */ if (this.getStudents().contains(studentToBeUpdated)) { /* Get the index of student in list */ final int index = this.getStudents().indexOf(studentToBeUpdated); /* Update the student in list */ this.getStudents().set(index, studentToBeUpdated); } else { /* Throw user error after wrapping in a runtime exception */ throw new DataMapperException("Student [" + studentToBeUpdated.getName() + "] is not found"); } } @Override public void insert(Student studentToBeInserted) throws DataMapperException { /* Check with existing students */ if (!this.getStudents().contains(studentToBeInserted)) { /* Add student in list */ this.getStudents().add(studentToBeInserted); } else { /* Throw user error after wrapping in a runtime exception */ throw new DataMapperException("Student already [" + studentToBeInserted.getName() + "] exists"); } } @Override public void delete(Student studentToBeDeleted) throws DataMapperException { /* Check with existing students */ if (this.getStudents().contains(studentToBeDeleted)) { /* Delete the student from list */ this.getStudents().remove(studentToBeDeleted); } else { /* Throw user error after wrapping in a runtime exception */ throw new DataMapperException("Student [" + studentToBeDeleted.getName() + "] is not found"); } } public List getStudents() { return this.students; } } java-design-patterns-1.18.0/data-mapper/src/main/resources/000077500000000000000000000000001322244523500235515ustar00rootroot00000000000000java-design-patterns-1.18.0/data-mapper/src/main/resources/log4j.xml000066400000000000000000000032221322244523500253110ustar00rootroot00000000000000 java-design-patterns-1.18.0/data-mapper/src/test/000077500000000000000000000000001322244523500215725ustar00rootroot00000000000000java-design-patterns-1.18.0/data-mapper/src/test/java/000077500000000000000000000000001322244523500225135ustar00rootroot00000000000000java-design-patterns-1.18.0/data-mapper/src/test/java/com/000077500000000000000000000000001322244523500232715ustar00rootroot00000000000000java-design-patterns-1.18.0/data-mapper/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500251215ustar00rootroot00000000000000java-design-patterns-1.18.0/data-mapper/src/test/java/com/iluwatar/datamapper/000077500000000000000000000000001322244523500272375ustar00rootroot00000000000000java-design-patterns-1.18.0/data-mapper/src/test/java/com/iluwatar/datamapper/AppTest.java000066400000000000000000000025761322244523500314740ustar00rootroot00000000000000/** * The MIT License Copyright (c) 2016 Amit Dixit * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and * associated documentation files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, publish, distribute, * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.datamapper; import org.junit.jupiter.api.Test; /** * Tests that Data-Mapper example runs without errors. */ public final class AppTest { @Test public void test() { final String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/data-mapper/src/test/java/com/iluwatar/datamapper/DataMapperTest.java000066400000000000000000000055151322244523500327660ustar00rootroot00000000000000/** * The MIT License Copyright (c) 2016 Amit Dixit * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and * associated documentation files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, publish, distribute, * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.datamapper; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * The Data Mapper (DM) is a layer of software that separates the in-memory objects from the * database. Its responsibility is to transfer data between the two and also to isolate them from * each other. With Data Mapper the in-memory objects needn't know even that there's a database * present; they need no SQL interface code, and certainly no knowledge of the database schema. (The * database schema is always ignorant of the objects that use it.) Since it's a form of Mapper , * Data Mapper itself is even unknown to the domain layer. *

*/ public class DataMapperTest { /** * This test verify that first data mapper is able to perform all CRUD operations on Student */ @Test public void testFirstDataMapper() { /* Create new data mapper of first type */ final StudentDataMapper mapper = new StudentDataMapperImpl(); /* Create new student */ Student student = new Student(1, "Adam", 'A'); /* Add student in respectibe db */ mapper.insert(student); /* Check if student is added in db */ assertEquals(student.getStudentId(), mapper.find(student.getStudentId()).get().getStudentId()); /* Update existing student object */ student = new Student(student.getStudentId(), "AdamUpdated", 'A'); /* Update student in respectibe db */ mapper.update(student); /* Check if student is updated in db */ assertEquals(mapper.find(student.getStudentId()).get().getName(), "AdamUpdated"); /* Delete student in db */ mapper.delete(student); /* Result should be false */ assertEquals(false, mapper.find(student.getStudentId()).isPresent()); } } java-design-patterns-1.18.0/data-mapper/src/test/java/com/iluwatar/datamapper/StudentTest.java000066400000000000000000000043431322244523500323740ustar00rootroot00000000000000/** * The MIT License Copyright (c) 2016 Amit Dixit * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and * associated documentation files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, publish, distribute, * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.datamapper; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Tests {@link Student}. */ public final class StudentTest { @Test /** * This API tests the equality behaviour of Student object * Object Equality should work as per logic defined in equals method * * @throws Exception if any execution error during test */ public void testEquality() throws Exception { /* Create some students */ final Student firstStudent = new Student(1, "Adam", 'A'); final Student secondStudent = new Student(2, "Donald", 'B'); final Student secondSameStudent = new Student(2, "Donald", 'B'); final Student firstSameStudent = firstStudent; /* Check equals functionality: should return 'true' */ assertTrue(firstStudent.equals(firstSameStudent)); /* Check equals functionality: should return 'false' */ assertFalse(firstStudent.equals(secondStudent)); /* Check equals functionality: should return 'true' */ assertTrue(secondStudent.equals(secondSameStudent)); } } java-design-patterns-1.18.0/data-transfer-object/000077500000000000000000000000001322244523500216305ustar00rootroot00000000000000java-design-patterns-1.18.0/data-transfer-object/README.md000066400000000000000000000015321322244523500231100ustar00rootroot00000000000000--- layout: pattern title: Data Transfer Object folder: data-transfer-object permalink: /patterns/data-transfer-object/ categories: Architectural tags: - Java - KISS - YAGNI - Difficulty-Beginner --- ## Intent Pass data with multiple attributes in one shot from client to server, to avoid multiple calls to remote server. ![alt text](./etc/data-transfer-object.urm.png "data-transfer-object") ## Applicability Use the Data Transfer Object pattern when * The client is asking for multiple information. And the information is related. * When you want to boost the performance to get resources. * You want reduced number of remote calls. ## Credits * [Design Pattern - Transfer Object Pattern](https://www.tutorialspoint.com/design_pattern/transfer_object_pattern.htm) * [Data Transfer Object](https://msdn.microsoft.com/en-us/library/ff649585.aspx) java-design-patterns-1.18.0/data-transfer-object/etc/000077500000000000000000000000001322244523500224035ustar00rootroot00000000000000java-design-patterns-1.18.0/data-transfer-object/etc/data-transfer-object.ucls000066400000000000000000000062001322244523500272700ustar00rootroot00000000000000 java-design-patterns-1.18.0/data-transfer-object/etc/data-transfer-object.urm.png000066400000000000000000000452741322244523500277260ustar00rootroot00000000000000PNG  IHDRߜ35)tEXtcopyleftGenerated by http://plantuml.com09zTXtplantumlx}SmK@paShOm\+ƻ/d/,nv䬈&B 3sb+x3ROqJo\2bthragJ EQ}(R{fBJ e@֬ qȥrW)UH:rМy'%R1\AD q^Gw0`wi nBM:\j`{Li[A6{ډR7_1܈oӛ56^W8bBۓ׸G!4&xr7Q']]B*(s3]oRnDRo8ܗP}ys⫦Wz#9v$f0. nǟ/!Br^.!%<>ɔ(3Z.KBꖘ)J!f2gbEK96HhIDATx \uȲ,fģ.!kdd["O[w[ (^/ch$^0%[P=i35g:gfsy_9f9y9mopfl @@* * @@* * @@|Tʦ4o`}[3G ^(U8F{\۶m/]gJ/1*yUVV);))):t};V]]}96 UU쇽5*,, sed_Uofmm-g@%ï0,,L Ν;.^X ?~sS1Y˖-z7u)[@Zzj+3w%#|] e|iLү_?QF)oP  mꫯWf"j0&M.۷o/>|3URu;vL~cƌQ{nyo>w CyRKD_z%m=JդIdxҥ2,jKbO<:s=_ƍ39b>r>}>c}vu &.[bef>WXݕʀ-,B+6p}@i4o߾}}3{w/ ;CT>TСCexʿd@ʓ2,#-UV&*c>o2&R-ŖoAmz/bGM^/AIG;aB 8P;x`Jr@#u-J4hLi'((H/!!! 2,RWA95=3jsõDmurJ&MO+lP|_^ۥKRdR%$$$ÃJÒ"PPGS愔QYj趭sORRRBCCUIҞ pIMMU\~.{AB8K.U=z v?P=KZ3"}rpKR,VF"U箢l"ujȺmsj]KuVW'hY7Ltt{'UˢT)w֍3mR5jTppk׮6Te@@wܡ!JH,Q%٩+C+7VPwz ;ݻLÕ[LV^VWo J*G?Y3wFnhQZMMaaVWoWe 4:*paPSNe+QGSJMfFI ]Nƨnb_B|IW%'bR쑪{D"vXb>3iJ~PNԩhVڬH9QBHKU #U")[u,۩ܟ#Uw^S%BpWb߾UaaR3gX7U UDʷ%;#[#ۼ|s5jfe%8DO*b=o'KH7ül[J~="N~ T XaֻcECEcl:T|4rm.T!UK{zucTbTeFs@ Uĩ (n&?aqeE"vw#RT5W1qk/2ҩy/l:"1 UlvBvz3pN\ސHRWt{_v(G[w_wx@uTC(߮N-pg[v]IjOΛ'ndhhmJ >O*zCџ*}mӥ%܎O\'k"#HHBvuBmtmVLf(%KDzIwESvԔʀZAFSnSza REoHRġ|:Mv6klP=$dTfT/.Nenޜ--`}v yi2BrrW޺M@*5]~|r+WFi7n7Rdr/.r忲d;Л U%ʱTɾFt --GƍRVRwLu>ՙkڙrM]*3fLBVA }]l)jfEtN".[@P RE_B*u'-kwWH9d̳gʐ]P|uD#D&{oޜi}Nv9׭ۍJlK "/!U*.NwX"̙4iR񍲗Uwɟ4g…Cg1*h(3S+8?Q mʉ^p i-/Hu ![G]={h/T/*ZvmPPVVHo!gj鏨.?hGYnEjk븍 j.6e[_ ccho T uһwBu_*BB>?BRE]vBHz>U"" UH!B!H!B!H!~B?]F!HUH!}!ܧT[hB|ܧ}}!ܧ "p:!~ " Ut#ސ:/T!U^#c#gjUdo>D]ARR;;**" eddUfg*~~ͻv|vX2ko-6ϼWǃބȘNKLgd.tϨ IV3{b ϟ۹sѣetdݟ)993;ۻmԨv-A=MXY+^l4ח.oA-UӕL;vlbϞ1c$؇+AR1f iMo3L۷ʼP7oTEDS5 ?hg72N.CCK2\T@̙=}.SXNhQZXص~~m#cLhHٯre^ɰ:BeY.Re3mLMde'grh#ʚܽ{ e*K"+_FFw[Rֳݼ,Ũa;?9so*Hf(moŋל8Uڦi>f}WT5TIW!3ѭSg<327|Q:|7`}v e)CBZ҉̗ҋS> R֬yVvQ&6Ҩavj7BUӝ6])}:UwBF5Lc.WPB$1uT9\1c[odwec&t(UKW'u- b=CRh,uHCK엫mrK^eQC%&O"Ur_ =H f9u^5ï8X޷Styl[y(ɗWm:,WW^=to?mLE~FLWylzuYu- rJ; Cf 9sMr_USv;%U>r/iH#U7s|gl>F:3g2NTTDmmфm:,W}ڟ_ OnSw.JQv!993eў7C9 .}!!'n{{S^>v3VgeMXaܸ!S}ɤC&* ?gƲV fgg8aaj;D~BW9Lr\T*Qbʵs$WwBF6Lwm{.P{չBMnSw/T8_^AoB V޽{х[ݨHsmڍ\/Q;?-XYA0(ooWZZg?Ct UM뿂uYB gvR|ށ-zxÙa(JRenniv5A*}gv];ff>y¡˗8.!OC«t^^yq>FwCM*7-|̌Z4kZuXO6.jtӒI;7Iw[Zrֳ,mt*8eywp}I"]]M~:\8q>FRŇ UXP? 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.datatransfer; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.ArrayList; import java.util.List; /** * The Data Transfer Object pattern is a design pattern in which an data transfer object is used to serve related * information together to avoid multiple call for each piece of information. *

* In this example, ({@link CustomerClientApp}) as as customer details consumer i.e. client to request for * customer details to server. *

* CustomerResource ({@link CustomerResource}) act as server to serve customer information. * And The CustomerDto ({@link CustomerDto} is data transfer object to share customer information. */ public class CustomerClientApp { private static final Logger LOGGER = LoggerFactory.getLogger(CustomerClientApp.class); /** * Method as act client and request to server for details. * * @param args program argument. */ public static void main(String[] args) { List customers = new ArrayList<>(); CustomerDto customerOne = new CustomerDto("1", "Kelly", "Brown"); CustomerDto customerTwo = new CustomerDto("2", "Alfonso", "Bass"); customers.add(customerOne); customers.add(customerTwo); CustomerResource customerResource = new CustomerResource(customers); LOGGER.info("All customers:-"); List allCustomers = customerResource.getAllCustomers(); printCustomerDetails(allCustomers); LOGGER.info("----------------------------------------------------------"); LOGGER.info("Deleting customer with id {1}"); customerResource.delete(customerOne.getId()); allCustomers = customerResource.getAllCustomers(); printCustomerDetails(allCustomers); LOGGER.info("----------------------------------------------------------"); LOGGER.info("Adding customer three}"); CustomerDto customerThree = new CustomerDto("3", "Lynda", "Blair"); customerResource.save(customerThree); allCustomers = customerResource.getAllCustomers(); printCustomerDetails(allCustomers); } private static void printCustomerDetails(List allCustomers) { allCustomers.forEach(customer -> LOGGER.info(customer.getFirstName())); } } CustomerDto.java000066400000000000000000000036721322244523500344140ustar00rootroot00000000000000java-design-patterns-1.18.0/data-transfer-object/src/main/java/com/iluwatar/datatransfer/* * The MIT License (MIT) * * Copyright (c) 2017 Gopinath Langote * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.datatransfer; /** * {@link CustomerDto} is a data transfer object POJO. Instead of sending individual information to client * We can send related information together in POJO. *

* Dto will not have any business logic in it. */ public class CustomerDto { private final String id; private final String firstName; private final String lastName; /** * @param id customer id * @param firstName customer first name * @param lastName customer last name */ public CustomerDto(String id, String firstName, String lastName) { this.id = id; this.firstName = firstName; this.lastName = lastName; } public String getId() { return id; } public String getFirstName() { return firstName; } public String getLastName() { return lastName; } } CustomerResource.java000066400000000000000000000040251322244523500354460ustar00rootroot00000000000000java-design-patterns-1.18.0/data-transfer-object/src/main/java/com/iluwatar/datatransfer/* * The MIT License (MIT) * * Copyright (c) 2017 Gopinath Langote * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.datatransfer; import java.util.List; /** * The resource class which serves customer information. * This class act as server in the demo. Which has all customer details. */ public class CustomerResource { private List customers; /** * @param customers initialize resource with existing customers. Act as database. */ public CustomerResource(List customers) { this.customers = customers; } /** * @return : all customers in list. */ public List getAllCustomers() { return customers; } /** * @param customer save new customer to list. */ public void save(CustomerDto customer) { customers.add(customer); } /** * @param customerId delete customer with id {@code customerId} */ public void delete(String customerId) { customers.removeIf(customer -> customer.getId().equals(customerId)); } }java-design-patterns-1.18.0/data-transfer-object/src/test/000077500000000000000000000000001322244523500233765ustar00rootroot00000000000000java-design-patterns-1.18.0/data-transfer-object/src/test/java/000077500000000000000000000000001322244523500243175ustar00rootroot00000000000000java-design-patterns-1.18.0/data-transfer-object/src/test/java/com/000077500000000000000000000000001322244523500250755ustar00rootroot00000000000000java-design-patterns-1.18.0/data-transfer-object/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500267255ustar00rootroot00000000000000java-design-patterns-1.18.0/data-transfer-object/src/test/java/com/iluwatar/datatransfer/000077500000000000000000000000001322244523500314035ustar00rootroot00000000000000CustomerResourceTest.java000066400000000000000000000055471322244523500363530ustar00rootroot00000000000000java-design-patterns-1.18.0/data-transfer-object/src/test/java/com/iluwatar/datatransfer/* * The MIT License (MIT) * * Copyright (c) 2017 Gopinath Langote * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.datatransfer; import org.junit.jupiter.api.Test; import java.util.ArrayList; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; /** * tests {@link CustomerResource}. */ public class CustomerResourceTest { @Test public void shouldGetAllCustomers() { CustomerDto customer = new CustomerDto("1", "Melody", "Yates"); List customers = new ArrayList<>(); customers.add(customer); CustomerResource customerResource = new CustomerResource(customers); List allCustomers = customerResource.getAllCustomers(); assertEquals(allCustomers.size(), 1); assertEquals(allCustomers.get(0).getId(), "1"); assertEquals(allCustomers.get(0).getFirstName(), "Melody"); assertEquals(allCustomers.get(0).getLastName(), "Yates"); } @Test public void shouldSaveCustomer() { CustomerDto customer = new CustomerDto("1", "Rita", "Reynolds"); CustomerResource customerResource = new CustomerResource(new ArrayList<>()); customerResource.save(customer); List allCustomers = customerResource.getAllCustomers(); assertEquals(allCustomers.get(0).getId(), "1"); assertEquals(allCustomers.get(0).getFirstName(), "Rita"); assertEquals(allCustomers.get(0).getLastName(), "Reynolds"); } @Test public void shouldDeleteCustomer() { CustomerDto customer = new CustomerDto("1", "Terry", "Nguyen"); List customers = new ArrayList<>(); customers.add(customer); CustomerResource customerResource = new CustomerResource(customers); customerResource.delete(customer.getId()); List allCustomers = customerResource.getAllCustomers(); assertEquals(allCustomers.size(), 0); } }java-design-patterns-1.18.0/decorator/000077500000000000000000000000001322244523500176135ustar00rootroot00000000000000java-design-patterns-1.18.0/decorator/README.md000066400000000000000000000111031322244523500210660ustar00rootroot00000000000000--- layout: pattern title: Decorator folder: decorator permalink: /patterns/decorator/ categories: Structural tags: - Java - Gang Of Four - Difficulty-Beginner --- ## Also known as Wrapper ## Intent Attach additional responsibilities to an object dynamically. Decorators provide a flexible alternative to subclassing for extending functionality. ## Explanation Real world example > There is an angry troll living in the nearby hills. Usually it goes bare handed but sometimes it has a weapon. To arm the troll it's not necessary to create a new troll but to decorate it dynamically with a suitable weapon. In plain words > Decorator pattern lets you dynamically change the behavior of an object at run time by wrapping them in an object of a decorator class. Wikipedia says > In object-oriented programming, the decorator pattern is a design pattern that allows behavior to be added to an individual object, either statically or dynamically, without affecting the behavior of other objects from the same class. The decorator pattern is often useful for adhering to the Single Responsibility Principle, as it allows functionality to be divided between classes with unique areas of concern. **Programmatic Example** Let's take the troll example. First of all we have a simple troll implementing the troll interface ``` public interface Troll { void attack(); int getAttackPower(); void fleeBattle(); } public class SimpleTroll implements Troll { private static final Logger LOGGER = LoggerFactory.getLogger(SimpleTroll.class); @Override public void attack() { LOGGER.info("The troll tries to grab you!"); } @Override public int getAttackPower() { return 10; } @Override public void fleeBattle() { LOGGER.info("The troll shrieks in horror and runs away!"); } } ``` Next we want to add club for the troll. We can do it dynamically by using a decorator ``` public class ClubbedTroll implements Troll { private static final Logger LOGGER = LoggerFactory.getLogger(ClubbedTroll.class); private Troll decorated; public ClubbedTroll(Troll decorated) { this.decorated = decorated; } @Override public void attack() { decorated.attack(); LOGGER.info("The troll swings at you with a club!"); } @Override public int getAttackPower() { return decorated.getAttackPower() + 10; } @Override public void fleeBattle() { decorated.fleeBattle(); } } ``` Here's the troll in action ``` // simple troll Troll troll = new SimpleTroll(); troll.attack(); // The troll tries to grab you! troll.fleeBattle(); // The troll shrieks in horror and runs away! // change the behavior of the simple troll by adding a decorator troll = new ClubbedTroll(troll); troll.attack(); // The troll tries to grab you! The troll swings at you with a club! troll.fleeBattle(); // The troll shrieks in horror and runs away! ``` ## Applicability Use Decorator * To add responsibilities to individual objects dynamically and transparently, that is, without affecting other objects * For responsibilities that can be withdrawn * When extension by subclassing is impractical. Sometimes a large number of independent extensions are possible and would produce an explosion of subclasses to support every combination. Or a class definition may be hidden or otherwise unavailable for subclassing ## Real world examples * [java.io.InputStream](http://docs.oracle.com/javase/8/docs/api/java/io/InputStream.html), [java.io.OutputStream](http://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html), [java.io.Reader](http://docs.oracle.com/javase/8/docs/api/java/io/Reader.html) and [java.io.Writer](http://docs.oracle.com/javase/8/docs/api/java/io/Writer.html) * [java.util.Collections#synchronizedXXX()](http://docs.oracle.com/javase/8/docs/api/java/util/Collections.html#synchronizedCollection-java.util.Collection-) * [java.util.Collections#unmodifiableXXX()](http://docs.oracle.com/javase/8/docs/api/java/util/Collections.html#unmodifiableCollection-java.util.Collection-) * [java.util.Collections#checkedXXX()](http://docs.oracle.com/javase/8/docs/api/java/util/Collections.html#checkedCollection-java.util.Collection-java.lang.Class-) ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) * [Functional Programming in Java: Harnessing the Power of Java 8 Lambda Expressions](http://www.amazon.com/Functional-Programming-Java-Harnessing-Expressions/dp/1937785467/ref=sr_1_1) * [J2EE Design Patterns](http://www.amazon.com/J2EE-Design-Patterns-William-Crawford/dp/0596004273/ref=sr_1_2) java-design-patterns-1.18.0/decorator/pom.xml000066400000000000000000000040641322244523500211340ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 decorator org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.mockito mockito-core test java-design-patterns-1.18.0/decorator/src/000077500000000000000000000000001322244523500204025ustar00rootroot00000000000000java-design-patterns-1.18.0/decorator/src/main/000077500000000000000000000000001322244523500213265ustar00rootroot00000000000000java-design-patterns-1.18.0/decorator/src/main/java/000077500000000000000000000000001322244523500222475ustar00rootroot00000000000000java-design-patterns-1.18.0/decorator/src/main/java/com/000077500000000000000000000000001322244523500230255ustar00rootroot00000000000000java-design-patterns-1.18.0/decorator/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500246555ustar00rootroot00000000000000java-design-patterns-1.18.0/decorator/src/main/java/com/iluwatar/decorator/000077500000000000000000000000001322244523500266375ustar00rootroot00000000000000java-design-patterns-1.18.0/decorator/src/main/java/com/iluwatar/decorator/App.java000066400000000000000000000047661322244523500302370ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.decorator; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * The Decorator pattern is a more flexible alternative to subclassing. The Decorator class * implements the same interface as the target and uses aggregation to "decorate" calls to the * target. Using the Decorator pattern it is possible to change the behavior of the class during * runtime. *

* In this example we show how the simple {@link SimpleTroll} first attacks and then flees the battle. * Then we decorate the {@link SimpleTroll} with a {@link ClubbedTroll} and perform the attack again. You * can see how the behavior changes after the decoration. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args command line args */ public static void main(String[] args) { // simple troll LOGGER.info("A simple looking troll approaches."); Troll troll = new SimpleTroll(); troll.attack(); troll.fleeBattle(); LOGGER.info("Simple troll power {}.\n", troll.getAttackPower()); // change the behavior of the simple troll by adding a decorator LOGGER.info("A troll with huge club surprises you."); troll = new ClubbedTroll(troll); troll.attack(); troll.fleeBattle(); LOGGER.info("Clubbed troll power {}.\n", troll.getAttackPower()); } } java-design-patterns-1.18.0/decorator/src/main/java/com/iluwatar/decorator/ClubbedTroll.java000066400000000000000000000034301322244523500320570ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.decorator; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Decorator that adds a club for the troll */ public class ClubbedTroll implements Troll { private static final Logger LOGGER = LoggerFactory.getLogger(ClubbedTroll.class); private Troll decorated; public ClubbedTroll(Troll decorated) { this.decorated = decorated; } @Override public void attack() { decorated.attack(); LOGGER.info("The troll swings at you with a club!"); } @Override public int getAttackPower() { return decorated.getAttackPower() + 10; } @Override public void fleeBattle() { decorated.fleeBattle(); } } java-design-patterns-1.18.0/decorator/src/main/java/com/iluwatar/decorator/SimpleTroll.java000066400000000000000000000032511322244523500317510ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.decorator; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * SimpleTroll implements {@link Troll} interface directly. * */ public class SimpleTroll implements Troll { private static final Logger LOGGER = LoggerFactory.getLogger(SimpleTroll.class); @Override public void attack() { LOGGER.info("The troll tries to grab you!"); } @Override public int getAttackPower() { return 10; } @Override public void fleeBattle() { LOGGER.info("The troll shrieks in horror and runs away!"); } } java-design-patterns-1.18.0/decorator/src/main/java/com/iluwatar/decorator/Troll.java000066400000000000000000000025041322244523500305770ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.decorator; /** * * Interface for trolls * */ public interface Troll { void attack(); int getAttackPower(); void fleeBattle(); } java-design-patterns-1.18.0/decorator/src/test/000077500000000000000000000000001322244523500213615ustar00rootroot00000000000000java-design-patterns-1.18.0/decorator/src/test/java/000077500000000000000000000000001322244523500223025ustar00rootroot00000000000000java-design-patterns-1.18.0/decorator/src/test/java/com/000077500000000000000000000000001322244523500230605ustar00rootroot00000000000000java-design-patterns-1.18.0/decorator/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500247105ustar00rootroot00000000000000java-design-patterns-1.18.0/decorator/src/test/java/com/iluwatar/decorator/000077500000000000000000000000001322244523500266725ustar00rootroot00000000000000java-design-patterns-1.18.0/decorator/src/test/java/com/iluwatar/decorator/AppTest.java000066400000000000000000000025121322244523500311150ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.decorator; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/decorator/src/test/java/com/iluwatar/decorator/ClubbedTrollTest.java000066400000000000000000000043171322244523500327570ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.decorator; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.mockito.Mockito.spy; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.internal.verification.VerificationModeFactory.times; /** * Tests for {@link ClubbedTroll} */ public class ClubbedTrollTest { @Test public void testClubbedTroll() throws Exception { // Create a normal troll first, but make sure we can spy on it later on. final Troll simpleTroll = spy(new SimpleTroll()); // Now we want to decorate the troll to make it stronger ... final Troll clubbed = new ClubbedTroll(simpleTroll); assertEquals(20, clubbed.getAttackPower()); verify(simpleTroll, times(1)).getAttackPower(); // Check if the clubbed troll actions are delegated to the decorated troll clubbed.attack(); verify(simpleTroll, times(1)).attack(); clubbed.fleeBattle(); verify(simpleTroll, times(1)).fleeBattle(); verifyNoMoreInteractions(simpleTroll); } } java-design-patterns-1.18.0/decorator/src/test/java/com/iluwatar/decorator/SimpleTrollTest.java000066400000000000000000000053521322244523500326500ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.decorator; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.slf4j.LoggerFactory; import java.util.LinkedList; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Tests for {@link SimpleTroll} */ public class SimpleTrollTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(SimpleTroll.class); } @AfterEach public void tearDown() { appender.stop(); } @Test public void testTrollActions() throws Exception { final SimpleTroll troll = new SimpleTroll(); assertEquals(10, troll.getAttackPower()); troll.attack(); assertEquals("The troll tries to grab you!", appender.getLastMessage()); troll.fleeBattle(); assertEquals("The troll shrieks in horror and runs away!", appender.getLastMessage()); assertEquals(2, appender.getLogSize()); } private class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender(Class clazz) { ((Logger) LoggerFactory.getLogger(clazz)).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public String getLastMessage() { return log.get(log.size() - 1).getMessage(); } public int getLogSize() { return log.size(); } } } java-design-patterns-1.18.0/delegation/000077500000000000000000000000001322244523500177445ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/README.md000066400000000000000000000014531322244523500212260ustar00rootroot00000000000000--- layout: pattern title: Delegation folder: delegation permalink: /patterns/delegation/ categories: Behavioral tags: - Java - Difficulty-Beginner --- ## Also known as Proxy Pattern ## Intent It is a technique where an object expresses certain behavior to the outside but in reality delegates responsibility for implementing that behaviour to an associated object. ![alt text](./etc/delegation.png "Delegate") ## Applicability Use the Delegate pattern in order to achieve the following * Reduce the coupling of methods to their class * Components that behave identically, but realize that this situation can change in the future. ## Credits * [Delegate Pattern: Wikipedia ](https://en.wikipedia.org/wiki/Delegation_pattern) * [Proxy Pattern: Wikipedia ](https://en.wikipedia.org/wiki/Proxy_pattern) java-design-patterns-1.18.0/delegation/etc/000077500000000000000000000000001322244523500205175ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/etc/delegation.png000066400000000000000000000612541322244523500233500ustar00rootroot00000000000000PNG  IHDR@$pbsIDATxXm 5]cA%*Ƃ`C4&;5*vQED`EE[XT:+w㸣}xfgg{̼7;E``̙(Jx k߸N<ǝ. 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AǽD޽`ʏ|7Yi.,Ʃ.adrQ;ٮ]wvS%%ʊ_%н7obp!a*,`6 ڵn6^ ј1!%*)j^}93l! q`,Fٛ :#t6 P8TQ||rы_"!Yf~;٫aqkZތO*,|+qƍsq= KKGcxXVuQVVk0Q;vɷ'5jC~Z+-Bp< 2xQ&`bnW&a !lW}=8U2F ũ^GMl:8Bb5rJ8>s Q>[pի !P4C <.{t0BdnC&a("Ɓ?$z!/_ggnlhiٓ6l׷ly-P! m p: 2B!`͗A>\aﱤYGf)f>%h java-design-patterns-1.18.0/delegation/pom.xml000066400000000000000000000040241322244523500212610ustar00rootroot00000000000000 java-design-patterns com.iluwatar 1.18.0 4.0.0 delegation org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/delegation/src/000077500000000000000000000000001322244523500205335ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/src/main/000077500000000000000000000000001322244523500214575ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/src/main/java/000077500000000000000000000000001322244523500224005ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/src/main/java/com/000077500000000000000000000000001322244523500231565ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500250065ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/src/main/java/com/iluwatar/delegation/000077500000000000000000000000001322244523500271215ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/src/main/java/com/iluwatar/delegation/simple/000077500000000000000000000000001322244523500304125ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/src/main/java/com/iluwatar/delegation/simple/App.java000066400000000000000000000056051322244523500320030ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.delegation.simple; import com.iluwatar.delegation.simple.printers.CanonPrinter; import com.iluwatar.delegation.simple.printers.EpsonPrinter; import com.iluwatar.delegation.simple.printers.HpPrinter; /** * The delegate pattern provides a mechanism to abstract away the implementation and control of the desired action. * The class being called in this case {@link PrinterController} is not responsible for the actual desired action, * but is actually delegated to a helper class either {@link CanonPrinter}, {@link EpsonPrinter} or {@link HpPrinter}. * The consumer does not have or require knowledge of the actual class carrying out the action, only the * container on which they are calling. * * In this example the delegates are {@link EpsonPrinter}, {@link HpPrinter} and {@link CanonPrinter} they all implement * {@link Printer}. The {@link PrinterController} class also implements {@link Printer}. However neither provide the * functionality of {@link Printer} by printing to the screen, they actually call upon the instance of {@link Printer} * that they were instantiated with. Therefore delegating the behaviour to another class. */ public class App { public static final String MESSAGE_TO_PRINT = "hello world"; /** * Program entry point * * @param args command line args */ public static void main(String[] args) { PrinterController hpPrinterController = new PrinterController(new HpPrinter()); PrinterController canonPrinterController = new PrinterController(new CanonPrinter()); PrinterController epsonPrinterController = new PrinterController(new EpsonPrinter()); hpPrinterController.print(MESSAGE_TO_PRINT); canonPrinterController.print(MESSAGE_TO_PRINT); epsonPrinterController.print(MESSAGE_TO_PRINT); } } java-design-patterns-1.18.0/delegation/src/main/java/com/iluwatar/delegation/simple/Printer.java000066400000000000000000000034551322244523500327070ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.delegation.simple; import com.iluwatar.delegation.simple.printers.CanonPrinter; import com.iluwatar.delegation.simple.printers.EpsonPrinter; import com.iluwatar.delegation.simple.printers.HpPrinter; /** * Interface that both the Controller and the Delegate will implement. * * @see CanonPrinter * @see EpsonPrinter * @see HpPrinter */ public interface Printer { /** * Method that takes a String to print to the screen. This will be implemented on both the * controller and the delegate allowing the controller to call the same method on the delegate class. * * @param message to be printed to the screen */ void print(final String message); } PrinterController.java000066400000000000000000000041441322244523500346700ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/src/main/java/com/iluwatar/delegation/simple/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.delegation.simple; /** * Delegator Class to delegate the implementation of the Printer. * This ensures two things: * - when the actual implementation of the Printer class changes the delegation will still be operational * - the actual benefit is observed when there are more than one implementors and they share a delegation control */ public class PrinterController implements Printer { private final Printer printer; public PrinterController(Printer printer) { this.printer = printer; } /** * This method is implemented from {@link Printer} however instead on providing an * implementation, it instead calls upon the class passed through the constructor. This is the delegate, * hence the pattern. Therefore meaning that the caller does not care of the implementing class only the owning * controller. * * @param message to be printed to the screen */ @Override public void print(String message) { printer.print(message); } } java-design-patterns-1.18.0/delegation/src/main/java/com/iluwatar/delegation/simple/printers/000077500000000000000000000000001322244523500322605ustar00rootroot00000000000000CanonPrinter.java000066400000000000000000000033161322244523500354510ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/src/main/java/com/iluwatar/delegation/simple/printers/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.delegation.simple.printers; import com.iluwatar.delegation.simple.Printer; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Specialised Implementation of {@link Printer} for a Canon Printer, in * this case the message to be printed is appended to "Canon Printer : " * * @see Printer */ public class CanonPrinter implements Printer { private static final Logger LOGGER = LoggerFactory.getLogger(CanonPrinter.class); /** * {@inheritDoc} */ @Override public void print(String message) { LOGGER.info("Canon Printer : {}", message); } } EpsonPrinter.java000066400000000000000000000033161322244523500354770ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/src/main/java/com/iluwatar/delegation/simple/printers/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.delegation.simple.printers; import com.iluwatar.delegation.simple.Printer; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Specialised Implementation of {@link Printer} for a Epson Printer, in * this case the message to be printed is appended to "Epson Printer : " * * @see Printer */ public class EpsonPrinter implements Printer { private static final Logger LOGGER = LoggerFactory.getLogger(EpsonPrinter.class); /** * {@inheritDoc} */ @Override public void print(String message) { LOGGER.info("Epson Printer : {}", message); } } HpPrinter.java000066400000000000000000000032771322244523500347700ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/src/main/java/com/iluwatar/delegation/simple/printers/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.delegation.simple.printers; import com.iluwatar.delegation.simple.Printer; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Specialised Implementation of {@link Printer} for a HP Printer, in * this case the message to be printed is appended to "HP Printer : " * * @see Printer */ public class HpPrinter implements Printer { private static final Logger LOGGER = LoggerFactory.getLogger(HpPrinter.class); /** * {@inheritDoc} */ @Override public void print(String message) { LOGGER.info("HP Printer : {}", message); } } java-design-patterns-1.18.0/delegation/src/test/000077500000000000000000000000001322244523500215125ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/src/test/java/000077500000000000000000000000001322244523500224335ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/src/test/java/com/000077500000000000000000000000001322244523500232115ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500250415ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/src/test/java/com/iluwatar/delegation/000077500000000000000000000000001322244523500271545ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/src/test/java/com/iluwatar/delegation/simple/000077500000000000000000000000001322244523500304455ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/src/test/java/com/iluwatar/delegation/simple/AppTest.java000066400000000000000000000025221322244523500326710ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.delegation.simple; import org.junit.jupiter.api.Test; /** * Application Test Entry */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } DelegateTest.java000066400000000000000000000065751322244523500336200ustar00rootroot00000000000000java-design-patterns-1.18.0/delegation/src/test/java/com/iluwatar/delegation/simple/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.delegation.simple; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import com.iluwatar.delegation.simple.printers.CanonPrinter; import com.iluwatar.delegation.simple.printers.EpsonPrinter; import com.iluwatar.delegation.simple.printers.HpPrinter; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.slf4j.LoggerFactory; import java.util.LinkedList; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Test for Delegation Pattern */ public class DelegateTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(); } @AfterEach public void tearDown() { appender.stop(); } private static final String MESSAGE = "Test Message Printed"; @Test public void testCanonPrinter() throws Exception { PrinterController printerController = new PrinterController(new CanonPrinter()); printerController.print(MESSAGE); assertEquals("Canon Printer : Test Message Printed", appender.getLastMessage()); } @Test public void testHpPrinter() throws Exception { PrinterController printerController = new PrinterController(new HpPrinter()); printerController.print(MESSAGE); assertEquals("HP Printer : Test Message Printed", appender.getLastMessage()); } @Test public void testEpsonPrinter() throws Exception { PrinterController printerController = new PrinterController(new EpsonPrinter()); printerController.print(MESSAGE); assertEquals("Epson Printer : Test Message Printed", appender.getLastMessage()); } /** * Logging Appender */ private class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender() { ((Logger) LoggerFactory.getLogger("root")).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public String getLastMessage() { return log.get(log.size() - 1).getFormattedMessage(); } public int getLogSize() { return log.size(); } } } java-design-patterns-1.18.0/dependency-injection/000077500000000000000000000000001322244523500217275ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/README.md000066400000000000000000000016061322244523500232110ustar00rootroot00000000000000--- layout: pattern title: Dependency Injection folder: dependency-injection permalink: /patterns/dependency-injection/ categories: Behavioral tags: - Java - Difficulty-Beginner --- ## Intent Dependency Injection is a software design pattern in which one or more dependencies (or services) are injected, or passed by reference, into a dependent object (or client) and are made part of the client's state. 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dependency.injection; /** * The MIT License * Copyright (c) 2014-2017 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ /** * AdvancedSorceress implements inversion of control. It depends on abstraction that can be injected * through its setter. */ public class AdvancedSorceress implements Wizard { private Tobacco tobacco; public void setTobacco(Tobacco tobacco) { this.tobacco = tobacco; } @Override public void smoke() { tobacco.smoke(this); } } AdvancedWizard.java000066400000000000000000000030161322244523500365430ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/main/java/com/iluwatar/dependency/injection/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dependency.injection; /** * * AdvancedWizard implements inversion of control. It depends on abstraction that can be injected * through its constructor. * */ public class AdvancedWizard implements Wizard { private Tobacco tobacco; public AdvancedWizard(Tobacco tobacco) { this.tobacco = tobacco; } @Override public void smoke() { tobacco.smoke(this); } } App.java000066400000000000000000000064201322244523500343770ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/main/java/com/iluwatar/dependency/injection/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dependency.injection; import com.google.inject.Guice; import com.google.inject.Injector; /** * Dependency Injection pattern deals with how objects handle their dependencies. The pattern * implements so called inversion of control principle. Inversion of control has two specific rules: * - High-level modules should not depend on low-level modules. Both should depend on abstractions. * - Abstractions should not depend on details. Details should depend on abstractions. *

* In this example we show you three different wizards. The first one ({@link SimpleWizard}) is a * naive implementation violating the inversion of control principle. It depends directly on a * concrete implementation which cannot be changed. *

* The second and third wizards({@link AdvancedWizard} and {@link AdvancedSorceress}) are more flexible. * They do not depend on any concrete implementation but abstraction. They utilizes Dependency Injection * pattern allowing their {@link Tobacco} dependency to be injected through constructor ({@link AdvancedWizard}) * or setter ({@link AdvancedSorceress}). This way, handling the dependency is no longer the wizard's * responsibility. It is resolved outside the wizard class. *

* The fourth example takes the pattern a step further. It uses Guice framework for Dependency * Injection. {@link TobaccoModule} binds a concrete implementation to abstraction. Injector is then * used to create {@link GuiceWizard} object with correct dependencies. */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { SimpleWizard simpleWizard = new SimpleWizard(); simpleWizard.smoke(); AdvancedWizard advancedWizard = new AdvancedWizard(new SecondBreakfastTobacco()); advancedWizard.smoke(); AdvancedSorceress advancedSorceress = new AdvancedSorceress(); advancedSorceress.setTobacco(new SecondBreakfastTobacco()); advancedSorceress.smoke(); Injector injector = Guice.createInjector(new TobaccoModule()); GuiceWizard guiceWizard = injector.getInstance(GuiceWizard.class); guiceWizard.smoke(); } } GuiceWizard.java000066400000000000000000000030561322244523500360760ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/main/java/com/iluwatar/dependency/injection/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dependency.injection; import javax.inject.Inject; /** * * GuiceWizard implements inversion of control. Its dependencies are injected through its * constructor by Guice framework. * */ public class GuiceWizard implements Wizard { private Tobacco tobacco; @Inject public GuiceWizard(Tobacco tobacco) { this.tobacco = tobacco; } @Override public void smoke() { tobacco.smoke(this); } } OldTobyTobacco.java000066400000000000000000000024361322244523500365310ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/main/java/com/iluwatar/dependency/injection/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dependency.injection; /** * * OldTobyTobacco concrete {@link Tobacco} implementation * */ public class OldTobyTobacco extends Tobacco { } RivendellTobacco.java000066400000000000000000000024421322244523500370760ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/main/java/com/iluwatar/dependency/injection/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dependency.injection; /** * * RivendellTobacco concrete {@link Tobacco} implementation * */ public class RivendellTobacco extends Tobacco { } SecondBreakfastTobacco.java000066400000000000000000000024561322244523500402150ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/main/java/com/iluwatar/dependency/injection/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dependency.injection; /** * * SecondBreakfastTobacco concrete {@link Tobacco} implementation * */ public class SecondBreakfastTobacco extends Tobacco { } SimpleWizard.java000066400000000000000000000027151322244523500362740ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/main/java/com/iluwatar/dependency/injection/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dependency.injection; /** * * Naive Wizard implementation violating the inversion of control principle. It should depend on * abstraction instead. * */ public class SimpleWizard implements Wizard { private OldTobyTobacco tobacco = new OldTobyTobacco(); public void smoke() { tobacco.smoke(this); } } Tobacco.java000066400000000000000000000030171322244523500352300ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/main/java/com/iluwatar/dependency/injection/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dependency.injection; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Tobacco abstraction * */ public abstract class Tobacco { private static final Logger LOGGER = LoggerFactory.getLogger(Tobacco.class); public void smoke(Wizard wizard) { LOGGER.info("{} smoking {}", wizard.getClass().getSimpleName(), this.getClass().getSimpleName()); } } TobaccoModule.java000066400000000000000000000027051322244523500364010ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/main/java/com/iluwatar/dependency/injection/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dependency.injection; import com.google.inject.AbstractModule; /** * * Guice module for binding certain concrete {@link Tobacco} implementation. * */ public class TobaccoModule extends AbstractModule { @Override protected void configure() { bind(Tobacco.class).to(RivendellTobacco.class); } } Wizard.java000066400000000000000000000023661322244523500351240ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/main/java/com/iluwatar/dependency/injection/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dependency.injection; /** * * Wizard interface * */ public interface Wizard { void smoke(); } java-design-patterns-1.18.0/dependency-injection/src/test/000077500000000000000000000000001322244523500234755ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/test/java/000077500000000000000000000000001322244523500244165ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/test/java/com/000077500000000000000000000000001322244523500251745ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500270245ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/test/java/com/iluwatar/dependency/000077500000000000000000000000001322244523500311425ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/test/java/com/iluwatar/dependency/injection/000077500000000000000000000000001322244523500331245ustar00rootroot00000000000000AdvancedSorceressTest.java000066400000000000000000000051501322244523500401470ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/test/java/com/iluwatar/dependency/injection/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dependency.injection; import com.iluwatar.dependency.injection.utils.InMemoryAppender; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Date: 28/04/17 - 7:40 AM * * @author Stanislav Kapinus */ public class AdvancedSorceressTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(Tobacco.class); } @AfterEach public void tearDown() { appender.stop(); } /** * Test if the {@link AdvancedSorceress} smokes whatever instance of {@link Tobacco} is passed to her * through the setter's parameter */ @Test public void testSmokeEveryThing() throws Exception { final Tobacco[] tobaccos = { new OldTobyTobacco(), new RivendellTobacco(), new SecondBreakfastTobacco() }; for (final Tobacco tobacco : tobaccos) { final AdvancedSorceress advancedSorceress = new AdvancedSorceress(); advancedSorceress.setTobacco(tobacco); advancedSorceress.smoke(); // Verify if the sorceress is smoking the correct tobacco ... assertEquals("AdvancedSorceress smoking " + tobacco.getClass().getSimpleName(), appender.getLastMessage()); } // ... and nothing else is happening. assertEquals(tobaccos.length, appender.getLogSize()); } } AdvancedWizardTest.java000066400000000000000000000047271322244523500374500ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/test/java/com/iluwatar/dependency/injection/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dependency.injection; import com.iluwatar.dependency.injection.utils.InMemoryAppender; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Date: 12/10/15 - 8:40 PM * * @author Jeroen Meulemeester */ public class AdvancedWizardTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(Tobacco.class); } @AfterEach public void tearDown() { appender.stop(); } /** * Test if the {@link AdvancedWizard} smokes whatever instance of {@link Tobacco} is passed to him * through the constructor parameter */ @Test public void testSmokeEveryThing() throws Exception { final Tobacco[] tobaccos = { new OldTobyTobacco(), new RivendellTobacco(), new SecondBreakfastTobacco() }; for (final Tobacco tobacco : tobaccos) { final AdvancedWizard advancedWizard = new AdvancedWizard(tobacco); advancedWizard.smoke(); // Verify if the wizard is smoking the correct tobacco ... assertEquals("AdvancedWizard smoking " + tobacco.getClass().getSimpleName(), appender.getLastMessage()); } // ... and nothing else is happening. assertEquals(tobaccos.length, appender.getLogSize()); } } AppTest.java000066400000000000000000000025251322244523500352740ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/test/java/com/iluwatar/dependency/injection/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dependency.injection; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } GuiceWizardTest.java000066400000000000000000000073461322244523500367770ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/test/java/com/iluwatar/dependency/injection/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dependency.injection; import com.google.inject.AbstractModule; import com.google.inject.Guice; import com.google.inject.Injector; import com.iluwatar.dependency.injection.utils.InMemoryAppender; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Date: 12/10/15 - 8:57 PM * * @author Jeroen Meulemeester */ public class GuiceWizardTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(Tobacco.class); } @AfterEach public void tearDown() { appender.stop(); } /** * Test if the {@link GuiceWizard} smokes whatever instance of {@link Tobacco} is passed to him * through the constructor parameter */ @Test public void testSmokeEveryThingThroughConstructor() throws Exception { final Tobacco[] tobaccos = { new OldTobyTobacco(), new RivendellTobacco(), new SecondBreakfastTobacco() }; for (final Tobacco tobacco : tobaccos) { final GuiceWizard guiceWizard = new GuiceWizard(tobacco); guiceWizard.smoke(); // Verify if the wizard is smoking the correct tobacco ... assertEquals("GuiceWizard smoking " + tobacco.getClass().getSimpleName(), appender.getLastMessage()); } // ... and nothing else is happening. assertEquals(tobaccos.length, appender.getLogSize()); } /** * Test if the {@link GuiceWizard} smokes whatever instance of {@link Tobacco} is passed to him * through the Guice google inject framework */ @Test public void testSmokeEveryThingThroughInjectionFramework() throws Exception { @SuppressWarnings("unchecked") final Class[] tobaccos = new Class[]{ OldTobyTobacco.class, RivendellTobacco.class, SecondBreakfastTobacco.class }; for (final Class tobaccoClass : tobaccos) { // Configure the tobacco in the injection framework ... final Injector injector = Guice.createInjector(new AbstractModule() { @Override protected void configure() { bind(Tobacco.class).to(tobaccoClass); } }); // ... and create a new wizard with it final GuiceWizard guiceWizard = injector.getInstance(GuiceWizard.class); guiceWizard.smoke(); // Verify if the wizard is smoking the correct tobacco ... assertEquals("GuiceWizard smoking " + tobaccoClass.getSimpleName(), appender.getLastMessage()); } // ... and nothing else is happening. assertEquals(tobaccos.length, appender.getLogSize()); } } SimpleWizardTest.java000066400000000000000000000040761322244523500371710ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/test/java/com/iluwatar/dependency/injection/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dependency.injection; import com.iluwatar.dependency.injection.utils.InMemoryAppender; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Date: 12/10/15 - 8:26 PM * * @author Jeroen Meulemeester */ public class SimpleWizardTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(Tobacco.class); } @AfterEach public void tearDown() { appender.stop(); } /** * Test if the {@link SimpleWizard} does the only thing it can do: Smoke it's {@link * OldTobyTobacco} */ @Test public void testSmoke() { final SimpleWizard simpleWizard = new SimpleWizard(); simpleWizard.smoke(); assertEquals("SimpleWizard smoking OldTobyTobacco", appender.getLastMessage()); assertEquals(1, appender.getLogSize()); } } utils/000077500000000000000000000000001322244523500342055ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/test/java/com/iluwatar/dependency/injectionInMemoryAppender.java000066400000000000000000000036361322244523500402760ustar00rootroot00000000000000java-design-patterns-1.18.0/dependency-injection/src/test/java/com/iluwatar/dependency/injection/utils/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.dependency.injection.utils; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import org.slf4j.LoggerFactory; import java.util.LinkedList; import java.util.List; /** * InMemory Log Appender Util. */ public class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender(Class clazz) { ((Logger) LoggerFactory.getLogger(clazz)).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public String getLastMessage() { return log.get(log.size() - 1).getFormattedMessage(); } public int getLogSize() { return log.size(); } } java-design-patterns-1.18.0/double-checked-locking/000077500000000000000000000000001322244523500221135ustar00rootroot00000000000000java-design-patterns-1.18.0/double-checked-locking/README.md000066400000000000000000000017541322244523500234010ustar00rootroot00000000000000--- layout: pattern title: Double Checked Locking folder: double-checked-locking permalink: /patterns/double-checked-locking/ categories: Concurrency tags: - Java - Difficulty-Beginner - Idiom --- ## Intent Reduce the overhead of acquiring a lock by first testing the locking criterion (the "lock hint") without actually acquiring the lock. Only if the locking criterion check indicates that locking is required does the actual locking logic proceed. ![alt text](./etc/double_checked_locking_1.png "Double Checked Locking") ## Applicability Use the Double Checked Locking pattern when * there is a concurrent access in object creation, e.g. singleton, where you want to create single instance of the same class and checking if it's null or not maybe not be enough when there are two or more threads that checks if instance is null or not. * there is a concurrent access on a method where method's behaviour changes according to the some constraints and these constraint change within this method. java-design-patterns-1.18.0/double-checked-locking/etc/000077500000000000000000000000001322244523500226665ustar00rootroot00000000000000java-design-patterns-1.18.0/double-checked-locking/etc/double-checked-locking.png000066400000000000000000000155431322244523500276660ustar00rootroot00000000000000PNG  IHDR8NQ{*IDATx]ŵGDc V FȖ/2'b vklN!q5H A8wUBŏsOUޚꩮ8U`.`#j .Ui1<߿ Ag A.ȃAn4z-L[cYg5H zcSvKUc.yg>` f;-݅Hݞ\O@w[ŶI@x+JeóޑHM [smG:ee1^\*fǻb8H(zǓ#-1,MlU[LmYfg/BwyB{#%Z5}S!Umy3i|s$_fo{l"]7,*r(f{^1(%kGX|i"X϶ ^{PE.mCæ֔+0Iߪ$۲P l"mQ~[;Kf1ξI6blD yА An 7y<ȍ@F rƒwKz׋x~ŲHq~TPf{Ec{jer [->] $O]wL<ɷ?];KGwi >:a)MVMvmṾlo4 wщM_80ig k9=Oɋ8zE Ax'3)7O !aMlX)]5U3nWWv|[H,,=WLY6uW!GūV0* CiY '(aZy>u}Y t<ːLv;ši֛Цg>j\_ǁ~flN^N%x%ɷ$۵7<.ٱj ={@|skZ9y}7pta /Μ'(u7-;W}xK,e"cw9y)].@-:?fM^f[nۿ/>mw۞P%j'W3ōr^A 7y<ȍ@F r#I{ OLCQ g{ e9?Q5sWWk灼WZőxt0#|#f_,YLFE`c)6b&W1 3EPk#Rӑrۄa\ͼǩ^d7 Njm;% V$a BXTLcD246" EI2U3f&hg?*Lmѐ0!WM8K/ĦT܊<3ӱ L2]g#/>VR<>ǎmTGh9p>Fhd] 5+ک;-LQ yD-\^y6YlcE&qYچ)47s_v^4yN|^pۅ4.6SHZ%}^/1lr“L&PHǙ}-So 7E#yIO|sʽSt\kmX>ϴ/ Q>/kR[5ȳÞ4-p٬U'PZj@m*t& <*!<qW r#ȃAnēw _h`U` >rZ[ȉ@F r#ȃܨ _C5" &uHǑZբ)1uECTn_Ce0mpQ˺J]"E S{F=ioYyC&ޕ J{q>2AC09HҪW8gyjv4KLjfMQV\8XmSpҗִ;I>ȋU}2}0鉤0mӴ!$ucFlP7RR{Y}/A}zn?&{%2)}Xh)/Z=[.\@|gbEQkL-]Wԙw2nKi O퐬u7dG4lϚ*Um^Ҹ϶aU@MaSC b8UCɃ^ r#ȃAnT3)@ٷtE& .ȃܨX>uUJFKFY2bوvhΆT 納ϋ褠X> ]̐ LU$sÆ~ a\?K^E*b$^jlUJmmI,ʧf_PeJM+l+EAn 7y<ȍ@F r#<0 F-<ȍʓ׿/M~~?>P]T^/`nby}h0s_%;9U"'Y*PmE XeH}yc_yOqSw.X`0ѺS ^_xP,M ?d3d͗+y[_'N{$aS$J٤:L3Μ/|}nW{{. #~D)[T$.gb $;<:V:6_OHej&UY+@s{W~hͩSNE-K9žXWr?a|=t~z,O5O&+fbG}}USg~U L+/d&kRl;x5:VEc}"ϫ@M&,|èB %/lr:g405U L}Xkl@5y9T>&^`@^:y\L2wab83' C-0Uw0^<$߰(y_1.Y?*ծybJwjIQ&fM^vrb jj/gLC8+-m.֎0CYzVGML2i}^j+VGϕKٳ:R3c^ikV>AdGkAĴ` 1 #X劽϶Qguȫ !g Qʥp!g Qx*p{RO4y<ȍx0 jgbqׇPcyŭ+n8w 1]qye 箸2sW@^ù+n 7Wp+c8w 1]qyeYn%X{yenQ[z]d^a3Wt-zth^ɎgVP!5$WQ]tood`C#@$h`Ȭ B6.IY'԰Mb~/l ”#^n0ˑ7V{5l1YYק- +c'Olgmp 5"[4h }mk(yQ϶yު55MFjw1]qye 箸2sW@^ù+n {OJHk]T] 尉'%O.r'|r7n/&Otݡ@^>n/&|F^@^1y-v{ypx +b6W'ȃ+l W'ȃ+l yKM c y->U=An 7yy XoeF֙pG +X+)?l%;jC)<1 0 ۓ 5Qț&+JJD*yKzGj"9H61l͵:w-xmpQze E6ϣyROڎİ61VVm3em! 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.doublechecked.locking; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; /** * * Double Checked Locking is a concurrency design pattern used to reduce the overhead of acquiring a * lock by first testing the locking criterion (the "lock hint") without actually acquiring the * lock. Only if the locking criterion check indicates that locking is required does the actual * locking logic proceed. *

* In {@link Inventory} we store the items with a given size. However, we do not store more items * than the inventory size. To address concurrent access problems we use double checked locking to * add item to inventory. In this method, the thread which gets the lock first adds the item. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args command line args */ public static void main(String[] args) { final Inventory inventory = new Inventory(1000); ExecutorService executorService = Executors.newFixedThreadPool(3); for (int i = 0; i < 3; i++) { executorService.execute(() -> { while (inventory.addItem(new Item())) {}; }); } executorService.shutdown(); try { executorService.awaitTermination(5, TimeUnit.SECONDS); } catch (InterruptedException e) { LOGGER.error("Error waiting for ExecutorService shutdown"); } } } Inventory.java000066400000000000000000000047121322244523500361510ustar00rootroot00000000000000java-design-patterns-1.18.0/double-checked-locking/src/main/java/com/iluwatar/doublechecked/locking/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.doublechecked.locking; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.ArrayList; import java.util.Collections; import java.util.List; import java.util.concurrent.locks.Lock; import java.util.concurrent.locks.ReentrantLock; /** * * Inventory * */ public class Inventory { private static final Logger LOGGER = LoggerFactory.getLogger(Inventory.class); private final int inventorySize; private final List items; private final Lock lock; /** * Constructor */ public Inventory(int inventorySize) { this.inventorySize = inventorySize; this.items = new ArrayList<>(inventorySize); this.lock = new ReentrantLock(); } /** * Add item */ public boolean addItem(Item item) { if (items.size() < inventorySize) { lock.lock(); try { if (items.size() < inventorySize) { items.add(item); LOGGER.info("{}: items.size()={}, inventorySize={}", Thread.currentThread(), items.size(), inventorySize); return true; } } finally { lock.unlock(); } } return false; } /** * Get all the items in the inventory * * @return All the items of the inventory, as an unmodifiable list */ public final List getItems() { return Collections.unmodifiableList(items); } } Item.java000066400000000000000000000023231322244523500350460ustar00rootroot00000000000000java-design-patterns-1.18.0/double-checked-locking/src/main/java/com/iluwatar/doublechecked/locking/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.doublechecked.locking; /** * * Item * */ public class Item { } java-design-patterns-1.18.0/double-checked-locking/src/main/resources/000077500000000000000000000000001322244523500256405ustar00rootroot00000000000000java-design-patterns-1.18.0/double-checked-locking/src/main/resources/logback.xml000066400000000000000000000040151322244523500277640ustar00rootroot00000000000000 double-checked-locking.log double-checked-locking-%d.log 5 %-5p [%d{ISO8601,UTC}] %c: %m%n %-5p [%d{ISO8601,UTC}] %c: %m%n java-design-patterns-1.18.0/double-checked-locking/src/test/000077500000000000000000000000001322244523500236615ustar00rootroot00000000000000java-design-patterns-1.18.0/double-checked-locking/src/test/java/000077500000000000000000000000001322244523500246025ustar00rootroot00000000000000java-design-patterns-1.18.0/double-checked-locking/src/test/java/com/000077500000000000000000000000001322244523500253605ustar00rootroot00000000000000java-design-patterns-1.18.0/double-checked-locking/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500272105ustar00rootroot00000000000000java-design-patterns-1.18.0/double-checked-locking/src/test/java/com/iluwatar/doublechecked/000077500000000000000000000000001322244523500317715ustar00rootroot00000000000000java-design-patterns-1.18.0/double-checked-locking/src/test/java/com/iluwatar/doublechecked/locking/000077500000000000000000000000001322244523500334175ustar00rootroot00000000000000AppTest.java000066400000000000000000000025261322244523500355700ustar00rootroot00000000000000java-design-patterns-1.18.0/double-checked-locking/src/test/java/com/iluwatar/doublechecked/locking/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.doublechecked.locking; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } InventoryTest.java000066400000000000000000000106051322244523500370420ustar00rootroot00000000000000java-design-patterns-1.18.0/double-checked-locking/src/test/java/com/iluwatar/doublechecked/locking/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.doublechecked.locking; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.slf4j.LoggerFactory; import java.util.LinkedList; import java.util.List; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; import static java.time.Duration.ofMillis; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertTimeout; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Date: 12/10/15 - 9:34 PM * * @author Jeroen Meulemeester */ public class InventoryTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(Inventory.class); } @AfterEach public void tearDown() { appender.stop(); } /** * The number of threads used to stress test the locking of the {@link Inventory#addItem(Item)} * method */ private static final int THREAD_COUNT = 8; /** * The maximum number of {@link Item}s allowed in the {@link Inventory} */ private static final int INVENTORY_SIZE = 1000; /** * Concurrently add multiple items to the inventory, and check if the items were added in order by * checking the stdOut for continuous growth of the inventory. When 'items.size()=xx' shows up out * of order, it means that the locking is not ok, increasing the risk of going over the inventory * item limit. */ @Test public void testAddItem() throws Exception { assertTimeout(ofMillis(10000), () -> { // Create a new inventory with a limit of 1000 items and put some load on the add method final Inventory inventory = new Inventory(INVENTORY_SIZE); final ExecutorService executorService = Executors.newFixedThreadPool(THREAD_COUNT); for (int i = 0; i < THREAD_COUNT; i++) { executorService.execute(() -> { while (inventory.addItem(new Item())) {}; }); } // Wait until all threads have finished executorService.shutdown(); executorService.awaitTermination(5, TimeUnit.SECONDS); // Check the number of items in the inventory. It should not have exceeded the allowed maximum final List items = inventory.getItems(); assertNotNull(items); assertEquals(INVENTORY_SIZE, items.size()); assertEquals(INVENTORY_SIZE, appender.getLogSize()); // ... and check if the inventory size is increasing continuously for (int i = 0; i < items.size(); i++) { assertTrue(appender.log.get(i).getFormattedMessage().contains("items.size()=" + (i + 1))); } }); } private class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender(Class clazz) { ((Logger) LoggerFactory.getLogger(clazz)).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public int getLogSize() { return log.size(); } } } java-design-patterns-1.18.0/double-dispatch/000077500000000000000000000000001322244523500207005ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/README.md000066400000000000000000000012301322244523500221530ustar00rootroot00000000000000--- layout: pattern title: Double Dispatch folder: double-dispatch permalink: /patterns/double-dispatch/ categories: Other tags: - Java - Difficulty-Intermediate - Idiom --- ## Intent Double Dispatch pattern is a way to create maintainable dynamic behavior based on receiver and parameter types. ![alt text](./etc/double-dispatch.png "Double Dispatch") ## Applicability Use the Double Dispatch pattern when * the dynamic behavior is not defined only based on receiving object's type but also on the receiving method's parameter type. ## Real world examples * [ObjectOutputStream](https://docs.oracle.com/javase/8/docs/api/java/io/ObjectOutputStream.html) java-design-patterns-1.18.0/double-dispatch/etc/000077500000000000000000000000001322244523500214535ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/etc/double-dispatch.png000066400000000000000000000771541322244523500252460ustar00rootroot00000000000000PNG  IHDRt~3IDATxoW}ժRd]=>Ry"m5-jP\ L )Gi`8qBv4lBZ*o4AH}gߵf5f5k|>h3fYg& V}04h\wLB%}7(Z. 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-&ߔh';CZ\|x/H t:5 !-uHk java-design-patterns-1.18.0/double-dispatch/pom.xml000066400000000000000000000040721322244523500222200ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 double-dispatch org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.mockito mockito-core test java-design-patterns-1.18.0/double-dispatch/src/000077500000000000000000000000001322244523500214675ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/main/000077500000000000000000000000001322244523500224135ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/main/java/000077500000000000000000000000001322244523500233345ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/main/java/com/000077500000000000000000000000001322244523500241125ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500257425ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/main/java/com/iluwatar/doubledispatch/000077500000000000000000000000001322244523500307345ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/main/java/com/iluwatar/doubledispatch/App.java000066400000000000000000000065041322244523500323240ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.doubledispatch; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.ArrayList; import java.util.List; /** * * When a message with a parameter is sent to an object, the resultant behaviour is defined by the implementation of * that method in the receiver. Sometimes the behaviour must also be determined by the type of the parameter. *

* One way to implement this would be to create multiple instanceof-checks for the methods parameter. However, this * creates a maintenance issue. When new types are added we would also need to change the method's implementation and * add a new instanceof-check. This violates the single responsibility principle - a class should have only one reason * to change. *

* Instead of the instanceof-checks a better way is to make another virtual call on the parameter object. This way new * functionality can be easily added without the need to modify existing implementation (open-closed principle). *

* In this example we have hierarchy of objects ({@link GameObject}) that can collide to each other. Each object has its * own coordinates which are checked against the other objects' coordinates. If there is an overlap, then the objects * collide utilizing the Double Dispatch pattern. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args * command line args */ public static void main(String[] args) { // initialize game objects and print their status List objects = new ArrayList<>(); objects.add(new FlamingAsteroid(0, 0, 5, 5)); objects.add(new SpaceStationMir(1, 1, 2, 2)); objects.add(new Meteoroid(10, 10, 15, 15)); objects.add(new SpaceStationIss(12, 12, 14, 14)); objects.stream().forEach(o -> LOGGER.info(o.toString())); LOGGER.info(""); // collision check objects.stream().forEach(o1 -> objects.stream().forEach(o2 -> { if (o1 != o2 && o1.intersectsWith(o2)) { o1.collision(o2); } })); LOGGER.info(""); // output eventual object statuses objects.stream().forEach(o -> LOGGER.info(o.toString())); LOGGER.info(""); } } FlamingAsteroid.java000066400000000000000000000027561322244523500346020ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/main/java/com/iluwatar/doubledispatch/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.doubledispatch; /** * * Flaming asteroid game object * */ public class FlamingAsteroid extends Meteoroid { public FlamingAsteroid(int left, int top, int right, int bottom) { super(left, top, right, bottom); setOnFire(true); } @Override public void collision(GameObject gameObject) { gameObject.collisionResolve(this); } } GameObject.java000066400000000000000000000043051322244523500335220ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/main/java/com/iluwatar/doubledispatch/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.doubledispatch; /** * * Game objects have coordinates and some other status information. * */ public abstract class GameObject extends Rectangle { private boolean damaged; private boolean onFire; public GameObject(int left, int top, int right, int bottom) { super(left, top, right, bottom); } @Override public String toString() { return String.format("%s at %s damaged=%b onFire=%b", this.getClass().getSimpleName(), super.toString(), isDamaged(), isOnFire()); } public boolean isOnFire() { return onFire; } public void setOnFire(boolean onFire) { this.onFire = onFire; } public boolean isDamaged() { return damaged; } public void setDamaged(boolean damaged) { this.damaged = damaged; } public abstract void collision(GameObject gameObject); public abstract void collisionResolve(FlamingAsteroid asteroid); public abstract void collisionResolve(Meteoroid meteoroid); public abstract void collisionResolve(SpaceStationMir mir); public abstract void collisionResolve(SpaceStationIss iss); } java-design-patterns-1.18.0/double-dispatch/src/main/java/com/iluwatar/doubledispatch/Meteoroid.java000066400000000000000000000044031322244523500335270ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.doubledispatch; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Meteoroid game object * */ public class Meteoroid extends GameObject { private static final Logger LOGGER = LoggerFactory.getLogger(Meteoroid.class); public Meteoroid(int left, int top, int right, int bottom) { super(left, top, right, bottom); } @Override public void collision(GameObject gameObject) { gameObject.collisionResolve(this); } @Override public void collisionResolve(FlamingAsteroid asteroid) { LOGGER.info("{} hits {}.", asteroid.getClass().getSimpleName(), this.getClass().getSimpleName()); } @Override public void collisionResolve(Meteoroid meteoroid) { LOGGER.info("{} hits {}.", meteoroid.getClass().getSimpleName(), this.getClass().getSimpleName()); } @Override public void collisionResolve(SpaceStationMir mir) { LOGGER.info("{} hits {}.", mir.getClass().getSimpleName(), this.getClass().getSimpleName()); } @Override public void collisionResolve(SpaceStationIss iss) { LOGGER.info("{} hits {}.", iss.getClass().getSimpleName(), this.getClass().getSimpleName()); } } java-design-patterns-1.18.0/double-dispatch/src/main/java/com/iluwatar/doubledispatch/Rectangle.java000066400000000000000000000040501322244523500335020ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.doubledispatch; /** * * Rectangle has coordinates and can be checked for overlap against other Rectangles. * */ public class Rectangle { private int left; private int top; private int right; private int bottom; /** * Constructor */ public Rectangle(int left, int top, int right, int bottom) { this.left = left; this.top = top; this.right = right; this.bottom = bottom; } public int getLeft() { return left; } public int getTop() { return top; } public int getRight() { return right; } public int getBottom() { return bottom; } boolean intersectsWith(Rectangle r) { return !(r.getLeft() > getRight() || r.getRight() < getLeft() || r.getTop() > getBottom() || r .getBottom() < getTop()); } @Override public String toString() { return String.format("[%d,%d,%d,%d]", getLeft(), getTop(), getRight(), getBottom()); } } SpaceStationIss.java000066400000000000000000000027401322244523500345770ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/main/java/com/iluwatar/doubledispatch/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.doubledispatch; /** * * Space station ISS game object * */ public class SpaceStationIss extends SpaceStationMir { public SpaceStationIss(int left, int top, int right, int bottom) { super(left, top, right, bottom); } @Override public void collision(GameObject gameObject) { gameObject.collisionResolve(this); } } SpaceStationMir.java000066400000000000000000000052361322244523500345730ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/main/java/com/iluwatar/doubledispatch/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.doubledispatch; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Space station Mir game object * */ public class SpaceStationMir extends GameObject { private static final Logger LOGGER = LoggerFactory.getLogger(SpaceStationMir.class); public SpaceStationMir(int left, int top, int right, int bottom) { super(left, top, right, bottom); } @Override public void collision(GameObject gameObject) { gameObject.collisionResolve(this); } @Override public void collisionResolve(FlamingAsteroid asteroid) { LOGGER.info("{} hits {}. {} is damaged! {} is set on fire!", asteroid.getClass().getSimpleName(), this.getClass().getSimpleName(), this.getClass().getSimpleName(), this.getClass().getSimpleName()); setDamaged(true); setOnFire(true); } @Override public void collisionResolve(Meteoroid meteoroid) { LOGGER.info("{} hits {}. {} is damaged!", meteoroid.getClass().getSimpleName(), this.getClass().getSimpleName(), this.getClass().getSimpleName()); setDamaged(true); } @Override public void collisionResolve(SpaceStationMir mir) { LOGGER.info("{} hits {}. {} is damaged!", mir.getClass().getSimpleName(), this.getClass().getSimpleName(), this.getClass().getSimpleName()); setDamaged(true); } @Override public void collisionResolve(SpaceStationIss iss) { LOGGER.info("{} hits {}. {} is damaged!", iss.getClass().getSimpleName(), this.getClass().getSimpleName(), this.getClass().getSimpleName()); setDamaged(true); } } java-design-patterns-1.18.0/double-dispatch/src/test/000077500000000000000000000000001322244523500224465ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/test/java/000077500000000000000000000000001322244523500233675ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/test/java/com/000077500000000000000000000000001322244523500241455ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500257755ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/test/java/com/iluwatar/doubledispatch/000077500000000000000000000000001322244523500307675ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/test/java/com/iluwatar/doubledispatch/AppTest.java000066400000000000000000000025171322244523500332170ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.doubledispatch; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } CollisionTest.java000066400000000000000000000107111322244523500343460ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/test/java/com/iluwatar/doubledispatch/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.doubledispatch; import java.util.Objects; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Date: 12/10/15 - 8:37 PM * Test for Collision * @param Type of GameObject * @author Jeroen Meulemeester */ public abstract class CollisionTest { /** * Get the tested object * * @return The tested object, should never return 'null' */ abstract O getTestedObject(); /** * Collide the tested item with the other given item and verify if the damage and fire state is as * expected * * @param other The other object we have to collide with * @param otherDamaged Indicates if the other object should be damaged after the collision * @param otherOnFire Indicates if the other object should be burning after the collision * @param thisDamaged Indicates if the test object should be damaged after the collision * @param thisOnFire Indicates if the other object should be burning after the collision * @param description The expected description of the collision */ void testCollision(final GameObject other, final boolean otherDamaged, final boolean otherOnFire, final boolean thisDamaged, final boolean thisOnFire, final String description) { Objects.requireNonNull(other); Objects.requireNonNull(getTestedObject()); final O tested = getTestedObject(); tested.collision(other); testOnFire(other, tested, otherOnFire); testDamaged(other, tested, otherDamaged); testOnFire(tested, other, thisOnFire); testDamaged(tested, other, thisDamaged); } /** * Test if the fire state of the target matches the expected state after colliding with the given * object * * @param target The target object * @param other The other object * @param expectTargetOnFire The expected state of fire on the target object */ private void testOnFire(final GameObject target, final GameObject other, final boolean expectTargetOnFire) { final String targetName = target.getClass().getSimpleName(); final String otherName = other.getClass().getSimpleName(); final String errorMessage = expectTargetOnFire ? "Expected [" + targetName + "] to be on fire after colliding with [" + otherName + "] but it was not!" : "Expected [" + targetName + "] not to be on fire after colliding with [" + otherName + "] but it was!"; assertEquals(expectTargetOnFire, target.isOnFire(), errorMessage); } /** * Test if the damage state of the target matches the expected state after colliding with the * given object * * @param target The target object * @param other The other object * @param expectedDamage The expected state of damage on the target object */ private void testDamaged(final GameObject target, final GameObject other, final boolean expectedDamage) { final String targetName = target.getClass().getSimpleName(); final String otherName = other.getClass().getSimpleName(); final String errorMessage = expectedDamage ? "Expected [" + targetName + "] to be damaged after colliding with [" + otherName + "] but it was not!" : "Expected [" + targetName + "] not to be damaged after colliding with [" + otherName + "] but it was!"; assertEquals(expectedDamage, target.isDamaged(), errorMessage); } } FlamingAsteroidTest.java000066400000000000000000000064331322244523500354710ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/test/java/com/iluwatar/doubledispatch/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.doubledispatch; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Date: 12/10/15 - 11:31 PM * * @author Jeroen Meulemeester */ public class FlamingAsteroidTest extends CollisionTest { @Override final FlamingAsteroid getTestedObject() { return new FlamingAsteroid(1, 2, 3, 4); } /** * Test the constructor parameters */ @Test public void testConstructor() { final FlamingAsteroid asteroid = new FlamingAsteroid(1, 2, 3, 4); assertEquals(1, asteroid.getLeft()); assertEquals(2, asteroid.getTop()); assertEquals(3, asteroid.getRight()); assertEquals(4, asteroid.getBottom()); assertTrue(asteroid.isOnFire()); assertFalse(asteroid.isDamaged()); assertEquals("FlamingAsteroid at [1,2,3,4] damaged=false onFire=true", asteroid.toString()); } /** * Test what happens we collide with an asteroid */ @Test public void testCollideFlamingAsteroid() { testCollision( new FlamingAsteroid(1, 2, 3, 4), false, true, false, true, "FlamingAsteroid hits FlamingAsteroid." ); } /** * Test what happens we collide with an meteoroid */ @Test public void testCollideMeteoroid() { testCollision( new Meteoroid(1, 1, 3, 4), false, false, false, true, "FlamingAsteroid hits Meteoroid." ); } /** * Test what happens we collide with ISS */ @Test public void testCollideSpaceStationIss() { testCollision( new SpaceStationIss(1, 1, 3, 4), true, true, false, true, "FlamingAsteroid hits SpaceStationIss. SpaceStationIss is damaged! SpaceStationIss is set on fire!" ); } /** * Test what happens we collide with MIR */ @Test public void testCollideSpaceStationMir() { testCollision( new SpaceStationMir(1, 1, 3, 4), true, true, false, true, "FlamingAsteroid hits SpaceStationMir. SpaceStationMir is damaged! SpaceStationMir is set on fire!" ); } }MeteoroidTest.java000066400000000000000000000061561322244523500343520ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/test/java/com/iluwatar/doubledispatch/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.doubledispatch; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; /** * Date: 12/10/15 - 11:31 PM * * @author Jeroen Meulemeester */ public class MeteoroidTest extends CollisionTest { @Override final Meteoroid getTestedObject() { return new Meteoroid(1, 2, 3, 4); } /** * Test the constructor parameters */ @Test public void testConstructor() { final Meteoroid meteoroid = new Meteoroid(1, 2, 3, 4); assertEquals(1, meteoroid.getLeft()); assertEquals(2, meteoroid.getTop()); assertEquals(3, meteoroid.getRight()); assertEquals(4, meteoroid.getBottom()); assertFalse(meteoroid.isOnFire()); assertFalse(meteoroid.isDamaged()); assertEquals("Meteoroid at [1,2,3,4] damaged=false onFire=false", meteoroid.toString()); } /** * Test what happens we collide with an asteroid */ @Test public void testCollideFlamingAsteroid() { testCollision( new FlamingAsteroid(1, 1, 3, 4), false, true, false, false, "Meteoroid hits FlamingAsteroid." ); } /** * Test what happens we collide with an meteoroid */ @Test public void testCollideMeteoroid() { testCollision( new Meteoroid(1, 1, 3, 4), false, false, false, false, "Meteoroid hits Meteoroid." ); } /** * Test what happens we collide with ISS */ @Test public void testCollideSpaceStationIss() { testCollision( new SpaceStationIss(1, 1, 3, 4), true, false, false, false, "Meteoroid hits SpaceStationIss. SpaceStationIss is damaged!" ); } /** * Test what happens we collide with MIR */ @Test public void testCollideSpaceStationMir() { testCollision( new SpaceStationMir(1, 1, 3, 4), true, false, false, false, "Meteoroid hits SpaceStationMir. SpaceStationMir is damaged!" ); } }RectangleTest.java000066400000000000000000000051261322244523500343230ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/test/java/com/iluwatar/doubledispatch/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.doubledispatch; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Unit test for Rectangle */ public class RectangleTest { /** * Test if the values passed through the constructor matches the values fetched from the getters */ @Test public void testConstructor() { final Rectangle rectangle = new Rectangle(1, 2, 3, 4); assertEquals(1, rectangle.getLeft()); assertEquals(2, rectangle.getTop()); assertEquals(3, rectangle.getRight()); assertEquals(4, rectangle.getBottom()); } /** * Test if the values passed through the constructor matches the values in the {@link * #toString()} */ @Test public void testToString() throws Exception { final Rectangle rectangle = new Rectangle(1, 2, 3, 4); assertEquals("[1,2,3,4]", rectangle.toString()); } /** * Test if the {@link Rectangle} class can detect if it intersects with another rectangle. */ @Test public void testIntersection() { assertTrue(new Rectangle(0, 0, 1, 1).intersectsWith(new Rectangle(0, 0, 1, 1))); assertTrue(new Rectangle(0, 0, 1, 1).intersectsWith(new Rectangle(-1, -5, 7, 8))); assertFalse(new Rectangle(0, 0, 1, 1).intersectsWith(new Rectangle(2, 2, 3, 3))); assertFalse(new Rectangle(0, 0, 1, 1).intersectsWith(new Rectangle(-2, -2, -1, -1))); } } SpaceStationIssTest.java000066400000000000000000000062001322244523500354650ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/test/java/com/iluwatar/doubledispatch/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.doubledispatch; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; /** * Date: 12/10/15 - 11:31 PM * * @author Jeroen Meulemeester */ public class SpaceStationIssTest extends CollisionTest { @Override final SpaceStationIss getTestedObject() { return new SpaceStationIss(1, 2, 3, 4); } /** * Test the constructor parameters */ @Test public void testConstructor() { final SpaceStationIss iss = new SpaceStationIss(1, 2, 3, 4); assertEquals(1, iss.getLeft()); assertEquals(2, iss.getTop()); assertEquals(3, iss.getRight()); assertEquals(4, iss.getBottom()); assertFalse(iss.isOnFire()); assertFalse(iss.isDamaged()); assertEquals("SpaceStationIss at [1,2,3,4] damaged=false onFire=false", iss.toString()); } /** * Test what happens we collide with an asteroid */ @Test public void testCollideFlamingAsteroid() { testCollision( new FlamingAsteroid(1, 1, 3, 4), false, true, false, false, "SpaceStationIss hits FlamingAsteroid." ); } /** * Test what happens we collide with an meteoroid */ @Test public void testCollideMeteoroid() { testCollision( new Meteoroid(1, 1, 3, 4), false, false, false, false, "SpaceStationIss hits Meteoroid." ); } /** * Test what happens we collide with ISS */ @Test public void testCollideSpaceStationIss() { testCollision( new SpaceStationIss(1, 1, 3, 4), true, false, false, false, "SpaceStationIss hits SpaceStationIss. SpaceStationIss is damaged!" ); } /** * Test what happens we collide with MIR */ @Test public void testCollideSpaceStationMir() { testCollision( new SpaceStationMir(1, 1, 3, 4), true, false, false, false, "SpaceStationIss hits SpaceStationMir. SpaceStationMir is damaged!" ); } }SpaceStationMirTest.java000066400000000000000000000062001322244523500354560ustar00rootroot00000000000000java-design-patterns-1.18.0/double-dispatch/src/test/java/com/iluwatar/doubledispatch/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.doubledispatch; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; /** * Date: 12/10/15 - 11:31 PM * * @author Jeroen Meulemeester */ public class SpaceStationMirTest extends CollisionTest { @Override final SpaceStationMir getTestedObject() { return new SpaceStationMir(1, 2, 3, 4); } /** * Test the constructor parameters */ @Test public void testConstructor() { final SpaceStationMir mir = new SpaceStationMir(1, 2, 3, 4); assertEquals(1, mir.getLeft()); assertEquals(2, mir.getTop()); assertEquals(3, mir.getRight()); assertEquals(4, mir.getBottom()); assertFalse(mir.isOnFire()); assertFalse(mir.isDamaged()); assertEquals("SpaceStationMir at [1,2,3,4] damaged=false onFire=false", mir.toString()); } /** * Test what happens we collide with an asteroid */ @Test public void testCollideFlamingAsteroid() { testCollision( new FlamingAsteroid(1, 1, 3, 4), false, true, false, false, "SpaceStationMir hits FlamingAsteroid." ); } /** * Test what happens we collide with an meteoroid */ @Test public void testCollideMeteoroid() { testCollision( new Meteoroid(1, 1, 3, 4), false, false, false, false, "SpaceStationMir hits Meteoroid." ); } /** * Test what happens we collide with ISS */ @Test public void testCollideSpaceStationIss() { testCollision( new SpaceStationIss(1, 1, 3, 4), true, false, false, false, "SpaceStationMir hits SpaceStationIss. SpaceStationIss is damaged!" ); } /** * Test what happens we collide with MIR */ @Test public void testCollideSpaceStationMir() { testCollision( new SpaceStationMir(1, 1, 3, 4), true, false, false, false, "SpaceStationMir hits SpaceStationMir. SpaceStationMir is damaged!" ); } }java-design-patterns-1.18.0/eip-aggregator/000077500000000000000000000000001322244523500205265ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/README.md000066400000000000000000000020611322244523500220040ustar00rootroot00000000000000--- layout: pattern title: EIP Aggregator folder: eip-aggregator permalink: /patterns/eip-aggregator/ categories: Integration tags: - Java - Difficulty-Intermittent - EIP --- ## Intent Sometimes in enterprise systems there is a need to group incoming data in order to process it as a whole. For example you may need to gather offers and after defined number of offers has been received you would like to choose the one with the best parameters. Aggregator allows you to merge messages based on defined criteria and parameters. It gathers original messages, applies aggregation strategy and upon fulfilling given criteria, releasing merged messages. ![alt text](./etc/aggregator.gif "Splitter") ## Applicability Use the Aggregator pattern when * You need to combine multiple incoming messages * You want to process grouped data ## Credits * [Gregor Hohpe, Bobby Woolf - Enterprise Integration Patterns](http://www.enterpriseintegrationpatterns.com/patterns/messaging/Aggregator.html) * [Apache Camel - Documentation](http://camel.apache.org/aggregator2.html) java-design-patterns-1.18.0/eip-aggregator/etc/000077500000000000000000000000001322244523500213015ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/etc/aggregator.gif000066400000000000000000000045551322244523500241230ustar00rootroot00000000000000GIF89af333333!,I8ͻ`(dihlp,tm8z{pH,vdgl:Шt9(KvzU.*3oAZ뎹8)WPaBWE S†&V&3ÎNָhMFTg#L.cJ)"GyRpgʸӏ΁6VU^ЧԊ3Y:Ƕ۷p¥˯ ѮQ+jY ~~KÂcbj}<"2k̹ϠCMӻvFbdW)+M۟PֱϩSlȓ+׬ 0H ;]1/]ts?u#)яG{|S1ԯ>Ԝ|^^Mk B! 㞀F`6u8^^\3C-ӄU!rvTa!5$v4@'zWnD*ٞr3H#9B~⢊0iIʸs=>d&WHVْd"#J9ebnF&MڤeQz9mv%x 'lf+v=2Hy '}' **u`CjJwPu`j*k ay4ԧh kAy+k;jH[iF,;LЮɢzгIp@mQj8{=jKʞIB-o31뮳p󖘏y'n^J&0{{H*tܲ+Oк /+ &<(1n׮ "r6ac1Kp C4VMbık; |2dr^OM2VdM[s6hab;ވJrlE2Sv8]3WXfSY8zeyԏ+jk+¹o^7֡3^CzNH8gt_n4}~<:s{f/' iv~ѽ9c=<#Aw6n}#׫m{>&uzeBAS͆0}M6rfS^t e0 <3. A#$LE|P@X3aBvå-P!V%IH)Q}bE(YK&|gDF;p<#SG6QPyGg TH;1ux#ꊸF䐹 )'Kf$8O~f$%(0R$HG%ei)Zi`b.K^ֆpX8LҘ[5E6sń|YI[3b31nՄ3$ĸ44N\̧>"U¼g-^GЂ+@jІ:T3{: ZMh)C>Q'́l5Rr i@\@R2(EJ)NI)xӁrMeFT<5O MMO ~0Bfʨb`EjVJ֝f-Xըzo][ֹUjjhR5%OsgmaUث=bƖUDX'ļ.,Q"V&Kʪֳ jYJ}*mYܾvDi;[~Up"*,q!kB7ypmZWn7HwzZ^bmelbw, _b(MD\%d7-KE.İ4z]CaF2.xq%^@TmecSޗWk˦}*[1RH1kSis+R=m RFZ*YiEomלFZ)̔J'O&q{ :7, m7\+Z smceGyzY [d9CY-r{ $n [WUZr7=t S-{XVwOc Jl[N7QWyKq-w#%딻<_Nsyʋmjt'sHOҗ;Pԧn;java-design-patterns-1.18.0/eip-aggregator/pom.xml000066400000000000000000000061451322244523500220510ustar00rootroot00000000000000 4.0.0 eip-aggregator com.iluwatar java-design-patterns 1.18.0 org.springframework.boot spring-boot-starter-web org.apache.camel camel-core ${camel.version} org.apache.camel camel-spring-boot ${camel.version} com.github.sbrannen spring-test-junit5 test org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.springframework.boot spring-boot-starter-test org.apache.camel camel-test-spring ${camel.version} java-design-patterns-1.18.0/eip-aggregator/src/000077500000000000000000000000001322244523500213155ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/src/main/000077500000000000000000000000001322244523500222415ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/src/main/java/000077500000000000000000000000001322244523500231625ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/src/main/java/com/000077500000000000000000000000001322244523500237405ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500255705ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/src/main/java/com/iluwatar/eip/000077500000000000000000000000001322244523500263455ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/src/main/java/com/iluwatar/eip/aggregator/000077500000000000000000000000001322244523500304675ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/src/main/java/com/iluwatar/eip/aggregator/App.java000066400000000000000000000057501322244523500320610ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eip.aggregator; import org.apache.camel.CamelContext; import org.apache.camel.builder.RouteBuilder; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.ConfigurableApplicationContext; /** * Sometimes in enterprise systems there is a need to group incoming data in order to process it as a whole. For example * you may need to gather offers and after defined number of offers has been received you would like to choose the one * with the best parameters. * *

* Aggregator allows you to merge messages based on defined criteria and parameters. It gathers original messages, * applies aggregation strategy and upon fulfilling given criteria, releasing merged messages. *

* */ @SpringBootApplication public class App { /** * Program entry point. It starts Spring Boot application and using Apache Camel it auto-configures routes. * * @param args command line args */ public static void main(String[] args) throws Exception { // Run Spring Boot application and obtain ApplicationContext ConfigurableApplicationContext context = SpringApplication.run(App.class, args); // Get CamelContext from ApplicationContext CamelContext camelContext = (CamelContext) context.getBean("camelContext"); // Add a new routes that will handle endpoints form SplitterRoute class. camelContext.addRoutes(new RouteBuilder() { @Override public void configure() throws Exception { from("{{endpoint}}").log("ENDPOINT: ${body}"); } }); // Add producer that will send test message to an entry point in WireTapRoute String[] stringArray = {"Test item #1", "Test item #2", "Test item #3"}; camelContext.createProducerTemplate().sendBody("{{entry}}", stringArray); SpringApplication.exit(context); } } java-design-patterns-1.18.0/eip-aggregator/src/main/java/com/iluwatar/eip/aggregator/routes/000077500000000000000000000000001322244523500320105ustar00rootroot00000000000000AggregatorRoute.java000066400000000000000000000044761322244523500357100ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/src/main/java/com/iluwatar/eip/aggregator/routes/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eip.aggregator.routes; import org.apache.camel.builder.RouteBuilder; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; /** * Sample aggregator route definition. * *

* It consumes messages out of the direct:entry entry point and forwards them to direct:endpoint. * Route accepts messages containing String as a body, it aggregates the messages based on the settings and forwards * them as CSV to the output chanel. * * Settings for the aggregation are: aggregate until 3 messages are bundled or wait 2000ms before sending bundled * messages further. *

* * In this example input/output endpoints names are stored in application.properties file. */ @Component public class AggregatorRoute extends RouteBuilder { @Autowired private MessageAggregationStrategy aggregator; /** * Configures the route * @throws Exception in case of exception during configuration */ @Override public void configure() throws Exception { // Main route from("{{entry}}").aggregate(constant(true), aggregator) .completionSize(3).completionInterval(2000) .to("{{endpoint}}"); } } MessageAggregationStrategy.java000066400000000000000000000035741322244523500400640ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/src/main/java/com/iluwatar/eip/aggregator/routes/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eip.aggregator.routes; import org.apache.camel.Exchange; import org.apache.camel.processor.aggregate.AggregationStrategy; import org.springframework.stereotype.Component; /** * Aggregation strategy joining bodies of messages. If message is first one oldMessage is null. All changes are * made on IN messages. */ @Component public class MessageAggregationStrategy implements AggregationStrategy { @Override public Exchange aggregate(Exchange oldExchange, Exchange newExchange) { if (oldExchange == null) { return newExchange; } String in1 = (String) oldExchange.getIn().getBody(); String in2 = (String) newExchange.getIn().getBody(); oldExchange.getIn().setBody(in1 + ";" + in2); return oldExchange; } } java-design-patterns-1.18.0/eip-aggregator/src/main/resources/000077500000000000000000000000001322244523500242535ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/src/main/resources/application.properties000066400000000000000000000022111322244523500306700ustar00rootroot00000000000000# # The MIT License # Copyright (c) 2014 Ilkka Seppälä # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. # entry=direct:entry endpoint=direct:endpoint java-design-patterns-1.18.0/eip-aggregator/src/test/000077500000000000000000000000001322244523500222745ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/src/test/java/000077500000000000000000000000001322244523500232155ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/src/test/java/com/000077500000000000000000000000001322244523500237735ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500256235ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/src/test/java/com/iluwatar/eip/000077500000000000000000000000001322244523500264005ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/src/test/java/com/iluwatar/eip/aggregator/000077500000000000000000000000001322244523500305225ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/src/test/java/com/iluwatar/eip/aggregator/AppTest.java000066400000000000000000000025321322244523500327470ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eip.aggregator; import org.junit.jupiter.api.Test; /** * Test for App class */ public class AppTest { @Test public void testMain() throws Exception { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/eip-aggregator/src/test/java/com/iluwatar/eip/aggregator/routes/000077500000000000000000000000001322244523500320435ustar00rootroot00000000000000AggregatorRouteTest.java000066400000000000000000000062741322244523500366010ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/src/test/java/com/iluwatar/eip/aggregator/routes/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eip.aggregator.routes; import org.apache.camel.EndpointInject; import org.apache.camel.ProducerTemplate; import org.apache.camel.component.mock.MockEndpoint; import org.junit.jupiter.api.Test; import org.junit.jupiter.api.extension.ExtendWith; import org.springframework.boot.autoconfigure.EnableAutoConfiguration; import org.springframework.boot.test.SpringApplicationConfiguration; import org.springframework.context.annotation.ComponentScan; import org.springframework.test.annotation.DirtiesContext; import org.springframework.test.context.ActiveProfiles; import org.springframework.test.context.junit.jupiter.SpringExtension; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Test class for AggregatorRoute. *

* In order for it to work we have to mock endpoints we want to read/write to. To mock those we need to substitute * original endpoint names to mocks. *

*/ @ExtendWith(SpringExtension.class) @SpringApplicationConfiguration(classes = AggregatorRouteTest.class) @ActiveProfiles("test") @EnableAutoConfiguration @ComponentScan public class AggregatorRouteTest { @EndpointInject(uri = "{{entry}}") private ProducerTemplate entry; @EndpointInject(uri = "{{endpoint}}") private MockEndpoint endpoint; /** * Test if endpoint receives three separate messages. * @throws Exception in case of en exception during the test */ @Test @DirtiesContext public void testSplitter() throws Exception { // Three items in one entry message entry.sendBody("TEST1"); entry.sendBody("TEST2"); entry.sendBody("TEST3"); entry.sendBody("TEST4"); entry.sendBody("TEST5"); // Endpoint should have three different messages in the end order of the messages is not important endpoint.expectedMessageCount(2); endpoint.assertIsSatisfied(); String body = (String) endpoint.getReceivedExchanges().get(0).getIn().getBody(); assertEquals(3, body.split(";").length); String body2 = (String) endpoint.getReceivedExchanges().get(1).getIn().getBody(); assertEquals(2, body2.split(";").length); } } MessageAggregationStrategyTest.java000066400000000000000000000045761322244523500407620ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/src/test/java/com/iluwatar/eip/aggregator/routes/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eip.aggregator.routes; import org.apache.camel.CamelContext; import org.apache.camel.Exchange; import org.apache.camel.impl.DefaultExchange; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Tests MessageAggregationStrategy */ public class MessageAggregationStrategyTest { @Test public void testAggregate() { MessageAggregationStrategy mas = new MessageAggregationStrategy(); Exchange oldExchange = new DefaultExchange((CamelContext) null); oldExchange.getIn().setBody("TEST1"); Exchange newExchange = new DefaultExchange((CamelContext) null); newExchange.getIn().setBody("TEST2"); Exchange output = mas.aggregate(oldExchange, newExchange); String outputBody = (String) output.getIn().getBody(); assertEquals("TEST1;TEST2", outputBody); } @Test public void testAggregateOldNull() { MessageAggregationStrategy mas = new MessageAggregationStrategy(); Exchange newExchange = new DefaultExchange((CamelContext) null); newExchange.getIn().setBody("TEST2"); Exchange output = mas.aggregate(null, newExchange); String outputBody = (String) output.getIn().getBody(); assertEquals(newExchange, output); assertEquals("TEST2", outputBody); } } java-design-patterns-1.18.0/eip-aggregator/src/test/resources/000077500000000000000000000000001322244523500243065ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-aggregator/src/test/resources/application-test.properties000066400000000000000000000022071322244523500317050ustar00rootroot00000000000000# # The MIT License # Copyright (c) 2014 Ilkka Seppälä # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. # entry=direct:entry endpoint=mock:endpoint java-design-patterns-1.18.0/eip-splitter/000077500000000000000000000000001322244523500202525ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-splitter/README.md000066400000000000000000000021521322244523500215310ustar00rootroot00000000000000--- layout: pattern title: EIP Splitter folder: eip-splitter permalink: /patterns/eip-splitter/ categories: Integration tags: - Java - Difficulty-Intermittent - EIP --- ## Intent It is very common in integration systems that incoming messages consists of many items bundled together. For example an invoice document contains multiple invoice lines describing transaction (quantity, name of provided service/sold goods, price etc.). Such bundled messages may not be accepted by other systems. This is where splitter pattern comes in handy. It will take the whole document, split it based on given criteria and send individual items to the endpoint. ![alt text](./etc/sequencer.gif "Splitter") ## Applicability Use the Splitter pattern when * You need to split received data into smaller pieces to process them individually * You need to control the size of data batches you are able to process ## Credits * [Gregor Hohpe, Bobby Woolf - Enterprise Integration Patterns](http://www.enterpriseintegrationpatterns.com/patterns/messaging/Sequencer.html) * [Apache Camel - Documentation](http://camel.apache.org/splitter.html) java-design-patterns-1.18.0/eip-splitter/etc/000077500000000000000000000000001322244523500210255ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-splitter/etc/sequencer.gif000066400000000000000000000043721322244523500235140ustar00rootroot00000000000000GIF89a~f333333!,~I8ͻ`(dihl!pmx|$a8Ȥrl:mZجvۉNxL.nN&~Gv}Lw'urkYR>0þBʴ3Fж՘څߡzVG7O`xWp A*x!ć%RE5ridž$ɔa\ٲ0:I @ JtMq@sS]ѧPJmŞp RT@ٳhӪ]˶|| Bn,* N(#붰Èʍ;Ilc'XXp3klvqD om=EE жA>՗a ^Vv(ݸ6=by_}3Wޚu9ۓt$O]wߟ'M=c^MuQz o 6@؝wJz "v BYۆ"v Ȗ"/6.}, 2Es9ۍ1)"1Xi%$VNأ}$~ccBs[r$A5duHWAvD#`>iK$A&ZgM[U5ƣPh:.Rz襤Ζg.*(N B͕Z)@Z&Hg3f){M[B=֒E̮` @Ʒ]P{f+Qv.(o񋻩ڂu{ 7찱~v6a"'Aӊ @鼋,۱l6[Tqwq8s OsQ>shL/#P~P;mc_l\kj]6Emk73W}yjDH0ʅi/n&CcLuSR! :7ϸڐ; Wp2!\OM=t;ٱl>w`в੡^:}SU"z} "NT_54IP|p?q[P >qc}]`L5@zq6XaҩcrȾˆ\B W萇{_X@3 F4BFtE|2cwPvV,b;:1OyA܏Y iCgԣ%=ҍr,x2K Yp6Mmn`_d Z*Gq*Yy.&!#"wK!_@,l#2\Ѓд1YjSل6 o c8&Mr߼TIyӝH9ȚzB'>yGt!g@1}b .}FFlXԚfHx,hHQr-ml)Ӛ8ͩNw``U0tjԾG)<\jTU݁(*f<|ak>Ҫ!pnl+Sajuh^P'Ux5+\kS]yQX5-+`Ufʭ,dXղ|WO,`J }lbr6תjNPEWt v=MjU+5mX֊r[[(R=XZ.Mh[];y\2oc^rHktCK`r߻VE0bKWN0alY5>nZ  (F"73Np c7|[/1$W!q|;>=Vqn%@ָ}v)%löʲ֦rY)eYxW2)ϖZ߰)n^ Li6C#E]fAQf4U*GJOoBa}bq}jռW$ZdeZNV]DisZ֪C#Dbڼ.\JךᎷMzη~j;java-design-patterns-1.18.0/eip-splitter/pom.xml000066400000000000000000000061431322244523500215730ustar00rootroot00000000000000 4.0.0 eip-splitter com.iluwatar java-design-patterns 1.18.0 org.springframework.boot spring-boot-starter-web org.apache.camel camel-core ${camel.version} org.apache.camel camel-spring-boot ${camel.version} com.github.sbrannen spring-test-junit5 test org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.springframework.boot spring-boot-starter-test org.apache.camel camel-test-spring ${camel.version} java-design-patterns-1.18.0/eip-splitter/src/000077500000000000000000000000001322244523500210415ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-splitter/src/main/000077500000000000000000000000001322244523500217655ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-splitter/src/main/java/000077500000000000000000000000001322244523500227065ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-splitter/src/main/java/com/000077500000000000000000000000001322244523500234645ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-splitter/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500253145ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-splitter/src/main/java/com/iluwatar/eip/000077500000000000000000000000001322244523500260715ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-splitter/src/main/java/com/iluwatar/eip/splitter/000077500000000000000000000000001322244523500277375ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-splitter/src/main/java/com/iluwatar/eip/splitter/App.java000066400000000000000000000063061322244523500313270ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eip.splitter; import org.apache.camel.CamelContext; import org.apache.camel.builder.RouteBuilder; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.ConfigurableApplicationContext; /** * It is very common in integration systems that incoming messages consists of many items bundled together. For example * an invoice document contains multiple invoice lines describing transaction (quantity, name of provided * service/sold goods, price etc.). Such bundled messages may not be accepted by other systems. This is where splitter * pattern comes in handy. It will take the whole document, split it based on given criteria and send individual * items to the endpoint. * *

* Splitter allows you to split messages based on defined criteria. It takes original message, process it and send * multiple parts to the output channel. It is not defined if it should keep the order of items though. *

* */ @SpringBootApplication public class App { /** * Program entry point. It starts Spring Boot application and using Apache Camel it auto-configures routes. * * @param args command line args */ public static void main(String[] args) throws Exception { // Run Spring Boot application and obtain ApplicationContext ConfigurableApplicationContext context = SpringApplication.run(App.class, args); // Get CamelContext from ApplicationContext CamelContext camelContext = (CamelContext) context.getBean("camelContext"); // Add a new routes that will handle endpoints form SplitterRoute class. camelContext.addRoutes(new RouteBuilder() { @Override public void configure() throws Exception { from("{{endpoint}}").log("ENDPOINT: ${body}"); } }); // Add producer that will send test message to an entry point in WireTapRoute String[] stringArray = {"Test item #1", "Test item #2", "Test item #3"}; camelContext.createProducerTemplate().sendBody("{{entry}}", stringArray); SpringApplication.exit(context); } } java-design-patterns-1.18.0/eip-splitter/src/main/java/com/iluwatar/eip/splitter/routes/000077500000000000000000000000001322244523500312605ustar00rootroot00000000000000SplitterRoute.java000066400000000000000000000037411322244523500346760ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-splitter/src/main/java/com/iluwatar/eip/splitter/routes/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eip.splitter.routes; import org.apache.camel.builder.RouteBuilder; import org.springframework.stereotype.Component; /** * Sample splitter route definition. * *

* It consumes messages out of the direct:entry entry point and forwards them to direct:endpoint. * Route accepts messages having body of array or collection of objects. Splitter component split message body and * forwards single objects to the endpoint. *

* * In this example input/output endpoints names are stored in application.properties file. */ @Component public class SplitterRoute extends RouteBuilder { /** * Configures the route * @throws Exception in case of exception during configuration */ @Override public void configure() throws Exception { // Main route from("{{entry}}").split().body().to("{{endpoint}}"); } } java-design-patterns-1.18.0/eip-splitter/src/main/resources/000077500000000000000000000000001322244523500237775ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-splitter/src/main/resources/application.properties000066400000000000000000000022111322244523500304140ustar00rootroot00000000000000# # The MIT License # Copyright (c) 2014 Ilkka Seppälä # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. # entry=direct:entry endpoint=direct:endpoint java-design-patterns-1.18.0/eip-splitter/src/test/000077500000000000000000000000001322244523500220205ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-splitter/src/test/java/000077500000000000000000000000001322244523500227415ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-splitter/src/test/java/com/000077500000000000000000000000001322244523500235175ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-splitter/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500253475ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-splitter/src/test/java/com/iluwatar/eip/000077500000000000000000000000001322244523500261245ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-splitter/src/test/java/com/iluwatar/eip/splitter/000077500000000000000000000000001322244523500277725ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-splitter/src/test/java/com/iluwatar/eip/splitter/AppTest.java000066400000000000000000000025301322244523500322150ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eip.splitter; import org.junit.jupiter.api.Test; /** * Test for App class */ public class AppTest { @Test public void testMain() throws Exception { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/eip-splitter/src/test/java/com/iluwatar/eip/splitter/routes/000077500000000000000000000000001322244523500313135ustar00rootroot00000000000000SplitterRouteTest.java000066400000000000000000000054331322244523500355710ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-splitter/src/test/java/com/iluwatar/eip/splitter/routes/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eip.splitter.routes; import org.apache.camel.EndpointInject; import org.apache.camel.ProducerTemplate; import org.apache.camel.component.mock.MockEndpoint; import org.junit.jupiter.api.Test; import org.junit.jupiter.api.extension.ExtendWith; import org.springframework.boot.autoconfigure.EnableAutoConfiguration; import org.springframework.boot.test.SpringApplicationConfiguration; import org.springframework.context.annotation.ComponentScan; import org.springframework.test.annotation.DirtiesContext; import org.springframework.test.context.ActiveProfiles; import org.springframework.test.context.junit.jupiter.SpringExtension; /** * Test class for SplitterRoute. *

* In order for it to work we have to mock endpoints we want to read/write to. To mock those we need to substitute * original endpoint names to mocks. *

*/ @ExtendWith(SpringExtension.class) @SpringApplicationConfiguration(classes = SplitterRouteTest.class) @ActiveProfiles("test") @EnableAutoConfiguration @ComponentScan public class SplitterRouteTest { @EndpointInject(uri = "{{entry}}") private ProducerTemplate entry; @EndpointInject(uri = "{{endpoint}}") private MockEndpoint endpoint; /** * Test if endpoint receives three separate messages. * @throws Exception in case of en exception during the test */ @Test @DirtiesContext public void testSplitter() throws Exception { // Three items in one entry message entry.sendBody(new String[] {"TEST1", "TEST2", "TEST3"}); // Endpoint should have three different messages in the end order of the messages is not important endpoint.expectedMessageCount(3); endpoint.assertIsSatisfied(); } } java-design-patterns-1.18.0/eip-splitter/src/test/resources/000077500000000000000000000000001322244523500240325ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-splitter/src/test/resources/application-test.properties000066400000000000000000000022071322244523500314310ustar00rootroot00000000000000# # The MIT License # Copyright (c) 2014 Ilkka Seppälä # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. # entry=direct:entry endpoint=mock:endpoint java-design-patterns-1.18.0/eip-wire-tap/000077500000000000000000000000001322244523500201345ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-wire-tap/README.md000066400000000000000000000017341322244523500214200ustar00rootroot00000000000000--- layout: pattern title: EIP Wire Tap folder: eip-wire-tap permalink: /patterns/eip-wire-tap/ categories: Integration tags: - Java - Difficulty-Intermittent - EIP --- ## Intent In most integration cases there is a need to monitor the messages flowing through the system. It is usually achieved by intercepting the message and redirecting it to a different location like console, filesystem or the database. It is important that such functionality should not modify the original message and influence the processing path. ![alt text](./etc/wiretap.gif "Wire Tap") ## Applicability Use the Wire Tap pattern when * You need to monitor messages flowing through the system * You need to redirect the same, unchanged message to two different endpoints/paths ## Credits * [Gregor Hohpe, Bobby Woolf - Enterprise Integration Patterns](http://www.enterpriseintegrationpatterns.com/patterns/messaging/WireTap.html) * [Apache Camel - Documentation](http://camel.apache.org/wire-tap.html) java-design-patterns-1.18.0/eip-wire-tap/etc/000077500000000000000000000000001322244523500207075ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-wire-tap/etc/wiretap.gif000066400000000000000000000057731322244523500230650ustar00rootroot00000000000000GIF89a׹̲߆|usiarV|||sssfLfffZpCZZZM`:QQQJJJBBB:H+<<<3@&333-8"***!!!   !1,@pH,Ȥrl:ШtJZجvzxL.zn|N~]0EDN0UBQ|ŻŦIC[ơ۠PG҅cݺ֚ߴITH"'cgdY6pCoɓJ\ʖ0cʜI͛8sɳ@ JѣH*]ʴӧPGիXjuc`Ê+nٳh>K˶m[n}jݻVEхd@_aLÈ+^̸q߿Ӵ]dW00`ϠC'6˚Ho9tgѰc&ڴ0ԙj;μGqc[3}q/MO<ہeze_ʫrO7/4H~'' c"V\9 a% wfHuHq؜Fʄ G&a"*."/:3"Rv7NfDiH&KZE9#C2iX^d/=#yABQ !l`hl `eMYĘe矀u>$_#TF*餔Vj饔6 A .^7׬#e:'Adz#R9 .$8@R(L ->+m0~p3p (v:\eHL&:N.-1ʜ .z` #R /tC6RӨ,/v$c;-!;uА6 QG{$'TbW# ŵI脈љ׌aIKf9xF >yIL.kD/=t0 JYdӠ׀~xzԟ. G]jjzհ#jXB35Tp^/׾Q-bdG̎6MM$eK3q6nQmnY ]<*i",= ,(!`u l`'' ! *,q7` xDrM<TU_&GInO1_y;'xʉn':ӧn+} au/=[{.\hهk7>ct;.u= |gOoa/{ K}@/җ9zMzѡ>lg|YO/;m?^/|?>''<=D T`7~ @p|08AgV6 |PlhtM%o' PGb phzր7W8|ƷxV$mEbn$x!#g.x6Wn6yꖃw2ȃSf@rB8"'_]VF8qH(UքPRTXOqZ\^dfcQXaN؆nhp8r8[XXxxz؅|؇K88vtȈ@hX=q8Bቤ(B?Ҋxafx\Jы6kSkŸ0;java-design-patterns-1.18.0/eip-wire-tap/pom.xml000066400000000000000000000061431322244523500214550ustar00rootroot00000000000000 4.0.0 eip-wire-tap com.iluwatar java-design-patterns 1.18.0 org.springframework.boot spring-boot-starter-web org.apache.camel camel-core ${camel.version} org.apache.camel camel-spring-boot ${camel.version} com.github.sbrannen spring-test-junit5 test org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.springframework.boot spring-boot-starter-test org.apache.camel camel-test-spring ${camel.version} java-design-patterns-1.18.0/eip-wire-tap/src/000077500000000000000000000000001322244523500207235ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-wire-tap/src/main/000077500000000000000000000000001322244523500216475ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-wire-tap/src/main/java/000077500000000000000000000000001322244523500225705ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-wire-tap/src/main/java/com/000077500000000000000000000000001322244523500233465ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-wire-tap/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500251765ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-wire-tap/src/main/java/com/iluwatar/eip/000077500000000000000000000000001322244523500257535ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-wire-tap/src/main/java/com/iluwatar/eip/wiretap/000077500000000000000000000000001322244523500274265ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-wire-tap/src/main/java/com/iluwatar/eip/wiretap/App.java000066400000000000000000000061261322244523500310160ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eip.wiretap; import org.apache.camel.CamelContext; import org.apache.camel.builder.RouteBuilder; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.ConfigurableApplicationContext; /** * In most integration cases there is a need to monitor the messages flowing through the system. It is usually achieved * by intercepting the message and redirecting it to a different location like console, filesystem or the database. * It is important that such functionality should not modify the original message and influence the processing path. * *

* Wire Tap allows you to route messages to a separate location while they are being forwarded to the ultimate * destination. It basically consumes messages of the input channel and publishes the unmodified message to both * output channels. *

*/ @SpringBootApplication public class App { /** * Program entry point. It starts Spring Boot application and using Apache Camel it auto-configures routes. * * @param args command line args */ public static void main(String[] args) throws Exception { // Run Spring Boot application and obtain ApplicationContext ConfigurableApplicationContext context = SpringApplication.run(App.class, args); // Get CamelContext from ApplicationContext CamelContext camelContext = (CamelContext) context.getBean("camelContext"); // Add a new routes that will handle endpoints form WireTapRoute class. camelContext.addRoutes(new RouteBuilder() { @Override public void configure() throws Exception { from("{{endpoint}}").log("ENDPOINT: ${body}"); from("{{wireTapEndpoint}}").log("WIRETAPPED ENDPOINT: ${body}"); } }); // Add producer that will send test message to an entry point in WireTapRoute camelContext.createProducerTemplate().sendBody("{{entry}}", "Test message"); SpringApplication.exit(context); } } java-design-patterns-1.18.0/eip-wire-tap/src/main/java/com/iluwatar/eip/wiretap/routes/000077500000000000000000000000001322244523500307475ustar00rootroot00000000000000WireTapRoute.java000066400000000000000000000040711322244523500341270ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-wire-tap/src/main/java/com/iluwatar/eip/wiretap/routes/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eip.wiretap.routes; import org.apache.camel.builder.RouteBuilder; import org.springframework.stereotype.Component; /** * Sample wire tap route definition. * *

* It consumes messages out of the direct:entry entry point and forwards them to direct:endpoint. * Wire Tap intercepts the message and sends it to direct:wireTap, which in turn forwards it to * direct:wireTapEndpoint. *

* * In this example input/output endpoints names are stored in application.properties file. */ @Component public class WireTapRoute extends RouteBuilder { /** * Configures the route * @throws Exception in case of exception during configuration */ @Override public void configure() throws Exception { // Main route from("{{entry}}").wireTap("direct:wireTap").to("{{endpoint}}"); // Wire tap route from("direct:wireTap").log("Message: ${body}").to("{{wireTapEndpoint}}"); } } java-design-patterns-1.18.0/eip-wire-tap/src/main/resources/000077500000000000000000000000001322244523500236615ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-wire-tap/src/main/resources/application.properties000066400000000000000000000022571322244523500303100ustar00rootroot00000000000000# # The MIT License # Copyright (c) 2014 Ilkka Seppälä # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. # entry=direct:entry endpoint=direct:endpoint wireTapEndpoint=direct:wireTapEndpointjava-design-patterns-1.18.0/eip-wire-tap/src/test/000077500000000000000000000000001322244523500217025ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-wire-tap/src/test/java/000077500000000000000000000000001322244523500226235ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-wire-tap/src/test/java/com/000077500000000000000000000000001322244523500234015ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-wire-tap/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500252315ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-wire-tap/src/test/java/com/iluwatar/eip/000077500000000000000000000000001322244523500260065ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-wire-tap/src/test/java/com/iluwatar/eip/wiretap/000077500000000000000000000000001322244523500274615ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-wire-tap/src/test/java/com/iluwatar/eip/wiretap/AppTest.java000066400000000000000000000025271322244523500317120ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eip.wiretap; import org.junit.jupiter.api.Test; /** * Test for App class */ public class AppTest { @Test public void testMain() throws Exception { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/eip-wire-tap/src/test/java/com/iluwatar/eip/wiretap/routes/000077500000000000000000000000001322244523500310025ustar00rootroot00000000000000WireTapRouteTest.java000066400000000000000000000062201322244523500350200ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-wire-tap/src/test/java/com/iluwatar/eip/wiretap/routes/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eip.wiretap.routes; import org.apache.camel.EndpointInject; import org.apache.camel.Message; import org.apache.camel.ProducerTemplate; import org.apache.camel.component.mock.MockEndpoint; import org.junit.jupiter.api.Test; import org.junit.jupiter.api.extension.ExtendWith; import org.springframework.boot.autoconfigure.EnableAutoConfiguration; import org.springframework.boot.test.SpringApplicationConfiguration; import org.springframework.context.annotation.ComponentScan; import org.springframework.test.annotation.DirtiesContext; import org.springframework.test.context.ActiveProfiles; import org.springframework.test.context.junit.jupiter.SpringExtension; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Test class for WireTapRoute. *

* In order for it to work we have to mock endpoints we want to read/write to. To mock those we need to substitute * original endpoint names to mocks. *

*/ @ExtendWith(SpringExtension.class) @SpringApplicationConfiguration(classes = WireTapRouteTest.class) @ActiveProfiles("test") @EnableAutoConfiguration @ComponentScan public class WireTapRouteTest { @EndpointInject(uri = "{{entry}}") private ProducerTemplate entry; @EndpointInject(uri = "{{endpoint}}") private MockEndpoint endpoint; @EndpointInject(uri = "{{wireTapEndpoint}}") private MockEndpoint wireTapEndpoint; /** * Test if both endpoints receive exactly one message containing the same, unchanged body. * @throws Exception in case of en exception during the test */ @Test @DirtiesContext public void testWireTap() throws Exception { entry.sendBody("TEST"); endpoint.expectedMessageCount(1); wireTapEndpoint.expectedMessageCount(1); endpoint.assertIsSatisfied(); wireTapEndpoint.assertIsSatisfied(); Message endpointIn = endpoint.getExchanges().get(0).getIn(); Message wireTapEndpointIn = wireTapEndpoint.getExchanges().get(0).getIn(); assertEquals("TEST", endpointIn.getBody()); assertEquals("TEST", wireTapEndpointIn.getBody()); } } java-design-patterns-1.18.0/eip-wire-tap/src/test/resources/000077500000000000000000000000001322244523500237145ustar00rootroot00000000000000java-design-patterns-1.18.0/eip-wire-tap/src/test/resources/application-test.properties000066400000000000000000000022531322244523500313140ustar00rootroot00000000000000# # The MIT License # Copyright (c) 2014 Ilkka Seppälä # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. # entry=direct:entry endpoint=mock:endpoint wireTapEndpoint=mock:wireTapEndpointjava-design-patterns-1.18.0/event-aggregator/000077500000000000000000000000001322244523500210725ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/README.md000066400000000000000000000022561322244523500223560ustar00rootroot00000000000000--- layout: pattern title: Event Aggregator folder: event-aggregator permalink: /patterns/event-aggregator/ categories: Structural tags: - Java - Difficulty-Beginner - Reactive --- ## Intent A system with lots of objects can lead to complexities when a client wants to subscribe to events. The client has to find and register for each object individually, if each object has multiple events then each event requires a separate subscription. An Event Aggregator acts as a single source of events for many objects. It registers for all the events of the many objects allowing clients to register with just the aggregator. ![alt text](./etc/classes.png "Event Aggregator") ## Applicability Use the Event Aggregator pattern when * Event Aggregator is a good choice when you have lots of objects that are potential event sources. Rather than have the observer deal with registering with them all, you can centralize the registration logic to the Event Aggregator. As well as simplifying registration, a Event Aggregator also simplifies the memory management issues in using observers. ## Credits * [Martin Fowler - Event Aggregator](http://martinfowler.com/eaaDev/EventAggregator.html) java-design-patterns-1.18.0/event-aggregator/etc/000077500000000000000000000000001322244523500216455ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/etc/classes.png000066400000000000000000001311071322244523500240130ustar00rootroot00000000000000PNG  IHDR&6IDATx}-Wu'!HH7G0pF#Hnrpdc`7=y Ǹlچ} '=cۘ S>.ѼLmf4HQHNթ]uN}]?Ԫ޵jשVU{avh2rP"+A`[+hR[,Pwxr2 AoG Wj Npsf !`Bg+})5B<zYJaga_ a=o6^-t;RXYؗBXs) Wj Npjk~ڙZy6ŝͻ./)6Pg'fbϪ|w yLp!f16}NGԶ:;1 WAa׉ZJaga_ CSg({&f//ЩVNU@Զ>:;1-)`;%tﰸ 5H+})m͇6k*4RYYC6r6.2Bl]NoWlEˣW o0:n'*QK__nQ65)ݠ0@S+NLuqdX4RYCpprk>J!#)f CEx$‘V{}q }a>5썿کUkԄc` p}N5B*WjNL`Th\J^),,K\)47V]adGFarsT3|D`ϯlZޑM0j@S+uWg'#ʞ)PD ugXz/z9祝0䗰_Gw tXR]"_3*KqG(N/ЩFTJmى邲gLR$Nd e!J^),,Kankh=xӽ~h7uf1bEVw~}UGf @S+NLʮ藈J.PMQo| ~sϳodǘ nw!B!G3r"R{>>G  %tbs]ҿ+})tʚoӵw cҧ_}wGl?Є%a!겝ł1b]їh(%Z<Ǟѵ\2BtƐc}o$EBu'L~mtmܴy8;!'}bPpWҁV~XeB͢7TxfYyK$g X*Z氐Nn!W 8 R&?z7=z??~6H~wp/P%cX ͜8J,oX'* (kg˕-Sl}3N Dd$F_F\&8[UW[YXBtƐCHf#t]+SQ Jmo۸?Kt;]_\|~sc$)ӕ+U|wYdžz^<7Kpj_+U+})tʚ?z?skCN}⟮3,g>vЄ164]QVOLBYLȭJB#?)wc*]Xfе(QDRtun}'?;z;zn񓓟6g)c>.t!wԫ3z++$f+})tʚ?;_ț>qoOޞn/;Z7ipaWl GG eȡI$v|7LSTqce FJm+>zݻ?0?gR~G}}in G\ON+z#oJ^),,KSG{z^ny`cL֨w1TK4jXlo)wc*]U_r[bl&Jmgk>}/}? 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.aggregator; import java.util.ArrayList; import java.util.List; /** * * A system with lots of objects can lead to complexities when a client wants to subscribe to * events. The client has to find and register for each object individually, if each object has * multiple events then each event requires a separate subscription. *

* An Event Aggregator acts as a single source of events for many objects. It registers for all the * events of the many objects allowing clients to register with just the aggregator. *

* In the example {@link LordBaelish}, {@link LordVarys} and {@link Scout} deliver events to * {@link KingsHand}. {@link KingsHand}, the event aggregator, then delivers the events to * {@link KingJoffrey}. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { KingJoffrey kingJoffrey = new KingJoffrey(); KingsHand kingsHand = new KingsHand(kingJoffrey); List emitters = new ArrayList<>(); emitters.add(kingsHand); emitters.add(new LordBaelish(kingsHand)); emitters.add(new LordVarys(kingsHand)); emitters.add(new Scout(kingsHand)); for (Weekday day : Weekday.values()) { for (EventEmitter emitter : emitters) { emitter.timePasses(day); } } } } java-design-patterns-1.18.0/event-aggregator/src/main/java/com/iluwatar/event/aggregator/Event.java000066400000000000000000000027721322244523500333330ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.aggregator; /** * * Event enumeration. * */ public enum Event { STARK_SIGHTED("Stark sighted"), WARSHIPS_APPROACHING("Warships approaching"), TRAITOR_DETECTED( "Traitor detected"); private String description; Event(String description) { this.description = description; } public String toString() { return description; } } EventEmitter.java000066400000000000000000000034331322244523500346010ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/main/java/com/iluwatar/event/aggregator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.aggregator; import java.util.LinkedList; import java.util.List; /** * * EventEmitter is the base class for event producers that can be observed. * */ public abstract class EventEmitter { private List observers; public EventEmitter() { observers = new LinkedList<>(); } public EventEmitter(EventObserver obs) { this(); registerObserver(obs); } public final void registerObserver(EventObserver obs) { observers.add(obs); } protected void notifyObservers(Event e) { for (EventObserver obs : observers) { obs.onEvent(e); } } public abstract void timePasses(Weekday day); } EventObserver.java000066400000000000000000000024371322244523500347620ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/main/java/com/iluwatar/event/aggregator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.aggregator; /** * * Observers of events implement this interface. * */ public interface EventObserver { void onEvent(Event e); } KingJoffrey.java000066400000000000000000000030471322244523500344040ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/main/java/com/iluwatar/event/aggregator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.aggregator; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * KingJoffrey observes events from {@link KingsHand}. * */ public class KingJoffrey implements EventObserver { private static final Logger LOGGER = LoggerFactory.getLogger(KingJoffrey.class); @Override public void onEvent(Event e) { LOGGER.info("Received event from the King's Hand: {}", e.toString()); } } KingsHand.java000066400000000000000000000031001322244523500340230ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/main/java/com/iluwatar/event/aggregator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.aggregator; /** * * KingsHand observes events from multiple sources and delivers them to listeners. * */ public class KingsHand extends EventEmitter implements EventObserver { public KingsHand() { super(); } public KingsHand(EventObserver obs) { super(obs); } @Override public void onEvent(Event e) { notifyObservers(e); } @Override public void timePasses(Weekday day) { // NOP } } LordBaelish.java000066400000000000000000000027751322244523500343660ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/main/java/com/iluwatar/event/aggregator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.aggregator; /** * * LordBaelish produces events. * */ public class LordBaelish extends EventEmitter { public LordBaelish() { super(); } public LordBaelish(EventObserver obs) { super(obs); } @Override public void timePasses(Weekday day) { if (day.equals(Weekday.FRIDAY)) { notifyObservers(Event.STARK_SIGHTED); } } } LordVarys.java000066400000000000000000000027721322244523500341200ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/main/java/com/iluwatar/event/aggregator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.aggregator; /** * * LordVarys produces events. * */ public class LordVarys extends EventEmitter { public LordVarys() { super(); } public LordVarys(EventObserver obs) { super(obs); } @Override public void timePasses(Weekday day) { if (day.equals(Weekday.SATURDAY)) { notifyObservers(Event.TRAITOR_DETECTED); } } } java-design-patterns-1.18.0/event-aggregator/src/main/java/com/iluwatar/event/aggregator/Scout.java000066400000000000000000000027551322244523500333500ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.aggregator; /** * * Scout produces events. * */ public class Scout extends EventEmitter { public Scout() { super(); } public Scout(EventObserver obs) { super(obs); } @Override public void timePasses(Weekday day) { if (day.equals(Weekday.TUESDAY)) { notifyObservers(Event.WARSHIPS_APPROACHING); } } } Weekday.java000066400000000000000000000030311322244523500335510ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/main/java/com/iluwatar/event/aggregator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.aggregator; /** * * Weekday enumeration * */ public enum Weekday { MONDAY("Monday"), TUESDAY("Tuesday"), WEDNESDAY("Wednesday"), THURSDAY("Thursday"), FRIDAY( "Friday"), SATURDAY("Saturday"), SUNDAY("Sunday"); private String description; Weekday(String description) { this.description = description; } public String toString() { return description; } } java-design-patterns-1.18.0/event-aggregator/src/test/000077500000000000000000000000001322244523500226405ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/test/java/000077500000000000000000000000001322244523500235615ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/test/java/com/000077500000000000000000000000001322244523500243375ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500261675ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/test/java/com/iluwatar/event/000077500000000000000000000000001322244523500273105ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/test/java/com/iluwatar/event/aggregator/000077500000000000000000000000001322244523500314325ustar00rootroot00000000000000AppTest.java000066400000000000000000000025211322244523500335760ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/test/java/com/iluwatar/event/aggregator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.aggregator; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } EventEmitterTest.java000066400000000000000000000135451322244523500355010ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/test/java/com/iluwatar/event/aggregator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.aggregator; import org.junit.jupiter.api.Test; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; import java.util.Objects; import java.util.function.Function; import java.util.function.Supplier; /** * Date: 12/12/15 - 10:58 PM * Tests for Event Emitter * @param Type of Event Emitter * @author Jeroen Meulemeester */ public abstract class EventEmitterTest { /** * Factory used to create a new instance of the test object with a default observer */ private final Function factoryWithDefaultObserver; /** * Factory used to create a new instance of the test object without passing a default observer */ private final Supplier factoryWithoutDefaultObserver; /** * The day of the week an event is expected */ private final Weekday specialDay; /** * The expected event, emitted on the special day */ private final Event event; /** * Create a new event emitter test, using the given test object factories, special day and event */ EventEmitterTest(final Weekday specialDay, final Event event, final Function factoryWithDefaultObserver, final Supplier factoryWithoutDefaultObserver) { this.specialDay = specialDay; this.event = event; this.factoryWithDefaultObserver = Objects.requireNonNull(factoryWithDefaultObserver); this.factoryWithoutDefaultObserver = Objects.requireNonNull(factoryWithoutDefaultObserver); } /** * Go over every day of the month, and check if the event is emitted on the given day. This test * is executed twice, once without a default emitter and once with */ @Test public void testAllDays() { testAllDaysWithoutDefaultObserver(specialDay, event); testAllDaysWithDefaultObserver(specialDay, event); } /** * Pass each week of the day, day by day to the event emitter and verify of the given observers * received the correct event on the special day. * * @param specialDay The special day on which an event is emitted * @param event The expected event emitted by the test object * @param emitter The event emitter * @param observers The registered observer mocks */ private void testAllDays(final Weekday specialDay, final Event event, final E emitter, final EventObserver... observers) { for (final Weekday weekday : Weekday.values()) { // Pass each week of the day, day by day to the event emitter emitter.timePasses(weekday); if (weekday == specialDay) { // On a special day, every observer should have received the event for (final EventObserver observer : observers) { verify(observer, times(1)).onEvent(eq(event)); } } else { // On any other normal day, the observers should have received nothing at all verifyZeroInteractions(observers); } } // The observers should not have received any additional events after the week verifyNoMoreInteractions(observers); } /** * Go over every day of the month, and check if the event is emitted on the given day. Use an * event emitter without a default observer * * @param specialDay The special day on which an event is emitted * @param event The expected event emitted by the test object */ private void testAllDaysWithoutDefaultObserver(final Weekday specialDay, final Event event) { final EventObserver observer1 = mock(EventObserver.class); final EventObserver observer2 = mock(EventObserver.class); final E emitter = this.factoryWithoutDefaultObserver.get(); emitter.registerObserver(observer1); emitter.registerObserver(observer2); testAllDays(specialDay, event, emitter, observer1, observer2); } /** * Go over every day of the month, and check if the event is emitted on the given day. * * @param specialDay The special day on which an event is emitted * @param event The expected event emitted by the test object */ private void testAllDaysWithDefaultObserver(final Weekday specialDay, final Event event) { final EventObserver defaultObserver = mock(EventObserver.class); final EventObserver observer1 = mock(EventObserver.class); final EventObserver observer2 = mock(EventObserver.class); final E emitter = this.factoryWithDefaultObserver.apply(defaultObserver); emitter.registerObserver(observer1); emitter.registerObserver(observer2); testAllDays(specialDay, event, emitter, defaultObserver, observer1, observer2); } } EventTest.java000066400000000000000000000033141322244523500341400ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/test/java/com/iluwatar/event/aggregator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.aggregator; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertNotNull; /** * Date: 12/12/15 - 2:52 PM * * @author Jeroen Meulemeester */ public class EventTest { /** * Verify if every event has a non-null, non-empty description */ @Test public void testToString() { for (final Event event : Event.values()) { final String toString = event.toString(); assertNotNull(toString); assertFalse(toString.trim().isEmpty()); } } }KingJoffreyTest.java000066400000000000000000000056541322244523500353050ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/test/java/com/iluwatar/event/aggregator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.aggregator; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.slf4j.LoggerFactory; import java.util.LinkedList; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Date: 12/12/15 - 3:04 PM * * @author Jeroen Meulemeester */ public class KingJoffreyTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(KingJoffrey.class); } @AfterEach public void tearDown() { appender.stop(); } /** * Test if {@link KingJoffrey} tells us what event he received */ @Test public void testOnEvent() { final KingJoffrey kingJoffrey = new KingJoffrey(); for (int i = 0; i < Event.values().length; ++i) { assertEquals(i, appender.getLogSize()); Event event = Event.values()[i]; kingJoffrey.onEvent(event); final String expectedMessage = "Received event from the King's Hand: " + event.toString(); assertEquals(expectedMessage, appender.getLastMessage()); assertEquals(i + 1, appender.getLogSize()); } } private class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender(Class clazz) { ((Logger) LoggerFactory.getLogger(clazz)).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public String getLastMessage() { return log.get(log.size() - 1).getFormattedMessage(); } public int getLogSize() { return log.size(); } } } KingsHandTest.java000066400000000000000000000050571322244523500347330ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/test/java/com/iluwatar/event/aggregator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.aggregator; import org.junit.jupiter.api.Test; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyZeroInteractions; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/12/15 - 10:57 AM * * @author Jeroen Meulemeester */ public class KingsHandTest extends EventEmitterTest { /** * Create a new test instance, using the correct object factory */ public KingsHandTest() { super(null, null, KingsHand::new, KingsHand::new); } /** * The {@link KingsHand} is both an {@link EventEmitter} as an {@link EventObserver} so verify if every * event received is passed up to it's superior, in most cases {@link KingJoffrey} but now just a * mocked observer. */ @Test public void testPassThrough() throws Exception { final EventObserver observer = mock(EventObserver.class); final KingsHand kingsHand = new KingsHand(observer); // The kings hand should not pass any events before he received one verifyZeroInteractions(observer); // Verify if each event is passed on to the observer, nothing less, nothing more. for (final Event event : Event.values()) { kingsHand.onEvent(event); verify(observer, times(1)).onEvent(eq(event)); verifyNoMoreInteractions(observer); } } }LordBaelishTest.java000066400000000000000000000027631322244523500352560ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/test/java/com/iluwatar/event/aggregator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.aggregator; /** * Date: 12/12/15 - 10:57 AM * * @author Jeroen Meulemeester */ public class LordBaelishTest extends EventEmitterTest { /** * Create a new test instance, using the correct object factory */ public LordBaelishTest() { super(Weekday.FRIDAY, Event.STARK_SIGHTED, LordBaelish::new, LordBaelish::new); } }LordVarysTest.java000066400000000000000000000027561322244523500350150ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/test/java/com/iluwatar/event/aggregator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.aggregator; /** * Date: 12/12/15 - 10:57 AM * * @author Jeroen Meulemeester */ public class LordVarysTest extends EventEmitterTest { /** * Create a new test instance, using the correct object factory */ public LordVarysTest() { super(Weekday.SATURDAY, Event.TRAITOR_DETECTED, LordVarys::new, LordVarys::new); } }ScoutTest.java000066400000000000000000000027351322244523500341620ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/test/java/com/iluwatar/event/aggregator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.aggregator; /** * Date: 12/12/15 - 10:57 AM * * @author Jeroen Meulemeester */ public class ScoutTest extends EventEmitterTest { /** * Create a new test instance, using the correct object factory */ public ScoutTest() { super(Weekday.TUESDAY, Event.WARSHIPS_APPROACHING, Scout::new, Scout::new); } }WeekdayTest.java000066400000000000000000000032511322244523500344500ustar00rootroot00000000000000java-design-patterns-1.18.0/event-aggregator/src/test/java/com/iluwatar/event/aggregator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.aggregator; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; /** * Date: 12/12/15 - 2:12 PM * * @author Jeroen Meulemeester */ public class WeekdayTest { @Test public void testToString() throws Exception { for (final Weekday weekday : Weekday.values()) { final String toString = weekday.toString(); assertNotNull(toString); assertEquals(weekday.name(), toString.toUpperCase()); } } }java-design-patterns-1.18.0/event-asynchronous/000077500000000000000000000000001322244523500215035ustar00rootroot00000000000000java-design-patterns-1.18.0/event-asynchronous/README.md000066400000000000000000000023551322244523500227670ustar00rootroot00000000000000--- layout: pattern title: Event-based Asynchronous folder: event-asynchronous permalink: /patterns/event-asynchronous/ categories: Concurrency tags: - difficulty-intermediate - performance - Java --- ## Intent The Event-based Asynchronous Pattern makes available the advantages of multithreaded applications while hiding many of the complex issues inherent in multithreaded design. Using a class that supports this pattern can allow you to: 1. Perform time-consuming tasks, such as downloads and database operations, "in the background," without interrupting your application. 2. Execute multiple operations simultaneously, receiving notifications when each completes. 3. Wait for resources to become available without stopping ("hanging") your application. 4. Communicate with pending asynchronous operations using the familiar events-and-delegates model. ![alt text](./etc/event-asynchronous.png "Event-based Asynchronous") ## Applicability Use the Event-based Asynchronous pattern(s) when * Time-consuming tasks are needed to run in the background without disrupting the current application. ## Credits * [Event-based Asynchronous Pattern Overview](https://msdn.microsoft.com/en-us/library/wewwczdw%28v=vs.110%29.aspx?f=255&MSPPError=-2147217396) java-design-patterns-1.18.0/event-asynchronous/etc/000077500000000000000000000000001322244523500222565ustar00rootroot00000000000000java-design-patterns-1.18.0/event-asynchronous/etc/event-asynchronous.png000066400000000000000000001257751322244523500266570ustar00rootroot00000000000000PNG  IHDR| >IDATxo%G}.|J~l"aE2{b|we1 ^f c8Y3?{1kÉw /&buAx 8(:CH.њ|NϣG}TWWTu=WU`c A NفE0\A`v <Dg@ :C'D'4::!:1yf_Eh8Qxuo6HJ FNh taEg4,żDwBt@I#GtnDz4PDg"ՎpueyrJj RJ&[K) :<ު`k[:Œ_Ѣd1?P+}ޜJf+:})una_B4cAt :XL(K (J.kqEg;?,*Y )  Xh}N\i  .:gpƤE|Hٌ\`q4fLWIV&j\ !tBtzCD4:StS,zkR$sStWIjNs;cSiun&@t"" Cw8E%!܉6._L/Mv :#O:!:&"Cm;뱹6mSYtN3G:+!:$"!CeŖΕNF$"NU:50Q:\|m}GIZ"DgDD9cVD'=Ųl4]t#/Mt8t—hͿ?3?~&~Ƀ0ZJ(V"鉡k,!D't^ׯy}/䝄yvO"GޙO5 ,4wi%:__ :B@ǫ޴מO,?篻m#x7\{lGns$5c']9G7c@-EBt%}Оg"+7_^'/3>[έ35† ξ ^^+OcV:G%9&)$y ע(~cg/䘤tQwrTtk"|~==Kώi ѿhbwNq΅?{y6c/t]޹{ɿ՘T蜃S+L@fY 6\⃑k[{P~Џ^&!C3Z:??/ 6To"m+ӇhءV4b8,Qڠ]Զo˲ҲY7KrǢk[F2*lAzzLD{OnqBZ3O3HcdAUܛ5% Bh3;> ޶"9}h:{(:k LcAAY&/5)L-(9UivIs}v$=c*:wéjάuFqުyIO,ʇFPtNgcaZa:6 (lA[ _͓5]œ(: zzsv{} Z۳7~rGJ{h+Yji ޶"9}h:{(:k LcA (%'*Jc,:day7+:u'?̃JIgɷw*!:V:1аCgEg0il1(Vt}D͐5l,D4ȋvKN\FE'/m7haVGFo8ᅚTЩfkx|d2۷ڌJNݏ9yKiYu:?#WE$Ň~xZU"}}jEIOeD'qJE|3R՘Hh8rNb?dGK H I˥%t' Ygcݰi/9;N& %IBt%aP)AƔd&[@ K&:Kr7c?EK~|y>/#V>Cj/ c"r'Y:Z*,y~n:b6GvEyR[hHaHhxOG+P"36))ef+)$.*Uɛ+q03g{xHKà2IRr!UNE;J‘Cmz]a^mq1Z:Ցk ":9eұlPKZB:c=Cn.ī-_.T" U T$bfaZ ؞w+,gϹK<H#M/̊TNN*fѩkhX:o؂PJΕK:@t$*.ZɿLR)dS3(51MKWT E*Mq)S+V%ODl@N> >"ُ+U[<3lz$: W듼jiX9 Աt1 BA,Nř.6u\TiMR$m7<%|c-UJKàF+;( $LJ'(:s YhY:MW)H }h13i3iC\?K_?'f.Zx:׈֨Ōf3JL#e "&–wI.4Xp6'/?=C|h~aAP#D'XBu"FgcaZZ Ht݋N^> xÂ6> e'k1 I Gt Cl 4 9aHz[~뜭#:8@gcaNΩ CDgW}nV}h:.:aH АOXtMߊ@P1аCgE' IA2-pD_GtVT?zO{ᯗϮ{?MIvAgc2_I :aH Ӑt(RY[Q⏈ּkOII IwCl /8]5??Z IAr4u> [Q|6|_(1I!\w3nb<= }֟w! 70MfCl CgE' IA2'ѵي~z޾k/!){L%ySkYN:#aow.VVNi>1t]tnHrKN> [щc/׹OE>1M!<]N1H'&7&̀&Z_I_msqˏbxLv/eN~ˤW;s O;ZÞ :Brf_c"$W3Bt20$%D'XBc|󣷝~Џ^&!#b^CQOur]XcfQZ=ï R/xĪ4d5;i9iN"7WMl/k,zVt{ǩnx=o{I{~=_N1NE)IQ5*?j PQWBi6)/D(J4i Pq&* (2M g)gc+At- X` }ԫ[:|x$!=W~L| *X:mUtJ5!a-)":UbiBY٥K4-AZEq:2,g01=gOur@>|I:j4d)vtԢE'݊L)/F3\6? ` ӇAV+"rߍOݳ[?[$ESCgc7l5y0FMuކuF^mF%;~lT)5-f Q2h=0mVq0,zVG?sa^cCt>TtD'ǩN†%ҙlj)*)lk7_=!D'bKOBG@r0עZ:=RAt֚^oNRQ(1Ľt` ӇAчSmDlے^&gӵ 9.,k9+AN> hE>Ƙa++/o$.4]3k.S}#=R?`#Q)y !:06> [d-+AN> hE>cN~IO=%#:V` }ъ@}h:+AN> ZhHc4I40o^ϊ>1t#:V %D'XBuꚙVBb{kM·7@X8 ,96^mkp* 瘮ު|X>&r.9bW,L{G5/xYuJS"1Nf\y JHBb>QK[fW ~lv_d9V?ut,:9;qTn$d4lj> Mf2zH0I&}좓Sƫh}W,(-Q ? 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IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.event.asynchronous; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.IOException; import java.io.InputStream; import java.util.Properties; import java.util.Scanner; /** * * This application demonstrates the Event-based Asynchronous pattern. Essentially, users (of the pattern) may * choose to run events in an Asynchronous or Synchronous mode. There can be multiple Asynchronous events running at * once but only one Synchronous event can run at a time. Asynchronous events are synonymous to multi-threads. The key * point here is that the threads run in the background and the user is free to carry on with other processes. Once an * event is complete, the appropriate listener/callback method will be called. The listener then proceeds to carry out * further processing depending on the needs of the user. * * The {@link EventManager} manages the events/threads that the user creates. Currently, the supported event operations * are: start, stop, getStatus. For Synchronous events, the user is unable to * start another (Synchronous) event if one is already running at the time. The running event would have to either be * stopped or completed before a new event can be started. * * The Event-based Asynchronous Pattern makes available the advantages of multithreaded applications while hiding many * of the complex issues inherent in multithreaded design. Using a class that supports this pattern can allow you to:- * (1) Perform time-consuming tasks, such as downloads and database operations, "in the background," without * interrupting your application. (2) Execute multiple operations simultaneously, receiving notifications when each * completes. (3) Wait for resources to become available without stopping ("hanging") your application. (4) Communicate * with pending asynchronous operations using the familiar events-and-delegates model. * * @see EventManager * @see Event * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); public static final String PROP_FILE_NAME = "config.properties"; boolean interactiveMode = false; /** * Program entry point. * * @param args command line args */ public static void main(String[] args) { App app = new App(); app.setUp(); app.run(); } /** * App can run in interactive mode or not. Interactive mode == Allow user interaction with command line. * Non-interactive is a quick sequential run through the available {@link EventManager} operations. */ public void setUp() { Properties prop = new Properties(); InputStream inputStream = App.class.getClassLoader().getResourceAsStream(PROP_FILE_NAME); if (inputStream != null) { try { prop.load(inputStream); } catch (IOException e) { LOGGER.error("{} was not found. Defaulting to non-interactive mode.", PROP_FILE_NAME, e); } String property = prop.getProperty("INTERACTIVE_MODE"); if (property.equalsIgnoreCase("YES")) { interactiveMode = true; } } } /** * Run program in either interactive mode or not. */ public void run() { if (interactiveMode) { runInteractiveMode(); } else { quickRun(); } } /** * Run program in non-interactive mode. */ public void quickRun() { EventManager eventManager = new EventManager(); try { // Create an Asynchronous event. int aEventId = eventManager.createAsync(60); LOGGER.info("Async Event [{}] has been created.", aEventId); eventManager.start(aEventId); LOGGER.info("Async Event [{}] has been started.", aEventId); // Create a Synchronous event. int sEventId = eventManager.create(60); LOGGER.info("Sync Event [{}] has been created.", sEventId); eventManager.start(sEventId); LOGGER.info("Sync Event [{}] has been started.", sEventId); eventManager.status(aEventId); eventManager.status(sEventId); eventManager.cancel(aEventId); LOGGER.info("Async Event [{}] has been stopped.", aEventId); eventManager.cancel(sEventId); LOGGER.info("Sync Event [{}] has been stopped.", sEventId); } catch (MaxNumOfEventsAllowedException | LongRunningEventException | EventDoesNotExistException | InvalidOperationException e) { LOGGER.error(e.getMessage()); } } /** * Run program in interactive mode. */ public void runInteractiveMode() { EventManager eventManager = new EventManager(); Scanner s = new Scanner(System.in); int option = -1; while (option != 4) { LOGGER.info("Hello. Would you like to boil some eggs?"); LOGGER.info("(1) BOIL AN EGG \n(2) STOP BOILING THIS EGG \n(3) HOW ARE MY EGGS? \n(4) EXIT"); LOGGER.info("Choose [1,2,3,4]: "); option = s.nextInt(); if (option == 1) { s.nextLine(); LOGGER.info("Boil multiple eggs at once (A) or boil them one-by-one (S)?: "); String eventType = s.nextLine(); LOGGER.info("How long should this egg be boiled for (in seconds)?: "); int eventTime = s.nextInt(); if (eventType.equalsIgnoreCase("A")) { try { int eventId = eventManager.createAsync(eventTime); eventManager.start(eventId); LOGGER.info("Egg [{}] is being boiled.", eventId); } catch (MaxNumOfEventsAllowedException | LongRunningEventException | EventDoesNotExistException e) { LOGGER.error(e.getMessage()); } } else if (eventType.equalsIgnoreCase("S")) { try { int eventId = eventManager.create(eventTime); eventManager.start(eventId); LOGGER.info("Egg [{}] is being boiled.", eventId); } catch (MaxNumOfEventsAllowedException | InvalidOperationException | LongRunningEventException | EventDoesNotExistException e) { LOGGER.error(e.getMessage()); } } else { LOGGER.info("Unknown event type."); } } else if (option == 2) { LOGGER.info("Which egg?: "); int eventId = s.nextInt(); try { eventManager.cancel(eventId); LOGGER.info("Egg [{}] is removed from boiler.", eventId); } catch (EventDoesNotExistException e) { LOGGER.error(e.getMessage()); } } else if (option == 3) { s.nextLine(); LOGGER.info("Just one egg (O) OR all of them (A) ?: "); String eggChoice = s.nextLine(); if (eggChoice.equalsIgnoreCase("O")) { LOGGER.info("Which egg?: "); int eventId = s.nextInt(); try { eventManager.status(eventId); } catch (EventDoesNotExistException e) { LOGGER.error(e.getMessage()); } } else if (eggChoice.equalsIgnoreCase("A")) { eventManager.statusOfAllEvents(); } } else if (option == 4) { eventManager.shutdown(); } } s.close(); } } Event.java000066400000000000000000000060411322244523500342670ustar00rootroot00000000000000java-design-patterns-1.18.0/event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/** * The MIT License Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.event.asynchronous; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Each Event runs as a separate/individual thread. * */ public class Event implements IEvent, Runnable { private static final Logger LOGGER = LoggerFactory.getLogger(Event.class); private int eventId; private int eventTime; private boolean isSynchronous; private Thread thread; private boolean isComplete = false; private ThreadCompleteListener eventListener; /** * * @param eventId event ID * @param eventTime event time * @param isSynchronous is of synchronous type */ public Event(final int eventId, final int eventTime, final boolean isSynchronous) { this.eventId = eventId; this.eventTime = eventTime; this.isSynchronous = isSynchronous; } public boolean isSynchronous() { return isSynchronous; } @Override public void start() { thread = new Thread(this); thread.start(); } @Override public void stop() { if (null == thread) { return; } thread.interrupt(); } @Override public void status() { if (!isComplete) { LOGGER.info("[{}] is not done.", eventId); } else { LOGGER.info("[{}] is done.", eventId); } } @Override public void run() { long currentTime = System.currentTimeMillis(); long endTime = currentTime + (eventTime * 1000); while (System.currentTimeMillis() < endTime) { try { Thread.sleep(1000); // Sleep for 1 second. } catch (InterruptedException e) { return; } } isComplete = true; completed(); } public final void addListener(final ThreadCompleteListener listener) { this.eventListener = listener; } public final void removeListener(final ThreadCompleteListener listener) { this.eventListener = null; } private final void completed() { if (eventListener != null) { eventListener.completedEventHandler(eventId); } } } EventDoesNotExistException.java000066400000000000000000000026361322244523500404650ustar00rootroot00000000000000java-design-patterns-1.18.0/event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/** * The MIT License Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.event.asynchronous; /** * Custom Exception Class for Non Existent Event */ public class EventDoesNotExistException extends Exception { private static final long serialVersionUID = -3398463738273811509L; public EventDoesNotExistException(String message) { super(message); } } EventManager.java000066400000000000000000000165411322244523500355700ustar00rootroot00000000000000java-design-patterns-1.18.0/event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/** * The MIT License Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.event.asynchronous; import java.util.Iterator; import java.util.Map; import java.util.Random; import java.util.concurrent.ConcurrentHashMap; /** * * EventManager handles and maintains a pool of event threads. {@link Event} threads are created upon user request. Thre * are two types of events; Asynchronous and Synchronous. There can be multiple Asynchronous events running at once but * only one Synchronous event running at a time. Currently supported event operations are: start, stop, and getStatus. * Once an event is complete, it then notifies EventManager through a listener. The EventManager then takes the event * out of the pool. * */ public class EventManager implements ThreadCompleteListener { public static final int MAX_RUNNING_EVENTS = 1000; // Just don't wanna have too many running events. :) public static final int MIN_ID = 1; public static final int MAX_ID = MAX_RUNNING_EVENTS; public static final int MAX_EVENT_TIME = 1800; // in seconds / 30 minutes. private int currentlyRunningSyncEvent = -1; private Random rand; private Map eventPool; /** * EventManager constructor. * */ public EventManager() { rand = new Random(1); eventPool = new ConcurrentHashMap(MAX_RUNNING_EVENTS); } /** * Create a Synchronous event. * * @param eventTime Time an event should run for. * @return eventId * @throws MaxNumOfEventsAllowedException When too many events are running at a time. * @throws InvalidOperationException No new synchronous events can be created when one is already running. * @throws LongRunningEventException Long running events are not allowed in the app. */ public int create(int eventTime) throws MaxNumOfEventsAllowedException, InvalidOperationException, LongRunningEventException { if (currentlyRunningSyncEvent != -1) { throw new InvalidOperationException( "Event [" + currentlyRunningSyncEvent + "] is still running. Please wait until it finishes and try again."); } int eventId = createEvent(eventTime, true); currentlyRunningSyncEvent = eventId; return eventId; } /** * Create an Asynchronous event. * * @param eventTime Time an event should run for. * @return eventId * @throws MaxNumOfEventsAllowedException When too many events are running at a time. * @throws LongRunningEventException Long running events are not allowed in the app. */ public int createAsync(int eventTime) throws MaxNumOfEventsAllowedException, LongRunningEventException { return createEvent(eventTime, false); } private int createEvent(int eventTime, boolean isSynchronous) throws MaxNumOfEventsAllowedException, LongRunningEventException { if (eventPool.size() == MAX_RUNNING_EVENTS) { throw new MaxNumOfEventsAllowedException("Too many events are running at the moment. Please try again later."); } if (eventTime >= MAX_EVENT_TIME) { throw new LongRunningEventException( "Maximum event time allowed is " + MAX_EVENT_TIME + " seconds. Please try again."); } int newEventId = generateId(); Event newEvent = new Event(newEventId, eventTime, isSynchronous); newEvent.addListener(this); eventPool.put(newEventId, newEvent); return newEventId; } /** * Starts event. * * @param eventId The event that needs to be started. * @throws EventDoesNotExistException If event does not exist in our eventPool. */ public void start(int eventId) throws EventDoesNotExistException { if (!eventPool.containsKey(eventId)) { throw new EventDoesNotExistException(eventId + " does not exist."); } eventPool.get(eventId).start(); } /** * Stops event. * * @param eventId The event that needs to be stopped. * @throws EventDoesNotExistException If event does not exist in our eventPool. */ public void cancel(int eventId) throws EventDoesNotExistException { if (!eventPool.containsKey(eventId)) { throw new EventDoesNotExistException(eventId + " does not exist."); } if (eventId == currentlyRunningSyncEvent) { currentlyRunningSyncEvent = -1; } eventPool.get(eventId).stop(); eventPool.remove(eventId); } /** * Get status of a running event. * * @param eventId The event to inquire status of. * @throws EventDoesNotExistException If event does not exist in our eventPool. */ public void status(int eventId) throws EventDoesNotExistException { if (!eventPool.containsKey(eventId)) { throw new EventDoesNotExistException(eventId + " does not exist."); } eventPool.get(eventId).status(); } /** * Gets status of all running events. */ @SuppressWarnings("rawtypes") public void statusOfAllEvents() { Iterator it = eventPool.entrySet().iterator(); while (it.hasNext()) { Map.Entry pair = (Map.Entry) it.next(); ((Event) pair.getValue()).status(); } } /** * Stop all running events. */ @SuppressWarnings("rawtypes") public void shutdown() { Iterator it = eventPool.entrySet().iterator(); while (it.hasNext()) { Map.Entry pair = (Map.Entry) it.next(); ((Event) pair.getValue()).stop(); } } /** * Returns a pseudo-random number between min and max, inclusive. The difference between min and max can be at most * Integer.MAX_VALUE - 1. */ private int generateId() { // nextInt is normally exclusive of the top value, // so add 1 to make it inclusive int randomNum = rand.nextInt((MAX_ID - MIN_ID) + 1) + MIN_ID; while (eventPool.containsKey(randomNum)) { randomNum = rand.nextInt((MAX_ID - MIN_ID) + 1) + MIN_ID; } return randomNum; } /** * Callback from an {@link Event} (once it is complete). The Event is then removed from the pool. */ @Override public void completedEventHandler(int eventId) { eventPool.get(eventId).status(); if (eventPool.get(eventId).isSynchronous()) { currentlyRunningSyncEvent = -1; } eventPool.remove(eventId); } /** * Getter method for event pool. */ public Map getEventPool() { return eventPool; } /** * Get number of currently running Synchronous events. */ public int numOfCurrentlyRunningSyncEvent() { return currentlyRunningSyncEvent; } } IEvent.java000066400000000000000000000025161322244523500344030ustar00rootroot00000000000000java-design-patterns-1.18.0/event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/** * The MIT License Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.event.asynchronous; /** * Events that fulfill the start stop and list out current status behaviour * follow this interface */ public interface IEvent { void start(); void stop(); void status(); } InvalidOperationException.java000066400000000000000000000026641322244523500403430ustar00rootroot00000000000000java-design-patterns-1.18.0/event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/** * The MIT License Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.event.asynchronous; /** * Type of Exception raised when the Operation being invoked is Invalid */ public class InvalidOperationException extends Exception { private static final long serialVersionUID = -6191545255213410803L; public InvalidOperationException(String message) { super(message); } } LongRunningEventException.java000066400000000000000000000026671322244523500403410ustar00rootroot00000000000000java-design-patterns-1.18.0/event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/** * The MIT License Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.event.asynchronous; /** * Type of Exception raised when the Operation being invoked is Long Running */ public class LongRunningEventException extends Exception { private static final long serialVersionUID = -483423544320148809L; public LongRunningEventException(String message) { super(message); } } MaxNumOfEventsAllowedException.java000066400000000000000000000027031322244523500412550ustar00rootroot00000000000000java-design-patterns-1.18.0/event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/** * The MIT License Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.event.asynchronous; /** * Type of Exception raised when the max number of allowed events is exceeded */ public class MaxNumOfEventsAllowedException extends Exception { private static final long serialVersionUID = -8430876973516292695L; public MaxNumOfEventsAllowedException(String message) { super(message); } } ThreadCompleteListener.java000066400000000000000000000024711322244523500376170ustar00rootroot00000000000000java-design-patterns-1.18.0/event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/** * The MIT License Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.event.asynchronous; /** * Interface with listener behaviour related to Thread Completion. */ public interface ThreadCompleteListener { void completedEventHandler(final int eventId); } java-design-patterns-1.18.0/event-asynchronous/src/main/resources/000077500000000000000000000000001322244523500252305ustar00rootroot00000000000000java-design-patterns-1.18.0/event-asynchronous/src/main/resources/config.properties000066400000000000000000000021651322244523500306170ustar00rootroot00000000000000# # The MIT License # Copyright (c) 2014-2016 Ilkka Seppälä # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. # INTERACTIVE_MODE=NOjava-design-patterns-1.18.0/event-asynchronous/src/test/000077500000000000000000000000001322244523500232515ustar00rootroot00000000000000java-design-patterns-1.18.0/event-asynchronous/src/test/java/000077500000000000000000000000001322244523500241725ustar00rootroot00000000000000java-design-patterns-1.18.0/event-asynchronous/src/test/java/com/000077500000000000000000000000001322244523500247505ustar00rootroot00000000000000java-design-patterns-1.18.0/event-asynchronous/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500266005ustar00rootroot00000000000000java-design-patterns-1.18.0/event-asynchronous/src/test/java/com/iluwatar/event/000077500000000000000000000000001322244523500277215ustar00rootroot00000000000000java-design-patterns-1.18.0/event-asynchronous/src/test/java/com/iluwatar/event/asynchronous/000077500000000000000000000000001322244523500324545ustar00rootroot00000000000000AppTest.java000066400000000000000000000026221322244523500346220ustar00rootroot00000000000000java-design-patterns-1.18.0/event-asynchronous/src/test/java/com/iluwatar/event/asynchronous/** * The MIT License Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.event.asynchronous; import org.junit.jupiter.api.Test; import java.io.IOException; /** * Tests that EventAsynchronous example runs without errors. */ public class AppTest { @Test public void test() throws IOException { String[] args = {}; App.main(args); } } EventAsynchronousTest.java000066400000000000000000000124651322244523500376050ustar00rootroot00000000000000java-design-patterns-1.18.0/event-asynchronous/src/test/java/com/iluwatar/event/asynchronous/** * The MIT License Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.event.asynchronous; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import static org.junit.jupiter.api.Assertions.assertThrows; import static org.junit.jupiter.api.Assertions.assertTrue; /** * * Application test * */ public class EventAsynchronousTest { App app; private static final Logger LOGGER = LoggerFactory.getLogger(EventAsynchronousTest.class); @BeforeEach public void setUp() { app = new App(); } @Test public void testAsynchronousEvent() { EventManager eventManager = new EventManager(); try { int aEventId = eventManager.createAsync(60); eventManager.start(aEventId); assertTrue(eventManager.getEventPool().size() == 1); assertTrue(eventManager.getEventPool().size() < EventManager.MAX_RUNNING_EVENTS); assertTrue(eventManager.numOfCurrentlyRunningSyncEvent() == -1); eventManager.cancel(aEventId); assertTrue(eventManager.getEventPool().size() == 0); } catch (MaxNumOfEventsAllowedException | LongRunningEventException | EventDoesNotExistException e) { LOGGER.error(e.getMessage()); } } @Test public void testSynchronousEvent() { EventManager eventManager = new EventManager(); try { int sEventId = eventManager.create(60); eventManager.start(sEventId); assertTrue(eventManager.getEventPool().size() == 1); assertTrue(eventManager.getEventPool().size() < EventManager.MAX_RUNNING_EVENTS); assertTrue(eventManager.numOfCurrentlyRunningSyncEvent() != -1); eventManager.cancel(sEventId); assertTrue(eventManager.getEventPool().size() == 0); } catch (MaxNumOfEventsAllowedException | LongRunningEventException | EventDoesNotExistException | InvalidOperationException e) { LOGGER.error(e.getMessage()); } } @Test public void testUnsuccessfulSynchronousEvent() throws InvalidOperationException { assertThrows(InvalidOperationException.class, () -> { EventManager eventManager = new EventManager(); try { int sEventId = eventManager.create(60); eventManager.start(sEventId); sEventId = eventManager.create(60); eventManager.start(sEventId); } catch (MaxNumOfEventsAllowedException | LongRunningEventException | EventDoesNotExistException e) { LOGGER.error(e.getMessage()); } }); } @Test public void testFullSynchronousEvent() { EventManager eventManager = new EventManager(); try { int eventTime = 1; int sEventId = eventManager.create(eventTime); assertTrue(eventManager.getEventPool().size() == 1); eventManager.start(sEventId); long currentTime = System.currentTimeMillis(); long endTime = currentTime + (eventTime + 2 * 1000); // +2 to give a bit of buffer time for event to // complete // properly. while (System.currentTimeMillis() < endTime) { } assertTrue(eventManager.getEventPool().size() == 0); } catch (MaxNumOfEventsAllowedException | LongRunningEventException | EventDoesNotExistException | InvalidOperationException e) { LOGGER.error(e.getMessage()); } } @Test public void testFullAsynchronousEvent() { EventManager eventManager = new EventManager(); try { int eventTime = 1; int aEventId1 = eventManager.createAsync(eventTime); int aEventId2 = eventManager.createAsync(eventTime); int aEventId3 = eventManager.createAsync(eventTime); assertTrue(eventManager.getEventPool().size() == 3); eventManager.start(aEventId1); eventManager.start(aEventId2); eventManager.start(aEventId3); long currentTime = System.currentTimeMillis(); long endTime = currentTime + (eventTime + 2 * 1000); // +2 to give a bit of buffer time for event to complete // properly. while (System.currentTimeMillis() < endTime) { } assertTrue(eventManager.getEventPool().size() == 0); } catch (MaxNumOfEventsAllowedException | LongRunningEventException | EventDoesNotExistException e) { LOGGER.error(e.getMessage()); } } } java-design-patterns-1.18.0/event-driven-architecture/000077500000000000000000000000001322244523500227175ustar00rootroot00000000000000java-design-patterns-1.18.0/event-driven-architecture/README.md000066400000000000000000000032511322244523500241770ustar00rootroot00000000000000--- layout: pattern title: Event Driven Architecture folder: event-driven-architecture permalink: /patterns/event-driven-architecture/ categories: Architectural tags: - Java - Difficulty-Intermediate - Reactive --- ## Intent Send and notify state changes of your objects to other applications using an Event-driven Architecture. ![alt text](./etc/eda.png "Event Driven Architecture") ## Applicability Use an Event-driven architecture when * you want to create a loosely coupled system * you want to build a more responsive system * you want a system that is easier to extend ## Real world examples * SendGrid, an email API, sends events whenever an email is processed, delivered, opened etc... (https://sendgrid.com/docs/API_Reference/Webhooks/event.html) * Chargify, a billing API, exposes payment activity through various events (https://docs.chargify.com/api-events) * Amazon's AWS Lambda, lets you execute code in response to events such as changes to Amazon S3 buckets, updates to an Amazon DynamoDB table, or custom events generated by your applications or devices. (https://aws.amazon.com/lambda) * MySQL runs triggers based on events such as inserts and update events happening on database tables. ## Credits * [Event-driven architecture - Wikipedia](https://en.wikipedia.org/wiki/Event-driven_architecture) * [Fundamental Components of an Event-Driven Architecture](http://giocc.com/fundamental-components-of-an-event-driven-architecture.html) * [Real World Applications/Event Driven Applications](https://wiki.haskell.org/Real_World_Applications/Event_Driven_Applications) * [Event-driven architecture definition](http://searchsoa.techtarget.com/definition/event-driven-architecture) java-design-patterns-1.18.0/event-driven-architecture/etc/000077500000000000000000000000001322244523500234725ustar00rootroot00000000000000java-design-patterns-1.18.0/event-driven-architecture/etc/eda.png000066400000000000000000001621541322244523500247420ustar00rootroot00000000000000PNG  IHDRAD_%3IDATx \Mf,cɠ_߱ RR%B5ERID2"1P!I1K3͌14+1Ksns{?}||>~笯UAAb5   i8  A  Dkp U0AAuE4AA54i8  i8pAAp *p&ڽRL>-|׫Zoje220ຍ4AAuC-5ܣGNڪ fZ_ih.X,|\%ݱc! 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eda; import com.iluwatar.eda.event.UserCreatedEvent; import com.iluwatar.eda.event.UserUpdatedEvent; import com.iluwatar.eda.framework.Event; import com.iluwatar.eda.framework.EventDispatcher; import com.iluwatar.eda.handler.UserCreatedEventHandler; import com.iluwatar.eda.handler.UserUpdatedEventHandler; import com.iluwatar.eda.model.User; /** * An event-driven architecture (EDA) is a framework that orchestrates behavior around the * production, detection and consumption of events as well as the responses they evoke. An event is * any identifiable occurrence that has significance for system hardware or software.

The * example below uses an {@link EventDispatcher} to link/register {@link Event} objects to their * respective handlers once an {@link Event} is dispatched, it's respective handler is invoked and * the {@link Event} is handled accordingly. * */ public class App { /** * Once the {@link EventDispatcher} is initialised, handlers related to specific events have to be * made known to the dispatcher by registering them. In this case the {@link UserCreatedEvent} is * bound to the UserCreatedEventHandler, whilst the {@link UserUpdatedEvent} is bound to the * {@link UserUpdatedEventHandler}. The dispatcher can now be called to dispatch specific events. * When a user is saved, the {@link UserCreatedEvent} can be dispatched. * On the other hand, when a user is updated, {@link UserUpdatedEvent} can be dispatched. * */ public static void main(String[] args) { EventDispatcher dispatcher = new EventDispatcher(); dispatcher.registerHandler(UserCreatedEvent.class, new UserCreatedEventHandler()); dispatcher.registerHandler(UserUpdatedEvent.class, new UserUpdatedEventHandler()); User user = new User("iluwatar"); dispatcher.dispatch(new UserCreatedEvent(user)); dispatcher.dispatch(new UserUpdatedEvent(user)); } } java-design-patterns-1.18.0/event-driven-architecture/src/main/java/com/iluwatar/eda/event/000077500000000000000000000000001322244523500316335ustar00rootroot00000000000000AbstractEvent.java000066400000000000000000000040101322244523500351570ustar00rootroot00000000000000java-design-patterns-1.18.0/event-driven-architecture/src/main/java/com/iluwatar/eda/event/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eda.event; import com.iluwatar.eda.framework.EventDispatcher; import com.iluwatar.eda.framework.Event; /** * The {@link AbstractEvent} class serves as a base class for defining custom events happening with your * system. In this example we have two types of events defined. *

    *
  • {@link UserCreatedEvent} - used when a user is created
    • *
  • {@link UserUpdatedEvent} - used when a user is updated
    • *
* Events can be distinguished using the {@link #getType() getType} method. */ public abstract class AbstractEvent implements Event { /** * Returns the event type as a {@link Class} object * In this example, this method is used by the {@link EventDispatcher} to * dispatch events depending on their type. * * @return the AbstractEvent type as a {@link Class}. */ public Class getType() { return getClass(); } }UserCreatedEvent.java000066400000000000000000000032171322244523500356320ustar00rootroot00000000000000java-design-patterns-1.18.0/event-driven-architecture/src/main/java/com/iluwatar/eda/event/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eda.event; import com.iluwatar.eda.model.User; /** * The {@link UserCreatedEvent} should should be dispatched whenever a user has been created. * This class can be extended to contain details about the user has been created. In this example, * the entire {@link User} object is passed on as data with the event. */ public class UserCreatedEvent extends AbstractEvent { private User user; public UserCreatedEvent(User user) { this.user = user; } public User getUser() { return user; } } UserUpdatedEvent.java000066400000000000000000000032171322244523500356510ustar00rootroot00000000000000java-design-patterns-1.18.0/event-driven-architecture/src/main/java/com/iluwatar/eda/event/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eda.event; import com.iluwatar.eda.model.User; /** * The {@link UserUpdatedEvent} should should be dispatched whenever a user has been updated. * This class can be extended to contain details about the user has been updated. In this example, * the entire {@link User} object is passed on as data with the event. */ public class UserUpdatedEvent extends AbstractEvent { private User user; public UserUpdatedEvent(User user) { this.user = user; } public User getUser() { return user; } } java-design-patterns-1.18.0/event-driven-architecture/src/main/java/com/iluwatar/eda/framework/000077500000000000000000000000001322244523500325075ustar00rootroot00000000000000Event.java000066400000000000000000000030251322244523500343540ustar00rootroot00000000000000java-design-patterns-1.18.0/event-driven-architecture/src/main/java/com/iluwatar/eda/framework/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eda.framework; /** * A {@link Event} is an object with a specific type that is associated * to a specific {@link Handler}. */ public interface Event { /** * Returns the message type as a {@link Class} object. In this example the message type is * used to handle events by their type. * @return the message type as a {@link Class}. */ Class getType(); } EventDispatcher.java000066400000000000000000000044341322244523500363700ustar00rootroot00000000000000java-design-patterns-1.18.0/event-driven-architecture/src/main/java/com/iluwatar/eda/framework/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eda.framework; import java.util.HashMap; import java.util.Map; /** * Handles the routing of {@link Event} messages to associated handlers. * A {@link HashMap} is used to store the association between events and their respective handlers. */ public class EventDispatcher { private Map, Handler> handlers; public EventDispatcher() { handlers = new HashMap<>(); } /** * Links an {@link Event} to a specific {@link Handler}. * * @param eventType The {@link Event} to be registered * @param handler The {@link Handler} that will be handling the {@link Event} */ public void registerHandler(Class eventType, Handler handler) { handlers.put(eventType, handler); } /** * Dispatches an {@link Event} depending on it's type. * * @param event The {@link Event} to be dispatched */ @SuppressWarnings("unchecked") public void dispatch(E event) { Handler handler = (Handler) handlers.get(event.getClass()); if (handler != null) { handler.onEvent(event); } } }Handler.java000066400000000000000000000033311322244523500346500ustar00rootroot00000000000000java-design-patterns-1.18.0/event-driven-architecture/src/main/java/com/iluwatar/eda/framework/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eda.framework; /** * This interface can be implemented to handle different types of messages. * Every handler is responsible for a single of type message * @param Handler can handle events of type E */ public interface Handler { /** * The onEvent method should implement and handle behavior related to the event. * This can be as simple as calling another service to handle the event on publishing the event on * a queue to be consumed by other sub systems. * @param event the {@link Event} object to be handled. */ void onEvent(E event); } java-design-patterns-1.18.0/event-driven-architecture/src/main/java/com/iluwatar/eda/handler/000077500000000000000000000000001322244523500321275ustar00rootroot00000000000000UserCreatedEventHandler.java000066400000000000000000000032511322244523500374220ustar00rootroot00000000000000java-design-patterns-1.18.0/event-driven-architecture/src/main/java/com/iluwatar/eda/handler/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eda.handler; import com.iluwatar.eda.event.UserCreatedEvent; import com.iluwatar.eda.framework.Handler; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Handles the {@link UserCreatedEvent} message. */ public class UserCreatedEventHandler implements Handler { private static final Logger LOGGER = LoggerFactory.getLogger(UserCreatedEventHandler.class); @Override public void onEvent(UserCreatedEvent event) { LOGGER.info("User '{}' has been Created!", event.getUser().getUsername()); } } UserUpdatedEventHandler.java000066400000000000000000000032501322244523500374400ustar00rootroot00000000000000java-design-patterns-1.18.0/event-driven-architecture/src/main/java/com/iluwatar/eda/handler/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eda.handler; import com.iluwatar.eda.event.UserUpdatedEvent; import com.iluwatar.eda.framework.Handler; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Handles the {@link UserUpdatedEvent} message. */ public class UserUpdatedEventHandler implements Handler { private static final Logger LOGGER = LoggerFactory.getLogger(UserUpdatedEventHandler.class); @Override public void onEvent(UserUpdatedEvent event) { LOGGER.info("User '{}' has been Updated!", event.getUser().getUsername()); } } java-design-patterns-1.18.0/event-driven-architecture/src/main/java/com/iluwatar/eda/model/000077500000000000000000000000001322244523500316125ustar00rootroot00000000000000java-design-patterns-1.18.0/event-driven-architecture/src/main/java/com/iluwatar/eda/model/User.java000066400000000000000000000031211322244523500333700ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eda.model; import com.iluwatar.eda.event.UserCreatedEvent; import com.iluwatar.eda.event.UserUpdatedEvent; /** * This {@link User} class is a basic pojo used to demonstrate user data sent along with * the {@link UserCreatedEvent} and {@link UserUpdatedEvent} events. */ public class User { private String username; public User(String username) { this.username = username; } public String getUsername() { return username; } } java-design-patterns-1.18.0/event-driven-architecture/src/test/000077500000000000000000000000001322244523500244655ustar00rootroot00000000000000java-design-patterns-1.18.0/event-driven-architecture/src/test/java/000077500000000000000000000000001322244523500254065ustar00rootroot00000000000000java-design-patterns-1.18.0/event-driven-architecture/src/test/java/com/000077500000000000000000000000001322244523500261645ustar00rootroot00000000000000java-design-patterns-1.18.0/event-driven-architecture/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500300145ustar00rootroot00000000000000java-design-patterns-1.18.0/event-driven-architecture/src/test/java/com/iluwatar/eda/000077500000000000000000000000001322244523500305455ustar00rootroot00000000000000java-design-patterns-1.18.0/event-driven-architecture/src/test/java/com/iluwatar/eda/AppTest.java000066400000000000000000000026351322244523500327760ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eda; import org.junit.jupiter.api.Test; import java.io.IOException; /** * Tests that Event Driven Architecture example runs without errors. */ public class AppTest { @Test public void test() throws IOException { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/event-driven-architecture/src/test/java/com/iluwatar/eda/event/000077500000000000000000000000001322244523500316665ustar00rootroot00000000000000UserCreatedEventTest.java000066400000000000000000000034451322244523500365300ustar00rootroot00000000000000java-design-patterns-1.18.0/event-driven-architecture/src/test/java/com/iluwatar/eda/event/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eda.event; import com.iluwatar.eda.model.User; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * {@link UserCreatedEventTest} tests and verifies {@link AbstractEvent} behaviour. */ public class UserCreatedEventTest { /** * This unit test should correctly return the {@link AbstractEvent} class type when calling the * {@link AbstractEvent#getType() getType} method. */ @Test public void testGetEventType() { User user = new User("iluwatar"); UserCreatedEvent userCreatedEvent = new UserCreatedEvent(user); assertEquals(UserCreatedEvent.class, userCreatedEvent.getType()); } } java-design-patterns-1.18.0/event-driven-architecture/src/test/java/com/iluwatar/eda/framework/000077500000000000000000000000001322244523500325425ustar00rootroot00000000000000EventDispatcherTest.java000066400000000000000000000056251322244523500372660ustar00rootroot00000000000000java-design-patterns-1.18.0/event-driven-architecture/src/test/java/com/iluwatar/eda/framework/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.eda.framework; import com.iluwatar.eda.event.UserCreatedEvent; import com.iluwatar.eda.event.UserUpdatedEvent; import com.iluwatar.eda.handler.UserCreatedEventHandler; import com.iluwatar.eda.handler.UserUpdatedEventHandler; import com.iluwatar.eda.model.User; import org.junit.jupiter.api.Test; import static org.mockito.Mockito.spy; import static org.mockito.Mockito.verify; /** * Event Dispatcher unit tests to assert and verify correct event dispatcher behaviour */ public class EventDispatcherTest { /** * This unit test should register events and event handlers correctly with the event dispatcher * and events should be dispatched accordingly. */ @Test public void testEventDriverPattern() { EventDispatcher dispatcher = spy(new EventDispatcher()); UserCreatedEventHandler userCreatedEventHandler = spy(new UserCreatedEventHandler()); UserUpdatedEventHandler userUpdatedEventHandler = spy(new UserUpdatedEventHandler()); dispatcher.registerHandler(UserCreatedEvent.class, userCreatedEventHandler); dispatcher.registerHandler(UserUpdatedEvent.class, userUpdatedEventHandler); User user = new User("iluwatar"); UserCreatedEvent userCreatedEvent = new UserCreatedEvent(user); UserUpdatedEvent userUpdatedEvent = new UserUpdatedEvent(user); //fire a userCreatedEvent and verify that userCreatedEventHandler has been invoked. dispatcher.dispatch(userCreatedEvent); verify(userCreatedEventHandler).onEvent(userCreatedEvent); verify(dispatcher).dispatch(userCreatedEvent); //fire a userCreatedEvent and verify that userUpdatedEventHandler has been invoked. dispatcher.dispatch(userUpdatedEvent); verify(userUpdatedEventHandler).onEvent(userUpdatedEvent); verify(dispatcher).dispatch(userUpdatedEvent); } } java-design-patterns-1.18.0/event-queue/000077500000000000000000000000001322244523500200745ustar00rootroot00000000000000java-design-patterns-1.18.0/event-queue/README.md000066400000000000000000000015011322244523500213500ustar00rootroot00000000000000--- layout: pattern title: Event Queue folder: event-queue permalink: /patterns/event-queue/ categories: Concurrency tags: - Java - Difficulty Intermediate - Queue --- ## Intent Event Queue is a good pattern if You have a limited accessibility resource (for example: Audio or Database), but You need to handle all the requests that want to use that. It puts all the requests in a queue and process them asynchronously. 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.queue; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import javax.sound.sampled.UnsupportedAudioFileException; /** * Event or message queues provide an asynchronous communications protocol, meaning that the sender * and receiver of the message do not need to interact with the message queue at the same time. * Events or messages placed onto the queue are stored until the recipient retrieves them. Event * or message queues have implicit or explicit limits on the size of data that may be transmitted * in a single message and the number of messages that may remain outstanding on the queue. * A queue stores a series of notifications or requests in first-in, first-out order. * Sending a notification enqueues the request and returns. The request processor then processes * items from the queue at a later time. */ public class App { /** * Program entry point. * * @param args command line args * @throws IOException when there is a problem with the audio file loading * @throws UnsupportedAudioFileException when the loaded audio file is unsupported */ public static void main(String[] args) throws UnsupportedAudioFileException, IOException { Audio.playSound(Audio.getAudioStream("./etc/Bass-Drum-1.wav"), -10.0f); Audio.playSound(Audio.getAudioStream("./etc/Closed-Hi-Hat-1.wav"), -8.0f); System.out.println("Press Enter key to stop the program..."); BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br.read(); Audio.stopService(); } } java-design-patterns-1.18.0/event-queue/src/main/java/com/iluwatar/event/queue/Audio.java000066400000000000000000000121751322244523500313150ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.queue; import java.io.File; import java.io.IOException; import javax.sound.sampled.AudioInputStream; import javax.sound.sampled.AudioSystem; import javax.sound.sampled.Clip; import javax.sound.sampled.LineUnavailableException; import javax.sound.sampled.UnsupportedAudioFileException; /** * This class implements the Event Queue pattern. * @author mkuprivecz * */ public class Audio { private static final int MAX_PENDING = 16; private static int headIndex; private static int tailIndex; private static Thread updateThread = null; private static PlayMessage[] pendingAudio = new PlayMessage[MAX_PENDING]; /** * This method stops the Update Method's thread. */ public static synchronized void stopService() { if (updateThread != null) { updateThread.interrupt(); } } /** * This method stops the Update Method's thread. * @return boolean */ public static synchronized boolean isServiceRunning() { if (updateThread != null && updateThread.isAlive() ) { return true; } else { return false; } } /** * Starts the thread for the Update Method pattern if it was not started previously. * Also when the thread is is ready initializes the indexes of the queue */ public static void init() { if (updateThread == null) { updateThread = new Thread(new Runnable() { public void run() { while (!Thread.currentThread().isInterrupted()) { Audio.update(); } } }); } startThread(); } /** * This is a synchronized thread starter */ public static synchronized void startThread() { if (!updateThread.isAlive()) { updateThread.start(); headIndex = 0; tailIndex = 0; } } /** * This method adds a new audio into the queue. * @param stream is the AudioInputStream for the method * @param volume is the level of the audio's volume */ public static void playSound(AudioInputStream stream, float volume) { init(); // Walk the pending requests. for (int i = headIndex; i != tailIndex; i = (i + 1) % MAX_PENDING) { if (getPendingAudio()[i].getStream() == stream) { // Use the larger of the two volumes. getPendingAudio()[i].setVolume(Math.max(volume, getPendingAudio()[i].getVolume())); // Don't need to enqueue. return; } } getPendingAudio()[tailIndex] = new PlayMessage(stream, volume); tailIndex = (tailIndex + 1) % MAX_PENDING; } /** * This method uses the Update Method pattern. * It takes the audio from the queue and plays it */ public static void update() { // If there are no pending requests, do nothing. if (headIndex == tailIndex) { return; } Clip clip = null; try { AudioInputStream audioStream = getPendingAudio()[headIndex].getStream(); headIndex++; clip = AudioSystem.getClip(); clip.open(audioStream); clip.start(); } catch (LineUnavailableException e) { System.err.println("Error occoured while loading the audio: The line is unavailable"); e.printStackTrace(); } catch (IOException e) { System.err.println("Input/Output error while loading the audio"); e.printStackTrace(); } catch (IllegalArgumentException e) { System.err.println("The system doesn't support the sound: " + e.getMessage()); } } /** * Returns the AudioInputStream of a file * @param filePath is the path of the audio file * @return AudioInputStream * @throws UnsupportedAudioFileException when the audio file is not supported * @throws IOException when the file is not readable */ public static AudioInputStream getAudioStream(String filePath) throws UnsupportedAudioFileException, IOException { return AudioSystem.getAudioInputStream(new File(filePath).getAbsoluteFile()); } /** * Returns with the message array of the queue * @return PlayMessage[] */ public static PlayMessage[] getPendingAudio() { return pendingAudio; } } java-design-patterns-1.18.0/event-queue/src/main/java/com/iluwatar/event/queue/PlayMessage.java000066400000000000000000000034171322244523500324650ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.queue; import javax.sound.sampled.AudioInputStream; /** * The Event Queue's queue will store the instances of this class. * @author mkuprivecz * */ public class PlayMessage { private AudioInputStream stream; private float volume; public PlayMessage(AudioInputStream stream, float volume) { setStream(stream); setVolume(volume); } public AudioInputStream getStream() { return stream; } private void setStream(AudioInputStream stream) { this.stream = stream; } public float getVolume() { return volume; } public void setVolume(float volume) { this.volume = volume; } } java-design-patterns-1.18.0/event-queue/src/test/000077500000000000000000000000001322244523500216425ustar00rootroot00000000000000java-design-patterns-1.18.0/event-queue/src/test/java/000077500000000000000000000000001322244523500225635ustar00rootroot00000000000000java-design-patterns-1.18.0/event-queue/src/test/java/com/000077500000000000000000000000001322244523500233415ustar00rootroot00000000000000java-design-patterns-1.18.0/event-queue/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500251715ustar00rootroot00000000000000java-design-patterns-1.18.0/event-queue/src/test/java/com/iluwatar/event/000077500000000000000000000000001322244523500263125ustar00rootroot00000000000000java-design-patterns-1.18.0/event-queue/src/test/java/com/iluwatar/event/queue/000077500000000000000000000000001322244523500274365ustar00rootroot00000000000000java-design-patterns-1.18.0/event-queue/src/test/java/com/iluwatar/event/queue/AudioTest.java000066400000000000000000000061021322244523500322010ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.queue; import org.junit.jupiter.api.Test; import javax.sound.sampled.UnsupportedAudioFileException; import java.io.IOException; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Testing the Audio service of the Queue * @author mkuprivecz * */ public class AudioTest { /** * Test here that the playSound method works correctly * @throws UnsupportedAudioFileException when the audio file is not supported * @throws IOException when the file is not readable * @throws InterruptedException when the test is interrupted externally */ @Test public void testPlaySound() throws UnsupportedAudioFileException, IOException, InterruptedException { Audio.playSound(Audio.getAudioStream("./etc/Bass-Drum-1.wav"), -10.0f); // test that service is started assertTrue(Audio.isServiceRunning()); // adding a small pause to be sure that the sound is ended Thread.sleep(5000); // test that service is finished assertFalse(!Audio.isServiceRunning()); } /** * Test here that the Queue * @throws UnsupportedAudioFileException when the audio file is not supported * @throws IOException when the file is not readable * @throws InterruptedException when the test is interrupted externally */ @Test public void testQueue() throws UnsupportedAudioFileException, IOException, InterruptedException { Audio.playSound(Audio.getAudioStream("./etc/Bass-Drum-1.aif"), -10.0f); Audio.playSound(Audio.getAudioStream("./etc/Bass-Drum-1.aif"), -10.0f); Audio.playSound(Audio.getAudioStream("./etc/Bass-Drum-1.aif"), -10.0f); assertTrue(Audio.getPendingAudio().length > 0); // test that service is started assertTrue(Audio.isServiceRunning()); // adding a small pause to be sure that the sound is ended Thread.sleep(10000); // test that service is finished assertFalse(!Audio.isServiceRunning()); } } java-design-patterns-1.18.0/event-sourcing/000077500000000000000000000000001322244523500206015ustar00rootroot00000000000000java-design-patterns-1.18.0/event-sourcing/README.md000066400000000000000000000030771322244523500220670ustar00rootroot00000000000000--- layout: pattern title: Event Sourcing folder: event-sourcing permalink: /patterns/event-sourcing/ categories: Architectural tags: - Java - Difficulty Intermediate - Performance --- ## Intent Instead of storing just the current state of the data in a domain, use an append-only store to record the full series of actions taken on that data. The store acts as the system of record and can be used to materialize the domain objects. This can simplify tasks in complex domains, by avoiding the need to synchronize the data model and the business domain, while improving performance, scalability, and responsiveness. It can also provide consistency for transactional data, and maintain full audit trails and history that can enable compensating actions. ![alt text](./etc/event-sourcing.png "Event Sourcing") ## Applicability Use the Event Sourcing pattern when * You need very high performance on persisting your application state even your application state have a complex relational data structure * You need log of changes of your application state and ability to restore a state of any moment in time. * You need to debug production problems by replaying the past events. ## Real world examples * [The Lmax Architecture] (https://martinfowler.com/articles/lmax.html) ## Credits * [Martin Fowler - Event Sourcing] (https://martinfowler.com/eaaDev/EventSourcing.html) * [Event Sourcing | Microsoft Docs] (https://docs.microsoft.com/en-us/azure/architecture/patterns/event-sourcing) * [Reference 3: Introducing Event Sourcing] (https://msdn.microsoft.com/en-us/library/jj591559.aspx) java-design-patterns-1.18.0/event-sourcing/etc/000077500000000000000000000000001322244523500213545ustar00rootroot00000000000000java-design-patterns-1.18.0/event-sourcing/etc/event-sourcing.png000066400000000000000000001656631322244523500250530ustar00rootroot00000000000000PNG  IHDRgμ[zIDATx]$Wy[BM$"_sNFqnb 1#-{pL8 Ƣm`5&3kLdK1%H .Yb}\,B=,Xd{YpP [hæjet͋یnv?SW .@)+k(ѬќXȼڵSX(ee !552 \F{>nJ lv:dzzw*Xm6>^Sh5 ѬV`09AmXp kf1x.f1_ol_X2hUER&:1i-%6#ro;TmHowdR dk]Rh:5dѬV`dme64jZǑ7e1j4g-m5mVeF臝hTD20y7]l:1kLp[:nQV[M6װUU_Xdea$552,0&RlלXoo먿=0lOVG_R.ь *kR&z-O4cQSBD36(5u2 ь *kFM  Q@F?lkj*eD36(F?\ER2hTފfMML W_;x6~3ۯ>%>flPV4kj*eZZ`\~ ̼n~c?}ly᷈b͚J̪#3I'y7>tȆ#ͦ8G' H$¤.zJҌ pފfMMLKW_;ϴ>/ѿO.|SjA.l b.[Ѭi '>ԇ{_ K?ï?(|amC8&ՄA%zS\S7ƶXېZa k t#ر磁O .I;/+$U͚Ju~_~o~n|OC}>:چq iCxxRfiގhi\zUt:\}ML)6(b٬He,l͚J7_cӷu^৯SO>p?|oz͗ޥmXY&r,xPbD$+`"˜p.;ܿ}n+>GY;VzhinEuŊռ0b43(:g-.6bP楠FOaaaXhTʴ<|qϿ8i@wm|/ 7_hͷih7m)\k,LmސQVWC}o`WХVut B I>$KwS<|{^V'oA5552-!0X[޳O<{?)??߬=q-@puw +},eL`+"^Rhq&hb[Xx y8:gW?bϓM&@KR6椁3 ƠUsoDc6O~k@ZU߶bڕ>ii[>uۻ}_--,Tь YGࠐCHGk)V3VLpܤU8⁔]ZRY Tʴx\?>`ZhƆ,#pPT[l8M, b9mOx(_S|uͫƝG{3o'C2Y4cg> p9Э1GVbdy1V'2Y4cgJ졟]HsB<<2uVUI?&՞ E=_AX>ς36V 5% wZÓJJYkB9flL)179QwΈ$X{8d- ECh͹lIi!$G< !ys5.qD@L5D36|d<ҴD0I8WcN"ٰ .V*i-aRK( p@bE@L$kMhI>C+a6}Xp k6m5^YL]U}IR`s+Kp@E@LjMh>C''mr$؆4cdnbnMk*/)\GZh>)诇sX7.M"4Y*3*m4>ܣ0N00жԦVł@-Q4 Tʔ`KW[ځJ 3$+*k^lMEý&vSѰN1r XyIpK ɇ |2P)Id֊Z2E Eմ-6ji~&k;)7di7\%Ni?jqi yESWDDkҮ=O:W*&ɱiZd<z,YF3%^~^o+Ӡ'oh"d7^*!=D@LR`fԠCS,6l6)\,w~wݞwj&Z\rJ❺B@LJgX&$NJ5e!m+K/,ɂ4cgPQ,#pdR&10WqlS%;ǽnwߞ IUX'$-h(yagrNdڹǿ2B9v9,J>g!<'2bx}{`z`|{5כ{n&R]/W;eXiM[ZoujnN+6 [0GQDγ(El **xp@?)|2P)q%/bc_(@4lNNx*ץIɍݧ9gK ɼ St'"?T|rdjڮ|9R=,bK\B<{86SdR&Ԛ-Ȱ\4cg> {8s)@L5)F , }8Hp@tdR&Ԛ>flLx||w}aw>Ӻ3&,Ah/N|O*eY4cgR>ۡ/~SA3 dkEEv^)@Lp>flLxdV7y?מO/ؿO?[$#$^*@k&QDxRV袽.ڹB ThƆLW_;ϴ>/ʶso|GZHyY䢠n]0l>.8!T˗rE@L7vDmZE'>ԇ{_ ǟ矍Nw_xOpb"vSq۸ 󤝠p=m5ި3Hp0UFq+BG1TjZh>b`VPY{+O*eB`,3ibw·e+o}ݷ춘 _~m1mT+X2n4i[vѧt+X]Vh-4UbANV4 Tʔ%01_]hь oں{/n[{?\tGRņ+ne(HbAj߮!g4c[ލ߸ >q[Ndex1 \y” mcłRYC'2eraFANPuȬ[>uۻ}_-,,T6!XoE@L9M/K4GPjь Iv7[{_DB<pފ擁Jfrul^3sPjь AE /NdR&w`wr6JVHƦ$d6c=@U YG`!̢dR._~ B8c3*ιuVXxrN#O*eb;[RqMZ4cgb}8@WloE@L)bϮ^3؉8sSZ4cgb}8T[ZO޳K '2ϋ5SO|Ll=@E36|.g!b+,dRjxz|]<]l=juě%8g]|])K 3wĕi4HbTlsizKw`J9I5w}`Qz4[ޕ<*QֻUjdR&,3~nB<)]d<+U{TRշ z^&]mQ նm{+h> .gь 7/%f@+^tD3Y}>R)H㆓;ese~nO|j{RDfTYuLߎkTYJնX,OO_Zq<5_[YMPVC!^lYT*XvظSuSXVp)E@Lp>fl+86vۓv\jTZ~B-F]A-Q[1'k;kD{[+!CkC9q)3:b*]9F^z[rgh"`P)\Ϣ>cn-.6n`|{5כ{n&5\_A(j.VZ G[[cŊ V?x|9դ'rg:#ֻގc$"޻KwW|3u(\=ϒWC4 ThƆ(W*X}ɢfSvrh'Ͻr^ /wLjm(UND?T|rdjڮ|9R=,bAvYYk+!O*et /-4hƆ[h%2,8&7j擁J2Xa:.4hƆ.RʨbA[|2P)Ӭ. /3|8[|2P) A:A_4cgPQ,#pdR&mYMQu8qiJOL36|B<x8x+O*e}29+;LG«a5fli잖q|Vb{+O*er< pTg}z;Y"A c=N[lkRYUf0JrY*x]>PL0ؘ؛nz} @+|R;yjfe·4IpA+#WA% r|x羾d! 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.sourcing.app; import com.iluwatar.event.sourcing.event.AccountCreateEvent; import com.iluwatar.event.sourcing.event.MoneyDepositEvent; import com.iluwatar.event.sourcing.event.MoneyTransferEvent; import com.iluwatar.event.sourcing.processor.DomainEventProcessor; import com.iluwatar.event.sourcing.state.AccountAggregate; import java.math.BigDecimal; import java.util.Date; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Event Sourcing : Instead of storing just the current state of the data in a domain, use an * append-only store to record the full series of actions taken on that data. The store acts as the * system of record and can be used to materialize the domain objects. This can simplify tasks in * complex domains, by avoiding the need to synchronize the data model and the business domain, * while improving performance, scalability, and responsiveness. It can also provide consistency for * transactional data, and maintain full audit trails and history that can enable compensating * actions. * * This App class is an example usage of Event Sourcing pattern. As an example, two bank account is * created, then some money deposit and transfer actions are taken so a new state of accounts is * created. At that point, state is cleared in order to represent a system shot down. After the shot * down, system state is recovered by re-creating the past events from event journal. Then state is * printed so a user can view the last state is same with the state before system shot down. * * Created by Serdar Hamzaogullari on 06.08.2017. */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * The constant ACCOUNT OF DAENERYS. */ public static final int ACCOUNT_OF_DAENERYS = 1; /** * The constant ACCOUNT OF JON. */ public static final int ACCOUNT_OF_JON = 2; /** * The entry point of application. * * @param args the input arguments */ public static void main(String[] args) { DomainEventProcessor eventProcessor = new DomainEventProcessor(); LOGGER.info("Running the system first time............"); eventProcessor.reset(); LOGGER.info("Creating th accounts............"); eventProcessor.process(new AccountCreateEvent( 0, new Date().getTime(), ACCOUNT_OF_DAENERYS, "Daenerys Targaryen")); eventProcessor.process(new AccountCreateEvent( 1, new Date().getTime(), ACCOUNT_OF_JON, "Jon Snow")); LOGGER.info("Do some money operations............"); eventProcessor.process(new MoneyDepositEvent( 2, new Date().getTime(), ACCOUNT_OF_DAENERYS, new BigDecimal("100000"))); eventProcessor.process(new MoneyDepositEvent( 3, new Date().getTime(), ACCOUNT_OF_JON, new BigDecimal("100"))); eventProcessor.process(new MoneyTransferEvent( 4, new Date().getTime(), new BigDecimal("10000"), ACCOUNT_OF_DAENERYS, ACCOUNT_OF_JON)); LOGGER.info("...............State:............"); LOGGER.info(AccountAggregate.getAccount(ACCOUNT_OF_DAENERYS).toString()); LOGGER.info(AccountAggregate.getAccount(ACCOUNT_OF_JON).toString()); LOGGER.info("At that point system had a shot down, state in memory is cleared............"); AccountAggregate.resetState(); LOGGER.info("Recover the system by the events in journal file............"); eventProcessor = new DomainEventProcessor(); eventProcessor.recover(); LOGGER.info("...............Recovered State:............"); LOGGER.info(AccountAggregate.getAccount(ACCOUNT_OF_DAENERYS).toString()); LOGGER.info(AccountAggregate.getAccount(ACCOUNT_OF_JON).toString()); } } java-design-patterns-1.18.0/event-sourcing/src/main/java/com/iluwatar/event/sourcing/domain/000077500000000000000000000000001322244523500320645ustar00rootroot00000000000000Account.java000066400000000000000000000117441322244523500342530ustar00rootroot00000000000000java-design-patterns-1.18.0/event-sourcing/src/main/java/com/iluwatar/event/sourcing/domain/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.sourcing.domain; import com.iluwatar.event.sourcing.event.AccountCreateEvent; import com.iluwatar.event.sourcing.event.MoneyDepositEvent; import com.iluwatar.event.sourcing.event.MoneyTransferEvent; import com.iluwatar.event.sourcing.state.AccountAggregate; import java.math.BigDecimal; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * This is the Account class that holds the account info, the account number, * account owner name and money of the account. Account class also have the business logic of events * that effects this account. * * Created by Serdar Hamzaogullari on 06.08.2017. */ public class Account { private static final Logger LOGGER = LoggerFactory.getLogger(Account.class); private final int accountNo; private final String owner; private BigDecimal money; /** * Instantiates a new Account. * * @param accountNo the account no * @param owner the owner */ public Account(int accountNo, String owner) { this.accountNo = accountNo; this.owner = owner; money = BigDecimal.ZERO; } /** * Gets account no. * * @return the account no */ public int getAccountNo() { return accountNo; } /** * Gets owner. * * @return the owner */ public String getOwner() { return owner; } /** * Gets money. * * @return the money */ public BigDecimal getMoney() { return money; } /** * Sets money. * * @param money the money */ public void setMoney(BigDecimal money) { this.money = money; } /** * Copy account. * * @return the account */ public Account copy() { Account account = new Account(accountNo, owner); account.setMoney(money); return account; } @Override public String toString() { return "Account{" + "accountNo=" + accountNo + ", owner='" + owner + '\'' + ", money=" + money + '}'; } private void depositMoney(BigDecimal money) { this.money = this.money.add(money); } private void withdrawMoney(BigDecimal money) { this.money = this.money.subtract(money); } private void handleDeposit(BigDecimal money, boolean realTime) { depositMoney(money); AccountAggregate.putAccount(this); if (realTime) { LOGGER.info("Some external api for only realtime execution could be called here."); } } private void handleWithdrawal(BigDecimal money, boolean realTime) { if (this.money.compareTo(money) == -1) { throw new RuntimeException("Insufficient Account Balance"); } withdrawMoney(money); AccountAggregate.putAccount(this); if (realTime) { LOGGER.info("Some external api for only realtime execution could be called here."); } } /** * Handles the MoneyDepositEvent. * * @param moneyDepositEvent the money deposit event */ public void handleEvent(MoneyDepositEvent moneyDepositEvent) { handleDeposit(moneyDepositEvent.getMoney(), moneyDepositEvent.isRealTime()); } /** * Handles the AccountCreateEvent. * * @param accountCreateEvent the account create event */ public void handleEvent(AccountCreateEvent accountCreateEvent) { AccountAggregate.putAccount(this); if (accountCreateEvent.isRealTime()) { LOGGER.info("Some external api for only realtime execution could be called here."); } } /** * Handles transfer from account event. * * @param moneyTransferEvent the money transfer event */ public void handleTransferFromEvent(MoneyTransferEvent moneyTransferEvent) { handleWithdrawal(moneyTransferEvent.getMoney(), moneyTransferEvent.isRealTime()); } /** * Handles transfer to account event. * * @param moneyTransferEvent the money transfer event */ public void handleTransferToEvent(MoneyTransferEvent moneyTransferEvent) { handleDeposit(moneyTransferEvent.getMoney(), moneyTransferEvent.isRealTime()); } } java-design-patterns-1.18.0/event-sourcing/src/main/java/com/iluwatar/event/sourcing/event/000077500000000000000000000000001322244523500317365ustar00rootroot00000000000000AccountCreateEvent.java000066400000000000000000000051451322244523500362510ustar00rootroot00000000000000java-design-patterns-1.18.0/event-sourcing/src/main/java/com/iluwatar/event/sourcing/event/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.sourcing.event; import com.iluwatar.event.sourcing.domain.Account; import com.iluwatar.event.sourcing.state.AccountAggregate; /** * This is the class that implements account create event. * Holds the necessary info for an account create event. * Implements the process function that finds the event related * domain objects and calls the related domain object's handle event functions * * Created by Serdar Hamzaogullari on 06.08.2017. */ public class AccountCreateEvent extends DomainEvent { private final int accountNo; private final String owner; /** * Instantiates a new Account create event. * * @param sequenceId the sequence id * @param createdTime the created time * @param accountNo the account no * @param owner the owner */ public AccountCreateEvent(long sequenceId, long createdTime, int accountNo, String owner) { super(sequenceId, createdTime, "AccountCreateEvent"); this.accountNo = accountNo; this.owner = owner; } /** * Gets account no. * * @return the account no */ public int getAccountNo() { return accountNo; } /** * Gets owner. * * @return the owner */ public String getOwner() { return owner; } @Override public void process() { Account account = AccountAggregate.getAccount(accountNo); if (account != null) { throw new RuntimeException("Account already exists"); } account = new Account(accountNo, owner); account.handleEvent(this); } } DomainEvent.java000066400000000000000000000052051322244523500347350ustar00rootroot00000000000000java-design-patterns-1.18.0/event-sourcing/src/main/java/com/iluwatar/event/sourcing/event/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.sourcing.event; import java.io.Serializable; /** * This is the base class for domain events. All events must extend this class. * * Created by Serdar Hamzaogullari on 06.08.2017. */ public abstract class DomainEvent implements Serializable { private final long sequenceId; private final long createdTime; private final String eventClassName; private boolean realTime = true; /** * Instantiates a new Domain event. * * @param sequenceId the sequence id * @param createdTime the created time * @param eventClassName the event class name */ public DomainEvent(long sequenceId, long createdTime, String eventClassName) { this.sequenceId = sequenceId; this.createdTime = createdTime; this.eventClassName = eventClassName; } /** * Gets sequence id. * * @return the sequence id */ public long getSequenceId() { return sequenceId; } /** * Gets created time. * * @return the created time */ public long getCreatedTime() { return createdTime; } /** * Is real time boolean. * * @return the boolean */ public boolean isRealTime() { return realTime; } /** * Sets real time. * * @param realTime the real time */ public void setRealTime(boolean realTime) { this.realTime = realTime; } /** * Process. */ public abstract void process(); /** * Gets event class name. * * @return the event class name */ public String getEventClassName() { return eventClassName; } } MoneyDepositEvent.java000066400000000000000000000051251322244523500361460ustar00rootroot00000000000000java-design-patterns-1.18.0/event-sourcing/src/main/java/com/iluwatar/event/sourcing/event/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.sourcing.event; import com.iluwatar.event.sourcing.domain.Account; import com.iluwatar.event.sourcing.state.AccountAggregate; import java.math.BigDecimal; /** * This is the class that implements money deposit event. * Holds the necessary info for a money deposit event. * Implements the process function that finds the event related * domain objects and calls the related domain object's handle event functions * * Created by Serdar Hamzaogullari on 06.08.2017. */ public class MoneyDepositEvent extends DomainEvent { private final BigDecimal money; private final int accountNo; /** * Instantiates a new Money deposit event. * * @param sequenceId the sequence id * @param createdTime the created time * @param accountNo the account no * @param money the money */ public MoneyDepositEvent(long sequenceId, long createdTime, int accountNo, BigDecimal money) { super(sequenceId, createdTime, "MoneyDepositEvent"); this.money = money; this.accountNo = accountNo; } /** * Gets money. * * @return the money */ public BigDecimal getMoney() { return money; } /** * Gets account no. * * @return the account no */ public int getAccountNo() { return accountNo; } @Override public void process() { Account account = AccountAggregate.getAccount(accountNo); if (account == null) { throw new RuntimeException("Account not found"); } account.handleEvent(this); } } MoneyTransferEvent.java000066400000000000000000000062761322244523500363330ustar00rootroot00000000000000java-design-patterns-1.18.0/event-sourcing/src/main/java/com/iluwatar/event/sourcing/event/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.sourcing.event; import com.iluwatar.event.sourcing.domain.Account; import com.iluwatar.event.sourcing.state.AccountAggregate; import java.math.BigDecimal; /** * This is the class that implements money transfer event. * Holds the necessary info for a money transfer event. * Implements the process function that finds the event related * domain objects and calls the related domain object's handle event functions * * Created by Serdar Hamzaogullari on 06.08.2017. */ public class MoneyTransferEvent extends DomainEvent { private final BigDecimal money; private final int accountNoFrom; private final int accountNoTo; /** * Instantiates a new Money transfer event. * * @param sequenceId the sequence id * @param createdTime the created time * @param money the money * @param accountNoFrom the account no from * @param accountNoTo the account no to */ public MoneyTransferEvent(long sequenceId, long createdTime, BigDecimal money, int accountNoFrom, int accountNoTo) { super(sequenceId, createdTime, "MoneyTransferEvent"); this.money = money; this.accountNoFrom = accountNoFrom; this.accountNoTo = accountNoTo; } /** * Gets money. * * @return the money */ public BigDecimal getMoney() { return money; } /** * Gets account no which the money comes from. * * @return the account no from */ public int getAccountNoFrom() { return accountNoFrom; } /** * Gets account no which the money goes to. * * @return the account no to */ public int getAccountNoTo() { return accountNoTo; } @Override public void process() { Account accountFrom = AccountAggregate.getAccount(accountNoFrom); if (accountFrom == null) { throw new RuntimeException("Account not found " + accountNoFrom); } Account accountTo = AccountAggregate.getAccount(accountNoTo); if (accountTo == null) { throw new RuntimeException("Account not found" + accountTo); } accountFrom.handleTransferFromEvent(this); accountTo.handleTransferToEvent(this); } } java-design-patterns-1.18.0/event-sourcing/src/main/java/com/iluwatar/event/sourcing/processor/000077500000000000000000000000001322244523500326345ustar00rootroot00000000000000DomainEventProcessor.java000066400000000000000000000041101322244523500375250ustar00rootroot00000000000000java-design-patterns-1.18.0/event-sourcing/src/main/java/com/iluwatar/event/sourcing/processor/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.sourcing.processor; import com.iluwatar.event.sourcing.event.DomainEvent; /** * This is the implementation of event processor. * All events are processed by this class. * This processor uses processorJournal to persist and recover events. * * Created by Serdar Hamzaogullari on 06.08.2017. */ public class DomainEventProcessor { private final JsonFileJournal processorJournal = new JsonFileJournal(); /** * Process. * * @param domainEvent the domain event */ public void process(DomainEvent domainEvent) { domainEvent.process(); processorJournal.write(domainEvent); } /** * Reset. */ public void reset() { processorJournal.reset(); } /** * Recover. */ public void recover() { DomainEvent domainEvent; while (true) { domainEvent = processorJournal.readNext(); if (domainEvent == null) { break; } else { domainEvent.process(); } } } } JsonFileJournal.java000066400000000000000000000112651322244523500364710ustar00rootroot00000000000000java-design-patterns-1.18.0/event-sourcing/src/main/java/com/iluwatar/event/sourcing/processor/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.sourcing.processor; import com.google.gson.Gson; import com.google.gson.JsonElement; import com.google.gson.JsonParser; import com.iluwatar.event.sourcing.event.AccountCreateEvent; import com.iluwatar.event.sourcing.event.DomainEvent; import com.iluwatar.event.sourcing.event.MoneyDepositEvent; import com.iluwatar.event.sourcing.event.MoneyTransferEvent; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.io.Writer; import java.util.ArrayList; import java.util.List; /** * This is the implementation of event journal. * This implementation serialize/deserialize the events with JSON * and writes/reads them on a Journal.json file at the working directory. * * Created by Serdar Hamzaogullari on 06.08.2017. */ public class JsonFileJournal { private final File aFile; private final List events = new ArrayList<>(); private int index = 0; /** * Instantiates a new Json file journal. */ public JsonFileJournal() { aFile = new File("Journal.json"); if (aFile.exists()) { try (BufferedReader input = new BufferedReader( new InputStreamReader(new FileInputStream(aFile), "UTF-8"))) { String line; while ((line = input.readLine()) != null) { events.add(line); } } catch (IOException e) { throw new RuntimeException(e); } } else { reset(); } } /** * Write. * * @param domainEvent the domain event */ public void write(DomainEvent domainEvent) { Gson gson = new Gson(); JsonElement jsonElement; if (domainEvent instanceof AccountCreateEvent) { jsonElement = gson.toJsonTree(domainEvent, AccountCreateEvent.class); } else if (domainEvent instanceof MoneyDepositEvent) { jsonElement = gson.toJsonTree(domainEvent, MoneyDepositEvent.class); } else if (domainEvent instanceof MoneyTransferEvent) { jsonElement = gson.toJsonTree(domainEvent, MoneyTransferEvent.class); } else { throw new RuntimeException("Journal Event not recegnized"); } try (Writer output = new BufferedWriter( new OutputStreamWriter(new FileOutputStream(aFile, true), "UTF-8"))) { String eventString = jsonElement.toString(); output.write(eventString + "\r\n"); } catch (IOException e) { throw new RuntimeException(e); } } /** * Reset. */ public void reset() { aFile.delete(); } /** * Read next domain event. * * @return the domain event */ public DomainEvent readNext() { if (index >= events.size()) { return null; } String event = events.get(index); index++; JsonParser parser = new JsonParser(); JsonElement jsonElement = parser.parse(event); String eventClassName = jsonElement.getAsJsonObject().get("eventClassName").getAsString(); Gson gson = new Gson(); DomainEvent domainEvent; if (eventClassName.equals("AccountCreateEvent")) { domainEvent = gson.fromJson(jsonElement, AccountCreateEvent.class); } else if (eventClassName.equals("MoneyDepositEvent")) { domainEvent = gson.fromJson(jsonElement, MoneyDepositEvent.class); } else if (eventClassName.equals("MoneyTransferEvent")) { domainEvent = gson.fromJson(jsonElement, MoneyTransferEvent.class); } else { throw new RuntimeException("Journal Event not recegnized"); } domainEvent.setRealTime(false); return domainEvent; } } java-design-patterns-1.18.0/event-sourcing/src/main/java/com/iluwatar/event/sourcing/state/000077500000000000000000000000001322244523500317355ustar00rootroot00000000000000AccountAggregate.java000066400000000000000000000041721322244523500357300ustar00rootroot00000000000000java-design-patterns-1.18.0/event-sourcing/src/main/java/com/iluwatar/event/sourcing/state/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.event.sourcing.state; import com.iluwatar.event.sourcing.domain.Account; import java.util.HashMap; import java.util.Map; /** * This is the static accounts map holder class. * This class holds the state of the accounts. * * Created by Serdar Hamzaogullari on 06.08.2017. */ public class AccountAggregate { private static Map accounts = new HashMap<>(); private AccountAggregate() { } /** * Put account. * * @param account the account */ public static void putAccount(Account account) { accounts.put(account.getAccountNo(), account); } /** * Gets account. * * @param accountNo the account no * @return the copy of the account or null if not found */ public static Account getAccount(int accountNo) { Account account = accounts.get(accountNo); if (account == null) { return null; } return account.copy(); } /** * Reset state. */ public static void resetState() { accounts = new HashMap<>(); } } java-design-patterns-1.18.0/event-sourcing/src/test/000077500000000000000000000000001322244523500223475ustar00rootroot00000000000000java-design-patterns-1.18.0/event-sourcing/src/test/java/000077500000000000000000000000001322244523500232705ustar00rootroot00000000000000java-design-patterns-1.18.0/event-sourcing/src/test/java/IntegrationTest.java000066400000000000000000000071171322244523500272640ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ import com.iluwatar.event.sourcing.domain.Account; import com.iluwatar.event.sourcing.event.AccountCreateEvent; import com.iluwatar.event.sourcing.event.MoneyDepositEvent; import com.iluwatar.event.sourcing.event.MoneyTransferEvent; import com.iluwatar.event.sourcing.processor.DomainEventProcessor; import com.iluwatar.event.sourcing.state.AccountAggregate; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import java.math.BigDecimal; import java.util.Date; import static com.iluwatar.event.sourcing.app.App.ACCOUNT_OF_DAENERYS; import static com.iluwatar.event.sourcing.app.App.ACCOUNT_OF_JON; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Intergartion Test for Event Sourcing state recovery * * Created by Serdar Hamzaogullari on 19.08.2017. */ public class IntegrationTest { /** * The Domain event processor. */ private DomainEventProcessor eventProcessor; /** * Initialize. */ @BeforeEach public void initialize() { eventProcessor = new DomainEventProcessor(); } /** * Test state recovery. */ @Test public void testStateRecovery() { eventProcessor.reset(); eventProcessor.process(new AccountCreateEvent( 0, new Date().getTime(), ACCOUNT_OF_DAENERYS, "Daenerys Targaryen")); eventProcessor.process(new AccountCreateEvent( 1, new Date().getTime(), ACCOUNT_OF_JON, "Jon Snow")); eventProcessor.process(new MoneyDepositEvent( 2, new Date().getTime(), ACCOUNT_OF_DAENERYS, new BigDecimal("100000"))); eventProcessor.process(new MoneyDepositEvent( 3, new Date().getTime(), ACCOUNT_OF_JON, new BigDecimal("100"))); eventProcessor.process(new MoneyTransferEvent( 4, new Date().getTime(), new BigDecimal("10000"), ACCOUNT_OF_DAENERYS, ACCOUNT_OF_JON)); Account accountOfDaenerysBeforeShotDown = AccountAggregate.getAccount(ACCOUNT_OF_DAENERYS); Account accountOfJonBeforeShotDown = AccountAggregate.getAccount(ACCOUNT_OF_JON); AccountAggregate.resetState(); eventProcessor = new DomainEventProcessor(); eventProcessor.recover(); Account accountOfDaenerysAfterShotDown = AccountAggregate.getAccount(ACCOUNT_OF_DAENERYS); Account accountOfJonAfterShotDown = AccountAggregate.getAccount(ACCOUNT_OF_JON); assertEquals(accountOfDaenerysBeforeShotDown.getMoney(), accountOfDaenerysAfterShotDown.getMoney()); assertEquals(accountOfJonBeforeShotDown.getMoney(), accountOfJonAfterShotDown.getMoney()); } }java-design-patterns-1.18.0/exclude-pmd.properties000066400000000000000000000025071322244523500221620ustar00rootroot00000000000000# # The MIT License # Copyright (c) 2014-2016 Ilkka Seppälä # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. # com.iluwatar.servicelayer.common.BaseEntity=UnusedPrivateField com.iluwatar.doublechecked.locking.App=EmptyStatementNotInLoop,EmptyWhileStmt com.iluwatar.doublechecked.locking.InventoryTest=EmptyStatementNotInLoop,EmptyWhileStmt java-design-patterns-1.18.0/execute-around/000077500000000000000000000000001322244523500205615ustar00rootroot00000000000000java-design-patterns-1.18.0/execute-around/README.md000066400000000000000000000015131322244523500220400ustar00rootroot00000000000000--- layout: pattern title: Execute Around folder: execute-around permalink: /patterns/execute-around/ categories: Other tags: - Java - Difficulty-Beginner - Idiom --- ## Intent Execute Around idiom frees the user from certain actions that should always be executed before and after the business method. A good example of this is resource allocation and deallocation leaving the user to specify only what to do with the resource. ![alt text](./etc/execute-around.png "Execute Around") ## Applicability Use the Execute Around idiom when * you use an API that requires methods to be called in pairs such as open/close or allocate/deallocate. ## Credits * [Functional Programming in Java: Harnessing the Power of Java 8 Lambda Expressions](http://www.amazon.com/Functional-Programming-Java-Harnessing-Expressions/dp/1937785467/ref=sr_1_1) java-design-patterns-1.18.0/execute-around/etc/000077500000000000000000000000001322244523500213345ustar00rootroot00000000000000java-design-patterns-1.18.0/execute-around/etc/execute-around.png000066400000000000000000000107541322244523500250010ustar00rootroot00000000000000PNG  IHDR^.2IDATx'i@_1}W5u4Ac[.KEº1^D`h:̞{̙Ι33mQ u # BQհOXv T>j . \ \pa7patAy΂Xͨ7 73V]5v / ssl֍ cf3bpׁ wՅ;T0[EOj,k4cglL[rڲsye!, $ ]*.dʾё/!T V3$pB-5coH$;t{< +UtBb/怓fpe%"HVou^bFl\BW Q)\W<[$Kl,,KMsmHt3QFtX!Jp/țsa|ۤ塴3kGZ#Rg@1.G2m_ق9) ˅H]Ȱbq7ޯ|خr-FHgXqX߻p;}c׍vbH3ﶔ`jF[XCu\n6-mT 3Hpdjl MGivDm(@i4 }'\Xx; pa ȁWW]bsJ xM@L6)%.yG0|cWzBʳNAX5s "2MXʯ6B2Gu]8uWޑPGVw$z:ѿ. \pa7patAy@\ \pa7patAT߅/_lyό;2)|@Y( u;^dfg,2wቓ0r`˳&naM[ 5LbFS!Nn L2|Mk]'ε4;rlqgxFݠj5 s#ƚG+47yrct$)-tove]xk{#zW>_zzǁdҭR q}ml7_x9U|/_P|y/7qnl{j4LI4ҹέ6zƞt:0&?mN^Ҽ_7<܇ߜHPunTՅL/sa?;>xd]^sŻ4t#!,ɹpXDSq} |pZ7"rwu+CG47?H]݈V6,gKM;8Y>, *)-^Q1Iv+᭳QU5qu̙t?RW^Q99Rn87"< .ڹ?2~z ;Ͼ 2qo\d7wr΢$ z=yշoG6Q;Oݣ9q*y1¬;2txټKj{NVӇeˎ /'4ځoB&'܅MUjX\go?l#:{4믖+L::wԺ! ˏ N S9{xEz)CjhN^GW?42t`fǖY ctSkS`po2v=5V)|ξu?cտݣW jPp_'6 ] )&n!E<\8mHV ?_ݴwqo? Y;2~D &v_|)^H(V!q͆9smd=Nl~v-߶{Gد3a;qሬ}d̄Q~o5J~&Q;NWýϼlCwĆsUK_]p"+M2\Оy4ێcڍsLXݣ/[f1 rdG"ƛji++Q7)p;NTCf=nt-bJ?ޓrT7'iějؙ*mk]+oܶ'K.#ꔀ.ܶǑxvU? fw=qH&w" W0( p< W00: o . . 00: o zv/e[Ȟ Ǟ./=\8acD/5Ӭ72MnP%d)o,Oncc%qDW;Vo |Z \q l!ݡF^ku,9ZC1N{+k m .i .-/so7 h)˸#}'[FU(_r޸\1dwdyU׍GSN+컥1p jؒ&nɓv - ni .ቁuRC:Ȓʑfͨ(MbD커1pLb?,Qc YLmGGyCW؃= nh . \ \pa7patAy@\ \pa7joBjGj maD A@\ \pa7patAި]sy<@0=h . & =6~yօo|e㿓c y Hd\MN.;w3W~7͉vukV?lWexUBU)%oYQ˙_RS]8~YS+0\I VOXf=|).`edAkXT_u(NwkC*9TJn&Wֱ4wጄx/T\xݫ;9~5ώ\|)Ӆ_(Ԓpi3<gL$ѳ.Wâ#A 0DIȅox?캰-l4ߠ6ݘ-&0:w.\U<}Lm=D?O֔ʻl_KVUVBF1ik6Ƃ#Us[pIGyc˥v2bԐ.!M L\-;'(I20P+Bn߼rX=^Yۻ=vY?6bx.2vbܽ fv,=;֯NѦ $7oY4&4L$!<3ʅPJ|$|%3IJ;WH rHS sѬjJqv+G}i}ʪpZa2SV.MmvinfHebb,=62wnɆ^*U4&NDZod+{lT s+4z4ǢITf4TCRUC A M)m%;;)Ce_"T=(. Wf̃6_/T& W8pp'E3$$Pz \uiRU̍Z U,$:BOq+ ŅUC³OX³ӹr(CTA2嚅 N?vî۷zj|۩qp%S a[8([v6F:&!F{Dܲdy - Fv6]9]8V5tZ&i۬ND߃" W{!wt-j;w:߲ ZOT}C\vx S$Pxm:F?RZ[^ȲR8G_x3BAa8W dNd.\lU WrwV<"4:k 7g\Z)"#`wpbro}ϫh],@6B^6⟰Gٌ,slńא.>vH ꧽ*BQ|vđcc|!J@b+F7Xfp3% f"-GG; r}ndp1.hy#t java-design-patterns-1.18.0/execute-around/pom.xml000066400000000000000000000041211322244523500220740ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 execute-around org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.junit.jupiter junit-jupiter-migrationsupport test java-design-patterns-1.18.0/execute-around/src/000077500000000000000000000000001322244523500213505ustar00rootroot00000000000000java-design-patterns-1.18.0/execute-around/src/main/000077500000000000000000000000001322244523500222745ustar00rootroot00000000000000java-design-patterns-1.18.0/execute-around/src/main/java/000077500000000000000000000000001322244523500232155ustar00rootroot00000000000000java-design-patterns-1.18.0/execute-around/src/main/java/com/000077500000000000000000000000001322244523500237735ustar00rootroot00000000000000java-design-patterns-1.18.0/execute-around/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500256235ustar00rootroot00000000000000java-design-patterns-1.18.0/execute-around/src/main/java/com/iluwatar/execute/000077500000000000000000000000001322244523500272655ustar00rootroot00000000000000java-design-patterns-1.18.0/execute-around/src/main/java/com/iluwatar/execute/around/000077500000000000000000000000001322244523500305555ustar00rootroot00000000000000java-design-patterns-1.18.0/execute-around/src/main/java/com/iluwatar/execute/around/App.java000066400000000000000000000040671322244523500321470ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.execute.around; import java.io.FileWriter; import java.io.IOException; /** * The Execute Around idiom specifies some code to be executed before and after a method. Typically * the idiom is used when the API has methods to be executed in pairs, such as resource * allocation/deallocation or lock acquisition/release. *

* In this example, we have {@link SimpleFileWriter} class that opens and closes the file for the * user. The user specifies only what to do with the file by providing the {@link FileWriterAction} * implementation. * */ public class App { /** * Program entry point */ public static void main(String[] args) throws IOException { new SimpleFileWriter("testfile.txt", new FileWriterAction() { @Override public void writeFile(FileWriter writer) throws IOException { writer.write("Hello"); writer.append(" "); writer.append("there!"); } }); } } FileWriterAction.java000066400000000000000000000026051322244523500345560ustar00rootroot00000000000000java-design-patterns-1.18.0/execute-around/src/main/java/com/iluwatar/execute/around/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.execute.around; import java.io.FileWriter; import java.io.IOException; /** * * Interface for specifying what to do with the file resource. * */ public interface FileWriterAction { void writeFile(FileWriter writer) throws IOException; } SimpleFileWriter.java000066400000000000000000000032741322244523500345750ustar00rootroot00000000000000java-design-patterns-1.18.0/execute-around/src/main/java/com/iluwatar/execute/around/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.execute.around; import java.io.FileWriter; import java.io.IOException; /** * * SimpleFileWriter handles opening and closing file for the user. The user only has to specify what * to do with the file resource through {@link FileWriterAction} parameter. * */ public class SimpleFileWriter { /** * Constructor */ public SimpleFileWriter(String filename, FileWriterAction action) throws IOException { FileWriter writer = new FileWriter(filename); try { action.writeFile(writer); } finally { writer.close(); } } } java-design-patterns-1.18.0/execute-around/src/test/000077500000000000000000000000001322244523500223275ustar00rootroot00000000000000java-design-patterns-1.18.0/execute-around/src/test/java/000077500000000000000000000000001322244523500232505ustar00rootroot00000000000000java-design-patterns-1.18.0/execute-around/src/test/java/com/000077500000000000000000000000001322244523500240265ustar00rootroot00000000000000java-design-patterns-1.18.0/execute-around/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500256565ustar00rootroot00000000000000java-design-patterns-1.18.0/execute-around/src/test/java/com/iluwatar/execute/000077500000000000000000000000001322244523500273205ustar00rootroot00000000000000java-design-patterns-1.18.0/execute-around/src/test/java/com/iluwatar/execute/around/000077500000000000000000000000001322244523500306105ustar00rootroot00000000000000java-design-patterns-1.18.0/execute-around/src/test/java/com/iluwatar/execute/around/AppTest.java000066400000000000000000000031511322244523500330330ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.execute.around; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import java.io.File; import java.io.IOException; /** * * Tests execute-around example. * */ public class AppTest { @Test public void test() throws IOException { String[] args = {}; App.main(args); } @BeforeEach @AfterEach public void cleanup() { File file = new File("testfile.txt"); file.delete(); } } SimpleFileWriterTest.java000066400000000000000000000066151322244523500354720ustar00rootroot00000000000000java-design-patterns-1.18.0/execute-around/src/test/java/com/iluwatar/execute/around/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.execute.around; import org.junit.Rule; import org.junit.jupiter.api.Assertions; import org.junit.jupiter.api.Test; import org.junit.jupiter.migrationsupport.rules.EnableRuleMigrationSupport; import org.junit.rules.TemporaryFolder; import java.io.File; import java.io.IOException; import java.nio.file.Files; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertThrows; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Date: 12/12/15 - 3:21 PM * * @author Jeroen Meulemeester */ @EnableRuleMigrationSupport public class SimpleFileWriterTest { /** * Create a temporary folder, used to generate files in during this test */ @Rule public final TemporaryFolder testFolder = new TemporaryFolder(); /** * Verify if the given writer is not 'null' */ @Test public void testWriterNotNull() throws Exception { final File temporaryFile = this.testFolder.newFile(); new SimpleFileWriter(temporaryFile.getPath(), Assertions::assertNotNull); } /** * Test if the {@link SimpleFileWriter} creates a file if it doesn't exist */ @Test public void testNonExistentFile() throws Exception { final File nonExistingFile = new File(this.testFolder.getRoot(), "non-existing-file"); assertFalse(nonExistingFile.exists()); new SimpleFileWriter(nonExistingFile.getPath(), Assertions::assertNotNull); assertTrue(nonExistingFile.exists()); } /** * Test if the data written to the file writer actually gets in the file */ @Test public void testActualWrite() throws Exception { final String testMessage = "Test message"; final File temporaryFile = this.testFolder.newFile(); assertTrue(temporaryFile.exists()); new SimpleFileWriter(temporaryFile.getPath(), writer -> writer.write(testMessage)); assertTrue(Files.lines(temporaryFile.toPath()).allMatch(testMessage::equals)); } /** * Verify if an {@link IOException} during the write ripples through */ @Test public void testIoException() throws Exception { assertThrows(IOException.class, () -> { final File temporaryFile = this.testFolder.newFile(); new SimpleFileWriter(temporaryFile.getPath(), writer -> { throw new IOException(""); }); }); } } java-design-patterns-1.18.0/extension-objects/000077500000000000000000000000001322244523500212745ustar00rootroot00000000000000java-design-patterns-1.18.0/extension-objects/README.md000066400000000000000000000023571322244523500225620ustar00rootroot00000000000000--- layout: pattern title: Extension objects folder: extension-objects permalink: /patterns/extension-objects/ categories: Behavioral tags: - Java - Difficulty-Intermediate --- ## Intent Anticipate that an object’s interface needs to be extended in the future. Additional interfaces are defined by extension objects. ![Extension_objects](./etc/extension_obj.png "Extension objects") ## Applicability Use the Extension Objects pattern when: * you need to support the addition of new or unforeseen interfaces to existing classes and you don't want to impact clients that don't need this new interface. Extension Objects lets you keep related operations together by defining them in a separate class * a class representing a key abstraction plays different roles for different clients. The number of roles the class can play should be open-ended. There is a need to preserve the key abstraction itself. For example, a customer object is still a customer object even if different subsystems view it differently. * a class should be extensible with new behavior without subclassing from it. ## Real world examples * [OpenDoc](https://en.wikipedia.org/wiki/OpenDoc) * [Object Linking and Embedding](https://en.wikipedia.org/wiki/Object_Linking_and_Embedding) java-design-patterns-1.18.0/extension-objects/etc/000077500000000000000000000000001322244523500220475ustar00rootroot00000000000000java-design-patterns-1.18.0/extension-objects/etc/extension_obj.png000066400000000000000000001122021322244523500254210ustar00rootroot00000000000000PNG  IHDR\ `@IIDATx}l}@ 7NX<LkmQj"Iy#W& mڑQ`^[ cG"##R6m兹v*ZmʰuBP55p s[0?>3gf˙3~ gϜ93_ O)(YHz|(J|KGA@7B-0 h D!L}(QS @&m@ǩk:mH!ZT290B-I[LP[*st!DaH(QإJ.e akD20Ͳc8_cQk0Q9 ESVrc@[ #Z>RoLQTa zvyI hA7f8{(Q:jfs?~D )0}-\q'W3> C8kؙ{(Q4ٽvK!b >#w,cxR[Z GJ?B0 4f6k4:F2*v8iM#!S5ѥKŽwе$(6M+ @7B-0 h D!L}(QS @7B-0 h Dav-Ou8)$T)f@[ s]ΌF[vRxiS @ff>vs?w.Ǐ;rx]/Om>v}t\ZF+Am(._Yo9tW\ϫNl;BF+Am(n~|춧:7yͥ]<~h7/>dDF`tsgF0[ 9xNE4B-}g=yiA;'b7~2wt6cDӽf\1Z Am(ƶNŸs?6N~ڣ;۵uF#r(4R2р(D!ll̾OL:tf~n6=LvgW΍ԿqHBcN DaAm(ƾ|жcwk__xBRslO' h Da6vnm<3a?Wq~kbݘXC0 @ffϟbS.&! b_6[(Qw޾OiB܊֝Am(._Y;wo_qQAm(o@[ aD!BQAm(o@[ b$b# @,i @cLZtu:}vgWw0QPBC𱏴'4 @c^Qhw7FSaM<D!ByM%Ql) @Jdf_e_C [g!S @7‚Ųi(o%bY 0 5_A@قB lAtD!L}CWP k+([5ݐAsU@ѡG.O)(dރF}@H)|cBwlsD!-0 5_ASjPnGD!L}CW|ʖJNY ˼o!=drPu- XkF5s۸fl}ZKh.^8sV k(o l) Ya zv (,R(ӡ,-EJ{Vʍ^f=u5 aj-59bg 5[uy0cХ!CcU޳q{6"k@7|Bwn)4d-8v(wrX{EvB!~s(j\+)l(!i&BN T*pqڊV!C.`Q(}ܴ>+-czݨ ֘M%!>M-hB%/#\f,20 5_Alѐ5<s uhJްB[G_#}Ahh+ƈeV@:Qv^^ЫհW|NS Ì6[f^Tr]eo='XV[.vDCcWu]QEwEBQc=e<&X? 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P(Ef gPՓ}&l>S~f?Ƭ*Mx]z~tQ3F(La` h @)2SHz}ݑ'Ϗ}h㾻[fc&fJkk1y,;w?o| IS4mxoS@C TJ0^l^id?$M=4'BbP(%֑7LIPRw ZO0PʒL!%L!1AS)L!1AS)L!1AS)L!1AS)L!1Av?]ri_BS` ["4IENDB`java-design-patterns-1.18.0/extension-objects/etc/extension_obj.ucls000066400000000000000000000246651322244523500256220ustar00rootroot00000000000000 java-design-patterns-1.18.0/extension-objects/pom.xml000066400000000000000000000037121322244523500226140ustar00rootroot00000000000000 java-design-patterns com.iluwatar 1.18.0 4.0.0 extension-objects org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/extension-objects/src/000077500000000000000000000000001322244523500220635ustar00rootroot00000000000000java-design-patterns-1.18.0/extension-objects/src/main/000077500000000000000000000000001322244523500230075ustar00rootroot00000000000000java-design-patterns-1.18.0/extension-objects/src/main/java/000077500000000000000000000000001322244523500237305ustar00rootroot00000000000000java-design-patterns-1.18.0/extension-objects/src/main/java/App.java000066400000000000000000000060221322244523500253130ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ import abstractextensions.CommanderExtension; import abstractextensions.SergeantExtension; import abstractextensions.SoldierExtension; import units.CommanderUnit; import units.SergeantUnit; import units.SoldierUnit; import units.Unit; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Anticipate that an object’s interface needs to be extended in the future. * Additional interfaces are defined by extension objects. */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { //Create 3 different units Unit soldierUnit = new SoldierUnit("SoldierUnit1"); Unit sergeantUnit = new SergeantUnit("SergeantUnit1"); Unit commanderUnit = new CommanderUnit("CommanderUnit1"); //check for each unit to have an extension checkExtensionsForUnit(soldierUnit); checkExtensionsForUnit(sergeantUnit); checkExtensionsForUnit(commanderUnit); } private static void checkExtensionsForUnit(Unit unit) { final Logger logger = LoggerFactory.getLogger(App.class); SoldierExtension soldierExtension = (SoldierExtension) unit.getUnitExtension("SoldierExtension"); SergeantExtension sergeantExtension = (SergeantExtension) unit.getUnitExtension("SergeantExtension"); CommanderExtension commanderExtension = (CommanderExtension) unit.getUnitExtension("CommanderExtension"); //if unit have extension call the method if (soldierExtension != null) { soldierExtension.soldierReady(); } else { logger.info(unit.getName() + " without SoldierExtension"); } if (sergeantExtension != null) { sergeantExtension.sergeantReady(); } else { logger.info(unit.getName() + " without SergeantExtension"); } if (commanderExtension != null) { commanderExtension.commanderReady(); } else { logger.info(unit.getName() + " without CommanderExtension"); } } } java-design-patterns-1.18.0/extension-objects/src/main/java/abstractextensions/000077500000000000000000000000001322244523500276535ustar00rootroot00000000000000CommanderExtension.java000066400000000000000000000024201322244523500342370ustar00rootroot00000000000000java-design-patterns-1.18.0/extension-objects/src/main/java/abstractextensions/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package abstractextensions; /** * Interface with their method */ public interface CommanderExtension extends UnitExtension { void commanderReady(); } SergeantExtension.java000066400000000000000000000024161322244523500341070ustar00rootroot00000000000000java-design-patterns-1.18.0/extension-objects/src/main/java/abstractextensions/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package abstractextensions; /** * Interface with their method */ public interface SergeantExtension extends UnitExtension { void sergeantReady(); } java-design-patterns-1.18.0/extension-objects/src/main/java/abstractextensions/SoldierExtension.java000066400000000000000000000024131322244523500340140ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package abstractextensions; /** * Interface with their method */ public interface SoldierExtension extends UnitExtension { void soldierReady(); } java-design-patterns-1.18.0/extension-objects/src/main/java/abstractextensions/UnitExtension.java000066400000000000000000000023531322244523500333350ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package abstractextensions; /** * Other Extensions will extend this interface */ public interface UnitExtension { } java-design-patterns-1.18.0/extension-objects/src/main/java/concreteextensions/000077500000000000000000000000001322244523500276525ustar00rootroot00000000000000java-design-patterns-1.18.0/extension-objects/src/main/java/concreteextensions/Commander.java000066400000000000000000000032351322244523500324250ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package concreteextensions; import abstractextensions.CommanderExtension; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import units.CommanderUnit; /** * Class defining Commander */ public class Commander implements CommanderExtension { private CommanderUnit unit; public Commander(CommanderUnit commanderUnit) { this.unit = commanderUnit; } final Logger logger = LoggerFactory.getLogger(Commander.class); @Override public void commanderReady() { logger.info("[Commander] " + unit.getName() + " is ready!"); } } java-design-patterns-1.18.0/extension-objects/src/main/java/concreteextensions/Sergeant.java000066400000000000000000000032211322244523500322630ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package concreteextensions; import abstractextensions.SergeantExtension; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import units.SergeantUnit; /** * Class defining Sergeant */ public class Sergeant implements SergeantExtension { private SergeantUnit unit; public Sergeant(SergeantUnit sergeantUnit) { this.unit = sergeantUnit; } final Logger logger = LoggerFactory.getLogger(Sergeant.class); @Override public void sergeantReady() { logger.info("[Sergeant] " + unit.getName() + " is ready! "); } } java-design-patterns-1.18.0/extension-objects/src/main/java/concreteextensions/Soldier.java000066400000000000000000000032041322244523500321150ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package concreteextensions; import abstractextensions.SoldierExtension; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import units.SoldierUnit; /** * Class defining Soldier */ public class Soldier implements SoldierExtension { private SoldierUnit unit; public Soldier(SoldierUnit soldierUnit) { this.unit = soldierUnit; } final Logger logger = LoggerFactory.getLogger(Soldier.class); @Override public void soldierReady() { logger.info("[Solider] " + unit.getName() + " is ready!"); } } java-design-patterns-1.18.0/extension-objects/src/main/java/units/000077500000000000000000000000001322244523500250725ustar00rootroot00000000000000java-design-patterns-1.18.0/extension-objects/src/main/java/units/CommanderUnit.java000066400000000000000000000032301322244523500305000ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package units; import abstractextensions.UnitExtension; import concreteextensions.Commander; /** * Class defining CommanderUnit */ public class CommanderUnit extends Unit { public CommanderUnit(String name) { super(name); } @Override public UnitExtension getUnitExtension(String extensionName) { if (extensionName.equals("CommanderExtension")) { if (unitExtension == null) { unitExtension = new Commander(this); } return unitExtension; } return super.getUnitExtension(extensionName); } } java-design-patterns-1.18.0/extension-objects/src/main/java/units/SergeantUnit.java000066400000000000000000000032221322244523500303440ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package units; import abstractextensions.UnitExtension; import concreteextensions.Sergeant; /** * Class defining SergeantUnit */ public class SergeantUnit extends Unit { public SergeantUnit(String name) { super(name); } @Override public UnitExtension getUnitExtension(String extensionName) { if (extensionName.equals("SergeantExtension")) { if (unitExtension == null) { unitExtension = new Sergeant(this); } return unitExtension; } return super.getUnitExtension(extensionName); } } java-design-patterns-1.18.0/extension-objects/src/main/java/units/SoldierUnit.java000066400000000000000000000032141322244523500301760ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package units; import abstractextensions.UnitExtension; import concreteextensions.Soldier; /** * Class defining SoldierUnit */ public class SoldierUnit extends Unit { public SoldierUnit(String name) { super(name); } @Override public UnitExtension getUnitExtension(String extensionName) { if (extensionName.equals("SoldierExtension")) { if (unitExtension == null) { unitExtension = new Soldier(this); } return unitExtension; } return super.getUnitExtension(extensionName); } } java-design-patterns-1.18.0/extension-objects/src/main/java/units/Unit.java000066400000000000000000000031171322244523500266560ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package units; import abstractextensions.UnitExtension; /** * Class defining Unit, other units will extend this class */ public class Unit { private String name; protected UnitExtension unitExtension = null; public Unit(String name) { this.name = name; } public String getName() { return name; } public void setName(String name) { this.name = name; } public UnitExtension getUnitExtension(String extensionName) { return null; } } java-design-patterns-1.18.0/extension-objects/src/test/000077500000000000000000000000001322244523500230425ustar00rootroot00000000000000java-design-patterns-1.18.0/extension-objects/src/test/java/000077500000000000000000000000001322244523500237635ustar00rootroot00000000000000java-design-patterns-1.18.0/extension-objects/src/test/java/AppTest.java000066400000000000000000000024761322244523500262170ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ import org.junit.jupiter.api.Test; /** * Created by Srdjan on 03-May-17. */ public class AppTest { @Test public void main() throws Exception { String[] args = {}; App.main(args); } }java-design-patterns-1.18.0/extension-objects/src/test/java/concreteextensions/000077500000000000000000000000001322244523500277055ustar00rootroot00000000000000java-design-patterns-1.18.0/extension-objects/src/test/java/concreteextensions/CommanderTest.java000066400000000000000000000027211322244523500333170ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package concreteextensions; import org.junit.jupiter.api.Test; import units.CommanderUnit; /** * Created by Srdjan on 03-May-17. */ public class CommanderTest { @Test public void commanderReady() throws Exception { final Commander commander = new Commander(new CommanderUnit("CommanderUnitTest")); commander.commanderReady(); } }java-design-patterns-1.18.0/extension-objects/src/test/java/concreteextensions/SergeantTest.java000066400000000000000000000027071322244523500331660ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package concreteextensions; import org.junit.jupiter.api.Test; import units.SergeantUnit; /** * Created by Srdjan on 03-May-17. */ public class SergeantTest { @Test public void sergeantReady() throws Exception { final Sergeant sergeant = new Sergeant(new SergeantUnit("SergeantUnitTest")); sergeant.sergeantReady(); } }java-design-patterns-1.18.0/extension-objects/src/test/java/concreteextensions/SoldierTest.java000066400000000000000000000026751322244523500330230ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package concreteextensions; import org.junit.jupiter.api.Test; import units.SoldierUnit; /** * Created by Srdjan on 03-May-17. */ public class SoldierTest { @Test public void soldierReady() throws Exception { final Soldier soldier = new Soldier(new SoldierUnit("SoldierUnitTest")); soldier.soldierReady(); } }java-design-patterns-1.18.0/extension-objects/src/test/java/units/000077500000000000000000000000001322244523500251255ustar00rootroot00000000000000java-design-patterns-1.18.0/extension-objects/src/test/java/units/CommanderUnitTest.java000066400000000000000000000033521322244523500314000ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package units; import abstractextensions.CommanderExtension; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertNull; /** * Created by Srdjan on 03-May-17. */ public class CommanderUnitTest { @Test public void getUnitExtension() throws Exception { final Unit unit = new CommanderUnit("CommanderUnitName"); assertNull(unit.getUnitExtension("SoldierExtension")); assertNull(unit.getUnitExtension("SergeantExtension")); assertNotNull((CommanderExtension) unit.getUnitExtension("CommanderExtension")); } }java-design-patterns-1.18.0/extension-objects/src/test/java/units/SergeantUnitTest.java000066400000000000000000000033451322244523500312450ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package units; import abstractextensions.SergeantExtension; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertNull; /** * Created by Srdjan on 03-May-17. */ public class SergeantUnitTest { @Test public void getUnitExtension() throws Exception { final Unit unit = new SergeantUnit("SergeantUnitName"); assertNull(unit.getUnitExtension("SoldierExtension")); assertNotNull((SergeantExtension) unit.getUnitExtension("SergeantExtension")); assertNull(unit.getUnitExtension("CommanderExtension")); } }java-design-patterns-1.18.0/extension-objects/src/test/java/units/SoldierUnitTest.java000066400000000000000000000033421322244523500310730ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package units; import abstractextensions.SoldierExtension; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertNull; /** * Created by Srdjan on 03-May-17. */ public class SoldierUnitTest { @Test public void getUnitExtension() throws Exception { final Unit unit = new SoldierUnit("SoldierUnitName"); assertNotNull((SoldierExtension) unit.getUnitExtension("SoldierExtension")); assertNull(unit.getUnitExtension("SergeantExtension")); assertNull(unit.getUnitExtension("CommanderExtension")); } }java-design-patterns-1.18.0/extension-objects/src/test/java/units/UnitTest.java000066400000000000000000000035461322244523500275570ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package units; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNull; /** * Created by Srdjan on 03-May-17. */ public class UnitTest { @Test public void testConstGetSet() throws Exception { final String name = "testName"; final Unit unit = new Unit(name); assertEquals(name, unit.getName()); final String newName = "newName"; unit.setName(newName); assertEquals(newName, unit.getName()); assertNull(unit.getUnitExtension("")); assertNull(unit.getUnitExtension("SoldierExtension")); assertNull(unit.getUnitExtension("SergeantExtension")); assertNull(unit.getUnitExtension("CommanderExtension")); } }java-design-patterns-1.18.0/facade/000077500000000000000000000000001322244523500170345ustar00rootroot00000000000000java-design-patterns-1.18.0/facade/README.md000066400000000000000000000135131322244523500203160ustar00rootroot00000000000000--- layout: pattern title: Facade folder: facade permalink: /patterns/facade/ categories: Structural tags: - Java - Gang Of Four - Difficulty-Beginner --- ## Intent Provide a unified interface to a set of interfaces in a subsystem. Facade defines a higher-level interface that makes the subsystem easier to use. ## Explanation Real world example > How does a goldmine work? "Well, the miners go down there and dig gold!" you say. That is what you believe because you are using a simple interface that goldmine provides on the outside, internally it has to do a lot of stuff to make it happen. This simple interface to the complex subsystem is a facade. In plain words > Facade pattern provides a simplified interface to a complex subsystem. Wikipedia says > A facade is an object that provides a simplified interface to a larger body of code, such as a class library. **Programmatic Example** Taking our goldmine example from above. Here we have the dwarven mine worker hierarchy ``` public abstract class DwarvenMineWorker { private static final Logger LOGGER = LoggerFactory.getLogger(DwarvenMineWorker.class); public void goToSleep() { LOGGER.info("{} goes to sleep.", name()); } public void wakeUp() { LOGGER.info("{} wakes up.", name()); } public void goHome() { LOGGER.info("{} goes home.", name()); } public void goToMine() { LOGGER.info("{} goes to the mine.", name()); } private void action(Action action) { switch (action) { case GO_TO_SLEEP: goToSleep(); break; case WAKE_UP: wakeUp(); break; case GO_HOME: goHome(); break; case GO_TO_MINE: goToMine(); break; case WORK: work(); break; default: LOGGER.info("Undefined action"); break; } } public void action(Action... actions) { for (Action action : actions) { action(action); } } public abstract void work(); public abstract String name(); static enum Action { GO_TO_SLEEP, WAKE_UP, GO_HOME, GO_TO_MINE, WORK } } public class DwarvenTunnelDigger extends DwarvenMineWorker { private static final Logger LOGGER = LoggerFactory.getLogger(DwarvenTunnelDigger.class); @Override public void work() { LOGGER.info("{} creates another promising tunnel.", name()); } @Override public String name() { return "Dwarven tunnel digger"; } } public class DwarvenGoldDigger extends DwarvenMineWorker { private static final Logger LOGGER = LoggerFactory.getLogger(DwarvenGoldDigger.class); @Override public void work() { LOGGER.info("{} digs for gold.", name()); } @Override public String name() { return "Dwarf gold digger"; } } public class DwarvenCartOperator extends DwarvenMineWorker { private static final Logger LOGGER = LoggerFactory.getLogger(DwarvenCartOperator.class); @Override public void work() { LOGGER.info("{} moves gold chunks out of the mine.", name()); } @Override public String name() { return "Dwarf cart operator"; } } ``` To operate all these goldmine workers we have the facade ``` public class DwarvenGoldmineFacade { private final List workers; public DwarvenGoldmineFacade() { workers = new ArrayList<>(); workers.add(new DwarvenGoldDigger()); workers.add(new DwarvenCartOperator()); workers.add(new DwarvenTunnelDigger()); } public void startNewDay() { makeActions(workers, DwarvenMineWorker.Action.WAKE_UP, DwarvenMineWorker.Action.GO_TO_MINE); } public void digOutGold() { makeActions(workers, DwarvenMineWorker.Action.WORK); } public void endDay() { makeActions(workers, DwarvenMineWorker.Action.GO_HOME, DwarvenMineWorker.Action.GO_TO_SLEEP); } private static void makeActions(Collection workers, DwarvenMineWorker.Action... actions) { for (DwarvenMineWorker worker : workers) { worker.action(actions); } } } ``` Now to use the facade ``` DwarvenGoldmineFacade facade = new DwarvenGoldmineFacade(); facade.startNewDay(); // Dwarf gold digger wakes up. // Dwarf gold digger goes to the mine. // Dwarf cart operator wakes up. // Dwarf cart operator goes to the mine. // Dwarven tunnel digger wakes up. // Dwarven tunnel digger goes to the mine. facade.digOutGold(); // Dwarf gold digger digs for gold. // Dwarf cart operator moves gold chunks out of the mine. // Dwarven tunnel digger creates another promising tunnel. facade.endDay(); // Dwarf gold digger goes home. // Dwarf gold digger goes to sleep. // Dwarf cart operator goes home. // Dwarf cart operator goes to sleep. // Dwarven tunnel digger goes home. // Dwarven tunnel digger goes to sleep. ``` ## Applicability Use the Facade pattern when * you want to provide a simple interface to a complex subsystem. Subsystems often get more complex as they evolve. Most patterns, when applied, result in more and smaller classes. This makes the subsystem more reusable and easier to customize, but it also becomes harder to use for clients that don't need to customize it. A facade can provide a simple default view of the subsystem that is good enough for most clients. Only clients needing more customizability will need to look beyond the facade. * there are many dependencies between clients and the implementation classes of an abstraction. Introduce a facade to decouple the subsystem from clients and other subsystems, thereby promoting subsystem independence and portability. * you want to layer your subsystems. Use a facade to define an entry point to each subsystem level. If subsystems are dependent, then you can simplify the dependencies between them by making them communicate with each other solely through their facades. ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.18.0/facade/pom.xml000066400000000000000000000036431322244523500203570ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 facade org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/facade/src/000077500000000000000000000000001322244523500176235ustar00rootroot00000000000000java-design-patterns-1.18.0/facade/src/main/000077500000000000000000000000001322244523500205475ustar00rootroot00000000000000java-design-patterns-1.18.0/facade/src/main/java/000077500000000000000000000000001322244523500214705ustar00rootroot00000000000000java-design-patterns-1.18.0/facade/src/main/java/com/000077500000000000000000000000001322244523500222465ustar00rootroot00000000000000java-design-patterns-1.18.0/facade/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500240765ustar00rootroot00000000000000java-design-patterns-1.18.0/facade/src/main/java/com/iluwatar/facade/000077500000000000000000000000001322244523500253015ustar00rootroot00000000000000java-design-patterns-1.18.0/facade/src/main/java/com/iluwatar/facade/App.java000066400000000000000000000041201322244523500266610ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.facade; /** * * The Facade design pattern is often used when a system is very complex or difficult to understand * because the system has a large number of interdependent classes or its source code is * unavailable. This pattern hides the complexities of the larger system and provides a simpler * interface to the client. It typically involves a single wrapper class which contains a set of * members required by client. These members access the system on behalf of the facade client and * hide the implementation details. *

* In this example the Facade is ({@link DwarvenGoldmineFacade}) and it provides a simpler interface * to the goldmine subsystem. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { DwarvenGoldmineFacade facade = new DwarvenGoldmineFacade(); facade.startNewDay(); facade.digOutGold(); facade.endDay(); } } java-design-patterns-1.18.0/facade/src/main/java/com/iluwatar/facade/DwarvenCartOperator.java000066400000000000000000000032311322244523500320770ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.facade; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * DwarvenCartOperator is one of the goldmine subsystems. * */ public class DwarvenCartOperator extends DwarvenMineWorker { private static final Logger LOGGER = LoggerFactory.getLogger(DwarvenCartOperator.class); @Override public void work() { LOGGER.info("{} moves gold chunks out of the mine.", name()); } @Override public String name() { return "Dwarf cart operator"; } } java-design-patterns-1.18.0/facade/src/main/java/com/iluwatar/facade/DwarvenGoldDigger.java000066400000000000000000000031751322244523500315100ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.facade; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * DwarvenGoldDigger is one of the goldmine subsystems. * */ public class DwarvenGoldDigger extends DwarvenMineWorker { private static final Logger LOGGER = LoggerFactory.getLogger(DwarvenGoldDigger.class); @Override public void work() { LOGGER.info("{} digs for gold.", name()); } @Override public String name() { return "Dwarf gold digger"; } } java-design-patterns-1.18.0/facade/src/main/java/com/iluwatar/facade/DwarvenGoldmineFacade.java000066400000000000000000000046071322244523500323240ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.facade; import java.util.ArrayList; import java.util.Collection; import java.util.List; /** * * DwarvenGoldmineFacade provides a single interface through which users can operate the subsystems. * * This makes the goldmine easier to operate and cuts the dependencies from the goldmine user to the * subsystems. * */ public class DwarvenGoldmineFacade { private final List workers; /** * Constructor */ public DwarvenGoldmineFacade() { workers = new ArrayList<>(); workers.add(new DwarvenGoldDigger()); workers.add(new DwarvenCartOperator()); workers.add(new DwarvenTunnelDigger()); } public void startNewDay() { makeActions(workers, DwarvenMineWorker.Action.WAKE_UP, DwarvenMineWorker.Action.GO_TO_MINE); } public void digOutGold() { makeActions(workers, DwarvenMineWorker.Action.WORK); } public void endDay() { makeActions(workers, DwarvenMineWorker.Action.GO_HOME, DwarvenMineWorker.Action.GO_TO_SLEEP); } private static void makeActions(Collection workers, DwarvenMineWorker.Action... actions) { for (DwarvenMineWorker worker : workers) { worker.action(actions); } } } java-design-patterns-1.18.0/facade/src/main/java/com/iluwatar/facade/DwarvenMineWorker.java000066400000000000000000000047521322244523500315650ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.facade; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * DwarvenMineWorker is one of the goldmine subsystems. * */ public abstract class DwarvenMineWorker { private static final Logger LOGGER = LoggerFactory.getLogger(DwarvenMineWorker.class); public void goToSleep() { LOGGER.info("{} goes to sleep.", name()); } public void wakeUp() { LOGGER.info("{} wakes up.", name()); } public void goHome() { LOGGER.info("{} goes home.", name()); } public void goToMine() { LOGGER.info("{} goes to the mine.", name()); } private void action(Action action) { switch (action) { case GO_TO_SLEEP: goToSleep(); break; case WAKE_UP: wakeUp(); break; case GO_HOME: goHome(); break; case GO_TO_MINE: goToMine(); break; case WORK: work(); break; default: LOGGER.info("Undefined action"); break; } } /** * Perform actions */ public void action(Action... actions) { for (Action action : actions) { action(action); } } public abstract void work(); public abstract String name(); static enum Action { GO_TO_SLEEP, WAKE_UP, GO_HOME, GO_TO_MINE, WORK } } java-design-patterns-1.18.0/facade/src/main/java/com/iluwatar/facade/DwarvenTunnelDigger.java000066400000000000000000000032321322244523500320620ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.facade; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * DwarvenTunnelDigger is one of the goldmine subsystems. * */ public class DwarvenTunnelDigger extends DwarvenMineWorker { private static final Logger LOGGER = LoggerFactory.getLogger(DwarvenTunnelDigger.class); @Override public void work() { LOGGER.info("{} creates another promising tunnel.", name()); } @Override public String name() { return "Dwarven tunnel digger"; } } java-design-patterns-1.18.0/facade/src/test/000077500000000000000000000000001322244523500206025ustar00rootroot00000000000000java-design-patterns-1.18.0/facade/src/test/java/000077500000000000000000000000001322244523500215235ustar00rootroot00000000000000java-design-patterns-1.18.0/facade/src/test/java/com/000077500000000000000000000000001322244523500223015ustar00rootroot00000000000000java-design-patterns-1.18.0/facade/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500241315ustar00rootroot00000000000000java-design-patterns-1.18.0/facade/src/test/java/com/iluwatar/facade/000077500000000000000000000000001322244523500253345ustar00rootroot00000000000000java-design-patterns-1.18.0/facade/src/test/java/com/iluwatar/facade/AppTest.java000066400000000000000000000025071322244523500275630ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.facade; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/facade/src/test/java/com/iluwatar/facade/DwarvenGoldmineFacadeTest.java000066400000000000000000000114561322244523500332170ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.facade; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.slf4j.LoggerFactory; import java.util.LinkedList; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Date: 12/9/15 - 9:40 PM * * @author Jeroen Meulemeester */ public class DwarvenGoldmineFacadeTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(); } @AfterEach public void tearDown() { appender.stop(); } /** * Test a complete day cycle in the gold mine by executing all three different steps: {@link * DwarvenGoldmineFacade#startNewDay()}, {@link DwarvenGoldmineFacade#digOutGold()} and {@link * DwarvenGoldmineFacade#endDay()}. * * See if the workers are doing what's expected from them on each step. */ @Test public void testFullWorkDay() { final DwarvenGoldmineFacade goldMine = new DwarvenGoldmineFacade(); goldMine.startNewDay(); // On the start of a day, all workers should wake up ... assertTrue(appender.logContains("Dwarf gold digger wakes up.")); assertTrue(appender.logContains("Dwarf cart operator wakes up.")); assertTrue(appender.logContains("Dwarven tunnel digger wakes up.")); // ... and go to the mine assertTrue(appender.logContains("Dwarf gold digger goes to the mine.")); assertTrue(appender.logContains("Dwarf cart operator goes to the mine.")); assertTrue(appender.logContains("Dwarven tunnel digger goes to the mine.")); // No other actions were invoked, so the workers shouldn't have done (printed) anything else assertEquals(6, appender.getLogSize()); // Now do some actual work, start digging gold! goldMine.digOutGold(); // Since we gave the dig command, every worker should be doing it's job ... assertTrue(appender.logContains("Dwarf gold digger digs for gold.")); assertTrue(appender.logContains("Dwarf cart operator moves gold chunks out of the mine.")); assertTrue(appender.logContains("Dwarven tunnel digger creates another promising tunnel.")); // Again, they shouldn't be doing anything else. assertEquals(9, appender.getLogSize()); // Enough gold, lets end the day. goldMine.endDay(); // Check if the workers go home ... assertTrue(appender.logContains("Dwarf gold digger goes home.")); assertTrue(appender.logContains("Dwarf cart operator goes home.")); assertTrue(appender.logContains("Dwarven tunnel digger goes home.")); // ... and go to sleep. We need well rested workers the next day :) assertTrue(appender.logContains("Dwarf gold digger goes to sleep.")); assertTrue(appender.logContains("Dwarf cart operator goes to sleep.")); assertTrue(appender.logContains("Dwarven tunnel digger goes to sleep.")); // Every worker should be sleeping now, no other actions allowed assertEquals(15, appender.getLogSize()); } private class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender() { ((Logger) LoggerFactory.getLogger("root")).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public int getLogSize() { return log.size(); } public boolean logContains(String message) { return log.stream().anyMatch(event -> event.getFormattedMessage().equals(message)); } } } java-design-patterns-1.18.0/factory-kit/000077500000000000000000000000001322244523500200655ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-kit/README.md000066400000000000000000000013411322244523500213430ustar00rootroot00000000000000--- layout: pattern title: Factory Kit folder: factory-kit permalink: /patterns/factory-kit/ categories: Creational tags: - Java - Difficulty-Beginner - Functional --- ## Intent Define a factory of immutable content with separated builder and factory interfaces. ![alt text](./etc/factory-kit.png "Factory Kit") ## Applicability Use the Factory Kit pattern when * a class can't anticipate the class of objects it must create * you just want a new instance of a custom builder instead of the global one * you explicitly want to define types of objects, that factory can build * you want a separated builder and creator interface ## Credits * [Design Pattern Reloaded by Remi Forax: ](https://www.youtube.com/watch?v=-k2X7guaArU) java-design-patterns-1.18.0/factory-kit/etc/000077500000000000000000000000001322244523500206405ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-kit/etc/factory-kit.png000066400000000000000000001113021322244523500236000ustar00rootroot00000000000000PNG  IHDR:&IDATx] \M6D[=1!d͖} %4%D(D0,˒Dߝ7～w}?{ysI@z@ _@ @=ZN"Q] E"Q%Q&Y&H$b2YI~5 "H$#d$W_ H$ɈD1*9>~5 "H$DrQ_ue7a[YƏ~ Oo[:ժ~5 "H$D-rSKWuw:4NL G8--s&UK?Σ_mjD"H$b%1wrM--ܻ"R~\kԨ\x F9޽ȑQ ES)FB$D"(\s*W{xBW:R~;%{zVVII))*UsR8Cԫg~Ą,!43A=TG D"H$ \\ eKU+^=ݻ(rWסVV#qUY{V(m%[J1zu>p1_K~SY˖-qQ1HQD!F D"H$ \?jqꔏ]3J#7lu\D>~Rp~~5kVAIUkժӧ}msH*MŊGGp1M0WiH@a3C1&68"4R荄H$D"Q$~qqX1#Qkm6LM=i,KKs/[6[V\;8a0T,sX8[vj/]gQ&(wv?bȎ6c6;Hq4"H$DPH7Q ճV{x*Q7utѣ- HٌWdhh~sbyUdb1p D"H$ zM8))BWs}Nwr'垞Tɏ0D"H$Jb>~BgM4DH"0+կA$dDJsaD"(&#\jD"HF$H4WH$b2+կA$dDL[ܥ3|'uY̳{N#Qoj$QDq'zu>Ey+UQ' A|v4Uj#11֘~LM$}}nկhDmm\yE"?rm8PD9{~1/tJ>4[O'jϼׯsEw .]r/^&$1WݹM bկoyTƻD-8P>D SW ~ qVn>0 魽}+tvp_?[04@bncr3uكuO?;MFb8Ŋ,Z4h'8?|#E@8rf#;nč+{^ُx`m3dY :5@-lلuI"? 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factorykit; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Factory-kit is a creational pattern which defines a factory of immutable content * with separated builder and factory interfaces to deal with the problem of * creating one of the objects specified directly in the factory-kit instance. * *

* In the given example {@link WeaponFactory} represents the factory-kit, that contains * four {@link Builder}s for creating new objects of * the classes implementing {@link Weapon} interface. *
Each of them can be called with {@link WeaponFactory#create(WeaponType)} method, with * an input representing an instance of {@link WeaponType} that needs to * be mapped explicitly with desired class type in the factory instance. */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point. * * @param args @param args command line args */ public static void main(String[] args) { WeaponFactory factory = WeaponFactory.factory(builder -> { builder.add(WeaponType.SWORD, Sword::new); builder.add(WeaponType.AXE, Axe::new); builder.add(WeaponType.SPEAR, Spear::new); builder.add(WeaponType.BOW, Bow::new); }); Weapon axe = factory.create(WeaponType.AXE); LOGGER.info(axe.toString()); } } java-design-patterns-1.18.0/factory-kit/src/main/java/com/iluwatar/factorykit/Axe.java000066400000000000000000000024431322244523500306710ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factorykit; /** * Class representing Axe */ public class Axe implements Weapon { @Override public String toString() { return "Axe"; } } java-design-patterns-1.18.0/factory-kit/src/main/java/com/iluwatar/factorykit/Bow.java000066400000000000000000000024441322244523500307040ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factorykit; /** * Class representing Bows */ public class Bow implements Weapon { @Override public String toString() { return "Bow"; } } java-design-patterns-1.18.0/factory-kit/src/main/java/com/iluwatar/factorykit/Builder.java000066400000000000000000000025521322244523500315430ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factorykit; import java.util.function.Supplier; /** * Functional interface that allows adding builder with name to the factory. */ public interface Builder { void add(WeaponType name, Supplier supplier); } java-design-patterns-1.18.0/factory-kit/src/main/java/com/iluwatar/factorykit/Spear.java000066400000000000000000000024501322244523500312240ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factorykit; /** * Class representing Spear */ public class Spear implements Weapon { @Override public String toString() { return "Spear"; } } java-design-patterns-1.18.0/factory-kit/src/main/java/com/iluwatar/factorykit/Sword.java000066400000000000000000000024511322244523500312510ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factorykit; /** * Class representing Swords */ public class Sword implements Weapon { @Override public String toString() { return "Sword"; } } java-design-patterns-1.18.0/factory-kit/src/main/java/com/iluwatar/factorykit/Weapon.java000066400000000000000000000023411322244523500314020ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factorykit; /** * Interface representing weapon. */ public interface Weapon { } java-design-patterns-1.18.0/factory-kit/src/main/java/com/iluwatar/factorykit/WeaponFactory.java000066400000000000000000000044271322244523500327410ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factorykit; import java.util.HashMap; import java.util.Map; import java.util.function.Consumer; import java.util.function.Supplier; /** * Functional interface, an example of the factory-kit design pattern. *
Instance created locally gives an opportunity to strictly define * which objects types the instance of a factory will be able to create. *
Factory is a placeholder for {@link Builder}s * with {@link WeaponFactory#create(WeaponType)} method to initialize new objects. */ public interface WeaponFactory { /** * Creates an instance of the given type. * @param name representing enum of an object type to be created. * @return new instance of a requested class implementing {@link Weapon} interface. */ Weapon create(WeaponType name); /** * Creates factory - placeholder for specified {@link Builder}s. * @param consumer for the new builder to the factory. * @return factory with specified {@link Builder}s */ static WeaponFactory factory(Consumer consumer) { Map> map = new HashMap<>(); consumer.accept(map::put); return name -> map.get(name).get(); } } java-design-patterns-1.18.0/factory-kit/src/main/java/com/iluwatar/factorykit/WeaponType.java000066400000000000000000000023721322244523500322500ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factorykit; /** * Enumerates {@link Weapon} types */ public enum WeaponType { SWORD, AXE, BOW, SPEAR } java-design-patterns-1.18.0/factory-kit/src/test/000077500000000000000000000000001322244523500216335ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-kit/src/test/java/000077500000000000000000000000001322244523500225545ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-kit/src/test/java/com/000077500000000000000000000000001322244523500233325ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-kit/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500251625ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-kit/src/test/java/com/iluwatar/factorykit/000077500000000000000000000000001322244523500273415ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-kit/src/test/java/com/iluwatar/factorykit/app/000077500000000000000000000000001322244523500301215ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-kit/src/test/java/com/iluwatar/factorykit/app/AppTest.java000066400000000000000000000025701322244523500323500ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factorykit.app; import com.iluwatar.factorykit.App; import org.junit.jupiter.api.Test; /** * Application Test Entrypoint */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/factory-kit/src/test/java/com/iluwatar/factorykit/factorykit/000077500000000000000000000000001322244523500315205ustar00rootroot00000000000000FactoryKitTest.java000066400000000000000000000057671322244523500352420ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-kit/src/test/java/com/iluwatar/factorykit/factorykit /** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factorykit.factorykit; import com.iluwatar.factorykit.Axe; import com.iluwatar.factorykit.Spear; import com.iluwatar.factorykit.Sword; import com.iluwatar.factorykit.Weapon; import com.iluwatar.factorykit.WeaponFactory; import com.iluwatar.factorykit.WeaponType; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Test Factory Kit Pattern */ public class FactoryKitTest { private WeaponFactory factory; @BeforeEach public void init() { factory = WeaponFactory.factory(builder -> { builder.add(WeaponType.SPEAR, Spear::new); builder.add(WeaponType.AXE, Axe::new); builder.add(WeaponType.SWORD, Sword::new); }); } /** * Testing {@link WeaponFactory} to produce a SPEAR asserting that the Weapon is an instance of {@link Spear} */ @Test public void testSpearWeapon() { Weapon weapon = factory.create(WeaponType.SPEAR); verifyWeapon(weapon, Spear.class); } /** * Testing {@link WeaponFactory} to produce a AXE asserting that the Weapon is an instance of {@link Axe} */ @Test public void testAxeWeapon() { Weapon weapon = factory.create(WeaponType.AXE); verifyWeapon(weapon, Axe.class); } /** * Testing {@link WeaponFactory} to produce a SWORD asserting that the Weapon is an instance of {@link Sword} */ @Test public void testWeapon() { Weapon weapon = factory.create(WeaponType.SWORD); verifyWeapon(weapon, Sword.class); } /** * This method asserts that the weapon object that is passed is an instance of the clazz * * @param weapon weapon object which is to be verified * @param clazz expected class of the weapon */ private void verifyWeapon(Weapon weapon, Class clazz) { assertTrue(clazz.isInstance(weapon), "Weapon must be an object of: " + clazz.getName()); } } java-design-patterns-1.18.0/factory-method/000077500000000000000000000000001322244523500205565ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-method/.gitignore000066400000000000000000000000111322244523500225360ustar00rootroot00000000000000/target/ java-design-patterns-1.18.0/factory-method/README.md000066400000000000000000000066021322244523500220410ustar00rootroot00000000000000--- layout: pattern title: Factory Method folder: factory-method permalink: /patterns/factory-method/ categories: Creational tags: - Java - Difficulty-Beginner - Gang Of Four --- ## Also known as Virtual Constructor ## Intent Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses. ## Explanation Real world example > Blacksmith manufactures weapons. Elves require Elvish weapons and orcs require Orcish weapons. Depending on the customer at hand the right type of blacksmith is summoned. In plain words > It provides a way to delegate the instantiation logic to child classes. Wikipedia says > In class-based programming, the factory method pattern is a creational pattern that uses factory methods to deal with the problem of creating objects without having to specify the exact class of the object that will be created. This is done by creating objects by calling a factory method—either specified in an interface and implemented by child classes, or implemented in a base class and optionally overridden by derived classes—rather than by calling a constructor. **Programmatic Example** Taking our blacksmith example above. First of all we have a blacksmith interface and some implementations for it ``` public interface Blacksmith { Weapon manufactureWeapon(WeaponType weaponType); } public class ElfBlacksmith implements Blacksmith { public Weapon manufactureWeapon(WeaponType weaponType) { return new ElfWeapon(weaponType); } } public class OrcBlacksmith implements Blacksmith { public Weapon manufactureWeapon(WeaponType weaponType) { return new OrcWeapon(weaponType); } } ``` Now as the customers come the correct type of blacksmith is summoned and requested weapons are manufactured ``` Blacksmith blacksmith = new ElfBlacksmith(); blacksmith.manufactureWeapon(WeaponType.SPEAR); blacksmith.manufactureWeapon(WeaponType.AXE); // Elvish weapons are created ``` ## Applicability Use the Factory Method pattern when * a class can't anticipate the class of objects it must create * a class wants its subclasses to specify the objects it creates * classes delegate responsibility to one of several helper subclasses, and you want to localize the knowledge of which helper subclass is the delegate ## Presentations * [Factory Method Pattern](etc/presentation.html) ## Real world examples * [java.util.Calendar](http://docs.oracle.com/javase/8/docs/api/java/util/Calendar.html#getInstance--) * [java.util.ResourceBundle](http://docs.oracle.com/javase/8/docs/api/java/util/ResourceBundle.html#getBundle-java.lang.String-) * [java.text.NumberFormat](http://docs.oracle.com/javase/8/docs/api/java/text/NumberFormat.html#getInstance--) * [java.nio.charset.Charset](http://docs.oracle.com/javase/8/docs/api/java/nio/charset/Charset.html#forName-java.lang.String-) * [java.net.URLStreamHandlerFactory](http://docs.oracle.com/javase/8/docs/api/java/net/URLStreamHandlerFactory.html#createURLStreamHandler-java.lang.String-) * [java.util.EnumSet](https://docs.oracle.com/javase/8/docs/api/java/util/EnumSet.html#of-E-) * [javax.xml.bind.JAXBContext](https://docs.oracle.com/javase/8/docs/api/javax/xml/bind/JAXBContext.html#createMarshaller--) ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.18.0/factory-method/etc/000077500000000000000000000000001322244523500213315ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-method/etc/diagram1.png000066400000000000000000001647311322244523500235400ustar00rootroot00000000000000PNG  IHDRTEsRGBgAMA a pHYs+nIDATx^{;rV lb@3f{=g9Y"Jmgnä=8}][5SS}kVi,1= 6@\ϳË>?͍#XWNxїBE+.[ >b#["H-[#Fl WGl _dVef27|c%&L"!:Erb F'SM-KL:b 3wEBbub[-\bcVvKK3z[MEAlt[4Mh    B!  hH0*  4n N|sLh MEAlt[4M[Z/!>>džE sEb i-,`Eb l-|UUQ9JܑI̺g&h}i}-ȴ>OJidZ'xb42RE ^"L$8;_hVCG0đWJd?O]KT\Xw_1Kdb4XFl -񪏋x;" [$åbd-x5-bآ h:-6?    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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factory.method; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * The Factory Method is a creational design pattern which uses factory methods to deal with the * problem of creating objects without specifying the exact class of object that will be created. * This is done by creating objects via calling a factory method either specified in an interface * and implemented by child classes, or implemented in a base class and optionally overridden by * derived classes—rather than by calling a constructor. *

* In this Factory Method example we have an interface ({@link Blacksmith}) with a method for * creating objects ({@link Blacksmith#manufactureWeapon}). The concrete subclasses ( * {@link OrcBlacksmith}, {@link ElfBlacksmith}) then override the method to produce objects of * their liking. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); private final Blacksmith blacksmith; /** * Creates an instance of App which will use blacksmith to manufacture * the weapons for war. * App is unaware which concrete implementation of {@link Blacksmith} it is using. * The decision of which blacksmith implementation to use may depend on configuration, or * the type of rival in war. * @param blacksmith a non-null implementation of blacksmith */ public App(Blacksmith blacksmith) { this.blacksmith = blacksmith; } /** * Program entry point * * @param args command line args */ public static void main(String[] args) { // Lets go to war with Orc weapons App app = new App(new OrcBlacksmith()); app.manufactureWeapons(); // Lets go to war with Elf weapons app = new App(new ElfBlacksmith()); app.manufactureWeapons(); } private void manufactureWeapons() { Weapon weapon; weapon = blacksmith.manufactureWeapon(WeaponType.SPEAR); LOGGER.info(weapon.toString()); weapon = blacksmith.manufactureWeapon(WeaponType.AXE); LOGGER.info(weapon.toString()); } } java-design-patterns-1.18.0/factory-method/src/main/java/com/iluwatar/factory/method/Blacksmith.java000066400000000000000000000024761322244523500335040ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factory.method; /** * * The interface containing method for producing objects. * */ public interface Blacksmith { Weapon manufactureWeapon(WeaponType weaponType); } ElfBlacksmith.java000066400000000000000000000025721322244523500340510ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-method/src/main/java/com/iluwatar/factory/method/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factory.method; /** * * Concrete subclass for creating new objects. * */ public class ElfBlacksmith implements Blacksmith { public Weapon manufactureWeapon(WeaponType weaponType) { return new ElfWeapon(weaponType); } } java-design-patterns-1.18.0/factory-method/src/main/java/com/iluwatar/factory/method/ElfWeapon.java000066400000000000000000000027651322244523500333040ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factory.method; /** * ElfWeapon. */ public class ElfWeapon implements Weapon { private WeaponType weaponType; public ElfWeapon(WeaponType weaponType) { this.weaponType = weaponType; } @Override public String toString() { return "Elven " + weaponType; } @Override public WeaponType getWeaponType() { return weaponType; } } OrcBlacksmith.java000066400000000000000000000025711322244523500340650ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-method/src/main/java/com/iluwatar/factory/method/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factory.method; /** * * Concrete subclass for creating new objects. * */ public class OrcBlacksmith implements Blacksmith { public Weapon manufactureWeapon(WeaponType weaponType) { return new OrcWeapon(weaponType); } } java-design-patterns-1.18.0/factory-method/src/main/java/com/iluwatar/factory/method/OrcWeapon.java000066400000000000000000000027661322244523500333220ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factory.method; /** * OrcWeapon. */ public class OrcWeapon implements Weapon { private WeaponType weaponType; public OrcWeapon(WeaponType weaponType) { this.weaponType = weaponType; } @Override public String toString() { return "Orcish " + weaponType; } @Override public WeaponType getWeaponType() { return weaponType; } } java-design-patterns-1.18.0/factory-method/src/main/java/com/iluwatar/factory/method/Weapon.java000066400000000000000000000023701322244523500326450ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factory.method; /** * Weapon interface. */ public interface Weapon { WeaponType getWeaponType(); } java-design-patterns-1.18.0/factory-method/src/main/java/com/iluwatar/factory/method/WeaponType.java000066400000000000000000000027001322244523500335040ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factory.method; /** * * WeaponType enumeration * */ public enum WeaponType { SHORT_SWORD("short sword"), SPEAR("spear"), AXE("axe"), UNDEFINED(""); private String title; WeaponType(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.18.0/factory-method/src/test/000077500000000000000000000000001322244523500223245ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-method/src/test/java/000077500000000000000000000000001322244523500232455ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-method/src/test/java/com/000077500000000000000000000000001322244523500240235ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-method/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500256535ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-method/src/test/java/com/iluwatar/factory/000077500000000000000000000000001322244523500273225ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-method/src/test/java/com/iluwatar/factory/method/000077500000000000000000000000001322244523500306025ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-method/src/test/java/com/iluwatar/factory/method/AppTest.java000066400000000000000000000026351322244523500330330ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factory.method; import org.junit.jupiter.api.Test; import java.io.IOException; /** * Tests that Factory Method example runs without errors. */ public class AppTest { @Test public void test() throws IOException { String[] args = {}; App.main(args); } } FactoryMethodTest.java000066400000000000000000000100751322244523500350010ustar00rootroot00000000000000java-design-patterns-1.18.0/factory-method/src/test/java/com/iluwatar/factory/method/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.factory.method; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertTrue; /** * The Factory Method is a creational design pattern which uses factory methods to deal with the * problem of creating objects without specifying the exact class of object that will be created. * This is done by creating objects via calling a factory method either specified in an interface * and implemented by child classes, or implemented in a base class and optionally overridden by * derived classes—rather than by calling a constructor. * *

Factory produces the object of its liking. * The weapon {@link Weapon} manufactured by the * blacksmith depends on the kind of factory implementation it is referring to. *

*/ public class FactoryMethodTest { /** * Testing {@link OrcBlacksmith} to produce a SPEAR asserting that the Weapon is an instance * of {@link OrcWeapon}. */ @Test public void testOrcBlacksmithWithSpear() { Blacksmith blacksmith = new OrcBlacksmith(); Weapon weapon = blacksmith.manufactureWeapon(WeaponType.SPEAR); verifyWeapon(weapon, WeaponType.SPEAR, OrcWeapon.class); } /** * Testing {@link OrcBlacksmith} to produce an AXE asserting that the Weapon is an instance * of {@link OrcWeapon}. */ @Test public void testOrcBlacksmithWithAxe() { Blacksmith blacksmith = new OrcBlacksmith(); Weapon weapon = blacksmith.manufactureWeapon(WeaponType.AXE); verifyWeapon(weapon, WeaponType.AXE, OrcWeapon.class); } /** * Testing {@link ElfBlacksmith} to produce a SHORT_SWORD asserting that the Weapon is an * instance of {@link ElfWeapon}. */ @Test public void testElfBlacksmithWithShortSword() { Blacksmith blacksmith = new ElfBlacksmith(); Weapon weapon = blacksmith.manufactureWeapon(WeaponType.SHORT_SWORD); verifyWeapon(weapon, WeaponType.SHORT_SWORD, ElfWeapon.class); } /** * Testing {@link ElfBlacksmith} to produce a SPEAR asserting that the Weapon is an instance * of {@link ElfWeapon}. */ @Test public void testElfBlacksmithWithSpear() { Blacksmith blacksmith = new ElfBlacksmith(); Weapon weapon = blacksmith.manufactureWeapon(WeaponType.SPEAR); verifyWeapon(weapon, WeaponType.SPEAR, ElfWeapon.class); } /** * This method asserts that the weapon object that is passed is an instance of the clazz and the * weapon is of type expectedWeaponType. * * @param weapon weapon object which is to be verified * @param expectedWeaponType expected WeaponType of the weapon * @param clazz expected class of the weapon */ private void verifyWeapon(Weapon weapon, WeaponType expectedWeaponType, Class clazz) { assertTrue(clazz.isInstance(weapon), "Weapon must be an object of: " + clazz.getName()); assertEquals(expectedWeaponType, weapon.getWeaponType(), "Weapon must be of weaponType: " + expectedWeaponType); } } java-design-patterns-1.18.0/faq.md000066400000000000000000000075131322244523500167300ustar00rootroot00000000000000--- layout: page title: FAQ permalink: /faq/ icon: fa-question page-index: 5 --- ### Q1: What is the difference between State and Strategy patterns? {#Q1} While the implementation is similar they solve different problems. The State pattern deals with what state an object is in - it encapsulates state-dependent behavior. The Strategy pattern deals with how an object performs a certain task - it encapsulates an algorithm. ### Q2: What is the difference between Strategy and Template Method patterns? {#Q2} In Template Method the algorithm is chosen at compile time via inheritance. With Strategy pattern the algorithm is chosen at runtime via composition. ### Q3: What is the difference between Proxy and Decorator patterns? {#Q3} The difference is the intent of the patterns. While Proxy controls access to the object Decorator is used to add responsibilities to the object. ### Q4: What is the difference between Chain of Responsibility and Intercepting Filter patterns? {#Q4} While the implementations look similar there are differences. The Chain of Responsibility forms a chain of request processors and the processors are then executed one by one until the correct processor is found. In Intercepting Filter the chain is constructed from filters and the whole chain is always executed. ### Q5: What is the difference between Visitor and Double Dispatch patterns? {#Q5} The Visitor pattern is a means of adding a new operation to existing classes. Double dispatch is a means of dispatching function calls with respect to two polymorphic types, rather than a single polymorphic type, which is what languages like C++ and Java _do not_ support directly. ### Q6: What are the differences between Flyweight and Object Pool patterns? {#Q6} They differ in the way they are used. Pooled objects can simultaneously be used by a single "client" only. For that, a pooled object must be checked out from the pool, then it can be used by a client, and then the client must return the object back to the pool. Multiple instances of identical objects may exist, up to the maximal capacity of the pool. In contrast, a Flyweight object is singleton, and it can be used simultaneously by multiple clients. As for concurrent access, pooled objects can be mutable and they usually don't need to be thread safe, as typically, only one thread is going to use a specific instance at the same time. Flyweight must either be immutable (the best option), or implement thread safety. As for performance and scalability, pools can become bottlenecks, if all the pooled objects are in use and more clients need them, threads will become blocked waiting for available object from the pool. This is not the case with Flyweight. ### Q7: What are the differences between FluentInterface and Builder patterns? {#Q7} Fluent interfaces are sometimes confused with the Builder pattern, because they share method chaining and a fluent usage. However, fluent interfaces are not primarily used to create shared (mutable) objects, but to configure complex objects without having to respecify the target object on every property change. ### Q8: What is the difference between java.io.Serialization and Memento pattern? {#Q8} Memento is typically used to implement rollback/save-point support. Example we might want to mark the state of an object at a point in time, do some work and then decide to rollback to the previous state. On the other hand serialization may be used as a tool to save the state of an object into byte[] and preserving the contents in memory or disk. When someone invokes the memento to revert object's previous state then we can deserialize the information stored and recreate previous state. So Memento is a pattern and serialization is a tool that can be used to implement this pattern. Other ways to implement the pattern can be to clone the contents of the object and keep track of those clones. java-design-patterns-1.18.0/feature-toggle/000077500000000000000000000000001322244523500205435ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/README.md000066400000000000000000000020111322244523500220140ustar00rootroot00000000000000--- layout: pattern title: Feature Toggle folder: feature-toggle permalink: /patterns/feature-toggle/ categories: Behavioral tags: - Java - Difficulty-Beginner --- ## Also known as Feature Flag ## Intent Used to switch code execution paths based on properties or groupings. Allowing new features to be released, tested and rolled out. Allowing switching back to the older feature quickly if needed. It should be noted that this pattern, can easily introduce code complexity. There is also cause for concern that the old feature that the toggle is eventually going to phase out is never removed, causing redundant code smells and increased maintainability. ![alt text](./etc/feature-toggle.png "Feature Toggle") ## Applicability Use the Feature Toggle pattern when * Giving different features to different users. * Rolling out a new feature incrementally. * Switching between development and production environments. ## Credits * [Martin Fowler 29 October 2010 (2010-10-29).](http://martinfowler.com/bliki/FeatureToggle.html)java-design-patterns-1.18.0/feature-toggle/etc/000077500000000000000000000000001322244523500213165ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/etc/feature-toggle.png000066400000000000000000001542011322244523500247410ustar00rootroot00000000000000PNG  IHDRV躊HIDATx] x F!Nh$jIѐbW&־b5V4QUkUk}ޙ;Y;{s̙39sg2w&@ @ @&k@ @ h$ @ @ҙ@ h3g" WkϘ*@z{KjB΁&-3@߼I޴i.UڭOFwlC:v2"< ƣ )f$ՄvM| 3@A|HȠ2eny|B>|9sf䓲,&|eOmg֭<ڵظTZëWI=z4ϓ'glR XU$Ig5E@_s$L 4-FGe"\ ">#(v!>iDFܱw1͛Jk`ѢQ8wٹm<ְvĺunv3gIsX=8Z9h3tVr45:I:A[[7.ܹC^ާ#'N Ģݽ{;r0G\wl-Ɖ"k5l07&f牠l'Q3DjB[΁&F'>Ig1h+:YnJ7o' <}؞e/T( WTfM♏Oc b>s 5yBg@tcŊ(vhŊ@l1Ɨ/rȖs"#')RAek@;w @g¡#9ɋa< _6S$&4hk$ Ơh>Y4q˫ǻF)Sglٲ`9Ժ'QhQ'Dqð% =![%/V|a1 xz27Rad3uIjB΁&VHҙ@ h ;ۚ6#Gab۷Ts7ggJޒзso#$L 4}GGHYMs @AcHI: rDHҙ@ h "Ig5A΁-.3gD X{#EGv @T,-iEXzyHHMs @Dݒ"^A^!#R*3QWUv=ϜH#ÒЮ !tۡ sJ湈@}V5A-/./|]b ղUƟ4 T g-{vUdk-#Rf+فjM3_d:I:wnG7*,Q]?;n\/SOޭ ?bDw"^WA6c7]xvw]FG-$dP2[<>J!Stj|9sf䓲L^ޜ+[LL&ڵrXvm[*[[[~tuuɓ''&=ѭOӦ˕+R UɞnϞuT)\8߾~LK+D3F%h8l&HKP*ղX}k㛐ޅ['co#jnsݾ{k/R%β\2h͛qVzC;eZjDm]4YvbJ`-jNԄ&$Gzt65͜Сp~:I~-oj(8'O4  ]6sf_}P}HLN. 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qd&Gg&d}f_3YH$U=: \QQdQ#CvnCg5ڵL>:_ѧOמ=]ݝZY5/-ӄqqח_~\yǎmf۴oopt[t͹o..@[~E2 H)|†I5zdf_sC2u^d ~ȝ;9ʎ}B9%Ar܏ java-design-patterns-1.18.0/feature-toggle/pom.xml000066400000000000000000000040311322244523500220560ustar00rootroot00000000000000 java-design-patterns com.iluwatar 1.18.0 4.0.0 feature-toggle org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/feature-toggle/src/000077500000000000000000000000001322244523500213325ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/main/000077500000000000000000000000001322244523500222565ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/main/java/000077500000000000000000000000001322244523500231775ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/main/java/com/000077500000000000000000000000001322244523500237555ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500256055ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/main/java/com/iluwatar/featuretoggle/000077500000000000000000000000001322244523500304425ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/main/java/com/iluwatar/featuretoggle/App.java000066400000000000000000000115241322244523500320300ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.featuretoggle; import com.iluwatar.featuretoggle.pattern.Service; import com.iluwatar.featuretoggle.pattern.propertiesversion.PropertiesFeatureToggleVersion; import com.iluwatar.featuretoggle.pattern.tieredversion.TieredFeatureToggleVersion; import com.iluwatar.featuretoggle.user.User; import com.iluwatar.featuretoggle.user.UserGroup; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.Properties; /** * The Feature Toggle pattern allows for complete code executions to be turned on or off with ease. This allows features * to be controlled by either dynamic methods just as {@link User} information or by {@link Properties}. In the App * below there are two examples. Firstly the {@link Properties} version of the feature toggle, where the enhanced * version of the welcome message which is personalised is turned either on or off at instance creation. This method * is not as dynamic as the {@link User} driven version where the feature of the personalised welcome message is * dependant on the {@link UserGroup} the {@link User} is in. So if the user is a memeber of the * {@link UserGroup#isPaid(User)} then they get an ehanced version of the welcome message. * * Note that this pattern can easily introduce code complexity, and if not kept in check can result in redundant * unmaintained code within the codebase. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Block 1 shows the {@link PropertiesFeatureToggleVersion} being run with {@link Properties} setting the feature * toggle to enabled. * * Block 2 shows the {@link PropertiesFeatureToggleVersion} being run with {@link Properties} setting the feature * toggle to disabled. Notice the difference with the printed welcome message the username is not included. * * Block 3 shows the {@link com.iluwatar.featuretoggle.pattern.tieredversion.TieredFeatureToggleVersion} being * set up with two users on who is on the free level, while the other is on the paid level. When the * {@link Service#getWelcomeMessage(User)} is called with the paid {@link User} note that the welcome message * contains their username, while the same service call with the free tier user is more generic. No username is * printed. * * @see User * @see UserGroup * @see Service * @see PropertiesFeatureToggleVersion * @see com.iluwatar.featuretoggle.pattern.tieredversion.TieredFeatureToggleVersion; */ public static void main(String[] args) { final Properties properties = new Properties(); properties.put("enhancedWelcome", true); Service service = new PropertiesFeatureToggleVersion(properties); final String welcomeMessage = service.getWelcomeMessage(new User("Jamie No Code")); LOGGER.info(welcomeMessage); // --------------------------------------------- final Properties turnedOff = new Properties(); turnedOff.put("enhancedWelcome", false); Service turnedOffService = new PropertiesFeatureToggleVersion(turnedOff); final String welcomeMessageturnedOff = turnedOffService.getWelcomeMessage(new User("Jamie No Code")); LOGGER.info(welcomeMessageturnedOff); // -------------------------------------------- Service service2 = new TieredFeatureToggleVersion(); final User paidUser = new User("Jamie Coder"); final User freeUser = new User("Alan Defect"); UserGroup.addUserToPaidGroup(paidUser); UserGroup.addUserToFreeGroup(freeUser); final String welcomeMessagePaidUser = service2.getWelcomeMessage(paidUser); final String welcomeMessageFreeUser = service2.getWelcomeMessage(freeUser); LOGGER.info(welcomeMessageFreeUser); LOGGER.info(welcomeMessagePaidUser); } } java-design-patterns-1.18.0/feature-toggle/src/main/java/com/iluwatar/featuretoggle/pattern/000077500000000000000000000000001322244523500321175ustar00rootroot00000000000000Service.java000066400000000000000000000044021322244523500343030ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/main/java/com/iluwatar/featuretoggle/pattern/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.featuretoggle.pattern; import com.iluwatar.featuretoggle.user.User; /** * Simple interfaces to allow the calling of the method to generate the welcome message for a given user. While there is * a helper method to gather the the status of the feature toggle. In some cases there is no need for the * {@link Service#isEnhanced()} in {@link com.iluwatar.featuretoggle.pattern.tieredversion.TieredFeatureToggleVersion} * where the toggle is determined by the actual {@link User}. * * @see com.iluwatar.featuretoggle.pattern.propertiesversion.PropertiesFeatureToggleVersion * @see com.iluwatar.featuretoggle.pattern.tieredversion.TieredFeatureToggleVersion * @see User */ public interface Service { /** * Generates a welcome message for the passed user. * * @param user the {@link User} to be used if the message is to be personalised. * @return Generated {@link String} welcome message */ String getWelcomeMessage(User user); /** * Returns if the welcome message to be displayed will be the enhanced version. * * @return Boolean {@value true} if enhanced. */ boolean isEnhanced(); } propertiesversion/000077500000000000000000000000001322244523500356425ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/main/java/com/iluwatar/featuretoggle/patternPropertiesFeatureToggleVersion.java000066400000000000000000000106461322244523500446740ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/main/java/com/iluwatar/featuretoggle/pattern/propertiesversion/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.featuretoggle.pattern.propertiesversion; import com.iluwatar.featuretoggle.pattern.Service; import com.iluwatar.featuretoggle.user.User; import java.util.Properties; /** * This example of the Feature Toogle pattern is less dynamic version than * {@link com.iluwatar.featuretoggle.pattern.tieredversion.TieredFeatureToggleVersion} where the feature is turned on * or off at the time of creation of the service. This example uses simple Java {@link Properties} however it could as * easily be done with an external configuration file loaded by Spring and so on. A good example of when to use this * version of the feature toggle is when new features are being developed. So you could have a configuration property * boolean named development or some sort of system environment variable. * * @see Service * @see com.iluwatar.featuretoggle.pattern.tieredversion.TieredFeatureToggleVersion * @see User */ public class PropertiesFeatureToggleVersion implements Service { private boolean isEnhanced; /** * Creates an instance of {@link PropertiesFeatureToggleVersion} using the passed {@link Properties} to determine, * the status of the feature toggle {@link PropertiesFeatureToggleVersion#isEnhanced()}. There is also some defensive * code to ensure the {@link Properties} passed are as expected. * * @param properties {@link Properties} used to configure the service and toggle features. * @throws IllegalArgumentException when the passed {@link Properties} is not as expected * @see Properties */ public PropertiesFeatureToggleVersion(final Properties properties) { if (properties == null) { throw new IllegalArgumentException("No Properties Provided."); } else { try { isEnhanced = (boolean) properties.get("enhancedWelcome"); } catch (Exception e) { throw new IllegalArgumentException("Invalid Enhancement Settings Provided."); } } } /** * Generate a welcome message based on the user being passed and the status of the feature toggle. If the enhanced * version is enabled, then the message will be personalised with the name of the passed {@link User}. However if * disabled then a generic version fo the message is returned. * * @param user the {@link User} to be displayed in the message if the enhanced version is enabled see * {@link PropertiesFeatureToggleVersion#isEnhanced()}. If the enhanced version is enabled, then the * message will be personalised with the name of the passed {@link User}. However if disabled then a * generic version fo the message is returned. * @return Resulting welcome message. * @see User */ @Override public String getWelcomeMessage(final User user) { if (isEnhanced()) { return "Welcome " + user + ". You're using the enhanced welcome message."; } return "Welcome to the application."; } /** * Method that checks if the welcome message to be returned is the enhanced venison or not. For this service it will * see the value of the boolean that was set in the constructor * {@link PropertiesFeatureToggleVersion#PropertiesFeatureToggleVersion(Properties)} * * @return Boolean value {@value true} if enhanced. */ @Override public boolean isEnhanced() { return isEnhanced; } } tieredversion/000077500000000000000000000000001322244523500347225ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/main/java/com/iluwatar/featuretoggle/patternTieredFeatureToggleVersion.java000066400000000000000000000064211322244523500430300ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/main/java/com/iluwatar/featuretoggle/pattern/tieredversion/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.featuretoggle.pattern.tieredversion; import com.iluwatar.featuretoggle.pattern.Service; import com.iluwatar.featuretoggle.user.User; import com.iluwatar.featuretoggle.user.UserGroup; /** * This example of the Feature Toogle pattern shows how it could be implemented based on a {@link User}. Therefore * showing its use within a tiered application where the paying users get access to different content or * better versions of features. So in this instance a {@link User} is passed in and if they are found to be * on the {@link UserGroup#isPaid(User)} they are welcomed with a personalised message. While the other is more * generic. However this pattern is limited to simple examples such as the one below. * * @see Service * @see User * @see com.iluwatar.featuretoggle.pattern.propertiesversion.PropertiesFeatureToggleVersion * @see UserGroup */ public class TieredFeatureToggleVersion implements Service { /** * Generates a welcome message from the passed {@link User}. The resulting message depends on the group of the * {@link User}. So if the {@link User} is in the {@link UserGroup#paidGroup} then the enhanced version of the * welcome message will be returned where the username is displayed. * * @param user the {@link User} to generate the welcome message for, different messages are displayed if the user is * in the {@link UserGroup#isPaid(User)} or {@link UserGroup#freeGroup} * @return Resulting welcome message. * @see User * @see UserGroup */ @Override public String getWelcomeMessage(User user) { if (UserGroup.isPaid(user)) { return "You're amazing " + user + ". Thanks for paying for this awesome software."; } return "I suppose you can use this software."; } /** * Method that checks if the welcome message to be returned is the enhanced version. For this instance as the logic * is driven by the user group. This method is a little redundant. However can be used to show that there is an * enhanced version available. * * @return Boolean value {@value true} if enhanced. */ @Override public boolean isEnhanced() { return true; } } java-design-patterns-1.18.0/feature-toggle/src/main/java/com/iluwatar/featuretoggle/user/000077500000000000000000000000001322244523500314205ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/main/java/com/iluwatar/featuretoggle/user/User.java000066400000000000000000000033331322244523500332030ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.featuretoggle.user; /** * Used to demonstrate the purpose of the feature toggle. This class actually has nothing to do with the pattern. */ public class User { private String name; /** * Default Constructor setting the username. * * @param name {@link String} to represent the name of the user. */ public User(String name) { this.name = name; } /** * {@inheritDoc} * @return The {@link String} representation of the User, in this case just return the name of the user. */ @Override public String toString() { return name; } } UserGroup.java000066400000000000000000000060151322244523500341410ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/main/java/com/iluwatar/featuretoggle/user/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.featuretoggle.user; import java.util.ArrayList; import java.util.List; /** * Contains the lists of users of different groups paid and free. Used to demonstrate the tiered example of feature * toggle. Allowing certain features to be available to only certain groups of users. * * @see User */ public class UserGroup { private static List freeGroup = new ArrayList<>(); private static List paidGroup = new ArrayList<>(); /** * Add the passed {@link User} to the free user group list. * * @param user {@link User} to be added to the free group * @throws IllegalArgumentException when user is already added to the paid group * @see User */ public static void addUserToFreeGroup(final User user) throws IllegalArgumentException { if (paidGroup.contains(user)) { throw new IllegalArgumentException("User all ready member of paid group."); } else { if (!freeGroup.contains(user)) { freeGroup.add(user); } } } /** * Add the passed {@link User} to the paid user group list. * * @param user {@link User} to be added to the paid group * @throws IllegalArgumentException when the user is already added to the free group * @see User */ public static void addUserToPaidGroup(final User user) throws IllegalArgumentException { if (freeGroup.contains(user)) { throw new IllegalArgumentException("User all ready member of free group."); } else { if (!paidGroup.contains(user)) { paidGroup.add(user); } } } /** * Method to take a {@link User} to determine if the user is in the {@link UserGroup#paidGroup}. * * @param user {@link User} to check if they are in the {@link UserGroup#paidGroup} * * @return true if the {@link User} is in {@link UserGroup#paidGroup} */ public static boolean isPaid(User user) { return paidGroup.contains(user); } } java-design-patterns-1.18.0/feature-toggle/src/test/000077500000000000000000000000001322244523500223115ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/test/java/000077500000000000000000000000001322244523500232325ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/test/java/com/000077500000000000000000000000001322244523500240105ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500256405ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/test/java/com/iluwatar/featuretoggle/000077500000000000000000000000001322244523500304755ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/test/java/com/iluwatar/featuretoggle/pattern/000077500000000000000000000000001322244523500321525ustar00rootroot00000000000000propertiesversion/000077500000000000000000000000001322244523500356755ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/test/java/com/iluwatar/featuretoggle/patternPropertiesFeatureToggleVersionTest.java000066400000000000000000000060301322244523500455570ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/test/java/com/iluwatar/featuretoggle/pattern/propertiesversion/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.featuretoggle.pattern.propertiesversion; import com.iluwatar.featuretoggle.pattern.Service; import com.iluwatar.featuretoggle.user.User; import org.junit.jupiter.api.Test; import java.util.Properties; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertThrows; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Test Properties Toggle */ public class PropertiesFeatureToggleVersionTest { @Test public void testNullPropertiesPassed() throws Exception { assertThrows(IllegalArgumentException.class, () -> { new PropertiesFeatureToggleVersion(null); }); } @Test public void testNonBooleanProperty() throws Exception { assertThrows(IllegalArgumentException.class, () -> { final Properties properties = new Properties(); properties.setProperty("enhancedWelcome", "Something"); new PropertiesFeatureToggleVersion(properties); }); } @Test public void testFeatureTurnedOn() throws Exception { final Properties properties = new Properties(); properties.put("enhancedWelcome", true); Service service = new PropertiesFeatureToggleVersion(properties); assertTrue(service.isEnhanced()); final String welcomeMessage = service.getWelcomeMessage(new User("Jamie No Code")); assertEquals("Welcome Jamie No Code. You're using the enhanced welcome message.", welcomeMessage); } @Test public void testFeatureTurnedOff() throws Exception { final Properties properties = new Properties(); properties.put("enhancedWelcome", false); Service service = new PropertiesFeatureToggleVersion(properties); assertFalse(service.isEnhanced()); final String welcomeMessage = service.getWelcomeMessage(new User("Jamie No Code")); assertEquals("Welcome to the application.", welcomeMessage); } } tieredversion/000077500000000000000000000000001322244523500347555ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/test/java/com/iluwatar/featuretoggle/patternTieredFeatureToggleVersionTest.java000066400000000000000000000051141322244523500437210ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/test/java/com/iluwatar/featuretoggle/pattern/tieredversion/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.featuretoggle.pattern.tieredversion; import com.iluwatar.featuretoggle.pattern.Service; import com.iluwatar.featuretoggle.user.User; import com.iluwatar.featuretoggle.user.UserGroup; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Test Tiered Feature Toggle */ public class TieredFeatureToggleVersionTest { final User paidUser = new User("Jamie Coder"); final User freeUser = new User("Alan Defect"); final Service service = new TieredFeatureToggleVersion(); @BeforeEach public void setUp() throws Exception { UserGroup.addUserToPaidGroup(paidUser); UserGroup.addUserToFreeGroup(freeUser); } @Test public void testGetWelcomeMessageForPaidUser() throws Exception { final String welcomeMessage = service.getWelcomeMessage(paidUser); final String expected = "You're amazing Jamie Coder. Thanks for paying for this awesome software."; assertEquals(expected, welcomeMessage); } @Test public void testGetWelcomeMessageForFreeUser() throws Exception { final String welcomeMessage = service.getWelcomeMessage(freeUser); final String expected = "I suppose you can use this software."; assertEquals(expected, welcomeMessage); } @Test public void testIsEnhancedAlwaysTrueAsTiered() throws Exception { assertTrue(service.isEnhanced()); } } java-design-patterns-1.18.0/feature-toggle/src/test/java/com/iluwatar/featuretoggle/user/000077500000000000000000000000001322244523500314535ustar00rootroot00000000000000UserGroupTest.java000066400000000000000000000045341322244523500350400ustar00rootroot00000000000000java-design-patterns-1.18.0/feature-toggle/src/test/java/com/iluwatar/featuretoggle/user/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.featuretoggle.user; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertThrows; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Test User Group specific feature */ public class UserGroupTest { @Test public void testAddUserToFreeGroup() throws Exception { User user = new User("Free User"); UserGroup.addUserToFreeGroup(user); assertFalse(UserGroup.isPaid(user)); } @Test public void testAddUserToPaidGroup() throws Exception { User user = new User("Paid User"); UserGroup.addUserToPaidGroup(user); assertTrue(UserGroup.isPaid(user)); } @Test public void testAddUserToPaidWhenOnFree() throws Exception { User user = new User("Paid User"); UserGroup.addUserToFreeGroup(user); assertThrows(IllegalArgumentException.class, () -> { UserGroup.addUserToPaidGroup(user); }); } @Test public void testAddUserToFreeWhenOnPaid() throws Exception { User user = new User("Free User"); UserGroup.addUserToPaidGroup(user); assertThrows(IllegalArgumentException.class, () -> { UserGroup.addUserToFreeGroup(user); }); } } java-design-patterns-1.18.0/fluentinterface/000077500000000000000000000000001322244523500210075ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/README.md000066400000000000000000000031611322244523500222670ustar00rootroot00000000000000--- layout: pattern title: Fluent Interface folder: fluentinterface permalink: /patterns/fluentinterface/ categories: Other tags: - Java - Difficulty-Intermediate - Functional --- ## Intent A fluent interface provides an easy-readable, flowing interface, that often mimics a domain specific language. Using this pattern results in code that can be read nearly as human language. ## Implementation A fluent interface can be implemented using any of * Method Chaining - calling a method returns some object on which further methods can be called. * Static Factory Methods and Imports * Named parameters - can be simulated in Java using static factory methods. ![Fluent Interface](./etc/fluentinterface.png "Fluent Interface") ## Applicability Use the Fluent Interface pattern when * you provide an API that would benefit from a DSL-like usage * you have objects that are difficult to configure or use ## Real world examples * [Java 8 Stream API](http://www.oracle.com/technetwork/articles/java/ma14-java-se-8-streams-2177646.html) * [Google Guava FluentInterable](https://github.com/google/guava/wiki/FunctionalExplained) * [JOOQ](http://www.jooq.org/doc/3.0/manual/getting-started/use-cases/jooq-as-a-standalone-sql-builder/) * [Mockito](http://mockito.org/) * [Java Hamcrest](http://code.google.com/p/hamcrest/wiki/Tutorial) ## Credits * [Fluent Interface - Martin Fowler](http://www.martinfowler.com/bliki/FluentInterface.html) * [Evolutionary architecture and emergent design: Fluent interfaces - Neal Ford](http://www.ibm.com/developerworks/library/j-eaed14/) * [Internal DSL](http://www.infoq.com/articles/internal-dsls-java) java-design-patterns-1.18.0/fluentinterface/etc/000077500000000000000000000000001322244523500215625ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/etc/fluentinterface.png000066400000000000000000002427401322244523500254570ustar00rootroot00000000000000PNG  IHDRd?(EIDATx \T+{[,.Y.ih .(K(*n"ŭ낂K i VnY22rW:ifYgNK>HUmUxFZ4Yڹs^ǎMԸkWnaBdĉ}dF< ;vԩy[$FD.]]Fݐ*q߶m~NLi޼nxx[5.d 0C? q[[ѢdI<*9y,=yY*yUb& =hgJ#R'벳S[ ս{+>0KqŊO]rАT*n\39Jf\Q/YYBBDv^WM`GR˒OΝjxȒرZnev4S4?Eh{0%Y*p&K]UVãzJ$iܾ}X%KH|?ڪKEE(ʫ Y# Pe͛Ŏu 8qbŚv!)$&7Wr򸰰;wFEPÆ/~w~3Y,9Ҵi&O4qcM̏ƌVĄ֫…#/_>`Y# PeIJDDPTTyMHHEsgիI&L])SJ}5oވ:iP%K~qcYܿu/7n؎EY2? 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.fluentinterface.app; import static java.lang.String.valueOf; import java.util.ArrayList; import java.util.Arrays; import java.util.Iterator; import java.util.List; import java.util.StringJoiner; import java.util.function.Function; import java.util.function.Predicate; import com.iluwatar.fluentinterface.fluentiterable.FluentIterable; import com.iluwatar.fluentinterface.fluentiterable.lazy.LazyFluentIterable; import com.iluwatar.fluentinterface.fluentiterable.simple.SimpleFluentIterable; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * The Fluent Interface pattern is useful when you want to provide an easy readable, flowing API. * Those interfaces tend to mimic domain specific languages, so they can nearly be read as human * languages. *

* In this example two implementations of a {@link FluentIterable} interface are given. The * {@link SimpleFluentIterable} evaluates eagerly and would be too costly for real world * applications. The {@link LazyFluentIterable} is evaluated on termination. Their usage is * demonstrated with a simple number list that is filtered, transformed and collected. The result is * printed afterwards. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point */ public static void main(String[] args) { List integerList = new ArrayList<>(); integerList.addAll(Arrays.asList(1, -61, 14, -22, 18, -87, 6, 64, -82, 26, -98, 97, 45, 23, 2, -68, 45)); prettyPrint("The initial list contains: ", integerList); List firstFiveNegatives = SimpleFluentIterable.fromCopyOf(integerList).filter(negatives()).first(3).asList(); prettyPrint("The first three negative values are: ", firstFiveNegatives); List lastTwoPositives = SimpleFluentIterable.fromCopyOf(integerList).filter(positives()).last(2).asList(); prettyPrint("The last two positive values are: ", lastTwoPositives); SimpleFluentIterable .fromCopyOf(integerList) .filter(number -> number % 2 == 0) .first() .ifPresent(evenNumber -> LOGGER.info("The first even number is: {}", evenNumber)); List transformedList = SimpleFluentIterable.fromCopyOf(integerList).filter(negatives()).map(transformToString()) .asList(); prettyPrint("A string-mapped list of negative numbers contains: ", transformedList); List lastTwoOfFirstFourStringMapped = LazyFluentIterable.from(integerList).filter(positives()).first(4).last(2) .map(number -> "String[" + valueOf(number) + "]").asList(); prettyPrint( "The lazy list contains the last two of the first four positive numbers mapped to Strings: ", lastTwoOfFirstFourStringMapped); LazyFluentIterable .from(integerList) .filter(negatives()) .first(2) .last() .ifPresent(lastOfFirstTwo -> LOGGER.info("The last of the first two negatives is: {}", lastOfFirstTwo)); } private static Function transformToString() { return integer -> "String[" + valueOf(integer) + "]"; } private static Predicate negatives() { return integer -> integer < 0; } private static Predicate positives() { return integer -> integer > 0; } private static void prettyPrint(String prefix, Iterable iterable) { prettyPrint(", ", prefix, iterable); } private static void prettyPrint(String delimiter, String prefix, Iterable iterable) { StringJoiner joiner = new StringJoiner(delimiter, prefix, "."); Iterator iterator = iterable.iterator(); while (iterator.hasNext()) { joiner.add(iterator.next().toString()); } LOGGER.info(joiner.toString()); } } fluentiterable/000077500000000000000000000000001322244523500341555ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/src/main/java/com/iluwatar/fluentinterfaceFluentIterable.java000066400000000000000000000075661322244523500377430ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/src/main/java/com/iluwatar/fluentinterface/fluentiterable/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.fluentinterface.fluentiterable; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.Optional; import java.util.function.Function; import java.util.function.Predicate; /** * The FluentIterable is a more convenient implementation of the common iterable interface based on * the fluent interface design pattern. This interface defines common operations, but doesn't aim to * be complete. It was inspired by Guava's com.google.common.collect.FluentIterable. * * @param is the class of objects the iterable contains */ public interface FluentIterable extends Iterable { /** * Filters the contents of Iterable using the given predicate, leaving only the ones which satisfy * the predicate. * * @param predicate the condition to test with for the filtering. If the test is negative, the * tested object is removed by the iterator. * @return a filtered FluentIterable */ FluentIterable filter(Predicate predicate); /** * Returns an Optional containing the first element of this iterable if present, else returns * Optional.empty(). * * @return the first element after the iteration is evaluated */ Optional first(); /** * Evaluates the iteration and leaves only the count first elements. * * @return the first count elements as an Iterable */ FluentIterable first(int count); /** * Evaluates the iteration and returns the last element. This is a terminating operation. * * @return the last element after the iteration is evaluated */ Optional last(); /** * Evaluates the iteration and leaves only the count last elements. * * @return the last counts elements as an Iterable */ FluentIterable last(int count); /** * Transforms this FluentIterable into a new one containing objects of the type T. * * @param function a function that transforms an instance of E into an instance of T * @param the target type of the transformation * @return a new FluentIterable of the new type */ FluentIterable map(Function function); /** * Returns the contents of this Iterable as a List. * * @return a List representation of this Iterable */ List asList(); /** * Utility method that iterates over iterable and adds the contents to a list. * * @param iterable the iterable to collect * @param the type of the objects to iterate * @return a list with all objects of the given iterator */ static List copyToList(Iterable iterable) { List copy = new ArrayList<>(); Iterator iterator = iterable.iterator(); while (iterator.hasNext()) { copy.add(iterator.next()); } return copy; } } lazy/000077500000000000000000000000001322244523500351345ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/src/main/java/com/iluwatar/fluentinterface/fluentiterableDecoratingIterator.java000066400000000000000000000050311322244523500415670ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/src/main/java/com/iluwatar/fluentinterface/fluentiterable/lazy/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.fluentinterface.fluentiterable.lazy; import java.util.Iterator; /** * This class is used to realize LazyFluentIterables. It decorates a given iterator. Does not * support consecutive hasNext() calls. * @param Iterable Collection of Elements of Type E */ public abstract class DecoratingIterator implements Iterator { protected final Iterator fromIterator; private E next; /** * Creates an iterator that decorates the given iterator. */ public DecoratingIterator(Iterator fromIterator) { this.fromIterator = fromIterator; } /** * Precomputes and saves the next element of the Iterable. null is considered as end of data. * * @return true if a next element is available */ @Override public final boolean hasNext() { next = computeNext(); return next != null; } /** * Returns the next element of the Iterable. * * @return the next element of the Iterable, or null if not present. */ @Override public final E next() { if (next == null) { return fromIterator.next(); } else { final E result = next; next = null; return result; } } /** * Computes the next object of the Iterable. Can be implemented to realize custom behaviour for an * iteration process. null is considered as end of data. * * @return the next element of the Iterable. */ public abstract E computeNext(); } LazyFluentIterable.java000066400000000000000000000174041322244523500415520ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/src/main/java/com/iluwatar/fluentinterface/fluentiterable/lazy/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.fluentinterface.fluentiterable.lazy; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.Optional; import java.util.function.Function; import java.util.function.Predicate; import com.iluwatar.fluentinterface.fluentiterable.FluentIterable; /** * This is a lazy implementation of the FluentIterable interface. It evaluates all chained * operations when a terminating operation is applied. * * @param the type of the objects the iteration is about */ public class LazyFluentIterable implements FluentIterable { private final Iterable iterable; /** * This constructor creates a new LazyFluentIterable. It wraps the given iterable. * * @param iterable the iterable this FluentIterable works on. */ protected LazyFluentIterable(Iterable iterable) { this.iterable = iterable; } /** * This constructor can be used to implement anonymous subclasses of the LazyFluentIterable. */ protected LazyFluentIterable() { iterable = this; } /** * Filters the contents of Iterable using the given predicate, leaving only the ones which satisfy * the predicate. * * @param predicate the condition to test with for the filtering. If the test is negative, the * tested object is removed by the iterator. * @return a new FluentIterable object that decorates the source iterable */ @Override public FluentIterable filter(Predicate predicate) { return new LazyFluentIterable() { @Override public Iterator iterator() { return new DecoratingIterator(iterable.iterator()) { @Override public E computeNext() { while (fromIterator.hasNext()) { E candidate = fromIterator.next(); if (predicate.test(candidate)) { return candidate; } } return null; } }; } }; } /** * Can be used to collect objects from the iteration. Is a terminating operation. * * @return an Optional containing the first object of this Iterable */ @Override public Optional first() { Iterator resultIterator = first(1).iterator(); return resultIterator.hasNext() ? Optional.of(resultIterator.next()) : Optional.empty(); } /** * Can be used to collect objects from the iteration. * * @param count defines the number of objects to return * @return the same FluentIterable with a collection decimated to a maximum of 'count' first * objects. */ @Override public FluentIterable first(int count) { return new LazyFluentIterable() { @Override public Iterator iterator() { return new DecoratingIterator(iterable.iterator()) { int currentIndex; @Override public E computeNext() { if (currentIndex < count && fromIterator.hasNext()) { E candidate = fromIterator.next(); currentIndex++; return candidate; } return null; } }; } }; } /** * Can be used to collect objects from the iteration. Is a terminating operation. * * @return an Optional containing the last object of this Iterable */ @Override public Optional last() { Iterator resultIterator = last(1).iterator(); return resultIterator.hasNext() ? Optional.of(resultIterator.next()) : Optional.empty(); } /** * Can be used to collect objects from the Iterable. Is a terminating operation. This operation is * memory intensive, because the contents of this Iterable are collected into a List, when the * next object is requested. * * @param count defines the number of objects to return * @return the same FluentIterable with a collection decimated to a maximum of 'count' last * objects */ @Override public FluentIterable last(int count) { return new LazyFluentIterable() { @Override public Iterator iterator() { return new DecoratingIterator(iterable.iterator()) { private int stopIndex; private int totalElementsCount; private List list; private int currentIndex; @Override public E computeNext() { initialize(); E candidate = null; while (currentIndex < stopIndex && fromIterator.hasNext()) { currentIndex++; fromIterator.next(); } if (currentIndex >= stopIndex && fromIterator.hasNext()) { candidate = fromIterator.next(); } return candidate; } private void initialize() { if (list == null) { list = new ArrayList<>(); Iterator newIterator = iterable.iterator(); while (newIterator.hasNext()) { list.add(newIterator.next()); } totalElementsCount = list.size(); stopIndex = totalElementsCount - count; } } }; } }; } /** * Transforms this FluentIterable into a new one containing objects of the type T. * * @param function a function that transforms an instance of E into an instance of T * @param the target type of the transformation * @return a new FluentIterable of the new type */ @Override public FluentIterable map(Function function) { return new LazyFluentIterable() { @Override public Iterator iterator() { return new DecoratingIterator(null) { Iterator oldTypeIterator = iterable.iterator(); @Override public T computeNext() { if (oldTypeIterator.hasNext()) { E candidate = oldTypeIterator.next(); return function.apply(candidate); } else { return null; } } }; } }; } /** * Collects all remaining objects of this iteration into a list. * * @return a list with all remaining objects of this iteration */ @Override public List asList() { return FluentIterable.copyToList(iterable); } @Override public Iterator iterator() { return new DecoratingIterator(iterable.iterator()) { @Override public E computeNext() { return fromIterator.hasNext() ? fromIterator.next() : null; } }; } /** * @return a FluentIterable from a given iterable. Calls the LazyFluentIterable constructor. */ public static final FluentIterable from(Iterable iterable) { return new LazyFluentIterable<>(iterable); } } simple/000077500000000000000000000000001322244523500354465ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/src/main/java/com/iluwatar/fluentinterface/fluentiterableSimpleFluentIterable.java000066400000000000000000000153711322244523500423770ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/src/main/java/com/iluwatar/fluentinterface/fluentiterable/simple/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.fluentinterface.fluentiterable.simple; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.Optional; import java.util.Spliterator; import java.util.function.Consumer; import java.util.function.Function; import java.util.function.Predicate; import com.iluwatar.fluentinterface.fluentiterable.FluentIterable; /** * This is a simple implementation of the FluentIterable interface. It evaluates all chained * operations eagerly. This implementation would be costly to be utilized in real applications. * * @param the type of the objects the iteration is about */ public class SimpleFluentIterable implements FluentIterable { private final Iterable iterable; /** * This constructor creates a copy of a given iterable's contents. * * @param iterable the iterable this interface copies to work on. */ protected SimpleFluentIterable(Iterable iterable) { this.iterable = iterable; } /** * Filters the contents of Iterable using the given predicate, leaving only the ones which satisfy * the predicate. * * @param predicate the condition to test with for the filtering. If the test is negative, the * tested object is removed by the iterator. * @return the same FluentIterable with a filtered collection */ @Override public final FluentIterable filter(Predicate predicate) { Iterator iterator = iterator(); while (iterator.hasNext()) { E nextElement = iterator.next(); if (!predicate.test(nextElement)) { iterator.remove(); } } return this; } /** * Can be used to collect objects from the Iterable. Is a terminating operation. * * @return an option of the first object of the Iterable */ @Override public final Optional first() { Iterator resultIterator = first(1).iterator(); return resultIterator.hasNext() ? Optional.of(resultIterator.next()) : Optional.empty(); } /** * Can be used to collect objects from the Iterable. Is a terminating operation. * * @param count defines the number of objects to return * @return the same FluentIterable with a collection decimated to a maximum of 'count' first * objects. */ @Override public final FluentIterable first(int count) { Iterator iterator = iterator(); int currentCount = 0; while (iterator.hasNext()) { iterator.next(); if (currentCount >= count) { iterator.remove(); } currentCount++; } return this; } /** * Can be used to collect objects from the Iterable. Is a terminating operation. * * @return an option of the last object of the Iterable */ @Override public final Optional last() { List list = last(1).asList(); if (list.isEmpty()) { return Optional.empty(); } return Optional.of(list.get(0)); } /** * Can be used to collect objects from the Iterable. Is a terminating operation. * * @param count defines the number of objects to return * @return the same FluentIterable with a collection decimated to a maximum of 'count' last * objects */ @Override public final FluentIterable last(int count) { int remainingElementsCount = getRemainingElementsCount(); Iterator iterator = iterator(); int currentIndex = 0; while (iterator.hasNext()) { iterator.next(); if (currentIndex < remainingElementsCount - count) { iterator.remove(); } currentIndex++; } return this; } /** * Transforms this FluentIterable into a new one containing objects of the type T. * * @param function a function that transforms an instance of E into an instance of T * @param the target type of the transformation * @return a new FluentIterable of the new type */ @Override public final FluentIterable map(Function function) { List temporaryList = new ArrayList<>(); Iterator iterator = iterator(); while (iterator.hasNext()) { temporaryList.add(function.apply(iterator.next())); } return from(temporaryList); } /** * Collects all remaining objects of this Iterable into a list. * * @return a list with all remaining objects of this Iterable */ @Override public List asList() { return toList(iterable.iterator()); } /** * @return a FluentIterable from a given iterable. Calls the SimpleFluentIterable constructor. */ public static final FluentIterable from(Iterable iterable) { return new SimpleFluentIterable<>(iterable); } public static final FluentIterable fromCopyOf(Iterable iterable) { List copy = FluentIterable.copyToList(iterable); return new SimpleFluentIterable<>(copy); } @Override public Iterator iterator() { return iterable.iterator(); } @Override public void forEach(Consumer action) { iterable.forEach(action); } @Override public Spliterator spliterator() { return iterable.spliterator(); } /** * @return the count of remaining objects of the current Iterable */ public final int getRemainingElementsCount() { int counter = 0; Iterator iterator = iterator(); while (iterator.hasNext()) { iterator.next(); counter++; } return counter; } /** * Collects the remaining objects of the given iterator into a List. * * @return a new List with the remaining objects. */ public static List toList(Iterator iterator) { List copy = new ArrayList<>(); while (iterator.hasNext()) { copy.add(iterator.next()); } return copy; } } java-design-patterns-1.18.0/fluentinterface/src/test/000077500000000000000000000000001322244523500225555ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/src/test/java/000077500000000000000000000000001322244523500234765ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/src/test/java/com/000077500000000000000000000000001322244523500242545ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500261045ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/src/test/java/com/iluwatar/fluentinterface/000077500000000000000000000000001322244523500312625ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/src/test/java/com/iluwatar/fluentinterface/app/000077500000000000000000000000001322244523500320425ustar00rootroot00000000000000AppTest.java000066400000000000000000000025231322244523500342100ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/src/test/java/com/iluwatar/fluentinterface/app/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.fluentinterface.app; import org.junit.jupiter.api.Test; /** * Application Test Entry */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } fluentiterable/000077500000000000000000000000001322244523500342105ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/src/test/java/com/iluwatar/fluentinterfaceFluentIterableTest.java000066400000000000000000000154611322244523500406270ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/src/test/java/com/iluwatar/fluentinterface/fluentiterable/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.fluentinterface.fluentiterable; import org.junit.jupiter.api.Test; import java.util.Arrays; import java.util.Collections; import java.util.List; import java.util.Optional; import java.util.Spliterator; import java.util.function.Consumer; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertTrue; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/12/15 - 7:00 PM * * @author Jeroen Meulemeester */ public abstract class FluentIterableTest { /** * Create a new {@link FluentIterable} from the given integers * * @param integers The integers * @return The new iterable, use for testing */ protected abstract FluentIterable createFluentIterable(final Iterable integers); @Test public void testFirst() throws Exception { final List integers = Arrays.asList(1, 2, 3, 10, 9, 8); final Optional first = createFluentIterable(integers).first(); assertNotNull(first); assertTrue(first.isPresent()); assertEquals(integers.get(0), first.get()); } @Test public void testFirstEmptyCollection() throws Exception { final List integers = Collections.emptyList(); final Optional first = createFluentIterable(integers).first(); assertNotNull(first); assertFalse(first.isPresent()); } @Test public void testFirstCount() throws Exception { final List integers = Arrays.asList(1, 2, 3, 10, 9, 8); final List first4 = createFluentIterable(integers) .first(4) .asList(); assertNotNull(first4); assertEquals(4, first4.size()); assertEquals(integers.get(0), first4.get(0)); assertEquals(integers.get(1), first4.get(1)); assertEquals(integers.get(2), first4.get(2)); assertEquals(integers.get(3), first4.get(3)); } @Test public void testFirstCountLessItems() throws Exception { final List integers = Arrays.asList(1, 2, 3); final List first4 = createFluentIterable(integers) .first(4) .asList(); assertNotNull(first4); assertEquals(3, first4.size()); assertEquals(integers.get(0), first4.get(0)); assertEquals(integers.get(1), first4.get(1)); assertEquals(integers.get(2), first4.get(2)); } @Test public void testLast() throws Exception { final List integers = Arrays.asList(1, 2, 3, 10, 9, 8); final Optional last = createFluentIterable(integers).last(); assertNotNull(last); assertTrue(last.isPresent()); assertEquals(integers.get(integers.size() - 1), last.get()); } @Test public void testLastEmptyCollection() throws Exception { final List integers = Collections.emptyList(); final Optional last = createFluentIterable(integers).last(); assertNotNull(last); assertFalse(last.isPresent()); } @Test public void testLastCount() throws Exception { final List integers = Arrays.asList(1, 2, 3, 10, 9, 8); final List last4 = createFluentIterable(integers) .last(4) .asList(); assertNotNull(last4); assertEquals(4, last4.size()); assertEquals(Integer.valueOf(3), last4.get(0)); assertEquals(Integer.valueOf(10), last4.get(1)); assertEquals(Integer.valueOf(9), last4.get(2)); assertEquals(Integer.valueOf(8), last4.get(3)); } @Test public void testLastCountLessItems() throws Exception { final List integers = Arrays.asList(1, 2, 3); final List last4 = createFluentIterable(integers) .last(4) .asList(); assertNotNull(last4); assertEquals(3, last4.size()); assertEquals(Integer.valueOf(1), last4.get(0)); assertEquals(Integer.valueOf(2), last4.get(1)); assertEquals(Integer.valueOf(3), last4.get(2)); } @Test public void testFilter() throws Exception { final List integers = Arrays.asList(1, 2, 3, 10, 9, 8); final List evenItems = createFluentIterable(integers) .filter(i -> i % 2 == 0) .asList(); assertNotNull(evenItems); assertEquals(3, evenItems.size()); assertEquals(Integer.valueOf(2), evenItems.get(0)); assertEquals(Integer.valueOf(10), evenItems.get(1)); assertEquals(Integer.valueOf(8), evenItems.get(2)); } @Test public void testMap() throws Exception { final List integers = Arrays.asList(1, 2, 3); final List longs = createFluentIterable(integers) .map(Integer::longValue) .asList(); assertNotNull(longs); assertEquals(integers.size(), longs.size()); assertEquals(Long.valueOf(1), longs.get(0)); assertEquals(Long.valueOf(2), longs.get(1)); assertEquals(Long.valueOf(3), longs.get(2)); } @Test public void testForEach() throws Exception { final List integers = Arrays.asList(1, 2, 3); final Consumer consumer = mock(Consumer.class); createFluentIterable(integers).forEach(consumer); verify(consumer, times(1)).accept(Integer.valueOf(1)); verify(consumer, times(1)).accept(Integer.valueOf(2)); verify(consumer, times(1)).accept(Integer.valueOf(3)); verifyNoMoreInteractions(consumer); } @Test public void testSpliterator() throws Exception { final List integers = Arrays.asList(1, 2, 3); final Spliterator split = createFluentIterable(integers).spliterator(); assertNotNull(split); } }lazy/000077500000000000000000000000001322244523500351675ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/src/test/java/com/iluwatar/fluentinterface/fluentiterableLazyFluentIterableTest.java000066400000000000000000000031371322244523500424430ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/src/test/java/com/iluwatar/fluentinterface/fluentiterable/lazy/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.fluentinterface.fluentiterable.lazy; import com.iluwatar.fluentinterface.fluentiterable.FluentIterable; import com.iluwatar.fluentinterface.fluentiterable.FluentIterableTest; /** * Date: 12/12/15 - 7:56 PM * * @author Jeroen Meulemeester */ public class LazyFluentIterableTest extends FluentIterableTest { @Override protected FluentIterable createFluentIterable(Iterable integers) { return LazyFluentIterable.from(integers); } } simple/000077500000000000000000000000001322244523500355015ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/src/test/java/com/iluwatar/fluentinterface/fluentiterableSimpleFluentIterableTest.java000066400000000000000000000031531322244523500432650ustar00rootroot00000000000000java-design-patterns-1.18.0/fluentinterface/src/test/java/com/iluwatar/fluentinterface/fluentiterable/simple/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.fluentinterface.fluentiterable.simple; import com.iluwatar.fluentinterface.fluentiterable.FluentIterable; import com.iluwatar.fluentinterface.fluentiterable.FluentIterableTest; /** * Date: 12/12/15 - 7:56 PM * * @author Jeroen Meulemeester */ public class SimpleFluentIterableTest extends FluentIterableTest { @Override protected FluentIterable createFluentIterable(Iterable integers) { return SimpleFluentIterable.fromCopyOf(integers); } } java-design-patterns-1.18.0/flux/000077500000000000000000000000001322244523500166075ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/README.md000066400000000000000000000014751322244523500200750ustar00rootroot00000000000000--- layout: pattern title: Flux folder: flux permalink: /patterns/flux/ categories: Presentation Tier tags: - Java - Difficulty-Intermediate --- ## Intent Flux eschews MVC in favor of a unidirectional data flow. 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A`#OYAg :zIENDB`java-design-patterns-1.18.0/flux/etc/flux.ucls000066400000000000000000000321721322244523500212350ustar00rootroot00000000000000 java-design-patterns-1.18.0/flux/pom.xml000066400000000000000000000040571322244523500201320ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 flux org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.mockito mockito-core test java-design-patterns-1.18.0/flux/src/000077500000000000000000000000001322244523500173765ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/main/000077500000000000000000000000001322244523500203225ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/main/java/000077500000000000000000000000001322244523500212435ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/main/java/com/000077500000000000000000000000001322244523500220215ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500236515ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/000077500000000000000000000000001322244523500246275ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/action/000077500000000000000000000000001322244523500261045ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/action/Action.java000066400000000000000000000026531322244523500301720ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.action; /** * * Action is the data payload dispatched to the stores when something happens. * */ public abstract class Action { private ActionType type; public Action(ActionType type) { this.type = type; } public ActionType getType() { return type; } } java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/action/ActionType.java000066400000000000000000000024041322244523500310260ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.action; /** * * Types of actions. * */ public enum ActionType { MENU_ITEM_SELECTED, CONTENT_CHANGED; } java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/action/Content.java000066400000000000000000000027771322244523500303760ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.action; /** * * Content items. * */ public enum Content { PRODUCTS("Products - This page lists the company's products."), COMPANY( "Company - This page displays information about the company."); private String title; private Content(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/action/ContentAction.java000066400000000000000000000027071322244523500315250ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.action; /** * * ContentAction is a concrete action. * */ public class ContentAction extends Action { private Content content; public ContentAction(Content content) { super(ActionType.CONTENT_CHANGED); this.content = content; } public Content getContent() { return content; } } java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/action/MenuAction.java000066400000000000000000000027131322244523500310140ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.action; /** * * MenuAction is a concrete action. * */ public class MenuAction extends Action { private MenuItem menuItem; public MenuAction(MenuItem menuItem) { super(ActionType.MENU_ITEM_SELECTED); this.menuItem = menuItem; } public MenuItem getMenuItem() { return menuItem; } } java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/action/MenuItem.java000066400000000000000000000026371322244523500305020ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.action; /** * * Menu items. * */ public enum MenuItem { HOME("Home"), PRODUCTS("Products"), COMPANY("Company"); private String title; MenuItem(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/app/000077500000000000000000000000001322244523500254075ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/app/App.java000066400000000000000000000060101322244523500267670ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.app; import com.iluwatar.flux.action.MenuItem; import com.iluwatar.flux.dispatcher.Dispatcher; import com.iluwatar.flux.store.ContentStore; import com.iluwatar.flux.store.MenuStore; import com.iluwatar.flux.view.ContentView; import com.iluwatar.flux.view.MenuView; /** * * Flux is the application architecture that Facebook uses for building client-side web * applications. Flux eschews MVC in favor of a unidirectional data flow. When a user interacts with * a React view, the view propagates an action through a central dispatcher, to the various stores * that hold the application's data and business logic, which updates all of the views that are * affected. *

* This example has two views: menu and content. They represent typical main menu and content area * of a web page. When menu item is clicked it triggers events through the dispatcher. The events * are received and handled by the stores updating their data as needed. The stores then notify the * views that they should rerender themselves. *

* http://facebook.github.io/flux/docs/overview.html * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { // initialize and wire the system MenuStore menuStore = new MenuStore(); Dispatcher.getInstance().registerStore(menuStore); ContentStore contentStore = new ContentStore(); Dispatcher.getInstance().registerStore(contentStore); MenuView menuView = new MenuView(); menuStore.registerView(menuView); ContentView contentView = new ContentView(); contentStore.registerView(contentView); // render initial view menuView.render(); contentView.render(); // user clicks another menu item // this triggers action dispatching and eventually causes views to render with new content menuView.itemClicked(MenuItem.COMPANY); } } java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/dispatcher/000077500000000000000000000000001322244523500267555ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/dispatcher/Dispatcher.java000066400000000000000000000045151322244523500317130ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.dispatcher; import java.util.LinkedList; import java.util.List; import com.iluwatar.flux.action.Action; import com.iluwatar.flux.action.Content; import com.iluwatar.flux.action.ContentAction; import com.iluwatar.flux.action.MenuAction; import com.iluwatar.flux.action.MenuItem; import com.iluwatar.flux.store.Store; /** * * Dispatcher sends Actions to registered Stores. * */ public final class Dispatcher { private static Dispatcher instance = new Dispatcher(); private List stores = new LinkedList<>(); private Dispatcher() {} public static Dispatcher getInstance() { return instance; } public void registerStore(Store store) { stores.add(store); } /** * Menu item selected handler */ public void menuItemSelected(MenuItem menuItem) { dispatchAction(new MenuAction(menuItem)); switch (menuItem) { case HOME: case PRODUCTS: default: dispatchAction(new ContentAction(Content.PRODUCTS)); break; case COMPANY: dispatchAction(new ContentAction(Content.COMPANY)); break; } } private void dispatchAction(Action action) { stores.stream().forEach(store -> store.onAction(action)); } } java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/store/000077500000000000000000000000001322244523500257635ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/store/ContentStore.java000066400000000000000000000034141322244523500312570ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.store; import com.iluwatar.flux.action.Action; import com.iluwatar.flux.action.ActionType; import com.iluwatar.flux.action.Content; import com.iluwatar.flux.action.ContentAction; /** * * ContentStore is a concrete store. * */ public class ContentStore extends Store { private Content content = Content.PRODUCTS; @Override public void onAction(Action action) { if (action.getType().equals(ActionType.CONTENT_CHANGED)) { ContentAction contentAction = (ContentAction) action; content = contentAction.getContent(); notifyChange(); } } public Content getContent() { return content; } } java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/store/MenuStore.java000066400000000000000000000033771322244523500305610ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.store; import com.iluwatar.flux.action.Action; import com.iluwatar.flux.action.ActionType; import com.iluwatar.flux.action.MenuAction; import com.iluwatar.flux.action.MenuItem; /** * * MenuStore is a concrete store. * */ public class MenuStore extends Store { private MenuItem selected = MenuItem.HOME; @Override public void onAction(Action action) { if (action.getType().equals(ActionType.MENU_ITEM_SELECTED)) { MenuAction menuAction = (MenuAction) action; selected = menuAction.getMenuItem(); notifyChange(); } } public MenuItem getSelected() { return selected; } } java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/store/Store.java000066400000000000000000000031571322244523500277300ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.store; import java.util.LinkedList; import java.util.List; import com.iluwatar.flux.action.Action; import com.iluwatar.flux.view.View; /** * * Store is a data model. * */ public abstract class Store { private List views = new LinkedList<>(); public abstract void onAction(Action action); public void registerView(View view) { views.add(view); } protected void notifyChange() { views.stream().forEach(view -> view.storeChanged(this)); } } java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/view/000077500000000000000000000000001322244523500256015ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/view/ContentView.java000066400000000000000000000034511322244523500307140ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.view; import com.iluwatar.flux.action.Content; import com.iluwatar.flux.store.ContentStore; import com.iluwatar.flux.store.Store; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * ContentView is a concrete view. * */ public class ContentView implements View { private static final Logger LOGGER = LoggerFactory.getLogger(ContentView.class); private Content content = Content.PRODUCTS; @Override public void storeChanged(Store store) { ContentStore contentStore = (ContentStore) store; content = contentStore.getContent(); render(); } @Override public void render() { LOGGER.info(content.toString()); } } java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/view/MenuView.java000066400000000000000000000040721322244523500302060ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.view; import com.iluwatar.flux.action.MenuItem; import com.iluwatar.flux.dispatcher.Dispatcher; import com.iluwatar.flux.store.MenuStore; import com.iluwatar.flux.store.Store; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * MenuView is a concrete view. * */ public class MenuView implements View { private static final Logger LOGGER = LoggerFactory.getLogger(MenuView.class); private MenuItem selected = MenuItem.HOME; @Override public void storeChanged(Store store) { MenuStore menuStore = (MenuStore) store; selected = menuStore.getSelected(); render(); } @Override public void render() { for (MenuItem item : MenuItem.values()) { if (selected.equals(item)) { LOGGER.info("* {}", item); } else { LOGGER.info(item.toString()); } } } public void itemClicked(MenuItem item) { Dispatcher.getInstance().menuItemSelected(item); } } java-design-patterns-1.18.0/flux/src/main/java/com/iluwatar/flux/view/View.java000066400000000000000000000025131322244523500273570ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.view; import com.iluwatar.flux.store.Store; /** * * Views define the representation of data. * */ public interface View { void storeChanged(Store store); void render(); } java-design-patterns-1.18.0/flux/src/test/000077500000000000000000000000001322244523500203555ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/test/java/000077500000000000000000000000001322244523500212765ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/test/java/com/000077500000000000000000000000001322244523500220545ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500237045ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/test/java/com/iluwatar/flux/000077500000000000000000000000001322244523500246625ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/test/java/com/iluwatar/flux/action/000077500000000000000000000000001322244523500261375ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/test/java/com/iluwatar/flux/action/ContentTest.java000066400000000000000000000032271322244523500312600ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.action; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertNotNull; /** * Date: 12/12/15 - 10:11 PM * * @author Jeroen Meulemeester */ public class ContentTest { @Test public void testToString() throws Exception { for (final Content content : Content.values()) { final String toString = content.toString(); assertNotNull(toString); assertFalse(toString.trim().isEmpty()); } } } java-design-patterns-1.18.0/flux/src/test/java/com/iluwatar/flux/action/MenuItemTest.java000066400000000000000000000032341322244523500313670ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.action; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertNotNull; /** * Date: 12/12/15 - 10:15 PM * * @author Jeroen Meulemeester */ public class MenuItemTest { @Test public void testToString() throws Exception { for (final MenuItem menuItem : MenuItem.values()) { final String toString = menuItem.toString(); assertNotNull(toString); assertFalse(toString.trim().isEmpty()); } } } java-design-patterns-1.18.0/flux/src/test/java/com/iluwatar/flux/app/000077500000000000000000000000001322244523500254425ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/test/java/com/iluwatar/flux/app/AppTest.java000066400000000000000000000025111322244523500276640ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.app; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/flux/src/test/java/com/iluwatar/flux/dispatcher/000077500000000000000000000000001322244523500270105ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/test/java/com/iluwatar/flux/dispatcher/DispatcherTest.java000066400000000000000000000107551322244523500326110ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.dispatcher; import com.iluwatar.flux.action.Action; import com.iluwatar.flux.action.ActionType; import com.iluwatar.flux.action.Content; import com.iluwatar.flux.action.ContentAction; import com.iluwatar.flux.action.MenuAction; import com.iluwatar.flux.action.MenuItem; import com.iluwatar.flux.store.Store; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.mockito.ArgumentCaptor; import java.lang.reflect.Constructor; import java.lang.reflect.Field; import java.util.List; import java.util.stream.Collectors; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertSame; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/12/15 - 8:22 PM * * @author Jeroen Meulemeester */ public class DispatcherTest { /** * Dispatcher is a singleton with no way to reset it's internal state back to the beginning. * Replace the instance with a fresh one before each test to make sure test cases have no * influence on each other. */ @BeforeEach public void setUp() throws Exception { final Constructor constructor; constructor = Dispatcher.class.getDeclaredConstructor(); constructor.setAccessible(true); final Field field = Dispatcher.class.getDeclaredField("instance"); field.setAccessible(true); field.set(Dispatcher.getInstance(), constructor.newInstance()); } @Test public void testGetInstance() throws Exception { assertNotNull(Dispatcher.getInstance()); assertSame(Dispatcher.getInstance(), Dispatcher.getInstance()); } @Test public void testMenuItemSelected() throws Exception { final Dispatcher dispatcher = Dispatcher.getInstance(); final Store store = mock(Store.class); dispatcher.registerStore(store); dispatcher.menuItemSelected(MenuItem.HOME); dispatcher.menuItemSelected(MenuItem.COMPANY); // We expect 4 events, 2 menu selections and 2 content change actions final ArgumentCaptor actionCaptor = ArgumentCaptor.forClass(Action.class); verify(store, times(4)).onAction(actionCaptor.capture()); verifyNoMoreInteractions(store); final List actions = actionCaptor.getAllValues(); final List menuActions = actions.stream() .filter(a -> a.getType().equals(ActionType.MENU_ITEM_SELECTED)) .map(a -> (MenuAction) a) .collect(Collectors.toList()); final List contentActions = actions.stream() .filter(a -> a.getType().equals(ActionType.CONTENT_CHANGED)) .map(a -> (ContentAction) a) .collect(Collectors.toList()); assertEquals(2, menuActions.size()); assertEquals(1, menuActions.stream().map(MenuAction::getMenuItem).filter(MenuItem.HOME::equals).count()); assertEquals(1, menuActions.stream().map(MenuAction::getMenuItem).filter(MenuItem.COMPANY::equals).count()); assertEquals(2, contentActions.size()); assertEquals(1, contentActions.stream().map(ContentAction::getContent).filter(Content.PRODUCTS::equals).count()); assertEquals(1, contentActions.stream().map(ContentAction::getContent).filter(Content.COMPANY::equals).count()); } } java-design-patterns-1.18.0/flux/src/test/java/com/iluwatar/flux/store/000077500000000000000000000000001322244523500260165ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/test/java/com/iluwatar/flux/store/ContentStoreTest.java000066400000000000000000000047361322244523500321620ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.store; import com.iluwatar.flux.action.Content; import com.iluwatar.flux.action.ContentAction; import com.iluwatar.flux.action.MenuAction; import com.iluwatar.flux.action.MenuItem; import com.iluwatar.flux.view.View; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyZeroInteractions; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/12/15 - 10:18 PM * * @author Jeroen Meulemeester */ public class ContentStoreTest { @Test public void testOnAction() throws Exception { final ContentStore contentStore = new ContentStore(); final View view = mock(View.class); contentStore.registerView(view); verifyZeroInteractions(view); // Content should not react on menu action ... contentStore.onAction(new MenuAction(MenuItem.PRODUCTS)); verifyZeroInteractions(view); // ... but it should react on a content action contentStore.onAction(new ContentAction(Content.COMPANY)); verify(view, times(1)).storeChanged(eq(contentStore)); verifyNoMoreInteractions(view); assertEquals(Content.COMPANY, contentStore.getContent()); } } java-design-patterns-1.18.0/flux/src/test/java/com/iluwatar/flux/store/MenuStoreTest.java000066400000000000000000000047031322244523500314460ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.store; import com.iluwatar.flux.action.Content; import com.iluwatar.flux.action.ContentAction; import com.iluwatar.flux.action.MenuAction; import com.iluwatar.flux.action.MenuItem; import com.iluwatar.flux.view.View; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyZeroInteractions; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/12/15 - 10:18 PM * * @author Jeroen Meulemeester */ public class MenuStoreTest { @Test public void testOnAction() throws Exception { final MenuStore menuStore = new MenuStore(); final View view = mock(View.class); menuStore.registerView(view); verifyZeroInteractions(view); // Menu should not react on content action ... menuStore.onAction(new ContentAction(Content.COMPANY)); verifyZeroInteractions(view); // ... but it should react on a menu action menuStore.onAction(new MenuAction(MenuItem.PRODUCTS)); verify(view, times(1)).storeChanged(eq(menuStore)); verifyNoMoreInteractions(view); assertEquals(MenuItem.PRODUCTS, menuStore.getSelected()); } } java-design-patterns-1.18.0/flux/src/test/java/com/iluwatar/flux/view/000077500000000000000000000000001322244523500256345ustar00rootroot00000000000000java-design-patterns-1.18.0/flux/src/test/java/com/iluwatar/flux/view/ContentViewTest.java000066400000000000000000000036611322244523500316120ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.view; import com.iluwatar.flux.action.Content; import com.iluwatar.flux.store.ContentStore; import org.junit.jupiter.api.Test; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.when; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/12/15 - 10:31 PM * * @author Jeroen Meulemeester */ public class ContentViewTest { @Test public void testStoreChanged() throws Exception { final ContentStore store = mock(ContentStore.class); when(store.getContent()).thenReturn(Content.PRODUCTS); final ContentView view = new ContentView(); view.storeChanged(store); verify(store, times(1)).getContent(); verifyNoMoreInteractions(store); } } java-design-patterns-1.18.0/flux/src/test/java/com/iluwatar/flux/view/MenuViewTest.java000066400000000000000000000046741322244523500311110ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flux.view; import com.iluwatar.flux.action.Action; import com.iluwatar.flux.action.MenuItem; import com.iluwatar.flux.dispatcher.Dispatcher; import com.iluwatar.flux.store.MenuStore; import com.iluwatar.flux.store.Store; import org.junit.jupiter.api.Test; import static org.mockito.Matchers.any; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.when; /** * Date: 12/12/15 - 10:31 PM * * @author Jeroen Meulemeester */ public class MenuViewTest { @Test public void testStoreChanged() throws Exception { final MenuStore store = mock(MenuStore.class); when(store.getSelected()).thenReturn(MenuItem.HOME); final MenuView view = new MenuView(); view.storeChanged(store); verify(store, times(1)).getSelected(); verifyNoMoreInteractions(store); } @Test public void testItemClicked() throws Exception { final Store store = mock(Store.class); Dispatcher.getInstance().registerStore(store); final MenuView view = new MenuView(); view.itemClicked(MenuItem.PRODUCTS); // We should receive a menu click action and a content changed action verify(store, times(2)).onAction(any(Action.class)); } } java-design-patterns-1.18.0/flyweight/000077500000000000000000000000001322244523500176335ustar00rootroot00000000000000java-design-patterns-1.18.0/flyweight/README.md000066400000000000000000000104261322244523500211150ustar00rootroot00000000000000--- layout: pattern title: Flyweight folder: flyweight permalink: /patterns/flyweight/ categories: Structural tags: - Java - Gang Of Four - Difficulty-Intermediate - Performance --- ## Intent Use sharing to support large numbers of fine-grained objects efficiently. ## Explanation Real world example > Alchemist's shop has shelves full of magic potions. Many of the potions are the same so there is no need to create new object for each of them. Instead one object instance can represent multiple shelf items so memory footprint remains small. In plain words > It is used to minimize memory usage or computational expenses by sharing as much as possible with similar objects. Wikipedia says > In computer programming, flyweight is a software design pattern. A flyweight is an object that minimizes memory use by sharing as much data as possible with other similar objects; it is a way to use objects in large numbers when a simple repeated representation would use an unacceptable amount of memory. **Programmatic example** Translating our alchemist shop example from above. First of all we have different potion types ``` public interface Potion { void drink(); } public class HealingPotion implements Potion { private static final Logger LOGGER = LoggerFactory.getLogger(HealingPotion.class); @Override public void drink() { LOGGER.info("You feel healed. (Potion={})", System.identityHashCode(this)); } } public class HolyWaterPotion implements Potion { private static final Logger LOGGER = LoggerFactory.getLogger(HolyWaterPotion.class); @Override public void drink() { LOGGER.info("You feel blessed. (Potion={})", System.identityHashCode(this)); } } public class InvisibilityPotion implements Potion { private static final Logger LOGGER = LoggerFactory.getLogger(InvisibilityPotion.class); @Override public void drink() { LOGGER.info("You become invisible. (Potion={})", System.identityHashCode(this)); } } ``` Then the actual Flyweight object which is the factory for creating potions ``` public class PotionFactory { private final Map potions; public PotionFactory() { potions = new EnumMap<>(PotionType.class); } Potion createPotion(PotionType type) { Potion potion = potions.get(type); if (potion == null) { switch (type) { case HEALING: potion = new HealingPotion(); potions.put(type, potion); break; case HOLY_WATER: potion = new HolyWaterPotion(); potions.put(type, potion); break; case INVISIBILITY: potion = new InvisibilityPotion(); potions.put(type, potion); break; default: break; } } return potion; } } ``` And it can be used as below ``` PotionFactory factory = new PotionFactory(); factory.createPotion(PotionType.INVISIBILITY).drink(); // You become invisible. (Potion=6566818) factory.createPotion(PotionType.HEALING).drink(); // You feel healed. (Potion=648129364) factory.createPotion(PotionType.INVISIBILITY).drink(); // You become invisible. (Potion=6566818) factory.createPotion(PotionType.HOLY_WATER).drink(); // You feel blessed. (Potion=1104106489) factory.createPotion(PotionType.HOLY_WATER).drink(); // You feel blessed. (Potion=1104106489) factory.createPotion(PotionType.HEALING).drink(); // You feel healed. (Potion=648129364) ``` ## Applicability The Flyweight pattern's effectiveness depends heavily on how and where it's used. Apply the Flyweight pattern when all of the following are true * an application uses a large number of objects * storage costs are high because of the sheer quantity of objects * most object state can be made extrinsic * many groups of objects may be replaced by relatively few shared objects once extrinsic state is removed * the application doesn't depend on object identity. Since flyweight objects may be shared, identity tests will return true for conceptually distinct objects. ## Real world examples * [java.lang.Integer#valueOf(int)](http://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html#valueOf%28int%29) and similarly for Byte, Character and other wrapped types. ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.18.0/flyweight/pom.xml000066400000000000000000000036461322244523500211610ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 flyweight org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/flyweight/src/000077500000000000000000000000001322244523500204225ustar00rootroot00000000000000java-design-patterns-1.18.0/flyweight/src/main/000077500000000000000000000000001322244523500213465ustar00rootroot00000000000000java-design-patterns-1.18.0/flyweight/src/main/java/000077500000000000000000000000001322244523500222675ustar00rootroot00000000000000java-design-patterns-1.18.0/flyweight/src/main/java/com/000077500000000000000000000000001322244523500230455ustar00rootroot00000000000000java-design-patterns-1.18.0/flyweight/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500246755ustar00rootroot00000000000000java-design-patterns-1.18.0/flyweight/src/main/java/com/iluwatar/flyweight/000077500000000000000000000000001322244523500266775ustar00rootroot00000000000000java-design-patterns-1.18.0/flyweight/src/main/java/com/iluwatar/flyweight/AlchemistShop.java000066400000000000000000000065161322244523500323150ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flyweight; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.ArrayList; import java.util.Collections; import java.util.List; /** * * AlchemistShop holds potions on its shelves. It uses PotionFactory to provide the potions. * */ public class AlchemistShop { private static final Logger LOGGER = LoggerFactory.getLogger(AlchemistShop.class); private List topShelf; private List bottomShelf; /** * Constructor */ public AlchemistShop() { topShelf = new ArrayList<>(); bottomShelf = new ArrayList<>(); fillShelves(); } private void fillShelves() { PotionFactory factory = new PotionFactory(); topShelf.add(factory.createPotion(PotionType.INVISIBILITY)); topShelf.add(factory.createPotion(PotionType.INVISIBILITY)); topShelf.add(factory.createPotion(PotionType.STRENGTH)); topShelf.add(factory.createPotion(PotionType.HEALING)); topShelf.add(factory.createPotion(PotionType.INVISIBILITY)); topShelf.add(factory.createPotion(PotionType.STRENGTH)); topShelf.add(factory.createPotion(PotionType.HEALING)); topShelf.add(factory.createPotion(PotionType.HEALING)); bottomShelf.add(factory.createPotion(PotionType.POISON)); bottomShelf.add(factory.createPotion(PotionType.POISON)); bottomShelf.add(factory.createPotion(PotionType.POISON)); bottomShelf.add(factory.createPotion(PotionType.HOLY_WATER)); bottomShelf.add(factory.createPotion(PotionType.HOLY_WATER)); } /** * Get a read-only list of all the items on the top shelf * * @return The top shelf potions */ public final List getTopShelf() { return Collections.unmodifiableList(this.topShelf); } /** * Get a read-only list of all the items on the bottom shelf * * @return The bottom shelf potions */ public final List getBottomShelf() { return Collections.unmodifiableList(this.bottomShelf); } /** * Enumerate potions */ public void enumerate() { LOGGER.info("Enumerating top shelf potions\n"); for (Potion p : topShelf) { p.drink(); } LOGGER.info("Enumerating bottom shelf potions\n"); for (Potion p : bottomShelf) { p.drink(); } } } java-design-patterns-1.18.0/flyweight/src/main/java/com/iluwatar/flyweight/App.java000066400000000000000000000040161322244523500302630ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flyweight; /** * * Flyweight pattern is useful when the program needs a huge amount of objects. It provides means to * decrease resource usage by sharing object instances. *

* In this example {@link AlchemistShop} has great amount of potions on its shelves. To fill the * shelves {@link AlchemistShop} uses {@link PotionFactory} (which represents the Flyweight in this * example). Internally {@link PotionFactory} holds a map of the potions and lazily creates new ones * when requested. *

* To enable safe sharing, between clients and threads, Flyweight objects must be immutable. * Flyweight objects are by definition value objects. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { AlchemistShop alchemistShop = new AlchemistShop(); alchemistShop.enumerate(); } } java-design-patterns-1.18.0/flyweight/src/main/java/com/iluwatar/flyweight/HealingPotion.java000066400000000000000000000027641322244523500323130ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flyweight; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * HealingPotion * */ public class HealingPotion implements Potion { private static final Logger LOGGER = LoggerFactory.getLogger(HealingPotion.class); @Override public void drink() { LOGGER.info("You feel healed. (Potion={})", System.identityHashCode(this)); } } java-design-patterns-1.18.0/flyweight/src/main/java/com/iluwatar/flyweight/HolyWaterPotion.java000066400000000000000000000027731322244523500326620ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flyweight; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * HolyWaterPotion * */ public class HolyWaterPotion implements Potion { private static final Logger LOGGER = LoggerFactory.getLogger(HolyWaterPotion.class); @Override public void drink() { LOGGER.info("You feel blessed. (Potion={})", System.identityHashCode(this)); } } java-design-patterns-1.18.0/flyweight/src/main/java/com/iluwatar/flyweight/InvisibilityPotion.java000066400000000000000000000030101322244523500334030ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flyweight; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * InvisibilityPotion * */ public class InvisibilityPotion implements Potion { private static final Logger LOGGER = LoggerFactory.getLogger(InvisibilityPotion.class); @Override public void drink() { LOGGER.info("You become invisible. (Potion={})", System.identityHashCode(this)); } } java-design-patterns-1.18.0/flyweight/src/main/java/com/iluwatar/flyweight/PoisonPotion.java000066400000000000000000000027711322244523500322110ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flyweight; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * PoisonPotion * */ public class PoisonPotion implements Potion { private static final Logger LOGGER = LoggerFactory.getLogger(PoisonPotion.class); @Override public void drink() { LOGGER.info("Urgh! This is poisonous. (Potion={})", System.identityHashCode(this)); } } java-design-patterns-1.18.0/flyweight/src/main/java/com/iluwatar/flyweight/Potion.java000066400000000000000000000024221322244523500310120ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flyweight; /** * * Interface for Potions. * */ public interface Potion { void drink(); } java-design-patterns-1.18.0/flyweight/src/main/java/com/iluwatar/flyweight/PotionFactory.java000066400000000000000000000046671322244523500323570ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flyweight; import java.util.EnumMap; import java.util.Map; /** * * PotionFactory is the Flyweight in this example. It minimizes memory use by sharing object * instances. It holds a map of potion instances and new potions are created only when none of the * type already exists. * */ public class PotionFactory { private final Map potions; public PotionFactory() { potions = new EnumMap<>(PotionType.class); } Potion createPotion(PotionType type) { Potion potion = potions.get(type); if (potion == null) { switch (type) { case HEALING: potion = new HealingPotion(); potions.put(type, potion); break; case HOLY_WATER: potion = new HolyWaterPotion(); potions.put(type, potion); break; case INVISIBILITY: potion = new InvisibilityPotion(); potions.put(type, potion); break; case POISON: potion = new PoisonPotion(); potions.put(type, potion); break; case STRENGTH: potion = new StrengthPotion(); potions.put(type, potion); break; default: break; } } return potion; } } java-design-patterns-1.18.0/flyweight/src/main/java/com/iluwatar/flyweight/PotionType.java000066400000000000000000000024751322244523500316640ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flyweight; /** * * Enumeration for potion types. * */ public enum PotionType { HEALING, INVISIBILITY, STRENGTH, HOLY_WATER, POISON } java-design-patterns-1.18.0/flyweight/src/main/java/com/iluwatar/flyweight/StrengthPotion.java000066400000000000000000000027671322244523500325450ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flyweight; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * StrengthPotion * */ public class StrengthPotion implements Potion { private static final Logger LOGGER = LoggerFactory.getLogger(StrengthPotion.class); @Override public void drink() { LOGGER.info("You feel strong. (Potion={})", System.identityHashCode(this)); } } java-design-patterns-1.18.0/flyweight/src/test/000077500000000000000000000000001322244523500214015ustar00rootroot00000000000000java-design-patterns-1.18.0/flyweight/src/test/java/000077500000000000000000000000001322244523500223225ustar00rootroot00000000000000java-design-patterns-1.18.0/flyweight/src/test/java/com/000077500000000000000000000000001322244523500231005ustar00rootroot00000000000000java-design-patterns-1.18.0/flyweight/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500247305ustar00rootroot00000000000000java-design-patterns-1.18.0/flyweight/src/test/java/com/iluwatar/flyweight/000077500000000000000000000000001322244523500267325ustar00rootroot00000000000000java-design-patterns-1.18.0/flyweight/src/test/java/com/iluwatar/flyweight/AlchemistShopTest.java000066400000000000000000000042201322244523500331760ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flyweight; import org.junit.jupiter.api.Test; import java.util.ArrayList; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; /** * Date: 12/12/15 - 10:54 PM * * @author Jeroen Meulemeester */ public class AlchemistShopTest { @Test public void testShop() throws Exception { final AlchemistShop shop = new AlchemistShop(); final List bottomShelf = shop.getBottomShelf(); assertNotNull(bottomShelf); assertEquals(5, bottomShelf.size()); final List topShelf = shop.getTopShelf(); assertNotNull(topShelf); assertEquals(8, topShelf.size()); final List allPotions = new ArrayList<>(); allPotions.addAll(topShelf); allPotions.addAll(bottomShelf); // There are 13 potion instances, but only 5 unique instance types assertEquals(13, allPotions.size()); assertEquals(5, allPotions.stream().map(System::identityHashCode).distinct().count()); } } java-design-patterns-1.18.0/flyweight/src/test/java/com/iluwatar/flyweight/AppTest.java000066400000000000000000000025121322244523500311550ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.flyweight; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/front-controller/000077500000000000000000000000001322244523500211425ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/README.md000066400000000000000000000023061322244523500224220ustar00rootroot00000000000000--- layout: pattern title: Front Controller folder: front-controller permalink: /patterns/front-controller/ categories: Presentation Tier tags: - Java - Difficulty-Intermediate --- ## Intent Introduce a common handler for all requests for a web site. This way we can encapsulate common functionality such as security, internationalization, routing and logging in a single place. ![alt text](./etc/front-controller.png "Front Controller") ## Applicability Use the Front Controller pattern when * you want to encapsulate common request handling functionality in single place * you want to implements dynamic request handling i.e. change routing without modifying code * make web server configuration portable, you only need to register the handler web server specific way ## Real world examples * [Apache Struts](https://struts.apache.org/) ## Credits * [J2EE Design Patterns](http://www.amazon.com/J2EE-Design-Patterns-William-Crawford/dp/0596004273/ref=sr_1_2) * [Presentation Tier Patterns](http://www.javagyan.com/tutorials/corej2eepatterns/presentation-tier-patterns) * [Patterns of Enterprise Application Architecture](http://www.amazon.com/Patterns-Enterprise-Application-Architecture-Martin/dp/0321127420) java-design-patterns-1.18.0/front-controller/etc/000077500000000000000000000000001322244523500217155ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/etc/front-controller.png000066400000000000000000000660301322244523500257410ustar00rootroot00000000000000PNG  IHDRCkIDATxml$y0A 'l͋rur82t"t>6BqG҆\ٲ80Ƣ,O-mJٱb`l&\\prD>jgS]U]:bGP~ Ђ^&s-hGFQA@ZQᨠQE-pT("qT{K\, Rzq GsT}juWQiE-d:nXo*kzsZ8*0G괕%kwREjV,V&9 1`דwI(Ӟ[2ؠjaɄ?K[#AZ;*(=cw0bY{=E G)dh0^nuSwsNm5qT`h@ GF6L]31}_ %ʤ;*hUOR~Nʹ-[s@Z(*Ҏ ,N߸lt۲щIuT Y)-WCUUP)ۤ l-h!T+uu{J-3Rvlʷc먒N~T0ޠE-8*7 ;!=Ao'o (RGT*xKVƻGTmg"2ՠtwiwW%C&2ij~Sw?t~es@Z(h@ 8*4  Z G-hGFQA@ZQᨠQE-vߛxǗbYਠ E-T>?F{^\yneF {q_͜٤Q9E-T쨄mz'__xr ,ֈlL\;D{gG0*h@ U:߻nRK}#|xUʻ5RҬyI!pT`h@ U:s=|;/x݁oq^\˻3ʩ VʭЊN+7fP]~=rpw/wD(wm琜&%Rӊq][o=QA@ZQ=sw>s};Xwu÷H''9x`%]:9w}ĨᨠaE-T\G5og^/|G,먤X;dq\ou{=לUګGP\y3_;gtIJX#-]ȻT/ɵJ7s\ZM~8*0 *{ŏ~b}ī~UJ9ԱN[% V3׮GFPxToGzU{n|I|ש5/LsT^oo^Q -h!Q\מ _E1ae\:sVРltǺ]qG{FNhzB${MKJ(?:.8*4Gu?~緟WLxm}wTRMOX77@Dߢ%{#Z_\# ?=[g#.8*4GGg^9sճ^ΊxU֖.9U8 FnUMIk,{* -h!Q[~nK8q++%QykI*\#%l (nԎʯ#ou -h!QE+u{JZ=ꨠE-dL{z+|X&dQQ-!]57R8d?sE?*GOGĂH.~֯x=oʊYij~zxe?.8*gILf>Q8*0qqTAt)􍙎kAZG5)UE0 GFPjb<33w{}}}wwsGU5jmmkt +pT8*qO9a]A-01hFdhOOOz=㮠bpT峵|`ffmu(\zujj*04@illl#G;?wyg{4VK8wdDv'O\^^lQ qUBfgg暙ko SRbګrQAQZݞpBM\= 9"Xw6Pzզvvv%h8*!eqmcaaass3Y&L;_PznnLIsNwy'}@^=z2x J5,ֽ;vJ*OO݃0^v3jʊ+DHcDž fggʵX `G+ܝr=7"aۉ?>}LpT133\?555U Gw`bbb.c*|@Y#m0ɴ gssnV#ױ;e K{ P8*鈋\ϡ%c1fuX `Nrg#wql J4SG|}q*k00@.C^&/0TI}`ԡ 8*lnn9r$!=1S8TVh#BpbP%``aY__ @*۶^_c5%c`aqPYCHԩS(Vr 9Rnփ[|tpT PPuA\z}qn6pX<7   !0AN*Yg Cspp8 uT,,,Ć%pQx?%*LP&tPG*  #GyC;3\Q Upf&&&bŭj4}ZPG5nc64qk۶,MG ԩSs7 "-ʪFV.* .Խ#P)x~fff6d :zuT lmakǏ3'`CQ,//OMMսuT㎮^^@Z <OE ? sq:WY Ow@>JpT` WQU[YX@9CUUe=h ~<Z 8h#]3[P&fff?^n*R䄣B*ZW?OJ0G-f]H.9YH UԖO< J0G-&sԩǏro꒓U06.22|KN)HjZ쬸yPBj/vvv=6KNv*vHjۇW\uePZƔ"V!d"꥜nmtV5~6v麼5L#F"%' P &\+FqHjUrGe6Ulnn[acI>u~EBfRgN/sj^y$f{i/|IMܦНC^Fh z+H># G`.)IVZnɳ^5;<QXEu4O=_W[uu{njK-h Q^Y+իW ohڠHLMMKI@hɧi"4y~&L=u7aIYבҢ=ӫuO+#Ez0!:UnDtA۬(/KnG6 X^^N'|+@C^G)#:|C*DI۸rܦ@Xy,0{t]'%' +(ɓA[9KN(@ $iR H.9H-JjPKeUH.9H-JjPK "@R+J@-If(T KN(@ $iR1H.9H-LjW^ߺ}d'bMei)SZ4BGuOԶ{x |홛hp(ڑ/TSUs8Ғi({7k!Eݶ:XR(QrY *dP$:*~w~/7{zyE\JIc㨆&aNey iur>2>JXR(,9Iu#MTֹ;9H-d;+o߿F/?$ y>&]I&*=FƔ0w~K5%HbU*j) c37+)eP${Zo}-W;_suoGū{|ɫtMB5rˑtۗ,^#Iy}W&z)o)ȘF:KX,( 绍Nb6ع TxTK)\pLL1%t֯G4:5R"tT7qOYQˍQa 飯j)B?XڒRG9M>WJ1*FOvzi~Lu Eha褦҇AĽ 79%5Mg?EʛMWWU[y,QƨH>u Eha*\hNj^>rz+#iWTi+Ue9k!j)O]rBZD'1uKѻYt)wtm$Uc\Ge6R %' B]ԐҕaԤ&q:.^АH{SSdU>%j6R %' d$̻C7g9)lLI^ RPo4aZJɍ@)rQhmbMPK "@R+J@-If(T KN(@ $iR1H.9H-9tk4aZJɍ=̥mbMPK "@R+J@-If(T KN(@ $÷n~??}2I4Pj$WP$'鯿Mg+X={R3 Z*%' aX'5@ b\]rBZ(ڊ{z狍bg5qV?nu$_KR3.o 伡PY*R-P͵ZǺ{530L \ U#6WYWpb#fE,5+E`"'N} DiTK)WZ37M~f G`.I'~;ypQ%" ]`^Yy,Yk#@2IEVIN:iD!*d$>;|;9bA+oPb/:mP^>ۆ+nWoJe%SjdtnU{^^Ww! p,KKU5Pj OS9eݹJY1#ئ9*R-PHrqrx~D7W$Ӄ G`.iI o?yX)G^TyD .Ñ˳b´&~Ju*n{}a^q#BJȺ`%~Jp 2}cj*vQj)BK*'P`Z‰H ``jQKZR{#39Y/zgſbeXvU$$S-DRZ'JedssxIԠDh+ L>JWȥŻ& 娌Qj)B.TN+5;eԄ0o.=WL$ GVIOTKneΞ~DVQ%)VR9dͺ{sTJB!yiڦID0vןKϽxOĔ'gߒ^cp~ Q+vo6YH 5|W(YR(9BJNJ='*%5osS_{ܙ xUj?vvXhUgXtSGBJpMOhJ&U_;&S- |\Qz"+R E$$LtNRJ&d$5^XPPLo%RxpI<|F^O_BJNY?."r@!ow)wR'~͓iTK)\wyzdԄ0fM0@ SBzDsTdZJ0ɍpTҘƘ0L &:*L/$7QKsZ8L i3(*R-`CT8*s!V^#Qj$WP$Hju%5@ b\]rBZ ՕL%Aru EhVWR3 Z*%' Z]I4Pj$WP$Kj'MDLbb=`=+(a% +R H"P~R+-҆>J(XR@r#|d'7p' %rA>J(XR@r#|d$>;|;9bA(L֙STX9S{JL.6%jfviH5[?\dҤk$JA yJ+H-%[/,>ſbeX83m,I7[m;mP oQSI.BΨzwi5%U\]Eh!-WΜ}_2R,Rݝ*% MOn +JkJid~*K(a% +R H"w?xߥ_񬑕ԼUfIK%[ºz<9HC>4FPBR-J>(@ iIG?繗N{c/ ׯ͋bn% ș}F꾐ER<vh(:ArQXEFзwrNoLfW9CE>}BD+>+CA3+iQU Ud$5^XPݥ܏۴:on·]GݗVU,x&\/mߥIH0j)$WWAZNj"~n`$ju 3 FR1H.9H-KR Jo*iR1H.9H-ARO&W[-a5%Aru EhfCXyD b\]rBZ ՕL%Aru EhVWR3 Z*%' 7`HAJЄj)$7 G,ߺwmV Y\s5o;Ɓ6@+ G d-S@& G S_ah Q4q_,)° JCh =Xw0,h|rF^NmV#0@#C{a(h9Q؏|(c"mV%0m⡥wZipTsq%`%֋W)0ZipTCMA( q}E@hrWZ[`67Pbm"mV (8*am"mV qݕ6@+v JM" ЊQG8M" ЊQ42@hn@ݷPZ[`8*ݷPZ[`8*awW(-0(66@+v GP@66@+v G8E@fw%v&Bhnhv&Bhn]hblnD(-0@QpTD(-0@㰻+mV }E@( q}E@hvwe" ЊohbpTEQ4ohbpT PZ[`67Pbm"mV (8*am"mV qݕ6@+v JM" ЊQ%tTSS? 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OesvK&CTm3,giqT`$h BIbJje;,UhҞLrW2YqvxyO/yW;9DI6G8*0 ի(VZe86mgNH,x(Q&QF+z7|Cmvmm!zZBx)awvvecʮ7.ݶlteRU<~qJ˕PUT6[@yirrRu}cccffF^wT}C V:Ǻ=WQ);6۱uTIE?*o"Bjeeeqq17Q_ ) z;yA]=bepT[2ޥX?*wj<fyyOb9X/Cg:A>=*JLxe9*gT}g G qԩ`ЙCf$pT`h(;Nߕ+WpT8*hh4=~wjj GF s8尸8==?8*4 0 6]\G, Z G-hGFPQk{k7i/wŲXS1-pT`h@ Eg?H=|ϋ+| ,ֈ33=a?3gQE-쨄mz'__xr ,ֈ SY.Q E-樾cK/u_G=(u&ŠF-ha4GvpeOџ{g~ʕ5󉕑5r7?u`{+yWŕ̡< 3O '*ZsgQ0]~=rp7җ;s"BʻfAKn\Mؠ6fDqj]UT`AZQ=sw>s};nW;zTGrw?%-9>[vyee"!יyʫ7+%-h@ 9ui/Ͼ./|G,5+nTew98$ .Oj+"lW E-樺+W߾to~YwS.XkD³~Q G0{ߐW~(7I:ij~V?ߒQk˪J0o8*o"FsT"?gՏ>''nx5Z^\zo@UO60rM'rK~|EI)m=zBV?r\ `h@ Eա3ߧ}n1 L-h"pT0^E-pT("pT8*hh@ 8*4  Z G-hGFQA@Z0QG?eQA#AZ0Qi@8*h6h@ :`:`ξ`Κ\=}8*0dn|C>)8H^\?J|W :} ZBiJњxپ8uT{R}^pʩUrݛSgf;#UU=m8*02W X)Qyf뭌xRyWqT`h@ c_G帢NwNy5U6^Vd;AZҏ%)FuTRהo}T 7՟E_QE-_ʬr 㟖:I?乫[|~^8*1jGQA@ZQᨠQE-pT("pT8*hh@ 8*4 7@3 }5/6L«r͵K{8*h@ }:_gοX<Ǻ9ohpmoݞNQE2%J2Iݭo\~b'{{nVv>7orS:s8*4Gu?~緟WL8]_- JX[:8M~ T9V;V?[S{>.վ _ l-h!QWΜ}_2wUǔ|'lSMO]«x'w`O~b2=E-97=~-w'ſbe\H,%^a *d4*J6ʯU8N"Չ^s/>^<-_+Qj:*U$j"+oW8cݞR:*osS_{ܙ DUؽ)Rs(8*(I(pIENDB`java-design-patterns-1.18.0/front-controller/etc/front-controller.ucls000066400000000000000000000203721322244523500261220ustar00rootroot00000000000000 java-design-patterns-1.18.0/front-controller/pom.xml000066400000000000000000000042251322244523500224620ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 front-controller org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.junit.jupiter junit-jupiter-params test org.mockito mockito-core test java-design-patterns-1.18.0/front-controller/src/000077500000000000000000000000001322244523500217315ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/main/000077500000000000000000000000001322244523500226555ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/main/java/000077500000000000000000000000001322244523500235765ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/main/java/com/000077500000000000000000000000001322244523500243545ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500262045ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/main/java/com/iluwatar/front/000077500000000000000000000000001322244523500273345ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/main/java/com/iluwatar/front/controller/000077500000000000000000000000001322244523500315175ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/main/java/com/iluwatar/front/controller/App.java000066400000000000000000000046351322244523500331120ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.front.controller; /** * * The Front Controller is a presentation tier pattern. Essentially it defines a controller that * handles all requests for a web site. *

* The Front Controller pattern consolidates request handling through a single handler object ( * {@link FrontController}). This object can carry out the common the behavior such as * authorization, request logging and routing requests to corresponding views. *

* Typically the requests are mapped to command objects ({@link Command}) which then display the * correct view ({@link View}). *

* In this example we have implemented two views: {@link ArcherView} and {@link CatapultView}. These * are displayed by sending correct request to the {@link FrontController} object. For example, the * {@link ArcherView} gets displayed when {@link FrontController} receives request "Archer". When * the request is unknown, we display the error view ({@link ErrorView}). * */ public class App { /** * Program entry point * * @param args * command line args */ public static void main(String[] args) { FrontController controller = new FrontController(); controller.handleRequest("Archer"); controller.handleRequest("Catapult"); controller.handleRequest("foobar"); } } ApplicationException.java000066400000000000000000000026041322244523500364270ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/main/java/com/iluwatar/front/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.front.controller; /** * * Custom exception type * */ public class ApplicationException extends RuntimeException { private static final long serialVersionUID = 1L; public ApplicationException(Throwable cause) { super(cause); } } ArcherCommand.java000066400000000000000000000025051322244523500350100ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/main/java/com/iluwatar/front/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.front.controller; /** * * Command for archers. * */ public class ArcherCommand implements Command { @Override public void process() { new ArcherView().display(); } } ArcherView.java000066400000000000000000000027221322244523500343450ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/main/java/com/iluwatar/front/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.front.controller; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * View for archers. * */ public class ArcherView implements View { private static final Logger LOGGER = LoggerFactory.getLogger(ArcherView.class); @Override public void display() { LOGGER.info("Displaying archers"); } } CatapultCommand.java000066400000000000000000000025131322244523500353600ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/main/java/com/iluwatar/front/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.front.controller; /** * * Command for catapults. * */ public class CatapultCommand implements Command { @Override public void process() { new CatapultView().display(); } } CatapultView.java000066400000000000000000000027301322244523500347150ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/main/java/com/iluwatar/front/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.front.controller; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * View for catapults. * */ public class CatapultView implements View { private static final Logger LOGGER = LoggerFactory.getLogger(CatapultView.class); @Override public void display() { LOGGER.info("Displaying catapults"); } } Command.java000066400000000000000000000024351322244523500336650ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/main/java/com/iluwatar/front/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.front.controller; /** * * Commands are the intermediary between requests and views. * */ public interface Command { void process(); } ErrorView.java000066400000000000000000000027051322244523500342330ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/main/java/com/iluwatar/front/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.front.controller; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * View for errors. * */ public class ErrorView implements View { private static final Logger LOGGER = LoggerFactory.getLogger(ErrorView.class); @Override public void display() { LOGGER.error("Error 500"); } } FrontController.java000066400000000000000000000036701322244523500354450ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/main/java/com/iluwatar/front/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.front.controller; /** * * FrontController is the handler class that takes in all the requests and renders the correct * response. * */ public class FrontController { public void handleRequest(String request) { Command command = getCommand(request); command.process(); } private Command getCommand(String request) { Class commandClass = getCommandClass(request); try { return (Command) commandClass.newInstance(); } catch (Exception e) { throw new ApplicationException(e); } } private static Class getCommandClass(String request) { Class result; try { result = Class.forName("com.iluwatar.front.controller." + request + "Command"); } catch (ClassNotFoundException e) { result = UnknownCommand.class; } return result; } } UnknownCommand.java000066400000000000000000000025471322244523500352510ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/main/java/com/iluwatar/front/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.front.controller; /** * * Default command in case the mapping is not successful. * */ public class UnknownCommand implements Command { @Override public void process() { new ErrorView().display(); } } java-design-patterns-1.18.0/front-controller/src/main/java/com/iluwatar/front/controller/View.java000066400000000000000000000024251322244523500332770ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.front.controller; /** * * Views are the representations rendered for the user. * */ public interface View { void display(); } java-design-patterns-1.18.0/front-controller/src/test/000077500000000000000000000000001322244523500227105ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/test/java/000077500000000000000000000000001322244523500236315ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/test/java/com/000077500000000000000000000000001322244523500244075ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500262375ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/test/java/com/iluwatar/front/000077500000000000000000000000001322244523500273675ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/test/java/com/iluwatar/front/controller/000077500000000000000000000000001322244523500315525ustar00rootroot00000000000000AppTest.java000066400000000000000000000025211322244523500337160ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/test/java/com/iluwatar/front/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.front.controller; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } ApplicationExceptionTest.java000066400000000000000000000030331322244523500373170ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/test/java/com/iluwatar/front/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.front.controller; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertSame; /** * Date: 12/13/15 - 1:35 PM * * @author Jeroen Meulemeester */ public class ApplicationExceptionTest { @Test public void testCause() throws Exception { final Exception cause = new Exception(); assertSame(cause, new ApplicationException(cause).getCause()); } }CommandTest.java000066400000000000000000000051641322244523500345620ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/test/java/com/iluwatar/front/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.front.controller; import com.iluwatar.front.controller.utils.InMemoryAppender; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.params.ParameterizedTest; import org.junit.jupiter.params.provider.MethodSource; import java.util.ArrayList; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Date: 12/13/15 - 1:39 PM * * @author Jeroen Meulemeester */ public class CommandTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(); } @AfterEach public void tearDown() { appender.stop(); } static List dataProvider() { final List parameters = new ArrayList<>(); parameters.add(new Object[]{"Archer", "Displaying archers"}); parameters.add(new Object[]{"Catapult", "Displaying catapults"}); parameters.add(new Object[]{"NonExistentCommand", "Error 500"}); return parameters; } /** * @param request The request that's been tested * @param displayMessage The expected display message */ @ParameterizedTest @MethodSource("dataProvider") public void testDisplay(String request, String displayMessage) { final FrontController frontController = new FrontController(); assertEquals(0, appender.getLogSize()); frontController.handleRequest(request); assertEquals(displayMessage, appender.getLastMessage()); assertEquals(1, appender.getLogSize()); } } FrontControllerTest.java000066400000000000000000000050731322244523500363370ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/test/java/com/iluwatar/front/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.front.controller; import com.iluwatar.front.controller.utils.InMemoryAppender; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.params.ParameterizedTest; import org.junit.jupiter.params.provider.MethodSource; import java.util.ArrayList; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Date: 12/13/15 - 1:39 PM * * @author Jeroen Meulemeester */ public class FrontControllerTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(); } @AfterEach public void tearDown() { appender.stop(); } static List dataProvider() { final List parameters = new ArrayList<>(); parameters.add(new Object[]{new ArcherCommand(), "Displaying archers"}); parameters.add(new Object[]{new CatapultCommand(), "Displaying catapults"}); parameters.add(new Object[]{new UnknownCommand(), "Error 500"}); return parameters; } /** * @param command The command that's been tested * @param displayMessage The expected display message */ @ParameterizedTest @MethodSource("dataProvider") public void testDisplay(Command command, String displayMessage) { assertEquals(0, appender.getLogSize()); command.process(); assertEquals(displayMessage, appender.getLastMessage()); assertEquals(1, appender.getLogSize()); } } ViewTest.java000066400000000000000000000050311322244523500341070ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/test/java/com/iluwatar/front/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.front.controller; import com.iluwatar.front.controller.utils.InMemoryAppender; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.params.ParameterizedTest; import org.junit.jupiter.params.provider.MethodSource; import java.util.ArrayList; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Date: 12/13/15 - 1:39 PM * * @author Jeroen Meulemeester */ public class ViewTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(); } @AfterEach public void tearDown() { appender.stop(); } static List dataProvider() { final List parameters = new ArrayList<>(); parameters.add(new Object[]{new ArcherView(), "Displaying archers"}); parameters.add(new Object[]{new CatapultView(), "Displaying catapults"}); parameters.add(new Object[]{new ErrorView(), "Error 500"}); return parameters; } /** * @param view The view that's been tested * @param displayMessage The expected display message */ @ParameterizedTest @MethodSource("dataProvider") public void testDisplay(View view, String displayMessage) { assertEquals(0, appender.getLogSize()); view.display(); assertEquals(displayMessage, appender.getLastMessage()); assertEquals(1, appender.getLogSize()); } } java-design-patterns-1.18.0/front-controller/src/test/java/com/iluwatar/front/controller/utils/000077500000000000000000000000001322244523500327125ustar00rootroot00000000000000InMemoryAppender.java000066400000000000000000000036171322244523500367230ustar00rootroot00000000000000java-design-patterns-1.18.0/front-controller/src/test/java/com/iluwatar/front/controller/utils/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.front.controller.utils; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import org.slf4j.LoggerFactory; import java.util.LinkedList; import java.util.List; /** * InMemory Log Appender Util. */ public class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender() { ((Logger) LoggerFactory.getLogger("root")).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public String getLastMessage() { return log.get(log.size() - 1).getFormattedMessage(); } public int getLogSize() { return log.size(); } } java-design-patterns-1.18.0/guarded-suspension/000077500000000000000000000000001322244523500214505ustar00rootroot00000000000000java-design-patterns-1.18.0/guarded-suspension/README.md000066400000000000000000000010541322244523500227270ustar00rootroot00000000000000--- layout: pattern title: Guarded Suspension folder: guarded-suspension permalink: /patterns/guarded-suspension/ categories: Concurrency tags: - Java - Difficulty-Beginner --- ## Intent Use Guarded suspension pattern to handle a situation when you want to execute a method on object which is not in a proper state. ![Guarded Suspension diagram](./etc/guarded-suspension.png) ## Applicability Use Guarded Suspension pattern when the developer knows that the method execution will be blocked for a finite period of time ## Related patterns * Balking java-design-patterns-1.18.0/guarded-suspension/etc/000077500000000000000000000000001322244523500222235ustar00rootroot00000000000000java-design-patterns-1.18.0/guarded-suspension/etc/guarded-suspension.png000066400000000000000000000241161322244523500265540ustar00rootroot00000000000000PNG  IHDRB(IDATxXSWe9jZ lD-(*  S $ת:@ ߽ #ɽ@ ''s~{r{@1c+1}!~bo2hH5 "*0 `, "*0ilbLxlI$r@i!ZʳT-#ϟ5vU,Qp/;:BEW0M~Sɕ#0J}E}E^a#n x?n>kb z`)(srN}MAOai }ڼ]Oh g[,\Z˞̴9NmbsE|rz;MSk}SCmԼv2/[BjZzA/g9A5q]AF csDOUoQ^I&#O 47bQՁ<3Ma4{Do"By:N%E!R%4{O06d^ 5oC^1;Ƹ VSMAi0ZGA~B'g/oci*pD܋#&<} v;i6:**zDr^KExb)􊡵&1mGu4vI(l"SpmMEMmx(sy_zlឧc=^ґpc@&GMiv*Q7iyz6JlUQ'VῩWXzA{׶] ADJˬ8;KC[ԣQcc+}z|K R$-fc>ZSVA3{Scn h3 .)M5&m!f]q<{ 2qતh0o<>hc U1=tu+g%AJk ݢvaGۂdU6`XoES{+M;WS&O`;L jbt$ 5GNEYNaoe1gšoՌ-Mu$f6vcO!d֚#S11a 4z ܚcX0QIcX0QI]^RGDDv9a0+NRp " AchlO(t|ݓZS,7xr5n%찷T6pͽ[MRMVKIn?ERNr.էN l p|oa7,;TT|g{wAҽ7o͕1]}cW ]5Kĥ/2a{Əlk؞Bb(O6JqaxDA>`( \.'Xg"V筁{4Cό{n8^34l˛ׯ!]mE%:J+nk\= ).PwWI!b[aſXmViRbt8,>y[I&~f 2ɦ&Mtι; 69J%V5'{"eGkHZٙLq5#IδIÝ0F\B+>q800z[%F7uB^&8':Zu3Lpg/Q]Jnω S^qVZWͻ%isL$%5oXL_84L+W+Jp>I/J M =G˙`xO:f*dPKơa =CrHK}wŋ9^_W3:bQ*$7y%eˠɻ-E{ =oy5o%nSs{dC# t8SKz"J$$ƫw5:Ξ$5~XRim_wJIȭ9$? 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-c⥾^ ,O+|uPh><cb2e{=9Xh.+p6# ` [زC.9.)Xa"eAIh>ʹ^g9]9k/=SM)AL6#"(W?`<"Tˎ6L,lbz<4}6#(W?`;m']ua~1Fh0c^Ձٟ@0iYFUs-; 31  @TcS'u󱫁G{g%MS!q^nyhuh S{ BA|j F/ADAa򥴅 ?ܨ?  kpS~zƚvwѰjDOca p3 `,0!5"$X0cXX`,B kEHca jxaAF@Z-ߝRa2.9(^`,o}z Gcq=5.ofQp;|WKCf,9yGFs?Z(u[,\ZKF,ԴZ.TH׭-YZ&g/p'i1A @]FfEئF9}:0>UCFuc4@s1hMy^գyy*/-HIE3OE8I*:`GcY3c} un[Jhs3 java-design-patterns-1.18.0/guarded-suspension/pom.xml000066400000000000000000000037351322244523500227750ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 jar guarded-suspension org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/guarded-suspension/src/000077500000000000000000000000001322244523500222375ustar00rootroot00000000000000java-design-patterns-1.18.0/guarded-suspension/src/main/000077500000000000000000000000001322244523500231635ustar00rootroot00000000000000java-design-patterns-1.18.0/guarded-suspension/src/main/java/000077500000000000000000000000001322244523500241045ustar00rootroot00000000000000java-design-patterns-1.18.0/guarded-suspension/src/main/java/com/000077500000000000000000000000001322244523500246625ustar00rootroot00000000000000java-design-patterns-1.18.0/guarded-suspension/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500265125ustar00rootroot00000000000000java-design-patterns-1.18.0/guarded-suspension/src/main/java/com/iluwatar/guarded/000077500000000000000000000000001322244523500301255ustar00rootroot00000000000000java-design-patterns-1.18.0/guarded-suspension/src/main/java/com/iluwatar/guarded/suspension/000077500000000000000000000000001322244523500323335ustar00rootroot00000000000000App.java000066400000000000000000000054741322244523500336510ustar00rootroot00000000000000java-design-patterns-1.18.0/guarded-suspension/src/main/java/com/iluwatar/guarded/suspension/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ /** * Guarded-suspension is a concurrent design pattern for handling situation when to execute some action we need * condition to be satisfied. *

* Implementation is based on GuardedQueue, which has two methods: get and put, * the condition is that we cannot get from empty queue so when thread attempt * to break the condition we invoke Object's wait method on him and when other thread put an element * to the queue he notify the waiting one that now he can get from queue. */ package com.iluwatar.guarded.suspension; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; /** * Created by robertt240 on 1/26/17. */ public class App { /** * Example pattern execution * * @param args - command line args */ public static void main(String[] args) { GuardedQueue guardedQueue = new GuardedQueue(); ExecutorService executorService = Executors.newFixedThreadPool(3); //here we create first thread which is supposed to get from guardedQueue executorService.execute(() -> { guardedQueue.get(); } ); //here we wait two seconds to show that the thread which is trying to get from guardedQueue will be waiting try { Thread.sleep(2000); } catch (InterruptedException e) { e.printStackTrace(); } //now we execute second thread which will put number to guardedQueue and notify first thread that it could get executorService.execute(() -> { guardedQueue.put(20); } ); executorService.shutdown(); try { executorService.awaitTermination(30, TimeUnit.SECONDS); } catch (InterruptedException e) { e.printStackTrace(); } } } GuardedQueue.java000066400000000000000000000045221322244523500355020ustar00rootroot00000000000000java-design-patterns-1.18.0/guarded-suspension/src/main/java/com/iluwatar/guarded/suspension/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.guarded.suspension; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.LinkedList; import java.util.Queue; /** * Guarded Queue is an implementation for Guarded Suspension Pattern * Guarded suspension pattern is used to handle a situation when you want to execute a method * on an object which is not in a proper state. * @see http://java-design-patterns.com/patterns/guarded-suspension/ */ public class GuardedQueue { private static final Logger LOGGER = LoggerFactory.getLogger(GuardedQueue.class); private final Queue sourceList; public GuardedQueue() { this.sourceList = new LinkedList<>(); } /** * @return last element of a queue if queue is not empty */ public synchronized Integer get() { while (sourceList.isEmpty()) { try { LOGGER.info("waiting"); wait(); } catch (InterruptedException e) { e.printStackTrace(); } } LOGGER.info("getting"); return sourceList.peek(); } /** * @param e number which we want to put to our queue */ public synchronized void put(Integer e) { LOGGER.info("putting"); sourceList.add(e); LOGGER.info("notifying"); notify(); } } java-design-patterns-1.18.0/guarded-suspension/src/test/000077500000000000000000000000001322244523500232165ustar00rootroot00000000000000java-design-patterns-1.18.0/guarded-suspension/src/test/java/000077500000000000000000000000001322244523500241375ustar00rootroot00000000000000java-design-patterns-1.18.0/guarded-suspension/src/test/java/com/000077500000000000000000000000001322244523500247155ustar00rootroot00000000000000java-design-patterns-1.18.0/guarded-suspension/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500265455ustar00rootroot00000000000000java-design-patterns-1.18.0/guarded-suspension/src/test/java/com/iluwatar/guarded/000077500000000000000000000000001322244523500301605ustar00rootroot00000000000000java-design-patterns-1.18.0/guarded-suspension/src/test/java/com/iluwatar/guarded/suspension/000077500000000000000000000000001322244523500323665ustar00rootroot00000000000000GuardedQueueTest.java000066400000000000000000000041431322244523500363740ustar00rootroot00000000000000java-design-patterns-1.18.0/guarded-suspension/src/test/java/com/iluwatar/guarded/suspension/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.guarded.suspension; import org.junit.jupiter.api.Test; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Test for Guarded Queue */ public class GuardedQueueTest { private volatile Integer value; @Test public void testGet() { GuardedQueue g = new GuardedQueue(); ExecutorService executorService = Executors.newFixedThreadPool(2); executorService.submit(() -> value = g.get()); executorService.submit(() -> g.put(Integer.valueOf(10))); executorService.shutdown(); try { executorService.awaitTermination(30, TimeUnit.SECONDS); } catch (InterruptedException e) { e.printStackTrace(); } assertEquals(Integer.valueOf(10), value); } @Test public void testPut() { GuardedQueue g = new GuardedQueue(); g.put(12); assertEquals(Integer.valueOf(12), g.get()); } } java-design-patterns-1.18.0/half-sync-half-async/000077500000000000000000000000001322244523500215405ustar00rootroot00000000000000java-design-patterns-1.18.0/half-sync-half-async/README.md000066400000000000000000000031341322244523500230200ustar00rootroot00000000000000--- layout: pattern title: Half-Sync/Half-Async folder: half-sync-half-async permalink: /patterns/half-sync-half-async/ categories: Concurrency tags: - Java - Difficulty-Intermediate --- ## Intent The Half-Sync/Half-Async pattern decouples synchronous I/O from asynchronous I/O in a system to simplify concurrent programming effort without degrading execution efficiency. ![Half-Sync/Half-Async class diagram](./etc/half-sync-half-async.png) ## Applicability Use Half-Sync/Half-Async pattern when * a system possesses following characteristics: * the system must perform tasks in response to external events that occur asynchronously, like hardware interrupts in OS * it is inefficient to dedicate separate thread of control to perform synchronous I/O for each external source of event * the higher level tasks in the system can be simplified significantly if I/O is performed synchronously. * one or more tasks in a system must run in a single thread of control, while other tasks may benefit from multi-threading. ## Real world examples * [BSD Unix networking subsystem](http://www.cs.wustl.edu/~schmidt/PDF/PLoP-95.pdf) * [Real Time CORBA](http://www.omg.org/news/meetings/workshops/presentations/realtime2001/4-3_Pyarali_thread-pool.pdf) * [Android AsyncTask framework](http://developer.android.com/reference/android/os/AsyncTask.html) ## Credits * [Douglas C. Schmidt and Charles D. Cranor - Half Sync/Half Async](http://www.cs.wustl.edu/~schmidt/PDF/PLoP-95.pdf) * [Pattern Oriented Software Architecture Vol I-V](http://www.amazon.com/Pattern-Oriented-Software-Architecture-Volume-Patterns/dp/0471958697) java-design-patterns-1.18.0/half-sync-half-async/etc/000077500000000000000000000000001322244523500223135ustar00rootroot00000000000000java-design-patterns-1.18.0/half-sync-half-async/etc/half-sync-half-async.png000066400000000000000000001001421322244523500267260ustar00rootroot00000000000000PNG  IHDR-q)IDATx \Mǐma6b,YCV)bDeMR([;*5Pc[Bd-fa&[ޙ3wι uO~=yws:R o=Z < @a@--*Tˏ:@ͧ-N!*0T%0x8a0KKÖ-9<{vnݷ+ڻs4ba߯_ox|@ߗ/ { 1K޽Af?>JH NNV/_R ),#>.tVey㉜O !dÄx.Y2;J)^ϕ+<ȗY@u!>} WWkooaE|llB`AU5`+gqq&M2Ĉ2þzm>JGӧ'L"E(Ä䬐Ht~-P4Œfox9ϭ`7lj._ޭۣkNNV5Wfa6yOt)L5zAT.]ڱMH|}ɐdz^@=˄< x<ǵ@U@a0< q 0xġ2e5>fQjD"xM$Z|E#xFOnM,J *S Ts:wЦ~}59s+jowRaa}ݻ6=:Ұa}$xA];֝>ۯei/pԚa/1[[:uXYȷ֮z\:d%~߾h\j֭@5Υذ 2^{%&jBŋ^Hdg'))ɥ :uj۸qCSӾ"(m1N 1z _޽56odսҮ{MW[n[mkw$[7R͘pxsKgs vmNrX [C\vvzr,vHIkժaTB⥦Vڸ(on!N%m"$ēd an׮KJ ޒ!+(X "a|QjJ2=LNZH'kmܕ;$0p"(AjjILZ~"73ܹC9Txu,nO?'{k:p ?x[{swۭ6Fnbۿ2PxoO^ןL^23}ՐRsz\I2Şyap$&PjXdT35J è5]G6S˗3f80[Zwi޼z-ٳr>2#;@ǹ?,iöLʌZxX:A{yXxjhׯGmȫnW5pvo_;4=Lf_oΆ4OzGv%IJ:RY ~ɪm0EaTLO KKÖ-9a;%%nn?Eon3Bsm0Ea=ztef Ӷm{^ΞO < `}:U6nȘ7EW`aMq 4KpL2Pre/u{k.{=L253ӵ74앖$SӾCޅ590Ea}G"ٳg){R a$Cj'OEEyG}զ \ ͟8qpÄ._Zs'gӦ@&;-'gEE50EaV]&Fzyسg'61iҤ?d5oK|la G[f&<]IK")mr߻`mm,! x@?gf^6t)5a:wxQIEt5ׯcoE de!tІiQKvijvu+KfSсjYC3y'7e&$ur{vQQ*¦mVYRPɁ)~:B%Z{{;k,gSd˖ .fg/oԨ[95i!FT{OVZZݻÄܹE9۷mnL=fdpTxQҢX?4r@6q#Ȩϭ[YwO?v|:bh& yXII><ȧkhɓ ''$KsСFkyɼ(&bg\ѣ#cOָ5^9_#\[WG׮흜>=qZX臅M>*Jy3SMPYfvwѪU.]Y[_ϟֿDC[6eVPPa*a4i g/_nS67ܱ<=gN2=,"b:嗖/hի&ySڳfKuDɤ\@{Wѣkh L@ x@ݸi0xӯ2;^WiFIRvr*k9-]:6W.^Ö,ZZa5z8ɓx0 S={[?0pbdFhaTet'!(33fΜxXt7[KKM<{vsLUɓe yKu%snݺ{_kX< 0 SȈ8P{T{Ҭ}[C[~uooAZssu2*;.__˗w!%%Rî\Ò5lhsܿx6vvW̉HaԚCN70x!/aFԿ~}Ew< !aFn}}u;\C@0 _@u~w4iJgWM0oWZ~? ׈g K?|r^>_7t3tݺ}ԣGjK$;~PF ?lޚ5}ԦaA޿x%t ;QN4(9q893v.\~8:\Wrmib;1_ $%%Nܹ\}TWev j𔅅~Ӧ>=QZ>әL"#7n8rG?DG;4g6oСFT2၁;wVgv:~}m[,[6ŠfR y.k6ܹUAFF};xN[jGyX-Sx2UƀT%Ui:Pz`z†Mt Wo}a|&'OpLtC44܆f͚r&?<) 124UZ$(-Rp:u~1Tپ}kiFQsrVaҮ]+*'&[~4d֭,R?z`hڵiS.df0BE go_{yɐY[%m = ri^NKk8y2UƀT%Ui:Pz h{l= Ђ !C ‡DXsd`_go/.M"ʊ{ U޽۠Asz\rM* /_MZZ] 4K}4f,]_TOɓ킃={ $*)ɜf;9]2+.)\X=qзr%o_/KH{Aŋ;V~}L֕-&Q/԰aCd(3ɲ/&|oKVV5;R밉o/R,=:" -)uZ e6+okD55%Ui:Pz;}\OָK |{t~Ktʱ{/( إ͛lm 7ݽ[Zn<·`J+73~z0͛Vn~&5;{Ik2}*ss 1b&\ԩC'thoyx"9%1ر  Džv6iѢL{y25PatW@="d_BKOǸnp_hD0eΝ[vQ…\ vV)S34߫WgWXSβe3ئLIrVV\>7$!(S85z-WӅ0"26ln"΅MOgӦ^K˦M޽55j@k(0EaTj3Ƃ}?r o3v۶P^{$Gm?x!/aF> f;wr׮<\m7ѧL0B^*8Z\ 3a,G]E?}zb8+ss}Moi{]V Ir%K?nݷp^^Vٓ&_,Yʕ=O aT9S~.fg[PG%dfX[SGxFFbbmi 9<ȿ{7~'ۍ9#996lf3sΜKjeM;礧דԺt\]L nȘ0avx^=kg'X`-/>u=e~yusN#k[7?:ڛZvp3:Ԉ+u&kP0M)M\"C"B"B`ƕ*yiΆh~LO_v-,&O ͳ۷o-}>\ݧς!W*%bIưz\$Wpt$v`:kSAxŋ;<(y ;_;77r(3>~vFF [S&rĉ#d;yŋ,_d|Hbb[#xJITa*|װk"BQ6%KFF5Bo߫Wg ӁyشirrVppZRAAeo&I۝\۽{ )ՏmNC7ndxzڐ l@pƫ~/s_M#%LMΘil{{)RGoү*< ȟgGVP9Ja^CUhT :{vsLUɓk'LJĒȺ,HY=;h9b5{;Kl4?33fΜz<% JnnýF!lwo+A< ¨ԯӁyݻFmncc;Nrފ<ʕ=72yT{__G;p6[!6Xd*ddP%%ۭ`mRR"y(/ ObxqqhO5biٕ;eV͟>=!lwo-ݯU0 SROa!K;¿T~ x@/tSXw%%_Pa0>y0EaTLO0B^*[U~ȧ:P%%%o/}=E0B^@ҿIIIbDyZQ0B^@4k֬cǎEEEbځ!$??=j@ x(rX*7kLT;0B^@H_UxOO88^ݻwbÆU2;W&m׮;xQG(2a0øM0R1ǣa/_ TKJr%<ioe6#ksE< Fll,0vϾHQUa7ndZXJK עm<gkkjl̙dvƍcXPy,Gڥo_'Oխt2=lٲT_mbҗ#ϸqVԴoQQ2 y3f8P͜9ɨ>0p",nlѢ٭[YT# x( mm|Ҳ`*aHoLٴ)0++nlUcZ#TŒj Hff1Ucȑ-Q]WSyI:vx = IZZR/^_:^,(BB<ѣXu"RA++xu2!O]Kv6iiQdBd;PhiuIJZD:2||ZZT7%>~6ӑӹ-$?K緵lٌGf;xXhŋ]~~N+WI۷wwqNޠG(2a\]]E2U<zXiuQçyH%znȨϥK45;ݺt$$sɒ\aTtë44ԽFl#aZ< v:9Iݻ\;KNsE< mjj"?S ^y=8ܹDjҾ}k2!Ot$.n֤ICAE:B"y߲HV-ЮkҤ;aW;~}uIʤ )-TڻGy:$[ɓHH><ҥK;ʜ;יNĤ/t;(/ꂴO3pT'.P"HTZ4?? 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.halfsynchalfasync; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.concurrent.LinkedBlockingQueue; /** * * This application demonstrates Half-Sync/Half-Async pattern. Key parts of the pattern are * {@link AsyncTask} and {@link AsynchronousService}. * *

* PROBLEM
* A concurrent system have a mixture of short duration, mid duration and long duration tasks. Mid * or long duration tasks should be performed asynchronously to meet quality of service * requirements. * *

* INTENT
* The intent of this pattern is to separate the the synchronous and asynchronous processing in the * concurrent application by introducing two intercommunicating layers - one for sync and one for * async. This simplifies the programming without unduly affecting the performance. * *

* APPLICABILITY
* UNIX network subsystems - In operating systems network operations are carried out * asynchronously with help of hardware level interrupts.
* CORBA - At the asynchronous layer one thread is associated with each socket that is connected * to the client. Thread blocks waiting for CORBA requests from the client. On receiving request it * is inserted in the queuing layer which is then picked up by synchronous layer which processes the * request and sends response back to the client.
* Android AsyncTask framework - Framework provides a way to execute long running blocking * calls, such as downloading a file, in background threads so that the UI thread remains free to * respond to user inputs.
* *

* IMPLEMENTATION
* The main method creates an asynchronous service which does not block the main thread while the * task is being performed. The main thread continues its work which is similar to Async Method * Invocation pattern. The difference between them is that there is a queuing layer between * Asynchronous layer and synchronous layer, which allows for different communication patterns * between both layers. Such as Priority Queue can be used as queuing layer to prioritize the way * tasks are executed. Our implementation is just one simple way of implementing this pattern, there * are many variants possible as described in its applications. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args command line args */ public static void main(String[] args) { AsynchronousService service = new AsynchronousService(new LinkedBlockingQueue<>()); /* * A new task to calculate sum is received but as this is main thread, it should not block. So * it passes it to the asynchronous task layer to compute and proceeds with handling other * incoming requests. This is particularly useful when main thread is waiting on Socket to * receive new incoming requests and does not wait for particular request to be completed before * responding to new request. */ service.execute(new ArithmeticSumTask(1000)); /* * New task received, lets pass that to async layer for computation. So both requests will be * executed in parallel. */ service.execute(new ArithmeticSumTask(500)); service.execute(new ArithmeticSumTask(2000)); service.execute(new ArithmeticSumTask(1)); } /** * * ArithmeticSumTask * */ static class ArithmeticSumTask implements AsyncTask { private long n; public ArithmeticSumTask(long n) { this.n = n; } /* * This is the long running task that is performed in background. In our example the long * running task is calculating arithmetic sum with artificial delay. */ @Override public Long call() throws Exception { return ap(n); } /* * This will be called in context of the main thread where some validations can be done * regarding the inputs. Such as it must be greater than 0. It's a small computation which can * be performed in main thread. If we did validated the input in background thread then we pay * the cost of context switching which is much more than validating it in main thread. */ @Override public void onPreCall() { if (n < 0) { throw new IllegalArgumentException("n is less than 0"); } } @Override public void onPostCall(Long result) { // Handle the result of computation LOGGER.info(result.toString()); } @Override public void onError(Throwable throwable) { throw new IllegalStateException("Should not occur"); } } private static long ap(long i) { try { Thread.sleep(i); } catch (InterruptedException e) { LOGGER.error("Exception caught.", e); } return i * (i + 1) / 2; } } AsyncTask.java000066400000000000000000000053351322244523500347740ustar00rootroot00000000000000java-design-patterns-1.18.0/half-sync-half-async/src/main/java/com/iluwatar/halfsynchalfasync/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.halfsynchalfasync; import java.util.concurrent.Callable; /** * Represents some computation that is performed asynchronously and its result. The computation is * typically done is background threads and the result is posted back in form of callback. The * callback does not implement {@code isComplete}, {@code cancel} as it is out of scope of this * pattern. * * @param type of result */ public interface AsyncTask extends Callable { /** * Is called in context of caller thread before call to {@link #call()}. Large tasks should not be * performed in this method as it will block the caller thread. Small tasks such as validations * can be performed here so that the performance penalty of context switching is not incurred in * case of invalid requests. */ void onPreCall(); /** * A callback called after the result is successfully computed by {@link #call()}. In our * implementation this method is called in context of background thread but in some variants, such * as Android where only UI thread can change the state of UI widgets, this method is called in * context of UI thread. */ void onPostCall(O result); /** * A callback called if computing the task resulted in some exception. This method is called when * either of {@link #call()} or {@link #onPreCall()} throw any exception. * * @param throwable error cause */ void onError(Throwable throwable); /** * This is where the computation of task should reside. This method is called in context of * background thread. */ @Override O call() throws Exception; } AsynchronousService.java000066400000000000000000000101751322244523500371060ustar00rootroot00000000000000java-design-patterns-1.18.0/half-sync-half-async/src/main/java/com/iluwatar/halfsynchalfasync/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.halfsynchalfasync; import java.util.concurrent.BlockingQueue; import java.util.concurrent.ExecutionException; import java.util.concurrent.ExecutorService; import java.util.concurrent.FutureTask; import java.util.concurrent.ThreadPoolExecutor; import java.util.concurrent.TimeUnit; /** * This is the asynchronous layer which does not block when a new request arrives. It just passes * the request to the synchronous layer which consists of a queue i.e. a {@link BlockingQueue} and a * pool of threads i.e. {@link ThreadPoolExecutor}. Out of this pool of worker threads one of the * thread picks up the task and executes it synchronously in background and the result is posted * back to the caller via callback. */ public class AsynchronousService { /* * This represents the queuing layer as well as synchronous layer of the pattern. The thread pool * contains worker threads which execute the tasks in blocking/synchronous manner. Long running * tasks should be performed in the background which does not affect the performance of main * thread. */ private ExecutorService service; /** * Creates an asynchronous service using {@code workQueue} as communication channel between * asynchronous layer and synchronous layer. Different types of queues such as Priority queue, can * be used to control the pattern of communication between the layers. */ public AsynchronousService(BlockingQueue workQueue) { service = new ThreadPoolExecutor(10, 10, 10, TimeUnit.SECONDS, workQueue); } /** * A non-blocking method which performs the task provided in background and returns immediately. *

* On successful completion of task the result is posted back using callback method * {@link AsyncTask#onPostCall(Object)}, if task execution is unable to complete normally due to * some exception then the reason for error is posted back using callback method * {@link AsyncTask#onError(Throwable)}. *

* NOTE: The results are posted back in the context of background thread in this implementation. */ public void execute(final AsyncTask task) { try { // some small tasks such as validation can be performed here. task.onPreCall(); } catch (Exception e) { task.onError(e); return; } service.submit(new FutureTask(task) { @Override protected void done() { super.done(); try { /* * called in context of background thread. There is other variant possible where result is * posted back and sits in the queue of caller thread which then picks it up for * processing. An example of such a system is Android OS, where the UI elements can only * be updated using UI thread. So result must be posted back in UI thread. */ task.onPostCall(get()); } catch (InterruptedException e) { // should not occur } catch (ExecutionException e) { task.onError(e.getCause()); } } }); } } java-design-patterns-1.18.0/half-sync-half-async/src/test/000077500000000000000000000000001322244523500233065ustar00rootroot00000000000000java-design-patterns-1.18.0/half-sync-half-async/src/test/java/000077500000000000000000000000001322244523500242275ustar00rootroot00000000000000java-design-patterns-1.18.0/half-sync-half-async/src/test/java/com/000077500000000000000000000000001322244523500250055ustar00rootroot00000000000000java-design-patterns-1.18.0/half-sync-half-async/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500266355ustar00rootroot00000000000000java-design-patterns-1.18.0/half-sync-half-async/src/test/java/com/iluwatar/halfsynchalfasync/000077500000000000000000000000001322244523500323355ustar00rootroot00000000000000AppTest.java000066400000000000000000000026331322244523500345050ustar00rootroot00000000000000java-design-patterns-1.18.0/half-sync-half-async/src/test/java/com/iluwatar/halfsynchalfasync/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.halfsynchalfasync; import org.junit.jupiter.api.Test; import java.util.concurrent.ExecutionException; /** * * Application test * */ public class AppTest { @Test public void test() throws InterruptedException, ExecutionException { App.main(null); } } AsynchronousServiceTest.java000066400000000000000000000071451322244523500400040ustar00rootroot00000000000000java-design-patterns-1.18.0/half-sync-half-async/src/test/java/com/iluwatar/halfsynchalfasync/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.halfsynchalfasync; import org.junit.jupiter.api.Test; import org.mockito.InOrder; import java.io.IOException; import java.util.concurrent.LinkedBlockingQueue; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.doThrow; import static org.mockito.Mockito.inOrder; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.timeout; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.when; /** * Date: 12/12/15 - 11:15 PM * * @author Jeroen Meulemeester */ public class AsynchronousServiceTest { @Test public void testPerfectExecution() throws Exception { final AsynchronousService service = new AsynchronousService(new LinkedBlockingQueue<>()); final AsyncTask task = mock(AsyncTask.class); final Object result = new Object(); when(task.call()).thenReturn(result); service.execute(task); verify(task, timeout(2000)).onPostCall(eq(result)); final InOrder inOrder = inOrder(task); inOrder.verify(task, times(1)).onPreCall(); inOrder.verify(task, times(1)).call(); inOrder.verify(task, times(1)).onPostCall(eq(result)); verifyNoMoreInteractions(task); } @Test public void testCallException() throws Exception { final AsynchronousService service = new AsynchronousService(new LinkedBlockingQueue<>()); final AsyncTask task = mock(AsyncTask.class); final IOException exception = new IOException(); when(task.call()).thenThrow(exception); service.execute(task); verify(task, timeout(2000)).onError(eq(exception)); final InOrder inOrder = inOrder(task); inOrder.verify(task, times(1)).onPreCall(); inOrder.verify(task, times(1)).call(); inOrder.verify(task, times(1)).onError(exception); verifyNoMoreInteractions(task); } @Test public void testPreCallException() throws Exception { final AsynchronousService service = new AsynchronousService(new LinkedBlockingQueue<>()); final AsyncTask task = mock(AsyncTask.class); final IllegalStateException exception = new IllegalStateException(); doThrow(exception).when(task).onPreCall(); service.execute(task); verify(task, timeout(2000)).onError(eq(exception)); final InOrder inOrder = inOrder(task); inOrder.verify(task, times(1)).onPreCall(); inOrder.verify(task, times(1)).onError(exception); verifyNoMoreInteractions(task); } }java-design-patterns-1.18.0/hexagonal/000077500000000000000000000000001322244523500175775ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/README.md000066400000000000000000000024131322244523500210560ustar00rootroot00000000000000--- layout: pattern title: Hexagonal Architecture folder: hexagonal permalink: /patterns/hexagonal/ pumlformat: svg categories: Architectural tags: - Java - Difficulty-Expert --- ## Also known as * Ports and Adapters * Clean Architecture * Onion Architecture ## Intent Allow an application to equally be driven by users, programs, automated test or batch scripts, and to be developed and tested in isolation from its eventual run-time devices and databases. ![Hexagonal Architecture class diagram](./etc/hexagonal.png) ## Applicability Use Hexagonal Architecture pattern when * When the application needs to be independent of any frameworks * When it is important that the application highly maintainable and fully testable ## Tutorials * [Build Maintainable Systems With Hexagonal Architecture](http://java-design-patterns.com/blog/build-maintainable-systems-with-hexagonal-architecture/) ## Presentations * [Hexagonal Architecture](https://github.com/iluwatar/java-design-patterns/tree/master/hexagonal/etc/presentation.html) ## Real world examples * [Apache Isis](https://isis.apache.org/) builds generic UI and REST API directly from the underlying domain objects ## Credits * [Alistair Cockburn - Hexagonal Architecture](http://alistair.cockburn.us/Hexagonal+architecture) java-design-patterns-1.18.0/hexagonal/etc/000077500000000000000000000000001322244523500203525ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/etc/hexagonal.png000066400000000000000000004421721322244523500230400ustar00rootroot00000000000000PNG  IHDR hbCDAIDATx xE]@wQ@p $#@M g@"rM A9>u?TUq=AP]՝t{~Ozz߮c AAAAAAAt        ȓ9AAAAAAA9IY0 2Upd)$!L,AS~ 6 AeMoo`G<p `)``*pg9]a)/HꀏSR$Tf΂s`$bS`_&7 I dw!H"Ħ >LLnKS8 ! 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal; import com.google.inject.Guice; import com.google.inject.Injector; import com.iluwatar.hexagonal.domain.LotteryAdministration; import com.iluwatar.hexagonal.domain.LotteryService; import com.iluwatar.hexagonal.module.LotteryTestingModule; import com.iluwatar.hexagonal.sampledata.SampleData; /** * * Hexagonal Architecture pattern decouples the application core from the * services it uses. This allows the services to be plugged in and the * application will run with or without the services.

* * The core logic, or business logic, of an application consists of the * algorithms that are essential to its purpose. They implement the use * cases that are the heart of the application. When you change them, you * change the essence of the application.

* * The services are not essential. They can be replaced without changing * the purpose of the application. Examples: database access and other * types of storage, user interface components, e-mail and other * communication components, hardware devices.

* * This example demonstrates Hexagonal Architecture with a lottery system. * The application core is separate from the services that drive it and * from the services it uses.

* * The primary ports for the application are console interfaces * {@link ConsoleAdministration} through which the lottery round is * initiated and run and {@link ConsoleLottery} that allows players to * submit lottery tickets for the draw.

* * The secondary ports that application core uses are {@link WireTransfers} * which is a banking service, {@link LotteryEventLog} that delivers * eventlog as lottery events occur and {@link LotteryTicketRepository} * that is the storage for the lottery tickets. * */ public class App { /** * Program entry point */ public static void main(String[] args) { Injector injector = Guice.createInjector(new LotteryTestingModule()); // start new lottery round LotteryAdministration administartion = injector.getInstance(LotteryAdministration.class); administartion.resetLottery(); // submit some lottery tickets LotteryService service = injector.getInstance(LotteryService.class); SampleData.submitTickets(service, 20); // perform lottery administartion.performLottery(); } } java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/administration/000077500000000000000000000000001322244523500316345ustar00rootroot00000000000000ConsoleAdministration.java000066400000000000000000000067571322244523500367470ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/administration/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.administration; import com.google.inject.Guice; import com.google.inject.Injector; import com.iluwatar.hexagonal.domain.LotteryAdministration; import com.iluwatar.hexagonal.domain.LotteryNumbers; import com.iluwatar.hexagonal.domain.LotteryService; import com.iluwatar.hexagonal.module.LotteryModule; import com.iluwatar.hexagonal.mongo.MongoConnectionPropertiesLoader; import com.iluwatar.hexagonal.sampledata.SampleData; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.Scanner; /** * Console interface for lottery administration */ public class ConsoleAdministration { private static final Logger LOGGER = LoggerFactory.getLogger(ConsoleAdministration.class); /** * Program entry point */ public static void main(String[] args) { MongoConnectionPropertiesLoader.load(); Injector injector = Guice.createInjector(new LotteryModule()); LotteryAdministration administartion = injector.getInstance(LotteryAdministration.class); LotteryService service = injector.getInstance(LotteryService.class); SampleData.submitTickets(service, 20); try (Scanner scanner = new Scanner(System.in)) { boolean exit = false; while (!exit) { printMainMenu(); String cmd = readString(scanner); if ("1".equals(cmd)) { administartion.getAllSubmittedTickets().forEach((k, v) -> LOGGER.info("Key: {}, Value: {}", k, v)); } else if ("2".equals(cmd)) { LotteryNumbers numbers = administartion.performLottery(); LOGGER.info("The winning numbers: {}", numbers.getNumbersAsString()); LOGGER.info("Time to reset the database for next round, eh?"); } else if ("3".equals(cmd)) { administartion.resetLottery(); LOGGER.info("The lottery ticket database was cleared."); } else if ("4".equals(cmd)) { exit = true; } else { LOGGER.info("Unknown command: {}", cmd); } } } } private static void printMainMenu() { LOGGER.info(""); LOGGER.info("### Lottery Administration Console ###"); LOGGER.info("(1) Show all submitted tickets"); LOGGER.info("(2) Perform lottery draw"); LOGGER.info("(3) Reset lottery ticket database"); LOGGER.info("(4) Exit"); } private static String readString(Scanner scanner) { System.out.print("> "); return scanner.next(); } } java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/banking/000077500000000000000000000000001322244523500302205ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/banking/InMemoryBank.java000066400000000000000000000042461322244523500334240ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.banking; import java.util.HashMap; import java.util.Map; import com.iluwatar.hexagonal.domain.LotteryConstants; /** * * Banking implementation * */ public class InMemoryBank implements WireTransfers { private static Map accounts = new HashMap<>(); static { accounts.put(LotteryConstants.SERVICE_BANK_ACCOUNT, LotteryConstants.SERVICE_BANK_ACCOUNT_SALDO); } @Override public void setFunds(String bankAccount, int amount) { accounts.put(bankAccount, amount); } @Override public int getFunds(String bankAccount) { return accounts.getOrDefault(bankAccount, 0); } @Override public boolean transferFunds(int amount, String sourceBackAccount, String destinationBankAccount) { if (accounts.getOrDefault(sourceBackAccount, 0) >= amount) { accounts.put(sourceBackAccount, accounts.get(sourceBackAccount) - amount); accounts.put(destinationBankAccount, accounts.get(destinationBankAccount) + amount); return true; } else { return false; } } } java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/banking/MongoBank.java000066400000000000000000000077341322244523500327510ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.banking; import com.mongodb.MongoClient; import com.mongodb.client.MongoCollection; import com.mongodb.client.MongoDatabase; import com.mongodb.client.model.UpdateOptions; import org.bson.Document; import java.util.ArrayList; import java.util.List; /** * Mongo based banking adapter */ public class MongoBank implements WireTransfers { private static final String DEFAULT_DB = "lotteryDB"; private static final String DEFAULT_ACCOUNTS_COLLECTION = "accounts"; private MongoClient mongoClient; private MongoDatabase database; private MongoCollection accountsCollection; /** * Constructor */ public MongoBank() { connect(); } /** * Constructor accepting parameters */ public MongoBank(String dbName, String accountsCollectionName) { connect(dbName, accountsCollectionName); } /** * Connect to database with default parameters */ public void connect() { connect(DEFAULT_DB, DEFAULT_ACCOUNTS_COLLECTION); } /** * Connect to database with given parameters */ public void connect(String dbName, String accountsCollectionName) { if (mongoClient != null) { mongoClient.close(); } mongoClient = new MongoClient(System.getProperty("mongo-host"), Integer.parseInt(System.getProperty("mongo-port"))); database = mongoClient.getDatabase(dbName); accountsCollection = database.getCollection(accountsCollectionName); } /** * @return mongo client */ public MongoClient getMongoClient() { return mongoClient; } /** * * @return mongo database */ public MongoDatabase getMongoDatabase() { return database; } /** * * @return accounts collection */ public MongoCollection getAccountsCollection() { return accountsCollection; } @Override public void setFunds(String bankAccount, int amount) { Document search = new Document("_id", bankAccount); Document update = new Document("_id", bankAccount).append("funds", amount); accountsCollection.updateOne(search, new Document("$set", update), new UpdateOptions().upsert(true)); } @Override public int getFunds(String bankAccount) { Document search = new Document("_id", bankAccount); List results = accountsCollection.find(search).limit(1).into(new ArrayList()); if (results.size() > 0) { return results.get(0).getInteger("funds"); } else { return 0; } } @Override public boolean transferFunds(int amount, String sourceBackAccount, String destinationBankAccount) { int sourceFunds = getFunds(sourceBackAccount); if (sourceFunds < amount) { return false; } else { int destFunds = getFunds(destinationBankAccount); setFunds(sourceBackAccount, sourceFunds - amount); setFunds(destinationBankAccount, destFunds + amount); return true; } } } WireTransfers.java000066400000000000000000000031311322244523500336000ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/banking/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.banking; /** * * Interface to bank accounts. * */ public interface WireTransfers { /** * Set amount of funds for bank account */ void setFunds(String bankAccount, int amount); /** * Get amount of funds for bank account */ int getFunds(String bankAccount); /** * Transfer funds from one bank account to another */ boolean transferFunds(int amount, String sourceBackAccount, String destinationBankAccount); } java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/database/000077500000000000000000000000001322244523500303535ustar00rootroot00000000000000InMemoryTicketRepository.java000066400000000000000000000041641322244523500361470ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/database/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.database; import java.util.HashMap; import java.util.Map; import java.util.Optional; import com.iluwatar.hexagonal.domain.LotteryTicket; import com.iluwatar.hexagonal.domain.LotteryTicketId; /** * * Mock database for lottery tickets. * */ public class InMemoryTicketRepository implements LotteryTicketRepository { private static Map tickets = new HashMap<>(); @Override public Optional findById(LotteryTicketId id) { LotteryTicket ticket = tickets.get(id); if (ticket == null) { return Optional.empty(); } else { return Optional.of(ticket); } } @Override public Optional save(LotteryTicket ticket) { LotteryTicketId id = new LotteryTicketId(); tickets.put(id, ticket); return Optional.of(id); } @Override public Map findAll() { return tickets; } @Override public void deleteAll() { tickets.clear(); } } LotteryTicketRepository.java000066400000000000000000000034251322244523500360510ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/database/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.database; import java.util.Map; import java.util.Optional; import com.iluwatar.hexagonal.domain.LotteryTicket; import com.iluwatar.hexagonal.domain.LotteryTicketId; /** * * Interface for accessing lottery tickets in database. * */ public interface LotteryTicketRepository { /** * Find lottery ticket by id */ Optional findById(LotteryTicketId id); /** * Save lottery ticket */ Optional save(LotteryTicket ticket); /** * Get all lottery tickets */ Map findAll(); /** * Delete all lottery tickets */ void deleteAll(); } MongoTicketRepository.java000066400000000000000000000144311322244523500354650ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/database/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.database; import com.iluwatar.hexagonal.domain.LotteryNumbers; import com.iluwatar.hexagonal.domain.LotteryTicket; import com.iluwatar.hexagonal.domain.LotteryTicketId; import com.iluwatar.hexagonal.domain.PlayerDetails; import com.mongodb.MongoClient; import com.mongodb.client.MongoCollection; import com.mongodb.client.MongoDatabase; import org.bson.Document; import java.util.ArrayList; import java.util.Arrays; import java.util.HashMap; import java.util.HashSet; import java.util.List; import java.util.Map; import java.util.Optional; import java.util.Set; /** * Mongo lottery ticket database */ public class MongoTicketRepository implements LotteryTicketRepository { private static final String DEFAULT_DB = "lotteryDB"; private static final String DEFAULT_TICKETS_COLLECTION = "lotteryTickets"; private static final String DEFAULT_COUNTERS_COLLECTION = "counters"; private MongoClient mongoClient; private MongoDatabase database; private MongoCollection ticketsCollection; private MongoCollection countersCollection; /** * Constructor */ public MongoTicketRepository() { connect(); } /** * Constructor accepting parameters */ public MongoTicketRepository(String dbName, String ticketsCollectionName, String countersCollectionName) { connect(dbName, ticketsCollectionName, countersCollectionName); } /** * Connect to database with default parameters */ public void connect() { connect(DEFAULT_DB, DEFAULT_TICKETS_COLLECTION, DEFAULT_COUNTERS_COLLECTION); } /** * Connect to database with given parameters */ public void connect(String dbName, String ticketsCollectionName, String countersCollectionName) { if (mongoClient != null) { mongoClient.close(); } mongoClient = new MongoClient(System.getProperty("mongo-host"), Integer.parseInt(System.getProperty("mongo-port"))); database = mongoClient.getDatabase(dbName); ticketsCollection = database.getCollection(ticketsCollectionName); countersCollection = database.getCollection(countersCollectionName); if (countersCollection.count() <= 0) { initCounters(); } } private void initCounters() { Document doc = new Document("_id", "ticketId").append("seq", 1); countersCollection.insertOne(doc); } /** * @return next ticket id */ public int getNextId() { Document find = new Document("_id", "ticketId"); Document increase = new Document("seq", 1); Document update = new Document("$inc", increase); Document result = countersCollection.findOneAndUpdate(find, update); return result.getInteger("seq"); } /** * @return mongo client */ public MongoClient getMongoClient() { return mongoClient; } /** * * @return mongo database */ public MongoDatabase getMongoDatabase() { return database; } /** * * @return tickets collection */ public MongoCollection getTicketsCollection() { return ticketsCollection; } /** * * @return counters collection */ public MongoCollection getCountersCollection() { return countersCollection; } @Override public Optional findById(LotteryTicketId id) { Document find = new Document("ticketId", id.getId()); List results = ticketsCollection.find(find).limit(1).into(new ArrayList()); if (results.size() > 0) { LotteryTicket lotteryTicket = docToTicket(results.get(0)); return Optional.of(lotteryTicket); } else { return Optional.empty(); } } @Override public Optional save(LotteryTicket ticket) { int ticketId = getNextId(); Document doc = new Document("ticketId", ticketId); doc.put("email", ticket.getPlayerDetails().getEmail()); doc.put("bank", ticket.getPlayerDetails().getBankAccount()); doc.put("phone", ticket.getPlayerDetails().getPhoneNumber()); doc.put("numbers", ticket.getNumbers().getNumbersAsString()); ticketsCollection.insertOne(doc); return Optional.of(new LotteryTicketId(ticketId)); } @Override public Map findAll() { Map map = new HashMap<>(); List docs = ticketsCollection.find(new Document()).into(new ArrayList()); for (Document doc: docs) { LotteryTicket lotteryTicket = docToTicket(doc); map.put(lotteryTicket.getId(), lotteryTicket); } return map; } @Override public void deleteAll() { ticketsCollection.deleteMany(new Document()); } private LotteryTicket docToTicket(Document doc) { PlayerDetails playerDetails = new PlayerDetails(doc.getString("email"), doc.getString("bank"), doc.getString("phone")); int[] numArray = Arrays.asList(doc.getString("numbers").split(",")).stream().mapToInt(Integer::parseInt).toArray(); Set numbers = new HashSet<>(); for (int num: numArray) { numbers.add(num); } LotteryNumbers lotteryNumbers = LotteryNumbers.create(numbers); return new LotteryTicket(new LotteryTicketId(doc.getInteger("ticketId")), playerDetails, lotteryNumbers); } } java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/domain/000077500000000000000000000000001322244523500300565ustar00rootroot00000000000000LotteryAdministration.java000066400000000000000000000064501322244523500352170ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/domain/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.domain; import com.google.inject.Inject; import com.iluwatar.hexagonal.banking.WireTransfers; import com.iluwatar.hexagonal.database.LotteryTicketRepository; import com.iluwatar.hexagonal.eventlog.LotteryEventLog; import java.util.Map; /** * * Lottery administration implementation * */ public class LotteryAdministration { private final LotteryTicketRepository repository; private final LotteryEventLog notifications; private final WireTransfers wireTransfers; /** * Constructor */ @Inject public LotteryAdministration(LotteryTicketRepository repository, LotteryEventLog notifications, WireTransfers wireTransfers) { this.repository = repository; this.notifications = notifications; this.wireTransfers = wireTransfers; } /** * Get all the lottery tickets submitted for lottery */ public Map getAllSubmittedTickets() { return repository.findAll(); } /** * Draw lottery numbers */ public LotteryNumbers performLottery() { LotteryNumbers numbers = LotteryNumbers.createRandom(); Map tickets = getAllSubmittedTickets(); for (LotteryTicketId id : tickets.keySet()) { LotteryTicketCheckResult result = LotteryUtils.checkTicketForPrize(repository, id, numbers); if (result.getResult().equals(LotteryTicketCheckResult.CheckResult.WIN_PRIZE)) { boolean transferred = wireTransfers.transferFunds(LotteryConstants.PRIZE_AMOUNT, LotteryConstants.SERVICE_BANK_ACCOUNT, tickets.get(id).getPlayerDetails().getBankAccount()); if (transferred) { notifications.ticketWon(tickets.get(id).getPlayerDetails(), LotteryConstants.PRIZE_AMOUNT); } else { notifications.prizeError(tickets.get(id).getPlayerDetails(), LotteryConstants.PRIZE_AMOUNT); } } else if (result.getResult().equals(LotteryTicketCheckResult.CheckResult.NO_PRIZE)) { notifications.ticketDidNotWin(tickets.get(id).getPlayerDetails()); } } return numbers; } /** * Begin new lottery round */ public void resetLottery() { repository.deleteAll(); } } LotteryConstants.java000066400000000000000000000030431322244523500342010ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/domain/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.domain; /** * * Lottery domain constants * */ public class LotteryConstants { private LotteryConstants() { } public static final int PRIZE_AMOUNT = 100000; public static final String SERVICE_BANK_ACCOUNT = "123-123"; public static final int TICKET_PRIZE = 3; public static final int SERVICE_BANK_ACCOUNT_SALDO = 150000; public static final int PLAYER_MAX_SALDO = 100; } LotteryNumbers.java000066400000000000000000000111311322244523500336350ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/domain/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.domain; import java.util.ArrayList; import java.util.Collections; import java.util.HashSet; import java.util.List; import java.util.PrimitiveIterator; import java.util.Random; import java.util.Set; /** * * Value object representing lottery numbers. This lottery uses sets of 4 numbers. The numbers must be unique and * between 1 and 20. * */ public class LotteryNumbers { private final Set numbers; public static final int MIN_NUMBER = 1; public static final int MAX_NUMBER = 20; public static final int NUM_NUMBERS = 4; /** * Constructor. Creates random lottery numbers. */ private LotteryNumbers() { numbers = new HashSet<>(); generateRandomNumbers(); } /** * Constructor. Uses given numbers. */ private LotteryNumbers(Set givenNumbers) { numbers = new HashSet<>(); numbers.addAll(givenNumbers); } /** * @return random LotteryNumbers */ public static LotteryNumbers createRandom() { return new LotteryNumbers(); } /** * @return given LotteryNumbers */ public static LotteryNumbers create(Set givenNumbers) { return new LotteryNumbers(givenNumbers); } /** * @return lottery numbers */ public Set getNumbers() { return Collections.unmodifiableSet(numbers); } /** * @return numbers as comma separated string */ public String getNumbersAsString() { List list = new ArrayList<>(); list.addAll(numbers); StringBuilder builder = new StringBuilder(); for (int i = 0; i < NUM_NUMBERS; i++) { builder.append(list.get(i)); if (i < NUM_NUMBERS - 1) { builder.append(","); } } return builder.toString(); } /** * Generates 4 unique random numbers between 1-20 into numbers set. */ private void generateRandomNumbers() { numbers.clear(); RandomNumberGenerator generator = new RandomNumberGenerator(MIN_NUMBER, MAX_NUMBER); while (numbers.size() < NUM_NUMBERS) { int num = generator.nextInt(); if (!numbers.contains(num)) { numbers.add(num); } } } @Override public String toString() { return "LotteryNumbers{" + "numbers=" + numbers + '}'; } /** * * Helper class for generating random numbers. * */ private static class RandomNumberGenerator { private PrimitiveIterator.OfInt randomIterator; /** * Initialize a new random number generator that generates random numbers in the range [min, max] * * @param min the min value (inclusive) * @param max the max value (inclusive) */ public RandomNumberGenerator(int min, int max) { randomIterator = new Random().ints(min, max + 1).iterator(); } /** * @return a random number in the range (min, max) */ public int nextInt() { return randomIterator.nextInt(); } } @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((numbers == null) ? 0 : numbers.hashCode()); return result; } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (obj == null) { return false; } if (getClass() != obj.getClass()) { return false; } LotteryNumbers other = (LotteryNumbers) obj; if (numbers == null) { if (other.numbers != null) { return false; } } else if (!numbers.equals(other.numbers)) { return false; } return true; } } LotteryService.java000066400000000000000000000054051322244523500336310ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/domain/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.domain; import com.google.inject.Inject; import com.iluwatar.hexagonal.banking.WireTransfers; import com.iluwatar.hexagonal.database.LotteryTicketRepository; import com.iluwatar.hexagonal.eventlog.LotteryEventLog; import java.util.Optional; /** * * Implementation for lottery service * */ public class LotteryService { private final LotteryTicketRepository repository; private final LotteryEventLog notifications; private final WireTransfers wireTransfers; /** * Constructor */ @Inject public LotteryService(LotteryTicketRepository repository, LotteryEventLog notifications, WireTransfers wireTransfers) { this.repository = repository; this.notifications = notifications; this.wireTransfers = wireTransfers; } /** * Submit lottery ticket to participate in the lottery */ public Optional submitTicket(LotteryTicket ticket) { boolean result = wireTransfers.transferFunds(LotteryConstants.TICKET_PRIZE, ticket.getPlayerDetails().getBankAccount(), LotteryConstants.SERVICE_BANK_ACCOUNT); if (!result) { notifications.ticketSubmitError(ticket.getPlayerDetails()); return Optional.empty(); } Optional optional = repository.save(ticket); if (optional.isPresent()) { notifications.ticketSubmitted(ticket.getPlayerDetails()); } return optional; } /** * Check if lottery ticket has won */ public LotteryTicketCheckResult checkTicketForPrize(LotteryTicketId id, LotteryNumbers winningNumbers) { return LotteryUtils.checkTicketForPrize(repository, id, winningNumbers); } } java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/domain/LotteryTicket.java000066400000000000000000000060151322244523500335310ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.domain; /** * * Immutable value object representing lottery ticket. * */ public class LotteryTicket { private LotteryTicketId id; private final PlayerDetails playerDetails; private final LotteryNumbers lotteryNumbers; /** * Constructor. */ public LotteryTicket(LotteryTicketId id, PlayerDetails details, LotteryNumbers numbers) { this.id = id; playerDetails = details; lotteryNumbers = numbers; } /** * @return player details */ public PlayerDetails getPlayerDetails() { return playerDetails; } /** * @return lottery numbers */ public LotteryNumbers getNumbers() { return lotteryNumbers; } /** * @return id */ public LotteryTicketId getId() { return id; } /** * set id */ public void setId(LotteryTicketId id) { this.id = id; } @Override public String toString() { return playerDetails.toString() + " " + lotteryNumbers.toString(); } @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((lotteryNumbers == null) ? 0 : lotteryNumbers.hashCode()); result = prime * result + ((playerDetails == null) ? 0 : playerDetails.hashCode()); return result; } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (obj == null) { return false; } if (getClass() != obj.getClass()) { return false; } LotteryTicket other = (LotteryTicket) obj; if (lotteryNumbers == null) { if (other.lotteryNumbers != null) { return false; } } else if (!lotteryNumbers.equals(other.lotteryNumbers)) { return false; } if (playerDetails == null) { if (other.playerDetails != null) { return false; } } else if (!playerDetails.equals(other.playerDetails)) { return false; } return true; } } LotteryTicketCheckResult.java000066400000000000000000000050371322244523500356120ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/domain/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.domain; /** * * Represents lottery ticket check result. * */ public class LotteryTicketCheckResult { /** * Enumeration of Type of Outcomes of a Lottery */ public enum CheckResult { WIN_PRIZE, NO_PRIZE, TICKET_NOT_SUBMITTED } private final CheckResult checkResult; private final int prizeAmount; /** * Constructor. */ public LotteryTicketCheckResult(CheckResult result) { checkResult = result; prizeAmount = 0; } /** * Constructor. */ public LotteryTicketCheckResult(CheckResult result, int amount) { checkResult = result; prizeAmount = amount; } /** * @return check result */ public CheckResult getResult() { return checkResult; } /** * @return prize amount */ public int getPrizeAmount() { return prizeAmount; } @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((checkResult == null) ? 0 : checkResult.hashCode()); result = prime * result + prizeAmount; return result; } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (obj == null) { return false; } if (getClass() != obj.getClass()) { return false; } LotteryTicketCheckResult other = (LotteryTicketCheckResult) obj; return checkResult == other.checkResult && prizeAmount == other.prizeAmount; } } LotteryTicketId.java000066400000000000000000000035541322244523500337340ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/domain/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.domain; /** * Lottery ticked id */ public class LotteryTicketId { private static volatile int numAllocated; private final int id; public LotteryTicketId() { this.id = numAllocated + 1; numAllocated++; } public LotteryTicketId(int id) { this.id = id; } public int getId() { return id; } @Override public String toString() { return String.format("%d", id); } @Override public boolean equals(Object o) { if (this == o) { return true; } if (o == null || getClass() != o.getClass()) { return false; } LotteryTicketId that = (LotteryTicketId) o; return id == that.id; } @Override public int hashCode() { return id; } } java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/domain/LotteryUtils.java000066400000000000000000000041131322244523500334030ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.domain; import com.iluwatar.hexagonal.database.LotteryTicketRepository; import java.util.Optional; /** * Lottery utilities */ public class LotteryUtils { private LotteryUtils() { } /** * Checks if lottery ticket has won */ public static LotteryTicketCheckResult checkTicketForPrize(LotteryTicketRepository repository, LotteryTicketId id, LotteryNumbers winningNumbers) { Optional optional = repository.findById(id); if (optional.isPresent()) { if (optional.get().getNumbers().equals(winningNumbers)) { return new LotteryTicketCheckResult(LotteryTicketCheckResult.CheckResult.WIN_PRIZE, 1000); } else { return new LotteryTicketCheckResult(LotteryTicketCheckResult.CheckResult.NO_PRIZE); } } else { return new LotteryTicketCheckResult(LotteryTicketCheckResult.CheckResult.TICKET_NOT_SUBMITTED); } } } java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/domain/PlayerDetails.java000066400000000000000000000064641322244523500334750ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.domain; /** * * Immutable value object containing lottery player details. * */ public class PlayerDetails { private final String emailAddress; private final String bankAccountNumber; private final String phoneNumber; /** * Constructor. */ public PlayerDetails(String email, String bankAccount, String phone) { emailAddress = email; bankAccountNumber = bankAccount; phoneNumber = phone; } /** * @return email */ public String getEmail() { return emailAddress; } /** * @return bank account number */ public String getBankAccount() { return bankAccountNumber; } /** * @return phone number */ public String getPhoneNumber() { return phoneNumber; } @Override public String toString() { return "PlayerDetails{" + "emailAddress='" + emailAddress + '\'' + ", bankAccountNumber='" + bankAccountNumber + '\'' + ", phoneNumber='" + phoneNumber + '\'' + '}'; } @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((bankAccountNumber == null) ? 0 : bankAccountNumber.hashCode()); result = prime * result + ((emailAddress == null) ? 0 : emailAddress.hashCode()); result = prime * result + ((phoneNumber == null) ? 0 : phoneNumber.hashCode()); return result; } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (obj == null) { return false; } if (getClass() != obj.getClass()) { return false; } PlayerDetails other = (PlayerDetails) obj; if (bankAccountNumber == null) { if (other.bankAccountNumber != null) { return false; } } else if (!bankAccountNumber.equals(other.bankAccountNumber)) { return false; } if (emailAddress == null) { if (other.emailAddress != null) { return false; } } else if (!emailAddress.equals(other.emailAddress)) { return false; } if (phoneNumber == null) { if (other.phoneNumber != null) { return false; } } else if (!phoneNumber.equals(other.phoneNumber)) { return false; } return true; } } java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/eventlog/000077500000000000000000000000001322244523500304325ustar00rootroot00000000000000LotteryEventLog.java000066400000000000000000000034111322244523500343230ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/eventlog/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.eventlog; import com.iluwatar.hexagonal.domain.PlayerDetails; /** * * Event log for lottery events * */ public interface LotteryEventLog { /** * lottery ticket submitted */ void ticketSubmitted(PlayerDetails details); /** * error submitting lottery ticket */ void ticketSubmitError(PlayerDetails details); /** * lottery ticket did not win */ void ticketDidNotWin(PlayerDetails details); /** * lottery ticket won */ void ticketWon(PlayerDetails details, int prizeAmount); /** * error paying the prize */ void prizeError(PlayerDetails details, int prizeAmount); } MongoEventLog.java000066400000000000000000000122061322244523500337420ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/eventlog/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.eventlog; import com.iluwatar.hexagonal.domain.PlayerDetails; import com.mongodb.MongoClient; import com.mongodb.client.MongoCollection; import com.mongodb.client.MongoDatabase; import org.bson.Document; /** * Mongo based event log */ public class MongoEventLog implements LotteryEventLog { private static final String DEFAULT_DB = "lotteryDB"; private static final String DEFAULT_EVENTS_COLLECTION = "events"; private MongoClient mongoClient; private MongoDatabase database; private MongoCollection eventsCollection; private StdOutEventLog stdOutEventLog = new StdOutEventLog(); /** * Constructor */ public MongoEventLog() { connect(); } /** * Constructor accepting parameters */ public MongoEventLog(String dbName, String eventsCollectionName) { connect(dbName, eventsCollectionName); } /** * Connect to database with default parameters */ public void connect() { connect(DEFAULT_DB, DEFAULT_EVENTS_COLLECTION); } /** * Connect to database with given parameters */ public void connect(String dbName, String eventsCollectionName) { if (mongoClient != null) { mongoClient.close(); } mongoClient = new MongoClient(System.getProperty("mongo-host"), Integer.parseInt(System.getProperty("mongo-port"))); database = mongoClient.getDatabase(dbName); eventsCollection = database.getCollection(eventsCollectionName); } /** * @return mongo client */ public MongoClient getMongoClient() { return mongoClient; } /** * * @return mongo database */ public MongoDatabase getMongoDatabase() { return database; } /** * * @return accounts collection */ public MongoCollection getEventsCollection() { return eventsCollection; } @Override public void ticketSubmitted(PlayerDetails details) { Document document = new Document("email", details.getEmail()); document.put("phone", details.getPhoneNumber()); document.put("bank", details.getBankAccount()); document.put("message", "Lottery ticket was submitted and bank account was charged for 3 credits."); eventsCollection.insertOne(document); stdOutEventLog.ticketSubmitted(details); } @Override public void ticketSubmitError(PlayerDetails details) { Document document = new Document("email", details.getEmail()); document.put("phone", details.getPhoneNumber()); document.put("bank", details.getBankAccount()); document.put("message", "Lottery ticket could not be submitted because lack of funds."); eventsCollection.insertOne(document); stdOutEventLog.ticketSubmitError(details); } @Override public void ticketDidNotWin(PlayerDetails details) { Document document = new Document("email", details.getEmail()); document.put("phone", details.getPhoneNumber()); document.put("bank", details.getBankAccount()); document.put("message", "Lottery ticket was checked and unfortunately did not win this time."); eventsCollection.insertOne(document); stdOutEventLog.ticketDidNotWin(details); } @Override public void ticketWon(PlayerDetails details, int prizeAmount) { Document document = new Document("email", details.getEmail()); document.put("phone", details.getPhoneNumber()); document.put("bank", details.getBankAccount()); document.put("message", String.format("Lottery ticket won! The bank account was deposited with %d credits.", prizeAmount)); eventsCollection.insertOne(document); stdOutEventLog.ticketWon(details, prizeAmount); } @Override public void prizeError(PlayerDetails details, int prizeAmount) { Document document = new Document("email", details.getEmail()); document.put("phone", details.getPhoneNumber()); document.put("bank", details.getBankAccount()); document.put("message", String.format("Lottery ticket won! Unfortunately the bank credit transfer of %d failed.", prizeAmount)); eventsCollection.insertOne(document); stdOutEventLog.prizeError(details, prizeAmount); } } StdOutEventLog.java000066400000000000000000000050541322244523500341100ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/eventlog/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.eventlog; import com.iluwatar.hexagonal.domain.PlayerDetails; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Standard output event log */ public class StdOutEventLog implements LotteryEventLog { private static final Logger LOGGER = LoggerFactory.getLogger(StdOutEventLog.class); @Override public void ticketSubmitted(PlayerDetails details) { LOGGER.info("Lottery ticket for {} was submitted. Bank account {} was charged for 3 credits.", details.getEmail(), details.getBankAccount()); } @Override public void ticketDidNotWin(PlayerDetails details) { LOGGER.info("Lottery ticket for {} was checked and unfortunately did not win this time.", details.getEmail()); } @Override public void ticketWon(PlayerDetails details, int prizeAmount) { LOGGER.info("Lottery ticket for {} has won! The bank account {} was deposited with {} credits.", details.getEmail(), details.getBankAccount(), prizeAmount); } @Override public void prizeError(PlayerDetails details, int prizeAmount) { LOGGER.error("Lottery ticket for {} has won! Unfortunately the bank credit transfer of {} failed.", details.getEmail(), prizeAmount); } @Override public void ticketSubmitError(PlayerDetails details) { LOGGER.error("Lottery ticket for {} could not be submitted because the credit transfer of 3 credits failed.", details.getEmail()); } } java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/module/000077500000000000000000000000001322244523500300745ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/module/LotteryModule.java000066400000000000000000000035631322244523500335560ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.module; import com.google.inject.AbstractModule; import com.iluwatar.hexagonal.banking.MongoBank; import com.iluwatar.hexagonal.banking.WireTransfers; import com.iluwatar.hexagonal.database.LotteryTicketRepository; import com.iluwatar.hexagonal.database.MongoTicketRepository; import com.iluwatar.hexagonal.eventlog.LotteryEventLog; import com.iluwatar.hexagonal.eventlog.MongoEventLog; /** * Guice module for binding production dependencies */ public class LotteryModule extends AbstractModule { @Override protected void configure() { bind(LotteryTicketRepository.class).to(MongoTicketRepository.class); bind(LotteryEventLog.class).to(MongoEventLog.class); bind(WireTransfers.class).to(MongoBank.class); } } LotteryTestingModule.java000066400000000000000000000035751322244523500350400ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/module/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.module; import com.google.inject.AbstractModule; import com.iluwatar.hexagonal.banking.InMemoryBank; import com.iluwatar.hexagonal.banking.WireTransfers; import com.iluwatar.hexagonal.database.InMemoryTicketRepository; import com.iluwatar.hexagonal.database.LotteryTicketRepository; import com.iluwatar.hexagonal.eventlog.LotteryEventLog; import com.iluwatar.hexagonal.eventlog.StdOutEventLog; /** * Guice module for testing dependencies */ public class LotteryTestingModule extends AbstractModule { @Override protected void configure() { bind(LotteryTicketRepository.class).to(InMemoryTicketRepository.class); bind(LotteryEventLog.class).to(StdOutEventLog.class); bind(WireTransfers.class).to(InMemoryBank.class); } } java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/mongo/000077500000000000000000000000001322244523500277265ustar00rootroot00000000000000MongoConnectionPropertiesLoader.java000066400000000000000000000043011322244523500370130ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/mongo/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.mongo; import java.io.FileInputStream; import java.util.Properties; /** * Mongo connection properties loader */ public class MongoConnectionPropertiesLoader { private static final String DEFAULT_HOST = "localhost"; private static final int DEFAULT_PORT = 27017; /** * Try to load connection properties from file. * Fall back to default connection properties. */ public static void load() { String host = DEFAULT_HOST; int port = DEFAULT_PORT; String path = System.getProperty("hexagonal.properties.path"); Properties properties = new Properties(); if (path != null) { try (FileInputStream fin = new FileInputStream(path)) { properties.load(fin); host = properties.getProperty("mongo-host"); port = Integer.parseInt(properties.getProperty("mongo-port")); } catch (Exception e) { // error occurred, use default properties e.printStackTrace(); } } System.setProperty("mongo-host", host); System.setProperty("mongo-port", String.format("%d", port)); } } java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/sampledata/000077500000000000000000000000001322244523500307225ustar00rootroot00000000000000SampleData.java000066400000000000000000000132411322244523500335220ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/sampledata/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.sampledata; import com.iluwatar.hexagonal.banking.InMemoryBank; import com.iluwatar.hexagonal.domain.LotteryConstants; import com.iluwatar.hexagonal.domain.LotteryNumbers; import com.iluwatar.hexagonal.domain.LotteryService; import com.iluwatar.hexagonal.domain.LotteryTicket; import com.iluwatar.hexagonal.domain.LotteryTicketId; import com.iluwatar.hexagonal.domain.PlayerDetails; import java.util.ArrayList; import java.util.List; import java.util.Random; /** * Utilities for creating sample lottery tickets */ public class SampleData { private static final List PLAYERS; static { PLAYERS = new ArrayList<>(); PLAYERS.add(new PlayerDetails("john@google.com", "312-342", "+3242434242")); PLAYERS.add(new PlayerDetails("mary@google.com", "234-987", "+23452346")); PLAYERS.add(new PlayerDetails("steve@google.com", "833-836", "+63457543")); PLAYERS.add(new PlayerDetails("wayne@google.com", "319-826", "+24626")); PLAYERS.add(new PlayerDetails("johnie@google.com", "983-322", "+3635635")); PLAYERS.add(new PlayerDetails("andy@google.com", "934-734", "+0898245")); PLAYERS.add(new PlayerDetails("richard@google.com", "536-738", "+09845325")); PLAYERS.add(new PlayerDetails("kevin@google.com", "453-936", "+2423532")); PLAYERS.add(new PlayerDetails("arnold@google.com", "114-988", "+5646346524")); PLAYERS.add(new PlayerDetails("ian@google.com", "663-765", "+928394235")); PLAYERS.add(new PlayerDetails("robin@google.com", "334-763", "+35448")); PLAYERS.add(new PlayerDetails("ted@google.com", "735-964", "+98752345")); PLAYERS.add(new PlayerDetails("larry@google.com", "734-853", "+043842423")); PLAYERS.add(new PlayerDetails("calvin@google.com", "334-746", "+73294135")); PLAYERS.add(new PlayerDetails("jacob@google.com", "444-766", "+358042354")); PLAYERS.add(new PlayerDetails("edwin@google.com", "895-345", "+9752435")); PLAYERS.add(new PlayerDetails("mary@google.com", "760-009", "+34203542")); PLAYERS.add(new PlayerDetails("lolita@google.com", "425-907", "+9872342")); PLAYERS.add(new PlayerDetails("bruno@google.com", "023-638", "+673824122")); PLAYERS.add(new PlayerDetails("peter@google.com", "335-886", "+5432503945")); PLAYERS.add(new PlayerDetails("warren@google.com", "225-946", "+9872341324")); PLAYERS.add(new PlayerDetails("monica@google.com", "265-748", "+134124")); PLAYERS.add(new PlayerDetails("ollie@google.com", "190-045", "+34453452")); PLAYERS.add(new PlayerDetails("yngwie@google.com", "241-465", "+9897641231")); PLAYERS.add(new PlayerDetails("lars@google.com", "746-936", "+42345298345")); PLAYERS.add(new PlayerDetails("bobbie@google.com", "946-384", "+79831742")); PLAYERS.add(new PlayerDetails("tyron@google.com", "310-992", "+0498837412")); PLAYERS.add(new PlayerDetails("tyrell@google.com", "032-045", "+67834134")); PLAYERS.add(new PlayerDetails("nadja@google.com", "000-346", "+498723")); PLAYERS.add(new PlayerDetails("wendy@google.com", "994-989", "+987324454")); PLAYERS.add(new PlayerDetails("luke@google.com", "546-634", "+987642435")); PLAYERS.add(new PlayerDetails("bjorn@google.com", "342-874", "+7834325")); PLAYERS.add(new PlayerDetails("lisa@google.com", "024-653", "+980742154")); PLAYERS.add(new PlayerDetails("anton@google.com", "834-935", "+876423145")); PLAYERS.add(new PlayerDetails("bruce@google.com", "284-936", "+09843212345")); PLAYERS.add(new PlayerDetails("ray@google.com", "843-073", "+678324123")); PLAYERS.add(new PlayerDetails("ron@google.com", "637-738", "+09842354")); PLAYERS.add(new PlayerDetails("xavier@google.com", "143-947", "+375245")); PLAYERS.add(new PlayerDetails("harriet@google.com", "842-404", "+131243252")); InMemoryBank wireTransfers = new InMemoryBank(); Random random = new Random(); for (int i = 0; i < PLAYERS.size(); i++) { wireTransfers.setFunds(PLAYERS.get(i).getBankAccount(), random.nextInt(LotteryConstants.PLAYER_MAX_SALDO)); } } /** * Inserts lottery tickets into the database based on the sample data */ public static void submitTickets(LotteryService lotteryService, int numTickets) { for (int i = 0; i < numTickets; i++) { LotteryTicket ticket = new LotteryTicket(new LotteryTicketId(), getRandomPlayerDetails(), LotteryNumbers.createRandom()); lotteryService.submitTicket(ticket); } } private static PlayerDetails getRandomPlayerDetails() { Random random = new Random(); int idx = random.nextInt(PLAYERS.size()); return PLAYERS.get(idx); } } java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/service/000077500000000000000000000000001322244523500302475ustar00rootroot00000000000000ConsoleLottery.java000066400000000000000000000147621322244523500340320ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/main/java/com/iluwatar/hexagonal/service/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.service; import com.google.inject.Guice; import com.google.inject.Injector; import com.iluwatar.hexagonal.banking.WireTransfers; import com.iluwatar.hexagonal.domain.LotteryNumbers; import com.iluwatar.hexagonal.domain.LotteryService; import com.iluwatar.hexagonal.domain.LotteryTicket; import com.iluwatar.hexagonal.domain.LotteryTicketCheckResult; import com.iluwatar.hexagonal.domain.LotteryTicketId; import com.iluwatar.hexagonal.domain.PlayerDetails; import com.iluwatar.hexagonal.module.LotteryModule; import com.iluwatar.hexagonal.mongo.MongoConnectionPropertiesLoader; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.HashSet; import java.util.Optional; import java.util.Scanner; import java.util.Set; /** * Console interface for lottery players */ public class ConsoleLottery { private static final Logger LOGGER = LoggerFactory.getLogger(ConsoleLottery.class); /** * Program entry point */ public static void main(String[] args) { MongoConnectionPropertiesLoader.load(); Injector injector = Guice.createInjector(new LotteryModule()); LotteryService service = injector.getInstance(LotteryService.class); WireTransfers bank = injector.getInstance(WireTransfers.class); try (final Scanner scanner = new Scanner(System.in)) { boolean exit = false; while (!exit) { printMainMenu(); String cmd = readString(scanner); if ("1".equals(cmd)) { queryLotteryAccountFunds(bank, scanner); } else if ("2".equals(cmd)) { addFundsToLotteryAccount(bank, scanner); } else if ("3".equals(cmd)) { submitTicket(service, scanner); } else if ("4".equals(cmd)) { checkTicket(service, scanner); } else if ("5".equals(cmd)) { exit = true; } else { LOGGER.info("Unknown command"); } } } } private static void checkTicket(LotteryService service, Scanner scanner) { LOGGER.info("What is the ID of the lottery ticket?"); String id = readString(scanner); LOGGER.info("Give the 4 comma separated winning numbers?"); String numbers = readString(scanner); try { String[] parts = numbers.split(","); Set winningNumbers = new HashSet<>(); for (int i = 0; i < 4; i++) { winningNumbers.add(Integer.parseInt(parts[i])); } LotteryTicketCheckResult result = service.checkTicketForPrize( new LotteryTicketId(Integer.parseInt(id)), LotteryNumbers.create(winningNumbers)); if (result.getResult().equals(LotteryTicketCheckResult.CheckResult.WIN_PRIZE)) { LOGGER.info("Congratulations! The lottery ticket has won!"); } else if (result.getResult().equals(LotteryTicketCheckResult.CheckResult.NO_PRIZE)) { LOGGER.info("Unfortunately the lottery ticket did not win."); } else { LOGGER.info("Such lottery ticket has not been submitted."); } } catch (Exception e) { LOGGER.info("Failed checking the lottery ticket - please try again."); } } private static void submitTicket(LotteryService service, Scanner scanner) { LOGGER.info("What is your email address?"); String email = readString(scanner); LOGGER.info("What is your bank account number?"); String account = readString(scanner); LOGGER.info("What is your phone number?"); String phone = readString(scanner); PlayerDetails details = new PlayerDetails(email, account, phone); LOGGER.info("Give 4 comma separated lottery numbers?"); String numbers = readString(scanner); try { String[] parts = numbers.split(","); Set chosen = new HashSet<>(); for (int i = 0; i < 4; i++) { chosen.add(Integer.parseInt(parts[i])); } LotteryNumbers lotteryNumbers = LotteryNumbers.create(chosen); LotteryTicket lotteryTicket = new LotteryTicket(new LotteryTicketId(), details, lotteryNumbers); Optional id = service.submitTicket(lotteryTicket); if (id.isPresent()) { LOGGER.info("Submitted lottery ticket with id: {}", id.get()); } else { LOGGER.info("Failed submitting lottery ticket - please try again."); } } catch (Exception e) { LOGGER.info("Failed submitting lottery ticket - please try again."); } } private static void addFundsToLotteryAccount(WireTransfers bank, Scanner scanner) { LOGGER.info("What is the account number?"); String account = readString(scanner); LOGGER.info("How many credits do you want to deposit?"); String amount = readString(scanner); bank.setFunds(account, Integer.parseInt(amount)); LOGGER.info("The account {} now has {} credits.", account, bank.getFunds(account)); } private static void queryLotteryAccountFunds(WireTransfers bank, Scanner scanner) { LOGGER.info("What is the account number?"); String account = readString(scanner); LOGGER.info("The account {} has {} credits.", account, bank.getFunds(account)); } private static void printMainMenu() { LOGGER.info(""); LOGGER.info("### Lottery Service Console ###"); LOGGER.info("(1) Query lottery account funds"); LOGGER.info("(2) Add funds to lottery account"); LOGGER.info("(3) Submit ticket"); LOGGER.info("(4) Check ticket"); LOGGER.info("(5) Exit"); } private static String readString(Scanner scanner) { System.out.print("> "); return scanner.next(); } } java-design-patterns-1.18.0/hexagonal/src/test/000077500000000000000000000000001322244523500213455ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/test/java/000077500000000000000000000000001322244523500222665ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/test/java/com/000077500000000000000000000000001322244523500230445ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500246745ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/hexagonal/000077500000000000000000000000001322244523500266425ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/hexagonal/AppTest.java000066400000000000000000000025171322244523500310720ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal; import org.junit.jupiter.api.Test; /** * Unit test for simple App. */ public class AppTest { @Test public void testApp() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/hexagonal/banking/000077500000000000000000000000001322244523500302535ustar00rootroot00000000000000InMemoryBankTest.java000066400000000000000000000034741322244523500342420ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/hexagonal/banking/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.banking; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertTrue; /** * * Tests for banking * */ public class InMemoryBankTest { private final WireTransfers bank = new InMemoryBank(); @Test public void testInit() { assertEquals(bank.getFunds("foo"), 0); bank.setFunds("foo", 100); assertEquals(bank.getFunds("foo"), 100); bank.setFunds("bar", 150); assertEquals(bank.getFunds("bar"), 150); assertTrue(bank.transferFunds(50, "bar", "foo")); assertEquals(bank.getFunds("foo"), 150); assertEquals(bank.getFunds("bar"), 100); } } MongoBankTest.java000066400000000000000000000050211322244523500335500ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/hexagonal/banking/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.banking; import com.iluwatar.hexagonal.mongo.MongoConnectionPropertiesLoader; import com.mongodb.MongoClient; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Disabled; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Tests for Mongo banking adapter */ @Disabled public class MongoBankTest { private static final String TEST_DB = "lotteryDBTest"; private static final String TEST_ACCOUNTS_COLLECTION = "testAccounts"; private MongoBank mongoBank; @BeforeEach public void init() { MongoConnectionPropertiesLoader.load(); MongoClient mongoClient = new MongoClient(System.getProperty("mongo-host"), Integer.parseInt(System.getProperty("mongo-port"))); mongoClient.dropDatabase(TEST_DB); mongoClient.close(); mongoBank = new MongoBank(TEST_DB, TEST_ACCOUNTS_COLLECTION); } @Test public void testSetup() { assertEquals(0, mongoBank.getAccountsCollection().count()); } @Test public void testFundTransfers() { assertEquals(0, mongoBank.getFunds("000-000")); mongoBank.setFunds("000-000", 10); assertEquals(10, mongoBank.getFunds("000-000")); assertEquals(0, mongoBank.getFunds("111-111")); mongoBank.transferFunds(9, "000-000", "111-111"); assertEquals(1, mongoBank.getFunds("000-000")); assertEquals(9, mongoBank.getFunds("111-111")); } } java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/hexagonal/database/000077500000000000000000000000001322244523500304065ustar00rootroot00000000000000InMemoryTicketRepositoryTest.java000066400000000000000000000044451322244523500370440ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/hexagonal/database/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.database; import java.util.Optional; import com.iluwatar.hexagonal.domain.LotteryTicket; import com.iluwatar.hexagonal.domain.LotteryTicketId; import com.iluwatar.hexagonal.test.LotteryTestUtils; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertTrue; /** * * Tests for {@link LotteryTicketRepository} * */ public class InMemoryTicketRepositoryTest { private final LotteryTicketRepository repository = new InMemoryTicketRepository(); @BeforeEach public void clear() { repository.deleteAll(); } @Test public void testCrudOperations() { LotteryTicketRepository repository = new InMemoryTicketRepository(); assertEquals(repository.findAll().size(), 0); LotteryTicket ticket = LotteryTestUtils.createLotteryTicket(); Optional id = repository.save(ticket); assertTrue(id.isPresent()); assertEquals(repository.findAll().size(), 1); Optional optionalTicket = repository.findById(id.get()); assertTrue(optionalTicket.isPresent()); } } MongoTicketRepositoryTest.java000066400000000000000000000076171322244523500363700ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/hexagonal/database/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.database; import com.iluwatar.hexagonal.domain.LotteryNumbers; import com.iluwatar.hexagonal.domain.LotteryTicket; import com.iluwatar.hexagonal.domain.LotteryTicketId; import com.iluwatar.hexagonal.domain.PlayerDetails; import com.iluwatar.hexagonal.mongo.MongoConnectionPropertiesLoader; import com.mongodb.MongoClient; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Disabled; import org.junit.jupiter.api.Test; import java.util.Optional; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Tests for Mongo based ticket repository */ @Disabled public class MongoTicketRepositoryTest { private static final String TEST_DB = "lotteryTestDB"; private static final String TEST_TICKETS_COLLECTION = "lotteryTestTickets"; private static final String TEST_COUNTERS_COLLECTION = "testCounters"; private MongoTicketRepository repository; @BeforeEach public void init() { MongoConnectionPropertiesLoader.load(); MongoClient mongoClient = new MongoClient(System.getProperty("mongo-host"), Integer.parseInt(System.getProperty("mongo-port"))); mongoClient.dropDatabase(TEST_DB); mongoClient.close(); repository = new MongoTicketRepository(TEST_DB, TEST_TICKETS_COLLECTION, TEST_COUNTERS_COLLECTION); } @Test public void testSetup() { assertTrue(repository.getCountersCollection().count() == 1); assertTrue(repository.getTicketsCollection().count() == 0); } @Test public void testNextId() { assertEquals(1, repository.getNextId()); assertEquals(2, repository.getNextId()); assertEquals(3, repository.getNextId()); } @Test public void testCrudOperations() { // create new lottery ticket and save it PlayerDetails details = new PlayerDetails("foo@bar.com", "123-123", "07001234"); LotteryNumbers random = LotteryNumbers.createRandom(); LotteryTicket original = new LotteryTicket(new LotteryTicketId(), details, random); Optional saved = repository.save(original); assertEquals(1, repository.getTicketsCollection().count()); assertTrue(saved.isPresent()); // fetch the saved lottery ticket from database and check its contents Optional found = repository.findById(saved.get()); assertTrue(found.isPresent()); LotteryTicket ticket = found.get(); assertEquals("foo@bar.com", ticket.getPlayerDetails().getEmail()); assertEquals("123-123", ticket.getPlayerDetails().getBankAccount()); assertEquals("07001234", ticket.getPlayerDetails().getPhoneNumber()); assertEquals(original.getNumbers(), ticket.getNumbers()); // clear the collection repository.deleteAll(); assertEquals(0, repository.getTicketsCollection().count()); } } java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/hexagonal/domain/000077500000000000000000000000001322244523500301115ustar00rootroot00000000000000LotteryNumbersTest.java000066400000000000000000000055621322244523500345430ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/hexagonal/domain/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.domain; import org.junit.jupiter.api.Test; import java.util.Arrays; import java.util.HashSet; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertThrows; import static org.junit.jupiter.api.Assertions.assertTrue; /** * * Unit tests for {@link LotteryNumbers} * */ public class LotteryNumbersTest { @Test public void testGivenNumbers() { LotteryNumbers numbers = LotteryNumbers.create( new HashSet<>(Arrays.asList(1, 2, 3, 4))); assertEquals(numbers.getNumbers().size(), 4); assertTrue(numbers.getNumbers().contains(1)); assertTrue(numbers.getNumbers().contains(2)); assertTrue(numbers.getNumbers().contains(3)); assertTrue(numbers.getNumbers().contains(4)); } @Test public void testNumbersCantBeModified() { LotteryNumbers numbers = LotteryNumbers.create( new HashSet<>(Arrays.asList(1, 2, 3, 4))); assertThrows(UnsupportedOperationException.class, () -> { numbers.getNumbers().add(5); }); } @Test public void testRandomNumbers() { LotteryNumbers numbers = LotteryNumbers.createRandom(); assertEquals(numbers.getNumbers().size(), LotteryNumbers.NUM_NUMBERS); } @Test public void testEquals() { LotteryNumbers numbers1 = LotteryNumbers.create( new HashSet<>(Arrays.asList(1, 2, 3, 4))); LotteryNumbers numbers2 = LotteryNumbers.create( new HashSet<>(Arrays.asList(1, 2, 3, 4))); assertTrue(numbers1.equals(numbers2)); LotteryNumbers numbers3 = LotteryNumbers.create( new HashSet<>(Arrays.asList(11, 12, 13, 14))); assertFalse(numbers1.equals(numbers3)); } } java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/hexagonal/domain/LotteryTest.java000066400000000000000000000111421322244523500332550ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.domain; import com.google.inject.Guice; import com.google.inject.Inject; import com.google.inject.Injector; import com.iluwatar.hexagonal.banking.WireTransfers; import com.iluwatar.hexagonal.domain.LotteryTicketCheckResult.CheckResult; import com.iluwatar.hexagonal.module.LotteryTestingModule; import com.iluwatar.hexagonal.test.LotteryTestUtils; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import java.util.Arrays; import java.util.HashSet; import java.util.Map; import java.util.Optional; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertTrue; /** * * Test the lottery system * */ public class LotteryTest { private Injector injector; @Inject private LotteryAdministration administration; @Inject private LotteryService service; @Inject private WireTransfers wireTransfers; public LotteryTest() { this.injector = Guice.createInjector(new LotteryTestingModule()); } @BeforeEach public void setup() { injector.injectMembers(this); // add funds to the test player's bank account wireTransfers.setFunds("123-12312", 100); } @Test public void testLottery() { // admin resets the lottery administration.resetLottery(); assertEquals(administration.getAllSubmittedTickets().size(), 0); // players submit the lottery tickets Optional ticket1 = service.submitTicket(LotteryTestUtils.createLotteryTicket("cvt@bbb.com", "123-12312", "+32425255", new HashSet<>(Arrays.asList(1, 2, 3, 4)))); assertTrue(ticket1.isPresent()); Optional ticket2 = service.submitTicket(LotteryTestUtils.createLotteryTicket("ant@bac.com", "123-12312", "+32423455", new HashSet<>(Arrays.asList(11, 12, 13, 14)))); assertTrue(ticket2.isPresent()); Optional ticket3 = service.submitTicket(LotteryTestUtils.createLotteryTicket("arg@boo.com", "123-12312", "+32421255", new HashSet<>(Arrays.asList(6, 8, 13, 19)))); assertTrue(ticket3.isPresent()); assertEquals(administration.getAllSubmittedTickets().size(), 3); // perform lottery LotteryNumbers winningNumbers = administration.performLottery(); // cheat a bit for testing sake, use winning numbers to submit another ticket Optional ticket4 = service.submitTicket(LotteryTestUtils.createLotteryTicket("lucky@orb.com", "123-12312", "+12421255", winningNumbers.getNumbers())); assertTrue(ticket4.isPresent()); assertEquals(administration.getAllSubmittedTickets().size(), 4); // check winners Map tickets = administration.getAllSubmittedTickets(); for (LotteryTicketId id: tickets.keySet()) { LotteryTicketCheckResult checkResult = service.checkTicketForPrize(id, winningNumbers); assertTrue(checkResult.getResult() != CheckResult.TICKET_NOT_SUBMITTED); if (checkResult.getResult().equals(CheckResult.WIN_PRIZE)) { assertTrue(checkResult.getPrizeAmount() > 0); } else if (checkResult.getResult().equals(CheckResult.WIN_PRIZE)) { assertEquals(checkResult.getPrizeAmount(), 0); } } // check another ticket that has not been submitted LotteryTicketCheckResult checkResult = service.checkTicketForPrize(new LotteryTicketId(), winningNumbers); assertTrue(checkResult.getResult() == CheckResult.TICKET_NOT_SUBMITTED); assertEquals(checkResult.getPrizeAmount(), 0); } } LotteryTicketCheckResultTest.java000066400000000000000000000036151322244523500365050ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/hexagonal/domain/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.domain; import com.iluwatar.hexagonal.domain.LotteryTicketCheckResult.CheckResult; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; /** * * Unit tests for {@link LotteryTicketCheckResult} * */ public class LotteryTicketCheckResultTest { @Test public void testEquals() { LotteryTicketCheckResult result1 = new LotteryTicketCheckResult(CheckResult.NO_PRIZE); LotteryTicketCheckResult result2 = new LotteryTicketCheckResult(CheckResult.NO_PRIZE); assertEquals(result1, result2); LotteryTicketCheckResult result3 = new LotteryTicketCheckResult(CheckResult.WIN_PRIZE, 300000); assertFalse(result1.equals(result3)); } } LotteryTicketIdTest.java000066400000000000000000000034511322244523500346230ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/hexagonal/domain/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.domain; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Tests for lottery ticket id */ public class LotteryTicketIdTest { @Test public void testEquals() { LotteryTicketId ticketId1 = new LotteryTicketId(); LotteryTicketId ticketId2 = new LotteryTicketId(); LotteryTicketId ticketId3 = new LotteryTicketId(); assertFalse(ticketId1.equals(ticketId2)); assertFalse(ticketId2.equals(ticketId3)); LotteryTicketId ticketId4 = new LotteryTicketId(ticketId1.getId()); assertTrue(ticketId1.equals(ticketId4)); } } LotteryTicketTest.java000066400000000000000000000046151322244523500343510ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/hexagonal/domain/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.domain; import org.junit.jupiter.api.Test; import java.util.Arrays; import java.util.HashSet; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; /** * Test Lottery Tickets for equality */ public class LotteryTicketTest { @Test public void testEquals() { PlayerDetails details1 = new PlayerDetails("bob@foo.bar", "1212-121212", "+34332322"); LotteryNumbers numbers1 = LotteryNumbers.create(new HashSet(Arrays.asList(1, 2, 3, 4))); LotteryTicket ticket1 = new LotteryTicket(new LotteryTicketId(), details1, numbers1); PlayerDetails details2 = new PlayerDetails("bob@foo.bar", "1212-121212", "+34332322"); LotteryNumbers numbers2 = LotteryNumbers.create(new HashSet(Arrays.asList(1, 2, 3, 4))); LotteryTicket ticket2 = new LotteryTicket(new LotteryTicketId(), details2, numbers2); assertEquals(ticket1, ticket2); PlayerDetails details3 = new PlayerDetails("elsa@foo.bar", "1223-121212", "+49332322"); LotteryNumbers numbers3 = LotteryNumbers.create(new HashSet(Arrays.asList(1, 2, 3, 8))); LotteryTicket ticket3 = new LotteryTicket(new LotteryTicketId(), details3, numbers3); assertFalse(ticket1.equals(ticket3)); } } PlayerDetailsTest.java000066400000000000000000000034541322244523500343050ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/hexagonal/domain/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.domain; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; /** * * Unit tests for {@link PlayerDetails} * */ public class PlayerDetailsTest { @Test public void testEquals() { PlayerDetails details1 = new PlayerDetails("tom@foo.bar", "11212-123434", "+12323425"); PlayerDetails details2 = new PlayerDetails("tom@foo.bar", "11212-123434", "+12323425"); assertEquals(details1, details2); PlayerDetails details3 = new PlayerDetails("john@foo.bar", "16412-123439", "+34323432"); assertFalse(details1.equals(details3)); } } java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/hexagonal/eventlog/000077500000000000000000000000001322244523500304655ustar00rootroot00000000000000MongoEventLogTest.java000066400000000000000000000067361322244523500346500ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/hexagonal/eventlog/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.eventlog; import com.iluwatar.hexagonal.domain.PlayerDetails; import com.iluwatar.hexagonal.mongo.MongoConnectionPropertiesLoader; import com.mongodb.MongoClient; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Disabled; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Tests for Mongo event log */ @Disabled public class MongoEventLogTest { private static final String TEST_DB = "lotteryDBTest"; private static final String TEST_EVENTS_COLLECTION = "testEvents"; private MongoEventLog mongoEventLog; @BeforeEach public void init() { MongoConnectionPropertiesLoader.load(); MongoClient mongoClient = new MongoClient(System.getProperty("mongo-host"), Integer.parseInt(System.getProperty("mongo-port"))); mongoClient.dropDatabase(TEST_DB); mongoClient.close(); mongoEventLog = new MongoEventLog(TEST_DB, TEST_EVENTS_COLLECTION); } @Test public void testSetup() { assertEquals(0, mongoEventLog.getEventsCollection().count()); } @Test public void testFundTransfers() { PlayerDetails playerDetails = new PlayerDetails("john@wayne.com", "000-000", "03432534543"); mongoEventLog.prizeError(playerDetails, 1000); assertEquals(1, mongoEventLog.getEventsCollection().count()); mongoEventLog.prizeError(playerDetails, 1000); assertEquals(2, mongoEventLog.getEventsCollection().count()); mongoEventLog.ticketDidNotWin(playerDetails); assertEquals(3, mongoEventLog.getEventsCollection().count()); mongoEventLog.ticketDidNotWin(playerDetails); assertEquals(4, mongoEventLog.getEventsCollection().count()); mongoEventLog.ticketSubmitError(playerDetails); assertEquals(5, mongoEventLog.getEventsCollection().count()); mongoEventLog.ticketSubmitError(playerDetails); assertEquals(6, mongoEventLog.getEventsCollection().count()); mongoEventLog.ticketSubmitted(playerDetails); assertEquals(7, mongoEventLog.getEventsCollection().count()); mongoEventLog.ticketSubmitted(playerDetails); assertEquals(8, mongoEventLog.getEventsCollection().count()); mongoEventLog.ticketWon(playerDetails, 1000); assertEquals(9, mongoEventLog.getEventsCollection().count()); mongoEventLog.ticketWon(playerDetails, 1000); assertEquals(10, mongoEventLog.getEventsCollection().count()); } } java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/hexagonal/test/000077500000000000000000000000001322244523500276215ustar00rootroot00000000000000LotteryTestUtils.java000066400000000000000000000041451322244523500337340ustar00rootroot00000000000000java-design-patterns-1.18.0/hexagonal/src/test/java/com/iluwatar/hexagonal/test/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.hexagonal.test; import java.util.Arrays; import java.util.HashSet; import java.util.Set; import com.iluwatar.hexagonal.domain.LotteryNumbers; import com.iluwatar.hexagonal.domain.LotteryTicket; import com.iluwatar.hexagonal.domain.LotteryTicketId; import com.iluwatar.hexagonal.domain.PlayerDetails; /** * * Utilities for lottery tests * */ public class LotteryTestUtils { /** * @return lottery ticket */ public static LotteryTicket createLotteryTicket() { return createLotteryTicket("foo@bar.com", "12231-213132", "+99324554", new HashSet<>(Arrays.asList(1, 2, 3, 4))); } /** * @return lottery ticket */ public static LotteryTicket createLotteryTicket(String email, String account, String phone, Set givenNumbers) { PlayerDetails details = new PlayerDetails(email, account, phone); LotteryNumbers numbers = LotteryNumbers.create(givenNumbers); return new LotteryTicket(new LotteryTicketId(), details, numbers); } } java-design-patterns-1.18.0/intercepting-filter/000077500000000000000000000000001322244523500216075ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/README.md000066400000000000000000000024211322244523500230650ustar00rootroot00000000000000--- layout: pattern title: Intercepting Filter folder: intercepting-filter permalink: /patterns/intercepting-filter/ categories: Behavioral tags: - Java - Difficulty-Intermediate --- ## Intent Provide pluggable filters to conduct necessary pre-processing and post-processing to requests from a client to a target ![alt text](./etc/intercepting-filter.png "Intercepting Filter") ## Applicability Use the Intercepting Filter pattern when * a system uses pre-processing or post-processing requests * a system should do the authentication/ authorization/ logging or tracking of request and then pass the requests to corresponding handlers * you want a modular approach to configuring pre-processing and post-processing schemes ## Real world examples * [javax.servlet.FilterChain](https://tomcat.apache.org/tomcat-8.0-doc/servletapi/javax/servlet/FilterChain.html) and [javax.servlet.Filter](https://tomcat.apache.org/tomcat-8.0-doc/servletapi/javax/servlet/Filter.html) * [Struts 2 - Interceptors](https://struts.apache.org/docs/interceptors.html) ## Credits * [TutorialsPoint - Intercepting Filter](http://www.tutorialspoint.com/design_pattern/intercepting_filter_pattern.htm) * [Presentation Tier Patterns](http://www.javagyan.com/tutorials/corej2eepatterns/presentation-tier-patterns) java-design-patterns-1.18.0/intercepting-filter/etc/000077500000000000000000000000001322244523500223625ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/etc/intercepting-filter.png000066400000000000000000002231271322244523500270550ustar00rootroot00000000000000PNG  IHDRbĢ&IDATxmWwaA چAVdn Q2{%CamZzyWbe#CM(ɝ%KY-YZ2k'EPH"]98M o7Xl~STSUQ^N5sz @5_@!М8_z^s=FB_hE'Ӓ fJR`9PE~ fJR`9PE~ fJR`9PE~ fJR`9PE~ f^j8s[sE~ #֢"3Q ?x LE~ #֢"fBAؠ|mV0(y? 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TL_ */%bon4K|L4^#kM8vRvvJkVq$\4=ã_" P7#y_bY>v^k6jU֗Ӭ5;:i/%:OB ,^nIZуh'h;_` _tã,;_@|g/8/Cf~6NiC7bP<Sv x՚4Z@L~q#vgm)^kٲogOZ> ٗ|svS\iwdiƠU0pΞ7qގ4 !,/ݶxn [C2sw@GIl5tn.K[v_li7=+G5n~F!cߝ,e,0niN*ؗTlw'0sHO7zK_@aNϼvg-uΊbrcO]9@&헻aoK ,W-+Kކ@ΕzG^$) 7V*O_|qߥ /bKOmJF*#H&Dw(~ѭC!"seupRS yF~a'/>r^9}ӏ|Z,_+-mvYH_mw_Rv%P 7窛;L:f / GX~!=7>ykμ,C6(N2E)ɽ3/2DB/g&pT\YfCS .S8_@vDB^yT7X6}wLxOtmr&.>PK*Z?C8WNݹR ob$N:#ϛvF~!DgYX}rK"ӡ:4UG_ N삱g9`_ */SB~) pJuMt\J~E!POIENDB`java-design-patterns-1.18.0/intercepting-filter/etc/intercepting-filter.ucls000066400000000000000000000323101322244523500272270ustar00rootroot00000000000000 java-design-patterns-1.18.0/intercepting-filter/pom.xml000066400000000000000000000043321322244523500231260ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 intercepting-filter org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.junit.jupiter junit-jupiter-params test org.mockito mockito-core test java-design-patterns-1.18.0/intercepting-filter/src/000077500000000000000000000000001322244523500223765ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/main/000077500000000000000000000000001322244523500233225ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/main/java/000077500000000000000000000000001322244523500242435ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/main/java/com/000077500000000000000000000000001322244523500250215ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500266515ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/000077500000000000000000000000001322244523500313445ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filter/000077500000000000000000000000001322244523500326315ustar00rootroot00000000000000AbstractFilter.java000066400000000000000000000035641322244523500363360ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.intercepting.filter; /** * Base class for order processing filters. Handles chain management. * */ public abstract class AbstractFilter implements Filter { private Filter next; public AbstractFilter() {} public AbstractFilter(Filter next) { this.next = next; } @Override public void setNext(Filter filter) { this.next = filter; } @Override public Filter getNext() { return next; } @Override public Filter getLast() { Filter last = this; while (last.getNext() != null) { last = last.getNext(); } return last; } @Override public String execute(Order order) { if (getNext() != null) { return getNext().execute(order); } else { return ""; } } } AddressFilter.java000066400000000000000000000031661322244523500361560ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.intercepting.filter; /** * Concrete implementation of filter This filter is responsible for checking/filtering the input in * the address field. * * @author joshzambales * */ public class AddressFilter extends AbstractFilter { @Override public String execute(Order order) { String result = super.execute(order); if (order.getAddress() == null || order.getAddress().isEmpty()) { return result + "Invalid address! "; } else { return result; } } } App.java000066400000000000000000000062111322244523500341350ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.intercepting.filter; /** * * When a request enters a Web application, it often must pass several entrance tests prior to the * main processing stage. For example, - Has the client been authenticated? - Does the client have a * valid session? - Is the client's IP address from a trusted network? - Does the request path * violate any constraints? - What encoding does the client use to send the data? - Do we support * the browser type of the client? Some of these checks are tests, resulting in a yes or no answer * that determines whether processing will continue. Other checks manipulate the incoming data * stream into a form suitable for processing. *

* The classic solution consists of a series of conditional checks, with any failed check aborting * the request. Nested if/else statements are a standard strategy, but this solution leads to code * fragility and a copy-and-paste style of programming, because the flow of the filtering and the * action of the filters is compiled into the application. *

* The key to solving this problem in a flexible and unobtrusive manner is to have a simple * mechanism for adding and removing processing components, in which each component completes a * specific filtering action. This is the Intercepting Filter pattern in action. *

* In this example we check whether the order request is valid through pre-processing done via * {@link Filter}. Each field has its own corresponding {@link Filter} *

* * @author joshzambales * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { FilterManager filterManager = new FilterManager(); filterManager.addFilter(new NameFilter()); filterManager.addFilter(new ContactFilter()); filterManager.addFilter(new AddressFilter()); filterManager.addFilter(new DepositFilter()); filterManager.addFilter(new OrderFilter()); Client client = new Client(); client.setFilterManager(filterManager); } } Client.java000066400000000000000000000075771322244523500346530ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.intercepting.filter; import java.awt.BorderLayout; import java.awt.GridLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JRootPane; import javax.swing.JTextArea; import javax.swing.JTextField; import javax.swing.SwingUtilities; /** * The Client class is responsible for handling the input and running them through filters inside the * {@link FilterManager}. * * This is where {@link Filter}s come to play as the client pre-processes the request before being displayed in the * {@link Target}. * * @author joshzambales * */ public class Client extends JFrame { // NOSONAR private static final long serialVersionUID = 1L; private transient FilterManager filterManager; private JLabel jl; private JTextField[] jtFields; private JTextArea[] jtAreas; private JButton clearButton; private JButton processButton; /** * Constructor */ public Client() { super("Client System"); setDefaultCloseOperation(EXIT_ON_CLOSE); setSize(300, 300); jl = new JLabel("RUNNING..."); jtFields = new JTextField[3]; for (int i = 0; i < 3; i++) { jtFields[i] = new JTextField(); } jtAreas = new JTextArea[2]; for (int i = 0; i < 2; i++) { jtAreas[i] = new JTextArea(); } clearButton = new JButton("Clear"); processButton = new JButton("Process"); setup(); } private void setup() { setLayout(new BorderLayout()); JPanel panel = new JPanel(); add(jl, BorderLayout.SOUTH); add(panel, BorderLayout.CENTER); panel.setLayout(new GridLayout(6, 2)); panel.add(new JLabel("Name")); panel.add(jtFields[0]); panel.add(new JLabel("Contact Number")); panel.add(jtFields[1]); panel.add(new JLabel("Address")); panel.add(jtAreas[0]); panel.add(new JLabel("Deposit Number")); panel.add(jtFields[2]); panel.add(new JLabel("Order")); panel.add(jtAreas[1]); panel.add(clearButton); panel.add(processButton); clearButton.addActionListener(e -> { for (JTextArea i : jtAreas) { i.setText(""); } for (JTextField i : jtFields) { i.setText(""); } }); processButton.addActionListener(e -> { Order order = new Order(jtFields[0].getText(), jtFields[1].getText(), jtAreas[0].getText(), jtFields[2].getText(), jtAreas[1].getText()); jl.setText(sendRequest(order)); }); JRootPane rootPane = SwingUtilities.getRootPane(processButton); rootPane.setDefaultButton(processButton); setVisible(true); } public void setFilterManager(FilterManager filterManager) { this.filterManager = filterManager; } public String sendRequest(Order order) { return filterManager.filterRequest(order); } } ContactFilter.java000066400000000000000000000035161322244523500361630ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.intercepting.filter; /** * Concrete implementation of filter This filter checks for the contact field in which it checks if * the input consist of numbers and it also checks if the input follows the length constraint (11 * digits) * * @author joshzambales * */ public class ContactFilter extends AbstractFilter { @Override public String execute(Order order) { String result = super.execute(order); if (order.getContactNumber() == null || order.getContactNumber().isEmpty() || order.getContactNumber().matches(".*[^\\d]+.*") || order.getContactNumber().length() != 11) { return result + "Invalid contact number! "; } else { return result; } } } DepositFilter.java000066400000000000000000000031251322244523500361730ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.intercepting.filter; /** * Concrete implementation of filter This checks for the deposit code * * @author joshzambales * */ public class DepositFilter extends AbstractFilter { @Override public String execute(Order order) { String result = super.execute(order); if (order.getDepositNumber() == null || order.getDepositNumber().isEmpty()) { return result + "Invalid deposit number! "; } else { return result; } } } Filter.java000066400000000000000000000033371322244523500346500ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.intercepting.filter; /** * Filters perform certain tasks prior or after execution of request by request handler. In this * case, before the request is handled by the target, the request undergoes through each Filter * * @author joshzambales * */ public interface Filter { /** * Execute order processing filter. */ String execute(Order order); /** * Set next filter in chain after this. */ void setNext(Filter filter); /** * Get next filter in chain after this. */ Filter getNext(); /** * Get last filter in the chain. */ Filter getLast(); } FilterChain.java000066400000000000000000000033161322244523500356100ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.intercepting.filter; /** * Filter Chain carries multiple filters and help to execute them in defined order on target. * * @author joshzambales */ public class FilterChain { private Filter chain; /** * Adds filter */ public void addFilter(Filter filter) { if (chain == null) { chain = filter; } else { chain.getLast().setNext(filter); } } /** * Execute filter chain */ public String execute(Order order) { if (chain != null) { return chain.execute(order); } else { return "RUNNING..."; } } } FilterManager.java000066400000000000000000000030741322244523500361410ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.intercepting.filter; /** * Filter Manager manages the filters and {@link FilterChain}. * * @author joshzambales * */ public class FilterManager { private FilterChain filterChain; public FilterManager() { filterChain = new FilterChain(); } public void addFilter(Filter filter) { filterChain.addFilter(filter); } public String filterRequest(Order order) { return filterChain.execute(order); } } NameFilter.java000066400000000000000000000032321322244523500354430ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.intercepting.filter; /** * Concrete implementation of filter. This filter checks if the input in the Name field is valid. * (alphanumeric) * * @author joshzambales * */ public class NameFilter extends AbstractFilter { @Override public String execute(Order order) { String result = super.execute(order); if (order.getName() == null || order.getName().isEmpty() || order.getName().matches(".*[^\\w|\\s]+.*")) { return result + "Invalid name! "; } else { return result; } } } Order.java000066400000000000000000000046061322244523500344760ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.intercepting.filter; /** * Order class carries the order data. * */ public class Order { private String name; private String contactNumber; private String address; private String depositNumber; private String orderItem; public Order() {} /** * Constructor */ public Order(String name, String contactNumber, String address, String depositNumber, String order) { this.name = name; this.contactNumber = contactNumber; this.address = address; this.depositNumber = depositNumber; this.orderItem = order; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getContactNumber() { return contactNumber; } public void setContactNumber(String contactNumber) { this.contactNumber = contactNumber; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public String getDepositNumber() { return depositNumber; } public void setDepositNumber(String depositNumber) { this.depositNumber = depositNumber; } public String getOrderItem() { return orderItem; } public void setOrderItem(String order) { this.orderItem = order; } } OrderFilter.java000066400000000000000000000031031322244523500356330ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.intercepting.filter; /** * Concrete implementation of filter. This checks for the order field. * * @author joshzambales * */ public class OrderFilter extends AbstractFilter { @Override public String execute(Order order) { String result = super.execute(order); if (order.getOrderItem() == null || order.getOrderItem().isEmpty()) { return result + "Invalid order! "; } else { return result; } } } Target.java000066400000000000000000000062621322244523500346510ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.intercepting.filter; import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JRootPane; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.SwingUtilities; import javax.swing.table.DefaultTableModel; /** * This is where the requests are displayed after being validated by filters. * * @author mjoshzambales * */ public class Target extends JFrame { //NOSONAR private static final long serialVersionUID = 1L; private JTable jt; private JScrollPane jsp; private DefaultTableModel dtm; private JButton del; /** * Constructor */ public Target() { super("Order System"); setDefaultCloseOperation(EXIT_ON_CLOSE); setSize(640, 480); dtm = new DefaultTableModel(new Object[] {"Name", "Contact Number", "Address", "Deposit Number", "Order"}, 0); jt = new JTable(dtm); del = new JButton("Delete"); setup(); } private void setup() { setLayout(new BorderLayout()); JPanel bot = new JPanel(); add(jt.getTableHeader(), BorderLayout.NORTH); bot.setLayout(new BorderLayout()); bot.add(del, BorderLayout.EAST); add(bot, BorderLayout.SOUTH); jsp = new JScrollPane(jt); jsp.setPreferredSize(new Dimension(500, 250)); add(jsp, BorderLayout.CENTER); del.addActionListener(new DListener()); JRootPane rootPane = SwingUtilities.getRootPane(del); rootPane.setDefaultButton(del); setVisible(true); } public void execute(String[] request) { dtm.addRow(new Object[] {request[0], request[1], request[2], request[3], request[4]}); } class DListener implements ActionListener { @Override public void actionPerformed(ActionEvent e) { int temp = jt.getSelectedRow(); if (temp == -1) { return; } int temp2 = jt.getSelectedRowCount(); for (int i = 0; i < temp2; i++) { dtm.removeRow(temp); } } } } java-design-patterns-1.18.0/intercepting-filter/src/test/000077500000000000000000000000001322244523500233555ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/test/java/000077500000000000000000000000001322244523500242765ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/test/java/com/000077500000000000000000000000001322244523500250545ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500267045ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/test/java/com/iluwatar/intercepting/000077500000000000000000000000001322244523500313775ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/test/java/com/iluwatar/intercepting/filter/000077500000000000000000000000001322244523500326645ustar00rootroot00000000000000AppTest.java000066400000000000000000000025251322244523500350340ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/test/java/com/iluwatar/intercepting/filter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.intercepting.filter; import org.junit.jupiter.api.Test; /** * * Application test. * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } FilterManagerTest.java000066400000000000000000000047201322244523500370330ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/test/java/com/iluwatar/intercepting/filter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.intercepting.filter; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.mockito.Matchers.any; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyZeroInteractions; import static org.mockito.Mockito.when; /** * Date: 12/13/15 - 3:01 PM * * @author Jeroen Meulemeester */ public class FilterManagerTest { @Test public void testFilterRequest() throws Exception { final Target target = mock(Target.class); final FilterManager filterManager = new FilterManager(); assertEquals("RUNNING...", filterManager.filterRequest(mock(Order.class))); verifyZeroInteractions(target); } @Test public void testAddFilter() throws Exception { final Target target = mock(Target.class); final FilterManager filterManager = new FilterManager(); verifyZeroInteractions(target); final Filter filter = mock(Filter.class); when(filter.execute(any(Order.class))).thenReturn("filter"); filterManager.addFilter(filter); final Order order = mock(Order.class); assertEquals("filter", filterManager.filterRequest(order)); verify(filter, times(1)).execute(any(Order.class)); verifyZeroInteractions(target, filter, order); } }FilterTest.java000066400000000000000000000117071322244523500355430ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/test/java/com/iluwatar/intercepting/filter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.intercepting.filter; import org.junit.jupiter.params.ParameterizedTest; import org.junit.jupiter.params.provider.MethodSource; import java.util.ArrayList; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertNull; import static org.junit.jupiter.api.Assertions.assertSame; /** * Date: 12/13/15 - 2:17 PM * * @author Jeroen Meulemeester */ public class FilterTest { private static final Order PERFECT_ORDER = new Order("name", "12345678901", "addr", "dep", "order"); private static final Order WRONG_ORDER = new Order("name", "12345678901", "addr", "dep", ""); private static final Order WRONG_DEPOSIT = new Order("name", "12345678901", "addr", "", "order"); private static final Order WRONG_ADDRESS = new Order("name", "12345678901", "", "dep", "order"); private static final Order WRONG_CONTACT = new Order("name", "", "addr", "dep", "order"); private static final Order WRONG_NAME = new Order("", "12345678901", "addr", "dep", "order"); static List getTestData() { final List testData = new ArrayList<>(); testData.add(new Object[]{new NameFilter(), PERFECT_ORDER, ""}); testData.add(new Object[]{new NameFilter(), WRONG_NAME, "Invalid name!"}); testData.add(new Object[]{new NameFilter(), WRONG_CONTACT, ""}); testData.add(new Object[]{new NameFilter(), WRONG_ADDRESS, ""}); testData.add(new Object[]{new NameFilter(), WRONG_DEPOSIT, ""}); testData.add(new Object[]{new NameFilter(), WRONG_ORDER, ""}); testData.add(new Object[]{new ContactFilter(), PERFECT_ORDER, ""}); testData.add(new Object[]{new ContactFilter(), WRONG_NAME, ""}); testData.add(new Object[]{new ContactFilter(), WRONG_CONTACT, "Invalid contact number!"}); testData.add(new Object[]{new ContactFilter(), WRONG_ADDRESS, ""}); testData.add(new Object[]{new ContactFilter(), WRONG_DEPOSIT, ""}); testData.add(new Object[]{new ContactFilter(), WRONG_ORDER, ""}); testData.add(new Object[]{new AddressFilter(), PERFECT_ORDER, ""}); testData.add(new Object[]{new AddressFilter(), WRONG_NAME, ""}); testData.add(new Object[]{new AddressFilter(), WRONG_CONTACT, ""}); testData.add(new Object[]{new AddressFilter(), WRONG_ADDRESS, "Invalid address!"}); testData.add(new Object[]{new AddressFilter(), WRONG_DEPOSIT, ""}); testData.add(new Object[]{new AddressFilter(), WRONG_ORDER, ""}); testData.add(new Object[]{new DepositFilter(), PERFECT_ORDER, ""}); testData.add(new Object[]{new DepositFilter(), WRONG_NAME, ""}); testData.add(new Object[]{new DepositFilter(), WRONG_CONTACT, ""}); testData.add(new Object[]{new DepositFilter(), WRONG_ADDRESS, ""}); testData.add(new Object[]{new DepositFilter(), WRONG_DEPOSIT, "Invalid deposit number!"}); testData.add(new Object[]{new DepositFilter(), WRONG_ORDER, ""}); testData.add(new Object[]{new OrderFilter(), PERFECT_ORDER, ""}); testData.add(new Object[]{new OrderFilter(), WRONG_NAME, ""}); testData.add(new Object[]{new OrderFilter(), WRONG_CONTACT, ""}); testData.add(new Object[]{new OrderFilter(), WRONG_ADDRESS, ""}); testData.add(new Object[]{new OrderFilter(), WRONG_DEPOSIT, ""}); testData.add(new Object[]{new OrderFilter(), WRONG_ORDER, "Invalid order!"}); return testData; } @ParameterizedTest @MethodSource("getTestData") public void testExecute(Filter filter, Order order, String expectedResult) throws Exception { final String result = filter.execute(order); assertNotNull(result); assertEquals(expectedResult, result.trim()); } @ParameterizedTest @MethodSource("getTestData") public void testNext(Filter filter) throws Exception { assertNull(filter.getNext()); assertSame(filter, filter.getLast()); } } OrderTest.java000066400000000000000000000045751322244523500353760ustar00rootroot00000000000000java-design-patterns-1.18.0/intercepting-filter/src/test/java/com/iluwatar/intercepting/filter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.intercepting.filter; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Date: 12/13/15 - 2:57 PM * * @author Jeroen Meulemeester */ public class OrderTest { private static final String EXPECTED_VALUE = "test"; @Test public void testSetName() throws Exception { final Order order = new Order(); order.setName(EXPECTED_VALUE); assertEquals(EXPECTED_VALUE, order.getName()); } @Test public void testSetContactNumber() throws Exception { final Order order = new Order(); order.setContactNumber(EXPECTED_VALUE); assertEquals(EXPECTED_VALUE, order.getContactNumber()); } @Test public void testSetAddress() throws Exception { final Order order = new Order(); order.setAddress(EXPECTED_VALUE); assertEquals(EXPECTED_VALUE, order.getAddress()); } @Test public void testSetDepositNumber() throws Exception { final Order order = new Order(); order.setDepositNumber(EXPECTED_VALUE); assertEquals(EXPECTED_VALUE, order.getDepositNumber()); } @Test public void testSetOrder() throws Exception { final Order order = new Order(); order.setOrderItem(EXPECTED_VALUE); assertEquals(EXPECTED_VALUE, order.getOrderItem()); } } java-design-patterns-1.18.0/interpreter/000077500000000000000000000000001322244523500201745ustar00rootroot00000000000000java-design-patterns-1.18.0/interpreter/README.md000066400000000000000000000034501322244523500214550ustar00rootroot00000000000000--- layout: pattern title: Interpreter folder: interpreter permalink: /patterns/interpreter/ categories: Behavioral tags: - Java - Gang Of Four - Difficulty-Intermediate --- ## Intent Given a language, define a representation for its grammar along with an interpreter that uses the representation to interpret sentences in the language. ![alt text](./etc/interpreter_1.png "Interpreter") ## Applicability Use the Interpreter pattern when there is a language to interpret, and you can represent statements in the language as abstract syntax trees. The Interpreter pattern works best when * the grammar is simple. For complex grammars, the class hierarchy for the grammar becomes large and unmanageable. Tools such as parser generators are a better alternative in such cases. They can interpret expressions without building abstract syntax trees, which can save space and possibly time * efficiency is not a critical concern. The most efficient interpreters are usually not implemented by interpreting parse trees directly but by first translating them into another form. For example, regular expressions are often transformed into state machines. But even then, the translator can be implemented by the Interpreter pattern, so the pattern is still applicable ## Real world examples * [java.util.Pattern](http://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html) * [java.text.Normalizer](http://docs.oracle.com/javase/8/docs/api/java/text/Normalizer.html) * All subclasses of [java.text.Format](http://docs.oracle.com/javase/8/docs/api/java/text/Format.html) * [javax.el.ELResolver](http://docs.oracle.com/javaee/7/api/javax/el/ELResolver.html) ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.18.0/interpreter/etc/000077500000000000000000000000001322244523500207475ustar00rootroot00000000000000java-design-patterns-1.18.0/interpreter/etc/interpreter.png000066400000000000000000000646471322244523500240410ustar00rootroot00000000000000PNG  IHDR{/inIDATxop$W};HrR+W܇QL£'#086 C ^ǔ-6hױ)5I=yVck]f=Uv:&P KQEmț}OtL}>-ӧKjeg'q H&@%`8卭WBZR&BEDD(n!TE('Bu *ED8-[UQD.B% ljPnqB"r*Q8΢9_MOӣl5"TjP8V%5U \kֽh!T׭ADVC ǙQVm2//7jǛHB>}=eU("T]8ζ k)Y֫%غRCۋ62(RɤvQm/[FP%Tۈ-I&iL[P ]lI,yXT;9̺oN-)mGn"ڕrn%Bz6뷗p Jlo[ -qI56BEHa+ieR oGq2Hjͬ뷋p,<85b}K>FM-cs>n"hԮT欽n%Bz6뷗j8vP^&˭xL6˴ݎiM]IeUBܒDlp>.(VJYl5`;mI( ۏu65~ +d_\ E*bs Yk~ԛJI\&)qk>׭ P"r98+[UQD.B% ljPnqB"r*Q8NrBUPq"[\\J⺅PE"Tp-("D(n!TEw~_G?YeMB׭E`-P0ʫw{Ta#Y >eٰ3ai)z1]U0Ok3P qREfRjbv32"rREG]FBbd)E|d|ʿ~O>y{w:ʅ-J[3qF=E˪Ue[pBtsI%*u~FpR$//r748װFc\)V7.l]X%qX}L5\/S mL۽rp,:%k8NB2Xg?gOsD/p_~7)?xAy֧w/lTpANm4 Ze7~j0TgwM&"#nԫ)t[Υ:fsw身Uܪ֛k[4_Quc>0_ǩZ3~PYb()Cj'x+#"{ xt@%́ =GAu-|_{op~LG}N'lm_KK':0mA~$wfu(!T[R6u0lU[5[jMiwJ6 XRFv! ڠ:+0^þ.?p{G"YbW#bc^x@qϽi9.Um"ݠ>ըSoܗU0s H\ɭz.n¼`!U[5[je,ҪΚPRJSV ^#Ev!'A=GAurŏrQ.7^8!z굓Ϝ}n,MR Km8-Ւ5kZ}ͨFg )WYrwLqTWL %5g@""{ a)8B qWy.w~?[i?.;o\ J-(7[Vh"{/KUP `_C ٝ ~ ׭"T%"DMf>ӟ5>%{5T疲9SˍlMNLb+i:}՟$]{M}Qբ;rޚo6Sl(5yw>gtwr__nR*+݉$6Rm{8Nz%/XV:%5XޙBŚم3Uo-P_kg)4^kD9@/5;iRȑVD=ۅMb[mǩ~f\7gH3aiYeHM65WwDVӧfWF7#A׭^P%T{)"sf6ӽ_QDZz*n+Ck>AJ~b$X&K)MuW"T ^\&ٵjqrs|ݿ-so^ %wZ&JYJ m4qUB"r;Ilv80Jlcw7Ji: %Vå3ݴlWj6~İ~6)Kug"T B&٭|Un7.%TR6AjRh񂾥&o_)#m4]k9Yd*/0{&[JJDnw"6ͮT6(vRu $B+g"6 lj^%T*IjW"rQDl⺅PE"Tp-("D(n!TE('Bu *ED[kH,b+\Q:N2FM BPѪP^qB"r*Q8NrBUPq"[\\Jq T"D9Pnը)A"r*Q5Z+[UQD.B% ljPnqB"r*Q;έ];KW~<AnD"Tu{^K?}RJ?J\M""r*Q8N%?$z ]M|85 ~r᯴6ۑE("7:Ʋ^f.lnˆ-"UonvT'Ez8Vu+zRlM͢~WS$B!i5S[ĦSfMk1r?c:;t @%:{׏G/ʴ,l8WӹPw,{fp Xnl~3VObǩk1r?Zӹuܮ4Z0{781YJL)ߗ gߋį[ϩ5֔uٺښin$.!:lz8V>uia Wbw6?Ax:Y6:٣.lLb3-'|Kw֔맗P6\g#7YَqᑽϜ}qy)+uߗR Lhˢu)aͿɂRFC?ībiݫn׉ w WۃDNӤ3}hfU/D3E.=m:}ˇ]KY m_b>:1lbOV톾E{]GvG/43`ΖP[ǦKv.'f r?\: @mw;{ӳֽW^Y_J{o˛=ø6ݎOUcNOKWǥn9#l*s8Uns2l`Fn\\:pew|p}G^\8rjYؽ2-+/Nc:NRS=&2&/!?Z/>\ M SS]Ul΀FnL\:p2֕:]?~#?( 2ז햣m MPkT7pt\;ZNORwæ"5l*t8 VLl&F_ ;N"e5p6rYٖHw?YH '[M{o [ i]MCqζ^Zly:1?᤿\PQnkpB=¦z苘KXv?\hk r&ť'WJz]6GHk zz*C~ "!r?1hd@g)Zntx16p6SۚNg.p [L @9*+ =NelOJVm馂Ȳa5p܁mNxljP1⺅PE"Tp-("D(n!TE('Bu *ED8-[UQD.B%g/wDdL2 WU[ubSDnQ"rQ{g ics?DA1U.b ܂vANԉw3,ec#ȮaT5{"6Jۡ\Tr;~Ͼ~y&s1O奬 m*j^_8xV5sd+j U@vjWOϑa,x"6j+"E%*|C~ay)+Cw'iE' ewvfm~܄ualx"6j+"E%*[}RV6KJXɎ<9Erb.6R3-[&BmEDs|p}G^\8rjYؽ2-+C勍XK n,s Խ nKqiu㷯>r /۴/j}}Y{SVkIƏoIdukD\"܎St9qmnnQulT0-.."~T] #dukD(U܋/D.qQad죈MT=-rϝ;Tw111B"4 Il*{…ՙu"!_q*3r+DUT/"ٳv\YY rpljq"TENuܙ3g\҅D(pUQ]FJ1b1'N?E(p*O)R]v-..={E8-'BUT]__^]]pP7q"[8NXYYرcG^_ZZ:EHXr;+O> qh`܋/:ՙ###333kkkM:Vgj.˂K^g+'hTUIl-?r';ՙ "uNǜdAARLH%2ü} 08Mtw%|NfQnytok=Zvajl9l}y~SNРLIl(gZ\sϞ'=%rQU8g>鸼B1 ?H~(+}څL 0Dz1H0˦]XJh9)7F@Ilׅ /džslss7ZV"r\T97=P?tj2YTlwW*2YoP {30zcT n&:symv]64kO8pD.JT>ǹί<=l+奬 mPYI/gIq-[=ĺ.[&=%RKq5qLژ%rQ8o;pS {eZV6k{7O QG%RFrRo -bV[97wػszcqKm?EDskw]+z,6jŸljݳXU nb[Jd=NcT nmkccme徉;vƮ]-.ySR r\Tr;N> $@j"6QV;,-:ՙ.Y5'k4[D.*F8պ"4Pؘ͢sLŋ][;:3s;FG{vvLJq/^\YY!r qz; K $a\KFFFz/!6 *Wg>4[ڱ7&&vܷns{Y羔-<'rljP?n9::z hyBvvǢ7j&''^tii{C"D([Ν;|/d& 'Skqݦsʝ={VWW\T8ʭօ wQPNHwimJ?[)B1۹?RkpqHԋ˔__N.()4ö OWva_il6FKY!Kt}Nɩ_I]F$W%\:N]cg|@U kg_hSo\)8Mq 1UR{gN=dIN84l8tl:*Uv7uDS֔?9>qͶܖo{;{A p]i6J1oIP]:+64ww׽tMW6wԂ ,^)|e-_ 44wmH1_xҖϒPE8lW''9'Nc"4ʧϦsqKx6kM;,{ڈmج/w6OvcZbGv#ͦerU^ ޺M^vtSMh+h۷^_w V.ҕn"߆iYy7|\mʻVk35ͭ>>C@$zEr9quFu=8`r`;u@٧NEEBSj}ӡ-s;JϺɖ?wgGcYAk]7~EcxSE͐Cy}rۖh-slOr㧣Me&-Cܔq*9ѧ)Ethh(CTm2{666fff5{|զ0'BMVo*;HoxQ69dv}}/kCYֿru,fuTV. 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.interpreter; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.Stack; /** * * The Interpreter pattern is a design pattern that specifies how to evaluate sentences in a * language. The basic idea is to have a class for each symbol (terminal or nonterminal) in a * specialized computer language. The syntax tree of a sentence in the language is an instance of * the composite pattern and is used to evaluate (interpret) the sentence for a client. *

* In this example we use the Interpreter pattern to break sentences into expressions ( * {@link Expression}) that can be evaluated and as a whole form the result. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * * Program entry point. *

* Expressions can be evaluated using prefix, infix or postfix notations This sample uses postfix, * where operator comes after the operands * * @param args command line args * */ public static void main(String[] args) { String tokenString = "4 3 2 - 1 + *"; Stack stack = new Stack<>(); String[] tokenList = tokenString.split(" "); for (String s : tokenList) { if (isOperator(s)) { Expression rightExpression = stack.pop(); Expression leftExpression = stack.pop(); LOGGER.info("popped from stack left: {} right: {}", leftExpression.interpret(), rightExpression.interpret()); Expression operator = getOperatorInstance(s, leftExpression, rightExpression); LOGGER.info("operator: {}", operator); int result = operator.interpret(); NumberExpression resultExpression = new NumberExpression(result); stack.push(resultExpression); LOGGER.info("push result to stack: {}", resultExpression.interpret()); } else { Expression i = new NumberExpression(s); stack.push(i); LOGGER.info("push to stack: {}", i.interpret()); } } LOGGER.info("result: {}", stack.pop().interpret()); } public static boolean isOperator(String s) { return s.equals("+") || s.equals("-") || s.equals("*"); } /** * Get expression for string */ public static Expression getOperatorInstance(String s, Expression left, Expression right) { switch (s) { case "+": return new PlusExpression(left, right); case "-": return new MinusExpression(left, right); case "*": return new MultiplyExpression(left, right); default: return new MultiplyExpression(left, right); } } } java-design-patterns-1.18.0/interpreter/src/main/java/com/iluwatar/interpreter/Expression.java000066400000000000000000000024641322244523500326110ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.interpreter; /** * * Expression * */ public abstract class Expression { public abstract int interpret(); @Override public abstract String toString(); } java-design-patterns-1.18.0/interpreter/src/main/java/com/iluwatar/interpreter/MinusExpression.java000066400000000000000000000032331322244523500336200ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.interpreter; /** * * MinusExpression * */ public class MinusExpression extends Expression { private Expression leftExpression; private Expression rightExpression; public MinusExpression(Expression leftExpression, Expression rightExpression) { this.leftExpression = leftExpression; this.rightExpression = rightExpression; } @Override public int interpret() { return leftExpression.interpret() - rightExpression.interpret(); } @Override public String toString() { return "-"; } } MultiplyExpression.java000066400000000000000000000032441322244523500342670ustar00rootroot00000000000000java-design-patterns-1.18.0/interpreter/src/main/java/com/iluwatar/interpreter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.interpreter; /** * * MultiplyExpression * */ public class MultiplyExpression extends Expression { private Expression leftExpression; private Expression rightExpression; public MultiplyExpression(Expression leftExpression, Expression rightExpression) { this.leftExpression = leftExpression; this.rightExpression = rightExpression; } @Override public int interpret() { return leftExpression.interpret() * rightExpression.interpret(); } @Override public String toString() { return "*"; } } java-design-patterns-1.18.0/interpreter/src/main/java/com/iluwatar/interpreter/NumberExpression.java000066400000000000000000000030461322244523500337570ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.interpreter; /** * * NumberExpression * */ public class NumberExpression extends Expression { private int number; public NumberExpression(int number) { this.number = number; } public NumberExpression(String s) { this.number = Integer.parseInt(s); } @Override public int interpret() { return number; } @Override public String toString() { return "number"; } } java-design-patterns-1.18.0/interpreter/src/main/java/com/iluwatar/interpreter/PlusExpression.java000066400000000000000000000032271322244523500334530ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.interpreter; /** * * PlusExpression * */ public class PlusExpression extends Expression { private Expression leftExpression; private Expression rightExpression; public PlusExpression(Expression leftExpression, Expression rightExpression) { this.leftExpression = leftExpression; this.rightExpression = rightExpression; } @Override public int interpret() { return leftExpression.interpret() + rightExpression.interpret(); } @Override public String toString() { return "+"; } } java-design-patterns-1.18.0/interpreter/src/test/000077500000000000000000000000001322244523500217425ustar00rootroot00000000000000java-design-patterns-1.18.0/interpreter/src/test/java/000077500000000000000000000000001322244523500226635ustar00rootroot00000000000000java-design-patterns-1.18.0/interpreter/src/test/java/com/000077500000000000000000000000001322244523500234415ustar00rootroot00000000000000java-design-patterns-1.18.0/interpreter/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500252715ustar00rootroot00000000000000java-design-patterns-1.18.0/interpreter/src/test/java/com/iluwatar/interpreter/000077500000000000000000000000001322244523500276345ustar00rootroot00000000000000java-design-patterns-1.18.0/interpreter/src/test/java/com/iluwatar/interpreter/AppTest.java000066400000000000000000000025141322244523500320610ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.interpreter; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/interpreter/src/test/java/com/iluwatar/interpreter/ExpressionTest.java000066400000000000000000000077301322244523500335050ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.interpreter; import org.junit.jupiter.api.Disabled; import org.junit.jupiter.params.ParameterizedTest; import org.junit.jupiter.params.provider.Arguments; import org.junit.jupiter.params.provider.MethodSource; import java.util.ArrayList; import java.util.List; import java.util.function.BiFunction; import java.util.function.IntBinaryOperator; import java.util.stream.Stream; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; /** * Date: 12/14/15 - 11:48 AM * * Test Case for Expressions * @param Type of Expression * @author Jeroen Meulemeester */ public abstract class ExpressionTest { /** * Generate inputs ranging from -10 to 10 for both input params and calculate the expected result * * @param resultCalc The function used to calculate the expected result * @return A stream with test entries */ static Stream prepareParameters(final IntBinaryOperator resultCalc) { final List testData = new ArrayList<>(); for (int i = -10; i < 10; i++) { for (int j = -10; j < 10; j++) { testData.add(Arguments.of( new NumberExpression(i), new NumberExpression(j), resultCalc.applyAsInt(i, j) )); } } return testData.stream(); } /** * The expected {@link E#toString()} response */ private final String expectedToString; /** * Factory, used to create a new test object instance with the correct first and second parameter */ private final BiFunction factory; /** * Create a new test instance with the given parameters and expected results * * @param expectedToString The expected {@link E#toString()} response * @param factory Factory, used to create a new test object instance */ ExpressionTest(final String expectedToString, final BiFunction factory ) { this.expectedToString = expectedToString; this.factory = factory; } /** * Verify if the expression calculates the correct result when calling {@link E#interpret()} */ @ParameterizedTest @MethodSource("expressionProvider") public void testInterpret(NumberExpression first, NumberExpression second, int result) { final E expression = factory.apply(first, second); assertNotNull(expression); assertEquals(result, expression.interpret()); } /** * Verify if the expression has the expected {@link E#toString()} value */ @ParameterizedTest @MethodSource("expressionProvider") public void testToString(NumberExpression first, NumberExpression second) { final E expression = factory.apply(first, second); assertNotNull(expression); assertEquals(expectedToString, expression.toString()); } } MinusExpressionTest.java000066400000000000000000000034511322244523500344360ustar00rootroot00000000000000java-design-patterns-1.18.0/interpreter/src/test/java/com/iluwatar/interpreter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.interpreter; import org.junit.jupiter.params.provider.Arguments; import java.util.stream.Stream; /** * Date: 12/14/15 - 12:08 PM * * @author Jeroen Meulemeester */ public class MinusExpressionTest extends ExpressionTest { /** * Create a new set of test entries with the expected result * * @return The list of parameters used during this test */ public static Stream expressionProvider() { return prepareParameters((f, s) -> f - s); } /** * Create a new test instance using the given test parameters and expected result */ public MinusExpressionTest() { super("-", MinusExpression::new); } }MultiplyExpressionTest.java000066400000000000000000000034721322244523500351650ustar00rootroot00000000000000java-design-patterns-1.18.0/interpreter/src/test/java/com/iluwatar/interpreter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.interpreter; import org.junit.jupiter.params.provider.Arguments; import java.util.stream.Stream; /** * Date: 12/14/15 - 12:08 PM * * @author Jeroen Meulemeester */ public class MultiplyExpressionTest extends ExpressionTest { /** * Create a new set of test entries with the expected result * * @return The list of parameters used during this test */ public static Stream expressionProvider() { return prepareParameters((f, s) -> f * s); } /** * Create a new test instance using the given test parameters and expected result * */ public MultiplyExpressionTest() { super("*", MultiplyExpression::new); } }NumberExpressionTest.java000066400000000000000000000047121322244523500345740ustar00rootroot00000000000000java-design-patterns-1.18.0/interpreter/src/test/java/com/iluwatar/interpreter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.interpreter; import org.junit.jupiter.params.ParameterizedTest; import org.junit.jupiter.params.provider.Arguments; import org.junit.jupiter.params.provider.MethodSource; import java.util.stream.Stream; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Date: 12/14/15 - 12:08 PM * * @author Jeroen Meulemeester */ public class NumberExpressionTest extends ExpressionTest { /** * Create a new set of test entries with the expected result * * @return The list of parameters used during this test */ public static Stream expressionProvider() { return prepareParameters((f, s) -> f); } /** * Create a new test instance using the given test parameters and expected result */ public NumberExpressionTest() { super("number", (f, s) -> f); } /** * Verify if the {@link NumberExpression#NumberExpression(String)} constructor works as expected */ @ParameterizedTest @MethodSource("expressionProvider") public void testFromString(NumberExpression first) throws Exception { final int expectedValue = first.interpret(); final String testStringValue = String.valueOf(expectedValue); final NumberExpression numberExpression = new NumberExpression(testStringValue); assertEquals(expectedValue, numberExpression.interpret()); } }PlusExpressionTest.java000066400000000000000000000034451322244523500342710ustar00rootroot00000000000000java-design-patterns-1.18.0/interpreter/src/test/java/com/iluwatar/interpreter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.interpreter; import org.junit.jupiter.params.provider.Arguments; import java.util.stream.Stream; /** * Date: 12/14/15 - 12:08 PM * * @author Jeroen Meulemeester */ public class PlusExpressionTest extends ExpressionTest { /** * Create a new set of test entries with the expected result * * @return The list of parameters used during this test */ public static Stream expressionProvider() { return prepareParameters((f, s) -> f + s); } /** * Create a new test instance using the given test parameters and expected result */ public PlusExpressionTest() { super("+", PlusExpression::new); } }java-design-patterns-1.18.0/iterator/000077500000000000000000000000001322244523500174625ustar00rootroot00000000000000java-design-patterns-1.18.0/iterator/README.md000066400000000000000000000017601322244523500207450ustar00rootroot00000000000000--- layout: pattern title: Iterator folder: iterator permalink: /patterns/iterator/ categories: Behavioral tags: - Java - Difficulty-Beginner - Gang Of Four --- ## Also known as Cursor ## Intent Provide a way to access the elements of an aggregate object sequentially without exposing its underlying representation. ![alt text](./etc/iterator_1.png "Iterator") ## Applicability Use the Iterator pattern * to access an aggregate object's contents without exposing its internal representation * to support multiple traversals of aggregate objects * to provide a uniform interface for traversing different aggregate structures ## Real world examples * [java.util.Iterator](http://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html) * [java.util.Enumeration](http://docs.oracle.com/javase/8/docs/api/java/util/Enumeration.html) ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.18.0/iterator/etc/000077500000000000000000000000001322244523500202355ustar00rootroot00000000000000java-design-patterns-1.18.0/iterator/etc/iterator.png000066400000000000000000000631641322244523500226060ustar00rootroot00000000000000PNG  IHDR4^f;IDATx$W}YqGVD11Yꬬ*_O]$ 9%ξ9%s s{ANaz 'Dr ANaz 'Dr ANr0̀j" 4ڝ1XD]BS1BoPbyXuoշ!!VD3BS1CA3p\L'$6PrTIaԆ r ANĨkVGY7 *A:+/[O~5"UbkˆuЃ=W,RǦ%˩v&^M4Z%J,SHf1[dmz*3 W;Zo䕢>:~#oW{v.8qɅw]z^S#:i#fh&%Q,R,?u$qV+acdb.k( GEҼg4 Xr:zM']te 'ԁߴr)]H8iy{h[*-;rRmXEK)p|B2ä!@z; cM5eg޷>|Á?k.[]GTONaLnt9ɿ˜sJWlV'lZNCc42 r0rzōWxێ]G~<ϖZ/Suϥ+EQd\j;֓,+]vqS9WSS]~Q8?3&Xrq^}G'{Ŀ<^*xaͽ5~OR1i 9eoWg[jK/]~r*.9CN%H @':fikn\ك?xP+%f:UFN;^L:.>QuJ}ĩ7=]ųy3D(nnU[|e|xyzPZ*r*[r׳˨KɑFtӎw|m\3w7|w[p1Xr"b9 '0=Xr"9 '0=Xr"9 '0=Xr"9 '0=Xr()s՗UjiuUwAdr AN:FriZBdΌ.'/DS ri!ܿ瓕f+ʌOSϪtz]҆yR+ Xr $OnT~ H=U)<nTz/9U},r ANUK7rcL9|z*bӕkz6ǑJ0s~r ANG ؒѼ&4G cM(,ɄRjdXS}B@ L_|FJg{^X]FN r ANDڄaWqi\9IxgbgR2k ټjd4RSYrˉ9 ɢz9r0[^Z;^>J] ']87"l֣*i.U_j @N`!ȉ L@N`!ȉ L@N`!ȉ L23s~LF|o4rK0r"ã 9遜BA ,9遜BA ,9遜B&zbT&"8XH# 9 '0=XHKH ;:>''B* {kGeB@N`!r7&Vi7pNEIr2r"@N`!r ̓Hwyk\>7LfDLNDȉ 999 GKj9Sz9D@N`!s9y%Ԃb@N`!5<4<=rʔSW-Bj 7_GNë!bé܋#yB ,@N`!ȉ L@N`!ȉ L@N`!ȉ L23s~LF|o4rK0r"ã 9遜BA ,v^~/,?$R^Ns_?"$RUNKNJƗS0 ym[fC֔JϢVolb_4eo? 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W]fH](ƍc)),}P()NnӧOR Pykd.C ZM΢.10CFZJ[IIʕguĉ:Tcٯ_)ꜟs.10C&zΝ={VDF}ZN"33𴞿ث.10Czx z!^ iл ]L f@d.10Ci&ȁ{+=3x/2лEMkIENDB`java-design-patterns-1.18.0/iterator/pom.xml000066400000000000000000000041011322244523500207730ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 iterator org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.junit.jupiter junit-jupiter-params test java-design-patterns-1.18.0/iterator/src/000077500000000000000000000000001322244523500202515ustar00rootroot00000000000000java-design-patterns-1.18.0/iterator/src/main/000077500000000000000000000000001322244523500211755ustar00rootroot00000000000000java-design-patterns-1.18.0/iterator/src/main/java/000077500000000000000000000000001322244523500221165ustar00rootroot00000000000000java-design-patterns-1.18.0/iterator/src/main/java/com/000077500000000000000000000000001322244523500226745ustar00rootroot00000000000000java-design-patterns-1.18.0/iterator/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500245245ustar00rootroot00000000000000java-design-patterns-1.18.0/iterator/src/main/java/com/iluwatar/iterator/000077500000000000000000000000001322244523500263555ustar00rootroot00000000000000java-design-patterns-1.18.0/iterator/src/main/java/com/iluwatar/iterator/App.java000066400000000000000000000051471322244523500277470ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.iterator; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * The Iterator pattern is a design pattern in which an iterator is used to traverse a container and * access the container's elements. The Iterator pattern decouples algorithms from containers. *

* In this example the Iterator ({@link ItemIterator}) adds abstraction layer on top of a collection * ({@link TreasureChest}). This way the collection can change its internal implementation without * affecting its clients. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args command line args */ public static void main(String[] args) { TreasureChest chest = new TreasureChest(); ItemIterator ringIterator = chest.iterator(ItemType.RING); while (ringIterator.hasNext()) { LOGGER.info(ringIterator.next().toString()); } LOGGER.info("----------"); ItemIterator potionIterator = chest.iterator(ItemType.POTION); while (potionIterator.hasNext()) { LOGGER.info(potionIterator.next().toString()); } LOGGER.info("----------"); ItemIterator weaponIterator = chest.iterator(ItemType.WEAPON); while (weaponIterator.hasNext()) { LOGGER.info(weaponIterator.next().toString()); } LOGGER.info("----------"); ItemIterator it = chest.iterator(ItemType.ANY); while (it.hasNext()) { LOGGER.info(it.next().toString()); } } } java-design-patterns-1.18.0/iterator/src/main/java/com/iluwatar/iterator/Item.java000066400000000000000000000030211322244523500301120ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.iterator; /** * * Item * */ public class Item { private ItemType type; private String name; public Item(ItemType type, String name) { this.setType(type); this.name = name; } @Override public String toString() { return name; } public ItemType getType() { return type; } public final void setType(ItemType type) { this.type = type; } } java-design-patterns-1.18.0/iterator/src/main/java/com/iluwatar/iterator/ItemIterator.java000066400000000000000000000024141322244523500316310ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.iterator; /** * * ItemIterator interface. * */ public interface ItemIterator { boolean hasNext(); Item next(); } java-design-patterns-1.18.0/iterator/src/main/java/com/iluwatar/iterator/ItemType.java000066400000000000000000000023671322244523500307700ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.iterator; /** * * ItemType enumeration * */ public enum ItemType { ANY, WEAPON, RING, POTION } java-design-patterns-1.18.0/iterator/src/main/java/com/iluwatar/iterator/TreasureChest.java000066400000000000000000000044031322244523500320020ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.iterator; import java.util.ArrayList; import java.util.List; /** * * TreasureChest, the collection class. * */ public class TreasureChest { private List items; /** * Constructor */ public TreasureChest() { items = new ArrayList<>(); items.add(new Item(ItemType.POTION, "Potion of courage")); items.add(new Item(ItemType.RING, "Ring of shadows")); items.add(new Item(ItemType.POTION, "Potion of wisdom")); items.add(new Item(ItemType.POTION, "Potion of blood")); items.add(new Item(ItemType.WEAPON, "Sword of silver +1")); items.add(new Item(ItemType.POTION, "Potion of rust")); items.add(new Item(ItemType.POTION, "Potion of healing")); items.add(new Item(ItemType.RING, "Ring of armor")); items.add(new Item(ItemType.WEAPON, "Steel halberd")); items.add(new Item(ItemType.WEAPON, "Dagger of poison")); } ItemIterator iterator(ItemType itemType) { return new TreasureChestItemIterator(this, itemType); } /** * Get all items */ public List getItems() { List list = new ArrayList<>(); list.addAll(items); return list; } } TreasureChestItemIterator.java000066400000000000000000000041671322244523500342630ustar00rootroot00000000000000java-design-patterns-1.18.0/iterator/src/main/java/com/iluwatar/iterator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.iterator; import java.util.List; /** * * TreasureChestItemIterator * */ public class TreasureChestItemIterator implements ItemIterator { private TreasureChest chest; private int idx; private ItemType type; /** * Constructor */ public TreasureChestItemIterator(TreasureChest chest, ItemType type) { this.chest = chest; this.type = type; this.idx = -1; } @Override public boolean hasNext() { return findNextIdx() != -1; } @Override public Item next() { idx = findNextIdx(); if (idx != -1) { return chest.getItems().get(idx); } return null; } private int findNextIdx() { List items = chest.getItems(); boolean found = false; int tempIdx = idx; while (!found) { tempIdx++; if (tempIdx >= items.size()) { tempIdx = -1; break; } if (type.equals(ItemType.ANY) || items.get(tempIdx).getType().equals(type)) { break; } } return tempIdx; } } java-design-patterns-1.18.0/iterator/src/test/000077500000000000000000000000001322244523500212305ustar00rootroot00000000000000java-design-patterns-1.18.0/iterator/src/test/java/000077500000000000000000000000001322244523500221515ustar00rootroot00000000000000java-design-patterns-1.18.0/iterator/src/test/java/com/000077500000000000000000000000001322244523500227275ustar00rootroot00000000000000java-design-patterns-1.18.0/iterator/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500245575ustar00rootroot00000000000000java-design-patterns-1.18.0/iterator/src/test/java/com/iluwatar/iterator/000077500000000000000000000000001322244523500264105ustar00rootroot00000000000000java-design-patterns-1.18.0/iterator/src/test/java/com/iluwatar/iterator/AppTest.java000066400000000000000000000025111322244523500306320ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.iterator; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/iterator/src/test/java/com/iluwatar/iterator/TreasureChestTest.java000066400000000000000000000102701322244523500326740ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.iterator; import org.junit.jupiter.params.ParameterizedTest; import org.junit.jupiter.params.provider.MethodSource; import java.util.ArrayList; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.fail; /** * Date: 12/14/15 - 2:58 PM * * @author Jeroen Meulemeester */ public class TreasureChestTest { /** * Create a list of all expected items in the chest. * * @return The set of all expected items in the chest */ public static List dataProvider() { final List parameters = new ArrayList<>(); parameters.add(new Object[]{new Item(ItemType.POTION, "Potion of courage")}); parameters.add(new Object[]{new Item(ItemType.RING, "Ring of shadows")}); parameters.add(new Object[]{new Item(ItemType.POTION, "Potion of wisdom")}); parameters.add(new Object[]{new Item(ItemType.POTION, "Potion of blood")}); parameters.add(new Object[]{new Item(ItemType.WEAPON, "Sword of silver +1")}); parameters.add(new Object[]{new Item(ItemType.POTION, "Potion of rust")}); parameters.add(new Object[]{new Item(ItemType.POTION, "Potion of healing")}); parameters.add(new Object[]{new Item(ItemType.RING, "Ring of armor")}); parameters.add(new Object[]{new Item(ItemType.WEAPON, "Steel halberd")}); parameters.add(new Object[]{new Item(ItemType.WEAPON, "Dagger of poison")}); return parameters; } /** * Test if the expected item can be retrieved from the chest using the {@link ItemIterator} */ @ParameterizedTest @MethodSource("dataProvider") public void testIterator(Item expectedItem) { final TreasureChest chest = new TreasureChest(); final ItemIterator iterator = chest.iterator(expectedItem.getType()); assertNotNull(iterator); while (iterator.hasNext()) { final Item item = iterator.next(); assertNotNull(item); assertEquals(expectedItem.getType(), item.getType()); final String name = item.toString(); assertNotNull(name); if (expectedItem.toString().equals(name)) { return; } } fail("Expected to find item [" + expectedItem + "] using iterator, but we didn't."); } /** * Test if the expected item can be retrieved from the chest using the {@link * TreasureChest#getItems()} method */ @ParameterizedTest @MethodSource("dataProvider") public void testGetItems(Item expectedItem) throws Exception { final TreasureChest chest = new TreasureChest(); final List items = chest.getItems(); assertNotNull(items); for (final Item item : items) { assertNotNull(item); assertNotNull(item.getType()); assertNotNull(item.toString()); final boolean sameType = expectedItem.getType() == item.getType(); final boolean sameName = expectedItem.toString().equals(item.toString()); if (sameType && sameName) { return; } } fail("Expected to find item [" + expectedItem + "] in the item list, but we didn't."); } }java-design-patterns-1.18.0/layers/000077500000000000000000000000001322244523500171305ustar00rootroot00000000000000java-design-patterns-1.18.0/layers/README.md000066400000000000000000000014251322244523500204110ustar00rootroot00000000000000--- layout: pattern title: Layers folder: layers permalink: /patterns/layers/ pumlformat: svg categories: Architectural tags: - Java - Difficulty-Intermediate - Spring --- ## Intent Layers is an architectural style where software responsibilities are divided among the different layers of the application. ![alt text](./etc/layers.png "Layers") ## Applicability Use the Layers architecture when * you want clearly divide software responsibilities into different parts of the program * you want to prevent a change from propagating throughout the application * you want to make your application more maintainable and testable ## Credits * [Pattern Oriented Software Architecture Vol I-V](http://www.amazon.com/Pattern-Oriented-Software-Architecture-Volume-Patterns/dp/0471958697) java-design-patterns-1.18.0/layers/etc/000077500000000000000000000000001322244523500177035ustar00rootroot00000000000000java-design-patterns-1.18.0/layers/etc/layers.png000066400000000000000000002762241322244523500217250ustar00rootroot00000000000000PNG  IHDR|[IDATxl}'?9EQssZ28&3V3\&˴+lR=Y^ʮ)9i;?se;X\6Q n鮸B?3̏%wٙ}]Rg]i> CG Ǒ#@29D}j2Y;d(d(d(r蒡EBK   . \P:KV *t۽5!Cv9U1KOP@ ee5lPu`NS?%m9 P5ȑW$Gp, ٫j/u҂A5h6%`/bi[ YN5m3Z3Ȥ-'C*v9hSmPkgzx, ZK:kFJ+X,˥VmqdVGzmg-l:| (9CyLĽG A|V_&5Ad(|Qfrnឣ/~ϋҷ})%Rء^#e(K~OyJoLm7J4CY;%C|[뢼c/Cq(8oěh6K[U7Lj9/)u>Z2`q GJ{//zpycD6^Z*7"q#Gr34 v\ yPJ@23[إ,P>_Xrrx6/F$IWKOl{ nZ^CTgrZsۋS_zGw}O<|?2r$gNU?˃}d2`q G̷OA&h^9 yJH<.n}AA{#`ޥP@M% ґƤtb+@K%&F>ijQN½wbB$Cv9?D>Ơ3?p*)\ZХ$&3[B隦6 r2`q C&%i-Y4hH6l}w/ɱ YiP@P e>f(:'A0Қ%B: uZ-/s28kP2x,DD!H~ý3tk>.m۠$>P @ e,]F4-v9PrG P?ARBv9PPtP"C!C%C @ @C>@29Ca 2PPtP"C!C%C @ @.-s @P @.22]2PPtP"C!C%C @ @.22]2Lg(vc)~5e6%^kM`AgrT*C+c7la5Y;ʩ ^g?i6 @ o=|| 2Ngɲ% Yb™Vk[$ )GlYr/.+Uz =kA#HPNջ7NlPŗbaT"ݴ:PPJ@je(-2`q   . \d(d(d(r:L|Ȧr=GVPVX__7} j @;vlff2rƍÇMLLmӇ>P‚xpep ZĄPd(cwwwrr2rffqsVPJP'd(ׯ_;t! 25eYVlP7d(jbnnncc#q#fP7>lgbbn~D @-,,h:*p :>n'&&J>Cvww'''3VqPOd(*oqqqee%cҎ@-FÇ>LFDF PCC0pd(PP  b>G7@ 1#CPCC0pd(jP  58G @ 1!C0pt3P  @>258GPCC0pd(PP  b>G7@ 1#CPCC0pd(jP  58G @ 1!C0pt3P  @>258GPCC0pd(PP  b>G7@ 1#CPCC0pd(jP  #G~@hs*׽97^~WG?woſ/l?#$b$>vw4Vk3ZKx2UFkt\b^Òؾ.jG]:ŗS360ZݛWfң쇱7x?_^E=e&E#oԉtȘEJV#SҍX.G^^A['weJJ] KbZmD V;q 7ӯx+OgGP{.)G 菫A_\tF݂ 먣ZMIZjI!Q`{ V#SmJFц0Z X"V:2d(0j9 3-YP&\juon;c_{QWE}:!>TR(bF["S^w9B A"m u#2vM$(MSd((CJVڕ2WWË^ u2Fumrj(E e V3wmC_wc~E7/grΛ? 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; import java.util.Arrays; /** * * Layers is an architectural style where software responsibilities are divided among the different layers of the * application. *

* This example demonstrates a traditional 3-layer architecture consisting of data access layer, business layer and * presentation layer. *

* The data access layer is formed of Spring Data repositories CakeDao, CakeToppingDao and * CakeLayerDao. The repositories can be used for CRUD operations on cakes, cake toppings and cake layers * respectively. *

* The business layer is built on top of the data access layer. CakeBakingService offers methods to * retrieve available cake toppings and cake layers and baked cakes. Also the service is used to create new cakes out of * cake toppings and cake layers. *

* The presentation layer is built on the business layer and in this example it simply lists the cakes that have been * baked. *

* We have applied so called strict layering which means that the layers can only access the classes directly beneath * them. This leads the solution to create an additional set of DTOs ( CakeInfo, * CakeToppingInfo, CakeLayerInfo) to translate data between layers. In other words, * CakeBakingService cannot return entities ( Cake, CakeTopping, * CakeLayer) directly since these reside on data access layer but instead translates these into business * layer DTOs (CakeInfo, CakeToppingInfo, CakeLayerInfo) and returns them * instead. This way the presentation layer does not have any knowledge of other layers than the business layer and thus * is not affected by changes to them. * * @see Cake * @see CakeTopping * @see CakeLayer * @see CakeDao * @see CakeToppingDao * @see CakeLayerDao * @see CakeBakingService * @see CakeInfo * @see CakeToppingInfo * @see CakeLayerInfo * */ public class App { private static CakeBakingService cakeBakingService = new CakeBakingServiceImpl(); /** * Application entry point * * @param args Command line parameters */ public static void main(String[] args) { // initialize example data initializeData(cakeBakingService); // create view and render it CakeViewImpl cakeView = new CakeViewImpl(cakeBakingService); cakeView.render(); } /** * Initializes the example data */ private static void initializeData(CakeBakingService cakeBakingService) { cakeBakingService.saveNewLayer(new CakeLayerInfo("chocolate", 1200)); cakeBakingService.saveNewLayer(new CakeLayerInfo("banana", 900)); cakeBakingService.saveNewLayer(new CakeLayerInfo("strawberry", 950)); cakeBakingService.saveNewLayer(new CakeLayerInfo("lemon", 950)); cakeBakingService.saveNewLayer(new CakeLayerInfo("vanilla", 950)); cakeBakingService.saveNewLayer(new CakeLayerInfo("strawberry", 950)); cakeBakingService.saveNewTopping(new CakeToppingInfo("candies", 350)); cakeBakingService.saveNewTopping(new CakeToppingInfo("cherry", 350)); CakeInfo cake1 = new CakeInfo(new CakeToppingInfo("candies", 0), Arrays.asList(new CakeLayerInfo( "chocolate", 0), new CakeLayerInfo("banana", 0), new CakeLayerInfo("strawberry", 0))); try { cakeBakingService.bakeNewCake(cake1); } catch (CakeBakingException e) { e.printStackTrace(); } CakeInfo cake2 = new CakeInfo(new CakeToppingInfo("cherry", 0), Arrays.asList( new CakeLayerInfo("vanilla", 0), new CakeLayerInfo("lemon", 0), new CakeLayerInfo( "strawberry", 0))); try { cakeBakingService.bakeNewCake(cake2); } catch (CakeBakingException e) { e.printStackTrace(); } } } java-design-patterns-1.18.0/layers/src/main/java/com/iluwatar/layers/Cake.java000066400000000000000000000045451322244523500272070ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; import java.util.HashSet; import java.util.Set; import javax.persistence.CascadeType; import javax.persistence.Entity; import javax.persistence.FetchType; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.OneToMany; import javax.persistence.OneToOne; /** * * Cake entity * */ @Entity public class Cake { @Id @GeneratedValue private Long id; @OneToOne(cascade = CascadeType.REMOVE) private CakeTopping topping; @OneToMany(cascade = CascadeType.REMOVE, fetch = FetchType.EAGER) private Set layers; public Cake() { setLayers(new HashSet<>()); } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public CakeTopping getTopping() { return topping; } public void setTopping(CakeTopping topping) { this.topping = topping; } public Set getLayers() { return layers; } public final void setLayers(Set layers) { this.layers = layers; } public void addLayer(CakeLayer layer) { this.layers.add(layer); } @Override public String toString() { return String.format("id=%s topping=%s layers=%s", id, topping, layers.toString()); } } java-design-patterns-1.18.0/layers/src/main/java/com/iluwatar/layers/CakeBakingException.java000066400000000000000000000026441322244523500322000ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; /** * * Custom exception used in cake baking * */ public class CakeBakingException extends Exception { private static final long serialVersionUID = 1L; public CakeBakingException() {} public CakeBakingException(String message) { super(message); } } java-design-patterns-1.18.0/layers/src/main/java/com/iluwatar/layers/CakeBakingService.java000066400000000000000000000034541322244523500316420ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; import java.util.List; /** * * Service for cake baking operations * */ public interface CakeBakingService { /** * Bakes new cake according to parameters */ void bakeNewCake(CakeInfo cakeInfo) throws CakeBakingException; /** * Get all cakes */ List getAllCakes(); /** * Store new cake topping */ void saveNewTopping(CakeToppingInfo toppingInfo); /** * Get available cake toppings */ List getAvailableToppings(); /** * Add new cake layer */ void saveNewLayer(CakeLayerInfo layerInfo); /** * Get available cake layers */ List getAvailableLayers(); } java-design-patterns-1.18.0/layers/src/main/java/com/iluwatar/layers/CakeBakingServiceImpl.java000066400000000000000000000145611322244523500324650ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; import java.util.ArrayList; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Optional; import java.util.Set; import java.util.stream.Collectors; import org.springframework.context.support.AbstractApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; /** * * Implementation of CakeBakingService * */ @Service @Transactional public class CakeBakingServiceImpl implements CakeBakingService { private AbstractApplicationContext context; public CakeBakingServiceImpl() { this.context = new ClassPathXmlApplicationContext("applicationContext.xml"); } @Override public void bakeNewCake(CakeInfo cakeInfo) throws CakeBakingException { List allToppings = getAvailableToppingEntities(); List matchingToppings = allToppings.stream().filter(t -> t.getName().equals(cakeInfo.cakeToppingInfo.name)) .collect(Collectors.toList()); if (matchingToppings.isEmpty()) { throw new CakeBakingException(String.format("Topping %s is not available", cakeInfo.cakeToppingInfo.name)); } List allLayers = getAvailableLayerEntities(); Set foundLayers = new HashSet<>(); for (CakeLayerInfo info : cakeInfo.cakeLayerInfos) { Optional found = allLayers.stream().filter(layer -> layer.getName().equals(info.name)).findFirst(); if (!found.isPresent()) { throw new CakeBakingException(String.format("Layer %s is not available", info.name)); } else { foundLayers.add(found.get()); } } CakeToppingDao toppingBean = context.getBean(CakeToppingDao.class); CakeTopping topping = toppingBean.findOne(matchingToppings.iterator().next().getId()); CakeDao cakeBean = context.getBean(CakeDao.class); Cake cake = new Cake(); cake.setTopping(topping); cake.setLayers(foundLayers); cakeBean.save(cake); topping.setCake(cake); toppingBean.save(topping); CakeLayerDao layerBean = context.getBean(CakeLayerDao.class); for (CakeLayer layer : foundLayers) { layer.setCake(cake); layerBean.save(layer); } } @Override public void saveNewTopping(CakeToppingInfo toppingInfo) { CakeToppingDao bean = context.getBean(CakeToppingDao.class); bean.save(new CakeTopping(toppingInfo.name, toppingInfo.calories)); } @Override public void saveNewLayer(CakeLayerInfo layerInfo) { CakeLayerDao bean = context.getBean(CakeLayerDao.class); bean.save(new CakeLayer(layerInfo.name, layerInfo.calories)); } private List getAvailableToppingEntities() { CakeToppingDao bean = context.getBean(CakeToppingDao.class); List result = new ArrayList<>(); Iterator iterator = bean.findAll().iterator(); while (iterator.hasNext()) { CakeTopping topping = iterator.next(); if (topping.getCake() == null) { result.add(topping); } } return result; } @Override public List getAvailableToppings() { CakeToppingDao bean = context.getBean(CakeToppingDao.class); List result = new ArrayList<>(); Iterator iterator = bean.findAll().iterator(); while (iterator.hasNext()) { CakeTopping next = iterator.next(); if (next.getCake() == null) { result.add(new CakeToppingInfo(next.getId(), next.getName(), next.getCalories())); } } return result; } private List getAvailableLayerEntities() { CakeLayerDao bean = context.getBean(CakeLayerDao.class); List result = new ArrayList<>(); Iterator iterator = bean.findAll().iterator(); while (iterator.hasNext()) { CakeLayer next = iterator.next(); if (next.getCake() == null) { result.add(next); } } return result; } @Override public List getAvailableLayers() { CakeLayerDao bean = context.getBean(CakeLayerDao.class); List result = new ArrayList<>(); Iterator iterator = bean.findAll().iterator(); while (iterator.hasNext()) { CakeLayer next = iterator.next(); if (next.getCake() == null) { result.add(new CakeLayerInfo(next.getId(), next.getName(), next.getCalories())); } } return result; } @Override public List getAllCakes() { CakeDao cakeBean = context.getBean(CakeDao.class); List result = new ArrayList<>(); Iterator iterator = cakeBean.findAll().iterator(); while (iterator.hasNext()) { Cake cake = iterator.next(); CakeToppingInfo cakeToppingInfo = new CakeToppingInfo(cake.getTopping().getId(), cake.getTopping().getName(), cake .getTopping().getCalories()); List cakeLayerInfos = new ArrayList<>(); for (CakeLayer layer : cake.getLayers()) { cakeLayerInfos.add(new CakeLayerInfo(layer.getId(), layer.getName(), layer.getCalories())); } CakeInfo cakeInfo = new CakeInfo(cake.getId(), cakeToppingInfo, cakeLayerInfos); result.add(cakeInfo); } return result; } } java-design-patterns-1.18.0/layers/src/main/java/com/iluwatar/layers/CakeDao.java000066400000000000000000000025761322244523500276350ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; import org.springframework.data.repository.CrudRepository; import org.springframework.stereotype.Repository; /** * * CRUD repository for cakes * */ @Repository public interface CakeDao extends CrudRepository { } java-design-patterns-1.18.0/layers/src/main/java/com/iluwatar/layers/CakeInfo.java000066400000000000000000000044701322244523500300200ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; import java.util.List; import java.util.Optional; /** * * DTO for cakes * */ public class CakeInfo { public final Optional id; public final CakeToppingInfo cakeToppingInfo; public final List cakeLayerInfos; /** * Constructor */ public CakeInfo(Long id, CakeToppingInfo cakeToppingInfo, List cakeLayerInfos) { this.id = Optional.of(id); this.cakeToppingInfo = cakeToppingInfo; this.cakeLayerInfos = cakeLayerInfos; } /** * Constructor */ public CakeInfo(CakeToppingInfo cakeToppingInfo, List cakeLayerInfos) { this.id = Optional.empty(); this.cakeToppingInfo = cakeToppingInfo; this.cakeLayerInfos = cakeLayerInfos; } /** * Calculate calories */ public int calculateTotalCalories() { int total = cakeToppingInfo != null ? cakeToppingInfo.calories : 0; total += cakeLayerInfos.stream().mapToInt(c -> c.calories).sum(); return total; } @Override public String toString() { return String.format("CakeInfo id=%d topping=%s layers=%s totalCalories=%d", id.orElse(-1L), cakeToppingInfo, cakeLayerInfos, calculateTotalCalories()); } } java-design-patterns-1.18.0/layers/src/main/java/com/iluwatar/layers/CakeLayer.java000066400000000000000000000043731322244523500302030ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; import javax.persistence.CascadeType; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.ManyToOne; /** * * CakeLayer entity * */ @Entity public class CakeLayer { @Id @GeneratedValue private Long id; private String name; private int calories; @ManyToOne(cascade = CascadeType.ALL) private Cake cake; public CakeLayer() {} public CakeLayer(String name, int calories) { this.setName(name); this.setCalories(calories); } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getName() { return name; } public final void setName(String name) { this.name = name; } public int getCalories() { return calories; } public final void setCalories(int calories) { this.calories = calories; } @Override public String toString() { return String.format("id=%s name=%s calories=%d", id, name, calories); } public Cake getCake() { return cake; } public void setCake(Cake cake) { this.cake = cake; } } java-design-patterns-1.18.0/layers/src/main/java/com/iluwatar/layers/CakeLayerDao.java000066400000000000000000000026161322244523500306250ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; import org.springframework.data.repository.CrudRepository; import org.springframework.stereotype.Repository; /** * * CRUD repository for cake layers * */ @Repository public interface CakeLayerDao extends CrudRepository { } java-design-patterns-1.18.0/layers/src/main/java/com/iluwatar/layers/CakeLayerInfo.java000066400000000000000000000035031322244523500310110ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; import java.util.Optional; /** * * DTO for cake layers * */ public class CakeLayerInfo { public final Optional id; public final String name; public final int calories; /** * Constructor */ public CakeLayerInfo(Long id, String name, int calories) { this.id = Optional.of(id); this.name = name; this.calories = calories; } /** * Constructor */ public CakeLayerInfo(String name, int calories) { this.id = Optional.empty(); this.name = name; this.calories = calories; } @Override public String toString() { return String.format("CakeLayerInfo id=%d name=%s calories=%d", id.orElse(-1L), name, calories); } } java-design-patterns-1.18.0/layers/src/main/java/com/iluwatar/layers/CakeTopping.java000066400000000000000000000044011322244523500305370ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; import javax.persistence.CascadeType; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.OneToOne; /** * * CakeTopping entity * */ @Entity public class CakeTopping { @Id @GeneratedValue private Long id; private String name; private int calories; @OneToOne(cascade = CascadeType.ALL) private Cake cake; public CakeTopping() {} public CakeTopping(String name, int calories) { this.setName(name); this.setCalories(calories); } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getName() { return name; } public final void setName(String name) { this.name = name; } public final int getCalories() { return calories; } public void setCalories(int calories) { this.calories = calories; } @Override public String toString() { return String.format("id=%s name=%s calories=%d", id, name, calories); } public Cake getCake() { return cake; } public void setCake(Cake cake) { this.cake = cake; } } java-design-patterns-1.18.0/layers/src/main/java/com/iluwatar/layers/CakeToppingDao.java000066400000000000000000000026201322244523500311640ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; import org.springframework.data.repository.CrudRepository; import org.springframework.stereotype.Repository; /** * * CRUD repository cake toppings * */ @Repository public interface CakeToppingDao extends CrudRepository { } java-design-patterns-1.18.0/layers/src/main/java/com/iluwatar/layers/CakeToppingInfo.java000066400000000000000000000035151322244523500313600ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; import java.util.Optional; /** * * DTO for cake toppings * */ public class CakeToppingInfo { public final Optional id; public final String name; public final int calories; /** * Constructor */ public CakeToppingInfo(Long id, String name, int calories) { this.id = Optional.of(id); this.name = name; this.calories = calories; } /** * Constructor */ public CakeToppingInfo(String name, int calories) { this.id = Optional.empty(); this.name = name; this.calories = calories; } @Override public String toString() { return String.format("CakeToppingInfo id=%d name=%s calories=%d", id.orElse(-1L), name, calories); } } java-design-patterns-1.18.0/layers/src/main/java/com/iluwatar/layers/CakeViewImpl.java000066400000000000000000000032531322244523500306570ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * View implementation for displaying cakes * */ public class CakeViewImpl implements View { private static final Logger LOGGER = LoggerFactory.getLogger(CakeViewImpl.class); private CakeBakingService cakeBakingService; public CakeViewImpl(CakeBakingService cakeBakingService) { this.cakeBakingService = cakeBakingService; } public void render() { cakeBakingService.getAllCakes().stream().forEach(cake -> LOGGER.info(cake.toString())); } } java-design-patterns-1.18.0/layers/src/main/java/com/iluwatar/layers/View.java000066400000000000000000000023451322244523500272520ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; /** * * View interface * */ public interface View { void render(); } java-design-patterns-1.18.0/layers/src/main/resources/000077500000000000000000000000001322244523500226555ustar00rootroot00000000000000java-design-patterns-1.18.0/layers/src/main/resources/META-INF/000077500000000000000000000000001322244523500240155ustar00rootroot00000000000000java-design-patterns-1.18.0/layers/src/main/resources/META-INF/persistence.xml000066400000000000000000000027401322244523500270660ustar00rootroot00000000000000 java-design-patterns-1.18.0/layers/src/main/resources/applicationContext.xml000066400000000000000000000062201322244523500272470ustar00rootroot00000000000000 java-design-patterns-1.18.0/layers/src/main/resources/logback.xml000066400000000000000000000041651322244523500250070ustar00rootroot00000000000000 layers.log layers-%d.log 5 %-5p [%d{ISO8601,UTC}] %c: %m%n %-5p [%d{ISO8601,UTC}] %c: %m%n java-design-patterns-1.18.0/layers/src/test/000077500000000000000000000000001322244523500206765ustar00rootroot00000000000000java-design-patterns-1.18.0/layers/src/test/java/000077500000000000000000000000001322244523500216175ustar00rootroot00000000000000java-design-patterns-1.18.0/layers/src/test/java/com/000077500000000000000000000000001322244523500223755ustar00rootroot00000000000000java-design-patterns-1.18.0/layers/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500242255ustar00rootroot00000000000000java-design-patterns-1.18.0/layers/src/test/java/com/iluwatar/layers/000077500000000000000000000000001322244523500255245ustar00rootroot00000000000000java-design-patterns-1.18.0/layers/src/test/java/com/iluwatar/layers/AppTest.java000066400000000000000000000025071322244523500277530ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/layers/src/test/java/com/iluwatar/layers/CakeBakingExceptionTest.java000066400000000000000000000036451322244523500330750ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNull; /** * Date: 12/15/15 - 7:57 PM * * @author Jeroen Meulemeester */ public class CakeBakingExceptionTest { @Test public void testConstructor() throws Exception { final CakeBakingException exception = new CakeBakingException(); assertNull(exception.getMessage()); assertNull(exception.getCause()); } @Test public void testConstructorWithMessage() throws Exception { final String expectedMessage = "message"; final CakeBakingException exception = new CakeBakingException(expectedMessage); assertEquals(expectedMessage, exception.getMessage()); assertNull(exception.getCause()); } } java-design-patterns-1.18.0/layers/src/test/java/com/iluwatar/layers/CakeBakingServiceImplTest.java000066400000000000000000000155661322244523500333660ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; import org.junit.jupiter.api.Test; import java.util.Arrays; import java.util.Collections; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertThrows; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Date: 12/15/15 - 9:55 PM * * @author Jeroen Meulemeester */ public class CakeBakingServiceImplTest { @Test public void testLayers() throws CakeBakingException { final CakeBakingServiceImpl service = new CakeBakingServiceImpl(); final List initialLayers = service.getAvailableLayers(); assertNotNull(initialLayers); assertTrue(initialLayers.isEmpty()); service.saveNewLayer(new CakeLayerInfo("Layer1", 1000)); service.saveNewLayer(new CakeLayerInfo("Layer2", 2000)); final List availableLayers = service.getAvailableLayers(); assertNotNull(availableLayers); assertEquals(2, availableLayers.size()); for (final CakeLayerInfo layer : availableLayers) { assertNotNull(layer.id); assertNotNull(layer.name); assertNotNull(layer.toString()); assertTrue(layer.calories > 0); } } @Test public void testToppings() throws CakeBakingException { final CakeBakingServiceImpl service = new CakeBakingServiceImpl(); final List initialToppings = service.getAvailableToppings(); assertNotNull(initialToppings); assertTrue(initialToppings.isEmpty()); service.saveNewTopping(new CakeToppingInfo("Topping1", 1000)); service.saveNewTopping(new CakeToppingInfo("Topping2", 2000)); final List availableToppings = service.getAvailableToppings(); assertNotNull(availableToppings); assertEquals(2, availableToppings.size()); for (final CakeToppingInfo topping : availableToppings) { assertNotNull(topping.id); assertNotNull(topping.name); assertNotNull(topping.toString()); assertTrue(topping.calories > 0); } } @Test public void testBakeCakes() throws CakeBakingException { final CakeBakingServiceImpl service = new CakeBakingServiceImpl(); final List initialCakes = service.getAllCakes(); assertNotNull(initialCakes); assertTrue(initialCakes.isEmpty()); final CakeToppingInfo topping1 = new CakeToppingInfo("Topping1", 1000); final CakeToppingInfo topping2 = new CakeToppingInfo("Topping2", 2000); service.saveNewTopping(topping1); service.saveNewTopping(topping2); final CakeLayerInfo layer1 = new CakeLayerInfo("Layer1", 1000); final CakeLayerInfo layer2 = new CakeLayerInfo("Layer2", 2000); final CakeLayerInfo layer3 = new CakeLayerInfo("Layer3", 2000); service.saveNewLayer(layer1); service.saveNewLayer(layer2); service.saveNewLayer(layer3); service.bakeNewCake(new CakeInfo(topping1, Arrays.asList(layer1, layer2))); service.bakeNewCake(new CakeInfo(topping2, Collections.singletonList(layer3))); final List allCakes = service.getAllCakes(); assertNotNull(allCakes); assertEquals(2, allCakes.size()); for (final CakeInfo cakeInfo : allCakes) { assertNotNull(cakeInfo.id); assertNotNull(cakeInfo.cakeToppingInfo); assertNotNull(cakeInfo.cakeLayerInfos); assertNotNull(cakeInfo.toString()); assertFalse(cakeInfo.cakeLayerInfos.isEmpty()); assertTrue(cakeInfo.calculateTotalCalories() > 0); } } @Test public void testBakeCakeMissingTopping() throws CakeBakingException { final CakeBakingServiceImpl service = new CakeBakingServiceImpl(); final CakeLayerInfo layer1 = new CakeLayerInfo("Layer1", 1000); final CakeLayerInfo layer2 = new CakeLayerInfo("Layer2", 2000); service.saveNewLayer(layer1); service.saveNewLayer(layer2); final CakeToppingInfo missingTopping = new CakeToppingInfo("Topping1", 1000); assertThrows(CakeBakingException.class, () -> { service.bakeNewCake(new CakeInfo(missingTopping, Arrays.asList(layer1, layer2))); }); } @Test public void testBakeCakeMissingLayer() throws CakeBakingException { final CakeBakingServiceImpl service = new CakeBakingServiceImpl(); final List initialCakes = service.getAllCakes(); assertNotNull(initialCakes); assertTrue(initialCakes.isEmpty()); final CakeToppingInfo topping1 = new CakeToppingInfo("Topping1", 1000); service.saveNewTopping(topping1); final CakeLayerInfo layer1 = new CakeLayerInfo("Layer1", 1000); service.saveNewLayer(layer1); final CakeLayerInfo missingLayer = new CakeLayerInfo("Layer2", 2000); assertThrows(CakeBakingException.class, () -> { service.bakeNewCake(new CakeInfo(topping1, Arrays.asList(layer1, missingLayer))); }); } @Test public void testBakeCakesUsedLayer() throws CakeBakingException { final CakeBakingServiceImpl service = new CakeBakingServiceImpl(); final List initialCakes = service.getAllCakes(); assertNotNull(initialCakes); assertTrue(initialCakes.isEmpty()); final CakeToppingInfo topping1 = new CakeToppingInfo("Topping1", 1000); final CakeToppingInfo topping2 = new CakeToppingInfo("Topping2", 2000); service.saveNewTopping(topping1); service.saveNewTopping(topping2); final CakeLayerInfo layer1 = new CakeLayerInfo("Layer1", 1000); final CakeLayerInfo layer2 = new CakeLayerInfo("Layer2", 2000); service.saveNewLayer(layer1); service.saveNewLayer(layer2); service.bakeNewCake(new CakeInfo(topping1, Arrays.asList(layer1, layer2))); assertThrows(CakeBakingException.class, () -> { service.bakeNewCake(new CakeInfo(topping2, Collections.singletonList(layer2))); }); } } java-design-patterns-1.18.0/layers/src/test/java/com/iluwatar/layers/CakeTest.java000066400000000000000000000073761322244523500301070ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; import org.junit.jupiter.api.Test; import java.util.HashSet; import java.util.Set; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertNull; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Date: 12/15/15 - 8:02 PM * * @author Jeroen Meulemeester */ public class CakeTest { @Test public void testSetId() { final Cake cake = new Cake(); assertNull(cake.getId()); final Long expectedId = Long.valueOf(1234L); cake.setId(expectedId); assertEquals(expectedId, cake.getId()); } @Test public void testSetTopping() { final Cake cake = new Cake(); assertNull(cake.getTopping()); final CakeTopping expectedTopping = new CakeTopping("DummyTopping", 1000); cake.setTopping(expectedTopping); assertEquals(expectedTopping, cake.getTopping()); } @Test public void testSetLayers() { final Cake cake = new Cake(); assertNotNull(cake.getLayers()); assertTrue(cake.getLayers().isEmpty()); final Set expectedLayers = new HashSet<>(); expectedLayers.add(new CakeLayer("layer1", 1000)); expectedLayers.add(new CakeLayer("layer2", 2000)); expectedLayers.add(new CakeLayer("layer3", 3000)); cake.setLayers(expectedLayers); assertEquals(expectedLayers, cake.getLayers()); } @Test public void testAddLayer() { final Cake cake = new Cake(); assertNotNull(cake.getLayers()); assertTrue(cake.getLayers().isEmpty()); final Set initialLayers = new HashSet<>(); initialLayers.add(new CakeLayer("layer1", 1000)); initialLayers.add(new CakeLayer("layer2", 2000)); cake.setLayers(initialLayers); assertEquals(initialLayers, cake.getLayers()); final CakeLayer newLayer = new CakeLayer("layer3", 3000); cake.addLayer(newLayer); final Set expectedLayers = new HashSet<>(); expectedLayers.addAll(initialLayers); expectedLayers.addAll(initialLayers); expectedLayers.add(newLayer); assertEquals(expectedLayers, cake.getLayers()); } @Test public void testToString() { final CakeTopping topping = new CakeTopping("topping", 20); topping.setId(2345L); final CakeLayer layer = new CakeLayer("layer", 100); layer.setId(3456L); final Cake cake = new Cake(); cake.setId(1234L); cake.setTopping(topping); cake.addLayer(layer); final String expected = "id=1234 topping=id=2345 name=topping calories=20 " + "layers=[id=3456 name=layer calories=100]"; assertEquals(expected, cake.toString()); } } java-design-patterns-1.18.0/layers/src/test/java/com/iluwatar/layers/CakeViewImplTest.java000066400000000000000000000064121322244523500315520ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.layers; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.slf4j.LoggerFactory; import java.util.ArrayList; import java.util.LinkedList; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.when; /** * Date: 12/15/15 - 10:04 PM * * @author Jeroen Meulemeester */ public class CakeViewImplTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(CakeViewImpl.class); } @AfterEach public void tearDown() { appender.stop(); } /** * Verify if the cake view renders the expected result */ @Test public void testRender() { final List layers = new ArrayList<>(); layers.add(new CakeLayerInfo("layer1", 1000)); layers.add(new CakeLayerInfo("layer2", 2000)); layers.add(new CakeLayerInfo("layer3", 3000)); final List cakes = new ArrayList<>(); final CakeInfo cake = new CakeInfo(new CakeToppingInfo("topping", 1000), layers); cakes.add(cake); final CakeBakingService bakingService = mock(CakeBakingService.class); when(bakingService.getAllCakes()).thenReturn(cakes); final CakeViewImpl cakeView = new CakeViewImpl(bakingService); assertEquals(0, appender.getLogSize()); cakeView.render(); assertEquals(cake.toString(), appender.getLastMessage()); } private class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender(Class clazz) { ((Logger) LoggerFactory.getLogger(clazz)).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public String getLastMessage() { return log.get(log.size() - 1).getFormattedMessage(); } public int getLogSize() { return log.size(); } } } java-design-patterns-1.18.0/lazy-loading/000077500000000000000000000000001322244523500202235ustar00rootroot00000000000000java-design-patterns-1.18.0/lazy-loading/README.md000066400000000000000000000015031322244523500215010ustar00rootroot00000000000000--- layout: pattern title: Lazy Loading folder: lazy-loading permalink: /patterns/lazy-loading/ categories: Other tags: - Java - Difficulty-Beginner - Idiom - Performance --- ## Intent Lazy loading is a design pattern commonly used to defer initialization of an object until the point at which it is needed. It can contribute to efficiency in the program's operation if properly and appropriately used. ![alt text](./etc/lazy-loading.png "Lazy Loading") ## Applicability Use the Lazy Loading idiom when * eager loading is expensive or the object to be loaded might not be needed at all ## Real world examples * JPA annotations @OneToOne, @OneToMany, @ManyToOne, @ManyToMany and fetch = FetchType.LAZY ## Credits * [J2EE Design Patterns](http://www.amazon.com/J2EE-Design-Patterns-William-Crawford/dp/0596004273/ref=sr_1_2) java-design-patterns-1.18.0/lazy-loading/etc/000077500000000000000000000000001322244523500207765ustar00rootroot00000000000000java-design-patterns-1.18.0/lazy-loading/etc/lazy-loading.png000066400000000000000000000266271322244523500241130ustar00rootroot00000000000000PNG  IHDR;B`r-^IDATxm$]GBHR>0|  v|ˋC#+˲7;YL,^̞cam-ݧL-qOVwULuWuӣUoOOOMz(5 P |ǚ9^&H;0^ru/HPY6ˠx@*8ABA) *X  D$c$4!Jc/jY2Ό1AlL R&BLr9VX?VAA"/B e"Ĥ±FO_qƬwjw}EXki? 2#g*hyP"Icf_$ٌn0@:Y6G|Px'HN}l34KHBƤ*8y,PPnj;m378t莀?ٍCq;wzJ3#g2,h*b,tL ǒacK=lSF%<&}OUχ3$ܟ"3r&(6H LDR sG9J7/cB->}aռ\d_B Sl IUݏ krtvݾcB*wOńXc ~,ӄl?V@co|գe.qĐ՗Te0oz$lXxwbBl b`1JY8V1-g,Zu&(\b\D$9cJA@ &ĤIip,(Af rLB Ae Up,R"TV  HHPY2H(h %B Ae Up,R"TVMXW mmڣ[T4"@2Dk":}xGlo#E$&~𰈗2Qzԙ3/l]rP"$ߢ͚qqH(qgrי(ôq߱(ԭ+/}Gs.đ` ^0c'v,֮8xJ|)wpS2Nc:Unы'k}__΅n LfFќ4ufNf;V2- QxOc~GS2Bc:g[{;߰yK?6m`'/x2*׹lp~еoI*eg&?دzw?Óqn{EC{$I9/{U#˻q oTҬIHG0X_t-: $C2 u $mS2Bڽw[G'_[_|1 !8Heӽʵ.dl5iOacw1Z~&4_+t.M&p*J$[ #'8VltՌ $C2&MekDQ sS2B*3_9^9cHW>qێƕOs] lrɆaN3/f]9_FI|`bX'&ifL( | +h+ CDG]2' Qx'2#[S2B /Njp\ǒ|rc_ ltɌ820 Ա2#ge *X  D$c$4! eP@J@*8ABA) *X  D$c$4! eP@J@ʪ:9po,u븨=312DJ$TT:E *Ql\U5&U)O - ˙ؙ2l Jxlfbff ;lOuٟKuӪղ 4 iBL 77_,^D02vJw';i7j%)v+%3Z 4!& U^%zך=˾4 ?q|XwvYBxbO'Mju4 iBL+&Bjz:̳:;yZ1ѯf9ٱ$4UecY.>'j:IgFTU@ *Ĥя^GIcYױx }f)X BLr7y-.usB)OkD 3ftU8VVBl LbDXPx@*8ABA) *X  D$c$4! eP@J@*8ABA) *Ď55u] ]v rl @Yacu,nr9^&!VAsR"TV  HHPY2H(h %B Aeر}t%h  R5ԱQ Ɛ ! eP@JT@<׸=*RZ2-8A*jAwR{)1-_ ±7lᥛ~+}Z)h㦫 Ig+_qB)8dn/Yi&uw?m\k?@ڿOU9n w>vvk-[_JYo nSI-xh/%R%^]>Є()nja8ʫdJRXLJŕ rX26ȥ):J-@wGsTFGvp{:+ +%u,@rANc:Wx2JA4@8VڪUM8%'Tu&Ȍ)LT埼u%26,r8WW# qvzsp+TI]gWMD;/"F.>ZW)qi8VHcjv)%٨ MS9S$.?U){cNqel yukgI[C{X+ vӜu W:$p,GSX7ijXY\RԱ}W>qo۴158ֱ.{^\̸C؂Ƭ$sJ3L@Jԏ^IFjŴo Y*ғh:Vt$R~Jӏu<[he5YeO9 \kQ/v|Tqޫ[2֎,hq ;J5-MUdJп# xz1 ]t_`oEcNJ&mqc^Ҍ|}K]=KN.x"ù/z(2"͞p3@J? $j2#gr(NvMRuY3f_'ø20IX)ZY3{m%c|B|R1wPSFI b3T^%cα~TϼyQ K;^Vik9*߼K޷F7:[oĵDș"C!!˒: |G%:@Ҧ7*W:SwŇ_>a1_^\B̝/%/=s xRA\jeb ?4 $q״8U ۡA +yeryŬAkñgT] U%eW$eP@J@*8ABA) *X  D $,f  LW! 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* This example shows different implementations of the pattern with increasing sophistication. *

* Additional information and lazy loading flavours are described in * http://martinfowler.com/eaaCatalog/lazyLoad.html * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args command line args */ public static void main(String[] args) { // Simple lazy loader - not thread safe HolderNaive holderNaive = new HolderNaive(); Heavy heavy = holderNaive.getHeavy(); LOGGER.info("heavy={}", heavy); // Thread safe lazy loader, but with heavy synchronization on each access HolderThreadSafe holderThreadSafe = new HolderThreadSafe(); Heavy another = holderThreadSafe.getHeavy(); LOGGER.info("another={}", another); // The most efficient lazy loader utilizing Java 8 features Java8Holder java8Holder = new Java8Holder(); Heavy next = java8Holder.getHeavy(); LOGGER.info("next={}", next); } } java-design-patterns-1.18.0/lazy-loading/src/main/java/com/iluwatar/lazy/loading/Heavy.java000066400000000000000000000031641322244523500316040ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.lazy.loading; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Heavy objects are expensive to create. * */ public class Heavy { private static final Logger LOGGER = LoggerFactory.getLogger(Heavy.class); /** * Constructor */ public Heavy() { LOGGER.info("Creating Heavy ..."); try { Thread.sleep(1000); } catch (InterruptedException e) { LOGGER.error("Exception caught.", e); } LOGGER.info("... Heavy created"); } } java-design-patterns-1.18.0/lazy-loading/src/main/java/com/iluwatar/lazy/loading/HolderNaive.java000066400000000000000000000032671322244523500327340ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.lazy.loading; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Simple implementation of the lazy loading idiom. However, this is not thread safe. * */ public class HolderNaive { private static final Logger LOGGER = LoggerFactory.getLogger(HolderNaive.class); private Heavy heavy; /** * Constructor */ public HolderNaive() { LOGGER.info("HolderNaive created"); } /** * Get heavy object */ public Heavy getHeavy() { if (heavy == null) { heavy = new Heavy(); } return heavy; } } HolderThreadSafe.java000066400000000000000000000034551322244523500336200ustar00rootroot00000000000000java-design-patterns-1.18.0/lazy-loading/src/main/java/com/iluwatar/lazy/loading/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.lazy.loading; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Same as HolderNaive but with added synchronization. This implementation is thread safe, but each * {@link #getHeavy()} call costs additional synchronization overhead. * */ public class HolderThreadSafe { private static final Logger LOGGER = LoggerFactory.getLogger(HolderThreadSafe.class); private Heavy heavy; /** * Constructor */ public HolderThreadSafe() { LOGGER.info("HolderThreadSafe created"); } /** * Get heavy object */ public synchronized Heavy getHeavy() { if (heavy == null) { heavy = new Heavy(); } return heavy; } } java-design-patterns-1.18.0/lazy-loading/src/main/java/com/iluwatar/lazy/loading/Java8Holder.java000066400000000000000000000041241322244523500326340ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.lazy.loading; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.function.Supplier; /** * * This lazy loader is thread safe and more efficient than {@link HolderThreadSafe}. It utilizes * Java 8 functional interface {@link Supplier} as {@link Heavy} factory. * */ public class Java8Holder { private static final Logger LOGGER = LoggerFactory.getLogger(Java8Holder.class); private Supplier heavy = () -> createAndCacheHeavy(); public Java8Holder() { LOGGER.info("Java8Holder created"); } public Heavy getHeavy() { return heavy.get(); } private synchronized Heavy createAndCacheHeavy() { class HeavyFactory implements Supplier { private final Heavy heavyInstance = new Heavy(); @Override public Heavy get() { return heavyInstance; } } if (!HeavyFactory.class.isInstance(heavy)) { heavy = new HeavyFactory(); } return heavy.get(); } } java-design-patterns-1.18.0/lazy-loading/src/test/000077500000000000000000000000001322244523500217715ustar00rootroot00000000000000java-design-patterns-1.18.0/lazy-loading/src/test/java/000077500000000000000000000000001322244523500227125ustar00rootroot00000000000000java-design-patterns-1.18.0/lazy-loading/src/test/java/com/000077500000000000000000000000001322244523500234705ustar00rootroot00000000000000java-design-patterns-1.18.0/lazy-loading/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500253205ustar00rootroot00000000000000java-design-patterns-1.18.0/lazy-loading/src/test/java/com/iluwatar/lazy/000077500000000000000000000000001322244523500262775ustar00rootroot00000000000000java-design-patterns-1.18.0/lazy-loading/src/test/java/com/iluwatar/lazy/loading/000077500000000000000000000000001322244523500277145ustar00rootroot00000000000000AbstractHolderTest.java000066400000000000000000000044621322244523500342470ustar00rootroot00000000000000java-design-patterns-1.18.0/lazy-loading/src/test/java/com/iluwatar/lazy/loading/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.lazy.loading; import org.junit.jupiter.api.Test; import static java.time.Duration.ofMillis; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertNull; import static org.junit.jupiter.api.Assertions.assertSame; import static org.junit.jupiter.api.Assertions.assertTimeout; /** * Date: 12/19/15 - 11:58 AM * * @author Jeroen Meulemeester */ public abstract class AbstractHolderTest { /** * Get the internal state of the holder value * * @return The internal value */ abstract Heavy getInternalHeavyValue() throws Exception; /** * Request a lazy loaded {@link Heavy} object from the holder. * * @return The lazy loaded {@link Heavy} object */ abstract Heavy getHeavy() throws Exception; /** * This test shows that the heavy field is not instantiated until the method getHeavy is called */ @Test public void testGetHeavy() throws Exception { assertTimeout(ofMillis(3000), () -> { assertNull(getInternalHeavyValue()); assertNotNull(getHeavy()); assertNotNull(getInternalHeavyValue()); assertSame(getHeavy(), getInternalHeavyValue()); }); } } java-design-patterns-1.18.0/lazy-loading/src/test/java/com/iluwatar/lazy/loading/AppTest.java000066400000000000000000000025151322244523500321420ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.lazy.loading; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } HolderNaiveTest.java000066400000000000000000000032431322244523500335420ustar00rootroot00000000000000java-design-patterns-1.18.0/lazy-loading/src/test/java/com/iluwatar/lazy/loading/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.lazy.loading; import java.lang.reflect.Field; /** * Date: 12/19/15 - 12:05 PM * * @author Jeroen Meulemeester */ public class HolderNaiveTest extends AbstractHolderTest { private final HolderNaive holder = new HolderNaive(); @Override Heavy getInternalHeavyValue() throws Exception { final Field holderField = HolderNaive.class.getDeclaredField("heavy"); holderField.setAccessible(true); return (Heavy) holderField.get(this.holder); } @Override Heavy getHeavy() { return holder.getHeavy(); } }HolderThreadSafeTest.java000066400000000000000000000033151322244523500345060ustar00rootroot00000000000000java-design-patterns-1.18.0/lazy-loading/src/test/java/com/iluwatar/lazy/loading/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.lazy.loading; import java.lang.reflect.Field; /** * Date: 12/19/15 - 12:19 PM * * @author Jeroen Meulemeester */ public class HolderThreadSafeTest extends AbstractHolderTest { private final HolderThreadSafe holder = new HolderThreadSafe(); @Override Heavy getInternalHeavyValue() throws Exception { final Field holderField = HolderThreadSafe.class.getDeclaredField("heavy"); holderField.setAccessible(true); return (Heavy) holderField.get(this.holder); } @Override Heavy getHeavy() throws Exception { return this.holder.getHeavy(); } }Java8HolderTest.java000066400000000000000000000043631322244523500334550ustar00rootroot00000000000000java-design-patterns-1.18.0/lazy-loading/src/test/java/com/iluwatar/lazy/loading/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.lazy.loading; import java.lang.reflect.Field; import java.util.function.Supplier; /** * Date: 12/19/15 - 12:27 PM * * @author Jeroen Meulemeester */ public class Java8HolderTest extends AbstractHolderTest { private final Java8Holder holder = new Java8Holder(); @Override Heavy getInternalHeavyValue() throws Exception { final Field holderField = Java8Holder.class.getDeclaredField("heavy"); holderField.setAccessible(true); final Supplier supplier = (Supplier) holderField.get(this.holder); final Class supplierClass = supplier.getClass(); // This is a little fishy, but I don't know another way to test this: // The lazy holder is at first a lambda, but gets replaced with a new supplier after loading ... if (supplierClass.isLocalClass()) { final Field instanceField = supplierClass.getDeclaredField("heavyInstance"); instanceField.setAccessible(true); return (Heavy) instanceField.get(supplier); } else { return null; } } @Override Heavy getHeavy() throws Exception { return holder.getHeavy(); } }java-design-patterns-1.18.0/marker/000077500000000000000000000000001322244523500171125ustar00rootroot00000000000000java-design-patterns-1.18.0/marker/.gitignore000066400000000000000000000000111322244523500210720ustar00rootroot00000000000000/target/ java-design-patterns-1.18.0/marker/README.md000066400000000000000000000015761322244523500204020ustar00rootroot00000000000000--- layout: pattern title: Marker Interface folder: marker permalink: /patterns/marker/ categories: Other tags: - Java - Difficulty-Beginner --- ## Intent Using empty interfaces as markers to distinguish special treated objects. ![alt text](./etc/MarkerDiagram.png "Marker Interface") ## Applicability Use the Marker Interface pattern when * you want to identify the special objects from normal objects (to treat them differently) * you want to mark that some object is available for certain sort of operations ## Real world examples * [javase.8.docs.api.java.io.Serializable](https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html) * [javase.8.docs.api.java.lang.Cloneable](https://docs.oracle.com/javase/8/docs/api/java/lang/Cloneable.html) ## Credits * [Effective Java 2nd Edition by Joshua Bloch](https://www.amazon.com/Effective-Java-2nd-Joshua-Bloch/dp/0321356683) java-design-patterns-1.18.0/marker/etc/000077500000000000000000000000001322244523500176655ustar00rootroot00000000000000java-design-patterns-1.18.0/marker/etc/MarkerDiagram.png000066400000000000000000000144751322244523500231140ustar00rootroot00000000000000PNG  IHDR{nIDATxo}W^EҺ&~r mU%8- FO.%fMMG+| 1>;;lQ6Nc#J )ZhPwl333<33|?zt}g>yZ :@'Nß$P]K'jH^rtIЩ@']tI*t%A N5dml Йmm`NFmVN?4רt(dXA݅5qʴk9nMԍ8>4"z]vޮi4Fjf-}BFsS)H'jߡvub݈Z S͕nT/p蝢bSҎ {Z C:%h^kLT%|w#^]htkI:dTX+Qhc!ByN_NɱeLGP\,̀:#$x?z E3{ ~Y es*B;eSitd|N:钠SN$T. :UKN:钠SB7_}~bbo:N˔}C':=dݧg$ZWġHbș[C#ˋOIL9;T']]M@ʣRw Mmů{m 7XΙ ޫFN@Ntw4Rz;+zPot t~*pF X͆7=f7C|nߦ?ЄHTT'y m[tKq^~kJTN~qe6Z l3]o;8@G *Jn[c6=qUSrV\|Kʿ᪣;6?#

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* Marker interface vs annotation * Marker interfaces and marker annotations both have their uses, * neither of them is obsolete or always better then the other one. * If you want to define a type that does not have any new methods associated with it, * a marker interface is the way to go. * If you want to mark program elements other than classes and interfaces, * to allow for the possibility of adding more information to the marker in the future, * or to fit the marker into a framework that already makes heavy use of annotation types, * then a marker annotation is the correct choice */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { final Logger logger = LoggerFactory.getLogger(App.class); Guard guard = new Guard(); Thief thief = new Thief(); if (guard instanceof Permission) { guard.enter(); } else { logger.info("You have no permission to enter, please leave this area"); } if (thief instanceof Permission) { thief.steal(); } else { thief.doNothing(); } } } java-design-patterns-1.18.0/marker/src/main/java/Guard.java000066400000000000000000000026231322244523500234560ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Class defining Guard */ public class Guard implements Permission { private static final Logger LOGGER = LoggerFactory.getLogger(Guard.class); protected static void enter() { LOGGER.info("You can enter"); } } java-design-patterns-1.18.0/marker/src/main/java/Permission.java000066400000000000000000000023551322244523500245460ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ /** * Interface without any methods * Marker interface is based on that assumption */ public interface Permission { } java-design-patterns-1.18.0/marker/src/main/java/Thief.java000066400000000000000000000027521322244523500234560ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Class defining Thief */ public class Thief { private static final Logger LOGGER = LoggerFactory.getLogger(Thief.class); protected static void steal() { LOGGER.info("Steal valuable items"); } protected static void doNothing() { LOGGER.info("Pretend nothing happened and just leave"); } } java-design-patterns-1.18.0/marker/src/test/000077500000000000000000000000001322244523500206605ustar00rootroot00000000000000java-design-patterns-1.18.0/marker/src/test/java/000077500000000000000000000000001322244523500216015ustar00rootroot00000000000000java-design-patterns-1.18.0/marker/src/test/java/AppTest.java000066400000000000000000000024361322244523500240310ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ import org.junit.jupiter.api.Test; /** * Application test */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/marker/src/test/java/GuardTest.java000066400000000000000000000026601322244523500243520ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ import org.junit.jupiter.api.Test; import static org.hamcrest.CoreMatchers.instanceOf; import static org.hamcrest.MatcherAssert.assertThat; /** * Guard test */ public class GuardTest { @Test public void testGuard() { Guard guard = new Guard(); assertThat(guard, instanceOf(Permission.class)); } }java-design-patterns-1.18.0/marker/src/test/java/ThiefTest.java000066400000000000000000000025731322244523500243520ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertFalse; /** * Thief test */ public class ThiefTest { @Test public void testThief() { Thief thief = new Thief(); assertFalse(thief instanceof Permission); } }java-design-patterns-1.18.0/mediator/000077500000000000000000000000001322244523500174355ustar00rootroot00000000000000java-design-patterns-1.18.0/mediator/README.md000066400000000000000000000033511322244523500207160ustar00rootroot00000000000000--- layout: pattern title: Mediator folder: mediator permalink: /patterns/mediator/ categories: Behavioral tags: - Java - Gang Of Four - Difficulty-Intermediate --- ## Intent Define an object that encapsulates how a set of objects interact. Mediator promotes loose coupling by keeping objects from referring to each other explicitly, and it lets you vary their interaction independently. ![alt text](./etc/mediator_1.png "Mediator") ## Applicability Use the Mediator pattern when * a set of objects communicate in well-defined but complex ways. The resulting interdependencies are unstructured and difficult to understand * reusing an object is difficult because it refers to and communicates with many other objects * a behavior that's distributed between several classes should be customizable without a lot of subclassing ## Real world examples * All scheduleXXX() methods of [java.util.Timer](http://docs.oracle.com/javase/8/docs/api/java/util/Timer.html) * [java.util.concurrent.Executor#execute()](http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Executor.html#execute-java.lang.Runnable-) * submit() and invokeXXX() methods of [java.util.concurrent.ExecutorService](http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html) * scheduleXXX() methods of [java.util.concurrent.ScheduledExecutorService](http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ScheduledExecutorService.html) * [java.lang.reflect.Method#invoke()](http://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Method.html#invoke-java.lang.Object-java.lang.Object...-) ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.18.0/mediator/etc/000077500000000000000000000000001322244523500202105ustar00rootroot00000000000000java-design-patterns-1.18.0/mediator/etc/mediator.png000066400000000000000000001101241322244523500225210ustar00rootroot00000000000000PNG  IHDRKF<IDATx{$W}Ya a{;o!h E@=!%cXnZbeYzi%Z3T3DpB- A11H-YF= ;߈C7{ico4G_q *;A5  N;Yn[MÔȾϵw˰0/ȍ`zOjwr̴ee( ES80VFT2'ˡ}A*fὼɶZpV±+N,ʶjhtS#J^\'U6)%"J}D5gԍ;"ܙqPA2 paFҀg'(x2 W| Ohmv>hE۞/L^#/D_?j?\OhRc‹:vf\2bb(x5584I%6_ < I >3oR K^)RPo60dQc!_nY $ '“Ҁg'x>1F SnZ:=B(69^H`Fiԉ{F5aԲ$12J1HLAN*&\٠PA2` * xvRO4z R `pPi |Ic6(e0b JTM2IQZ?|ں\ 6b a * xvRO4z&Ni}[z{>;{f:{mӉgIпegTXdm`pPi>_z>7}cmzfdi=ϒi>vho7R |, 婂9<;$l{cW2̿ gK|3*)z&}kw>'Ͻ7ÛC0.OBepƯͭCm‡ R CϷX&a=Yw^wsIUA T줢O$s7l"׍ĉp<<;g^fL|w?KaU7L~0c;>~ Vus{dD+f庇^zCaF? ζ'K0,*8nAذ4 J%+zsai`i|*vֿs礊}ԏ Tpܫo?%F):ﶟ>ǼIu|ŐuAϵz s9:-;1c)1xvR'>p;|"c GN?HrCbl؅;"nOXPE0B֪1*XE^)"a( oq=-vkbcYXǾGo&71m8ˎY[{u=U@1Nn>3o\?בzٛ?{ojgr}(C.JsV>Eiz&һW;ߦe]~ڳd|5:{r_țBYME<v9uZ&_yV*?0=?}qK=a|Bdnol:p,%* ӠyMQފX*AN*ny玼6^8Wm8)ѕN`8x/1G]vz?>tƟtAs5+ʼnߞi A8x۶cWC؝Ky}"Z~ }y7f?Ћhnơpv OdQAT4{ecшʔu+/p:uVK"PA Hh9epPin>jj}dLtlϏS0tGޛl"J|헽o?={)?Oqk 4{L4cbs57G5nxuo0gpzq7ʞ9}tF7ڠLm>YG K-B8|࠼0! 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mediator; /** * * Action enumeration. * */ public enum Action { HUNT("hunted a rabbit", "arrives for dinner"), TALE("tells a tale", "comes to listen"), GOLD( "found gold", "takes his share of the gold"), ENEMY("spotted enemies", "runs for cover"), NONE( "", ""); private String title; private String description; Action(String title, String description) { this.title = title; this.description = description; } public String getDescription() { return description; } public String toString() { return title; } } java-design-patterns-1.18.0/mediator/src/main/java/com/iluwatar/mediator/App.java000066400000000000000000000060371322244523500276740ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mediator; /** * * The Mediator pattern defines an object that encapsulates how a set of objects interact. This * pattern is considered to be a behavioral pattern due to the way it can alter the program's * running behavior. *

* Usually a program is made up of a large number of classes. So the logic and computation is * distributed among these classes. However, as more classes are developed in a program, especially * during maintenance and/or refactoring, the problem of communication between these classes may * become more complex. This makes the program harder to read and maintain. Furthermore, it can * become difficult to change the program, since any change may affect code in several other * classes. *

* With the Mediator pattern, communication between objects is encapsulated with a mediator object. * Objects no longer communicate directly with each other, but instead communicate through the * mediator. This reduces the dependencies between communicating objects, thereby lowering the * coupling. *

* In this example the mediator encapsulates how a set of objects ({@link PartyMember}) interact. * Instead of referring to each other directly they use the mediator ({@link Party}) interface. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { // create party and members Party party = new PartyImpl(); Hobbit hobbit = new Hobbit(); Wizard wizard = new Wizard(); Rogue rogue = new Rogue(); Hunter hunter = new Hunter(); // add party members party.addMember(hobbit); party.addMember(wizard); party.addMember(rogue); party.addMember(hunter); // perform actions -> the other party members // are notified by the party hobbit.act(Action.ENEMY); wizard.act(Action.TALE); rogue.act(Action.GOLD); hunter.act(Action.HUNT); } } java-design-patterns-1.18.0/mediator/src/main/java/com/iluwatar/mediator/Hobbit.java000066400000000000000000000025311322244523500303560ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mediator; /** * * Hobbit party member. * */ public class Hobbit extends PartyMemberBase { @Override public String toString() { return "Hobbit"; } } java-design-patterns-1.18.0/mediator/src/main/java/com/iluwatar/mediator/Hunter.java000066400000000000000000000025271322244523500304210ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mediator; /** * * Hunter party member. * */ public class Hunter extends PartyMemberBase { @Override public String toString() { return "Hunter"; } } java-design-patterns-1.18.0/mediator/src/main/java/com/iluwatar/mediator/Party.java000066400000000000000000000025231322244523500302470ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mediator; /** * * Party interface. * */ public interface Party { void addMember(PartyMember member); void act(PartyMember actor, Action action); } java-design-patterns-1.18.0/mediator/src/main/java/com/iluwatar/mediator/PartyImpl.java000066400000000000000000000033741322244523500310760ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mediator; import java.util.ArrayList; import java.util.List; /** * * Party implementation. * */ public class PartyImpl implements Party { private final List members; public PartyImpl() { members = new ArrayList<>(); } @Override public void act(PartyMember actor, Action action) { for (PartyMember member : members) { if (!member.equals(actor)) { member.partyAction(action); } } } @Override public void addMember(PartyMember member) { members.add(member); member.joinedParty(this); } } java-design-patterns-1.18.0/mediator/src/main/java/com/iluwatar/mediator/PartyMember.java000066400000000000000000000025531322244523500314020ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mediator; /** * * Interface for party members interacting with {@link Party}. * */ public interface PartyMember { void joinedParty(Party party); void partyAction(Action action); void act(Action action); } java-design-patterns-1.18.0/mediator/src/main/java/com/iluwatar/mediator/PartyMemberBase.java000066400000000000000000000036771322244523500322050ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mediator; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Abstract base class for party members. * */ public abstract class PartyMemberBase implements PartyMember { private static final Logger LOGGER = LoggerFactory.getLogger(PartyMemberBase.class); protected Party party; @Override public void joinedParty(Party party) { LOGGER.info("{} joins the party", this); this.party = party; } @Override public void partyAction(Action action) { LOGGER.info("{} {}", this, action.getDescription()); } @Override public void act(Action action) { if (party != null) { LOGGER.info("{} {}", this, action); party.act(this, action); } } @Override public abstract String toString(); } java-design-patterns-1.18.0/mediator/src/main/java/com/iluwatar/mediator/Rogue.java000066400000000000000000000025261322244523500302340ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mediator; /** * * Rogue party member. * */ public class Rogue extends PartyMemberBase { @Override public String toString() { return "Rogue"; } } java-design-patterns-1.18.0/mediator/src/main/java/com/iluwatar/mediator/Wizard.java000066400000000000000000000025311322244523500304070ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mediator; /** * * Wizard party member. * */ public class Wizard extends PartyMemberBase { @Override public String toString() { return "Wizard"; } } java-design-patterns-1.18.0/mediator/src/test/000077500000000000000000000000001322244523500212035ustar00rootroot00000000000000java-design-patterns-1.18.0/mediator/src/test/java/000077500000000000000000000000001322244523500221245ustar00rootroot00000000000000java-design-patterns-1.18.0/mediator/src/test/java/com/000077500000000000000000000000001322244523500227025ustar00rootroot00000000000000java-design-patterns-1.18.0/mediator/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500245325ustar00rootroot00000000000000java-design-patterns-1.18.0/mediator/src/test/java/com/iluwatar/mediator/000077500000000000000000000000001322244523500263365ustar00rootroot00000000000000java-design-patterns-1.18.0/mediator/src/test/java/com/iluwatar/mediator/AppTest.java000066400000000000000000000025111322244523500305600ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mediator; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/mediator/src/test/java/com/iluwatar/mediator/PartyImplTest.java000066400000000000000000000043431322244523500317660ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mediator; import org.junit.jupiter.api.Test; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/19/15 - 10:00 PM * * @author Jeroen Meulemeester */ public class PartyImplTest { /** * Verify if a member is notified when it's joining a party. Generate an action and see if the * other member gets it. Also check members don't get their own actions. */ @Test public void testPartyAction() { final PartyMember partyMember1 = mock(PartyMember.class); final PartyMember partyMember2 = mock(PartyMember.class); final PartyImpl party = new PartyImpl(); party.addMember(partyMember1); party.addMember(partyMember2); verify(partyMember1).joinedParty(party); verify(partyMember2).joinedParty(party); party.act(partyMember1, Action.GOLD); verifyZeroInteractions(partyMember1); verify(partyMember2).partyAction(Action.GOLD); verifyNoMoreInteractions(partyMember1, partyMember2); } } java-design-patterns-1.18.0/mediator/src/test/java/com/iluwatar/mediator/PartyMemberTest.java000066400000000000000000000110601322244523500322660ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mediator; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.params.ParameterizedTest; import org.junit.jupiter.params.provider.MethodSource; import org.slf4j.LoggerFactory; import java.util.Arrays; import java.util.Collection; import java.util.LinkedList; import java.util.List; import java.util.function.Supplier; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; /** * Date: 12/19/15 - 10:13 PM * * @author Jeroen Meulemeester */ public class PartyMemberTest { static Collection[]> dataProvider() { return Arrays.asList( new Supplier[]{Hobbit::new}, new Supplier[]{Hunter::new}, new Supplier[]{Rogue::new}, new Supplier[]{Wizard::new} ); } private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(PartyMemberBase.class); } @AfterEach public void tearDown() { appender.stop(); } /** * Verify if a party action triggers the correct output to the std-Out */ @ParameterizedTest @MethodSource("dataProvider") public void testPartyAction(Supplier memberSupplier) { final PartyMember member = memberSupplier.get(); for (final Action action : Action.values()) { member.partyAction(action); assertEquals(member.toString() + " " + action.getDescription(), appender.getLastMessage()); } assertEquals(Action.values().length, appender.getLogSize()); } /** * Verify if a member action triggers the expected interactions with the party class */ @ParameterizedTest @MethodSource("dataProvider") public void testAct(Supplier memberSupplier) { final PartyMember member = memberSupplier.get(); member.act(Action.GOLD); assertEquals(0, appender.getLogSize()); final Party party = mock(Party.class); member.joinedParty(party); assertEquals(member.toString() + " joins the party", appender.getLastMessage()); for (final Action action : Action.values()) { member.act(action); assertEquals(member.toString() + " " + action.toString(), appender.getLastMessage()); verify(party).act(member, action); } assertEquals(Action.values().length + 1, appender.getLogSize()); } /** * Verify if {@link PartyMember#toString()} generate the expected output */ @ParameterizedTest @MethodSource("dataProvider") public void testToString(Supplier memberSupplier) throws Exception { final PartyMember member = memberSupplier.get(); final Class memberClass = member.getClass(); assertEquals(memberClass.getSimpleName(), member.toString()); } private class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender(Class clazz) { ((Logger) LoggerFactory.getLogger(clazz)).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public int getLogSize() { return log.size(); } public String getLastMessage() { return log.get(log.size() - 1).getFormattedMessage(); } } } java-design-patterns-1.18.0/memento/000077500000000000000000000000001322244523500172755ustar00rootroot00000000000000java-design-patterns-1.18.0/memento/README.md000066400000000000000000000016301322244523500205540ustar00rootroot00000000000000--- layout: pattern title: Memento folder: memento permalink: /patterns/memento/ categories: Behavioral tags: - Java - Gang Of Four - Difficulty-Intermediate --- ## Also known as Token ## Intent Without violating encapsulation, capture and externalize an object's internal state so that the object can be restored to this state later. ![alt text](./etc/memento.png "Memento") ## Applicability Use the Memento pattern when * a snapshot of an object's state must be saved so that it can be restored to that state later, and * a direct interface to obtaining the state would expose implementation details and break the object's encapsulation ## Real world examples * [java.util.Date](http://docs.oracle.com/javase/8/docs/api/java/util/Date.html) ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.18.0/memento/etc/000077500000000000000000000000001322244523500200505ustar00rootroot00000000000000java-design-patterns-1.18.0/memento/etc/memento.png000066400000000000000000000537341322244523500222360ustar00rootroot00000000000000PNG  IHDRKWIDATx{GaOm*UU*rRr8PD"ٲ$`kaX?~\98Ƭñ6 a֒D8dJjMح2 $h7)T=wOy|_}%;g>ӿ3hAVbAV AUhƳFԠ)W~ T!r`1\qE.nͲHI{~ʅ[hCACUe_oEX!|li:8]G bIՎcb ]%Tf<ʑчAl0.λxu'ӻ (*7b\A (S Uezw)xY:+lZ^ BA3VB B B B B B BݣWpQY yϋ_m]Z^6M#.9dCT4ҳq Tb r` Ezy}~oysK˯_Wgٍˣ  PRo_s]|6/yMHxʬ 38\&UڼPNy}{>S˫   n   n   n   n   n   n   n   n  ĺtV]"fg rek*A(A}$T9W1kt=WN6 u2_^)KcXՊ}w%xN rPlRpDFƈdaĕlnJφTI~Y"!{M0\+uҾޘ]\Y/M "'< U\S݆.ѡW,pJم\ǐy$A9B)WBe reĞ}jB1}2|h qqb# t+KPR PU;6Pơ&eJP}6?GqP1 HIi5ezxn})4Bv\UA(A~wdTʮ籒&GBI_Naeվ.z-o&F/\˫  ?BUZ9  rm396}.Pd rPͽ< BA BA BA BA BAj/yu^4 BAj/JGGA(A T_ yedS|,̌"oS©@^87dpN\N~܌n rP%Zҹk:E)a2@\$ͶTIrMmjf~]D2 S8Nڤ+ r Y41aL\khM"5:hk P3ke0&eЪ \ T ]˫"6Sg1dXCs2&P%.ky3yeDn    n   n   n   n   n  NAP"\yPPFhCz6d/ n   n  B߶v/͟z ':QP 26CEA(Ab>\h r7hzA2ME6~bQ"kzd BA%O.d~t'lTmF /R} {  u~zz2y1WKR2 `۔}Cª|Cg BA2G?yo~+_G^e0 ]YQ߄^Yg4I#ՒlRm՞o%LLLw=]ⶓ8WfW}J Pt_|x_ ,֤O+ఢ 3ϤJ$!)J6h^h2-ӫ>|^N BAziם/ߙ{v',ԟyV*ƌT{lSPyJB5k^)u`q BA\|+7=uKɿG+6\|4W0,M ,놴x)L(g8~ -܃Wy~vNd!{L*BlSrb؆R090R ?p큗 TF7{,P ,26 3`)@`їRN^ TY=eU!(2ɮA99JG(M=zL)/ {W^q)JNh3K'#UℒHdҒ4:t3皅LiMiI!7 |9BA*c3@J)[R&2k*S.gMY1m(wPtdl*PI(e#8M)oS©۝Q7t?Cd Լ:ct 1EӜ/v-ϼ$Z]|w)OWц BA2jh~(879]=pn r%FT= Pp Pp Pp Pp Pp E uMM<aVՅ29;R BAjPm֛„MF)8J)Q! 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.memento; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.Stack; /** * * The Memento pattern is a software design pattern that provides the ability to restore an object * to its previous state (undo via rollback). *

* The Memento pattern is implemented with three objects: the originator, a caretaker and a memento. * The originator is some object that has an internal state. The caretaker is going to do something * to the originator, but wants to be able to undo the change. The caretaker first asks the * originator for a memento object. Then it does whatever operation (or sequence of operations) it * was going to do. To roll back to the state before the operations, it returns the memento object * to the originator. The memento object itself is an opaque object (one which the caretaker cannot, * or should not, change). When using this pattern, care should be taken if the originator may * change other objects or resources - the memento pattern operates on a single object. *

* In this example the object ({@link Star}) gives out a "memento" ({@link StarMemento}) that * contains the state of the object. Later on the memento can be set back to the object restoring * the state. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point */ public static void main(String[] args) { Stack states = new Stack<>(); Star star = new Star(StarType.SUN, 10000000, 500000); LOGGER.info(star.toString()); states.add(star.getMemento()); star.timePasses(); LOGGER.info(star.toString()); states.add(star.getMemento()); star.timePasses(); LOGGER.info(star.toString()); states.add(star.getMemento()); star.timePasses(); LOGGER.info(star.toString()); states.add(star.getMemento()); star.timePasses(); LOGGER.info(star.toString()); while (states.size() > 0) { star.setMemento(states.pop()); LOGGER.info(star.toString()); } } } java-design-patterns-1.18.0/memento/src/main/java/com/iluwatar/memento/Star.java000066400000000000000000000062731322244523500275670ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.memento; /** * * Star uses "mementos" to store and restore state. * */ public class Star { private StarType type; private int ageYears; private int massTons; /** * Constructor */ public Star(StarType startType, int startAge, int startMass) { this.type = startType; this.ageYears = startAge; this.massTons = startMass; } /** * Makes time pass for the star */ public void timePasses() { ageYears *= 2; massTons *= 8; switch (type) { case RED_GIANT: type = StarType.WHITE_DWARF; break; case SUN: type = StarType.RED_GIANT; break; case SUPERNOVA: type = StarType.DEAD; break; case WHITE_DWARF: type = StarType.SUPERNOVA; break; case DEAD: ageYears *= 2; massTons = 0; break; default: break; } } StarMemento getMemento() { StarMementoInternal state = new StarMementoInternal(); state.setAgeYears(ageYears); state.setMassTons(massTons); state.setType(type); return state; } void setMemento(StarMemento memento) { StarMementoInternal state = (StarMementoInternal) memento; this.type = state.getType(); this.ageYears = state.getAgeYears(); this.massTons = state.getMassTons(); } @Override public String toString() { return String.format("%s age: %d years mass: %d tons", type.toString(), ageYears, massTons); } /** * * StarMemento implementation * */ private static class StarMementoInternal implements StarMemento { private StarType type; private int ageYears; private int massTons; public StarType getType() { return type; } public void setType(StarType type) { this.type = type; } public int getAgeYears() { return ageYears; } public void setAgeYears(int ageYears) { this.ageYears = ageYears; } public int getMassTons() { return massTons; } public void setMassTons(int massTons) { this.massTons = massTons; } } } java-design-patterns-1.18.0/memento/src/main/java/com/iluwatar/memento/StarMemento.java000066400000000000000000000024141322244523500311050ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.memento; /** * * External interface to memento. * */ public interface StarMemento { } java-design-patterns-1.18.0/memento/src/main/java/com/iluwatar/memento/StarType.java000066400000000000000000000027551322244523500304320ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.memento; /** * * StarType enumeration * */ public enum StarType { SUN("sun"), RED_GIANT("red giant"), WHITE_DWARF("white dwarf"), SUPERNOVA("supernova"), DEAD( "dead star"), UNDEFINED(""); private String title; StarType(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.18.0/memento/src/test/000077500000000000000000000000001322244523500210435ustar00rootroot00000000000000java-design-patterns-1.18.0/memento/src/test/java/000077500000000000000000000000001322244523500217645ustar00rootroot00000000000000java-design-patterns-1.18.0/memento/src/test/java/com/000077500000000000000000000000001322244523500225425ustar00rootroot00000000000000java-design-patterns-1.18.0/memento/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500243725ustar00rootroot00000000000000java-design-patterns-1.18.0/memento/src/test/java/com/iluwatar/memento/000077500000000000000000000000001322244523500260365ustar00rootroot00000000000000java-design-patterns-1.18.0/memento/src/test/java/com/iluwatar/memento/AppTest.java000066400000000000000000000025101322244523500302570ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.memento; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/memento/src/test/java/com/iluwatar/memento/StarTest.java000066400000000000000000000064631322244523500304630ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.memento; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Date: 12/20/15 - 10:08 AM * * @author Jeroen Meulemeester */ public class StarTest { /** * Verify the stages of a dying sun, without going back in time */ @Test public void testTimePasses() { final Star star = new Star(StarType.SUN, 1, 2); assertEquals("sun age: 1 years mass: 2 tons", star.toString()); star.timePasses(); assertEquals("red giant age: 2 years mass: 16 tons", star.toString()); star.timePasses(); assertEquals("white dwarf age: 4 years mass: 128 tons", star.toString()); star.timePasses(); assertEquals("supernova age: 8 years mass: 1024 tons", star.toString()); star.timePasses(); assertEquals("dead star age: 16 years mass: 8192 tons", star.toString()); star.timePasses(); assertEquals("dead star age: 64 years mass: 0 tons", star.toString()); star.timePasses(); assertEquals("dead star age: 256 years mass: 0 tons", star.toString()); } /** * Verify some stage of a dying sun, but go back in time to test the memento */ @Test public void testSetMemento() { final Star star = new Star(StarType.SUN, 1, 2); final StarMemento firstMemento = star.getMemento(); assertEquals("sun age: 1 years mass: 2 tons", star.toString()); star.timePasses(); final StarMemento secondMemento = star.getMemento(); assertEquals("red giant age: 2 years mass: 16 tons", star.toString()); star.timePasses(); final StarMemento thirdMemento = star.getMemento(); assertEquals("white dwarf age: 4 years mass: 128 tons", star.toString()); star.timePasses(); assertEquals("supernova age: 8 years mass: 1024 tons", star.toString()); star.setMemento(thirdMemento); assertEquals("white dwarf age: 4 years mass: 128 tons", star.toString()); star.timePasses(); assertEquals("supernova age: 8 years mass: 1024 tons", star.toString()); star.setMemento(secondMemento); assertEquals("red giant age: 2 years mass: 16 tons", star.toString()); star.setMemento(firstMemento); assertEquals("sun age: 1 years mass: 2 tons", star.toString()); } } java-design-patterns-1.18.0/message-channel/000077500000000000000000000000001322244523500206635ustar00rootroot00000000000000java-design-patterns-1.18.0/message-channel/.gitignore000066400000000000000000000000111322244523500226430ustar00rootroot00000000000000/target/ java-design-patterns-1.18.0/message-channel/README.md000066400000000000000000000011361322244523500221430ustar00rootroot00000000000000--- layout: pattern title: Message Channel folder: message-channel permalink: /patterns/message-channel/ categories: Integration tags: - Java - EIP - Apache Camel™ --- ## Intent When two applications communicate using a messaging system they do it by using logical addresses of the system, so called Message Channels. ![alt text](./etc/message-channel.png "Message Channel") ## Applicability Use the Message Channel pattern when * two or more applications need to communicate using a messaging system ## Real world examples * [akka-camel](http://doc.akka.io/docs/akka/snapshot/scala/camel.html) java-design-patterns-1.18.0/message-channel/etc/000077500000000000000000000000001322244523500214365ustar00rootroot00000000000000java-design-patterns-1.18.0/message-channel/etc/message-channel.png000066400000000000000000001341601322244523500252030ustar00rootroot00000000000000PNG  IHDR'<87IDATxmkW}7{GWWΛo#:T3V91R ԁBNkpӓ'0V& z"*L4UJEf^{`{O#k-%39SQ./T'] ?HBРAz@uTH뽌ayAI,YA@YCgt#4XF遲SA!Fh$d e˟ICHb "L*?Ē54HE :T^usD !V Hh =Pa* ԡF{a]t1:i54}44HEu>эp=Jt0k\<~=F' 1F/F遲S5;\{:mzٮ0O"'侨exq8\4HI<4}4h(0YP#ذ1vzWU7;&F2]4BIlmmU* ucFTackg4|ϴN(0+oXCW}_sT3y+ŹZcqͺ(Y_Q\ck#(eW?Q?cV*![p'[ΎV LHT37Dq%'_4 <,T:>_?zk̋|wI^ܰáƕ6W%To8uYT>hpݣm̊PW/j׵KBf^i[YM:ೌ1^7ob/g`6>H(۩ݒIfRJ4 wj,~nO3)B7n\Go]_g jSQrv?_i^{7} &/ͯM77,;ug#sE^!|ӜGBR*`4]#GT%[[b]c!Rch_H-Já(F7\F d%y}tgqwAf^砭ͼ6>W8enKXZ|qUzuHIns}MU)js6A Zl hez59x,BFpubcŃdP{Yo]5l[G>TW%xV^i_17<+]wjL^ɛqejPLo{YRi:i̫(@1)MH{>NRe?~͈jUQj/fC D~X4F ĖpPŃ¯CfwYNښy0ӊe֍$M)@̋Kur) AC}P1:`*fܡİܠ:0S G<֡Z82|bBu:Wwΐi 1цT֪q1 EK@!sCgI,YvfJTvw( ܣIbj{X :W :T,ĒfXL+L*?Cu@Hb+L*?Cu@Hb+L*?Cu@HbZ@SkՠXYYQնE~$]9pйTC2ڿoK_9רXWFµ? 8RO}r6!43vKHiIw>7ڪj w*44b$Fn_Wnu +LEBjT:3 \<[VPrus轝UX!G_*Ahy8q<5WuaWgHFTW2-4b$FOo^x;cuuU,--ɋ˗/ommC`nйT[uuS!YahTWl[F!݌~ї[+='k+rS*~B|Q}?SL: Fh$ihlfY.www QZMy+ъ"ժЏ:W7zdZ' ՟:B:"ƙo$\E2=L~w14b$FϧA_YY8991TB!Hl|κr~2ju/Ji4z_ u6h LEUf)R{rCjUsk.Xiw_MnL1F 1H#IGܠy=h`P`*R:"%2 и4?nآO F.z'g9 2R+Iwэb$F/Ak6JE+BSz٢ X.b$$M_-bFsBS5FO7F 1F@@!HeaS/$:GэXp&P0\a*PbFKUPnX/P: :W :T,Ē1U` #jXh0QsCgI,YOu8@|8vwB S@Rtł@# A+M:: p夳y鬯w_wuNNN$u]֩jfS>{19 %ftj?}l@/..nmm{jjI0;aR( D~N @f`&튯_TbV<+|UzUpȓ%on;z%:myyY fDiCP T@!bC|\qtƽKIϵkDKnZz]a9;! 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+!F*7>}ޗg60dRkw<*u 2|vw}e89Ns5:©[eBjn}E0d&we\]TL/ZVs7=/|xA-qG q?:3;%cow#ߌpס}r\Y)o:o #ԫL_-$aVNb.Tiz$⼮כv\+T<2Ճ@ZT'Å5U'i#g]{ˣP݇Huk.a/ʐ&9:CXlǰBo$0rSknD/'aKnܴ\G]eHPbqǠ b:d Èo[}Dٵk2w1*N̷\G[eHPbyC5bZsa^d,Uo/յ|$}EB¦{Ox3eܸњlugsTQDndY%pAL}_I>a:JL^#3m+4/g<u8ͦ>5潸F3OB5+C|8U$O2q%&?;N\Sމ)D*U$O:'I_bQT{gp4"Dw\GU<Ŝ$}EQ]s:ʔ"'I_bA0#L)r(tc:ʔ"'I_bA0#L)r(33Q#,(T+'q.H\8@;IENDB`java-design-patterns-1.18.0/message-channel/etc/message-channel.ucls000066400000000000000000000436021322244523500253650ustar00rootroot00000000000000 java-design-patterns-1.18.0/message-channel/pom.xml000066400000000000000000000041401322244523500221770ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 message-channel org.apache.camel camel-core org.apache.camel camel-stream org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/message-channel/src/000077500000000000000000000000001322244523500214525ustar00rootroot00000000000000java-design-patterns-1.18.0/message-channel/src/main/000077500000000000000000000000001322244523500223765ustar00rootroot00000000000000java-design-patterns-1.18.0/message-channel/src/main/java/000077500000000000000000000000001322244523500233175ustar00rootroot00000000000000java-design-patterns-1.18.0/message-channel/src/main/java/com/000077500000000000000000000000001322244523500240755ustar00rootroot00000000000000java-design-patterns-1.18.0/message-channel/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500257255ustar00rootroot00000000000000java-design-patterns-1.18.0/message-channel/src/main/java/com/iluwatar/message/000077500000000000000000000000001322244523500273515ustar00rootroot00000000000000java-design-patterns-1.18.0/message-channel/src/main/java/com/iluwatar/message/channel/000077500000000000000000000000001322244523500307615ustar00rootroot00000000000000java-design-patterns-1.18.0/message-channel/src/main/java/com/iluwatar/message/channel/App.java000066400000000000000000000064351322244523500323540ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.message.channel; import org.apache.camel.CamelContext; import org.apache.camel.builder.RouteBuilder; import org.apache.camel.impl.DefaultCamelContext; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * When two applications communicate with each other using a messaging system they first need to * establish a communication channel that will carry the data. Message Channel decouples Message * producers and consumers. *

* The sending application doesn't necessarily know what particular application will end up * retrieving it, but it can be assured that the application that retrieves the information is * interested in that information. This is because the messaging system has different Message * Channels for different types of information the applications want to communicate. When an * application sends information, it doesn't randomly add the information to any channel available; * it adds it to a channel whose specific purpose is to communicate that sort of information. * Likewise, an application that wants to receive particular information doesn't pull info off some * random channel; it selects what channel to get information from based on what type of information * it wants. *

* In this example we use Apache Camel to establish two different Message Channels. The first one * reads from standard input and delivers messages to Direct endpoint. The second Message Channel is * established from the Direct component to console output. No actual messages are sent, only the * established routes are printed to standard output. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point */ public static void main(String[] args) throws Exception { CamelContext context = new DefaultCamelContext(); context.addRoutes(new RouteBuilder() { @Override public void configure() throws Exception { from("stream:in").to("direct:greetings"); from("direct:greetings").to("stream:out"); } }); context.start(); context.getRoutes().stream().forEach(r -> LOGGER.info(r.toString())); context.stop(); } } java-design-patterns-1.18.0/message-channel/src/test/000077500000000000000000000000001322244523500224315ustar00rootroot00000000000000java-design-patterns-1.18.0/message-channel/src/test/java/000077500000000000000000000000001322244523500233525ustar00rootroot00000000000000java-design-patterns-1.18.0/message-channel/src/test/java/com/000077500000000000000000000000001322244523500241305ustar00rootroot00000000000000java-design-patterns-1.18.0/message-channel/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500257605ustar00rootroot00000000000000java-design-patterns-1.18.0/message-channel/src/test/java/com/iluwatar/message/000077500000000000000000000000001322244523500274045ustar00rootroot00000000000000java-design-patterns-1.18.0/message-channel/src/test/java/com/iluwatar/message/channel/000077500000000000000000000000001322244523500310145ustar00rootroot00000000000000java-design-patterns-1.18.0/message-channel/src/test/java/com/iluwatar/message/channel/AppTest.java000066400000000000000000000025411322244523500332410ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.message.channel; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() throws Exception { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/model-view-controller/000077500000000000000000000000001322244523500220625ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-controller/README.md000066400000000000000000000020201322244523500233330ustar00rootroot00000000000000--- layout: pattern title: Model-View-Controller folder: model-view-controller permalink: /patterns/model-view-controller/ categories: Presentation Tier tags: - Java - Difficulty-Intermediate --- ## Intent Separate the user interface into three interconnected components: the model, the view and the controller. Let the model manage the data, the view display the data and the controller mediate updating the data and redrawing the display. ![alt text](./etc/model-view-controller.png "Model-View-Controller") ## Applicability Use the Model-View-Controller pattern when * you want to clearly separate the domain data from its user interface representation ## Credits * [Trygve Reenskaug - Model-view-controller](http://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93controller) * [J2EE Design Patterns](http://www.amazon.com/J2EE-Design-Patterns-William-Crawford/dp/0596004273/ref=sr_1_2) * [Patterns of Enterprise Application Architecture](http://www.amazon.com/Patterns-Enterprise-Application-Architecture-Martin/dp/0321127420) java-design-patterns-1.18.0/model-view-controller/etc/000077500000000000000000000000001322244523500226355ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-controller/etc/model-view-controller.png000066400000000000000000000433221322244523500276000ustar00rootroot00000000000000PNG  IHDR wdFIDATx]$Wy["ZeZٛ LbE0c3 b4q 68Dmh18(7KV R䐛쭮]N:WVW:էWOz!P ]B #PAu/J]q>TNB$A51oh;+\DK.Ht.:֥NԅB% 1"mC0P4IPM%47ҿ~cv16{-Vuk׆e!ƅnXhm#$#'J-|yָЋBmG($&zyL=Ⱦaw>#9c.:ƅ[KETX_ڃ*vMrjq|*o]Gي jIۆ/BM& {NC(Mqp8uo ls.DYc!^y8E$Yf~<>|yFTdul? #MTO>B$A #MTO>B$A #MTO>B$A #MTO>B$A7~W+>rUܐΖ ^+a}Ij쬿gu#-deIH Gȟ jq{h #MTf}_핧o?}#Om2 #b{o5o-8[7G& oz{֧Ue_G޽8S"${MURaխlcX"MTe>us,vy/o}1{|ٻo}j}KK)(?iG7.|DߢRoB-lZ #MTeo y^|G?/ο>n|o)/QD^7!ejJ/uM%ۊ5^Hu0?xO4IPFKoͱ^yM%_zog^\zU/z^]_t*#a ^Oc\D]QYIR]]{oEYӫXmg˒LK52ExYȝ^rGΫ3?#_x|zO֋Z۹2[[E:VbU&w& z]W߰3ۑ}Ǟt߸3'7Kj4lMc8` <'Pr+^)QIj.ye{wzvomNiW\\خڿEip̃-bog+}/lƱxXMTe}S_%ʏă/'f_/fn]@̈́D;^t1tcjjҶ;7+G݋& ٘Yq\y͙\o:[s5}~!yQ#[1x9R=u/$u>n柽!{K`հ>B$A1n5P4IPz<ES0P4IPz<ES0P4IPz<ES0P4IPz<E˛ 3u¾w[d #MTw #MT^pL ?cU_.P3+Xޯ1]ބc ᎋ4Bh|*||`1YVNװ>B$A+ حPZp`9mj2^X RVlBV/7/w*v: a}I ׉6*;ʇ)Rq7hy랾{г m2(Ϥ5j/ܹ"E-Xhw 'gP &RU3+sXsFϷ礝‹ǽ#9n];ZK& *7=?yU/ĉpov_ߧ'}V;ܻ6:}~"ҿX} ޛᑶG($M_>}d/yj'NՌ 5f_fjRJݯzCnSNFC}|7APZ7^^ -+s)oKP4IPX˗ڇO~+ߗ-Ci,N Z5|X gJO5de}r|+Q.-jжi۵픆^h\΅BEqXו>#MT6m۟(#7[`Wz:cWq-iQVL*UIM pYVZ_ߛ>n$Aec-?yˣoo\ٮ/HacmAbPuhh%H/Di57oC\buC^nڣۮĹSa7wI dS|qX?$Aec|tWNĩ>q*{q'j{wn8R}VFg]&J+m(&j~~뽶7<MT6g;}Cً_jlEg'q7 ksUrs>n+v!o~m+c)m][k6qi6_k#J hr>be¾Zq03q5RٜAzM\6]2oCݲ\Ua|yhc>۷jbmrvJF4IPY[-?4#׏G4IP-LG˃X<7;"$Aw]H|L2P4IPz<ES0P4IPz<ES0P4IPz<E=(g!rʩ2GECT 4P4IPb#qK7SjXhr^K6(*a}& *My,C!2KHLkK?ֱ=ZKV*#(/$B P%ڰ>B$AecW^*5b-@CAj\C!-푱=s! nXh~T.Uk~m yGbv'Q۲^ V6@=뻮nXh+/U{.z]{ڣVjeѯJ8a}IW^z 9Yw#[VXV 7P4IP9XK9p=rZ!r=luYpmXhr~s8uE^+P,Nݰ>B$Ag7btN$ #MTݍ`a}I )G($`=a}I )G($`=a}Ijw,ޯfNMY`bܰ>B$A*ita& *7SK2c~GE^yLJB ;@Цu- #MT6{b$؈R޴\Z_R>ۄ 5U[ & w1P4IPXJTmS^έ ;*k[Q] #MT6䥪# e-`Yuyo:95ʦJDJd9Ѱ>B$AecW^*\|; o_@l7P4IPXKeiq^VnnXhr~퓗eNdyBo9 V\{N|yH~7EiXKؤð>B$A5֫& V$& i~ib1P4IPMx& *X`Xhx & *X`Xhx & Xo 651qXv7qnj$ʰ>B$A>i=Z?إ)QTwfXhr>P^*vgi*;4P4IP9XX AKU[I]WD2 5WwiXh;/x}^rܙJ*Ĵݶg4SE^yz//n*S9ȰG($lK%wB4مa# Av* o0G($lKޯzw]fSero`ĝG($l_jKUؚJqBw,A+;5P4IP9XKL59XH^e8™j-3@r?-:+7d<`]G($ܬCTe#$а>B$Aű mrK`mFQIܙa}Ij~}="xa6pz`ݰ>B$AG($`=a}I )G($`=a}I )G($`})y8VƖ\~a}I*#U̯2]OE祊2]? & *R5ILOK5|eHуE*_V LKEy0etTy|/)mD\֫& *R=TW&WAv~!ۿU^5P4IPX4}e\yL9YʦjI`Xh+/h(R ^o_l3P4IPXKe;TWFY֡0^a}IO^y82͉Bpwzհ>B$Afw^+$1 #MTd}yL_`Xh%;K5xeLkEHYV& *X`Xhx & *X`Xhx & X?#́3.}e;VfL8iXh zoة73H #MTnj)NoOvҴ}I~& *R)6}R]MڣTe|LǫU 8˺BکfE!Ua tsV51UY&ݏװ>B$Aecw^*=ģO**oASFsd9̔'Q!9gΡ֬\`ۋ *Lx#6P4IPX5t{K^ll[xa"M5ъRIHR #MT6䥲dKULV[x2yVzyv?bE^y +l&,wFNܪc gMZXGlXh~퓗mm̡h6xjv Oo#6P4IP9XKUR2mJ'41xulmQi/Ese y8I~& *71)7n_0P4IPz,°>B$Ag~P鹉C>EUwc8kXhx & *X`Xhx & *X`XhGBf53'<}/z8G($^}rnb3£f׏)& *7KmsIf׏)& *RXSU$IKn7.zldn{!SSMT6{!*ݔ[ٰ|fؽJNX?9$AecW^*k"$ %f%d}7~rIzT5_ǻRb& 礪Uw9wSNj($lK%ڝlʬ3Md7=RYYx|ѯGN$Aec'/c_#&/Uʻ\{k%$_j3T)ysʭr~s^/hrok)/U[-Xh][&ѥ܂& *X߹/P4IPz<ES0P4IPz<ES0P4IPz<E-)jQ}cklIpa}I*:ַZ%tf^.VE奒u迵IcK[ #MTַ祲N9\)c&5iGkbF8M<s_cD6!&옒.VE^y\AX9A Jzh_c֤ґ 1?Xg>>xSV Q']­& *RVܝJ cz[|2U9(и.VE^y #MTr #MTv3N}r& Xqt& *X`Xhx & .z ԕCjH.\pM7 ])*ڳ/Z OT'O<}е Sٳgk1Q?ڣSƚcǎet]hе@j5t-&g}6] 4-iC⊋B OHΝHq ,X?=ǎ{熮*5dz>;t-T맢'N<C5:}ɓ'`$Q>cе@.\p3! 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.controller; /** * * Model-View-Controller is a pattern for implementing user interfaces. It divides the application * into three interconnected parts namely the model, the view and the controller. *

* The central component of MVC, the model, captures the behavior of the application in terms of its * problem domain, independent of the user interface. The model directly manages the data, logic and * rules of the application. A view can be any output representation of information, such as a chart * or a diagram The third part, the controller, accepts input and converts it to commands for the * model or view. *

* In this example we have a giant ({@link GiantModel}) with statuses for health, fatigue and * nourishment. {@link GiantView} can display the giant with its current status. * {@link GiantController} receives input affecting the model and delegates redrawing the giant to * the view. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { // create model, view and controller GiantModel giant = new GiantModel(Health.HEALTHY, Fatigue.ALERT, Nourishment.SATURATED); GiantView view = new GiantView(); GiantController controller = new GiantController(giant, view); // initial display controller.updateView(); // controller receives some interactions that affect the giant controller.setHealth(Health.WOUNDED); controller.setNourishment(Nourishment.HUNGRY); controller.setFatigue(Fatigue.TIRED); // redisplay controller.updateView(); } } Fatigue.java000066400000000000000000000026551322244523500355410ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-controller/src/main/java/com/iluwatar/model/view/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.controller; /** * * Fatigue enumeration * */ public enum Fatigue { ALERT("alert"), TIRED("tired"), SLEEPING("sleeping"); private String title; Fatigue(String title) { this.title = title; } @Override public String toString() { return title; } } GiantController.java000066400000000000000000000037601322244523500372610ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-controller/src/main/java/com/iluwatar/model/view/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.controller; /** * * GiantController can update the giant data and redraw it using the view. * */ public class GiantController { private GiantModel giant; private GiantView view; public GiantController(GiantModel giant, GiantView view) { this.giant = giant; this.view = view; } public Health getHealth() { return giant.getHealth(); } public void setHealth(Health health) { this.giant.setHealth(health); } public Fatigue getFatigue() { return giant.getFatigue(); } public void setFatigue(Fatigue fatigue) { this.giant.setFatigue(fatigue); } public Nourishment getNourishment() { return giant.getNourishment(); } public void setNourishment(Nourishment nourishment) { this.giant.setNourishment(nourishment); } public void updateView() { this.view.displayGiant(giant); } } GiantModel.java000066400000000000000000000040501322244523500361670ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-controller/src/main/java/com/iluwatar/model/view/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.controller; /** * * GiantModel contains the giant data * */ public class GiantModel { private Health health; private Fatigue fatigue; private Nourishment nourishment; GiantModel(Health health, Fatigue fatigue, Nourishment nourishment) { this.health = health; this.fatigue = fatigue; this.nourishment = nourishment; } public Health getHealth() { return health; } public void setHealth(Health health) { this.health = health; } public Fatigue getFatigue() { return fatigue; } public void setFatigue(Fatigue fatigue) { this.fatigue = fatigue; } public Nourishment getNourishment() { return nourishment; } public void setNourishment(Nourishment nourishment) { this.nourishment = nourishment; } @Override public String toString() { return String.format("The giant looks %s, %s and %s.", health, fatigue, nourishment); } } GiantView.java000066400000000000000000000027231322244523500360460ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-controller/src/main/java/com/iluwatar/model/view/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.controller; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * GiantView displays the giant * */ public class GiantView { private static final Logger LOGGER = LoggerFactory.getLogger(GiantView.class); public void displayGiant(GiantModel giant) { LOGGER.info(giant.toString()); } } Health.java000066400000000000000000000026521322244523500353570ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-controller/src/main/java/com/iluwatar/model/view/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.controller; /** * * Health enumeration * */ public enum Health { HEALTHY("healthy"), WOUNDED("wounded"), DEAD("dead"); private String title; Health(String title) { this.title = title; } @Override public String toString() { return title; } } Nourishment.java000066400000000000000000000027031322244523500364620ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-controller/src/main/java/com/iluwatar/model/view/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.controller; /** * * Nourishment enumeration * */ public enum Nourishment { SATURATED("saturated"), HUNGRY("hungry"), STARVING("starving"); private String title; Nourishment(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.18.0/model-view-controller/src/test/000077500000000000000000000000001322244523500236305ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-controller/src/test/java/000077500000000000000000000000001322244523500245515ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-controller/src/test/java/com/000077500000000000000000000000001322244523500253275ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-controller/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500271575ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-controller/src/test/java/com/iluwatar/model/000077500000000000000000000000001322244523500302575ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-controller/src/test/java/com/iluwatar/model/view/000077500000000000000000000000001322244523500312315ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-controller/src/test/java/com/iluwatar/model/view/controller/000077500000000000000000000000001322244523500334145ustar00rootroot00000000000000AppTest.java000066400000000000000000000025261322244523500355650ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-controller/src/test/java/com/iluwatar/model/view/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.controller; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } GiantControllerTest.java000066400000000000000000000074571322244523500401630ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-controller/src/test/java/com/iluwatar/model/view/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.controller; import org.junit.jupiter.api.Test; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/20/15 - 2:19 PM * * @author Jeroen Meulemeester */ public class GiantControllerTest { /** * Verify if the controller passes the health level through to the model and vice versa */ @Test public void testSetHealth() { final GiantModel model = mock(GiantModel.class); final GiantView view = mock(GiantView.class); final GiantController controller = new GiantController(model, view); verifyZeroInteractions(model, view); for (final Health health : Health.values()) { controller.setHealth(health); verify(model).setHealth(health); verifyZeroInteractions(view); } controller.getHealth(); verify(model).getHealth(); verifyNoMoreInteractions(model, view); } /** * Verify if the controller passes the fatigue level through to the model and vice versa */ @Test public void testSetFatigue() { final GiantModel model = mock(GiantModel.class); final GiantView view = mock(GiantView.class); final GiantController controller = new GiantController(model, view); verifyZeroInteractions(model, view); for (final Fatigue fatigue : Fatigue.values()) { controller.setFatigue(fatigue); verify(model).setFatigue(fatigue); verifyZeroInteractions(view); } controller.getFatigue(); verify(model).getFatigue(); verifyNoMoreInteractions(model, view); } /** * Verify if the controller passes the nourishment level through to the model and vice versa */ @Test public void testSetNourishment() { final GiantModel model = mock(GiantModel.class); final GiantView view = mock(GiantView.class); final GiantController controller = new GiantController(model, view); verifyZeroInteractions(model, view); for (final Nourishment nourishment : Nourishment.values()) { controller.setNourishment(nourishment); verify(model).setNourishment(nourishment); verifyZeroInteractions(view); } controller.getNourishment(); verify(model).getNourishment(); verifyNoMoreInteractions(model, view); } @Test public void testUpdateView() { final GiantModel model = mock(GiantModel.class); final GiantView view = mock(GiantView.class); final GiantController controller = new GiantController(model, view); verifyZeroInteractions(model, view); controller.updateView(); verify(view).displayGiant(model); verifyNoMoreInteractions(model, view); } }GiantModelTest.java000066400000000000000000000057551322244523500370770ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-controller/src/test/java/com/iluwatar/model/view/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.controller; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Date: 12/20/15 - 2:10 PM * * @author Jeroen Meulemeester */ public class GiantModelTest { /** * Verify if the health value is set properly though the constructor and setter */ @Test public void testSetHealth() { final GiantModel model = new GiantModel(Health.HEALTHY, Fatigue.ALERT, Nourishment.SATURATED); assertEquals(Health.HEALTHY, model.getHealth()); for (final Health health : Health.values()) { model.setHealth(health); assertEquals(health, model.getHealth()); assertEquals("The giant looks " + health.toString() + ", alert and saturated.", model.toString()); } } /** * Verify if the fatigue level is set properly though the constructor and setter */ @Test public void testSetFatigue() { final GiantModel model = new GiantModel(Health.HEALTHY, Fatigue.ALERT, Nourishment.SATURATED); assertEquals(Fatigue.ALERT, model.getFatigue()); for (final Fatigue fatigue : Fatigue.values()) { model.setFatigue(fatigue); assertEquals(fatigue, model.getFatigue()); assertEquals("The giant looks healthy, " + fatigue.toString() + " and saturated.", model.toString()); } } /** * Verify if the nourishment level is set properly though the constructor and setter */ @Test public void testSetNourishment() { final GiantModel model = new GiantModel(Health.HEALTHY, Fatigue.ALERT, Nourishment.SATURATED); assertEquals(Nourishment.SATURATED, model.getNourishment()); for (final Nourishment nourishment : Nourishment.values()) { model.setNourishment(nourishment); assertEquals(nourishment, model.getNourishment()); assertEquals("The giant looks healthy, alert and " + nourishment.toString() + ".", model.toString()); } } } GiantViewTest.java000066400000000000000000000056021322244523500367400ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-controller/src/test/java/com/iluwatar/model/view/controller/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.controller; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.mockito.Mockito.mock; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import java.util.LinkedList; import java.util.List; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.slf4j.LoggerFactory; /** * Date: 12/20/15 - 2:04 PM * * @author Jeroen Meulemeester */ public class GiantViewTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(GiantView.class); } @AfterEach public void tearDown() { appender.stop(); } /** * Verify if the {@link GiantView} does what it has to do: Print the {@link GiantModel} to the * standard out stream, nothing more, nothing less. */ @Test public void testDisplayGiant() { final GiantView view = new GiantView(); final GiantModel model = mock(GiantModel.class); view.displayGiant(model); assertEquals(model.toString(), appender.getLastMessage()); assertEquals(1, appender.getLogSize()); } /** * Logging Appender Implementation */ public class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender(Class clazz) { ((Logger) LoggerFactory.getLogger(clazz)).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public String getLastMessage() { return log.get(log.size() - 1).getMessage(); } public int getLogSize() { return log.size(); } } } java-design-patterns-1.18.0/model-view-presenter/000077500000000000000000000000001322244523500217065ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-presenter/README.md000066400000000000000000000012701322244523500231650ustar00rootroot00000000000000--- layout: pattern title: Model-View-Presenter folder: model-view-presenter permalink: /patterns/model-view-presenter/ categories: Presentation Tier tags: - Java - Difficulty-Intermediate --- ## Intent Apply a "Separation of Concerns" principle in a way that allows developers to build and test user interfaces. ![alt text](./etc/model-view-presenter_1.png "Model-View-Presenter") ## Applicability Use the Model-View-Presenter in any of the following situations * when you want to improve the "Separation of Concerns" principle in presentation logic * when a user interface development and testing is necessary. ## Real world examples * [MVP4J](https://github.com/amineoualialami/mvp4j) java-design-patterns-1.18.0/model-view-presenter/etc/000077500000000000000000000000001322244523500224615ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-presenter/etc/data/000077500000000000000000000000001322244523500233725ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-presenter/etc/data/test.txt000066400000000000000000000022361322244523500251150ustar00rootroot00000000000000==== The MIT License Copyright (c) 2014-2016 Ilkka Seppälä Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.presenter; /** * * The Model-View-Presenter(MVP) architectural pattern, helps us achieve what is called * "The separation of concerns" principle. This is accomplished by separating the application's * logic (Model), GUIs (View), and finally the way that the user's actions update the application's * logic (Presenter). *

* In the following example, The {@link FileLoader} class represents the app's logic, the * {@link FileSelectorJFrame} is the GUI and the {@link FileSelectorPresenter} is responsible to * respond to users' actions. *

* Finally, please notice the wiring between the Presenter and the View and between the Presenter * and the Model. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { FileLoader loader = new FileLoader(); FileSelectorJFrame jFrame = new FileSelectorJFrame(); FileSelectorPresenter presenter = new FileSelectorPresenter(jFrame); presenter.setLoader(loader); presenter.start(); } } FileLoader.java000066400000000000000000000061461322244523500356320ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-presenter/src/main/java/com/iluwatar/model/view/presenter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.presenter; import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.io.Serializable; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Every instance of this class represents the Model component in the Model-View-Presenter * architectural pattern. *

* It is responsible for reading and loading the contents of a given file. */ public class FileLoader implements Serializable { /** * Generated serial version UID */ private static final long serialVersionUID = -4745803872902019069L; private static final Logger LOGGER = LoggerFactory.getLogger(FileLoader.class); /** * Indicates if the file is loaded or not. */ private boolean loaded; /** * The name of the file that we want to load. */ private String fileName; /** * Loads the data of the file specified. */ public String loadData() { String dataFileName = this.fileName; try (BufferedReader br = new BufferedReader(new FileReader(new File(dataFileName)))) { StringBuilder sb = new StringBuilder(); String line; while ((line = br.readLine()) != null) { sb.append(line).append('\n'); } this.loaded = true; return sb.toString(); } catch (Exception e) { LOGGER.error("File {} does not exist", dataFileName); } return null; } /** * Sets the path of the file to be loaded, to the given value. * * @param fileName The path of the file to be loaded. */ public void setFileName(String fileName) { this.fileName = fileName; } /** * @return fileName The path of the file to be loaded. */ public String getFileName() { return this.fileName; } /** * @return True, if the file given exists, false otherwise. */ public boolean fileExists() { return new File(this.fileName).exists(); } /** * @return True, if the file is loaded, false otherwise. */ public boolean isLoaded() { return this.loaded; } } FileSelectorJFrame.java000066400000000000000000000124151322244523500372650ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-presenter/src/main/java/com/iluwatar/model/view/presenter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.presenter; import java.awt.Color; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTextArea; import javax.swing.JTextField; /** * This class is the GUI implementation of the View component in the Model-View-Presenter pattern. */ public class FileSelectorJFrame extends JFrame implements FileSelectorView, ActionListener { /** * Default serial version ID. */ private static final long serialVersionUID = 1L; /** * The "OK" button for loading the file. */ private JButton ok; /** * The cancel button. */ private JButton cancel; /** * The information label. */ private JLabel info; /** * The contents label. */ private JLabel contents; /** * The text field for giving the name of the file that we want to open. */ private JTextField input; /** * A text area that will keep the contents of the file opened. */ private JTextArea area; /** * The panel that will hold our widgets. */ private JPanel panel; /** * The Presenter component that the frame will interact with */ private FileSelectorPresenter presenter; /** * The name of the file that we want to read it's contents. */ private String fileName; /** * Constructor. */ public FileSelectorJFrame() { super("File Loader"); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setLayout(null); this.setBounds(100, 100, 500, 200); /* * Add the panel. */ this.panel = new JPanel(); panel.setLayout(null); this.add(panel); panel.setBounds(0, 0, 500, 200); panel.setBackground(Color.LIGHT_GRAY); /* * Add the info label. */ this.info = new JLabel("File Name :"); this.panel.add(info); info.setBounds(30, 10, 100, 30); /* * Add the contents label. */ this.contents = new JLabel("File contents :"); this.panel.add(contents); this.contents.setBounds(30, 100, 120, 30); /* * Add the text field. */ this.input = new JTextField(100); this.panel.add(input); this.input.setBounds(150, 15, 200, 20); /* * Add the text area. */ this.area = new JTextArea(100, 100); JScrollPane pane = new JScrollPane(area); pane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED); pane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED); this.panel.add(pane); this.area.setEditable(false); pane.setBounds(150, 100, 250, 80); /* * Add the OK button. */ this.ok = new JButton("OK"); this.panel.add(ok); this.ok.setBounds(250, 50, 100, 25); this.ok.addActionListener(this); /* * Add the cancel button. */ this.cancel = new JButton("Cancel"); this.panel.add(this.cancel); this.cancel.setBounds(380, 50, 100, 25); this.cancel.addActionListener(this); this.presenter = null; this.fileName = null; } @Override public void actionPerformed(ActionEvent e) { if (this.ok.equals(e.getSource())) { this.fileName = this.input.getText(); presenter.fileNameChanged(); presenter.confirmed(); } else if (this.cancel.equals(e.getSource())) { presenter.cancelled(); } } @Override public void open() { this.setVisible(true); } @Override public void close() { this.dispose(); } @Override public boolean isOpened() { return this.isVisible(); } @Override public void setPresenter(FileSelectorPresenter presenter) { this.presenter = presenter; } @Override public FileSelectorPresenter getPresenter() { return this.presenter; } @Override public void setFileName(String name) { this.fileName = name; } @Override public String getFileName() { return this.fileName; } @Override public void showMessage(String message) { JOptionPane.showMessageDialog(null, message); } @Override public void displayData(String data) { this.area.setText(data); } } FileSelectorPresenter.java000066400000000000000000000057661322244523500401030ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-presenter/src/main/java/com/iluwatar/model/view/presenter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.presenter; import java.io.Serializable; /** * Every instance of this class represents the Presenter component in the Model-View-Presenter * architectural pattern. *

* It is responsible for reacting to the user's actions and update the View component. */ public class FileSelectorPresenter implements Serializable { /** * Generated serial version UID */ private static final long serialVersionUID = 1210314339075855074L; /** * The View component that the presenter interacts with. */ private FileSelectorView view; /** * The Model component that the presenter interacts with. */ private FileLoader loader; /** * Constructor * * @param view The view component that the presenter will interact with. */ public FileSelectorPresenter(FileSelectorView view) { this.view = view; } /** * Sets the {@link FileLoader} object, to the value given as parameter. * * @param loader The new {@link FileLoader} object(the Model component). */ public void setLoader(FileLoader loader) { this.loader = loader; } /** * Starts the presenter. */ public void start() { view.setPresenter(this); view.open(); } /** * An "event" that fires when the name of the file to be loaded changes. */ public void fileNameChanged() { loader.setFileName(view.getFileName()); } /** * Ok button handler */ public void confirmed() { if (loader.getFileName() == null || loader.getFileName().equals("")) { view.showMessage("Please give the name of the file first!"); return; } if (loader.fileExists()) { String data = loader.loadData(); view.displayData(data); } else { view.showMessage("The file specified does not exist."); } } /** * Cancels the file loading process. */ public void cancelled() { view.close(); } } FileSelectorStub.java000066400000000000000000000064531322244523500370430ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-presenter/src/main/java/com/iluwatar/model/view/presenter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.presenter; /** * Every instance of this class represents the Stub component in the Model-View-Presenter * architectural pattern. *

* The stub implements the View interface and it is useful when we want the test the reaction to * user events, such as mouse clicks. *

* Since we can not test the GUI directly, the MVP pattern provides this functionality through the * View's dummy implementation, the Stub. */ public class FileSelectorStub implements FileSelectorView { /** * Indicates whether or not the view is opened. */ private boolean opened; /** * The presenter Component. */ private FileSelectorPresenter presenter; /** * The current name of the file. */ private String name; /** * Indicates the number of messages that were "displayed" to the user. */ private int numOfMessageSent; /** * Indicates if the data of the file where displayed or not. */ private boolean dataDisplayed; /** * Constructor */ public FileSelectorStub() { this.opened = false; this.presenter = null; this.name = ""; this.numOfMessageSent = 0; this.dataDisplayed = false; } @Override public void open() { this.opened = true; } @Override public void setPresenter(FileSelectorPresenter presenter) { this.presenter = presenter; } @Override public boolean isOpened() { return this.opened; } @Override public FileSelectorPresenter getPresenter() { return this.presenter; } @Override public String getFileName() { return this.name; } @Override public void setFileName(String name) { this.name = name; } @Override public void showMessage(String message) { this.numOfMessageSent++; } @Override public void close() { this.opened = false; } @Override public void displayData(String data) { this.dataDisplayed = true; } /** * Returns the number of messages that were displayed to the user. */ public int getMessagesSent() { return this.numOfMessageSent; } /** * @return True if the data where displayed, false otherwise. */ public boolean dataDisplayed() { return this.dataDisplayed; } } FileSelectorView.java000066400000000000000000000045571322244523500370430ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-presenter/src/main/java/com/iluwatar/model/view/presenter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.presenter; import java.io.Serializable; /** * This interface represents the View component in the Model-View-Presenter pattern. It can be * implemented by either the GUI components, or by the Stub. */ public interface FileSelectorView extends Serializable { /** * Opens the view. */ void open(); /** * Closes the view. */ void close(); /** * @return True, if the view is opened, false otherwise. */ boolean isOpened(); /** * Sets the presenter component, to the one given as parameter. * * @param presenter The new presenter component. */ void setPresenter(FileSelectorPresenter presenter); /** * @return The presenter Component. */ FileSelectorPresenter getPresenter(); /** * Sets the file's name, to the value given as parameter. * * @param name The new name of the file. */ void setFileName(String name); /** * @return The name of the file. */ String getFileName(); /** * Displays a message to the users. * * @param message The message to be displayed. */ void showMessage(String message); /** * Displays the data to the view. * * @param data The data to be written. */ void displayData(String data); } java-design-patterns-1.18.0/model-view-presenter/src/test/000077500000000000000000000000001322244523500234545ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-presenter/src/test/java/000077500000000000000000000000001322244523500243755ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-presenter/src/test/java/com/000077500000000000000000000000001322244523500251535ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-presenter/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500270035ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-presenter/src/test/java/com/iluwatar/model/000077500000000000000000000000001322244523500301035ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-presenter/src/test/java/com/iluwatar/model/view/000077500000000000000000000000001322244523500310555ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-presenter/src/test/java/com/iluwatar/model/view/presenter/000077500000000000000000000000001322244523500330645ustar00rootroot00000000000000AppTest.java000066400000000000000000000025261322244523500352350ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-presenter/src/test/java/com/iluwatar/model/view/presenter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.presenter; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } FileLoaderTest.java000066400000000000000000000030651322244523500365220ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-presenter/src/test/java/com/iluwatar/model/view/presenter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.presenter; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertNull; /** * Date: 12/21/15 - 12:12 PM * * @author Jeroen Meulemeester */ public class FileLoaderTest { @Test public void testLoadData() throws Exception { final FileLoader fileLoader = new FileLoader(); fileLoader.setFileName("non-existing-file"); assertNull(fileLoader.loadData()); } }FileSelectorPresenterTest.java000066400000000000000000000076651322244523500407760ustar00rootroot00000000000000java-design-patterns-1.18.0/model-view-presenter/src/test/java/com/iluwatar/model/view/presenter/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.model.view.presenter; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertTrue; /** * This test case is responsible for testing our application by taking advantage of the * Model-View-Controller architectural pattern. */ public class FileSelectorPresenterTest { /** * The Presenter component. */ private FileSelectorPresenter presenter; /** * The View component, implemented this time as a Stub!!! */ private FileSelectorStub stub; /** * The Model component. */ private FileLoader loader; /** * Initializes the components of the test case. */ @BeforeEach public void setUp() { this.stub = new FileSelectorStub(); this.loader = new FileLoader(); presenter = new FileSelectorPresenter(this.stub); presenter.setLoader(loader); } /** * Tests if the Presenter was successfully connected with the View. */ @Test public void wiring() { presenter.start(); assertNotNull(stub.getPresenter()); assertTrue(stub.isOpened()); } /** * Tests if the name of the file changes. */ @Test public void updateFileNameToLoader() { String expectedFile = "Stamatis"; stub.setFileName(expectedFile); presenter.start(); presenter.fileNameChanged(); assertEquals(expectedFile, loader.getFileName()); } /** * Tests if we receive a confirmation when we attempt to open a file that it's name is null or an * empty string. */ @Test public void fileConfirmationWhenNameIsNull() { stub.setFileName(null); presenter.start(); presenter.fileNameChanged(); presenter.confirmed(); assertFalse(loader.isLoaded()); assertEquals(1, stub.getMessagesSent()); } /** * Tests if we receive a confirmation when we attempt to open a file that it doesn't exist. */ @Test public void fileConfirmationWhenFileDoesNotExist() { stub.setFileName("RandomName.txt"); presenter.start(); presenter.fileNameChanged(); presenter.confirmed(); assertFalse(loader.isLoaded()); assertEquals(1, stub.getMessagesSent()); } /** * Tests if we can open the file, when it exists. */ @Test public void fileConfirmationWhenFileExists() { stub.setFileName("etc/data/test.txt"); presenter.start(); presenter.fileNameChanged(); presenter.confirmed(); assertTrue(loader.isLoaded()); assertTrue(stub.dataDisplayed()); } /** * Tests if the view closes after cancellation. */ @Test public void cancellation() { presenter.start(); presenter.cancelled(); assertFalse(stub.isOpened()); } } java-design-patterns-1.18.0/module/000077500000000000000000000000001322244523500171165ustar00rootroot00000000000000java-design-patterns-1.18.0/module/README.md000066400000000000000000000015701322244523500204000ustar00rootroot00000000000000--- layout: pattern title: Module folder: module permalink: /patterns/module/ categories: Creational Pattern tags: - Java - Difficulty-Beginner --- ## Intent Module pattern is used to implement the concept of software modules, defined by modular programming, in a programming language with incomplete direct support for the concept. ![alt text](./etc/module.png "Module") ## Applicability The Module pattern can be considered a creational pattern and a structural pattern. It manages the creation and organization of other elements, and groups them as the structural pattern does. An object that applies this pattern can provide the equivalent of a namespace, providing the initialization and finalization process of a static class or a class with static members with cleaner, more concise syntax and semantics. ## Credits * [Module](https://en.wikipedia.org/wiki/Module_pattern) java-design-patterns-1.18.0/module/error.txt000066400000000000000000000022021322244523500210040ustar00rootroot00000000000000==== The MIT License Copyright (c) 2014 Ilkka Seppälä Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ==== java-design-patterns-1.18.0/module/etc/000077500000000000000000000000001322244523500176715ustar00rootroot00000000000000java-design-patterns-1.18.0/module/etc/module.png000066400000000000000000000431531322244523500216720ustar00rootroot00000000000000PNG  IHDR 52F2IDATxoWyWU_^}&)vienK +EpC )$MHJ) lqH\o K*FH̜9syf?}̝skk`-P1=*0 PHb-!Q3a-0+X *a-P?D9TR %kw8~š?R{F`?oo5Fk(9]0"ՠJtd-^쉭e? p5 Q1،ߛ)";[ZrP8>"gjNGZ7o5HD7=ֲ3ܛ@Sk!HF33]< C0w6G;=(ֶnz-,Dϔ~OGmj[i߾Z?nz X˃OJ9Ͽ3GB<7Dyo`-ȟD7Eu}_Fo>~ڻeb&7› 7V ܝ1J<:ei'{ ւItӫZ{[W>tl:G%8D%~f8Zk.X 'MVkyg7n=?~=?wte3Q{ƒwZ?tE֢ A?wcjL  ;5VdwnzrJtӫZn?2e=Oݥ'nWDŽXKˇh;3u3a~PffBk1^ 5rK+MVkQaχo u{XQZG-<K2GEoOB44qwQ[N3Ǿ~s>ĝUbs-F%;D˃O ,\Kr)CUxm5& sV+= [PIvzo^ϵc?'ޯhz`o?uae/~zcov=я=5,l9nz-Scx F2w[K߽Nk7<]lFuXbDǷoZjP%ZT/ɮ8o:`uuQh<ۋH:O]FjG~LjYǷojY̺%ZG-[t-GQ~?ÓdFE󱛽 QKGchDǷoZjjY$Zs-YK09nNu毒%zAzJ$Rӟbr8[Ŝz1U(jDǷoZjhYd1[%Mւ$Q,0nzX *VC?T"Q,0nzX *VCSD7=Ht|VItZPDǷoh5ȟD7WV^ȡm9=ySB#AFoj?nzX * 覇oj?nzkRIm$/c/H&2iN(S _6|<k5U&MZ"4kiJt|kA$-4!̆5@^%:} lc [Bc9D̵L`- JOZ~'_jC?}sq+x฻kF{ֆýc{ `Fm<#2ȟD7=Z{PzuݏzU7aړ?&^E 8ksV7d(?nz3XK|d蝾V̞1j[[S^Wܥ JỌˏwi%:}C ?nzլ!Hc{f`l$:>u#}C ?nz-O5gts#2|!'MϳD嬓D~5]㨅 %CoߔZ J4D7=Ht| %O^5ֲz]CNQ$Ƿozd(7nzZPDǷo2(GIT"!2J$:} 2J$:}Dv$7=LoZ BItӫD#goLߛ3Q'`卣#sQp#ҳ7LىSʜ`o`-ȟD7jLܛ8Y "pChwg<;1;Rj1Wq̞e:Zn uɚɿwݯ Q4iDǷoO^%U& S;zF-bL|%:d&ͼTFTWIY<ĄX03.痹NLDǷo|[17&yF턮IGTD7*Ld'ƹen-{Y%:}co5̟@Im˟)f,'\VmEұnzT,JkA23B%}ZITr2&:(;{昒0KzH-TRa%&aeXR_AcJV-ʤckd7X 'M*Y넘Bb$kkA$URe:j v:TΐWbdF7:ǙWaIMɶIt[e26O,khmm|YDKZVK{Y|J5%JtӫdY?>2tKN.Uj-Z|jf23nO^dW%UX^=̕YVB5Vw|p%s1d7VTe2WQT܊z-WkTnz,OORJf$:}ci5U&fS3A|e4TԔlT$k1(+_7VSZe>e.lKP5%'ZP#߾*Ty7MyjJEւJ$:}`ɥ o/̥KsX 5%&M*~XVK_Ȑ7nzZPDǷoh5ȟD7=Ht|VItZPDǷoh5ȟD7=Ht|VItZPDǷoh5ȟD7eS-k߾Z?nzֲ3j9U]kʋ=ܲ0AEW>?N2Aǭ=Ы}w?U]bi5-(MZpM-Ds J.Ūw{Z?nzNRkneMĝom;8/Vu%ւIts5\s{ɨ%ªwKZƯ޺鷏;gYQ%鹦]pVf^ɄXՕnֲշrGO*83Sl9_v0meVk_\^LvDǷoOւJ$:}X4^U]hJG~r9岚\q], *BihZ5xuV.[Kp1=gozkJA ˙/&MkA%߾o؟sgk3Pd'〢2Bj{ֆ{3\N\}yqkT"SԥhQdٲߝN&?k<=3\FFg[K%9#T"_{ov@|/{JNTԺQ㻒#!Ko,zxeљc&{tH*'~7kA߾s{np_UWm= Sn=6Ns}mX<L%1l'b-kA%߾Yg=ty}Jj1񋦶2Ɛ cNY{Byo?s+~„XZPDǷolW\u=ℼ!MG3su2; R=#qhaw7<@mI vCւJ$:}ckΨ|BȜ"jZ2_)YDǷojU~,e]B{CW_jJ6 nZ jD7L2n&W)Bo`-ȟD7LZJn?V|_G~BMI=`-ȟD7jLb鞚w#`-ȟD7jL:=?U]j- >᥉K߾ɵϟ~+FpH;6+K$U]eTHay-f-Ԕ\MZ/EKTn,M*2Gd %:}c%ZKtks-qo1!̆5gE覇o%:!˷?n*HYtZPDǷoJs-v썯}lX |ÿsqVnf,a-D7yk' 'Ԇ߿w~a0&Ă7%+3K7sl̙+OrzQLV#ƕK?SuS;S7sѺ]jzX *MQ~xGS?ƈ[sXo|9}[\nfւJ$:}Sj^-w|a_;Տj~r[;^;cnB%bEnzɥCFrzr癏w>ckXם\W;SPL=PݲlB즵5߾{g}< ctWӋ3-̙ c+4Y}S73fjzX *ռ|6d=s:nfJւJ$:}PW%VuT7S7_uow>? 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轃^o:P]vHq珟a0Eo09گ4ٌzF?ItӳEX D*Rd-'n9 ODz\vǨ7ʕCL`YGֹW'a<> Ԙ&؍ڏC+E+?TՏjgZ1Dw#IC JN; v|X @)D*Rd-/y;/G3c- E*:>vPn-=ٰ`-A+Er癏w>c85I<#{@+ o>VWS^vzI^n>nVX HHWY kI.&HXBTpER Rqa- "\YZVWuoZJQKZ@ D*2>K d--XZ@ D*2D4/w@X HHWk\X HHWfODTpn-2"a( X0^`8Z~֦{D@g R"kq2ehTZ3J8T4[K:ɲ=m  ج.'sL4kE'{kyU4a- "\Y*;Xצ1T?N/V/޳-/ϵ4Z@ D*bs{np_UWm=Q]٭Z{A+6ky졇._^]Im{$X\rx̄HWlW\u=i{pL^2*X @"\Yo^^.}eu >X HHW||f-e,X HWXTqa- "\ZR Rqa- "\ZR Rqa- "\YYyqE '*keROIENDB`java-design-patterns-1.18.0/module/etc/module.ucls000066400000000000000000000077411322244523500220570ustar00rootroot00000000000000 java-design-patterns-1.18.0/module/output.txt000066400000000000000000000022021322244523500212130ustar00rootroot00000000000000==== The MIT License Copyright (c) 2014 Ilkka Seppälä Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ==== java-design-patterns-1.18.0/module/pom.xml000066400000000000000000000037141322244523500204400ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 module org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test log4j log4j java-design-patterns-1.18.0/module/src/000077500000000000000000000000001322244523500177055ustar00rootroot00000000000000java-design-patterns-1.18.0/module/src/main/000077500000000000000000000000001322244523500206315ustar00rootroot00000000000000java-design-patterns-1.18.0/module/src/main/java/000077500000000000000000000000001322244523500215525ustar00rootroot00000000000000java-design-patterns-1.18.0/module/src/main/java/com/000077500000000000000000000000001322244523500223305ustar00rootroot00000000000000java-design-patterns-1.18.0/module/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500241605ustar00rootroot00000000000000java-design-patterns-1.18.0/module/src/main/java/com/iluwatar/module/000077500000000000000000000000001322244523500254455ustar00rootroot00000000000000java-design-patterns-1.18.0/module/src/main/java/com/iluwatar/module/App.java000066400000000000000000000065541322244523500270420ustar00rootroot00000000000000/** * The MIT License Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and * associated documentation files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, publish, distribute, * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.module; import java.io.FileNotFoundException; /** * The Module pattern can be considered a Creational pattern and a Structural pattern. It manages * the creation and organization of other elements, and groups them as the structural pattern does. * An object that applies this pattern can provide the equivalent of a namespace, providing the * initialization and finalization process of a static class or a class with static members with * cleaner, more concise syntax and semantics. *

* The below example demonstrates a use case for testing two different modules: File Logger and * Console Logger * */ public final class App { public static FileLoggerModule fileLoggerModule; public static ConsoleLoggerModule consoleLoggerModule; /** * Following method performs the initialization * * @throws FileNotFoundException if program is not able to find log files (output.txt and * error.txt) */ public static void prepare() throws FileNotFoundException { /* Create new singleton objects and prepare their modules */ fileLoggerModule = FileLoggerModule.getSingleton().prepare(); consoleLoggerModule = ConsoleLoggerModule.getSingleton().prepare(); } /** * Following method performs the finalization */ public static void unprepare() { /* Close all resources */ fileLoggerModule.unprepare(); consoleLoggerModule.unprepare(); } /** * Following method is main executor * * @param args for providing default program arguments */ public static void execute(final String... args) { /* Send logs on file system */ fileLoggerModule.printString("Message"); fileLoggerModule.printErrorString("Error"); /* Send logs on console */ consoleLoggerModule.printString("Message"); consoleLoggerModule.printErrorString("Error"); } /** * Program entry point. * * @param args command line args. * @throws FileNotFoundException if program is not able to find log files (output.txt and * error.txt) */ public static void main(final String... args) throws FileNotFoundException { prepare(); execute(args); unprepare(); } private App() {} } java-design-patterns-1.18.0/module/src/main/java/com/iluwatar/module/ConsoleLoggerModule.java000066400000000000000000000061321322244523500322220ustar00rootroot00000000000000/** * The MIT License Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and * associated documentation files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, publish, distribute, * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.module; import java.io.PrintStream; import org.apache.log4j.Logger; /** * The ConsoleLoggerModule is responsible for showing logs on System Console *

* The below example demonstrates a Console logger module, which can print simple and error messages * in two designated formats */ public final class ConsoleLoggerModule { private static final Logger LOGGER = Logger.getLogger(ConsoleLoggerModule.class); private static ConsoleLoggerModule singleton = null; public PrintStream output = null; public PrintStream error = null; private ConsoleLoggerModule() {} /** * Static method to get single instance of class * * @return singleton instance of ConsoleLoggerModule */ public static ConsoleLoggerModule getSingleton() { if (ConsoleLoggerModule.singleton == null) { ConsoleLoggerModule.singleton = new ConsoleLoggerModule(); } return ConsoleLoggerModule.singleton; } /** * Following method performs the initialization */ public ConsoleLoggerModule prepare() { LOGGER.debug("ConsoleLoggerModule::prepare();"); this.output = new PrintStream(System.out); this.error = new PrintStream(System.err); return this; } /** * Following method performs the finalization */ public void unprepare() { if (this.output != null) { this.output.flush(); this.output.close(); } if (this.error != null) { this.error.flush(); this.error.close(); } LOGGER.debug("ConsoleLoggerModule::unprepare();"); } /** * Used to print a message * * @param value will be printed on console */ public void printString(final String value) { this.output.println(value); } /** * Used to print a error message * * @param value will be printed on error console */ public void printErrorString(final String value) { this.error.println(value); } } java-design-patterns-1.18.0/module/src/main/java/com/iluwatar/module/FileLoggerModule.java000066400000000000000000000066501322244523500315040ustar00rootroot00000000000000/** * The MIT License Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and * associated documentation files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, publish, distribute, * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.module; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.PrintStream; import org.apache.log4j.Logger; /** * The FileLoggerModule is responsible for showing logs on File System *

* The below example demonstrates a File logger module, which can print simple and error messages in * two designated files */ public final class FileLoggerModule { private static final Logger LOGGER = Logger.getLogger(FileLoggerModule.class); private static FileLoggerModule singleton = null; private static final String OUTPUT_FILE = "output.txt"; private static final String ERROR_FILE = "error.txt"; public PrintStream output = null; public PrintStream error = null; private FileLoggerModule() {} /** * Static method to get single instance of class * * @return singleton instance of FileLoggerModule */ public static FileLoggerModule getSingleton() { if (FileLoggerModule.singleton == null) { FileLoggerModule.singleton = new FileLoggerModule(); } return FileLoggerModule.singleton; } /** * Following method performs the initialization * * @throws FileNotFoundException if program is not able to find log files (output.txt and * error.txt) */ public FileLoggerModule prepare() throws FileNotFoundException { LOGGER.debug("FileLoggerModule::prepare();"); this.output = new PrintStream(new FileOutputStream(OUTPUT_FILE)); this.error = new PrintStream(new FileOutputStream(ERROR_FILE)); return this; } /** * Following method performs the finalization */ public void unprepare() { if (this.output != null) { this.output.flush(); this.output.close(); } if (this.error != null) { this.error.flush(); this.error.close(); } LOGGER.debug("FileLoggerModule::unprepare();"); } /** * Used to print a message * * @param value will be printed in file */ public void printString(final String value) { this.output.println(value); } /** * Used to print a error message * * @param value will be printed on error file */ public void printErrorString(final String value) { this.error.println(value); } } java-design-patterns-1.18.0/module/src/main/resources/000077500000000000000000000000001322244523500226435ustar00rootroot00000000000000java-design-patterns-1.18.0/module/src/main/resources/log4j.xml000066400000000000000000000032151322244523500244050ustar00rootroot00000000000000 java-design-patterns-1.18.0/module/src/test/000077500000000000000000000000001322244523500206645ustar00rootroot00000000000000java-design-patterns-1.18.0/module/src/test/java/000077500000000000000000000000001322244523500216055ustar00rootroot00000000000000java-design-patterns-1.18.0/module/src/test/java/com/000077500000000000000000000000001322244523500223635ustar00rootroot00000000000000java-design-patterns-1.18.0/module/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500242135ustar00rootroot00000000000000java-design-patterns-1.18.0/module/src/test/java/com/iluwatar/module/000077500000000000000000000000001322244523500255005ustar00rootroot00000000000000java-design-patterns-1.18.0/module/src/test/java/com/iluwatar/module/AppTest.java000066400000000000000000000026351322244523500277310ustar00rootroot00000000000000/** * The MIT License Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and * associated documentation files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, publish, distribute, * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.module; import org.junit.jupiter.api.Test; import java.io.FileNotFoundException; /** * Tests that Module example runs without errors. */ public final class AppTest { @Test public void test() throws FileNotFoundException { final String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/module/src/test/java/com/iluwatar/module/FileLoggerModuleTest.java000066400000000000000000000143341322244523500323750ustar00rootroot00000000000000/** * The MIT License Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and * associated documentation files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, publish, distribute, * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.iluwatar.module; import org.apache.log4j.Logger; import org.junit.jupiter.api.Test; import java.io.BufferedReader; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.IOException; import static org.junit.jupiter.api.Assertions.assertEquals; /** * The Module pattern can be considered a Creational pattern and a Structural pattern. It manages * the creation and organization of other elements, and groups them as the structural pattern does. * An object that applies this pattern can provide the equivalent of a namespace, providing the * initialization and finalization process of a static class or a class with static members with * cleaner, more concise syntax and semantics. *

* The below example demonstrates a JUnit test for testing two different modules: File Logger and * Console Logger */ public final class FileLoggerModuleTest { private static final Logger LOGGER = Logger.getLogger(FileLoggerModuleTest.class); private static final String OUTPUT_FILE = "output.txt"; private static final String ERROR_FILE = "error.txt"; private static final String MESSAGE = "MESSAGE"; private static final String ERROR = "ERROR"; /** * This test verify that 'MESSAGE' is perfectly printed in output file * * @throws IOException if program is not able to find log files (output.txt and error.txt) */ @Test public void testFileMessage() throws IOException { /* Get singletong instance of File Logger Module */ final FileLoggerModule fileLoggerModule = FileLoggerModule.getSingleton(); /* Prepare the essential sub modules, to perform the sequence of jobs */ fileLoggerModule.prepare(); /* Print 'Message' in file */ fileLoggerModule.printString(MESSAGE); /* Test if 'Message' is printed in file */ assertEquals(readFirstLine(OUTPUT_FILE), MESSAGE); /* Unprepare to cleanup the modules */ fileLoggerModule.unprepare(); } /** * This test verify that nothing is printed in output file * * @throws IOException if program is not able to find log files (output.txt and error.txt) */ @Test public void testNoFileMessage() throws IOException { /* Get singletong instance of File Logger Module */ final FileLoggerModule fileLoggerModule = FileLoggerModule.getSingleton(); /* Prepare the essential sub modules, to perform the sequence of jobs */ fileLoggerModule.prepare(); /* Test if nothing is printed in file */ assertEquals(readFirstLine(OUTPUT_FILE), null); /* Unprepare to cleanup the modules */ fileLoggerModule.unprepare(); } /** * This test verify that 'ERROR' is perfectly printed in error file * * @throws FileNotFoundException if program is not able to find log files (output.txt and * error.txt) */ @Test public void testFileErrorMessage() throws FileNotFoundException { /* Get singletong instance of File Logger Module */ final FileLoggerModule fileLoggerModule = FileLoggerModule.getSingleton(); /* Prepare the essential sub modules, to perform the sequence of jobs */ fileLoggerModule.prepare(); /* Print 'Error' in file */ fileLoggerModule.printErrorString(ERROR); /* Test if 'Message' is printed in file */ assertEquals(readFirstLine(ERROR_FILE), ERROR); /* Unprepare to cleanup the modules */ fileLoggerModule.unprepare(); } /** * This test verify that nothing is printed in error file * * @throws FileNotFoundException if program is not able to find log files (output.txt and * error.txt) */ @Test public void testNoFileErrorMessage() throws FileNotFoundException { /* Get singletong instance of File Logger Module */ final FileLoggerModule fileLoggerModule = FileLoggerModule.getSingleton(); /* Prepare the essential sub modules, to perform the sequence of jobs */ fileLoggerModule.prepare(); /* Test if nothing is printed in file */ assertEquals(readFirstLine(ERROR_FILE), null); /* Unprepare to cleanup the modules */ fileLoggerModule.unprepare(); } /** * Utility method to read first line of a file * * @param file as file name to be read * @return a string value as first line in file */ private static final String readFirstLine(final String file) { String firstLine = null; BufferedReader bufferedReader = null; try { /* Create a buffered reader */ bufferedReader = new BufferedReader(new FileReader(file)); while (bufferedReader.ready()) { /* Read the line */ firstLine = bufferedReader.readLine(); } LOGGER.info("ModuleTest::readFirstLine() : firstLine : " + firstLine); } catch (final IOException e) { LOGGER.error("ModuleTest::readFirstLine()", e); } finally { if (bufferedReader != null) { try { bufferedReader.close(); } catch (final IOException e) { LOGGER.error("ModuleTest::readFirstLine()", e); } } } return firstLine; } } java-design-patterns-1.18.0/monad/000077500000000000000000000000001322244523500167275ustar00rootroot00000000000000java-design-patterns-1.18.0/monad/README.md000066400000000000000000000022231322244523500202050ustar00rootroot00000000000000--- layout: pattern title: Monad folder: monad permalink: /patterns/monad/ categories: Other tags: - Java - Difficulty-Expert - Functional --- ## Intent Monad pattern based on monad from linear algebra represents the way of chaining operations together step by step. Binding functions can be described as passing one's output to another's input basing on the 'same type' contract. Formally, monad consists of a type constructor M and two operations: bind - that takes monadic object and a function from plain object to monadic value and returns monadic value return - that takes plain type object and returns this object wrapped in a monadic value. ![alt text](./etc/monad.png "Monad") ## Applicability Use the Monad in any of the following situations * when you want to chain operations easily * when you want to apply each function regardless of the result of any of them ## Credits * [Design Pattern Reloaded by Remi Forax](https://youtu.be/-k2X7guaArU) * [Brian Beckman: Don't fear the Monad](https://channel9.msdn.com/Shows/Going+Deep/Brian-Beckman-Dont-fear-the-Monads) * [Monad on Wikipedia](https://en.wikipedia.org/wiki/Monad_(functional_programming))java-design-patterns-1.18.0/monad/etc/000077500000000000000000000000001322244523500175025ustar00rootroot00000000000000java-design-patterns-1.18.0/monad/etc/monad.png000066400000000000000000001003021322244523500213020ustar00rootroot00000000000000PNG  IHDRv'ZSIDATx} | G?/{$Qq!$.!TiDnDTB%!*J(*!%zqW_MѺSB9ü۳{NNngO~gvvfvfΞٝJ IK%+@BBBBBB !ABBBBBBb \ j@)3DGmBʦ*w(T / :MUw7qPrMU A An`4 9:q^u (rJA(BΝ_-O۴i&M& ʊk%K0  RDW6]Môi.꫍#K] ۷!aāBi(_oBфB# ʢ»]Ag|_e#m)aw0ܿbŤƍ\'RBo<ͭ [7aJ?vl,޽d/mfV̓<F𷵵_ecPmTյ. d# ʢb)i8i3a€5?'+4NANN@ "7Rk͐MqȚ eZO>YЩ[.^nmmqNi +njQhHR(nؠA+_FRBm!aZع#pU& \@/\H4 @Hݽ{L;;۷&zx֍+l w/HHM]1@6 AsШ# ||)iK 8aeޞ..11S=:?ܹ#4WV $vwwa :m h&cmHcOB˖iYÜlm-Ǐ ,A2TM@Cb$(Jtl-&c{lh{:ȸ oUem}: "S JAdkLmРٳFD$ZgwN 7^JcPmT^reQN@)iKi q SO^[[Kh{y5p]pUu/({~]XXO2y:669s(+l ruP1 i7` ʵ(;Р#e#m)&Qpaצo:dȋԆ$cǏzJC0}TT7P*AWFڢsTl7@0) 96 R6U8@@ʦ*  7@0HTAF)@@ hh eSs N=Ɛ^_PxbrQreS0 :qz ۄF8g/ \ҰȎx ` dAn$jV6 qFXO<+dv++}ßѣL sD.]W\Fȑ5(dnzھJ{$'1wʡf7Pl>H<8x+*[!-m)3GQJ9'sgL?a~콳yq7xg߱#1ڹ비g,_>㏧I9uB_~445k:2>~&мyC;~[մ>[lW պbHY !: ЩJ4W&ΡOy̦؝?+,M;)¿y8,UZƍ,7V7l 5ի ռvmK#:y0wl߾EL1-j4ht z(sV_~E޽{e˗''g G;w~„1rbcУ+(ǀYZHmÆUTuHY(s`."naaަ۔)907G!e[9: \׷_՛7G2FQuu tBOBwP=V Ѝ ?i &>0(n]xw֬) yzush!VY%C&ˢp$]嗛1 8z53*8lڴ>۲h8VͭW_m4!z  kZj̝;Ru$w/=:zl+NY[[~'JN7Pu gXYU8q 87,-h]n..,\8V rפ: DF o<=Ivܙjm)t7q&wy=V)`:1{9 J_Ȁ6axgw:v@8))^:N\܌O>Y0(aXYr45k?~68SoS.1=8Ĭ ]z ύ Udl:aXuf/#9`g̙C euYع#/bzR2_n }Kmp3JpR6( A1*M< Ⱦ}pRWSLs(0َ,mU~Jy&-h7V.  脞ھ=iSljrm&(ٟ Vt%))u`]ۇCAfmm-٩8{{kF??3 :8Ǎ""8Vc(_*:@IPԁ\Zߔ(`O 8b%,,m2f>y -TVNe+df~q; pTz K\͔vOBwPn9w>m<{|x4k0axqX+AᥗꘙUyWW ŪW&K/9:'qCOQb' 2ėY'^;x=f~V9 CS6m<` EȠh)ߋ=5ӧ0ml, ?Zd{W8~qt/Sي0$&X0 " S 韞S9']?툙)a?w/M Z6Oaݺ'D aLiZ|ŏ9jvi7w=ejժcc0㥜mh|wڠN7Pu _[yC2glvvVZCHiV^Ne+ܽ{zus`̘ GVxM VLs(h9=z,8|{sR#\_ƍzeAjb"+|_VYg 3gz%++NxͭJ` IN^(<m/. 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8Cf!s03{~;X24L)L5s4.{7sePbH8:Z2Glہӷo,sPP7 GBYUVML gRvX#v_ZJcҢ\]ioUUENƬuԠMdhM03}N9[CshbB栢x1nPjlρZnn^YPvG==¢=Ppq׳n*)ia[''k77d  ,!m"s@k)CR]]+LMm!s0H2S 8{̱b kvК`Jgm>$ D)!sH9@tR24 D)!sH9@tR24 D)iiqЈ]xO hm06xCs03di2S 8Cf!s0' nF-7Kz5EBaJg>svxԤI/ D)599~g |&u*/s瘰^YYƲe vAW3wwzvqV!tT D)59tVFE>_MԩA],AWd*?|x[#R(dp\^7\X'mRJAtLjחkdԮ"KKSiLZZ=ʳ٘I{̌oQ,N}}B!s02nj1^+c;^Qga,\\tuull:JJZhh͡$zÃBBh^^/la EqFws_P :L)LgH?3FgGQ6Y]] VK**r5v4ɗӣ6 D)i[?`+KXY<8}R{@+W2/)dp}V\矏dd4pO.dp=s2S 8Cf!s03di2S 8Cf!s03di2S 8jD.6RW@2{60RIENDB`java-design-patterns-1.18.0/monad/etc/monad.ucls000066400000000000000000000070721322244523500214760ustar00rootroot00000000000000 java-design-patterns-1.18.0/monad/pom.xml000066400000000000000000000037641322244523500202560ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 monad org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/monad/src/000077500000000000000000000000001322244523500175165ustar00rootroot00000000000000java-design-patterns-1.18.0/monad/src/main/000077500000000000000000000000001322244523500204425ustar00rootroot00000000000000java-design-patterns-1.18.0/monad/src/main/java/000077500000000000000000000000001322244523500213635ustar00rootroot00000000000000java-design-patterns-1.18.0/monad/src/main/java/com/000077500000000000000000000000001322244523500221415ustar00rootroot00000000000000java-design-patterns-1.18.0/monad/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500237715ustar00rootroot00000000000000java-design-patterns-1.18.0/monad/src/main/java/com/iluwatar/monad/000077500000000000000000000000001322244523500250675ustar00rootroot00000000000000java-design-patterns-1.18.0/monad/src/main/java/com/iluwatar/monad/App.java000066400000000000000000000056141322244523500264600ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.monad; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.Objects; import java.util.function.Function; import java.util.function.Predicate; /** * The Monad pattern defines a monad structure, that enables chaining operations * in pipelines and processing data step by step. * Formally, monad consists of a type constructor M and two operations: *
bind - that takes monadic object and a function from plain object to the * monadic value and returns monadic value. *
return - that takes plain type object and returns this object wrapped in a monadic value. *

* In the given example, the Monad pattern is represented as a {@link Validator} that takes an instance * of a plain object with {@link Validator#of(Object)} * and validates it {@link Validator#validate(Function, Predicate, String)} against given predicates. *

As a validation result {@link Validator#get()} it either returns valid object {@link Validator#t} * or throws a list of exceptions {@link Validator#exceptions} collected during validation. */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point. * * @param args @param args command line args */ public static void main(String[] args) { User user = new User("user", 24, Sex.FEMALE, "foobar.com"); LOGGER.info(Validator.of(user).validate(User::getName, Objects::nonNull, "name is null") .validate(User::getName, name -> !name.isEmpty(), "name is empty") .validate(User::getEmail, email -> !email.contains("@"), "email doesn't containt '@'") .validate(User::getAge, age -> age > 20 && age < 30, "age isn't between...").get().toString()); } } java-design-patterns-1.18.0/monad/src/main/java/com/iluwatar/monad/Sex.java000066400000000000000000000023761322244523500265010ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.monad; /** * Enumeration of Types of Sex */ public enum Sex { MALE, FEMALE } java-design-patterns-1.18.0/monad/src/main/java/com/iluwatar/monad/User.java000066400000000000000000000034531322244523500266550ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.monad; /** * User Definition */ public class User { private String name; private int age; private Sex sex; private String email; /** * @param name - name * @param age - age * @param sex - sex * @param email - email address */ public User(String name, int age, Sex sex, String email) { this.name = name; this.age = age; this.sex = sex; this.email = email; } public String getName() { return name; } public int getAge() { return age; } public Sex getSex() { return sex; } public String getEmail() { return email; } } java-design-patterns-1.18.0/monad/src/main/java/com/iluwatar/monad/Validator.java000066400000000000000000000101431322244523500276560ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.monad; import java.util.ArrayList; import java.util.List; import java.util.Objects; import java.util.function.Function; import java.util.function.Predicate; /** * Class representing Monad design pattern. Monad is a way of chaining operations on the * given object together step by step. In Validator each step results in either success or * failure indicator, giving a way of receiving each of them easily and finally getting * validated object or list of exceptions. * * @param Placeholder for an object. */ public class Validator { /** * Object that is validated */ private final T t; /** * List of exception thrown during validation. */ private final List exceptions = new ArrayList<>(); /** * Creates a monadic value of given object. * @param t object to be validated */ private Validator(T t) { this.t = t; } /** * Creates validator against given object * * @param t object to be validated * @param object's type * @return new instance of a validator */ public static Validator of(T t) { return new Validator<>(Objects.requireNonNull(t)); } /** * @param validation one argument boolean-valued function that * represents one step of validation. Adds exception to main validation exception * list when single step validation ends with failure. * @param message error message when object is invalid * @return this */ public Validator validate(Predicate validation, String message) { if (!validation.test(t)) { exceptions.add(new IllegalStateException(message)); } return this; } /** * Extension for the {@link Validator#validate(Function, Predicate, String)} method, * dedicated for objects, that need to be projected before requested validation. * * @param projection function that gets an objects, and returns projection representing * element to be validated. * @param validation see {@link Validator#validate(Function, Predicate, String)} * @param message see {@link Validator#validate(Function, Predicate, String)} * @param see {@link Validator#validate(Function, Predicate, String)} * @return this */ public Validator validate(Function projection, Predicate validation, String message) { return validate(projection.andThen(validation::test)::apply, message); } /** * Receives validated object or throws exception when invalid. * * @return object that was validated * @throws IllegalStateException when any validation step results with failure */ public T get() throws IllegalStateException { if (exceptions.isEmpty()) { return t; } IllegalStateException e = new IllegalStateException(); exceptions.forEach(e::addSuppressed); throw e; } } java-design-patterns-1.18.0/monad/src/test/000077500000000000000000000000001322244523500204755ustar00rootroot00000000000000java-design-patterns-1.18.0/monad/src/test/java/000077500000000000000000000000001322244523500214165ustar00rootroot00000000000000java-design-patterns-1.18.0/monad/src/test/java/com/000077500000000000000000000000001322244523500221745ustar00rootroot00000000000000java-design-patterns-1.18.0/monad/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500240245ustar00rootroot00000000000000java-design-patterns-1.18.0/monad/src/test/java/com/iluwatar/monad/000077500000000000000000000000001322244523500251225ustar00rootroot00000000000000java-design-patterns-1.18.0/monad/src/test/java/com/iluwatar/monad/AppTest.java000066400000000000000000000025041322244523500273460ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.monad; import org.junit.jupiter.api.Test; /** * Application Test */ public class AppTest { @Test public void testMain() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/monad/src/test/java/com/iluwatar/monad/MonadTest.java000066400000000000000000000050061322244523500276640ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.monad; import org.junit.jupiter.api.Test; import java.util.Objects; import static org.junit.jupiter.api.Assertions.assertSame; import static org.junit.jupiter.api.Assertions.assertThrows; /** * Test for Monad Pattern */ public class MonadTest { @Test public void testForInvalidName() { User tom = new User(null, 21, Sex.MALE, "tom@foo.bar"); assertThrows(IllegalStateException.class, () -> { Validator.of(tom).validate(User::getName, Objects::nonNull, "name cannot be null").get(); }); } @Test public void testForInvalidAge() { User john = new User("John", 17, Sex.MALE, "john@qwe.bar"); assertThrows(IllegalStateException.class, () -> { Validator.of(john).validate(User::getName, Objects::nonNull, "name cannot be null") .validate(User::getAge, age -> age > 21, "user is underaged") .get(); }); } @Test public void testForValid() { User sarah = new User("Sarah", 42, Sex.FEMALE, "sarah@det.org"); User validated = Validator.of(sarah).validate(User::getName, Objects::nonNull, "name cannot be null") .validate(User::getAge, age -> age > 21, "user is underaged") .validate(User::getSex, sex -> sex == Sex.FEMALE, "user is not female") .validate(User::getEmail, email -> email.contains("@"), "email does not contain @ sign") .get(); assertSame(validated, sarah); } } java-design-patterns-1.18.0/monostate/000077500000000000000000000000001322244523500176425ustar00rootroot00000000000000java-design-patterns-1.18.0/monostate/README.md000066400000000000000000000015631322244523500211260ustar00rootroot00000000000000--- layout: pattern title: MonoState folder: monostate permalink: /patterns/monostate/ categories: Creational tags: - Java - Difficulty-Beginner --- ## Also known as Borg ## Intent Enforces a behaviour like sharing the same state amongst all instances. ![alt text](./etc/monostate.png "MonoState") ## Applicability Use the Monostate pattern when * The same state must be shared across all instances of a class. * Typically this pattern might be used everywhere a Singleton might be used. Singleton usage however is not transparent, Monostate usage is. * Monostate has one major advantage over singleton. 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.monostate; /** * * The MonoState pattern ensures that all instances of the class will have the same state. This can * be used a direct replacement of the Singleton pattern. * *

* In the following example, The {@link LoadBalancer} class represents the app's logic. It contains * a series of Servers, which can handle requests of type {@link Request}. Two instances of * LoadBalacer are created. When a request is made to a server via the first LoadBalancer the state * change in the first load balancer affects the second. So if the first LoadBalancer selects the * Server 1, the second LoadBalancer on a new request will select the Second server. If a third * LoadBalancer is created and a new request is made to it, then it will select the third server as * the second load balancer has already selected the second server. *

* . * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { LoadBalancer loadBalancer1 = new LoadBalancer(); LoadBalancer loadBalancer2 = new LoadBalancer(); loadBalancer1.serverRequest(new Request("Hello")); loadBalancer2.serverRequest(new Request("Hello World")); } } java-design-patterns-1.18.0/monostate/src/main/java/com/iluwatar/monostate/LoadBalancer.java000066400000000000000000000047441322244523500321000ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.monostate; import java.util.ArrayList; import java.util.List; /** * The LoadBalancer class. This implements the MonoState pattern. It holds a series of servers. Upon * receiving a new Request, it delegates the call to the servers in a Round Robin Fashion. Since all * instances of the class share the same state, all instances will delegate to the same server on * receiving a new Request. * */ public class LoadBalancer { private static List servers = new ArrayList<>(); private static int lastServedId; static { int id = 0; servers.add(new Server("localhost", 8081, ++id)); servers.add(new Server("localhost", 8080, ++id)); servers.add(new Server("localhost", 8082, ++id)); servers.add(new Server("localhost", 8083, ++id)); servers.add(new Server("localhost", 8084, ++id)); } /** * Add new server */ public final void addServer(Server server) { synchronized (servers) { servers.add(server); } } public final int getNoOfServers() { return servers.size(); } public static int getLastServedId() { return lastServedId; } /** * Handle request */ public synchronized void serverRequest(Request request) { if (lastServedId >= servers.size()) { lastServedId = 0; } Server server = servers.get(lastServedId++); server.serve(request); } } java-design-patterns-1.18.0/monostate/src/main/java/com/iluwatar/monostate/Request.java000066400000000000000000000025531322244523500312150ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.monostate; /** * * The Request class. A {@link Server} can handle an instance of a Request. * */ public class Request { public final String value; public Request(String value) { this.value = value; } } java-design-patterns-1.18.0/monostate/src/main/java/com/iluwatar/monostate/Server.java000066400000000000000000000037221322244523500310320ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.monostate; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * The Server class. Each Server sits behind a LoadBalancer which delegates the call to the servers * in a simplistic Round Robin fashion. * */ public class Server { private static final Logger LOGGER = LoggerFactory.getLogger(Server.class); public final String host; public final int port; public final int id; /** * Constructor */ public Server(String host, int port, int id) { this.host = host; this.port = port; this.id = id; } public String getHost() { return host; } public int getPort() { return port; } public void serve(Request request) { LOGGER.info("Server ID {} associated to host : {} and port {}. Processed request with value {}", id, host, port, request.value); } } java-design-patterns-1.18.0/monostate/src/test/000077500000000000000000000000001322244523500214105ustar00rootroot00000000000000java-design-patterns-1.18.0/monostate/src/test/java/000077500000000000000000000000001322244523500223315ustar00rootroot00000000000000java-design-patterns-1.18.0/monostate/src/test/java/com/000077500000000000000000000000001322244523500231075ustar00rootroot00000000000000java-design-patterns-1.18.0/monostate/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500247375ustar00rootroot00000000000000java-design-patterns-1.18.0/monostate/src/test/java/com/iluwatar/monostate/000077500000000000000000000000001322244523500267505ustar00rootroot00000000000000java-design-patterns-1.18.0/monostate/src/test/java/com/iluwatar/monostate/AppTest.java000066400000000000000000000025161322244523500311770ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.monostate; import org.junit.jupiter.api.Test; /** * Application Test Entry */ public class AppTest { @Test public void testMain() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/monostate/src/test/java/com/iluwatar/monostate/LoadBalancerTest.java000066400000000000000000000054771322244523500327770ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.monostate; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertTrue; import static org.mockito.Matchers.any; import static org.mockito.Mockito.doNothing; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; import static org.mockito.Mockito.when; /** * Date: 12/21/15 - 12:26 PM * * @author Jeroen Meulemeester */ public class LoadBalancerTest { @Test public void testSameStateAmongstAllInstances() { final LoadBalancer firstBalancer = new LoadBalancer(); final LoadBalancer secondBalancer = new LoadBalancer(); firstBalancer.addServer(new Server("localhost", 8085, 6)); // Both should have the same number of servers. assertTrue(firstBalancer.getNoOfServers() == secondBalancer.getNoOfServers()); // Both Should have the same LastServedId assertTrue(firstBalancer.getLastServedId() == secondBalancer.getLastServedId()); } @Test public void testServe() { final Server server = mock(Server.class); when(server.getHost()).thenReturn("testhost"); when(server.getPort()).thenReturn(1234); doNothing().when(server).serve(any(Request.class)); final LoadBalancer loadBalancer = new LoadBalancer(); loadBalancer.addServer(server); verifyZeroInteractions(server); final Request request = new Request("test"); for (int i = 0; i < loadBalancer.getNoOfServers() * 2; i++) { loadBalancer.serverRequest(request); } verify(server, times(2)).serve(request); verifyNoMoreInteractions(server); } } java-design-patterns-1.18.0/multiton/000077500000000000000000000000001322244523500175045ustar00rootroot00000000000000java-design-patterns-1.18.0/multiton/README.md000066400000000000000000000007711322244523500207700ustar00rootroot00000000000000--- layout: pattern title: Multiton folder: multiton permalink: /patterns/multiton/ categories: Creational tags: - Java - Difficulty-Beginner --- ## Also known as Registry ## Intent Ensure a class only has limited number of instances, and provide a global point of access to them. ![alt text](./etc/multiton.png "Multiton") ## Applicability Use the Multiton pattern when * there must be specific number of instances of a class, and they must be accessible to clients from a well-known access point java-design-patterns-1.18.0/multiton/etc/000077500000000000000000000000001322244523500202575ustar00rootroot00000000000000java-design-patterns-1.18.0/multiton/etc/multiton.png000066400000000000000000000246151322244523500226500ustar00rootroot00000000000000PNG  IHDR&)TIDATx[eEw4>΃53(zZ4dP`ڃ84#ni lQg A.eOЇd20Ĵ8RU_շn{ZZ/.UU)&M]DUڰA*\Kt|PP[ Q 肠 *kmy8X?g /uy, 1`@$~Dž~e4Ͽ0^sw!Apy-6 tY:~ϪEGx4r+̝M;uFQbayQʴ*:6z $B$NGZ(凒]1>!*kㅰn!6E{I9Mڙt$]O>,hX|-gː?IXʼn<ݩ]eKo`[v?Dd0%W{."sWKtJ3T ~!9Z4>~YivB?WdDz'ё N-GWT_n*xEStr䄓3@U%AU tAPU]T@U%AU tAPU]?>|W\"Ş kw >ru!~ώs~#cyyFw: tXw|'nΏ/&/q& MlU@W[%^sƟ|K/Lk"tpP.ه~^㉟|Glztgn~HkХ/4sHģCcc Rڪ3v_r%x׿/L{gqЅ^&r|i` 6԰6݈Hv5<t]mhm/nHHlgYy]gG|e <&ҲŖucdiѯ9A!Vzo;wGtyBxcG<7suתrm1tigʥ9Vf-CFTvw׏^XYUc_<+i{OR9Zn &қrtU/;}/|gɈPD1Wcz얡]m>%{N3;o}Sl-\l=JJECMdƌ4ګ1\ЀqvK t grm-{(ZlGUTm&j0AuV5(6Z;3t7K4h"~|ݾoIq ;7.h.q23Sg[ WFs肠 *.J 肠 *,`_ tA*vIW|ԗZA]w1ŗuɐU55\sq4Ű)""ew2V=$AW{rhVAWF3I1?v[=j ֊jU9sW/" 25/]ZNE:, ,tK SJfcfNh0 Ժ Uն]P *.J 肠 *uu ~( R*PwA>jб tAtAPU]TFz5z5 * :Vw..J}kz߶|o|sQ=Ӟ0jF=.$PdDS)5+ӓG36u\w-NiKkG>_PugKMy/tM^ѵ?\}]>%+udkYzH'.%[!{(|]n|Twf8zDSpͯsϹHb1_K UV?әtCCwoo嵥ז.۫ڐH<]>nh:1tZr]PEz_vWu=$(z'VE==<μt5syI7뽕q?s[$wT/8u%(jQgtуek%X=nVYWgغv|ޒ=$|նBRŮX=!h]DNJm5=T5kN tAPU]TLw>Fpt%.UxTuIK?K5]nZ.ks6s^%p0eRémvn]Skg%1-=]}7;7zD9¥^#6D Fp4gK= ?xH^*cMiO9oҩcۛfg5wO~ l{Ƚ_N-<U㏨U>u&zevn]7<Ž/4)~;IZ-J~0bƠH؟)֩@Իn]k_75%qnk]#~_N='ҫG:]Øl$L%ocssSﺟtm9x.]lbԽKb'Iˮ>L1]sU?w;)]: _څ$KZ G"y!թrfG]jf uȑI7m۶ӂXZZ*QCk2 |X Vٍ2|HƷ-a߰aCSHݻC~_ꨝ.f1ː[u#G9x7YQnc>oo`%_yeȭQ2zBW\UpLvxIWib&zD't/s9P)IwMd.n%!##?]z.DZt.,2a7_B+]ZF3=#Z}Kk mgB.zAWGtܷ]80 !Eq. 2PB@Qp !Eq. ucǎ_uE )ƶmv-ūM‹]e^[~$]b/^m rz%BŅ]BBPq!U+ b \]a.gV_.T\0@/A*.De*KЅ F6lx':1WT]$ 5B z0 tAtT袩 r'ESANIp8qy6;ܝw݄@M ]Zﭸ@MC|9,kW,ESkk%vao^DA1Z1_kFft'W zÇay/oaVUr]gfiQ^YZE7+?^FDRTRgM+YBxEuck䯵2GnU/5oxCWR9+bC 9y/Rꮈn\% }]]x7<.~[`Iy!9s5w)} 9ao%=wrgXYxKWT{V2-_f)ͭ55 ghߪW]4+ tT袩 r'ESAN.ȝ@M];. w]4K^uGj=:Pl=)ESP=zםJlm]b?͌%yކc-5&ES=K ?{`w\f) ]MRc]4'DOZOwB?Q<-QLk"ʢ}[jLD7tηoX~sg|fZF:O+ʺ̱CE>n}i[ w#UɱI@M{|_8[7|T(Ň D%r " 4/n楑?NFٚ-䬈GOF+ytUmK4v_λ.z2+/\zEW]0eN q2*׸ѥ&)L+1n .]^gɡBZ{!& suת)ڳ+ T*,4sU□Y'뷚LǠKF[m?Q;ơPH׿>rkԡnfXn!-+t%.}z֣WO_D׫? 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.multiton; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Whereas Singleton design pattern introduces single globally accessible object the Multiton * pattern defines many globally accessible objects. The client asks for the correct instance from * the Multiton by passing an enumeration as parameter. *

* In this example {@link Nazgul} is the Multiton and we can ask single {@link Nazgul} from it using * {@link NazgulName}. The {@link Nazgul}s are statically initialized and stored in concurrent hash * map. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args command line args */ public static void main(String[] args) { LOGGER.info("KHAMUL={}", Nazgul.getInstance(NazgulName.KHAMUL)); LOGGER.info("MURAZOR={}", Nazgul.getInstance(NazgulName.MURAZOR)); LOGGER.info("DWAR={}", Nazgul.getInstance(NazgulName.DWAR)); LOGGER.info("JI_INDUR={}", Nazgul.getInstance(NazgulName.JI_INDUR)); LOGGER.info("AKHORAHIL={}", Nazgul.getInstance(NazgulName.AKHORAHIL)); LOGGER.info("HOARMURATH={}", Nazgul.getInstance(NazgulName.HOARMURATH)); LOGGER.info("ADUNAPHEL={}", Nazgul.getInstance(NazgulName.ADUNAPHEL)); LOGGER.info("REN={}", Nazgul.getInstance(NazgulName.REN)); LOGGER.info("UVATHA={}", Nazgul.getInstance(NazgulName.UVATHA)); } } java-design-patterns-1.18.0/multiton/src/main/java/com/iluwatar/multiton/Nazgul.java000066400000000000000000000044571322244523500305360ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.multiton; import java.util.Map; import java.util.concurrent.ConcurrentHashMap; /** * * Nazgul is a Multiton class. Nazgul instances can be queried using {@link #getInstance} method. * */ public final class Nazgul { private static Map nazguls; private NazgulName name; static { nazguls = new ConcurrentHashMap<>(); nazguls.put(NazgulName.KHAMUL, new Nazgul(NazgulName.KHAMUL)); nazguls.put(NazgulName.MURAZOR, new Nazgul(NazgulName.MURAZOR)); nazguls.put(NazgulName.DWAR, new Nazgul(NazgulName.DWAR)); nazguls.put(NazgulName.JI_INDUR, new Nazgul(NazgulName.JI_INDUR)); nazguls.put(NazgulName.AKHORAHIL, new Nazgul(NazgulName.AKHORAHIL)); nazguls.put(NazgulName.HOARMURATH, new Nazgul(NazgulName.HOARMURATH)); nazguls.put(NazgulName.ADUNAPHEL, new Nazgul(NazgulName.ADUNAPHEL)); nazguls.put(NazgulName.REN, new Nazgul(NazgulName.REN)); nazguls.put(NazgulName.UVATHA, new Nazgul(NazgulName.UVATHA)); } private Nazgul(NazgulName name) { this.name = name; } public static Nazgul getInstance(NazgulName name) { return nazguls.get(name); } public NazgulName getName() { return name; } } java-design-patterns-1.18.0/multiton/src/main/java/com/iluwatar/multiton/NazgulName.java000066400000000000000000000025101322244523500313230ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.multiton; /** * * Each Nazgul has different {@link NazgulName}. * */ public enum NazgulName { KHAMUL, MURAZOR, DWAR, JI_INDUR, AKHORAHIL, HOARMURATH, ADUNAPHEL, REN, UVATHA; } java-design-patterns-1.18.0/multiton/src/test/000077500000000000000000000000001322244523500212525ustar00rootroot00000000000000java-design-patterns-1.18.0/multiton/src/test/java/000077500000000000000000000000001322244523500221735ustar00rootroot00000000000000java-design-patterns-1.18.0/multiton/src/test/java/com/000077500000000000000000000000001322244523500227515ustar00rootroot00000000000000java-design-patterns-1.18.0/multiton/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500246015ustar00rootroot00000000000000java-design-patterns-1.18.0/multiton/src/test/java/com/iluwatar/multiton/000077500000000000000000000000001322244523500264545ustar00rootroot00000000000000java-design-patterns-1.18.0/multiton/src/test/java/com/iluwatar/multiton/AppTest.java000066400000000000000000000025111322244523500306760ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.multiton; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/multiton/src/test/java/com/iluwatar/multiton/NazgulTest.java000066400000000000000000000035471322244523500314300ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.multiton; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertSame; /** * Date: 12/22/15 - 22:28 AM * * @author Jeroen Meulemeester */ public class NazgulTest { /** * Verify if {@link Nazgul#getInstance(NazgulName)} returns the correct Nazgul multiton instance */ @Test public void testGetInstance() { for (final NazgulName name : NazgulName.values()) { final Nazgul nazgul = Nazgul.getInstance(name); assertNotNull(nazgul); assertSame(nazgul, Nazgul.getInstance(name)); assertEquals(name, nazgul.getName()); } } } java-design-patterns-1.18.0/mute-idiom/000077500000000000000000000000001322244523500177025ustar00rootroot00000000000000java-design-patterns-1.18.0/mute-idiom/README.md000066400000000000000000000014111322244523500211560ustar00rootroot00000000000000--- layout: pattern title: Mute Idiom folder: mute-idiom permalink: /patterns/mute-idiom/ categories: Other tags: - Java - Difficulty-Beginner - Idiom --- ## Intent Provide a template to suppress any exceptions that either are declared but cannot occur or should only be logged; while executing some business logic. The template removes the need to write repeated `try-catch` blocks. ![alt text](./etc/mute-idiom.png "Mute Idiom") ## Applicability Use this idiom when * an API declares some exception but can never throw that exception eg. ByteArrayOutputStream bulk write method. * you need to suppress some exception just by logging it, such as closing a resource. ## Credits * [JOOQ: Mute Design Pattern](http://blog.jooq.org/2016/02/18/the-mute-design-pattern/) java-design-patterns-1.18.0/mute-idiom/etc/000077500000000000000000000000001322244523500204555ustar00rootroot00000000000000java-design-patterns-1.18.0/mute-idiom/etc/mute-idiom.png000066400000000000000000000441111322244523500232350ustar00rootroot00000000000000PNG  IHDRŤHIDATx \mُ/ff!\BDmB1"ZHB̰f73Œ3ߝ}ϩu9=9y[S1 !b>By^(2Bɋb27EFB(2BTEFz(2S0uԼR{/_-[g'..-Z4)&?" 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mute; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.sql.SQLException; /** * Mute pattern is utilized when we need to suppress an exception due to an API flaw or in * situation when all we can do to handle the exception is to log it. * This pattern should not be used everywhere. It is very important to logically handle the * exceptions in a system, but some situations like the ones described above require this pattern, * so that we don't need to repeat * 

 * 
 *   try {
 *     // code that may throwing exception we need to ignore or may never be thrown
 *   } catch (Exception ex) {
 *     // ignore by logging or throw error if unexpected exception occurs
 *   }
 * 
 *
every time we need to ignore an exception. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point. * * @param args command line args. * @throws Exception if any exception occurs */ public static void main(String[] args) throws Exception { useOfLoggedMute(); useOfMute(); } /* * Typically used when the API declares some exception but cannot do so. Usually a * signature mistake.In this example out is not supposed to throw exception as it is a * ByteArrayOutputStream. So we utilize mute, which will throw AssertionError if unexpected * exception occurs. */ private static void useOfMute() { ByteArrayOutputStream out = new ByteArrayOutputStream(); Mute.mute(() -> out.write("Hello".getBytes())); } private static void useOfLoggedMute() throws SQLException { Resource resource = null; try { resource = acquireResource(); utilizeResource(resource); } finally { closeResource(resource); } } /* * All we can do while failed close of a resource is to log it. */ private static void closeResource(Resource resource) { Mute.loggedMute(() -> resource.close()); } private static void utilizeResource(Resource resource) throws SQLException { LOGGER.info("Utilizing acquired resource: {}", resource); } private static Resource acquireResource() throws SQLException { return new Resource() { @Override public void close() throws IOException { throw new IOException("Error in closing resource: " + this); } }; } } java-design-patterns-1.18.0/mute-idiom/src/main/java/com/iluwatar/mute/CheckedRunnable.java000066400000000000000000000026761322244523500316110ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mute; /** * A runnable which may throw exception on execution. * */ @FunctionalInterface public interface CheckedRunnable { /** * Same as {@link Runnable#run()} with a possibility of exception in execution. * @throws Exception if any exception occurs. */ void run() throws Exception; } java-design-patterns-1.18.0/mute-idiom/src/main/java/com/iluwatar/mute/Mute.java000066400000000000000000000052331322244523500274760ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mute; import java.io.ByteArrayOutputStream; import java.io.IOException; /** * A utility class that allows you to utilize mute idiom. */ public final class Mute { // The constructor is never meant to be called. private Mute() {} /** * Executes the runnable and throws the exception occurred within a {@link AssertionError}. * This method should be utilized to mute the operations that are guaranteed not to throw an exception. * For instance {@link ByteArrayOutputStream#write(byte[])} declares in it's signature that it can throw * an {@link IOException}, but in reality it cannot. This is because the bulk write method is not overridden * in {@link ByteArrayOutputStream}. * * @param runnable a runnable that should never throw an exception on execution. */ public static void mute(CheckedRunnable runnable) { try { runnable.run(); } catch (Exception e) { throw new AssertionError(e); } } /** * Executes the runnable and logs the exception occurred on {@link System#err}. * This method should be utilized to mute the operations about which most you can do is log. * For instance while closing a connection to database, or cleaning up a resource, * all you can do is log the exception occurred. * * @param runnable a runnable that may throw an exception on execution. */ public static void loggedMute(CheckedRunnable runnable) { try { runnable.run(); } catch (Exception e) { e.printStackTrace(); } } } java-design-patterns-1.18.0/mute-idiom/src/main/java/com/iluwatar/mute/Resource.java000066400000000000000000000026521322244523500303550ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mute; import java.io.Closeable; /** * Represents any resource that the application might acquire and that must be closed * after it is utilized. Example of such resources can be a database connection, open * files, sockets. */ public interface Resource extends Closeable { } java-design-patterns-1.18.0/mute-idiom/src/test/000077500000000000000000000000001322244523500214505ustar00rootroot00000000000000java-design-patterns-1.18.0/mute-idiom/src/test/java/000077500000000000000000000000001322244523500223715ustar00rootroot00000000000000java-design-patterns-1.18.0/mute-idiom/src/test/java/com/000077500000000000000000000000001322244523500231475ustar00rootroot00000000000000java-design-patterns-1.18.0/mute-idiom/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500247775ustar00rootroot00000000000000java-design-patterns-1.18.0/mute-idiom/src/test/java/com/iluwatar/mute/000077500000000000000000000000001322244523500257515ustar00rootroot00000000000000java-design-patterns-1.18.0/mute-idiom/src/test/java/com/iluwatar/mute/AppTest.java000066400000000000000000000025351322244523500302010ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mute; import org.junit.jupiter.api.Test; /** * Tests that Mute idiom example runs without errors. * */ public class AppTest { @Test public void test() throws Exception { App.main(null); } } java-design-patterns-1.18.0/mute-idiom/src/test/java/com/iluwatar/mute/MuteTest.java000066400000000000000000000053641322244523500303760ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mute; import org.junit.jupiter.api.Test; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.PrintStream; import static org.junit.jupiter.api.Assertions.assertThrows; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Test for the mute-idiom pattern */ public class MuteTest { private static final Logger LOGGER = LoggerFactory.getLogger(MuteTest.class); private static final String MESSAGE = "should not occur"; @Test public void muteShouldRunTheCheckedRunnableAndNotThrowAnyExceptionIfCheckedRunnableDoesNotThrowAnyException() { Mute.mute(() -> methodNotThrowingAnyException()); } @Test public void muteShouldRethrowUnexpectedExceptionAsAssertionError() throws Exception { assertThrows(AssertionError.class, () -> { Mute.mute(() -> methodThrowingException()); }); } @Test public void loggedMuteShouldRunTheCheckedRunnableAndNotThrowAnyExceptionIfCheckedRunnableDoesNotThrowAnyException() { Mute.loggedMute(() -> methodNotThrowingAnyException()); } @Test public void loggedMuteShouldLogExceptionTraceBeforeSwallowingIt() throws IOException { ByteArrayOutputStream stream = new ByteArrayOutputStream(); System.setErr(new PrintStream(stream)); Mute.loggedMute(() -> methodThrowingException()); assertTrue(new String(stream.toByteArray()).contains(MESSAGE)); } private void methodNotThrowingAnyException() { LOGGER.info("Executed successfully"); } private void methodThrowingException() throws Exception { throw new Exception(MESSAGE); } } java-design-patterns-1.18.0/mutex/000077500000000000000000000000001322244523500167735ustar00rootroot00000000000000java-design-patterns-1.18.0/mutex/README.md000066400000000000000000000012701322244523500202520ustar00rootroot00000000000000--- layout: pattern title: Mutex folder: mutex permalink: /patterns/mutex/ categories: Concurrency tags: - Java - Difficulty-Intermediate --- ## Also known as Mutual Exclusion Lock Binary Semaphore ## Intent Create a lock which only allows a single thread to access a resource at any one instant. ![alt text](./etc/mutex.png "Mutex") ## Applicability Use a Mutex when * you need to prevent two threads accessing a critical section at the same time * concurrent access to a resource could lead to a race condition ## Credits * [Lock (computer science)] (http://en.wikipedia.org/wiki/Lock_(computer_science)) * [Semaphores] (http://tutorials.jenkov.com/java-concurrency/semaphores.html) java-design-patterns-1.18.0/mutex/etc/000077500000000000000000000000001322244523500175465ustar00rootroot00000000000000java-design-patterns-1.18.0/mutex/etc/mutex.png000066400000000000000000000307011322244523500214170ustar00rootroot00000000000000PNG  IHDR0@-Yd1IDATxo}RDTr+T& mJ抶`BmI. ڝjqUvXy .x*0AB;AX>,= )_H$ qOiœiP1Z{EC&R! ,$(t#9 ocqDr$ݬヅ@ȿ_ H:ՠbK͕P"!bX kDZLd Yǭw# l${i2*hPQ[qqb.}9y7D* 6Ȇ3^ HY`|UT Pd/L=$[3K]AȪ$VU Ѯ t%!*1:6"鵋GKV\ѱz{ YdU ^e)C:57B$El =$ Yd{H-wUʨ]G RD2I-|gHVAȪ$jW]e)\1*v#A [F5ۋ]t{gۛ6JɞJ!H`|gZ%|sۋEvgx'wFow1VsUBh[*-QuW}~{lٽ^:&+iAt_eAh+*wI'w,'cw$X٫l5bEٙmǾ_?uW/>AO%{ uP2Al5bE]p慭]xh/g|AbwFʤ> (c|"_ H:ՠbۋ}w[]q_|?'F6n7;SN'HZ W/$Wj4T_.mKbA3R} :-O׽}n!_$.?$9/¼4,_}z{E&}z wNm'FN)T8 ?3n%H-7S`~'0RbpmqgWjj!Mo|۟H,?zltcRɝbA28sd"HGq(&,A*F/Kl[NM۾(ЮXIU|<;Iz{ YdR0/\!6no-o=]):.R8V*XO[*$A*/DHxUZ+3t߆v}y|ċoFكX!4)䢿@t\eAs!HR[%;צ/;ƤdlANx#Y0`oK~ti1ѪDWWPl5zn= h Ǹ@\$JKx{a*{D0ϒޔ1,jB?'E< A "Iڦ@t_eAs# VD;A6;VX$ )Lͺ]_>;HT@8xj[)AC,QzMdLJ V֋2(Rץ=%d]2|J)?$K?t.^ ?HN#ɔx]p>lC@t\ebֳ@qRABI Z3qArR\eb[אC "k\BsR\eQ1[ѭ#"B Vu "+/Hh]eQU D:}d$4CՔ!1 ֙[o/$LC͐*[͈(Xwo\w';b7gH-l\mU X_\\| *E֩ V*[ *F[OhD\=lIUT2RIUTn=APi-2l5cUV}Xvd=S'DMuRHZd$WjP1ƸoV%s:t" 4+ ʤji$WjA[Je'/яFa5:RABS-|pt%lYj2V,Sm}ƭl5P&''b eYP9i$WjP1Z{E]i߿e#ow}AiTX*g t<>Y*=rRBI6vu V[o/#v%_ Q,BD:4ioP>r L e~A}R!{T± (Ab%=$ڏ blU-ѝ"r}Jx g!Hhw*A N"a%)\ue=r 8Ԗ!^BR۝7Q~ Hn!UTn=Bي&A3Rϐ: 8l5IZ( *[ *FmA*DJ'$* m/!-$l5zR]Zdi ?G?~n1 H H@ /3 Z#aD*JB JkU#Ho_2 H">̈́'@BZd$WjLAGtz}_4F3^LVאi͙VI]1=swndkFy\x\T H6Ad# jc-B~iܜi㎿?~plBtʯ09 A;cjz~\BeR  q|T?Բ|Q-=TXrǙ`S HA ab B*_юnδJY㑟}3/_:JyIveĔ_q7:c:*KĒ^L(ȕL|nV Hց3'-Hyڝa<L]R/ՎjWZ;{طKSQ ~vĪLԢ$VUb‘.Q*H͚[o/Yfu r;Z EV(hG,5gZ{Og9X`%ɗR~U)HI)ړl "+&HyڝDT " NV~򉛏൹g<;G6n>O$U0]!t. 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Pۭ3Gd*:F- H4A> &SI"ijno8E*I*N)k(B\O:0 @0Gd*℉Do~AX|8B!H\"!ʨ9..#T Hc d2dD2 1CAH2z>Etetay7wi }I"$#RWr,#IIBZ i }H"IFٱ%!~z mIs&]A0d Hc L214ch/ZOV"H2,nnA;Q& }L"fA.b I'*Xp*Bor{Y{MKX?M}*0 @eC.H\OTT@I(3A'H`# ?&PrZD+NT@!0$ݗ0u/* Hz@I ɘ(}* HzI'*Xp* z'*Xp* 7p*>W!V a$T-HX14A>*J5|:T!@5:dΕSX14A>*Jkگp(ƾ+Ƃ@0GET5^wC+Ƃ:Ov@AEN5T$ ;A߰b,.*h25^%  ,AM;AXg8j PҰd*e +`=p*B-HfVrT@M HT A A A A @2,͘B @(LVIENDB`java-design-patterns-1.18.0/mutex/pom.xml000066400000000000000000000036371322244523500203210ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 mutex org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/mutex/src/000077500000000000000000000000001322244523500175625ustar00rootroot00000000000000java-design-patterns-1.18.0/mutex/src/main/000077500000000000000000000000001322244523500205065ustar00rootroot00000000000000java-design-patterns-1.18.0/mutex/src/main/java/000077500000000000000000000000001322244523500214275ustar00rootroot00000000000000java-design-patterns-1.18.0/mutex/src/main/java/com/000077500000000000000000000000001322244523500222055ustar00rootroot00000000000000java-design-patterns-1.18.0/mutex/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500240355ustar00rootroot00000000000000java-design-patterns-1.18.0/mutex/src/main/java/com/iluwatar/mutex/000077500000000000000000000000001322244523500251775ustar00rootroot00000000000000java-design-patterns-1.18.0/mutex/src/main/java/com/iluwatar/mutex/App.java000066400000000000000000000037761322244523500265770ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mutex; /** * A Mutex prevents multiple threads from accessing a resource simultaneously. *

* In this example we have two thieves who are taking beans from a jar. * Only one thief can take a bean at a time. This is ensured by a Mutex lock * which must be acquired in order to access the jar. Each thief attempts to * acquire the lock, take a bean and then release the lock. If the lock has * already been acquired, the thief will be prevented from continuing (blocked) * until the lock has been released. The thieves stop taking beans once there * are no beans left to take. */ public class App { /** * main method */ public static void main(String[] args) { Mutex mutex = new Mutex(); Jar jar = new Jar(1000, mutex); Thief peter = new Thief("Peter", jar); Thief john = new Thief("John", jar); peter.start(); john.start(); } } java-design-patterns-1.18.0/mutex/src/main/java/com/iluwatar/mutex/Jar.java000066400000000000000000000037331322244523500265640ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mutex; /** * A Jar has a resource of beans which can only be accessed by a single Thief * (thread) at any one time. A Mutex lock is used to prevent more than one Thief * taking a bean simultaneously. */ public class Jar { /** * The lock which must be acquired to access the beans resource. */ private final Lock lock; /** * The resource within the jar. */ private int beans; public Jar(int beans, Lock lock) { this.beans = beans; this.lock = lock; } /** * Method for a thief to take a bean. */ public boolean takeBean() { boolean success = false; try { lock.acquire(); success = beans > 0; if (success) { beans = beans - 1; } } catch (Exception e) { e.printStackTrace(); } finally { lock.release(); } return success; } } java-design-patterns-1.18.0/mutex/src/main/java/com/iluwatar/mutex/Lock.java000066400000000000000000000025021322244523500267310ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mutex; /** * Lock is an interface for a lock which can be acquired and released. */ public interface Lock { void acquire() throws InterruptedException; void release(); } java-design-patterns-1.18.0/mutex/src/main/java/com/iluwatar/mutex/Mutex.java000066400000000000000000000037771322244523500271620ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mutex; /** * Mutex is an implementation of a mutual exclusion lock. */ public class Mutex implements Lock { /** * The current owner of the lock. */ private Object owner; /** * Returns the current owner of the Mutex, or null if available */ public Object getOwner() { return owner; } /** * Method called by a thread to acquire the lock. If the lock has already * been acquired this will wait until the lock has been released to * re-attempt the acquire. */ @Override public synchronized void acquire() throws InterruptedException { while (owner != null) { wait(); } owner = Thread.currentThread(); } /** * Method called by a thread to release the lock. */ @Override public synchronized void release() { if (Thread.currentThread() == owner) { owner = null; notify(); } } } java-design-patterns-1.18.0/mutex/src/main/java/com/iluwatar/mutex/Thief.java000066400000000000000000000037351322244523500271110ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mutex; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Thief is a class which continually tries to acquire a jar and take a bean * from it. When the jar is empty the thief stops. */ public class Thief extends Thread { private static final Logger LOGGER = LoggerFactory.getLogger(Thief.class); /** * The name of the thief. */ private final String name; /** * The jar */ private final Jar jar; public Thief(String name, Jar jar) { this.name = name; this.jar = jar; } /** * In the run method the thief repeatedly tries to take a bean until none * are left. */ @Override public void run() { int beans = 0; while (jar.takeBean()) { beans = beans + 1; LOGGER.info("{} took a bean.", name); } LOGGER.info("{} took {} beans.", name, beans); } } java-design-patterns-1.18.0/mutex/src/test/000077500000000000000000000000001322244523500205415ustar00rootroot00000000000000java-design-patterns-1.18.0/mutex/src/test/java/000077500000000000000000000000001322244523500214625ustar00rootroot00000000000000java-design-patterns-1.18.0/mutex/src/test/java/com/000077500000000000000000000000001322244523500222405ustar00rootroot00000000000000java-design-patterns-1.18.0/mutex/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500240705ustar00rootroot00000000000000java-design-patterns-1.18.0/mutex/src/test/java/com/iluwatar/mutex/000077500000000000000000000000001322244523500252325ustar00rootroot00000000000000java-design-patterns-1.18.0/mutex/src/test/java/com/iluwatar/mutex/AppTest.java000066400000000000000000000025711322244523500274620ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mutex; import org.junit.jupiter.api.Test; import java.io.IOException; /** * Application Test Entrypoint */ public class AppTest { @Test public void test() throws IOException { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/mutex/src/test/java/com/iluwatar/mutex/JarTest.java000066400000000000000000000031261322244523500274530ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mutex; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Test case for taking beans from a Jar */ public class JarTest { @Test public void testTakeBeans() { Mutex mutex = new Mutex(); Jar jar = new Jar(10, mutex); for (int i = 0; i < 10; i++) { assertTrue(jar.takeBean()); } assertFalse(jar.takeBean()); } }java-design-patterns-1.18.0/mutex/src/test/java/com/iluwatar/mutex/MutexTest.java000066400000000000000000000034141322244523500300410ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.mutex; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNull; import static org.junit.jupiter.api.Assertions.fail; /** * Test case for acquiring and releasing a Mutex */ public class MutexTest { @Test public void acquireReleaseTest() { Mutex mutex = new Mutex(); assertNull(mutex.getOwner()); try { mutex.acquire(); assertEquals(mutex.getOwner(), Thread.currentThread()); } catch (InterruptedException e) { fail(e.toString()); } mutex.release(); assertNull(mutex.getOwner()); } }java-design-patterns-1.18.0/naked-objects/000077500000000000000000000000001322244523500203425ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/.gitattributes000066400000000000000000000013741322244523500232420ustar00rootroot00000000000000# # # text files are normalized (convert crlf => lf) # binary files are not normalized (binary is a macro for -text -diff) # # # Unless otherwise stated, assume text * text=auto *.java text diff=java *.html text diff=html *.xhtml text diff=html *.xml text *.txt text *.jar binary *.so binary *.dll binary # images *.jpg binary *.jpeg binary *.png binary *.pdn binary *.pdn binary *.cs text diff=csharp *.sln merge=union *.csproj merge=union *.vbproj merge=union *.fsproj merge=union *.dbproj merge=union *.doc diff=astextplain *.DOC diff=astextplain *.docx diff=astextplain *.DOCX diff=astextplain *.dot diff=astextplain *.DOT diff=astextplain *.pdf diff=astextplain *.PDF diff=astextplain *.rtf diff=astextplain *.RTF diff=astextplain java-design-patterns-1.18.0/naked-objects/.gitignore000066400000000000000000000006101322244523500223270ustar00rootroot00000000000000*~ *.swp *.class bin/ target/ target-ide/ logs/ .settings/ .project .classpath .idea *.iml JArchitectOut/ *.jdproj neo4j_DB/ # log files datanucleus.log isis.log i18n-po.log hs_err_pid*.log # Package Files # *.jar *.war *.ear dependency-reduced-pom.xml pom.xml.tag pom.xml.next pom.xml.releaseBackup pom.xml.versionsBackup .clover/ *.jdproj JArchitectOut/ rebel.xml /translations.pot java-design-patterns-1.18.0/naked-objects/README000066400000000000000000000002751322244523500212260ustar00rootroot00000000000000This is an Apache Isis application created with the SimpleApp archetype. The usage instructions can be found at http://isis.apache.org/guides/ug.html#_ug_getting-started_simpleapp-archetypejava-design-patterns-1.18.0/naked-objects/README.md000066400000000000000000000014651322244523500216270ustar00rootroot00000000000000--- layout: pattern title: Naked Objects folder: naked-objects permalink: /patterns/naked-objects/ categories: Architectural tags: - Java - Difficulty-Expert --- ## Intent The Naked Objects architectural pattern is well suited for rapid prototyping. Using the pattern, you only need to write the domain objects, everything else is autogenerated by the framework. ![alt text](./etc/naked-objects.png "Naked Objects") ## Applicability Use the Naked Objects pattern when * you are prototyping and need fast development cycle * an autogenerated user interface is good enough * you want to automatically publish the domain as REST services ## Real world examples * [Apache Isis](https://isis.apache.org/) ## Credits * [Richard Pawson - Naked Objects](http://downloads.nakedobjects.net/resources/Pawson%20thesis.pdf) java-design-patterns-1.18.0/naked-objects/dom/000077500000000000000000000000001322244523500211215ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/pom.xml000066400000000000000000000132401322244523500224360ustar00rootroot00000000000000 4.0.0 com.iluwatar naked-objects 1.18.0 naked-objects-dom src/main/resources src/main/java ** **/*.java org.apache.isis.core isis-core-applib org.apache.isis.core isis-core-unittestsupport test org.junit.vintage junit-vintage-engine test org.objenesis objenesis test org.assertj assertj-core test enhance true 4.0.1 org.eclipse.m2e lifecycle-mapping 1.0.0 org.datanucleus datanucleus-maven-plugin [${datanucleus-maven-plugin.version},) enhance org.datanucleus datanucleus-maven-plugin ${datanucleus-maven-plugin.version} false ${basedir}/log4j.properties true ${basedir}/datanucleus.properties process-classes enhance org.datanucleus datanucleus-core org.datanucleus datanucleus-jodatime org.datanucleus datanucleus-api-jdo isis-validate org.apache.isis.tool isis-maven-plugin 1.9.0-SNAPSHOT ../webapp/src/main/webapp/WEB-INF org.apache.isis.example.application simpleapp-dom 1.9.0-SNAPSHOT com.google.guava guava 16.0.1 test validate java-design-patterns-1.18.0/naked-objects/dom/src/000077500000000000000000000000001322244523500217105ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/main/000077500000000000000000000000001322244523500226345ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/main/java/000077500000000000000000000000001322244523500235555ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/main/java/META-INF/000077500000000000000000000000001322244523500247155ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/main/java/META-INF/persistence.xml000066400000000000000000000022351322244523500277650ustar00rootroot00000000000000 java-design-patterns-1.18.0/naked-objects/dom/src/main/java/domainapp/000077500000000000000000000000001322244523500255255ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/main/java/domainapp/dom/000077500000000000000000000000001322244523500263045ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/main/java/domainapp/dom/app/000077500000000000000000000000001322244523500270645ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/main/java/domainapp/dom/app/homepage/000077500000000000000000000000001322244523500306515ustar00rootroot00000000000000HomePageService.java000066400000000000000000000031651322244523500344500ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/main/java/domainapp/dom/app/homepage/* * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.dom.app.homepage; import org.apache.isis.applib.DomainObjectContainer; import org.apache.isis.applib.annotation.Action; import org.apache.isis.applib.annotation.DomainService; import org.apache.isis.applib.annotation.HomePage; import org.apache.isis.applib.annotation.NatureOfService; import org.apache.isis.applib.annotation.SemanticsOf; /** * HomePage Domain Service * @see HomePageViewModel linked view to HomePage */ @DomainService(nature = NatureOfService.VIEW_CONTRIBUTIONS_ONLY) public class HomePageService { // endregion // region > injected services @javax.inject.Inject DomainObjectContainer container; // endregion // region > homePage (action) @Action(semantics = SemanticsOf.SAFE) @HomePage public HomePageViewModel homePage() { return container.injectServicesInto(new HomePageViewModel()); } } HomePageViewModel.java000066400000000000000000000030701322244523500347360ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/main/java/domainapp/dom/app/homepage/* * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.dom.app.homepage; import java.util.List; import org.apache.isis.applib.annotation.ViewModel; import domainapp.dom.modules.simple.SimpleObject; import domainapp.dom.modules.simple.SimpleObjects; /** * Model linked to the HomePage * The underlying layout is specified by json * @see HomePageService - Service Linked to the HomePage */ @ViewModel public class HomePageViewModel { // endregion // region > injected services @javax.inject.Inject SimpleObjects simpleObjects; // endregion // region > title public String title() { return getObjects().size() + " objects"; } // endregion // region > object (collection) @org.apache.isis.applib.annotation.HomePage public List getObjects() { return simpleObjects.listAll(); } } HomePageViewModel.layout.json000066400000000000000000000024561322244523500363110ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/main/java/domainapp/dom/app/homepage/** * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ { "columns": [ { "span": 0, "memberGroups": {} }, { "span": 0, "memberGroups": {} }, { "span": 0, "memberGroups": {} }, { "span": 12, "collections": { "objects": { "collectionLayout": { "render": "EAGERLY" } } } } ], "actions": {} }HomePageViewModel.png000066400000000000000000000007101322244523500345770ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/main/java/domainapp/dom/app/homepagePNG  IHDR szzIDATXGQ0D_*JH@BYF($m+c+kʚc6B>L#w >@_Pi\$ n1z)M񷠾q*@J\XC  ĵ5RN|]] ZT5lA]+p @thU{A@mq7wA@ablnz]ʵ\ -`*+(Z]OxM΁7,uAyJ <18l+LI۠Jh;=%-؁ ƁP%tX$uԸżv~Ӿ0Xl%DuCN(jHX*Trٰ;_A(IENDB`java-design-patterns-1.18.0/naked-objects/dom/src/main/java/domainapp/dom/modules/000077500000000000000000000000001322244523500277545ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/main/java/domainapp/dom/modules/simple/000077500000000000000000000000001322244523500312455ustar00rootroot00000000000000SimpleObject.java000066400000000000000000000106051322244523500344130ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/main/java/domainapp/dom/modules/simple/* * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.dom.modules.simple; import javax.jdo.JDOHelper; import javax.jdo.annotations.IdentityType; import javax.jdo.annotations.VersionStrategy; import org.apache.isis.applib.DomainObjectContainer; import org.apache.isis.applib.Identifier; import org.apache.isis.applib.annotation.Action; import org.apache.isis.applib.annotation.BookmarkPolicy; import org.apache.isis.applib.annotation.DomainObject; import org.apache.isis.applib.annotation.DomainObjectLayout; import org.apache.isis.applib.annotation.Editing; import org.apache.isis.applib.annotation.Parameter; import org.apache.isis.applib.annotation.ParameterLayout; import org.apache.isis.applib.annotation.Property; import org.apache.isis.applib.annotation.Title; import org.apache.isis.applib.services.eventbus.ActionDomainEvent; import org.apache.isis.applib.services.i18n.TranslatableString; import org.apache.isis.applib.util.ObjectContracts; /** * Definition of a Simple Object */ @javax.jdo.annotations.PersistenceCapable(identityType = IdentityType.DATASTORE, schema = "simple", table = "SimpleObject") @javax.jdo.annotations.DatastoreIdentity( strategy = javax.jdo.annotations.IdGeneratorStrategy.IDENTITY, column = "id") @javax.jdo.annotations.Version(strategy = VersionStrategy.VERSION_NUMBER, column = "version") @javax.jdo.annotations.Queries({ @javax.jdo.annotations.Query(name = "find", language = "JDOQL", value = "SELECT " + "FROM domainapp.dom.modules.simple.SimpleObject "), @javax.jdo.annotations.Query(name = "findByName", language = "JDOQL", value = "SELECT " + "FROM domainapp.dom.modules.simple.SimpleObject " + "WHERE name.indexOf(:name) >= 0 ")}) @javax.jdo.annotations.Unique(name = "SimpleObject_name_UNQ", members = {"name"}) @DomainObject @DomainObjectLayout(bookmarking = BookmarkPolicy.AS_ROOT, cssClassFa = "fa-flag") public class SimpleObject implements Comparable { // endregion // region > name (property) private String name; // region > identificatiom public TranslatableString title() { return TranslatableString.tr("Object: {name}", "name", getName()); } @javax.jdo.annotations.Column(allowsNull = "false", length = 40) @Title(sequence = "1") @Property(editing = Editing.DISABLED) public String getName() { return name; } public void setName(final String name) { this.name = name; } // endregion // region > updateName (action) /** * Event used to update the Name in the Domain */ public static class UpdateNameDomainEvent extends ActionDomainEvent { public UpdateNameDomainEvent(final SimpleObject source, final Identifier identifier, final Object... arguments) { super(source, identifier, arguments); } } @Action(domainEvent = UpdateNameDomainEvent.class) public SimpleObject updateName( @Parameter(maxLength = 40) @ParameterLayout(named = "New name") final String name) { setName(name); return this; } public String default0UpdateName() { return getName(); } public TranslatableString validateUpdateName(final String name) { return name.contains("!") ? TranslatableString.tr("Exclamation mark is not allowed") : null; } // endregion // region > version (derived property) public Long getVersionSequence() { return (Long) JDOHelper.getVersion(this); } // endregion // region > compareTo @Override public int compareTo(final SimpleObject other) { return ObjectContracts.compare(this, other, "name"); } // endregion // region > injected services @javax.inject.Inject @SuppressWarnings("unused") private DomainObjectContainer container; // endregion } SimpleObject.layout.json000066400000000000000000000034561322244523500357650ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/main/java/domainapp/dom/modules/simple/** * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ { "columns": [ { "span": 6, "memberGroups": { "General": { "members": { "name": { "actions": { "updateName": { "actionLayout": { "position": "BOTTOM" } } } }, "versionSequence": { "propertyLayout": { "name": "version" } } } } } }, { "span": 0, "memberGroups": {} }, { "span": 0, "memberGroups": {} }, { "span": 6, "collections": {} } ], "actions": {} }SimpleObject.png000066400000000000000000000012151322244523500342530ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/main/java/domainapp/dom/modules/simplePNG  IHDR szzTIDATXGŗ1A"@\ D"@ D[ٙٝR~g?37H-]g uS C53$-JGo!,OE4!?QGZ/)𫈄Th%FxJ C ̋HH>D+"ܻ H-z¥zH> rFcћW![>C^L7LDJ|{.s 9"!ɹ1_Ŕ$BR͔))hi RHdN %Ae۴A:wm\B""bR1,")Js!!u;)RC@Gu$,x}LS*LlvT(fkϖ&cǗ>ȍ0;|b)@0uRDWf{, .<64Nu?#8 逾"]G)Nytm)#b&`c!@ڮ *Ba>y߈ "ǃr)9&GExD-LC2c7_5Sw-3|IwpX6~QlbYIENDB`SimpleObjects.java000066400000000000000000000064311322244523500346000ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/main/java/domainapp/dom/modules/simple/* * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.dom.modules.simple; import java.util.List; import org.apache.isis.applib.DomainObjectContainer; import org.apache.isis.applib.Identifier; import org.apache.isis.applib.annotation.Action; import org.apache.isis.applib.annotation.ActionLayout; import org.apache.isis.applib.annotation.BookmarkPolicy; import org.apache.isis.applib.annotation.DomainService; import org.apache.isis.applib.annotation.DomainServiceLayout; import org.apache.isis.applib.annotation.MemberOrder; import org.apache.isis.applib.annotation.ParameterLayout; import org.apache.isis.applib.annotation.SemanticsOf; import org.apache.isis.applib.query.QueryDefault; import org.apache.isis.applib.services.eventbus.ActionDomainEvent; import org.apache.isis.applib.services.i18n.TranslatableString; /** * Domain Service for Simple Objects */ @DomainService(repositoryFor = SimpleObject.class) @DomainServiceLayout(menuOrder = "10") public class SimpleObjects { // endregion // region > injected services @javax.inject.Inject DomainObjectContainer container; // endregion // region > title public TranslatableString title() { return TranslatableString.tr("Simple Objects"); } // endregion // region > listAll (action) @Action(semantics = SemanticsOf.SAFE) @ActionLayout(bookmarking = BookmarkPolicy.AS_ROOT) @MemberOrder(sequence = "1") public List listAll() { return container.allInstances(SimpleObject.class); } // endregion // region > findByName (action) @Action(semantics = SemanticsOf.SAFE) @ActionLayout(bookmarking = BookmarkPolicy.AS_ROOT) @MemberOrder(sequence = "2") public List findByName(@ParameterLayout(named = "Name") final String name) { return container.allMatches(new QueryDefault<>(SimpleObject.class, "findByName", "name", name)); } // endregion /** * Create Domain Event on SimpleObjects */ // region > create (action) public static class CreateDomainEvent extends ActionDomainEvent { public CreateDomainEvent(final SimpleObjects source, final Identifier identifier, final Object... arguments) { super(source, identifier, arguments); } } /** * Create simple object */ @Action(domainEvent = CreateDomainEvent.class) @MemberOrder(sequence = "3") public SimpleObject create(@ParameterLayout(named = "Name") final String name) { final SimpleObject obj = container.newTransientInstance(SimpleObject.class); obj.setName(name); container.persistIfNotAlready(obj); return obj; } } java-design-patterns-1.18.0/naked-objects/dom/src/test/000077500000000000000000000000001322244523500226675ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/test/java/000077500000000000000000000000001322244523500236105ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/test/java/domainapp/000077500000000000000000000000001322244523500255605ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/test/java/domainapp/dom/000077500000000000000000000000001322244523500263375ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/test/java/domainapp/dom/modules/000077500000000000000000000000001322244523500300075ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/test/java/domainapp/dom/modules/simple/000077500000000000000000000000001322244523500313005ustar00rootroot00000000000000SimpleObjectTest.java000066400000000000000000000027621322244523500353130ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/test/java/domainapp/dom/modules/simple/** * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.dom.modules.simple; import static org.assertj.core.api.Assertions.assertThat; import org.junit.Before; import org.junit.Test; /** * Test for SimpleObject */ public class SimpleObjectTest { SimpleObject simpleObject; @Before public void setUp() throws Exception { simpleObject = new SimpleObject(); } /** * Test for Names for SimpleObjects */ public static class Name extends SimpleObjectTest { @Test public void happyCase() throws Exception { // given String name = "Foobar"; assertThat(simpleObject.getName()).isNull(); // when simpleObject.setName(name); // then assertThat(simpleObject.getName()).isEqualTo(name); } } } SimpleObjectsTest.java000066400000000000000000000060031322244523500354660ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/dom/src/test/java/domainapp/dom/modules/simple/** * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.dom.modules.simple; import static org.assertj.core.api.Assertions.assertThat; import com.google.common.collect.Lists; import java.util.List; import org.apache.isis.applib.DomainObjectContainer; import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2; import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2.Mode; import org.jmock.Expectations; import org.jmock.Sequence; import org.jmock.auto.Mock; import org.junit.Before; import org.junit.Rule; import org.junit.Test; /** * Test for SimpleObjects */ public class SimpleObjectsTest { @Rule public JUnitRuleMockery2 context = JUnitRuleMockery2.createFor(Mode.INTERFACES_AND_CLASSES); @Mock DomainObjectContainer mockContainer; SimpleObjects simpleObjects; @Before public void setUp() throws Exception { simpleObjects = new SimpleObjects(); simpleObjects.container = mockContainer; } /** * Test Creation of Simple Objects */ public static class Create extends SimpleObjectsTest { @Test public void happyCase() throws Exception { // given final SimpleObject simpleObject = new SimpleObject(); final Sequence seq = context.sequence("create"); context.checking(new Expectations() { { oneOf(mockContainer).newTransientInstance(SimpleObject.class); inSequence(seq); will(returnValue(simpleObject)); oneOf(mockContainer).persistIfNotAlready(simpleObject); inSequence(seq); } }); // when final SimpleObject obj = simpleObjects.create("Foobar"); // then assertThat(obj).isEqualTo(simpleObject); assertThat(obj.getName()).isEqualTo("Foobar"); } } /** * Test Listing of Simple Objects */ public static class ListAll extends SimpleObjectsTest { @Test public void happyCase() throws Exception { // given final List all = Lists.newArrayList(); context.checking(new Expectations() { { oneOf(mockContainer).allInstances(SimpleObject.class); will(returnValue(all)); } }); // when final List list = simpleObjects.listAll(); // then assertThat(list).isEqualTo(all); } } } java-design-patterns-1.18.0/naked-objects/etc/000077500000000000000000000000001322244523500211155ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/etc/naked-objects.png000066400000000000000000002224161322244523500243430ustar00rootroot00000000000000PNG  IHDRV$IDATxm-Gy4Q>"Hü &\ g8bresIb6F-2 8 lea|6>Nll@>+q8c0/K',>9D14o]/OUW^ݫ_[kuWUWwuۗ_z]o&>O/UUl'V{y>Nrv $/{g[3{GOܚ=:Lͧ O-~-cJ9@l@I{~#{}{L~#(Fu\X.i`,d6MZۮ~J偙O y(} 䨺S-\=3G|#D 3!8a"؀k:K/E_GnHKQ/Qָ%Px XK ٽ|aogWe&ǺU_׶ طS*Is"NS_K{>^|m[3arpw.>}E'ߩ_eL-iͬVD_R[zknBg .țҵDX`GUZ)"SNH 6 $/_[ޕ<?_rUueG^x듿qb9 > ETy6Un飀UVO@1E򣀎B% H_:37k'Mou?5q=cZÞpᅿdy[GRƮ % [p11`\ `["pZW8}h PA H$aD&qZg&X B)HZ~@8.ǪTyMػMHHM$c#H*  BHg߾7?$cy0`Bp" B)J!{Y+>+#qGc  $aD*:vH;˴,=ב{=VV%T%` DP] 8z bu̍H;֑TJS\iSb#uM N T2).?VBp؆HC) @@T@*`#6#V<[HUX=_79iHqBrZvyD1_BV`XeÈ0qT k\,PjMɱժﭞq~"=CIߗAhAQ9rb DhIvH*.z̤-Նh+JZtI>nOL1`59^KX :BwHM8ݩ%ʕ :Qc tɑ#|Oq[#@0q!1 $3^Ǖ<VW׎nyു]UBb`bDBڢjyBiQs!@Gbu46G$ͤWTU:3Mu1RkMҔPMF5K@$fDP0wxa c `] %+R+{\(#)>2gB$͈1O `gwNLtcej99 3=u`yቑ+j[9y Dh o& $ٳG/tp{jNU/q/k  V܈0[NvbV+ms\;" wNC 5T ̟mJf:K#"[ @q/وˠY `58H@8"vCPqp M򕨚d.&VlWu/~E:p BHF$m' n.isc{R[%6 H=I @>'euO*3pD& @$HHM$c#H*  BHF$T @#%6 H0"@FJ$m"T|sM|69NBF @$BY\pk0w$mݶܱ;4 $|RM~>v?̙_t$\?*m|=+O77qo#-MLQ= rZ?*g{ /a~g0nҤ?~ph c)lHGYe~۾3n|^edxlzPzJ'l]wD1 @0RF%7i&# `Dxso̕8{y?zE.WgR'GgV> _p(h(؊.qk"@Fx$M-KJ*EMbDxC7^\=>=O}~|xw&~[Kv2z?V_YiRLBjapOB)?զ/őZ3boryL#$5A+%5{RYN! !]i?)cs1a M.CQGʒ?zK;:)cDpgϝ7oHd?ǧ*ar!;I0V=l W1Ȫ>6Dk:K/E{ǿ;9?7~sA.ME{-ڪʛ,\^e&7ˉaoWx=eo3=ݵm.%P2*J]5f۶JmB%mECI+nƐz5zϧ 1ʃׯBan3h N&XIjz8m!q46B~O%o~7[o7&|ǛW\tz}%2uРQg!c>:zʅ˫v/9VWkfe̱ŞvbrV i=&I% `B7;pg8v2iDcܮ&Mۄ0Sz~ƴrb_/F /_[ޕdϗ}w]>Y}] /~hU%kL?d%3f*utdfRpQ쐶R(vFIJUBgeۼ5>Zg Vk/f>bwO\fxV8/Q$uNgFLS$U"D? 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See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.fixture; import org.apache.isis.applib.annotation.DomainService; import org.apache.isis.applib.annotation.NatureOfService; import org.apache.isis.applib.fixturescripts.FixtureScripts; import org.apache.isis.applib.services.fixturespec.FixtureScriptsSpecification; import org.apache.isis.applib.services.fixturespec.FixtureScriptsSpecificationProvider; import domainapp.fixture.scenarios.RecreateSimpleObjects; /** * Specifies where to find fixtures, and other settings. */ @DomainService(nature = NatureOfService.DOMAIN) public class DomainAppFixturesProvider implements FixtureScriptsSpecificationProvider { @Override public FixtureScriptsSpecification getSpecification() { return FixtureScriptsSpecification.builder(DomainAppFixturesProvider.class) .with(FixtureScripts.MultipleExecutionStrategy.EXECUTE) .withRunScriptDefault(RecreateSimpleObjects.class) .withRunScriptDropDown(FixtureScriptsSpecification.DropDownPolicy.CHOICES) .withRecreate(RecreateSimpleObjects.class).build(); } } java-design-patterns-1.18.0/naked-objects/fixture/src/main/java/domainapp/fixture/modules/000077500000000000000000000000001322244523500315725ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/fixture/src/main/java/domainapp/fixture/modules/simple/000077500000000000000000000000001322244523500330635ustar00rootroot00000000000000SimpleObjectCreate.java000066400000000000000000000035721322244523500373620ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/fixture/src/main/java/domainapp/fixture/modules/simple/* * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.fixture.modules.simple; import org.apache.isis.applib.fixturescripts.FixtureScript; import domainapp.dom.modules.simple.SimpleObject; import domainapp.dom.modules.simple.SimpleObjects; /** * Fixture to create a simple object */ public class SimpleObjectCreate extends FixtureScript { // endregion // region > simpleObject (output) private SimpleObject simpleObject; @javax.inject.Inject private SimpleObjects simpleObjects; // region > name (input) private String name; /** * Name of the object (required) */ public String getName() { return name; } public SimpleObjectCreate setName(final String name) { this.name = name; return this; } /** * The created simple object (output). */ public SimpleObject getSimpleObject() { return simpleObject; } // endregion @Override protected void execute(final ExecutionContext ec) { String paramName = checkParam("name", ec, String.class); this.simpleObject = wrap(simpleObjects).create(paramName); // also make available to UI ec.addResult(this, simpleObject); } } SimpleObjectsTearDown.java000066400000000000000000000024121322244523500400550ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/fixture/src/main/java/domainapp/fixture/modules/simple/* * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.fixture.modules.simple; import org.apache.isis.applib.fixturescripts.FixtureScript; import org.apache.isis.applib.services.jdosupport.IsisJdoSupport; /** * TearDown/Cleanup for SimpleObjects */ public class SimpleObjectsTearDown extends FixtureScript { @javax.inject.Inject private IsisJdoSupport isisJdoSupport; @Override protected void execute(ExecutionContext executionContext) { isisJdoSupport.executeUpdate("delete from \"simple\".\"SimpleObject\""); } } java-design-patterns-1.18.0/naked-objects/fixture/src/main/java/domainapp/fixture/scenarios/000077500000000000000000000000001322244523500321105ustar00rootroot00000000000000RecreateSimpleObjects.java000066400000000000000000000054001322244523500371110ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/fixture/src/main/java/domainapp/fixture/scenarios/* * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.fixture.scenarios; import java.util.Arrays; import java.util.Collections; import java.util.List; import com.google.common.collect.Lists; import org.apache.isis.applib.fixturescripts.FixtureScript; import domainapp.dom.modules.simple.SimpleObject; import domainapp.fixture.modules.simple.SimpleObjectCreate; import domainapp.fixture.modules.simple.SimpleObjectsTearDown; /** * Create a bunch of simple Objects */ public class RecreateSimpleObjects extends FixtureScript { public final List names = Collections.unmodifiableList(Arrays.asList("Foo", "Bar", "Baz", "Frodo", "Froyo", "Fizz", "Bip", "Bop", "Bang", "Boo")); // region > number (optional input) private Integer number; // endregion // region > simpleObjects (output) private final List simpleObjects = Lists.newArrayList(); public RecreateSimpleObjects() { withDiscoverability(Discoverability.DISCOVERABLE); } /** * The number of objects to create, up to 10; optional, defaults to 3. */ public Integer getNumber() { return number; } public RecreateSimpleObjects setNumber(final Integer number) { this.number = number; return this; } /** * The simpleobjects created by this fixture (output). */ public List getSimpleObjects() { return simpleObjects; } // endregion @Override protected void execute(final ExecutionContext ec) { // defaults final int paramNumber = defaultParam("number", ec, 3); // validate if (paramNumber < 0 || paramNumber > names.size()) { throw new IllegalArgumentException(String.format("number must be in range [0,%d)", names.size())); } // // execute // ec.executeChild(this, new SimpleObjectsTearDown()); for (int i = 0; i < paramNumber; i++) { final SimpleObjectCreate fs = new SimpleObjectCreate().setName(names.get(i)); ec.executeChild(this, fs.getName(), fs); simpleObjects.add(fs.getSimpleObject()); } } } java-design-patterns-1.18.0/naked-objects/integtests/000077500000000000000000000000001322244523500225335ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/.gitignore000066400000000000000000000000221322244523500245150ustar00rootroot00000000000000/translations.pot java-design-patterns-1.18.0/naked-objects/integtests/pom.xml000066400000000000000000000075221322244523500240560ustar00rootroot00000000000000 4.0.0 com.iluwatar naked-objects 1.18.0 naked-objects-integtests src/test/resources src/test/java ** **/*.java ${project.groupId} naked-objects-fixture org.apache.isis.core isis-core-unittestsupport org.apache.isis.core isis-core-integtestsupport org.apache.isis.core isis-core-specsupport org.hamcrest hamcrest-library org.apache.isis.core isis-core-wrapper org.apache.isis.core isis-core-runtime org.assertj assertj-core test org.junit.vintage junit-vintage-engine test org.hsqldb hsqldb java-design-patterns-1.18.0/naked-objects/integtests/src/000077500000000000000000000000001322244523500233225ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/000077500000000000000000000000001322244523500243015ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/000077500000000000000000000000001322244523500252225ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/000077500000000000000000000000001322244523500271725ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/000077500000000000000000000000001322244523500313635ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/bootstrap/000077500000000000000000000000001322244523500334005ustar00rootroot00000000000000SimpleAppSystemInitializer.java000066400000000000000000000042261322244523500414730ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/bootstrap/* * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.integtests.bootstrap; import org.apache.isis.core.commons.config.IsisConfiguration; import org.apache.isis.core.integtestsupport.IsisSystemForTest; import org.apache.isis.objectstore.jdo.datanucleus.DataNucleusPersistenceMechanismInstaller; import org.apache.isis.objectstore.jdo.datanucleus.IsisConfigurationForJdoIntegTests; /** * Initializer for the Simple App */ public final class SimpleAppSystemInitializer { private SimpleAppSystemInitializer() { } /** * Init test system */ public static void initIsft() { IsisSystemForTest isft = IsisSystemForTest.getElseNull(); if (isft == null) { isft = new SimpleAppSystemBuilder().build().setUpSystem(); IsisSystemForTest.set(isft); } } private static class SimpleAppSystemBuilder extends IsisSystemForTest.Builder { public SimpleAppSystemBuilder() { withLoggingAt(org.apache.log4j.Level.INFO); with(testConfiguration()); with(new DataNucleusPersistenceMechanismInstaller()); // services annotated with @DomainService withServicesIn("domainapp"); } private static IsisConfiguration testConfiguration() { final IsisConfigurationForJdoIntegTests testConfiguration = new IsisConfigurationForJdoIntegTests(); testConfiguration.addRegisterEntitiesPackagePrefix("domainapp.dom.modules"); return testConfiguration; } } } java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/specglue/000077500000000000000000000000001322244523500331725ustar00rootroot00000000000000BootstrappingGlue.java000066400000000000000000000031201322244523500374220ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/specglue/** * O * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.integtests.specglue; import org.apache.isis.core.specsupport.scenarios.ScenarioExecutionScope; import org.apache.isis.core.specsupport.specs.CukeGlueAbstract; import cucumber.api.java.After; import cucumber.api.java.Before; import domainapp.integtests.bootstrap.SimpleAppSystemInitializer; /** * BootStrapping IntegrationTesting Before and After Steps */ public class BootstrappingGlue extends CukeGlueAbstract { @Before(value = {"@integration"}, order = 100) public void beforeScenarioIntegrationScope() { org.apache.log4j.PropertyConfigurator.configure("logging.properties"); SimpleAppSystemInitializer.initIsft(); before(ScenarioExecutionScope.INTEGRATION); } @After public void afterScenario(cucumber.api.Scenario sc) { assertMocksSatisfied(); after(sc); } } CatalogOfFixturesGlue.java000066400000000000000000000024411322244523500401650ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/specglue/** * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.integtests.specglue; import org.apache.isis.core.specsupport.specs.CukeGlueAbstract; import cucumber.api.java.Before; import domainapp.fixture.scenarios.RecreateSimpleObjects; /** * Test Execution to append a fixture of SimpleObjects */ public class CatalogOfFixturesGlue extends CukeGlueAbstract { @Before(value = {"@integration", "@SimpleObjectsFixture"}, order = 20000) public void integrationFixtures() throws Throwable { scenarioExecution().install(new RecreateSimpleObjects()); } } modules/000077500000000000000000000000001322244523500345635ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/specgluesimple/000077500000000000000000000000001322244523500360545ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/specglue/modulesSimpleObjectGlue.java000066400000000000000000000034501322244523500421160ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/specglue/modules/simple/** * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.integtests.specglue.modules.simple; import static org.hamcrest.CoreMatchers.is; import static org.junit.Assert.assertThat; import cucumber.api.java.en.Given; import cucumber.api.java.en.When; import domainapp.dom.modules.simple.SimpleObject; import domainapp.dom.modules.simple.SimpleObjects; import java.util.List; import java.util.UUID; import org.apache.isis.core.specsupport.specs.CukeGlueAbstract; /** * Test Simple Object Operations */ public class SimpleObjectGlue extends CukeGlueAbstract { @Given("^there are.* (\\d+) simple objects$") public void thereAreNumSimpleObjects(int n) throws Throwable { try { final List findAll = service(SimpleObjects.class).listAll(); assertThat(findAll.size(), is(n)); putVar("list", "all", findAll); } finally { assertMocksSatisfied(); } } @When("^I create a new simple object$") public void createNewSimpleObject() throws Throwable { service(SimpleObjects.class).create(UUID.randomUUID().toString()); } } java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/specs/000077500000000000000000000000001322244523500325005ustar00rootroot00000000000000RunSpecs.java000066400000000000000000000024401322244523500350260ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/specs/** * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.integtests.specs; import org.junit.runner.RunWith; import cucumber.api.CucumberOptions; import cucumber.api.junit.Cucumber; /** * Runs scenarios in all .feature files (this package and any subpackages). */ @RunWith(Cucumber.class) @CucumberOptions(format = {"html:target/cucumber-html-report", "json:target/cucumber.json"}, glue = {"classpath:domainapp.integtests.specglue"}, strict = true, tags = {"~@backlog", "~@ignore"}) public class RunSpecs { // intentionally empty } modules/000077500000000000000000000000001322244523500340715ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/specssimple/000077500000000000000000000000001322244523500353625ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/specs/modulesSimpleObjectSpec_listAllAndCreate.feature000066400000000000000000000020661322244523500453710ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/specs/modules/simple# # Licensed to the Apache Software Foundation (ASF) under one or more # contributor license agreements. See the NOTICE file distributed with # this work for additional information regarding copyright ownership. # The ASF licenses this file to You under the Apache License, Version 2.0 # (the "License"); you may not use this file except in compliance with # the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. # @SimpleObjectsFixture Feature: List and Create New Simple Objects @integration Scenario: Existing simple objects can be listed and new ones created Given there are initially 3 simple objects When I create a new simple object Then there are 4 simple objects java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/tests/000077500000000000000000000000001322244523500325255ustar00rootroot00000000000000SimpleAppIntegTest.java000066400000000000000000000030041322244523500370270ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/tests/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package domainapp.integtests.tests; import org.junit.BeforeClass; import org.apache.isis.core.integtestsupport.IntegrationTestAbstract; import org.apache.isis.core.integtestsupport.scenarios.ScenarioExecutionForIntegration; import domainapp.integtests.bootstrap.SimpleAppSystemInitializer; /** * SimpleApp Integration Tests will implement this Abstract Class. */ public abstract class SimpleAppIntegTest extends IntegrationTestAbstract { @BeforeClass public static void initClass() { org.apache.log4j.PropertyConfigurator.configure("logging.properties"); SimpleAppSystemInitializer.initIsft(); // instantiating will install onto ThreadLocal new ScenarioExecutionForIntegration(); } } modules/000077500000000000000000000000001322244523500341165ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/testssimple/000077500000000000000000000000001322244523500354075ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/tests/modulesSimpleObjectIntegTest.java000066400000000000000000000070561322244523500424710ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/tests/modules/simple/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package domainapp.integtests.tests.modules.simple; import static org.assertj.core.api.Assertions.assertThat; import domainapp.dom.modules.simple.SimpleObject; import domainapp.fixture.scenarios.RecreateSimpleObjects; import domainapp.integtests.tests.SimpleAppIntegTest; import javax.inject.Inject; import org.apache.isis.applib.DomainObjectContainer; import org.apache.isis.applib.fixturescripts.FixtureScripts; import org.apache.isis.applib.services.wrapper.DisabledException; import org.apache.isis.applib.services.wrapper.InvalidException; import org.junit.Before; import org.junit.Test; /** * Test Fixtures with Simple Objects */ public class SimpleObjectIntegTest extends SimpleAppIntegTest { @Inject FixtureScripts fixtureScripts; RecreateSimpleObjects fs; SimpleObject simpleObjectPojo; SimpleObject simpleObjectWrapped; @Before public void setUp() throws Exception { // given fs = new RecreateSimpleObjects().setNumber(1); fixtureScripts.runFixtureScript(fs, null); simpleObjectPojo = fs.getSimpleObjects().get(0); assertThat(simpleObjectPojo).isNotNull(); simpleObjectWrapped = wrap(simpleObjectPojo); } /** * Test Object Name accessibility */ public static class Name extends SimpleObjectIntegTest { @Test public void accessible() throws Exception { // when final String name = simpleObjectWrapped.getName(); // then assertThat(name).isEqualTo(fs.names.get(0)); } @Test public void cannotBeUpdatedDirectly() throws Exception { // expect expectedExceptions.expect(DisabledException.class); // when simpleObjectWrapped.setName("new name"); } } /** * Test Validation of SimpleObject Names */ public static class UpdateName extends SimpleObjectIntegTest { @Test public void happyCase() throws Exception { // when simpleObjectWrapped.updateName("new name"); // then assertThat(simpleObjectWrapped.getName()).isEqualTo("new name"); } @Test public void failsValidation() throws Exception { // expect expectedExceptions.expect(InvalidException.class); expectedExceptions.expectMessage("Exclamation mark is not allowed"); // when simpleObjectWrapped.updateName("new name!"); } } /** * Test ContainerTitle generation based on SimpleObject Name */ public static class Title extends SimpleObjectIntegTest { @Inject DomainObjectContainer container; @Test public void interpolatesName() throws Exception { // given final String name = simpleObjectWrapped.getName(); // when final String title = container.titleOf(simpleObjectWrapped); // then assertThat(title).isEqualTo("Object: " + name); } } } SimpleObjectsIntegTest.java000066400000000000000000000105571322244523500426540ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/integtests/src/test/java/domainapp/integtests/tests/modules/simple/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package domainapp.integtests.tests.modules.simple; import static org.assertj.core.api.Assertions.assertThat; import com.google.common.base.Throwables; import domainapp.dom.modules.simple.SimpleObject; import domainapp.dom.modules.simple.SimpleObjects; import domainapp.fixture.modules.simple.SimpleObjectsTearDown; import domainapp.fixture.scenarios.RecreateSimpleObjects; import domainapp.integtests.tests.SimpleAppIntegTest; import java.sql.SQLIntegrityConstraintViolationException; import java.util.List; import javax.inject.Inject; import org.apache.isis.applib.fixturescripts.FixtureScript; import org.apache.isis.applib.fixturescripts.FixtureScripts; import org.hamcrest.Description; import org.hamcrest.Matcher; import org.hamcrest.TypeSafeMatcher; import org.junit.Test; /** * Fixture Pattern Integration Test */ public class SimpleObjectsIntegTest extends SimpleAppIntegTest { @Inject FixtureScripts fixtureScripts; @Inject SimpleObjects simpleObjects; /** * Test Listing of All Simple Objects */ public static class ListAll extends SimpleObjectsIntegTest { @Test public void happyCase() throws Exception { // given RecreateSimpleObjects fs = new RecreateSimpleObjects(); fixtureScripts.runFixtureScript(fs, null); nextTransaction(); // when final List all = wrap(simpleObjects).listAll(); // then assertThat(all).hasSize(fs.getSimpleObjects().size()); SimpleObject simpleObject = wrap(all.get(0)); assertThat(simpleObject.getName()).isEqualTo(fs.getSimpleObjects().get(0).getName()); } @Test public void whenNone() throws Exception { // given FixtureScript fs = new SimpleObjectsTearDown(); fixtureScripts.runFixtureScript(fs, null); nextTransaction(); // when final List all = wrap(simpleObjects).listAll(); // then assertThat(all).hasSize(0); } } /** * Test Creation of Simple Objects */ public static class Create extends SimpleObjectsIntegTest { @Test public void happyCase() throws Exception { // given FixtureScript fs = new SimpleObjectsTearDown(); fixtureScripts.runFixtureScript(fs, null); nextTransaction(); // when wrap(simpleObjects).create("Faz"); // then final List all = wrap(simpleObjects).listAll(); assertThat(all).hasSize(1); } @Test public void whenAlreadyExists() throws Exception { // given FixtureScript fs = new SimpleObjectsTearDown(); fixtureScripts.runFixtureScript(fs, null); nextTransaction(); wrap(simpleObjects).create("Faz"); nextTransaction(); // then expectedExceptions.expectCause(causalChainContains(SQLIntegrityConstraintViolationException.class)); // when wrap(simpleObjects).create("Faz"); nextTransaction(); } private static Matcher causalChainContains(final Class cls) { return new TypeSafeMatcher() { @Override protected boolean matchesSafely(Throwable item) { final List causalChain = Throwables.getCausalChain(item); for (Throwable throwable : causalChain) { if (cls.isAssignableFrom(throwable.getClass())) { return true; } } return false; } @Override public void describeTo(Description description) { description.appendText("exception with causal chain containing " + cls.getSimpleName()); } }; } } } java-design-patterns-1.18.0/naked-objects/pom.xml000066400000000000000000000321331322244523500216610ustar00rootroot00000000000000 4.0.0 java-design-patterns com.iluwatar 1.18.0 naked-objects pom 3.0.4 1.9.0 UTF-8 UTF-8 2.0.0 apache.snapshots Apache Snapshots https://repository.apache.org/content/repositories/snapshots/ false Cloudbees snapshots http://repository-estatio.forge.cloudbees.com/snapshot/ false org.apache.maven.plugins maven-enforcer-plugin 1.3.1 [3.2.1,) [1.8.0,) All plugin versions must be defined! true true validate-enforce validate enforce org.apache.maven.plugins maven-compiler-plugin 3.1 1.8 1.8 -parameters source compile test test-compile org.apache.maven.plugins maven-surefire-plugin 2.16 **/*Test.java **/*Test$*.java **/*Test_*.java **/*Spec*.java **/Test*.java **/*ForTesting.java **/*Abstract*.java true true ${project.build.directory}/surefire-reports org.apache.maven.plugins maven-surefire-report-plugin 2.16 false test maven-clean-plugin 2.5 maven-resources-plugin 2.6 maven-jar-plugin 2.4 maven-install-plugin 2.5.1 maven-deploy-plugin 2.8.1 maven-site-plugin 3.3 maven-war-plugin 2.4 org.mortbay.jetty maven-jetty-plugin 6.1.26 org.apache.maven.plugins maven-shade-plugin 2.2 org.apache.maven.plugins maven-antrun-plugin 1.7 run org.simplericity.jettyconsole jetty-console-maven-plugin 1.56 org.apache.rat apache-rat-plugin 0.10 true true **/target/** **/target-ide/** **/*.project **/.classpath **/.settings/** **/*.launch **/ide/eclipse/launch/** **/ide/intellij/launch/** src/site/resources/ide/eclipse/** **/rebel.xml **/*.gitignore **/*.log **/*.pdn **/*.svg **/*.json **/*.min.js **/*.js **/translations.pot **/translations*.po AL2 Apache License 2.0 Licensed to the Apache Software Foundation (ASF) under one JQRY MIT Dual licensed under the MIT or GPL Version 2 licenses. JMOCK JMock Copyright (c) 2000-2007, jMock.org DOCBK DocBook 4.5 Permission to copy in any form is granted for use Permission to use, copy, modify and distribute the DocBook DTD is hereby granted in perpetuity, provided that the above copyright This is the catalog data file for DocBook XML V4.5. It is provided as XML Catalog data for DocBook XML V4.5 DocBook additional general entities V4.5 XML EXCHANGE TABLE MODEL DECLARATION MODULE W3C XHTML Copyright (c) 1998-2002 W3C (MIT, INRIA, Keio), Apache License 2.0 MIT JMock DocBook 4.5 XHTML org.apache.maven.plugins maven-compiler-plugin org.apache.maven.plugins maven-surefire-report-plugin org.apache.isis.core isis ${isis.version} pom import org.apache.isis.viewer isis-viewer-wicket ${isis.version} pom import org.assertj assertj-core ${assertj-core.version} ${project.groupId} naked-objects-dom 1.18.0 ${project.groupId} naked-objects-fixture 1.18.0 ${project.groupId} naked-objects-webapp 1.18.0 m2e m2e.version target-ide dom fixture integtests webapp java-design-patterns-1.18.0/naked-objects/webapp/000077500000000000000000000000001322244523500216205ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/ide/000077500000000000000000000000001322244523500223615ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/ide/eclipse/000077500000000000000000000000001322244523500240055ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/ide/eclipse/launch/000077500000000000000000000000001322244523500252575ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/ide/eclipse/launch/.gitignore000066400000000000000000000004641322244523500272530ustar00rootroot00000000000000/SimpleApp-PROTOTYPE-jrebel.launch /SimpleApp-PROTOTYPE-no-fixtures.launch /SimpleApp-PROTOTYPE-with-fixtures.launch /SimpleApp-SERVER-no-fixtures.launch /SimpleApp-PROTOTYPE-jrebel.launch /SimpleApp-PROTOTYPE-no-fixtures.launch /SimpleApp-PROTOTYPE-with-fixtures.launch /SimpleApp-SERVER-no-fixtures.launch java-design-patterns-1.18.0/naked-objects/webapp/ide/intellij/000077500000000000000000000000001322244523500241735ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/ide/intellij/launch/000077500000000000000000000000001322244523500254455ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/ide/intellij/launch/README.txt000066400000000000000000000023461322244523500271500ustar00rootroot00000000000000==== The MIT License Copyright (c) 2014-2016 Ilkka Seppälä Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ==== Copy into workspace\.idea\runConfigurations directory, and adjust file paths for Maven tasks. java-design-patterns-1.18.0/naked-objects/webapp/ide/intellij/launch/SimpleApp_PROTOTYPE.xml000066400000000000000000000050521322244523500315500ustar00rootroot00000000000000 java-design-patterns-1.18.0/naked-objects/webapp/ide/intellij/launch/SimpleApp__enhance_only_.xml000066400000000000000000000044131322244523500331030ustar00rootroot00000000000000 s java-design-patterns-1.18.0/naked-objects/webapp/lib/000077500000000000000000000000001322244523500223665ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/lib/.gitignore000066400000000000000000000001361322244523500243560ustar00rootroot00000000000000# # explicitly ignoring Microsoft JDBC4 jar # (cannot redistribute, licensing) # sqljdbc4.jar java-design-patterns-1.18.0/naked-objects/webapp/pom.xml000066400000000000000000000252301322244523500231370ustar00rootroot00000000000000 4.0.0 com.iluwatar naked-objects 1.18.0 naked-objects-webapp This module runs both the Wicket viewer and the Restfulobjects viewer in a single webapp configured to run using the datanucleus object store. war .. org.mortbay.jetty maven-jetty-plugin org.simplericity.jettyconsole jetty-console-maven-plugin createconsole ${basedir}/src/main/jettyconsole/isis-banner.png ${project.build.directory}/${project.build.finalName}-jetty-console.jar package org.codehaus.mojo build-helper-maven-plugin 1.8 validate maven-version maven-war-plugin simpleapp false ${maven.build.timestamp} ${agent.name} ${user.name} Maven ${maven.version} ${java.version} ${os.name} ${project.version} WEB-INF/lib/isis-core-webserver*.jar, WEB-INF/lib/javax.servlet-api-*.jar, WEB-INF/lib/javax.websocket-api-*.jar, WEB-INF/lib/jetty-all-*.jar org.eclipse.m2e lifecycle-mapping 1.0.0 org.codehaus.mojo build-helper-maven-plugin [1.5,) maven-version ${project.groupId} naked-objects-dom org.datanucleus datanucleus-enhancer ${project.groupId} naked-objects-fixture org.datanucleus datanucleus-enhancer org.apache.isis.viewer isis-viewer-wicket-impl org.apache.isis.core isis-core-viewer-restfulobjects-server org.apache.isis.core isis-core-security-shiro org.apache.isis.core isis-core-runtime org.apache.isis.core isis-core-wrapper org.apache.isis.core isis-core-security org.apache.isis.core isis-core-webserver runtime true org.apache.geronimo.specs geronimo-servlet_3.0_spec org.hsqldb hsqldb org.lazyluke log4jdbc-remix org.slf4j slf4j-api junit junit test org.junit.vintage junit-vintage-engine test self-host org.apache.maven.plugins maven-antrun-plugin intellij idea.version org.apache.geronimo.specs geronimo-servlet_3.0_spec compile jrebel target dom.simple,org.apache.isis.objectstore.jdo.applib warn org.apache.maven.plugins maven-antrun-plugin java-design-patterns-1.18.0/naked-objects/webapp/src/000077500000000000000000000000001322244523500224075ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/src/main/000077500000000000000000000000001322244523500233335ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/src/main/java/000077500000000000000000000000001322244523500242545ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/src/main/java/domainapp/000077500000000000000000000000001322244523500262245ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/src/main/java/domainapp/webapp/000077500000000000000000000000001322244523500275025ustar00rootroot00000000000000SimpleApplication.java000066400000000000000000000127341322244523500337120ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/src/main/java/domainapp/webapp/* * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.webapp; import java.io.IOException; import java.io.InputStream; import java.nio.charset.Charset; import java.util.List; import javax.servlet.http.HttpServletRequest; import com.google.common.base.Joiner; import com.google.common.io.Resources; import com.google.inject.AbstractModule; import com.google.inject.Module; import com.google.inject.name.Names; import com.google.inject.util.Modules; import com.google.inject.util.Providers; import org.apache.wicket.Session; import org.apache.wicket.request.IRequestParameters; import org.apache.wicket.request.Request; import org.apache.wicket.request.Response; import org.apache.wicket.request.http.WebRequest; import org.apache.isis.viewer.wicket.viewer.IsisWicketApplication; import org.apache.isis.viewer.wicket.viewer.integration.wicket.AuthenticatedWebSessionForIsis; import de.agilecoders.wicket.core.Bootstrap; import de.agilecoders.wicket.core.settings.IBootstrapSettings; import de.agilecoders.wicket.themes.markup.html.bootswatch.BootswatchTheme; import de.agilecoders.wicket.themes.markup.html.bootswatch.BootswatchThemeProvider; /** * As specified in web.xml. * *

* See: * * 

 * <filter>
 *   <filter-name>wicket</filter-name>
 *    <filter-class>org.apache.wicket.protocol.http.WicketFilter</filter-class>
 *    <init-param>
 *      <param-name>applicationClassName</param-name>
 *      <param-value>webapp.SimpleApplication</param-value>
 *    </init-param>
 * </filter>
 *
* */ public class SimpleApplication extends IsisWicketApplication { private static final long serialVersionUID = 1L; /** * uncomment for a (slightly hacky) way of allowing logins using query args, eg: * * ?user=sven&pass=pass * *

* for demos only, obvious. */ private static final boolean DEMO_MODE_USING_CREDENTIALS_AS_QUERYARGS = false; @Override protected void init() { super.init(); IBootstrapSettings settings = Bootstrap.getSettings(); settings.setThemeProvider(new BootswatchThemeProvider(BootswatchTheme.Flatly)); } @Override public Session newSession(final Request request, final Response response) { if (!DEMO_MODE_USING_CREDENTIALS_AS_QUERYARGS) { return super.newSession(request, response); } // else demo mode final AuthenticatedWebSessionForIsis s = (AuthenticatedWebSessionForIsis) super.newSession(request, response); IRequestParameters requestParameters = request.getRequestParameters(); final org.apache.wicket.util.string.StringValue user = requestParameters.getParameterValue("user"); final org.apache.wicket.util.string.StringValue password = requestParameters.getParameterValue("pass"); s.signIn(user.toString(), password.toString()); return s; } @Override public WebRequest newWebRequest(HttpServletRequest servletRequest, String filterPath) { if (!DEMO_MODE_USING_CREDENTIALS_AS_QUERYARGS) { return super.newWebRequest(servletRequest, filterPath); } // else demo mode try { String uname = servletRequest.getParameter("user"); if (uname != null) { servletRequest.getSession().invalidate(); } } catch (Exception e) { System.out.println(e); } return super.newWebRequest(servletRequest, filterPath); } @Override protected Module newIsisWicketModule() { final Module isisDefaults = super.newIsisWicketModule(); final Module overrides = new AbstractModule() { @Override protected void configure() { bind(String.class).annotatedWith(Names.named("applicationName")).toInstance("Simple App"); bind(String.class).annotatedWith(Names.named("applicationCss")).toInstance( "css/application.css"); bind(String.class).annotatedWith(Names.named("applicationJs")).toInstance( "scripts/application.js"); bind(String.class).annotatedWith(Names.named("welcomeMessage")).toInstance( readLines(getClass(), "welcome.html")); bind(String.class).annotatedWith(Names.named("aboutMessage")).toInstance("Simple App"); bind(InputStream.class).annotatedWith(Names.named("metaInfManifest")).toProvider( Providers.of(getServletContext().getResourceAsStream("/META-INF/MANIFEST.MF"))); } }; return Modules.override(isisDefaults).with(overrides); } private static String readLines(final Class contextClass, final String resourceName) { try { List readLines = Resources.readLines(Resources.getResource(contextClass, resourceName), Charset.defaultCharset()); return Joiner.on("\n").join(readLines); } catch (IOException e) { return "This is a simple app"; } } } java-design-patterns-1.18.0/naked-objects/webapp/src/main/jettyconsole/000077500000000000000000000000001322244523500260555ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/src/main/jettyconsole/isis-banner.pdn000066400000000000000000002100321322244523500307700ustar00rootroot00000000000000PDN36 PPaintDotNet.Data, Version=3.510.4297.28969, Culture=neutral, PublicKeyToken=null ISystem, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089PaintDotNet.Document isDisposedlayerswidthheight savedWith userMetaDatauserMetadataItemsPaintDotNet.LayerListSystem.Version2System.Collections.Specialized.NameValueCollectionSystem.Collections.Generic.KeyValuePair`2[[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]][] w   PaintDotNet.LayerListparentArrayList+_itemsArrayList+_sizeArrayList+_versionPaintDotNet.Document  ASystem.Version_Major_Minor_Build _Revision$q2System.Collections.Specialized.NameValueCollectionReadOnly HashProviderComparerCountKeysValuesVersion2System.Collections.CaseInsensitiveHashCodeProvider*System.Collections.CaseInsensitiveComparer  System.Collections.Generic.KeyValuePair`2[[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]System.Collections.Generic.KeyValuePair`2[[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]keyvalue $exif.tag4D $exif.tag5/ $exif.tag67 $exif.tag77        2System.Collections.CaseInsensitiveHashCodeProviderm_textSystem.Globalization.TextInfo  *System.Collections.CaseInsensitiveComparer m_compareInfo System.Globalization.CompareInfo        % & ' ( )PPaintDotNet.Core, Version=3.510.4297.28965, Culture=neutral, PublicKeyToken=nullPaintDotNet.BitmapLayer propertiessurfaceLayer+isDisposed Layer+width Layer+heightLayer+properties-PaintDotNet.BitmapLayer+BitmapLayerPropertiesPaintDotNet.Surface)!PaintDotNet.Layer+LayerProperties * +w , - .w / 0 1w 2 3 4w 5 6 7w 8System.Globalization.TextInfom_listSeparator m_isReadOnlycustomCultureName m_nDataItemm_useUserOverride m_win32LangID   System.Globalization.CompareInfo win32LCIDculturem_name9%System.Collections.ArrayList_items_size_version :&% ;'% <(% =*-PaintDotNet.BitmapLayer+BitmapLayerPropertiesblendOp&PaintDotNet.UserBlendOps+NormalBlendOp >+PaintDotNet.Surfacescan0widthheightstridePaintDotNet.MemoryBlock)) ?w@,!PaintDotNet.Layer+LayerPropertiesname userMetaDatauserMetadataItemsvisible isBackgroundopacity2System.Collections.Specialized.NameValueCollectionSystem.Collections.Generic.KeyValuePair`2[[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]][]@Layer 2 A B-* C.+ Dw@/,ELayer 5 F B0* H1+ Iw@2,JLayer 3 K B3* M4+ Nw@5,OLayer 4 P B6* R7+ Sw@8,TLayer 5 U B: ; 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Q@IENDB`java-design-patterns-1.18.0/naked-objects/webapp/src/main/resources/000077500000000000000000000000001322244523500253455ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/src/main/resources/domainapp/000077500000000000000000000000001322244523500273155ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/src/main/resources/domainapp/webapp/000077500000000000000000000000001322244523500305735ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/src/main/resources/domainapp/webapp/welcome.html000066400000000000000000000036751322244523500331270ustar00rootroot00000000000000

Apache Isis™ is a platform to let you rapidly develop domain-driven apps in Java.

This app has been generated using Apache Isis' SimpleApp archetype, to create a purposefully minimal application that nevertheless includes fixture data, integration tests and BDD specs.

The app itself consists of a single domain class, SimpleObject, along with an equally simple (factory/repository) domain service, SimpleObjects.

For more details, see the Apache Isis website.

java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/000077500000000000000000000000001322244523500246115ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/WEB-INF/000077500000000000000000000000001322244523500256405ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/WEB-INF/isis.properties000066400000000000000000000227311322244523500307320ustar00rootroot00000000000000# Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, # software distributed under the License is distributed on an # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY # KIND, either express or implied. See the License for the # specific language governing permissions and limitations # under the License. ################################################################################# # # specify system components. # # The values correspond to the named components in the installer-registry.properties file # in the org.apache.isis.core:isis-core-runtime JAR (in the org.apache.isis.core.runtime package) # # Although all configuration could reside in isis.properties, the recommendation is # to split out into component specific files: # # xxx_yyy.properties files # # where # * xxx is the component type, and # * yyy is the component name. # # For example, viewer_wicket.properties holds configuration information specific to the Wicket viewer. # ################################################################################# # # configure the persistor (object store) to use # # JDO/DataNucleus objectstore isis.persistor=datanucleus # # configure authentication mechanism to use (to logon to the system) # #isis.authentication=bypass isis.authentication=shiro # # configure authorization mechanism to use # #isis.authorization=bypass isis.authorization=shiro ################################################################################# # # MetaModel # # The metamodel typically does not require additional configuration, although # the system components (defined above) may refine the metamodel for their needs. # ################################################################################# # # Additional programming model facet factories, or remove standard facet factories. # Comma separated list of fully qualified class names. # #isis.reflector.facets.include= #isis.reflector.facets.exclude= # # Metamodel validation (in addition to that automatically performed by the programming model facet factories) # Default implementation does nothing. # # Use a custom implementation to enforce additional constraints specific to your app/project/company. # #isis.reflector.validator=org.apache.isis.core.metamodel.metamodelvalidator.dflt.MetaModelValidatorDefault # # Whether to allow deprecated annotations/method prefixes (otherwise raise metamodel validation errors). # If not specified, default is to allow. # isis.reflector.validator.allowDeprecated=false # # Implementation to use for reading dynamic layout. Default implementation reads Xxx.layout.json files from classpath. # #isis.reflector.layoutMetadataReaders=org.apache.isis.core.metamodel.layoutmetadata.json.LayoutMetadataReaderFromJson # # patterns for applying CssClassFa facet (font-awesome icons), matching on action names # isis.reflector.facet.cssClassFa.patterns=\ new.*:fa-plus,\ add.*:fa-plus-square,\ create.*:fa-plus,\ update.*:fa-edit,\ change.*:fa-edit,\ remove.*:fa-minus-square,\ move.*:fa-exchange,\ first.*:fa-star,\ find.*:fa-search,\ lookup.*:fa-search,\ clear.*:fa-remove,\ previous.*:fa-step-backward,\ next.*:fa-step-forward,\ list.*:fa-list, \ all.*:fa-list, \ download.*:fa-download, \ upload.*:fa-upload, \ execute.*:fa-bolt, \ run.*:fa-bolt, \ calculate.*:fa-calculator, \ verify.*:fa-check-circle, \ refresh.*:fa-refresh, \ install.*:fa-wrench # # patterns for applying CssClass facet (CSS styles), matching on member names # isis.reflector.facet.cssClass.patterns=\ delete.*:btn-warning ################################################################################# # # Value facet defaults # # (see also viewer-specific config files, eg viewer_wicket.properties) # ################################################################################# # as used by @Title of a date isis.value.format.date=dd-MM-yyyy ################################################################################# # # Application Services and fixtures # ################################################################################# # # Specify the domain services. # # These are the most important configuration properties in the system, as they define # the set of the classes for Isis to instantiate as domain service singletons. # From these domain service instances the rest of the metamodel is discovered, while the # end-user gains access to other domain objects by invoking the actions of the domain services. # isis.services-installer=configuration-and-annotation isis.services.ServicesInstallerFromAnnotation.packagePrefix=domainapp # additional services/overriding default (@DomainService) implementations isis.services = # Specify the (optional) test fixtures # # Fixtures are used to seed the object store with an initial set of data. For the # in-memory object store, the fixtures are installed on every run. For other # object stores, they are used only when the object store is first initialized. # isis.fixtures=domainapp.fixture.scenarios.RecreateSimpleObjects # # required by EmailServiceDefault # #isis.service.email.sender.address=some.valid@email.address #isis.service.email.sender.password=the.password.for-isis.notification.email.sender.address # # whether ExceptionRecognizers should also log any recognized exceptions # (default false; enable for diagnostics/debugging) # #isis.services.exceprecog.logRecognizedExceptions=true # # disable to (automatically registered) ExceptionRecognizerCompositeForJdoObjectStore service # almost all of this service should be registered. Since all exception recognizer implementations # are consulted in the event of an exception, it's not sufficient to override the implementation # (in isis.services); instead this configuration property disables this particular implementation. # #isis.services.ExceptionRecognizerCompositeForJdoObjectStore.disable=true ################################################################################ # # Auditing, Publishing, Command # ################################################################################ # # Whether changes to objects should be audited; if not set, defaults to "none" # - if not set or set to "none", can explicitly enable using @DomainObject(auditing=Auditing.ENABLED) # - if set to "all", can explicitly disable using @Object(auditing=Auditing.DISABLED) # #isis.services.audit.objects=all|none # # Whether changes to objects should be published; if not set, defaults to "none" # - if not set or set to "none", can explicitly enable using @DomainObject(publishing=Publishing.ENABLED) # - if set to "all", can explicitly disable using @Object(publishing=Publishing.DISABLED) # #isis.services.publish.objects=all|none # # Whether all (or all non-query only) actions should be published; if not set, defaults to "none" # - if not set or set to "none", can explicitly enable using @Action(publishing=Publishing.ENABLED) # - if set to "all", can explicitly disable using @Action(publishing=Publishing.DISABLED) # #isis.services.publish.actions=all|none|ignoreQueryOnly # # Whether all (or all non-query only) actions should be reified as commands; if not set, defaults to "none" # - if not set or set to "none", can explicitly enable using @Action(command=CommandReification.ENABLED) # - if set to "all", can explicitly disable using @Action(command=CommandReification.DISABLED) # #isis.services.command.actions=all|none|ignoreQueryOnly ################################################################################ # # Policies # ################################################################################# # # Whether editing of object properties is allowed; if not set, defaults to "true" # - if not set or set to "true", can explicitly disable using @DomainObject(editing=Editing.DISABLED) # - if set to "false", can explicitly enable using @DomainObject(editing=Editing.ENABLED) # #isis.objects.editing=true|false ################################################################################ # # i18n # ################################################################################# # # force read translations, even if running in prototype mode # #isis.services.translation.po.mode=read ################################################################################ # # Viewer defaults # ################################################################################# # # Specify viewer defaults # #isis.viewers.paged.standalone=30 #isis.viewers.paged.parented=10 #isis.viewers.propertyLayout.labelPosition=LEFT #isis.viewers.parameterLayout.labelPosition=LEFT java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/WEB-INF/persistor.properties000066400000000000000000000114441322244523500320140ustar00rootroot00000000000000# Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, # software distributed under the License is distributed on an # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY # KIND, either express or implied. See the License for the # specific language governing permissions and limitations # under the License. ################################################################################# # # Persistor # ################################################################################# # generally speaking this should not be enabled isis.persistor.disableConcurrencyChecking=false ################################################################################# # # JDBC configuration # ################################################################################# # # configuration file holding the JDO objectstore's JDBC configuration # (this is a bit of a hack... just exploiting fact that Isis also loads this file) # # # JDBC connection details # (also update the pom.xml to reference the appropriate JDBC driver) # # # HSQLDB in-memory # isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionDriverName=org.hsqldb.jdbcDriver isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionURL=jdbc:hsqldb:mem:test isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionUserName=sa isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionPassword= # # HSQLDB in-memory (using log4jdbc-remix) # #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionDriverName=net.sf.log4jdbc.DriverSpy #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionURL=jdbc:log4jdbc:hsqldb:mem:test #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionUserName=sa #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionPassword= # # HSQLDB to file # #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionDriverName=org.hsqldb.jdbcDriver #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionURL=jdbc:hsqldb:file:/tmp/isis-simple-app/hsql-db;hsqldb.write_delay=false;shutdown=true #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionUserName=sa #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionPassword= # # HSQLDB to file (using log4jdbc-remix) # #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionDriverName=net.sf.log4jdbc.DriverSpy #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionURL=jdbc:log4jdbc:hsqldb:file:/tmp/isis-simple-app/hsql-db;hsqldb.write_delay=false;shutdown=true #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionUserName=sa #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionPassword= # # PostgreSQL Server # #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionDriverName=org.postgresql.Driver #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionURL=jdbc:postgresql://localhost:5432/isis #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionUserName=isis #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionPassword=isis # # PostgreSQL Server (using log4jdbc-remix) # #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionDriverName=net.sf.log4jdbc.DriverSpy #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionURL=jdbc:log4jdbc:postgresql://localhost:5432/isis #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionUserName=isis #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionPassword=isis # # MS SQL Server # #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionDriverName=com.microsoft.sqlserver.jdbc.SQLServerDriver #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionURL=jdbc:sqlserver://127.0.0.1:1433;instance=.;databaseName=simple #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionUserName=sa #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionPassword=p4ssword # # MS SQL Server (using log4jdbc-remix) # #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionDriverName=net.sf.log4jdbc.DriverSpy #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionURL=jdbc:log4jdbc:sqlserver://127.0.0.1:1433;instance=SQLEXPRESS;databaseName=jdo #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionUserName=jdo #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionPassword=jdopass # # neo4j # (experimental; run with -P neo4j profile in webapp project) # #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionURL=neo4j:neo4j_DB persistor_datanucleus.properties000066400000000000000000000062641322244523500343310ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/WEB-INF# Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, # software distributed under the License is distributed on an # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY # KIND, either express or implied. See the License for the # specific language governing permissions and limitations # under the License. # # configuration file for the JDO/DataNucleus objectstore # # identifies @PersistenceCapable entities to be eagerly registered # if move class to other package (eg com.mycompany.myapp.dom) then update isis.persistor.datanucleus.RegisterEntities.packagePrefix=domainapp.dom.modules # # hook to perform additional initialization when JDO class metadata is loaded # default implementation will attempt to run 'create schema' for the specified schema. # #isis.persistor.datanucleus.classMetadataLoadedListener=org.apache.isis.objectstore.jdo.datanucleus.CreateSchemaFromClassMetadata # whether to persist the event data as a "clob" or as a "zipped" byte[] # default is "zipped" #isis.persistor.datanucleus.PublishingService.serializedForm=zipped ##################################################################### # # DataNucleus' configuration # # The 'isis.persistor.datanucleus.impl' prefix is stripped off, # remainder is passed through to DataNucleus # ##################################################################### isis.persistor.datanucleus.impl.datanucleus.schema.autoCreateAll=true isis.persistor.datanucleus.impl.datanucleus.schema.validateTables=true isis.persistor.datanucleus.impl.datanucleus.schema.validateConstraints=true # # Require explicit persistence (since entities are Comparable and using ObjectContracts#compareTo). # see http://www.datanucleus.org/products/accessplatform_3_0/jdo/transaction_types.html # isis.persistor.datanucleus.impl.datanucleus.persistenceByReachabilityAtCommit=false # # How column names are identified # (http://www.datanucleus.org/products/datanucleus/jdo/orm/datastore_identifiers.html) # isis.persistor.datanucleus.impl.datanucleus.identifier.case=MixedCase # # L2 cache # off except if explicitly marked as cacheable # http://www.datanucleus.org/products/datanucleus/jdo/cache.html # isis.persistor.datanucleus.impl.datanucleus.cache.level2.type=none isis.persistor.datanucleus.impl.datanucleus.cache.level2.mode=ENABLE_SELECTIVE # # uncomment to use JNDI rather than direct JDBC # #isis.persistor.datanucleus.impl.datanucleus.ConnectionFactoryName=java:comp/env/jdbc/quickstart # # uncomment to use JTA resource # #isis.persistor.datanucleus.impl.datanucleus.ConnectionFactory2Name=java:comp/env/jdbc/quickstart-nontx #isis.persistor.datanucleus.impl.javax.jdo.option.TransactionType=JTA # # # JDBC connection details # ... are in persistor.properties # # java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/WEB-INF/shiro.ini000066400000000000000000000061051322244523500274670ustar00rootroot00000000000000# # Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, # software distributed under the License is distributed on an # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY # KIND, either express or implied. See the License for the # specific language governing permissions and limitations # under the License. # [main] contextFactory = org.apache.isis.security.shiro.IsisLdapContextFactory contextFactory.url = ldap://localhost:10389 contextFactory.authenticationMechanism = CRAM-MD5 contextFactory.systemAuthenticationMechanism = simple contextFactory.systemUsername = uid=admin,ou=system contextFactory.systemPassword = secret ldapRealm = org.apache.isis.security.shiro.IsisLdapRealm ldapRealm.contextFactory = $contextFactory ldapRealm.searchBase = ou=groups,o=mojo ldapRealm.groupObjectClass = groupOfUniqueNames ldapRealm.uniqueMemberAttribute = uniqueMember ldapRealm.uniqueMemberAttributeValueTemplate = uid={0} # optional mapping from physical groups to logical application roles #ldapRealm.rolesByGroup = \ # LDN_USERS: user_role,\ # NYK_USERS: user_role,\ # HKG_USERS: user_role,\ # GLOBAL_ADMIN: admin_role,\ # DEMOS: self-install_role ldapRealm.permissionsByRole=\ user_role = *:ToDoItemsJdo:*:*,\ *:ToDoItem:*:*; \ self-install_role = *:ToDoItemsFixturesService:install:* ; \ admin_role = * # to use ldap... # (see docs for details of how to setup users/groups in Apache Directory Studio). #securityManager.realms = $ldapRealm # to use .ini file securityManager.realms = $iniRealm # ----------------------------------------------------------------------------- # Users and their assigned roles # # Each line conforms to the format defined in the # org.apache.shiro.realm.text.TextConfigurationRealm#setUserDefinitions JavaDoc # ----------------------------------------------------------------------------- [users] # user = password, role1, role2, role3, ... sven = pass, admin_role dick = pass, user_role, self-install_role bob = pass, user_role, self-install_role joe = pass, user_role, self-install_role guest = guest, user_role # ----------------------------------------------------------------------------- # Roles with assigned permissions # # Each line conforms to the format defined in the # org.apache.shiro.realm.text.TextConfigurationRealm#setRoleDefinitions JavaDoc # ----------------------------------------------------------------------------- [roles] # role = perm1, perm2, perm3, ... # perm in format: packageName:className:memberName:r,w user_role = *:SimpleObjects:*:*,\ *:SimpleObject:*:* self-install_role = *:DomainAppFixtureService:*:* admin_role = * java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/WEB-INF/translations-en.po000066400000000000000000000135351322244523500313300ustar00rootroot00000000000000############################################################################## # # .pot file # # Translate this file to each required language and place in WEB-INF, eg: # # /WEB-INF/translations-en_US.po # /WEB-INF/translations-en.po # /WEB-INF/translations-fr_FR.po # /WEB-INF/translations-fr.po # /WEB-INF/translations.po # # If the app uses TranslatableString (eg for internationalized validation # messages), or if the app calls the TranslationService directly, then ensure # that all text to be translated has been captured by running a full # integration test suite that exercises all relevant behaviour # ############################################################################## #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#downloadTranslations(java.lang.String) msgid ".pot file name" msgstr ".pot file name" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#resetTranslationCache() msgid "Clear translation cache" msgstr "Clear translation cache" #: domainapp.dom.modules.simple.SimpleObjects#create() msgid "Create" msgstr "Create" #: org.apache.isis.applib.fixturescripts.FixtureScript#discoverable msgid "Discoverable" msgstr "Discoverable" #: org.apache.isis.applib.fixtures.FixtureType#DOMAIN_OBJECTS msgid "Domain Objects" msgstr "Domain Objects" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#downloadTranslations() msgid "Download Translations" msgstr "Download Translations" #: domainapp.dom.modules.simple.SimpleObject#updateName() msgid "Exclamation mark is not allowed" msgstr "Exclamation mark is not allowed" #: domainapp.dom.modules.simple.SimpleObjects#findByName() msgid "Find By Name" msgstr "Find By Name" #: org.apache.isis.applib.fixturescripts.FixtureResult#fixtureScriptClassName msgid "Fixture script" msgstr "Fixture script" #: org.apache.isis.applib.fixturescripts.FixtureScript#friendlyName msgid "Friendly Name" msgstr "Friendly Name" #: domainapp.dom.modules.simple.SimpleObject msgid "General" msgstr "General" #: domainapp.dom.app.homepage.HomePageService#homePage() msgid "Home Page" msgstr "Home Page" #: domainapp.dom.modules.simple.SimpleObjects#listAll() msgid "List All" msgstr "List All" #: org.apache.isis.applib.fixturescripts.FixtureScript#localName msgid "Local Name" msgstr "Local Name" #: org.apache.isis.applib.fixturescripts.FixtureScript#lookup() #: org.apache.isis.applib.services.bookmark.BookmarkHolderActionContributions#lookup() msgid "Lookup" msgstr "Lookup" #: domainapp.dom.modules.simple.SimpleObject#name #: domainapp.dom.modules.simple.SimpleObjects#create(java.lang.String) #: domainapp.dom.modules.simple.SimpleObjects#findByName(java.lang.String) msgid "Name" msgstr "Name" #: domainapp.dom.modules.simple.SimpleObject#updateName(java.lang.String) msgid "New name" msgstr "New name" #: org.apache.isis.applib.services.bookmark.BookmarkHolderAssociationContributions#object() msgid "Object" msgstr "Object" #: domainapp.dom.modules.simple.SimpleObject#title() msgid "Object: {name}" msgstr "Object: {name}" #: domainapp.dom.app.homepage.HomePageViewModel#objects msgid "Objects" msgstr "Objects" #: org.apache.isis.applib.fixtures.FixtureType#OTHER msgid "Other" msgstr "Other" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) msgid "Parameters" msgstr "Parameters" #: domainapp.fixture.DomainAppFixturesService #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu msgid "Prototyping" msgstr "Prototyping" #: domainapp.fixture.DomainAppFixturesService#recreateObjectsAndReturnFirst() msgid "Recreate Objects And Return First" msgstr "Recreate Objects And Return First" #: org.apache.isis.applib.fixturescripts.FixtureResult#object msgid "Result" msgstr "Result" #: org.apache.isis.applib.fixturescripts.FixtureResult#className msgid "Result class" msgstr "Result class" #: org.apache.isis.applib.fixturescripts.FixtureResult#key msgid "Result key" msgstr "Result key" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript() #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript() msgid "Run Fixture Script" msgstr "Run Fixture Script" #: org.apache.isis.applib.fixturescripts.FixtureScript msgid "Script" msgstr "Script" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) msgid "Script-specific parameters (if any). The format depends on the script implementation (eg key=value, CSV, JSON, XML etc)" msgstr "Script-specific parameters (if any). The format depends on the script implementation (eg key=value, CSV, JSON, XML etc)" #: domainapp.dom.modules.simple.SimpleObjects#title() msgid "Simple Objects" msgstr "Simple Objects" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#switchToReadingTranslations() msgid "Switch To Reading Translations" msgstr "Switch To Reading Translations" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#switchToWritingTranslations() msgid "Switch To Writing Translations" msgstr "Switch To Writing Translations" #: org.apache.isis.applib.fixturescripts.FixtureScript#type msgid "Type" msgstr "Type" #: domainapp.dom.modules.simple.SimpleObject#updateName() msgid "Update Name" msgstr "Update Name" #: domainapp.dom.modules.simple.SimpleObject msgid "name" msgstr "" ############################################################################## # end of .pot file ############################################################################## java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/WEB-INF/translations-es.po000066400000000000000000000136311322244523500313320ustar00rootroot00000000000000############################################################################## # # .pot file # # Translate this file to each required language and place in WEB-INF, eg: # # /WEB-INF/translations-en_US.po # /WEB-INF/translations-en.po # /WEB-INF/translations-fr_FR.po # /WEB-INF/translations-fr.po # /WEB-INF/translations.po # # If the app uses TranslatableString (eg for internationalized validation # messages), or if the app calls the TranslationService directly, then ensure # that all text to be translated has been captured by running a full # integration test suite that exercises all relevant behaviour # ############################################################################## #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#downloadTranslations(java.lang.String) msgid ".pot file name" msgstr "fichero .pot" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#resetTranslationCache() msgid "Clear translation cache" msgstr "Limpiar la caché de traducciones" #: domainapp.dom.modules.simple.SimpleObjects#create() msgid "Create" msgstr "Crear" #: org.apache.isis.applib.fixturescripts.FixtureScript#discoverable msgid "Discoverable" msgstr "Descubrible" #: org.apache.isis.applib.fixtures.FixtureType#DOMAIN_OBJECTS msgid "Domain Objects" msgstr "Domain Objects" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#downloadTranslations() msgid "Download Translations" msgstr "Descargar traducciones" #: domainapp.dom.modules.simple.SimpleObject#updateName() msgid "Exclamation mark is not allowed" msgstr "No se admite el signo de exclamación" #: domainapp.dom.modules.simple.SimpleObjects#findByName() msgid "Find By Name" msgstr "Buscar por Nombre" #: org.apache.isis.applib.fixturescripts.FixtureResult#fixtureScriptClassName msgid "Fixture script" msgstr "Script de Instalación" #: org.apache.isis.applib.fixturescripts.FixtureScript#friendlyName msgid "Friendly Name" msgstr "Nombre común" #: domainapp.dom.app.homepage.HomePageService#homePage() msgid "Home Page" msgstr "Página de Inicio" #: domainapp.dom.modules.simple.SimpleObjects#listAll() msgid "List All" msgstr "Listar Todos" #: org.apache.isis.applib.fixturescripts.FixtureScript#localName msgid "Local Name" msgstr "Nombre Local" #: org.apache.isis.applib.fixturescripts.FixtureScript#lookup() #: org.apache.isis.applib.services.bookmark.BookmarkHolderActionContributions#lookup() msgid "Lookup" msgstr "Buscar" #: domainapp.dom.modules.simple.SimpleObject#name #: domainapp.dom.modules.simple.SimpleObjects#create(java.lang.String) #: domainapp.dom.modules.simple.SimpleObjects#findByName(java.lang.String) msgid "Name" msgstr "Nombre" #: domainapp.dom.modules.simple.SimpleObject#updateName(java.lang.String) msgid "New name" msgstr "Nuevo nombre" #: org.apache.isis.applib.services.bookmark.BookmarkHolderAssociationContributions#object() msgid "Object" msgstr "Objeto" #: domainapp.dom.modules.simple.SimpleObject#title() msgid "Object: {name}" msgstr "Objeto: {name}" #: domainapp.dom.app.homepage.HomePageViewModel#objects msgid "Objects" msgstr "Objetos" #: org.apache.isis.applib.fixtures.FixtureType#OTHER msgid "Other" msgstr "Other" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) msgid "Parameters" msgstr "Parámetros" #: domainapp.fixture.DomainAppFixturesService #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu msgid "Prototyping" msgstr "Prototipo" #: domainapp.fixture.DomainAppFixturesService#recreateObjectsAndReturnFirst() msgid "Recreate Objects And Return First" msgstr "Recrear Objetos y Devolver el Primero" #: org.apache.isis.applib.fixturescripts.FixtureResult#object msgid "Result" msgstr "Resultado" #: org.apache.isis.applib.fixturescripts.FixtureResult#className msgid "Result class" msgstr "Clase del resultado" #: org.apache.isis.applib.fixturescripts.FixtureResult#key msgid "Result key" msgstr "Clave del Resultado" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript() #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript() msgid "Run Fixture Script" msgstr "Ejecutar Script de Instalación" #: org.apache.isis.applib.fixturescripts.FixtureScript msgid "Script" msgstr "Script" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) msgid "Script-specific parameters (if any). The format depends on the script implementation (eg key=value, CSV, JSON, XML etc)" msgstr "Parámetros específicos del Script (si hay alguno). El formato depende de la implementación del script (por ejemplo, clave=valor, CSV, JSON, XML, etc.)" #: domainapp.dom.modules.simple.SimpleObjects#title() msgid "Simple Objects" msgstr "Objetos básicos" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#switchToReadingTranslations() msgid "Switch To Reading Translations" msgstr "Cambiar a Lectura de Traducciones" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#switchToWritingTranslations() msgid "Switch To Writing Translations" msgstr "Cambiar a Escritura de Traducciones" #: org.apache.isis.applib.fixturescripts.FixtureScript#type msgid "Type" msgstr "Tipo" #: domainapp.dom.modules.simple.SimpleObject#updateName() msgid "Update Name" msgstr "Nombre de la Actualización" #: domainapp.dom.modules.simple.SimpleObject msgid "name" msgstr "" ############################################################################## # end of .pot file ############################################################################## java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/WEB-INF/translations-nl.po000066400000000000000000000125271322244523500313370ustar00rootroot00000000000000############################################################################## # # .pot file # # Translate this file to each required language and place in WEB-INF, eg: # # /WEB-INF/translations-en_US.po # /WEB-INF/translations-en.po # /WEB-INF/translations-fr_FR.po # /WEB-INF/translations-fr.po # /WEB-INF/translations.po # # If the app uses TranslatableString (eg for internationalized validation # messages), or if the app calls the TranslationService directly, then ensure # that all text to be translated has been captured by running a full # integration test suite that exercises all relevant behaviour # ############################################################################## #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#downloadTranslations(java.lang.String) msgid ".pot file name" msgstr "" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#resetTranslationCache() msgid "Clear translation cache" msgstr "" #: domainapp.dom.modules.simple.SimpleObjects#create() msgid "Create" msgstr "Creëren" #: org.apache.isis.applib.fixturescripts.FixtureScript#discoverable msgid "Discoverable" msgstr "Discoverable" #: org.apache.isis.applib.fixtures.FixtureType#DOMAIN_OBJECTS msgid "Domain Objects" msgstr "Domain Objects" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#downloadTranslations() msgid "Download Translations" msgstr "" #: domainapp.dom.modules.simple.SimpleObject#updateName() msgid "Exclamation mark is not allowed" msgstr "" #: domainapp.dom.modules.simple.SimpleObjects#findByName() msgid "Find By Name" msgstr "Zoek op Naam" #: org.apache.isis.applib.fixturescripts.FixtureResult#fixtureScriptClassName msgid "Fixture script" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript#friendlyName msgid "Friendly Name" msgstr "" #: domainapp.dom.app.homepage.HomePageService#homePage() msgid "Home Page" msgstr "" #: domainapp.dom.modules.simple.SimpleObjects#listAll() msgid "List All" msgstr "Lijst Alle" #: org.apache.isis.applib.fixturescripts.FixtureScript#localName msgid "Local Name" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript#lookup() #: org.apache.isis.applib.services.bookmark.BookmarkHolderActionContributions#lookup() msgid "Lookup" msgstr "" #: domainapp.dom.modules.simple.SimpleObject#name #: domainapp.dom.modules.simple.SimpleObjects#create(java.lang.String) #: domainapp.dom.modules.simple.SimpleObjects#findByName(java.lang.String) msgid "Name" msgstr "Naam" #: domainapp.dom.modules.simple.SimpleObject#updateName(java.lang.String) msgid "New name" msgstr "Nieuwe naam" #: org.apache.isis.applib.services.bookmark.BookmarkHolderAssociationContributions#object() msgid "Object" msgstr "" #: domainapp.dom.modules.simple.SimpleObject#title() msgid "Object: {name}" msgstr "" #: domainapp.dom.app.homepage.HomePageViewModel#objects msgid "Objects" msgstr "Objects" #: org.apache.isis.applib.fixtures.FixtureType#OTHER msgid "Other" msgstr "Other" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) msgid "Parameters" msgstr "" #: domainapp.fixture.DomainAppFixturesService #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu msgid "Prototyping" msgstr "" #: domainapp.fixture.DomainAppFixturesService#recreateObjectsAndReturnFirst() msgid "Recreate Objects And Return First" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureResult#object msgid "Result" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureResult#className msgid "Result class" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureResult#key msgid "Result key" msgstr "" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript() #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript() msgid "Run Fixture Script" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript msgid "Script" msgstr "" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) msgid "Script-specific parameters (if any). The format depends on the script implementation (eg key=value, CSV, JSON, XML etc)" msgstr "" #: domainapp.dom.modules.simple.SimpleObjects#title() msgid "Simple Objects" msgstr "Eenvoudige Objecten" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#switchToReadingTranslations() msgid "Switch To Reading Translations" msgstr "" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#switchToWritingTranslations() msgid "Switch To Writing Translations" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript#type msgid "Type" msgstr "" #: domainapp.dom.modules.simple.SimpleObject#updateName() msgid "Update Name" msgstr "Updaten Naam" #: domainapp.dom.modules.simple.SimpleObject msgid "name" msgstr "" ############################################################################## # end of .pot file ############################################################################## java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/WEB-INF/translations.po000066400000000000000000000124641322244523500307300ustar00rootroot00000000000000############################################################################## # # .pot file # # Translate this file to each required language and place in WEB-INF, eg: # # /WEB-INF/translations-en_US.po # /WEB-INF/translations-en.po # /WEB-INF/translations-fr_FR.po # /WEB-INF/translations-fr.po # /WEB-INF/translations.po # # If the app uses TranslatableString (eg for internationalized validation # messages), or if the app calls the TranslationService directly, then ensure # that all text to be translated has been captured by running a full # integration test suite that exercises all relevant behaviour # ############################################################################## #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#downloadTranslations(java.lang.String) msgid ".pot file name" msgstr "" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#resetTranslationCache() msgid "Clear translation cache" msgstr "" #: domainapp.dom.modules.simple.SimpleObjects#create() msgid "Create" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript#discoverable msgid "Discoverable" msgstr "" #: org.apache.isis.applib.fixtures.FixtureType#DOMAIN_OBJECTS msgid "Domain Objects" msgstr "" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#downloadTranslations() msgid "Download Translations" msgstr "" #: domainapp.dom.modules.simple.SimpleObject#updateName() msgid "Exclamation mark is not allowed" msgstr "" #: domainapp.dom.modules.simple.SimpleObjects#findByName() msgid "Find By Name" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureResult#fixtureScriptClassName msgid "Fixture script" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript#friendlyName msgid "Friendly Name" msgstr "" #: domainapp.dom.modules.simple.SimpleObject msgid "General" msgstr "Common" #: domainapp.dom.app.homepage.HomePageService#homePage() msgid "Home Page" msgstr "" #: domainapp.dom.modules.simple.SimpleObjects#listAll() msgid "List All" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript#localName msgid "Local Name" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript#lookup() #: org.apache.isis.applib.services.bookmark.BookmarkHolderActionContributions#lookup() msgid "Lookup" msgstr "" #: domainapp.dom.modules.simple.SimpleObject#name #: domainapp.dom.modules.simple.SimpleObjects#create(java.lang.String) #: domainapp.dom.modules.simple.SimpleObjects#findByName(java.lang.String) msgid "Name" msgstr "" #: domainapp.dom.modules.simple.SimpleObject#updateName(java.lang.String) msgid "New name" msgstr "" #: org.apache.isis.applib.services.bookmark.BookmarkHolderAssociationContributions#object() msgid "Object" msgstr "" #: domainapp.dom.modules.simple.SimpleObject#title() msgid "Object: {name}" msgstr "" #: domainapp.dom.app.homepage.HomePageViewModel#objects msgid "Objects" msgstr "" #: org.apache.isis.applib.fixtures.FixtureType#OTHER msgid "Other" msgstr "" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) msgid "Parameters" msgstr "" #: domainapp.fixture.DomainAppFixturesService #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu msgid "Prototyping" msgstr "" #: domainapp.fixture.DomainAppFixturesService#recreateObjectsAndReturnFirst() msgid "Recreate Objects And Return First" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureResult#object msgid "Result" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureResult#className msgid "Result class" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureResult#key msgid "Result key" msgstr "" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript() #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript() msgid "Run Fixture Script" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript msgid "Script" msgstr "" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) msgid "Script-specific parameters (if any). The format depends on the script implementation (eg key=value, CSV, JSON, XML etc)" msgstr "" #: domainapp.dom.modules.simple.SimpleObjects#title() msgid "Simple Objects" msgstr "" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#switchToReadingTranslations() msgid "Switch To Reading Translations" msgstr "" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#switchToWritingTranslations() msgid "Switch To Writing Translations" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript#type msgid "Type" msgstr "" #: domainapp.dom.modules.simple.SimpleObject#updateName() msgid "Update Name" msgstr "" #: domainapp.dom.modules.simple.SimpleObject msgid "name" msgstr "" ############################################################################## # end of .pot file ############################################################################## viewer_restfulobjects.properties000066400000000000000000000054701322244523500343240ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/WEB-INF# Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, # software distributed under the License is distributed on an # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY # KIND, either express or implied. See the License for the # specific language governing permissions and limitations # under the License. # # configuration file for the Restful Objects viewer # # the baseUrl for hrefs in the events generated by the RO EventSerializer isis.viewer.restfulobjects.RestfulObjectsSpecEventSerializer.baseUrl=http://localhost:8080/restful/ # renders param details in the (incorrect) form that they were for GSOC2013 viewers # isis.viewer.restfulobjects.gsoc2013.legacyParamDetails=true # whether to honor UI hints, in particular Render(EAGERLY). Defaults to false. #isis.viewer.restfulobjects.honorUiHints=false ############################################################################### # Non-standard configuration settings. # # If enabled of the following are enabled then the viewer is deviating from the # RO spec standard; compatibility may be compromised with RO clients. ############################################################################### # whether to show only object properties for object members # (on the object representation only) # Takes precedence over the other 'suppress' below. #isis.viewer.restfulobjects.objectPropertyValuesOnly=true # whether to suppress "describedby" links. Defaults to false. #isis.viewer.restfulobjects.suppressDescribedByLinks=true # whether to suppress "update" links. Defaults to false. #isis.viewer.restfulobjects.suppressUpdateLink=true # whether to suppress "id" json-prop for object members. Defaults to false. #isis.viewer.restfulobjects.suppressMemberId=true # whether to suppress "links" json-prop for object members # (on the object representation only). Defaults to false. #isis.viewer.restfulobjects.suppressMemberLinks=true # whether to suppress "extensions" json-prop for object members # (on the object representation only). Defaults to false. #isis.viewer.restfulobjects.suppressMemberExtensions=true # whether to suppress "disabledReason" json-prop for object members # (on the object representation only). Defaults to false. #isis.viewer.restfulobjects.suppressMemberDisabledReason=true ############################################################################### java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/WEB-INF/viewer_wicket.properties000066400000000000000000000056151322244523500326340ustar00rootroot00000000000000# Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, # software distributed under the License is distributed on an # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY # KIND, either express or implied. See the License for the # specific language governing permissions and limitations # under the License. # # configuration file for the Wicket viewer # # # The maximum length of titles to display in standalone or parented tables. # Titles longer than this length will be truncated with trailing ellipses (...) # # For example, if set to 12, the title # "Buy milk on 15-Feb-13" will be truncated to "Buy milk ..." # # If set to 0, then only the icon will be shown. # isis.viewer.wicket.maxTitleLengthInStandaloneTables=0 isis.viewer.wicket.maxTitleLengthInParentedTables=0 #isis.viewer.wicket.datePattern=dd-MM-yyyy #isis.viewer.wicket.dateTimePattern=dd-MM-yyyy HH:mm #isis.viewer.wicket.datePickerPattern=DD-MM-YYYY #isis.viewer.wicket.datePattern=dd/MM/yy #isis.viewer.wicket.dateTimePattern=dd/MM/yy HH:mm #isis.viewer.wicket.datePickerPattern=DD/MM/YY # # whether to strip wicket tags from markup (default is true, as they may break some CSS rules) # #isis.viewer.wicket.stripWicketTags=false # # whether to suppress the 'rememberMe' checkbox on the login page (default is false) # #isis.viewer.wicket.suppressRememberMe=false # # if user attempts to access a protected URL before signing in, then as a convenience the viewer will continue # through to that destination after successful login. If you consider this to be a security risk then this flag # disables that behaviour (default is false). # #isis.viewer.wicket.clearOriginalDestination=true # # whether to show action dialogs on their own page rather than as a modal dialog (default is false) # #isis.viewer.wicket.disableModalDialogs=false # # the maximum number of pages to list in bookmark (default is 15) # #isis.viewer.wicket.bookmarkedPages.maxSize=15 # # whether to show the bootstrap theme chooser (defaults false) # #isis.viewer.wicket.themes.showChooser=false isis.viewer.wicket.themes.showChooser=true # # comma-separated list of themes to choose from (default is to show all themes from bootswatch.com). # #isis.viewer.wicket.themes.enabled=bootstrap-theme,Cosmo,Flatly,Darkly,Sandstone,United # # whether to automatically select dependent choice when the choice it depends upon changes. # #isis.viewer.wicket.disableDependentChoiceAutoSelection=falsejava-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/WEB-INF/web.xml000066400000000000000000000247001322244523500271420ustar00rootroot00000000000000 Simple app about/index.html org.apache.shiro.web.env.EnvironmentLoaderListener ShiroFilter org.apache.shiro.web.servlet.ShiroFilter ShiroFilter /* isis.viewers wicket,restfulobjects IsisLogOnExceptionFilter org.apache.isis.core.webapp.diagnostics.IsisLogOnExceptionFilter IsisLogOnExceptionFilter /wicket/* IsisLogOnExceptionFilter /restful/* ResourceCachingFilter org.apache.isis.core.webapp.content.ResourceCachingFilter CacheTime 86400 ResourceCachingFilter *.js ResourceCachingFilter *.css ResourceCachingFilter *.png ResourceCachingFilter *.jpg ResourceCachingFilter *.gif ResourceCachingFilter *.html ResourceCachingFilter *.swf Resource org.apache.isis.core.webapp.content.ResourceServlet Resource *.css Resource *.png Resource *.jpg Resource *.gif Resource *.js Resource *.html Resource *.swf WicketFilter org.apache.wicket.protocol.http.WicketFilter applicationClassName domainapp.webapp.SimpleApplication WicketFilter /wicket/* configuration development org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap javax.ws.rs.Application org.apache.isis.viewer.restfulobjects.server.RestfulObjectsApplication resteasy.servlet.mapping.prefix /restful/ IsisSessionFilterForRestfulObjects org.apache.isis.core.webapp.IsisSessionFilter authenticationSessionStrategy org.apache.isis.viewer.restfulobjects.server.authentication.AuthenticationSessionStrategyBasicAuth whenNoSession basicAuthChallenge IsisSessionFilterForRestfulObjects RestfulObjectsRestEasyDispatcher IsisTransactionFilterForRestfulObjects org.apache.isis.viewer.restfulobjects.server.webapp.IsisTransactionFilterForRestfulObjects IsisTransactionFilterForRestfulObjects RestfulObjectsRestEasyDispatcher RestfulObjectsRestEasyDispatcher org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher RestfulObjectsRestEasyDispatcher /restful/* java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/about/000077500000000000000000000000001322244523500257235ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/about/images/000077500000000000000000000000001322244523500271705ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/about/images/isis-logo.png000066400000000000000000000335201322244523500316060ustar00rootroot00000000000000PNG  IHDRUgsRGBgAMA a pHYsodtEXtSoftwarePaint.NET v3.5.100r6IDATx^}|Gw}{{1dPql06L9LA"A@lD090&0ȶ#ZꙞa4ɥFS]UꅪB恖-Z +<4j2e@@@2 99999999999999999G9p_:uU]eVḿ{n4=ӟd)9?́<ʁZ~㻻5Yxp GUw[s@s@s 9p[ iʁ?$g?[ȳN yVu54BŁpB.|!PInGs@s r YGȔ% )hɳ";99*+ܾ}[oY*]beƖdC"@B%́<ˁp#JgINN?$J@@8*>/'E[sd%2s~ZH@D[ Nih W^)ۄH;3F̋!h:'۸rL_w 7oޔ9#`(#2@Ve,R ڝ{],kF47!A"-\n@Ƶ˕Fnz7>+vчޠcʅAޟXa}; H"Lgdbݳ7?b&lsJ(C֕œz;"(pta;ApN퉣<Xm?os h7KA [ 5lywQM,x(/We+˞n%ƖC#k2El|!9ٽ|?^>G ?$/N9#h+ 0L۵Z8Ȳu"60#? 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DنͥEߛ p|@ ի2|ul=_yYY[Ԭ%KjԐժɲUdy  X#ˡdG"x+C8XR,>"CbERe4*?I4yV&;8O\[,@ۻ{Zo#OR1 U9Ds>lp^\!\+a|2l@Mt6 TT\,@炃%qa_,Z*QP KØ:-^;QA*xPt-V|1XIJ #jVoP_ySUMPc7;g@\< G#OmHu7t<[t~[*1UL$TdTm2A7IMJƣ&ånҠ iب4i4iM:Yo/=_n-ok.6A/6/4aϼ,kՑ5QUkJ5dtyXǩq2&6^بPEȸ22LiI*SJK$P$ 1,qpt֖‰L0x Ѭv83x\Ot'$B߭]b3–L+{9fX6\ǂzhT+8W ?wۢ [uuѤsK[@ '(O^Lx?a.J7\O݌ E!.Hy5Q]1e9DZRee4EqqPL.],y4eD_-IL-c)񠸞J\m-]bl%zV"ۮ6+LeRejHJ5[(%ΓMfK&oK&3$4j> P@LX;_TgDa+e`kvW(ERGʕul4ͽ9Cke}Creٸu$]/ \),  K'er^)^I[{ &UmخH:$FAQIT5UnD].eZ/ "X %D%̑gIߖ⍦JW'K+x$)^MȐkG T>T\dp_7H ]OYu( !eǸ_A?m ><y @Bj?"~nOLaft̚g-ݛn&w朣KD{3;]e&ڬCZtKysQ恔7UN|]޾}[\"O| ivJbTi c &P$cA {[A'@v6 $]hL&]6I,*%VOtǵa h,QڦIdezD`ʴZ"eZ.K&/8>["u;  r-yΙ6i+'u ieX0.L0gq'i|gZܛ䤈-a 3K=v2!|ŗr27mtKZ%J|D_ W\3@ Ȼ&<@,X#N$ nvA[N iT"ZHD+Z$aQ}10Lʌ ' .pQ0~ӪU=Ipq̾,T;1⼹0zdJP(X5/͛K?2o4H*t\$[,6N3!0mE#GOևA9b3d=@Ĵ>L B0-!dZ!-J0ztyu2qQܺu+W$̉sPFP  ߿19*_d,tƏJ7zꁸїI&Lk *8E V-|]L>j wVK4]StU8A} p_aX V+X@Jn(X&uGzCwȱL (!SxU'%́i1Ϙ~|&06ȹl,+#о: p'et5.Uju'Kf &Lπ?ܹY=##i4\:$mwHDH[ @B<9́@-RN囤TiD5%%ߘo27)XdbyVL< 0au_AF{~ۤ2o$x8jT4l1B VEMc}tQ: fJ\ 4q p` ueɾʖ}u/xn>% +}yPZ);Ө[ = FX4us΁P5VgR+-KIn8,vd]e˾<;RύFߴ-Ґ}Du.-.9ā{SyhUt>_ju!%kӌM`ToBו}+%UǾ~2L T!jhU/YI)RT)h}u{q["MxZ(^`QyuFϽ@xje^W'@Nq /q\t8Be4y45Q?^41%8#U <J=6H2t|/7?c+<$'(n T /dR׫99G8_rsyN8q6C%IRIR _h W,aۤsCv=aWY2?g 44.%_W_Gd^:i, Apache Isis™ SimpleApp
Isis Logo

This app has been generated using Apache Isis' SimpleApp archetype, to create a purposefully minimal application that nevertheless includes fixture data, integration tests and BDD specs.

The app itself consists of a single domain class, SimpleObject, along with an equally simple (factory/repository) domain service, SimpleObjects.

To access the app:

  • wicket/

    provides accesses to a generic UI for end-users, Isis' Wicket Viewer. As its name suggests, this viewer is built on top of Apache Wicket™.

  • restful/

    provides access to a RESTful API conformant with the Restful Objects spec. This is part of Apache Isis Core. The implementation technology is JBoss RestEasy.

The default user/password is sven/pass (as configured in the shiro.ini file).

java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/css/000077500000000000000000000000001322244523500254015ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/css/application.css000066400000000000000000000014731322244523500304230ustar00rootroot00000000000000/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/images/000077500000000000000000000000001322244523500260565ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/images/spinning-icon.gif000066400000000000000000000122221322244523500313170ustar00rootroot00000000000000GIF89a(EEEmmm! NETSCAPE2.0!"Created with Chimply.com"! ,((ڋ޼{ڄb扦6nL +*L،JuEUqٮ}}HNk NV1ȦgxᗈHhW2Xih` 998W *!9y[8iZ{ :+a<-A=H !@~\an. _m-!?HoOp,'lsW3[< =8H @I4A? Q6ty>+fD`y~tPd(#q4z)B!-dj>/sL1E_Š%iFY;­\%pE̽+.=|O7 NAFa yC! ,(Ɔ޼E L mbŇL*&(TU:DcOnN'lAٌSnu'D`xXeIy(RYy 2 Hi1yj)z P ں;[{{< <A\pZ, }D}mM8\[P 1PX+LNa:.O=On$5d^|MW/2HlEQE 7xdBFyAʀ3=8HpAQ -(krI+;D54S.'SM:귫vLy`? Sd颵hK*i`_v-g >6qU4rN((]Ôa[FWqSƛtfSף\ZOLe8ÅZwgޑU#97!ي?Xї F{nÑ?_}<_A4oHW1h! "1!]H$~ao%ȉ8B! ,(X0I!ͻ%di(욾p tmx+mpFo!:OtJZvdz5J.Sm|NVk]nKpqwsy{X >x}i-Z.ttSU5Ķk+ű";ѹ9ֹ ۸߷sU :r ౛ .@;ρs6hyh0U\iV gn) Cb"KV4s!0"%^r""H (c4w#:F#!A␀XgGV$1IIEV&$jm)& ]h)F&lBIH! ,(h0I8`(zZihVck,Ϙ`xmH,ȣ/tJZTGr]6-ZgaNxy_N7^oLqrxtz|Y @y~j/s|[0—suSV7l-μuʊUя;# TN?y 7!_=~ `!` >0W'z& y4tL_7ɮ  $ []~0&8:4E4W:y>z,$\”vVfm R 5Q#t;yps bnfƟy4qQ_gWszW`qsa80rn!hHe3^|u١iݴw6[\û7p[rstUuHev'uw"dWF$GPHUMXH9%sFV dl\v9%p򗦐٦ tg'xFPDI3z'F*)^8饘.Pi ! ,(0I8ͻ`(dihlp,tm{rwGpH,rk:(1ΜXvzJ[wކpdL~-m`@qeuUw ~ZopJyyZ\BE-WCs1ŜʛΚ\E 2 [ s0C=g&sA?eV$#SqˇͰV ℂ*K(a P(-,2b0Fs@.eϗ>وlͨM͔diGILS$Ea\Q!GPI I֝b7䬰XO?U0tWQGўԚ+[pF%FWH,%'Uw P_Ugۖo_7Ujy>c6˻`/>;}ktY]vXk L<%Ƌ5c]C-Y.eu_>Ma|IP"e0 ڀh #%"?@aXa؃Hav 'x`)Ň1A}sIFK)5iZ饋b6rkmƣshZ6ߝ>FHf ')GIgi X!8(ZzxH*xֺژXy;[{ٛ9ZnwP\Br 5DP]@vMWQz" 2ȑ$K<2ʕ,[| 3̙4kڼ;java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/scripts/000077500000000000000000000000001322244523500263005ustar00rootroot00000000000000java-design-patterns-1.18.0/naked-objects/webapp/src/main/webapp/scripts/application.js000066400000000000000000000022471322244523500311460ustar00rootroot00000000000000/* * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ $(document).ready(function() { /// here... });java-design-patterns-1.18.0/null-object/000077500000000000000000000000001322244523500200475ustar00rootroot00000000000000java-design-patterns-1.18.0/null-object/README.md000066400000000000000000000021001322244523500213170ustar00rootroot00000000000000--- layout: pattern title: Null Object folder: null-object permalink: /patterns/null-object/ categories: Behavioral tags: - Java - Difficulty-Beginner --- ## Intent In most object-oriented languages, such as Java or C#, references may be null. These references need to be checked to ensure they are not null before invoking any methods, because methods typically cannot be invoked on null references. Instead of using a null reference to convey absence of an object (for instance, a non-existent customer), one uses an object which implements the expected interface, but whose method body is empty. The advantage of this approach over a working default implementation is that a Null Object is very predictable and has no side effects: it does nothing. ![alt text](./etc/null-object.png "Null Object") ## Applicability Use the Null Object pattern when * you want to avoid explicit null checks and keep the algorithm elegant and easy to read. ## Credits * [Pattern Languages of Program Design](http://www.amazon.com/Pattern-Languages-Program-Design-Coplien/dp/0201607344/ref=sr_1_1) java-design-patterns-1.18.0/null-object/etc/000077500000000000000000000000001322244523500206225ustar00rootroot00000000000000java-design-patterns-1.18.0/null-object/etc/null-object.png000066400000000000000000000333651322244523500235600ustar00rootroot00000000000000PNG  IHDR9_6IDATxo&}]li_ݼ:m^rmqv/wc,ß,dc,qv1Cly',lg5dU"cEZe{']tڑr/W]U]]]QO?c!a@6&/dI}/?'o/g7_z|$L 76m0Naɉ;w3/9LZF5^,$lcQݗp$9耿Í?~㉗Y[G^ yݣ;C0F,>egzwCtGiܢ>$w+|Ȩ̌OUvɨK8YOz[ϑ?d陻" ӷm2= ҌDiTM@_"#^I U)9GN/dI>+o=w?/d὇?^{{B|?IV$24f\9n4/Ӵr3 F6#a꾄%DX;Grw] WK8YY N5X")?>T9MKwdF r-8NՉ6&#a꾄%D~+u_'rO-C ?e-aY|'GvbQxb5u LT%,'ž_O}q}QJn;̌4OCv/)|@LMDu_ɒ|",o=7-=~ϼKozzo~z(Pa)-ge[ДaMG`N~T%,3F!]}ñ;nGenY,f 0p(>PjnKk22|izT%,?NÓ>ߛǞ FsCN  a ,l , saaaa3 4 ÜAXؠAX  0g6h7[Mx2ZČaDG^hU̫_Zz lD'P,T['r~j܅Jenn>޵-4\3\ R1seDߒvA|²","a+ $G- (¢T@QxOV|)0H§+ILIhf <ɾ al;i|]WL[*"=@%g g@l@z‡ߥctD k129_3#>*}sd3> E lU'qx+^XѺ-¯"_YoVIf֮}","aD"!;8VV#Q]܃'_l| TaG [ٙ!WUofp+ZFX҆4FG[z$FcQ!@XDֱܜ8H8>M^e.HHD ɿz+2o2}?S AX (gan(AXiǝ&@9A0 a ,l , saa2agf.@PIi+vSdIµ<@6ɒ@XAXؠAX  FG@L½lV  FůtuO%l_rEЇ͹pZAJR(ҨAæ,g,  Fm#ɋ ['z7~^or _O= G  BӤI2sC/-f9nP8[N9iM22@$yi dcNg9'w>uo% iʽ&xaB RZ[B(edǹ&Cu hcLi6ҒGcf}#2RtKaJsb5f9[B?zZqVzxҕL"e_ Q+˷isq`񭨄bt35a>' b%˪d i8z|y(Af +D te*v߽&,?l:KaוS_}ؒSJW2 Ϗ%l8vmɎ-VnVVuYnnb$kȘُIrA”=cHJ/GnO\KdI6 0T,)K??OK؟ȮlG yd  ܗ#GyU}]7۱h+Pَ"T}Y@(;%\-`Or3uc A^8k7 {j7~t/Y&kh,x5? >/Պ>Oeڗo)Է/(ZY@X :8Nu㻯ʝ}ow;>L8=)&,;P+^HޟśqX--(:+ַ/(΄%ֺg/dA~^;`WQ%@ pbgqpV*>2UŁlH 3 }aDD :NԥZ匸i͐hky36,͇y.Da]vaV n6,ӥDa]vqIN{؎Rf:Sav , saaaa3 4 ÜAXؠAX  šs&Wue 4ՓZ#oS|̸GE7k$L,[PF}"bt g&ڊWuقJ{ڀ%,"Lj)ae5Pt1^n1fl"^[/p9wwni3ƫu dTeJ([9A7>p1Y;KXD)ameWr{dKٗ$mi&߮ށ:@v/bHXWHf7y!Qr.o3gMvoLxh$,"߈#a-fWƫzLuI#,Q*vX#1G ݽ ^=E}$^Q-I;;G]KvSDSN-e.&^T{(̽2s_W۽/a˸nuU=j4c|{m_ u me@^w+aNav , saaaa3 4 ÜAXؠAX  $ɛ^"NTLXahmZsnG2&}"bt Px͈шW$oۏ)aHķ=v0d=J b}$ls.u^(--y-#|El k9c<'鏲e!2+^ e7N- d@v/bH2?|aʁ0AAɛE}$ܗQ-i"|ElO ;1>۳?Җ?H&߯"{_–-#|3veu ٌ[F2&+aNU^-#|X' 0g ;h9A0 a ,l , saaa:]5g{9dO~k lmKn}h#giMK}"bt k/c|՜%qp$s'!]Ez}$l9[Ӵ@yi:Y@W8I^JTEl k9cvXxv* @xU>c;^YxucTk_L"b;F …q2Ux8ފ7Qp֘$ YjJܗ۟[5l$g,~11I ^UoH&aF!&4 O⥄t05얶/0AE=޹7Ġ%Po#a¥c(UB[iS Mq[8_X!cخ!aϝ;5i7ސRᔞt |i|̹?Ӈ6F}dǽsι#GQ؇%H0M0# p]\ k׮ DlWogY/ڀm2aZ'2CL$ qѐ:/+ SdK7$9;vɦ"(^ noo !bgpj^ 2T{1[*N.bH';}HǡGМ :¹stc9SxV,nPfzZ-`{Jةvx&b)lwZ^3;sZ7eT%4cXOjSps ۰~?~nnn2]Dl 6sÕ\?׏9R%v3ۜWpX?w\ǠҕX l"F:x`O)_gkjLD1 MuIVX҉ ro|e $c J䤃*m`s2i3:‚G!:wܮ] |k}+޹s!\vF@XoDz:c9FZZZ"gmԾ7bvv? 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AP9i?m_}[OrZ:Sn3`kkT֛?g`cv? r0MKmV鋢%߉h3B|C@Xꑊ {w>wځoy:S_RJRʨ(M`=%g:jq4$ifA3Nmė 5}9&`MˏKbG^7=yKVrq \8%Ĕv3䔶,egLJVMQ!R3'n=y_/YnvcCSU~u0f_- ( iɲ a!g*&ێz+{0Yru,هe%Vt,VʞQEX+oSB4ռ~׏>Wئ`:SrA^0Jg,eGxW-CXB?[랓fk6dOOщ.g#:2;HT,Fpҹs|V#ٸ@[ڶ5Zu7 e쩴dLue&|>V2~X^l7 ߅Z ºk|AX] a!w a9CP)ൠ,j@TVkEHAEכBkEZq`"\60kHa[ʚ x2n,BNa!jƁIJ&t)"!ek AP57 M.R@JrY| ,A-8PVZmAcHAPkE^Br-j0.R nV, APZqPHXi "JZusZqPLXi "qܾ"8^& AS/jTpe@XzR㠂/BPԗ^Qe@Xꘐ[]@Xw Ba5 A u ,.]Z%l[K ^K java-design-patterns-1.18.0/null-object/pom.xml000066400000000000000000000036501322244523500213700ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 null-object org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/null-object/src/000077500000000000000000000000001322244523500206365ustar00rootroot00000000000000java-design-patterns-1.18.0/null-object/src/main/000077500000000000000000000000001322244523500215625ustar00rootroot00000000000000java-design-patterns-1.18.0/null-object/src/main/java/000077500000000000000000000000001322244523500225035ustar00rootroot00000000000000java-design-patterns-1.18.0/null-object/src/main/java/com/000077500000000000000000000000001322244523500232615ustar00rootroot00000000000000java-design-patterns-1.18.0/null-object/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500251115ustar00rootroot00000000000000java-design-patterns-1.18.0/null-object/src/main/java/com/iluwatar/nullobject/000077500000000000000000000000001322244523500272525ustar00rootroot00000000000000java-design-patterns-1.18.0/null-object/src/main/java/com/iluwatar/nullobject/App.java000066400000000000000000000036741322244523500306470ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.nullobject; /** * * Null Object pattern replaces null values with neutral objects. Many times this simplifies * algorithms since no extra null checks are needed. *

* In this example we build a binary tree where the nodes are either normal or Null Objects. No null * values are used in the tree making the traversal easy. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { Node root = new NodeImpl("1", new NodeImpl("11", new NodeImpl("111", NullNode.getInstance(), NullNode.getInstance()), NullNode.getInstance()), new NodeImpl("12", NullNode.getInstance(), new NodeImpl("122", NullNode.getInstance(), NullNode.getInstance()))); root.walk(); } } java-design-patterns-1.18.0/null-object/src/main/java/com/iluwatar/nullobject/Node.java000066400000000000000000000025621322244523500310070ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.nullobject; /** * * Interface for binary tree node. * */ public interface Node { String getName(); int getTreeSize(); Node getLeft(); Node getRight(); void walk(); } java-design-patterns-1.18.0/null-object/src/main/java/com/iluwatar/nullobject/NodeImpl.java000066400000000000000000000042521322244523500316270ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.nullobject; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Implementation for binary tree's normal nodes. * */ public class NodeImpl implements Node { private static final Logger LOGGER = LoggerFactory.getLogger(NodeImpl.class); private final String name; private final Node left; private final Node right; /** * Constructor */ public NodeImpl(String name, Node left, Node right) { this.name = name; this.left = left; this.right = right; } @Override public int getTreeSize() { return 1 + left.getTreeSize() + right.getTreeSize(); } @Override public Node getLeft() { return left; } @Override public Node getRight() { return right; } @Override public String getName() { return name; } @Override public void walk() { LOGGER.info(name); if (left.getTreeSize() > 0) { left.walk(); } if (right.getTreeSize() > 0) { right.walk(); } } } java-design-patterns-1.18.0/null-object/src/main/java/com/iluwatar/nullobject/NullNode.java000066400000000000000000000034271322244523500316430ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.nullobject; /** * * Null Object implementation for binary tree node. *

* Implemented as Singleton, since all the NullNodes are the same. * */ public final class NullNode implements Node { private static NullNode instance = new NullNode(); private NullNode() {} public static NullNode getInstance() { return instance; } @Override public int getTreeSize() { return 0; } @Override public Node getLeft() { return null; } @Override public Node getRight() { return null; } @Override public String getName() { return null; } @Override public void walk() { // Do nothing } } java-design-patterns-1.18.0/null-object/src/test/000077500000000000000000000000001322244523500216155ustar00rootroot00000000000000java-design-patterns-1.18.0/null-object/src/test/java/000077500000000000000000000000001322244523500225365ustar00rootroot00000000000000java-design-patterns-1.18.0/null-object/src/test/java/com/000077500000000000000000000000001322244523500233145ustar00rootroot00000000000000java-design-patterns-1.18.0/null-object/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500251445ustar00rootroot00000000000000java-design-patterns-1.18.0/null-object/src/test/java/com/iluwatar/nullobject/000077500000000000000000000000001322244523500273055ustar00rootroot00000000000000java-design-patterns-1.18.0/null-object/src/test/java/com/iluwatar/nullobject/AppTest.java000066400000000000000000000025131322244523500315310ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.nullobject; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/null-object/src/test/java/com/iluwatar/nullobject/NullNodeTest.java000066400000000000000000000041611322244523500325320ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.nullobject; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertNull; import static org.junit.jupiter.api.Assertions.assertSame; /** * Date: 12/26/15 - 11:47 PM * * @author Jeroen Meulemeester */ public class NullNodeTest { /** * Verify if {@link NullNode#getInstance()} actually returns the same object instance */ @Test public void testGetInstance() { final NullNode instance = NullNode.getInstance(); assertNotNull(instance); assertSame(instance, NullNode.getInstance()); } @Test public void testFields() { final NullNode node = NullNode.getInstance(); assertEquals(0, node.getTreeSize()); assertNull(node.getName()); assertNull(node.getLeft()); assertNull(node.getRight()); } @Test public void testWalk() throws Exception { NullNode.getInstance().walk(); } } java-design-patterns-1.18.0/null-object/src/test/java/com/iluwatar/nullobject/TreeTest.java000066400000000000000000000124661322244523500317200ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.nullobject; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.slf4j.LoggerFactory; import java.util.LinkedList; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertSame; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Date: 12/26/15 - 11:44 PM * * @author Jeroen Meulemeester */ public class TreeTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(); } @AfterEach public void tearDown() { appender.stop(); } /** * During the tests, the same tree structure will be used, shown below. End points will be * terminated with the {@link NullNode} instance. * * 

   * root
   * ├── level1_a
   * │   ├── level2_a
   * │   │   ├── level3_a
   * │   │   └── level3_b
   * │   └── level2_b
   * └── level1_b
   *
*/ private static final Node TREE_ROOT; static { final NodeImpl level1B = new NodeImpl("level1_b", NullNode.getInstance(), NullNode.getInstance()); final NodeImpl level2B = new NodeImpl("level2_b", NullNode.getInstance(), NullNode.getInstance()); final NodeImpl level3A = new NodeImpl("level3_a", NullNode.getInstance(), NullNode.getInstance()); final NodeImpl level3B = new NodeImpl("level3_b", NullNode.getInstance(), NullNode.getInstance()); final NodeImpl level2A = new NodeImpl("level2_a", level3A, level3B); final NodeImpl level1A = new NodeImpl("level1_a", level2A, level2B); TREE_ROOT = new NodeImpl("root", level1A, level1B); } /** * Verify the number of items in the tree. The root has 6 children so we expect a {@link * Node#getTreeSize()} of 7 {@link Node}s in total. */ @Test public void testTreeSize() { assertEquals(7, TREE_ROOT.getTreeSize()); } /** * Walk through the tree and verify if every item is handled */ @Test public void testWalk() { TREE_ROOT.walk(); assertTrue(appender.logContains("root")); assertTrue(appender.logContains("level1_a")); assertTrue(appender.logContains("level2_a")); assertTrue(appender.logContains("level3_a")); assertTrue(appender.logContains("level3_b")); assertTrue(appender.logContains("level2_b")); assertTrue(appender.logContains("level1_b")); assertEquals(7, appender.getLogSize()); } @Test public void testGetLeft() throws Exception { final Node level1 = TREE_ROOT.getLeft(); assertNotNull(level1); assertEquals("level1_a", level1.getName()); assertEquals(5, level1.getTreeSize()); final Node level2 = level1.getLeft(); assertNotNull(level2); assertEquals("level2_a", level2.getName()); assertEquals(3, level2.getTreeSize()); final Node level3 = level2.getLeft(); assertNotNull(level3); assertEquals("level3_a", level3.getName()); assertEquals(1, level3.getTreeSize()); assertSame(NullNode.getInstance(), level3.getRight()); assertSame(NullNode.getInstance(), level3.getLeft()); } @Test public void testGetRight() throws Exception { final Node level1 = TREE_ROOT.getRight(); assertNotNull(level1); assertEquals("level1_b", level1.getName()); assertEquals(1, level1.getTreeSize()); assertSame(NullNode.getInstance(), level1.getRight()); assertSame(NullNode.getInstance(), level1.getLeft()); } private class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender() { ((Logger) LoggerFactory.getLogger("root")).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public boolean logContains(String message) { return log.stream().anyMatch(event -> event.getMessage().equals(message)); } public int getLogSize() { return log.size(); } } } java-design-patterns-1.18.0/object-mother/000077500000000000000000000000001322244523500203735ustar00rootroot00000000000000java-design-patterns-1.18.0/object-mother/README.md000066400000000000000000000016611322244523500216560ustar00rootroot00000000000000--- layout: pattern title: Object Mother folder: object-mother permalink: /patterns/object-mother/ categories: Creational tags: - Java - Difficulty-Beginner --- ## Object Mother Define a factory of immutable content with separated builder and factory interfaces. ![alt text](./etc/object-mother.png "Object Mother") ## Applicability Use the Object Mother pattern when * You want consistent objects over several tests * you want to reduce code for creation of objects in tests * every test should run with fresh data ## Credits * [Answer by David Brown](http://stackoverflow.com/questions/923319/what-is-an-objectmother) to the stackoverflow question: [What is an ObjectMother?](http://stackoverflow.com/questions/923319/what-is-an-objectmother) * [c2wiki - Object Mother](http://c2.com/cgi/wiki?ObjectMother) * [Nat Pryce - Test Data Builders: an alternative to the Object Mother pattern](http://www.natpryce.com/articles/000714.html) java-design-patterns-1.18.0/object-mother/etc/000077500000000000000000000000001322244523500211465ustar00rootroot00000000000000java-design-patterns-1.18.0/object-mother/etc/object-mother.png000066400000000000000000000463711322244523500244310ustar00rootroot00000000000000PNG  IHDRqLIDATxm\y?E`Cc vXJP\FEJ7%"䰖{MYWd1.rIF+lӥRҴިXԢLIHB_-?n̜93sΞ{^fg?<8;wyv;ϙg0}+ J '(12q5#(12!5l-OP8 C8 C8 C8 Cx6iP;Grp|ALFѤ7ؤJJq|jUI,4cnj;JY(O sbONJ/'PZርd.914c \Xb[ *cИdpYv,+>*1VPbe%JLSTaaswUPb_ %Va(/@]h0C.կǾr_>oxmQUf(/@]+{Ƴ}gɕK̫{دs%*=-ܣ˜%xį {_wk~/=,LTxQhnL@U<~3x?K;?xO^yٷ%΃ShUg=9-(Lvb6ymo^d9ߝJ|c޼}W|U\{7}O DtBl* gZﹸP댹#o)1,UV߻y5W>_w~s-Llwy|[7wリ-5^.%DLdD.wkLw *o">x^?2?vˬ>qkrS:8 YJ,L@U?u[7:/~u~/]_|l雷 +LD!y[vƙgu'櫿~ϵ:y?X]~y?rslq?*3sbNTz'8}>_Q7_?7X)qV>\;vzc@q}%4nD$`(w^>}R>7~GJ\+e~#Ŵ31V{1h[=9qlZJw_kM%JGI2!+T&r뼪z⁞)Ey}O4+e*1c`պܪӅr[6Mg^ *xVdqϪ僚Z=~WJ u1ߕxu %Va(/@]h0C.aJ싡P]1GGuOQb 0l@C.aXgJL&w (qqL@P0ɲL(1%ê+1,d@]P0ɲL(1%rL(1e%:\Yg+vIē),_;%J uiOWhײ:Ju&KG}C`PV}7f7U#?\Fۢ3gmkFrQ*m[wzڷRac|=3/FbrG0SD5H3ٞdYXn#~xQ[҅BӃY]K K_Ť uG+쫭n4L=KL%V58}RXX&l0lMXT=vٸ}%N@8ROi= %UO\zVo(/w:ᗔ˗Jޜ#iˠT&iXtYt:7WM%ƚ18<,⺱>mgS[:\/!YT.u#d:Zbrl^Vbr^v:fB3VbE=Dy%m780@5:}bOGT+ҟo&Va(/F#:Q{|5PS9%,ϢϏWɽ?i5)Y9\4O+*XK敥3;: C}1CR%&;f}e@R'}h/m^Tb,n%X'0 %hzr6,8&u9Hgɢ$l&ω=: C}1i'qRdǴ0S] FlĮ muּr;Cs/)n63gkt a؜J<³ſr;CsֽRҹuKݧm%?)br;wo8|#(q6ӏQ5mDEt JܽPr1͊_jssB;ibYR C%%N:Ŀu,-6tn@w:%pFI~bHK!ͭ'.%%+)[@fK_JJc컫伬{'cW⿾w'။nۢkpFĪfό_m+=vTye duhp9/1+Wwǎ}71-JDyѯPOi]4[ջLƜu$`m-9ۖ7ׁ=|1]:;>t~ۢDb)9 z~@F_f*ĚI{uYire̖(/w:3m7}7 ߢ:I帅ʚ0|RVh;@8{Vr=h# du@}19ɭ+F/ ʟUrｼ×ƏT62ondWW:v4}8ey&d#%3r/=nMuiuTb4L=ҙ}O}Ē&/?DrQX+:JU -Om˂J,i>g2a~g>~W%g?yPXeb%._h0a.n>Տ ۉtG8VFhdՋ6De4ÒZD}q: C}1Ǐ~|~Ƨn_M~ۢD>RE/XPL%60 %hz3ۿ'?woD N'qQ9:k}q: C}1_}l>{=Wt~oαxoW_G7 Z6#l! 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.objectmother; /** * Defines all attributes and behaviour related to the King */ public class King implements Royalty { boolean isDrunk = false; boolean isHappy = false; @Override public void makeDrunk() { isDrunk = true; } @Override public void makeSober() { isDrunk = false; } @Override public void makeHappy() { isHappy = true; } @Override public void makeUnhappy() { isHappy = false; } public boolean isHappy() { return isHappy; } /** * Method to flirt to a queen. * @param queen Queen which should be flirted. */ public void flirt(Queen queen) { boolean flirtStatus = queen.getFlirted(this); if (flirtStatus == false) { this.makeUnhappy(); } else { this.makeHappy(); } } } java-design-patterns-1.18.0/object-mother/src/main/java/com/iluwatar/objectmother/Queen.java000066400000000000000000000041431322244523500320440ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.objectmother; /** * Defines all attributes and behaviour related to the Queen */ public class Queen implements Royalty { private boolean isDrunk = false; private boolean isHappy = false; private boolean isFlirty = false; @Override public void makeDrunk() { isDrunk = true; } @Override public void makeSober() { isDrunk = false; } @Override public void makeHappy() { isHappy = true; } @Override public void makeUnhappy() { isHappy = false; } public boolean isFlirty() { return isFlirty; } public void setFlirtiness(boolean flirtiness) { this.isFlirty = flirtiness; } /** * Method which is called when the king is flirting to a queen. * @param king King who initialized the flirt. * @return A value which describes if the flirt was successful or not. */ public boolean getFlirted(King king) { if (this.isFlirty && king.isHappy && !king.isDrunk) { return true; } return false; } } java-design-patterns-1.18.0/object-mother/src/main/java/com/iluwatar/objectmother/Royalty.java000066400000000000000000000024751322244523500324400ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.objectmother; /** * Interface contracting Royalty Behaviour */ public interface Royalty { void makeDrunk(); void makeSober(); void makeHappy(); void makeUnhappy(); } RoyaltyObjectMother.java000066400000000000000000000052331322244523500346620ustar00rootroot00000000000000java-design-patterns-1.18.0/object-mother/src/main/java/com/iluwatar/objectmother/** * The MIT License * Copyright (c) 2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.objectmother; /** * Object Mother Pattern generating Royalty Types */ public final class RoyaltyObjectMother { /** * Method to create a sober and unhappy king. The standard paramters are set. * @return An instance of {@link com.iluwatar.objectmother.King} with the standard properties. */ public static King createSoberUnhappyKing() { return new King(); } /** * Method of the object mother to create a drunk king. * @return A drunk {@link com.iluwatar.objectmother.King}. */ public static King createDrunkKing() { King king = new King(); king.makeDrunk(); return king; } /** * Method to create a happy king. * @return A happy {@link com.iluwatar.objectmother.King}. */ public static King createHappyKing() { King king = new King(); king.makeHappy(); return king; } /** * Method to create a happy and drunk king. * @return A drunk and happy {@link com.iluwatar.objectmother.King}. */ public static King createHappyDrunkKing() { King king = new King(); king.makeHappy(); king.makeDrunk(); return king; } /** * Method to create a flirty queen. * @return A flirty {@link com.iluwatar.objectmother.Queen}. */ public static Queen createFlirtyQueen() { Queen queen = new Queen(); queen.setFlirtiness(true); return queen; } /** * Method to create a not flirty queen. * @return A not flirty {@link com.iluwatar.objectmother.Queen}. */ public static Queen createNotFlirtyQueen() { return new Queen(); } } java-design-patterns-1.18.0/object-mother/src/test/000077500000000000000000000000001322244523500221415ustar00rootroot00000000000000java-design-patterns-1.18.0/object-mother/src/test/java/000077500000000000000000000000001322244523500230625ustar00rootroot00000000000000java-design-patterns-1.18.0/object-mother/src/test/java/com/000077500000000000000000000000001322244523500236405ustar00rootroot00000000000000java-design-patterns-1.18.0/object-mother/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500254705ustar00rootroot00000000000000java-design-patterns-1.18.0/object-mother/src/test/java/com/iluwatar/objectmother/000077500000000000000000000000001322244523500301555ustar00rootroot00000000000000java-design-patterns-1.18.0/object-mother/src/test/java/com/iluwatar/objectmother/test/000077500000000000000000000000001322244523500311345ustar00rootroot00000000000000RoyaltyObjectMotherTest.java000066400000000000000000000070531322244523500365360ustar00rootroot00000000000000java-design-patterns-1.18.0/object-mother/src/test/java/com/iluwatar/objectmother/test/** * The MIT License * Copyright (c) 2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.objectmother.test; import com.iluwatar.objectmother.King; import com.iluwatar.objectmother.Queen; import com.iluwatar.objectmother.Royalty; import com.iluwatar.objectmother.RoyaltyObjectMother; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Test Generation of Royalty Types using the object-mother */ public class RoyaltyObjectMotherTest { @Test public void unsuccessfulKingFlirt() { King soberUnhappyKing = RoyaltyObjectMother.createSoberUnhappyKing(); Queen flirtyQueen = RoyaltyObjectMother.createFlirtyQueen(); soberUnhappyKing.flirt(flirtyQueen); assertFalse(soberUnhappyKing.isHappy()); } @Test public void queenIsBlockingFlirtCauseDrunkKing() { King drunkUnhappyKing = RoyaltyObjectMother.createDrunkKing(); Queen notFlirtyQueen = RoyaltyObjectMother.createNotFlirtyQueen(); drunkUnhappyKing.flirt(notFlirtyQueen); assertFalse(drunkUnhappyKing.isHappy()); } @Test public void queenIsBlockingFlirt() { King soberHappyKing = RoyaltyObjectMother.createHappyKing(); Queen notFlirtyQueen = RoyaltyObjectMother.createNotFlirtyQueen(); soberHappyKing.flirt(notFlirtyQueen); assertFalse(soberHappyKing.isHappy()); } @Test public void successfullKingFlirt() { King soberHappyKing = RoyaltyObjectMother.createHappyKing(); Queen flirtyQueen = RoyaltyObjectMother.createFlirtyQueen(); soberHappyKing.flirt(flirtyQueen); assertTrue(soberHappyKing.isHappy()); } @Test public void testQueenType() { Royalty flirtyQueen = RoyaltyObjectMother.createFlirtyQueen(); Royalty notFlirtyQueen = RoyaltyObjectMother.createNotFlirtyQueen(); assertEquals(flirtyQueen.getClass(), Queen.class); assertEquals(notFlirtyQueen.getClass(), Queen.class); } @Test public void testKingType() { Royalty drunkKing = RoyaltyObjectMother.createDrunkKing(); Royalty happyDrunkKing = RoyaltyObjectMother.createHappyDrunkKing(); Royalty happyKing = RoyaltyObjectMother.createHappyKing(); Royalty soberUnhappyKing = RoyaltyObjectMother.createSoberUnhappyKing(); assertEquals(drunkKing.getClass(), King.class); assertEquals(happyDrunkKing.getClass(), King.class); assertEquals(happyKing.getClass(), King.class); assertEquals(soberUnhappyKing.getClass(), King.class); } } java-design-patterns-1.18.0/object-pool/000077500000000000000000000000001322244523500200465ustar00rootroot00000000000000java-design-patterns-1.18.0/object-pool/README.md000066400000000000000000000012361322244523500213270ustar00rootroot00000000000000--- layout: pattern title: Object Pool folder: object-pool permalink: /patterns/object-pool/ categories: Creational tags: - Java - Difficulty-Beginner - Performance --- ## Intent When objects are expensive to create and they are needed only for short periods of time it is advantageous to utilize the Object Pool pattern. 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'{V6@ڵz3o&-AN4rOڑ9fgyĹi9% .$ mK]\ '6CޒD!<+0GO7;{KTYLQ4!;wh3O4(VyI–׶n;-6$f!MR)r{->;169q3I'6iP%o9nJޒD![8)P 6EGtoҠ_1sWzٸbI>=;ȉ={*r)AH<Odk۷!A겍{ʯ""{|A +b#TyKOFF+߳ O2f,k(!e&Ҡ*@T@HHiPi B AU4 51OـonFڱ"mltv8)3"AZU i.cH,6Fe[wl~Ll571W Z"AZUiGf.r>y<?~dEJ0wV,FF A Ңf mH7Hkv S3G98;h_<6FӐon%|Ow^4j5X iV?h@mv1G6U?MsV@㣡͈iV1ODLcv`Wy4OD8raܴ&'"!lqO+iVaO?ebyʲЕǡ)\ *Y8imHiPi B AU4 % @ʼng &\Y! 4B 7awIENDB`java-design-patterns-1.18.0/object-pool/etc/object-pool.ucls000066400000000000000000000054641322244523500237370ustar00rootroot00000000000000 java-design-patterns-1.18.0/object-pool/pom.xml000066400000000000000000000036501322244523500213670ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 object-pool org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/object-pool/src/000077500000000000000000000000001322244523500206355ustar00rootroot00000000000000java-design-patterns-1.18.0/object-pool/src/main/000077500000000000000000000000001322244523500215615ustar00rootroot00000000000000java-design-patterns-1.18.0/object-pool/src/main/java/000077500000000000000000000000001322244523500225025ustar00rootroot00000000000000java-design-patterns-1.18.0/object-pool/src/main/java/com/000077500000000000000000000000001322244523500232605ustar00rootroot00000000000000java-design-patterns-1.18.0/object-pool/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500251105ustar00rootroot00000000000000java-design-patterns-1.18.0/object-pool/src/main/java/com/iluwatar/object/000077500000000000000000000000001322244523500263565ustar00rootroot00000000000000java-design-patterns-1.18.0/object-pool/src/main/java/com/iluwatar/object/pool/000077500000000000000000000000001322244523500273275ustar00rootroot00000000000000java-design-patterns-1.18.0/object-pool/src/main/java/com/iluwatar/object/pool/App.java000066400000000000000000000067271322244523500307260ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.object.pool; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * When it is necessary to work with a large number of objects that are particularly expensive to * instantiate and each object is only needed for a short period of time, the performance of an * entire application may be adversely affected. An object pool design pattern may be deemed * desirable in cases such as these. *

* The object pool design pattern creates a set of objects that may be reused. When a new object is * needed, it is requested from the pool. If a previously prepared object is available it is * returned immediately, avoiding the instantiation cost. If no objects are present in the pool, a * new item is created and returned. When the object has been used and is no longer needed, it is * returned to the pool, allowing it to be used again in the future without repeating the * computationally expensive instantiation process. It is important to note that once an object has * been used and returned, existing references will become invalid. *

* In this example we have created {@link OliphauntPool} inheriting from generic {@link ObjectPool}. * {@link Oliphaunt}s can be checked out from the pool and later returned to it. The pool tracks * created instances and their status (available, inUse). * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args command line args */ public static void main(String[] args) { OliphauntPool pool = new OliphauntPool(); LOGGER.info(pool.toString()); Oliphaunt oliphaunt1 = pool.checkOut(); LOGGER.info("Checked out {}", oliphaunt1); LOGGER.info(pool.toString()); Oliphaunt oliphaunt2 = pool.checkOut(); LOGGER.info("Checked out {}", oliphaunt2); Oliphaunt oliphaunt3 = pool.checkOut(); LOGGER.info("Checked out {}", oliphaunt3); LOGGER.info(pool.toString()); LOGGER.info("Checking in {}", oliphaunt1); pool.checkIn(oliphaunt1); LOGGER.info("Checking in {}", oliphaunt2); pool.checkIn(oliphaunt2); LOGGER.info(pool.toString()); Oliphaunt oliphaunt4 = pool.checkOut(); LOGGER.info("Checked out {}", oliphaunt4); Oliphaunt oliphaunt5 = pool.checkOut(); LOGGER.info("Checked out {}", oliphaunt5); LOGGER.info(pool.toString()); } } java-design-patterns-1.18.0/object-pool/src/main/java/com/iluwatar/object/pool/ObjectPool.java000066400000000000000000000037211322244523500322350ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.object.pool; import java.util.HashSet; import java.util.Set; /** * Generic object pool * @param Type T of Object in the Pool */ public abstract class ObjectPool { private Set available = new HashSet<>(); private Set inUse = new HashSet<>(); protected abstract T create(); /** * Checkout object from pool */ public synchronized T checkOut() { if (available.isEmpty()) { available.add(create()); } T instance = available.iterator().next(); available.remove(instance); inUse.add(instance); return instance; } public synchronized void checkIn(T instance) { inUse.remove(instance); available.add(instance); } @Override public synchronized String toString() { return String.format("Pool available=%d inUse=%d", available.size(), inUse.size()); } } java-design-patterns-1.18.0/object-pool/src/main/java/com/iluwatar/object/pool/Oliphaunt.java000066400000000000000000000031531322244523500321370ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.object.pool; /** * * Oliphaunts are expensive to create * */ public class Oliphaunt { private static int counter = 1; private final int id; /** * Constructor */ public Oliphaunt() { id = counter++; try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } } public int getId() { return id; } @Override public String toString() { return String.format("Oliphaunt id=%d", id); } } java-design-patterns-1.18.0/object-pool/src/main/java/com/iluwatar/object/pool/OliphauntPool.java000066400000000000000000000025171322244523500327740ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.object.pool; /** * * Oliphaunt object pool * */ public class OliphauntPool extends ObjectPool { @Override protected Oliphaunt create() { return new Oliphaunt(); } } java-design-patterns-1.18.0/object-pool/src/test/000077500000000000000000000000001322244523500216145ustar00rootroot00000000000000java-design-patterns-1.18.0/object-pool/src/test/java/000077500000000000000000000000001322244523500225355ustar00rootroot00000000000000java-design-patterns-1.18.0/object-pool/src/test/java/com/000077500000000000000000000000001322244523500233135ustar00rootroot00000000000000java-design-patterns-1.18.0/object-pool/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500251435ustar00rootroot00000000000000java-design-patterns-1.18.0/object-pool/src/test/java/com/iluwatar/object/000077500000000000000000000000001322244523500264115ustar00rootroot00000000000000java-design-patterns-1.18.0/object-pool/src/test/java/com/iluwatar/object/pool/000077500000000000000000000000001322244523500273625ustar00rootroot00000000000000java-design-patterns-1.18.0/object-pool/src/test/java/com/iluwatar/object/pool/AppTest.java000066400000000000000000000025141322244523500316070ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.object.pool; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } OliphauntPoolTest.java000066400000000000000000000116511322244523500336070ustar00rootroot00000000000000java-design-patterns-1.18.0/object-pool/src/test/java/com/iluwatar/object/pool/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.object.pool; import org.junit.jupiter.api.Test; import java.util.Arrays; import java.util.List; import static java.time.Duration.ofMillis; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotSame; import static org.junit.jupiter.api.Assertions.assertSame; import static org.junit.jupiter.api.Assertions.assertTimeout; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Date: 12/27/15 - 1:05 AM * * @author Jeroen Meulemeester */ public class OliphauntPoolTest { /** * Use the same object 100 times subsequently. This should not take much time since the heavy * object instantiation is done only once. Verify if we get the same object each time. */ @Test public void testSubsequentCheckinCheckout() { assertTimeout(ofMillis(5000), () -> { final OliphauntPool pool = new OliphauntPool(); assertEquals(pool.toString(), "Pool available=0 inUse=0"); final Oliphaunt expectedOliphaunt = pool.checkOut(); assertEquals(pool.toString(), "Pool available=0 inUse=1"); pool.checkIn(expectedOliphaunt); assertEquals(pool.toString(), "Pool available=1 inUse=0"); for (int i = 0; i < 100; i++) { final Oliphaunt oliphaunt = pool.checkOut(); assertEquals(pool.toString(), "Pool available=0 inUse=1"); assertSame(expectedOliphaunt, oliphaunt); assertEquals(expectedOliphaunt.getId(), oliphaunt.getId()); assertEquals(expectedOliphaunt.toString(), oliphaunt.toString()); pool.checkIn(oliphaunt); assertEquals(pool.toString(), "Pool available=1 inUse=0"); } }); } /** * Use the same object 100 times subsequently. This should not take much time since the heavy * object instantiation is done only once. Verify if we get the same object each time. */ @Test public void testConcurrentCheckinCheckout() { assertTimeout(ofMillis(5000), () -> { final OliphauntPool pool = new OliphauntPool(); assertEquals(pool.toString(), "Pool available=0 inUse=0"); final Oliphaunt firstOliphaunt = pool.checkOut(); assertEquals(pool.toString(), "Pool available=0 inUse=1"); final Oliphaunt secondOliphaunt = pool.checkOut(); assertEquals(pool.toString(), "Pool available=0 inUse=2"); assertNotSame(firstOliphaunt, secondOliphaunt); assertEquals(firstOliphaunt.getId() + 1, secondOliphaunt.getId()); // After checking in the second, we should get the same when checking out a new oliphaunt ... pool.checkIn(secondOliphaunt); assertEquals(pool.toString(), "Pool available=1 inUse=1"); final Oliphaunt oliphaunt3 = pool.checkOut(); assertEquals(pool.toString(), "Pool available=0 inUse=2"); assertSame(secondOliphaunt, oliphaunt3); // ... and the same applies for the first one pool.checkIn(firstOliphaunt); assertEquals(pool.toString(), "Pool available=1 inUse=1"); final Oliphaunt oliphaunt4 = pool.checkOut(); assertEquals(pool.toString(), "Pool available=0 inUse=2"); assertSame(firstOliphaunt, oliphaunt4); // When both oliphaunt return to the pool, we should still get the same instances pool.checkIn(firstOliphaunt); assertEquals(pool.toString(), "Pool available=1 inUse=1"); pool.checkIn(secondOliphaunt); assertEquals(pool.toString(), "Pool available=2 inUse=0"); // The order of the returned instances is not determined, so just put them in a list // and verify if both expected instances are in there. final List oliphaunts = Arrays.asList(pool.checkOut(), pool.checkOut()); assertEquals(pool.toString(), "Pool available=0 inUse=2"); assertTrue(oliphaunts.contains(firstOliphaunt)); assertTrue(oliphaunts.contains(secondOliphaunt)); }); } }java-design-patterns-1.18.0/observer/000077500000000000000000000000001322244523500174605ustar00rootroot00000000000000java-design-patterns-1.18.0/observer/README.md000066400000000000000000000032571322244523500207460ustar00rootroot00000000000000--- layout: pattern title: Observer folder: observer permalink: /patterns/observer/ categories: Behavioral tags: - Java - Difficulty-Beginner - Gang Of Four - Reactive --- ## Also known as Dependents, Publish-Subscribe ## Intent Define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically. ![alt text](./etc/observer_1.png "Observer") ## Applicability Use the Observer pattern in any of the following situations * when an abstraction has two aspects, one dependent on the other. Encapsulating these aspects in separate objects lets you vary and reuse them independently * when a change to one object requires changing others, and you don't know how many objects need to be changed * when an object should be able to notify other objects without making assumptions about who these objects are. In other words, you don't want these objects tightly coupled ## Typical Use Case * changing in one object leads to a change in other objects ## Real world examples * [java.util.Observer](http://docs.oracle.com/javase/8/docs/api/java/util/Observer.html) * [java.util.EventListener](http://docs.oracle.com/javase/8/docs/api/java/util/EventListener.html) * [javax.servlet.http.HttpSessionBindingListener](http://docs.oracle.com/javaee/7/api/javax/servlet/http/HttpSessionBindingListener.html) * [RxJava](https://github.com/ReactiveX/RxJava) ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) * [Java Generics and Collections](http://www.amazon.com/Java-Generics-Collections-Maurice-Naftalin/dp/0596527756/) java-design-patterns-1.18.0/observer/etc/000077500000000000000000000000001322244523500202335ustar00rootroot00000000000000java-design-patterns-1.18.0/observer/etc/observer.png000066400000000000000000000474031322244523500226000ustar00rootroot00000000000000PNG  IHDRڴNIDATx}\}]Kd?b%RҡX=,!*@QJŽ Z6⌘;'FKuT)Ju*gݥ.Ee^z~o>_Owon x|W i@E,9 !To `%`5 @ŠwAB6 #jA_ z'!h#|10BڭN2StOFa(ac#0hD+pNr,(ac#0hĐAd ~ D?(Fۇ6bNz!, lEH:o(bM ,.7Jjr#SzQ1`0‰7B/bճ H~im4{d<kNϒlTYtFJbR61ߞW0Bsқϐ)")gHLa7C%$hVyB-D v L Wlj0¢q aEӛ̐`t*.Of" #Z5/`J_q}PȿDD_ #z7B/7AI6:[~dNݙ^ڥ1ttҔ1j͚O$b!лz!,?˯a J2Wf7QTZMJ)Ǩ@?¬9L ,sx_ #ω7B/O"CydGŇVc{'8&曛Tvg C!ŗք90 o"[5 _ z'!h#|10BŠwAB6 #jA_ z'!h#|10BŠwA[񃋷<_/~VrMRתI/0 # 0ƂL,rAJr;HSg-*gن{f/M4aGr̄F48>=NXl u~oucxD/Cމ[xhKu# M*nB (l BwrLRD{_HW~!X(Vg!\h<f3# N&Mc]I+n?>&yT2YKA'n{7O]wr$?|kcC(዇c &*[i۝o`k`c@7c5UW8 f<ߑp_XOA[o:qS&U٧~w1|SFy #D$2gymyK'c3ߤEbne( %s)֕_l,08׍ /Ss*[ ykplQ|}tH߼}\|x?7~xi;82Ѭ g'YlȇдSp YKA@t\޳ zv>ֿ;[ܭDSԁr3̷:%,{CUG7u0Ib X.a!R$-wPտo/҅H?ٛN|?$A0/%@ _r # &n/^Q؏SՅ>;~W?e6 mk)wsݯ-{g&~y+Kux@?e L܎0e iy+GG-b━Ioc@WnpF3?>`fA`{ @Z o}~}ߺ[G:\{7wO-*LBo)w55h/D CݺX.apHf6YXUm^ڤ7cZp[5:?tGo:q^/&)]z|0~)e`/60B/WKd|1`5 8nu|65EJ $#s7D5e}qd0,BUo$)-24EDGg6 8) Ry(b9Z_G/gz#6kjmm"v88^{ 0h0񟘿_%u)M Q% L89FAA7Ea) A-t;{ϙo>y䂼|`D ̄4%T.v0h xyH$ ,}G.eFh,GiJpc a ԔR0*bl6[K1 oDY9Vv0h ]ȿ%IY|._SK%:cxH#LDv0PXW#d3q1Ry1Ѵ@pJQ|N0h {'}ec֥Y(d9B.(RfWBFh_Thu2aTY[#\K֝,0׻D/M e\y {wn⎥ G /:$~x|C#|0ۿF',o{ayV(FX=N7$}v7e2V3_ #Ґ`]Xڱm[5/Yx=g/׏ /K$dc|#bS|_7G78wGp ?ZN7J󈻂EEtb ` >}ֵ5ȧA& UXKgo#߱e9 jўa7 ɀ9 )l;*{-'AGw-Ͻxʓ%IT^ (`9I3oI<ܙ/ҿL]9w?-A>|׎$!/I-\PdhَJx$IRڴE955Tm%s=ճ̳@;bqb~a0zw~DCb/({)i[U/M\Ȯ?wO_$e C q#l2HFy~K[N+ڢȕ"ہ6LٖGE0>*FXo#om۰€gQk3{΃m^FaI=֓{2b,ITF *wpws*FXs#kllZdvbU2 [ChPF呛 G-K~U`}P#Zye6G(b䖴8Rٛ^,_ #FX6X(l nM>UV'}fbH#ld灰QX kIb;a X !@A`5 m/FP/j@E, AN[ZA1|( <*L4 "A@M}W(-r`PwAii6{}BA:}[ܭ/`dFTrSo\|wҀ_XmO${w;*dci#un0 $dnnw-ް K'a?m` FHAV.znc@/,`dzw9}'O~\鶳sѽx(@/ P'J׬cP'ϟ+<^w1U&wφxMVl:4׋[niA$D0$ZXC&AGw-Ͻxʓ%IT:+bKi,ɝ'|'tJѤpvO3ξW tY؀HUNNuC}m7LMJRN'45"~a|}#I?B^DpȽu׺Oe=ewjK.бe]KvK}B.?&Ӛ}IK+/R0MO 7-] &KKK0LGv~fn{b $+ ׳pn <8躶䜅BƍّI]+#l\k^Lo:)]+"_'v3hVqBL6/^! {'}ec֥YhjO3L fzL8Nhͦo!?JJμ9Bjh+~iӦK.! w'XpK RciXz N G%?>'OT¥*2VaurmDw.EW&Q^oZnH*$+k¸r*n@/,sɅ&гvõh<)^lZ^@eCpuK"-3I+ul5SrO{!"Kއ@O[osNlhX Bc42 \`5~A0"H ~ A0[ T2! pA0X^^~}8Q NZ]]] @D(BSSS;XCDՅa 'þk4A`4T@vNv@s9MI( H`D`/J -~, Bc!` _tbr0VA`~(y< Ahyf ޽L7Wv]wĜS3 [gwv B  (&&AGw-Ͻxʓ%IKqONϣ=");=z-&۩is'}j A؀- 0 w>>|׎$!/I-^H" 뉅wD9cgE8DKz1tA l~5~aW?3s$Bۗ#ɺUv/׵+is*TA#k]]/@/L`هs珝'[fI([|/t^H]hΩQLăAA,d0Q0 {wn⎥ G /<|W]\H36|D_X$o} A? 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DB"!}-+V@#B B)~@!D_2^:IENDB`java-design-patterns-1.18.0/observer/pom.xml000066400000000000000000000043171322244523500210020ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 observer org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.junit.jupiter junit-jupiter-params test org.mockito mockito-core test java-design-patterns-1.18.0/observer/src/000077500000000000000000000000001322244523500202475ustar00rootroot00000000000000java-design-patterns-1.18.0/observer/src/main/000077500000000000000000000000001322244523500211735ustar00rootroot00000000000000java-design-patterns-1.18.0/observer/src/main/java/000077500000000000000000000000001322244523500221145ustar00rootroot00000000000000java-design-patterns-1.18.0/observer/src/main/java/com/000077500000000000000000000000001322244523500226725ustar00rootroot00000000000000java-design-patterns-1.18.0/observer/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500245225ustar00rootroot00000000000000java-design-patterns-1.18.0/observer/src/main/java/com/iluwatar/observer/000077500000000000000000000000001322244523500263515ustar00rootroot00000000000000java-design-patterns-1.18.0/observer/src/main/java/com/iluwatar/observer/App.java000066400000000000000000000056041322244523500277410ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer; import com.iluwatar.observer.generic.GHobbits; import com.iluwatar.observer.generic.GOrcs; import com.iluwatar.observer.generic.GWeather; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * The Observer pattern is a software design pattern in which an object, called the subject, * maintains a list of its dependents, called observers, and notifies them automatically of any * state changes, usually by calling one of their methods. It is mainly used to implement * distributed event handling systems. The Observer pattern is also a key part in the familiar * model–view–controller (MVC) architectural pattern. The Observer pattern is implemented in * numerous programming libraries and systems, including almost all GUI toolkits. *

* In this example {@link Weather} has a state that can be observed. The {@link Orcs} and * {@link Hobbits} register as observers and receive notifications when the {@link Weather} changes. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args command line args */ public static void main(String[] args) { Weather weather = new Weather(); weather.addObserver(new Orcs()); weather.addObserver(new Hobbits()); weather.timePasses(); weather.timePasses(); weather.timePasses(); weather.timePasses(); // Generic observer inspired by Java Generics and Collection by Naftalin & Wadler LOGGER.info("--Running generic version--"); GWeather gWeather = new GWeather(); gWeather.addObserver(new GOrcs()); gWeather.addObserver(new GHobbits()); gWeather.timePasses(); gWeather.timePasses(); gWeather.timePasses(); gWeather.timePasses(); } } java-design-patterns-1.18.0/observer/src/main/java/com/iluwatar/observer/Hobbits.java000066400000000000000000000036251322244523500306140ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Hobbits * */ public class Hobbits implements WeatherObserver { private static final Logger LOGGER = LoggerFactory.getLogger(Hobbits.class); @Override public void update(WeatherType currentWeather) { switch (currentWeather) { case COLD: LOGGER.info("The hobbits are shivering in the cold weather."); break; case RAINY: LOGGER.info("The hobbits look for cover from the rain."); break; case SUNNY: LOGGER.info("The happy hobbits bade in the warm sun."); break; case WINDY: LOGGER.info("The hobbits hold their hats tightly in the windy weather."); break; default: break; } } } java-design-patterns-1.18.0/observer/src/main/java/com/iluwatar/observer/Orcs.java000066400000000000000000000035211322244523500301230ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Orcs * */ public class Orcs implements WeatherObserver { private static final Logger LOGGER = LoggerFactory.getLogger(Orcs.class); @Override public void update(WeatherType currentWeather) { switch (currentWeather) { case COLD: LOGGER.info("The orcs are freezing cold."); break; case RAINY: LOGGER.info("The orcs are dripping wet."); break; case SUNNY: LOGGER.info("The sun hurts the orcs' eyes."); break; case WINDY: LOGGER.info("The orc smell almost vanishes in the wind."); break; default: break; } } } java-design-patterns-1.18.0/observer/src/main/java/com/iluwatar/observer/Weather.java000066400000000000000000000043611322244523500306170ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.ArrayList; import java.util.List; /** * * Weather can be observed by implementing {@link WeatherObserver} interface and registering as * listener. * */ public class Weather { private static final Logger LOGGER = LoggerFactory.getLogger(Weather.class); private WeatherType currentWeather; private List observers; public Weather() { observers = new ArrayList<>(); currentWeather = WeatherType.SUNNY; } public void addObserver(WeatherObserver obs) { observers.add(obs); } public void removeObserver(WeatherObserver obs) { observers.remove(obs); } /** * Makes time pass for weather */ public void timePasses() { WeatherType[] enumValues = WeatherType.values(); currentWeather = enumValues[(currentWeather.ordinal() + 1) % enumValues.length]; LOGGER.info("The weather changed to {}.", currentWeather); notifyObservers(); } private void notifyObservers() { for (WeatherObserver obs : observers) { obs.update(currentWeather); } } } java-design-patterns-1.18.0/observer/src/main/java/com/iluwatar/observer/WeatherObserver.java000066400000000000000000000024641322244523500323310ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer; /** * * Observer interface. * */ public interface WeatherObserver { void update(WeatherType currentWeather); } java-design-patterns-1.18.0/observer/src/main/java/com/iluwatar/observer/WeatherType.java000066400000000000000000000025221322244523500314560ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer; /** * * WeatherType enumeration * */ public enum WeatherType { SUNNY, RAINY, WINDY, COLD; @Override public String toString() { return this.name().toLowerCase(); } } java-design-patterns-1.18.0/observer/src/main/java/com/iluwatar/observer/generic/000077500000000000000000000000001322244523500277655ustar00rootroot00000000000000java-design-patterns-1.18.0/observer/src/main/java/com/iluwatar/observer/generic/GHobbits.java000066400000000000000000000037131322244523500323350ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer.generic; import com.iluwatar.observer.WeatherType; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * GHobbits * */ public class GHobbits implements Race { private static final Logger LOGGER = LoggerFactory.getLogger(GHobbits.class); @Override public void update(GWeather weather, WeatherType weatherType) { switch (weatherType) { case COLD: LOGGER.info("The hobbits are shivering in the cold weather."); break; case RAINY: LOGGER.info("The hobbits look for cover from the rain."); break; case SUNNY: LOGGER.info("The happy hobbits bade in the warm sun."); break; case WINDY: LOGGER.info("The hobbits hold their hats tightly in the windy weather."); break; default: break; } } } java-design-patterns-1.18.0/observer/src/main/java/com/iluwatar/observer/generic/GOrcs.java000066400000000000000000000036071322244523500316530ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer.generic; import com.iluwatar.observer.WeatherType; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * GOrcs * */ public class GOrcs implements Race { private static final Logger LOGGER = LoggerFactory.getLogger(GOrcs.class); @Override public void update(GWeather weather, WeatherType weatherType) { switch (weatherType) { case COLD: LOGGER.info("The orcs are freezing cold."); break; case RAINY: LOGGER.info("The orcs are dripping wet."); break; case SUNNY: LOGGER.info("The sun hurts the orcs' eyes."); break; case WINDY: LOGGER.info("The orc smell almost vanishes in the wind."); break; default: break; } } } java-design-patterns-1.18.0/observer/src/main/java/com/iluwatar/observer/generic/GWeather.java000066400000000000000000000035421322244523500323420ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer.generic; import com.iluwatar.observer.WeatherType; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * GWeather * */ public class GWeather extends Observable { private static final Logger LOGGER = LoggerFactory.getLogger(GWeather.class); private WeatherType currentWeather; public GWeather() { currentWeather = WeatherType.SUNNY; } /** * Makes time pass for weather */ public void timePasses() { WeatherType[] enumValues = WeatherType.values(); currentWeather = enumValues[(currentWeather.ordinal() + 1) % enumValues.length]; LOGGER.info("The weather changed to {}.", currentWeather); notifyObservers(currentWeather); } } java-design-patterns-1.18.0/observer/src/main/java/com/iluwatar/observer/generic/Observable.java000066400000000000000000000037211322244523500327170ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer.generic; import java.util.List; import java.util.concurrent.CopyOnWriteArrayList; /** * Generic observer inspired by Java Generics and Collection by Naftalin & Wadler * * @param Subject * @param Observer * @param Argument type */ public abstract class Observable, O extends Observer, A> { protected List observers; public Observable() { this.observers = new CopyOnWriteArrayList<>(); } public void addObserver(O observer) { this.observers.add(observer); } public void removeObserver(O observer) { this.observers.remove(observer); } /** * Notify observers */ @SuppressWarnings("unchecked") public void notifyObservers(A argument) { for (O observer : observers) { observer.update((S) this, argument); } } } java-design-patterns-1.18.0/observer/src/main/java/com/iluwatar/observer/generic/Observer.java000066400000000000000000000025761322244523500324310ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer.generic; /** * Observer * @param Observable * @param Observer * @param Action */ public interface Observer, O extends Observer, A> { void update(S subject, A argument); } java-design-patterns-1.18.0/observer/src/main/java/com/iluwatar/observer/generic/Race.java000066400000000000000000000024531322244523500315060ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer.generic; import com.iluwatar.observer.WeatherType; /** * * Race * */ public interface Race extends Observer { } java-design-patterns-1.18.0/observer/src/test/000077500000000000000000000000001322244523500212265ustar00rootroot00000000000000java-design-patterns-1.18.0/observer/src/test/java/000077500000000000000000000000001322244523500221475ustar00rootroot00000000000000java-design-patterns-1.18.0/observer/src/test/java/com/000077500000000000000000000000001322244523500227255ustar00rootroot00000000000000java-design-patterns-1.18.0/observer/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500245555ustar00rootroot00000000000000java-design-patterns-1.18.0/observer/src/test/java/com/iluwatar/observer/000077500000000000000000000000001322244523500264045ustar00rootroot00000000000000java-design-patterns-1.18.0/observer/src/test/java/com/iluwatar/observer/AppTest.java000066400000000000000000000025111322244523500306260ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/observer/src/test/java/com/iluwatar/observer/HobbitsTest.java000066400000000000000000000040151322244523500315010ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer; import java.util.ArrayList; import java.util.Collection; import java.util.List; /** * Date: 12/27/15 - 12:07 PM * * @author Jeroen Meulemeester */ public class HobbitsTest extends WeatherObserverTest { static Collection dataProvider() { final List testData = new ArrayList<>(); testData.add(new Object[]{WeatherType.SUNNY, "The happy hobbits bade in the warm sun."}); testData.add(new Object[]{WeatherType.RAINY, "The hobbits look for cover from the rain."}); testData.add(new Object[]{WeatherType.WINDY, "The hobbits hold their hats tightly in the windy weather."}); testData.add(new Object[]{WeatherType.COLD, "The hobbits are shivering in the cold weather."}); return testData; } /** * Create a new test with the given weather and expected response */ public HobbitsTest() { super(Hobbits::new); } } java-design-patterns-1.18.0/observer/src/test/java/com/iluwatar/observer/OrcsTest.java000066400000000000000000000037061322244523500310230ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer; import java.util.ArrayList; import java.util.Collection; import java.util.List; /** * Date: 12/27/15 - 12:07 PM * * @author Jeroen Meulemeester */ public class OrcsTest extends WeatherObserverTest { static Collection dataProvider() { final List testData = new ArrayList<>(); testData.add(new Object[]{WeatherType.SUNNY, "The sun hurts the orcs' eyes."}); testData.add(new Object[]{WeatherType.RAINY, "The orcs are dripping wet."}); testData.add(new Object[]{WeatherType.WINDY, "The orc smell almost vanishes in the wind."}); testData.add(new Object[]{WeatherType.COLD, "The orcs are freezing cold."}); return testData; } /** * Create a new test with the given weather and expected response */ public OrcsTest() { super(Orcs::new); } } java-design-patterns-1.18.0/observer/src/test/java/com/iluwatar/observer/WeatherObserverTest.java000066400000000000000000000052151322244523500332210ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer; import com.iluwatar.observer.utils.InMemoryAppender; import java.util.function.Supplier; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Disabled; import org.junit.jupiter.params.ParameterizedTest; import org.junit.jupiter.params.provider.MethodSource; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Date: 12/27/15 - 11:44 AM * Weather Observer Tests * @param Type of WeatherObserver * @author Jeroen Meulemeester */ public abstract class WeatherObserverTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(); } @AfterEach public void tearDown() { appender.stop(); } /** * The observer instance factory */ private final Supplier factory; /** * Create a new test instance using the given parameters * * @param factory The factory, used to create an instance of the tested observer */ WeatherObserverTest(final Supplier factory) { this.factory = factory; } /** * Verify if the weather has the expected influence on the observer */ @ParameterizedTest @MethodSource("dataProvider") public void testObserver(WeatherType weather, String response) { final O observer = this.factory.get(); assertEquals(0, appender.getLogSize()); observer.update(weather); assertEquals(response, appender.getLastMessage()); assertEquals(1, appender.getLogSize()); } } java-design-patterns-1.18.0/observer/src/test/java/com/iluwatar/observer/WeatherTest.java000066400000000000000000000064231322244523500315130ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer; import com.iluwatar.observer.utils.InMemoryAppender; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.mockito.InOrder; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.mockito.Mockito.inOrder; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/27/15 - 11:08 AM * * @author Jeroen Meulemeester */ public class WeatherTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(Weather.class); } @AfterEach public void tearDown() { appender.stop(); } /** * Add a {@link WeatherObserver}, verify if it gets notified of a weather change, remove the * observer again and verify that there are no more notifications. */ @Test public void testAddRemoveObserver() { final WeatherObserver observer = mock(WeatherObserver.class); final Weather weather = new Weather(); weather.addObserver(observer); verifyZeroInteractions(observer); weather.timePasses(); assertEquals("The weather changed to rainy.", appender.getLastMessage()); verify(observer).update(WeatherType.RAINY); weather.removeObserver(observer); weather.timePasses(); assertEquals("The weather changed to windy.", appender.getLastMessage()); verifyNoMoreInteractions(observer); assertEquals(2, appender.getLogSize()); } /** * Verify if the weather passes in the order of the {@link WeatherType}s */ @Test public void testTimePasses() { final WeatherObserver observer = mock(WeatherObserver.class); final Weather weather = new Weather(); weather.addObserver(observer); final InOrder inOrder = inOrder(observer); final WeatherType[] weatherTypes = WeatherType.values(); for (int i = 1; i < 20; i++) { weather.timePasses(); inOrder.verify(observer).update(weatherTypes[i % weatherTypes.length]); } verifyNoMoreInteractions(observer); } } java-design-patterns-1.18.0/observer/src/test/java/com/iluwatar/observer/generic/000077500000000000000000000000001322244523500300205ustar00rootroot00000000000000java-design-patterns-1.18.0/observer/src/test/java/com/iluwatar/observer/generic/GHobbitsTest.java000066400000000000000000000040751322244523500332320ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer.generic; import com.iluwatar.observer.WeatherType; import java.util.ArrayList; import java.util.Collection; import java.util.List; /** * Date: 12/27/15 - 12:07 PM * * @author Jeroen Meulemeester */ public class GHobbitsTest extends ObserverTest { static Collection dataProvider() { final List testData = new ArrayList<>(); testData.add(new Object[]{WeatherType.SUNNY, "The happy hobbits bade in the warm sun."}); testData.add(new Object[]{WeatherType.RAINY, "The hobbits look for cover from the rain."}); testData.add(new Object[]{WeatherType.WINDY, "The hobbits hold their hats tightly in the windy weather."}); testData.add(new Object[]{WeatherType.COLD, "The hobbits are shivering in the cold weather."}); return testData; } /** * Create a new test with the given weather and expected response */ public GHobbitsTest() { super(GHobbits::new); } } java-design-patterns-1.18.0/observer/src/test/java/com/iluwatar/observer/generic/GWeatherTest.java000066400000000000000000000062211322244523500332320ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer.generic; import com.iluwatar.observer.WeatherObserver; import com.iluwatar.observer.WeatherType; import com.iluwatar.observer.utils.InMemoryAppender; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.mockito.InOrder; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.mockito.Mockito.*; /** * Date: 12/27/15 - 11:08 AM * * @author Jeroen Meulemeester */ public class GWeatherTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(GWeather.class); } @AfterEach public void tearDown() { appender.stop(); } /** * Add a {@link WeatherObserver}, verify if it gets notified of a weather change, remove the * observer again and verify that there are no more notifications. */ @Test public void testAddRemoveObserver() { final Race observer = mock(Race.class); final GWeather weather = new GWeather(); weather.addObserver(observer); verifyZeroInteractions(observer); weather.timePasses(); assertEquals("The weather changed to rainy.", appender.getLastMessage()); verify(observer).update(weather, WeatherType.RAINY); weather.removeObserver(observer); weather.timePasses(); assertEquals("The weather changed to windy.", appender.getLastMessage()); verifyNoMoreInteractions(observer); assertEquals(2, appender.getLogSize()); } /** * Verify if the weather passes in the order of the {@link WeatherType}s */ @Test public void testTimePasses() { final Race observer = mock(Race.class); final GWeather weather = new GWeather(); weather.addObserver(observer); final InOrder inOrder = inOrder(observer); final WeatherType[] weatherTypes = WeatherType.values(); for (int i = 1; i < 20; i++) { weather.timePasses(); inOrder.verify(observer).update(weather, weatherTypes[i % weatherTypes.length]); } verifyNoMoreInteractions(observer); } } java-design-patterns-1.18.0/observer/src/test/java/com/iluwatar/observer/generic/ObserverTest.java000066400000000000000000000051761322244523500333230ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer.generic; import com.iluwatar.observer.WeatherType; import com.iluwatar.observer.utils.InMemoryAppender; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.params.ParameterizedTest; import org.junit.jupiter.params.provider.MethodSource; import java.util.function.Supplier; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Date: 12/27/15 - 11:44 AM * Test for Observers * @param Type of Observer * @author Jeroen Meulemeester */ public abstract class ObserverTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(); } @AfterEach public void tearDown() { appender.stop(); } /** * The observer instance factory */ private final Supplier factory; /** * Create a new test instance using the given parameters * * @param factory The factory, used to create an instance of the tested observer */ ObserverTest(final Supplier factory) { this.factory = factory; } /** * Verify if the weather has the expected influence on the observer */ @ParameterizedTest @MethodSource("dataProvider") public void testObserver(WeatherType weather, String response) { final O observer = this.factory.get(); assertEquals(0, appender.getLogSize()); observer.update(null, weather); assertEquals(response, appender.getLastMessage()); assertEquals(1, appender.getLogSize()); } } java-design-patterns-1.18.0/observer/src/test/java/com/iluwatar/observer/generic/OrcsTest.java000066400000000000000000000037641322244523500324430ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer.generic; import com.iluwatar.observer.WeatherType; import java.util.ArrayList; import java.util.Collection; import java.util.List; /** * Date: 12/27/15 - 12:07 PM * * @author Jeroen Meulemeester */ public class OrcsTest extends ObserverTest { static Collection dataProvider() { final List testData = new ArrayList<>(); testData.add(new Object[]{WeatherType.SUNNY, "The sun hurts the orcs' eyes."}); testData.add(new Object[]{WeatherType.RAINY, "The orcs are dripping wet."}); testData.add(new Object[]{WeatherType.WINDY, "The orc smell almost vanishes in the wind."}); testData.add(new Object[]{WeatherType.COLD, "The orcs are freezing cold."}); return testData; } /** * Create a new test with the given weather and expected response */ public OrcsTest() { super(GOrcs::new); } } java-design-patterns-1.18.0/observer/src/test/java/com/iluwatar/observer/utils/000077500000000000000000000000001322244523500275445ustar00rootroot00000000000000java-design-patterns-1.18.0/observer/src/test/java/com/iluwatar/observer/utils/InMemoryAppender.java000066400000000000000000000040021322244523500336210ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.observer.utils; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import org.slf4j.LoggerFactory; import java.util.LinkedList; import java.util.List; /** * InMemory Log Appender Util. */ public class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender(Class clazz) { ((Logger) LoggerFactory.getLogger(clazz)).addAppender(this); start(); } public InMemoryAppender() { ((Logger) LoggerFactory.getLogger("root")).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public int getLogSize() { return log.size(); } public String getLastMessage() { return log.get(log.size() - 1).getFormattedMessage(); } } java-design-patterns-1.18.0/page-object/000077500000000000000000000000001322244523500200115ustar00rootroot00000000000000java-design-patterns-1.18.0/page-object/README.md000066400000000000000000000017051322244523500212730ustar00rootroot00000000000000--- layout: pattern title: Page Object folder: page-object permalink: /patterns/page-object/ categories: Testing tags: - Java - Difficulty-Intermediate --- ## Intent Page Object encapsulates the UI, hiding the underlying UI widgetry of an application (commonly a web application) and providing an application-specific API to allow the manipulation of UI components required for tests. In doing so, it allows the test class itself to focus on the test logic instead. ![alt text](./etc/page-object.png "Page Object") ## Applicability Use the Page Object pattern when * You are writing automated tests for your web application and you want to separate the UI manipulation required for the tests from the actual test logic. * Make your tests less brittle, and more readable and robust ## Credits * [Martin Fowler - PageObject](http://martinfowler.com/bliki/PageObject.html) * [Selenium - Page Objects](https://github.com/SeleniumHQ/selenium/wiki/PageObjects) java-design-patterns-1.18.0/page-object/etc/000077500000000000000000000000001322244523500205645ustar00rootroot00000000000000java-design-patterns-1.18.0/page-object/etc/page-object.png000066400000000000000000001410401322244523500234520ustar00rootroot00000000000000PNG  IHDRZIDATx \ JE=R"lJr Z\rKZJhv]Z,H.Ξ=s:N3;̼3<ΜL9 QN$07(`n)_ T M#tQH4@ F`n4F07>`\bDTٳsq47O^ߒZa~~zhPGGk+oޜu |KJ07>)KswfE+,qs3hۓ'TIm5fLII7Si>XYH٘K֩c~NJs3FOr=rd!77mȐ.zf#P#!*07AHirGW^Lɍq *f۸pa x{]f-?m)9ymM}̍55m[kv޼_CуvvvMA% Hi={iiUXbwWMVVի;$/]:ϟ'TZɓD8#i^}+JHXu*In 'کpŕ07#eË۴qr儗/STʘ3j0vAmwMV׷ya͘~i6jϻ͍5坙6miUCCQ>#7ïfyZvmBn% H=P|TTN-ML O^/rݺ)[̤{*VMQ-I5ٲ{ukq͘޾MNMjMrrR8s#w ɓD[ۚQQ!3g6Pi/ )xq+J,'7nV/Y2[;+~~Dm,,Lɠ<ի'Ըt)9'' J]CttOϦޝʎP2[ s @QssRqW n9*S' sC vEN + @}pymcB0QYm7oߦ1 2  FTܐq1:y)ARYdL9)̌K|GJ[07>QqssRzy=Ƈ$8.s7S}zNMomf}٧4Iߗ  FT0vḦYordyr+%ްH{vm کwa۷ѤOXI.ԴjV -m%55׷Uվ+\\Of]Gv4lѢQ@Ĉ=DB]L4hao,)x?QFl7✝&,lد뚙YZR?PAժkkW׋֫gK,f]kddS=y @y0.1쮍fz/M~ gx5 M:mѽIXgѣh>{솬LVVvK~͙3/G==n;9vl9MzyQy׮9T>}z=iA @y0.1{i@CSW}Av{s`ߍ:.Kmg=bwh4hPz߿f=}z,2rT͛;hSo]Bگ_R9/LŊZ4'PBɓL6hҤϹTS07>Qqs3tkHGfzN=K;-Iz#٫G\3]a\.]Z}}}+9##*?|xɓ_cbm܉gwz|zUoٲ>'Y  FTܜn?]CƇxt'V]Ds ̈ˬ}؅ʿ=mWW_Y]TprsrR?&07ĈRX²_{{/38拯T.mNw˵$OCcll_ի;hՒ%c#5biY=zP/_#Êsq  F`n4F07>`\bFcsq  FJŅOyllǼٳ+V+9;$d?  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A fmmQa> 3tz7ǎmCj߳6`l;\~劂;0\pODjR Qe_2.H;;K81/^PqkkK ֡|Eed,ٳ 0E^n#-&({„;we~Ztcn LHi^9 zȜrJVǠѝ;~!!>[Ds:qnXqƭp>ܴoołońWW++37uA?nH$Z$1JtZ4M 'E/.ر͛㨑(@}xu~?{vV RQ5Tdaa Laq"{gϾ\ZM&g `_p,@wJȐ!XvFxʪÇ\nn'5UU%&OK~=RR%b4W8_ݽg`0WWGozg #S6#!h ĨO*+ 23WFp KJTU) 1e0I ܐnH$Z$1̀D5@n nH$Z$1̀D5@n nH$Z$1 PͽHfD"H%D"H%D"HNJh19@IENDB`java-design-patterns-1.18.0/page-object/etc/page-object.ucls000066400000000000000000000013011322244523500236270ustar00rootroot00000000000000 java-design-patterns-1.18.0/page-object/pom.xml000066400000000000000000000042071322244523500213310ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 page-object org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test net.sourceforge.htmlunit htmlunit java-design-patterns-1.18.0/page-object/src/000077500000000000000000000000001322244523500206005ustar00rootroot00000000000000java-design-patterns-1.18.0/page-object/src/main/000077500000000000000000000000001322244523500215245ustar00rootroot00000000000000java-design-patterns-1.18.0/page-object/src/main/java/000077500000000000000000000000001322244523500224455ustar00rootroot00000000000000java-design-patterns-1.18.0/page-object/src/main/java/com/000077500000000000000000000000001322244523500232235ustar00rootroot00000000000000java-design-patterns-1.18.0/page-object/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500250535ustar00rootroot00000000000000java-design-patterns-1.18.0/page-object/src/main/java/com/iluwatar/pageobject/000077500000000000000000000000001322244523500271565ustar00rootroot00000000000000java-design-patterns-1.18.0/page-object/src/main/java/com/iluwatar/pageobject/App.java000066400000000000000000000074501322244523500305470ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.pageobject; import java.awt.Desktop; import java.io.File; import java.io.IOException; /** * Page Object pattern wraps an UI component with an application specific API allowing you to * manipulate the UI elements without having to dig around with the underlying UI technology used. This is * especially useful for testing as it means your tests will be less brittle. Your tests can concentrate on * the actual test cases where as the manipulation of the UI can be left to the internals of the page object * itself. * *

* Due to this reason, it has become very popular within the test automation community. * In particular, it is very common in that the page object is used to represent the html pages of a * web application that is under test. This web application is referred to as AUT (Application Under Test). * A web browser automation tool/framework like Selenium for instance, is then used to drive the automating * of the browser navigation and user actions journeys through this web application. Your test class would * therefore only be responsible for particular test cases and page object would be used by the test class * for UI manipulation required for the tests. * *

* In this implementation rather than using Selenium, the HtmlUnit library is used as a replacement to * represent the specific html elements and to drive the browser. The purpose of this example is just to * provide a simple version that showcase the intentions of this pattern and how this pattern is used * in order to understand it. */ public final class App { private App() { } /** * Application entry point * *

* The application under development is a web application. Normally you would probably have a * backend that is probably implemented in an object-oriented language (e.g. Java) that serves * the frontend which comprises of a series of HTML, CSS, JS etc... * *

* For illustrations purposes only, a very simple static html app is used here. This main method * just fires up this simple web app in a default browser. * * @param args arguments */ public static void main(String[] args) { try { File applicationFile = new File(App.class.getClassLoader().getResource("sample-ui/login.html").getPath()); // should work for unix like OS (mac, unix etc...) if (Desktop.isDesktopSupported()) { Desktop.getDesktop().open(applicationFile); } else { // java Desktop not supported - above unlikely to work for Windows so try following instead... Runtime.getRuntime().exec("cmd.exe start " + applicationFile); } } catch (IOException ex) { ex.printStackTrace(); } } } java-design-patterns-1.18.0/page-object/src/main/resources/000077500000000000000000000000001322244523500235365ustar00rootroot00000000000000java-design-patterns-1.18.0/page-object/src/main/resources/sample-ui/000077500000000000000000000000001322244523500254325ustar00rootroot00000000000000java-design-patterns-1.18.0/page-object/src/main/resources/sample-ui/album-list.html000066400000000000000000000037041322244523500303750ustar00rootroot00000000000000 Album List

My Album Viewer

Album Title Album Year Album Rating Number of Songs Artist
21 2011 A 11 Adele
java-design-patterns-1.18.0/page-object/src/main/resources/sample-ui/album-page.html000066400000000000000000000055101322244523500303330ustar00rootroot00000000000000 Album Page

21

Title:
Artist:
Year:
Rating:
Number of Songs:
java-design-patterns-1.18.0/page-object/src/main/resources/sample-ui/css/000077500000000000000000000000001322244523500262225ustar00rootroot00000000000000java-design-patterns-1.18.0/page-object/src/main/resources/sample-ui/css/album-list.css000066400000000000000000000050561322244523500310130ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ table { font-size: 16px; border-collapse: collapse; } th { background-color: #FFFFFF; border: 1px solid black; color: black; width: 150px; height: 20px; } td { border: 1px solid black; background-color: white; } th, td { padding: 15px; text-align: left; }java-design-patterns-1.18.0/page-object/src/main/resources/sample-ui/css/style.css000066400000000000000000000045071322244523500301020ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ body { font-family: "Trebuchet MS", Arial, Helvetica, sans-serif; }java-design-patterns-1.18.0/page-object/src/main/resources/sample-ui/login.html000066400000000000000000000033111322244523500274260ustar00rootroot00000000000000 Login

Login

Username:
Password:
java-design-patterns-1.18.0/page-object/src/test/000077500000000000000000000000001322244523500215575ustar00rootroot00000000000000java-design-patterns-1.18.0/page-object/src/test/java/000077500000000000000000000000001322244523500225005ustar00rootroot00000000000000java-design-patterns-1.18.0/page-object/src/test/java/com/000077500000000000000000000000001322244523500232565ustar00rootroot00000000000000java-design-patterns-1.18.0/page-object/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500251065ustar00rootroot00000000000000java-design-patterns-1.18.0/page-object/src/test/java/com/iluwatar/pageobject/000077500000000000000000000000001322244523500272115ustar00rootroot00000000000000java-design-patterns-1.18.0/page-object/src/test/java/com/iluwatar/pageobject/AlbumListPageTest.java000066400000000000000000000035421322244523500334110ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.pageobject; import com.gargoylesoftware.htmlunit.WebClient; import com.iluwatar.pageobject.pages.AlbumListPage; import com.iluwatar.pageobject.pages.AlbumPage; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Test Album Selection and Album Listing */ public class AlbumListPageTest { private AlbumListPage albumListPage = new AlbumListPage(new WebClient()); @BeforeEach public void setUp() { albumListPage.navigateToPage(); } @Test public void testSelectAlbum() { AlbumPage albumPage = albumListPage.selectAlbum("21"); albumPage.navigateToPage(); assertTrue(albumPage.isAt()); } } java-design-patterns-1.18.0/page-object/src/test/java/com/iluwatar/pageobject/AlbumPageTest.java000066400000000000000000000042461322244523500325570ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.pageobject; import com.gargoylesoftware.htmlunit.WebClient; import com.iluwatar.pageobject.pages.AlbumListPage; import com.iluwatar.pageobject.pages.AlbumPage; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Test Album Page Operations */ public class AlbumPageTest { private AlbumPage albumPage = new AlbumPage(new WebClient()); @BeforeEach public void setUp() { albumPage.navigateToPage(); } @Test public void testSaveAlbum() { AlbumPage albumPageAfterChanges = albumPage .changeAlbumTitle("25") .changeArtist("Adele Laurie Blue Adkins") .changeAlbumYear(2015) .changeAlbumRating("B") .changeNumberOfSongs(20) .saveChanges(); assertTrue(albumPageAfterChanges.isAt()); } @Test public void testCancelChanges() { AlbumListPage albumListPage = albumPage.cancelChanges(); albumListPage.navigateToPage(); assertTrue(albumListPage.isAt()); } } java-design-patterns-1.18.0/page-object/src/test/java/com/iluwatar/pageobject/LoginPageTest.java000066400000000000000000000036061322244523500325660ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.pageobject; import com.gargoylesoftware.htmlunit.WebClient; import com.iluwatar.pageobject.pages.AlbumListPage; import com.iluwatar.pageobject.pages.LoginPage; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Test Login Page Object */ public class LoginPageTest { private LoginPage loginPage = new LoginPage(new WebClient()); @BeforeEach public void setUp() { loginPage.navigateToPage(); } @Test public void testLogin() { AlbumListPage albumListPage = loginPage .enterUsername("admin") .enterPassword("password") .login(); albumListPage.navigateToPage(); assertTrue(albumListPage.isAt()); } } java-design-patterns-1.18.0/page-object/src/test/java/com/iluwatar/pageobject/pages/000077500000000000000000000000001322244523500303105ustar00rootroot00000000000000AlbumListPage.java000066400000000000000000000056071322244523500335750ustar00rootroot00000000000000java-design-patterns-1.18.0/page-object/src/test/java/com/iluwatar/pageobject/pages/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.pageobject.pages; import com.gargoylesoftware.htmlunit.WebClient; import com.gargoylesoftware.htmlunit.html.HtmlAnchor; import com.gargoylesoftware.htmlunit.html.HtmlPage; import java.io.IOException; import java.util.List; /** * Page Object encapsulating the Album List page (album-list.html) */ public class AlbumListPage extends Page { private static final String ALBUM_LIST_HTML_FILE = "album-list.html"; private static final String PAGE_URL = "file:" + AUT_PATH + ALBUM_LIST_HTML_FILE; private HtmlPage page; /** * Constructor */ public AlbumListPage(WebClient webClient) { super(webClient); } /** * Navigates to the Album List Page * * @return {@link AlbumListPage} */ public AlbumListPage navigateToPage() { try { page = this.webClient.getPage(PAGE_URL); } catch (IOException e) { e.printStackTrace(); } return this; } /** * {@inheritDoc} */ @Override public boolean isAt() { return "Album List".equals(page.getTitleText()); } /** * Selects an album by the given album title * * @param albumTitle the title of the album to click * @return the album page */ public AlbumPage selectAlbum(String albumTitle) { // uses XPath to find list of html anchor tags with the class album in it List albumLinks = (List) page.getByXPath("//tr[@class='album']//a"); for (HtmlAnchor anchor : albumLinks) { if (anchor.getTextContent().equals(albumTitle)) { try { anchor.click(); return new AlbumPage(webClient); } catch (IOException e) { e.printStackTrace(); } } } throw new IllegalArgumentException("No links with the album title: " + albumTitle); } } java-design-patterns-1.18.0/page-object/src/test/java/com/iluwatar/pageobject/pages/AlbumPage.java000066400000000000000000000117661322244523500330230ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.pageobject.pages; import com.gargoylesoftware.htmlunit.WebClient; import com.gargoylesoftware.htmlunit.html.HtmlNumberInput; import com.gargoylesoftware.htmlunit.html.HtmlOption; import com.gargoylesoftware.htmlunit.html.HtmlPage; import com.gargoylesoftware.htmlunit.html.HtmlSelect; import com.gargoylesoftware.htmlunit.html.HtmlSubmitInput; import com.gargoylesoftware.htmlunit.html.HtmlTextInput; import java.io.IOException; /** * Page Object encapsulating the Album Page (album-page.html) */ public class AlbumPage extends Page { private static final String ALBUM_PAGE_HTML_FILE = "album-page.html"; private static final String PAGE_URL = "file:" + AUT_PATH + ALBUM_PAGE_HTML_FILE; private HtmlPage page; /** * Constructor */ public AlbumPage(WebClient webClient) { super(webClient); } /** * Navigates to the album page * * @return {@link AlbumPage} */ public AlbumPage navigateToPage() { try { page = this.webClient.getPage(PAGE_URL); } catch (IOException e) { e.printStackTrace(); } return this; } /** * {@inheritDoc} */ @Override public boolean isAt() { return "Album Page".equals(page.getTitleText()); } /** * Sets the album title input text field * * @param albumTitle the new album title value to set * @return {@link AlbumPage} */ public AlbumPage changeAlbumTitle(String albumTitle) { HtmlTextInput albumTitleInputTextField = (HtmlTextInput) page.getElementById("albumTitle"); albumTitleInputTextField.setText(albumTitle); return this; } /** * Sets the artist input text field * * @param artist the new artist value to set * @return {@link AlbumPage} */ public AlbumPage changeArtist(String artist) { HtmlTextInput artistInputTextField = (HtmlTextInput) page.getElementById("albumArtist"); artistInputTextField.setText(artist); return this; } /** * Selects the select's option value based on the year value given * * @param year the new year value to set * @return {@link AlbumPage} */ public AlbumPage changeAlbumYear(int year) { HtmlSelect albumYearSelectOption = (HtmlSelect) page.getElementById("albumYear"); HtmlOption yearOption = albumYearSelectOption.getOptionByValue(Integer.toString(year)); albumYearSelectOption.setSelectedAttribute(yearOption, true); return this; } /** * Sets the album rating input text field * * @param albumRating the new album rating value to set * @return {@link AlbumPage} */ public AlbumPage changeAlbumRating(String albumRating) { HtmlTextInput albumRatingInputTextField = (HtmlTextInput) page.getElementById("albumRating"); albumRatingInputTextField.setText(albumRating); return this; } /** * Sets the number of songs number input field * * @param numberOfSongs the new number of songs value to be set * @return {@link AlbumPage} */ public AlbumPage changeNumberOfSongs(int numberOfSongs) { HtmlNumberInput numberOfSongsNumberField = (HtmlNumberInput) page.getElementById("numberOfSongs"); numberOfSongsNumberField.setText(Integer.toString(numberOfSongs)); return this; } /** * Cancel changes made by clicking the cancel button * * @return {@link AlbumListPage} */ public AlbumListPage cancelChanges() { HtmlSubmitInput cancelButton = (HtmlSubmitInput) page.getElementById("cancelButton"); try { cancelButton.click(); } catch (IOException e) { e.printStackTrace(); } return new AlbumListPage(webClient); } /** * Saves changes made by clicking the save button * * @return {@link AlbumPage} */ public AlbumPage saveChanges() { HtmlSubmitInput saveButton = (HtmlSubmitInput) page.getElementById("saveButton"); try { saveButton.click(); } catch (IOException e) { e.printStackTrace(); } return this; } } java-design-patterns-1.18.0/page-object/src/test/java/com/iluwatar/pageobject/pages/LoginPage.java000066400000000000000000000066711322244523500330320ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.pageobject.pages; import com.gargoylesoftware.htmlunit.WebClient; import com.gargoylesoftware.htmlunit.html.HtmlPage; import com.gargoylesoftware.htmlunit.html.HtmlPasswordInput; import com.gargoylesoftware.htmlunit.html.HtmlSubmitInput; import com.gargoylesoftware.htmlunit.html.HtmlTextInput; import java.io.IOException; /** * Page Object encapsulating the Login Page (login.html) */ public class LoginPage extends Page { private static final String LOGIN_PAGE_HTML_FILE = "login.html"; private static final String PAGE_URL = "file:" + AUT_PATH + LOGIN_PAGE_HTML_FILE; private HtmlPage page; /** * Constructor * * @param webClient {@link WebClient} */ public LoginPage(WebClient webClient) { super(webClient); } /** * Navigates to the Login page * * @return {@link LoginPage} */ public LoginPage navigateToPage() { try { page = this.webClient.getPage(PAGE_URL); } catch (IOException e) { e.printStackTrace(); } return this; } /** * {@inheritDoc} */ @Override public boolean isAt() { return "Login".equals(page.getTitleText()); } /** * Enters the username into the username input text field * * @param username the username to enter * @return {@link LoginPage} */ public LoginPage enterUsername(String username) { HtmlTextInput usernameInputTextField = (HtmlTextInput) page.getElementById("username"); usernameInputTextField.setText(username); return this; } /** * Enters the password into the password input password field * * @param password the password to enter * @return {@link LoginPage} */ public LoginPage enterPassword(String password) { HtmlPasswordInput passwordInputPasswordField = (HtmlPasswordInput) page.getElementById("password"); passwordInputPasswordField.setText(password); return this; } /** * Clicking on the login button to 'login' * * @return {@link AlbumListPage} * - this is the page that user gets navigated to once successfully logged in */ public AlbumListPage login() { HtmlSubmitInput loginButton = (HtmlSubmitInput) page.getElementById("loginButton"); try { loginButton.click(); } catch (IOException e) { e.printStackTrace(); } return new AlbumListPage(webClient); } } java-design-patterns-1.18.0/page-object/src/test/java/com/iluwatar/pageobject/pages/Page.java000066400000000000000000000035211322244523500320300ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä *

* Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: *

* The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.pageobject.pages; import com.gargoylesoftware.htmlunit.WebClient; /** * Encapsulation for a generic 'Page' */ public abstract class Page { /** * Application Under Test path * This directory location is where html web pages are located */ public static final String AUT_PATH = "src/main/resources/sample-ui/"; protected final WebClient webClient; /** * Constructor * * @param webClient {@link WebClient} */ public Page(WebClient webClient) { this.webClient = webClient; } /** * Checks that the current page is actually the page this page object represents * * @return true if so, otherwise false */ public abstract boolean isAt(); } java-design-patterns-1.18.0/partial-response/000077500000000000000000000000001322244523500211215ustar00rootroot00000000000000java-design-patterns-1.18.0/partial-response/README.md000066400000000000000000000014031322244523500223760ustar00rootroot00000000000000--- layout: pattern title: Partial Response folder: partial-response permalink: /patterns/partial-response/ categories: Architectural tags: - Java - KISS - YAGNI - Difficulty-Beginner --- ## Intent Send partial response from server to client on need basis. Client will specify the the fields that it need to server, instead of serving all details for resource. ![alt text](./etc/partial-response.urm.png "partial-response") ## Applicability Use the Partial Response pattern when * Client need only subset of data from resource. * To avoid too much data transfer over wire ## Credits * [Common Design Patterns](https://cloud.google.com/apis/design/design_patterns) * [Partial Response in RESTful API Design](http://yaoganglian.com/2013/07/01/partial-response/) java-design-patterns-1.18.0/partial-response/etc/000077500000000000000000000000001322244523500216745ustar00rootroot00000000000000java-design-patterns-1.18.0/partial-response/etc/partial-response.ucls000066400000000000000000000101711322244523500260540ustar00rootroot00000000000000 java-design-patterns-1.18.0/partial-response/etc/partial-response.urm.png000066400000000000000000000662051322244523500265050ustar00rootroot00000000000000PNG  IHDRs~O)tEXtcopyleftGenerated by http://plantuml.com09!zTXtplantumlxSak0n8ɦvHfni5$m1TْledIc {҆)SىSKbxVf B9B 35p̒bɊU ׫R4Q\'(!=}HJ*LLN^𦰑j;yc>ė*/ EEW:nUs1vt Ej~v 7Y;&[~.~;u'78 (#\fe-dZ _Z{Ɯq2uv|Z*忰m&eOUU/67$_a<ӭYzKӠ%{Zy\.`J[ z7pR@0臣a8,9~;ބkTZyΜmJax!/aA4m.a*\IʝzYWiB*CW ˺q|< FD)D`NN\㆕!X&&,v&3I=9m߇Kx BiIDATx X׽ "1"j%&CQDb jX[iozK1 A/Ab Dr$ M-Tmb }qN={yϰ̚5kfY;~ÿܥUnTgl>s΂t:x?< ?m,GyD.nݺ]v_q/U Kn2*\g_r'''WWW\|j/8 p e03~[****//?}t]]W fo΂틇`?@9̢z~ w!YhW?RRRv ԅl?>$$$ :::77W}o4(& fEDD޽+:O۷,{ڿaaa#m>6|饗$߿K.SN_|e={(ouٺuOZbgnX|`/_, $9v'e60c Y^n,{G|oPXBJ[>2e]8]yӟ*JHH^NGCX9.Üz-/$:[l>0`_|tes+h 8pi}9ݩyi5k"N66!C$+GY 7jW7o⪳hMͭHNN+Wjɂ+,+8]HH`M] sN$K[RX?@+WTHUaS*F)>("YJ~ewt ;Zt0֔Jyeyذa:|pW#u#MLL^t\W; s3Y;6NV1113fl]BlRLvj^Z믿.w}7"p; BRR{q)XMdADrմ.zy޼ʮ: fn+47ÜMnD3Y^z%Dt4z_]w+΂ŏ^O͆ׯ"^{m׮]0tP+"{.XUQ3IaY>pqڵ}釥KWbiuYsر h3gA?Ӵ4#-.tT8fwbcceyղ?I7cWJkI ޽{%ݜA6r.]!6)&;5/-*df¿n>j8qb.]~:)=A-,;wNz/dj tM'Ut;:`$<<\{Aee0U֝[J7X(22R?)ύ:{3&$$D>֭q5ˣ,;VvgjgtؤԼzjjjds??u1 ͜p|X(ڻ-O>$",u=B{xj~DX5K7 g ؆h>6l,-WuZZ"`ٳ.[*++ ܸqcAAAEEEmm-`HS'|R`=|k׮ra3fĉͣZW)++k3gᡇLS"4YHMM 99֥p/ZG.**q)rmۖ[ZZzrYh,@S8 ~g,o+A!jIhWXB~gkgUv!BȊ>Y 7N!BȊ.BIMgΜ|2, BȪ`eQQQiiɓ'Ϝ9SWW8 &˪ HE= x˻3dܴ)~*Bȗ^]PPPZZZ]]][[8 !uw/?w9y[9罢= 7Μ{"ٱBgZu좢Y@/N=:%׈/Mpsz,M~ՓTB>,ܺugpBUɽC&=WVZ>4 ,,B+霸'Vt0qN;?8y//}61F0-bcO?~|AY@ggpqmc:&_*ЯV\[Q捍U={~}+, 8 yޜ1mtIϫeKGu2>{w22RG~XE:)ip]]YCCɣS7!j}!Piܞ6΂6$3ŬY/V[̜9c8Q=zܦFLԼ#)>K[尰[e5~]9,, FBX{g"΂t#"z46VdAA O @~t<"P9  Ymi/=&f(wD))v\*3; .v~}Y@gg6Ӿ'Ytiw/B6n;)O-~œWt/;cb0 J-•+oe˦'&AY>sfoj( Y@gg6ӱgf !=)=#X~s矜<ʎ pC}ɓGt l37IJe#"zWN jnmDZ9!F$ K/:0(8?{$>H:?^[jDggpjP7rDU5uh{'HT#B8 8 PչWL+咭Px|>*R,,B] BuG~Vs!u~E!N A/p:]z<ᩯ̅sp葟 }RY\gAk :;rg!/5O'q+ky FG+R~΂w8 ʔ&B!GY8 \;a_CSsC~e[t`ss=|JlpY}B^wsY|`Jv3%w3kw0B8 8 !Zt0kSEEEuuijkk/_LpB!BVoN Vɝɓr 8 !7*~Y|OrjoXg%7jӎ_/.((Muuumm-^Y@!pp\+Ew&{4oڜ*ОSysgXADBnNDnNEEE555-эdrb"5l9|*SCBY~gtɊqG_e2rջ|'O3CBb{7K!jpV(OxyLlulOCo8 LN\,:G!,U+pJ 綂S+M~CnrU%Bgr9BaVys? 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.partialresponse; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.HashMap; import java.util.Map; /** * The Partial response pattern is a design pattern in which client specifies fields to fetch to serve. * Here {@link App} is playing as client for {@link VideoResource} server. * Client ask for specific fields information in video to server. *

*

* {@link VideoResource} act as server to serve video information. */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Method as act client and request to server for video details. * * @param args program argument. */ public static void main(String[] args) throws Exception { Map videos = new HashMap<>(); videos.put(1, new Video(1, "Avatar", 178, "epic science fiction film", "James Cameron", "English")); videos.put(2, new Video(2, "Godzilla Resurgence", 120, "Action & drama movie|", "Hideaki Anno", "Japanese")); videos.put(3, new Video(3, "Interstellar", 169, "Adventure & Sci-Fi", "Christopher Nolan", "English")); VideoResource videoResource = new VideoResource(new FieldJsonMapper(), videos); LOGGER.info("Retrieving full response from server:-"); LOGGER.info("Get all video information:"); String videoDetails = videoResource.getDetails(1); LOGGER.info(videoDetails); LOGGER.info("----------------------------------------------------------"); LOGGER.info("Retrieving partial response from server:-"); LOGGER.info("Get video @id, @title, @director:"); String specificFieldsDetails = videoResource.getDetails(3, "id", "title", "director"); LOGGER.info(specificFieldsDetails); LOGGER.info("Get video @id, @length:"); String videoLength = videoResource.getDetails(3, "id", "length"); LOGGER.info(videoLength); } } FieldJsonMapper.java000066400000000000000000000043311322244523500352050ustar00rootroot00000000000000java-design-patterns-1.18.0/partial-response/src/main/java/com/iluwatar/partialresponse/* * The MIT License (MIT) * * Copyright (c) 2014-2017 Gopinath Langote * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.partialresponse; import java.lang.reflect.Field; /** * Map a video to json */ public class FieldJsonMapper { /** * @param video object containing video information * @param fields fields information to get * @return json of required fields from video */ public String toJson(Video video, String[] fields) throws Exception { StringBuilder json = new StringBuilder().append("{"); for (int i = 0, fieldsLength = fields.length; i < fieldsLength; i++) { json.append(getString(video, Video.class.getDeclaredField(fields[i]))); if (i != fieldsLength - 1) { json.append(","); } } json.append("}"); return json.toString(); } private String getString(Video video, Field declaredField) throws IllegalAccessException { declaredField.setAccessible(true); Object value = declaredField.get(video); if (declaredField.get(video) instanceof Integer) { return "\"" + declaredField.getName() + "\"" + ": " + value; } return "\"" + declaredField.getName() + "\"" + ": " + "\"" + value.toString() + "\""; } } java-design-patterns-1.18.0/partial-response/src/main/java/com/iluwatar/partialresponse/Video.java000066400000000000000000000046651322244523500333220ustar00rootroot00000000000000/* * The MIT License (MIT) * * Copyright (c) 2014-2017 Gopinath Langote * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.partialresponse; /** * {@link Video} is a entity to serve from server.It contains all video related information.. *

*/ public class Video { private final Integer id; private final String title; private final Integer length; private final String description; private final String director; private final String language; /** * @param id video unique id * @param title video title * @param length video length in minutes * @param description video description by publisher * @param director video director name * @param language video language {private, public} */ public Video(Integer id, String title, Integer length, String description, String director, String language) { this.id = id; this.title = title; this.length = length; this.description = description; this.director = director; this.language = language; } /** * @return json representaion of video */ @Override public String toString() { return "{" + "\"id\": " + id + "," + "\"title\": \"" + title + "\"," + "\"length\": " + length + "," + "\"description\": \"" + description + "\"," + "\"director\": \"" + director + "\"," + "\"language\": \"" + language + "\"," + "}"; } } VideoResource.java000066400000000000000000000041651322244523500347460ustar00rootroot00000000000000java-design-patterns-1.18.0/partial-response/src/main/java/com/iluwatar/partialresponse/* * The MIT License (MIT) * * Copyright (c) 2014-2017 Gopinath Langote * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.partialresponse; import java.util.Map; /** * The resource class which serves video information. * This class act as server in the demo. Which has all video details. */ public class VideoResource { private FieldJsonMapper fieldJsonMapper; private Map videos; /** * @param fieldJsonMapper map object to json. * @param videos initialize resource with existing videos. Act as database. */ public VideoResource(FieldJsonMapper fieldJsonMapper, Map videos) { this.fieldJsonMapper = fieldJsonMapper; this.videos = videos; } /** * @param id video id * @param fields fields to get information about * @return full response if no fields specified else partial response for given field. */ public String getDetails(Integer id, String... fields) throws Exception { if (fields.length == 0) { return videos.get(id).toString(); } return fieldJsonMapper.toJson(videos.get(id), fields); } } java-design-patterns-1.18.0/partial-response/src/test/000077500000000000000000000000001322244523500226675ustar00rootroot00000000000000java-design-patterns-1.18.0/partial-response/src/test/java/000077500000000000000000000000001322244523500236105ustar00rootroot00000000000000java-design-patterns-1.18.0/partial-response/src/test/java/com/000077500000000000000000000000001322244523500243665ustar00rootroot00000000000000java-design-patterns-1.18.0/partial-response/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500262165ustar00rootroot00000000000000java-design-patterns-1.18.0/partial-response/src/test/java/com/iluwatar/partialresponse/000077500000000000000000000000001322244523500314315ustar00rootroot00000000000000java-design-patterns-1.18.0/partial-response/src/test/java/com/iluwatar/partialresponse/AppTest.java000066400000000000000000000025301322244523500336540ustar00rootroot00000000000000/* * The MIT License (MIT) * * Copyright (c) 2014-2017 Gopinath Langote * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.partialresponse; import org.junit.Test; /** * Application test */ public class AppTest { @Test public void main() throws Exception { String[] args = {}; App.main(args); } }FieldJsonMapperTest.java000066400000000000000000000036401322244523500361020ustar00rootroot00000000000000java-design-patterns-1.18.0/partial-response/src/test/java/com/iluwatar/partialresponse/* * The MIT License (MIT) * * Copyright (c) 2014-2017 Gopinath Langote * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.partialresponse; import org.junit.Before; import org.junit.Test; import static org.junit.Assert.assertEquals; /** * tests {@link FieldJsonMapper}. */ public class FieldJsonMapperTest { private FieldJsonMapper mapper; @Before public void setUp() { mapper = new FieldJsonMapper(); } @Test public void shouldReturnJsonForSpecifiedFieldsInVideo() throws Exception { String[] fields = new String[]{"id", "title", "length"}; Video video = new Video(2, "Godzilla Resurgence", 120, "Action & drama movie|", "Hideaki Anno", "Japanese"); String jsonFieldResponse = mapper.toJson(video, fields); String expectedDetails = "{\"id\": 2,\"title\": \"Godzilla Resurgence\",\"length\": 120}"; assertEquals(expectedDetails, jsonFieldResponse); } }VideoResourceTest.java000066400000000000000000000057651322244523500356500ustar00rootroot00000000000000java-design-patterns-1.18.0/partial-response/src/test/java/com/iluwatar/partialresponse/* * The MIT License (MIT) * * Copyright (c) 2014-2017 Gopinath Langote * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.partialresponse; import org.junit.Before; import org.junit.Test; import org.junit.runner.RunWith; import org.mockito.Mock; import org.mockito.runners.MockitoJUnitRunner; import java.util.HashMap; import java.util.Map; import static org.junit.Assert.assertEquals; import static org.mockito.Matchers.any; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.when; /** * tests {@link VideoResource}. */ @RunWith(MockitoJUnitRunner.class) public class VideoResourceTest { @Mock private FieldJsonMapper fieldJsonMapper; private VideoResource resource; @Before public void setUp() { Map videos = new HashMap<>(); videos.put(1, new Video(1, "Avatar", 178, "epic science fiction film", "James Cameron", "English")); videos.put(2, new Video(2, "Godzilla Resurgence", 120, "Action & drama movie|", "Hideaki Anno", "Japanese")); videos.put(3, new Video(3, "Interstellar", 169, "Adventure & Sci-Fi", "Christopher Nolan", "English")); resource = new VideoResource(fieldJsonMapper, videos); } @Test public void shouldGiveVideoDetailsById() throws Exception { String actualDetails = resource.getDetails(1); String expectedDetails = "{\"id\": 1,\"title\": \"Avatar\",\"length\": 178,\"description\": " + "\"epic science fiction film\",\"director\": \"James Cameron\",\"language\": \"English\",}"; assertEquals(expectedDetails, actualDetails); } @Test public void shouldGiveSpecifiedFieldsInformationOfVideo() throws Exception { String[] fields = new String[]{"id", "title", "length"}; String expectedDetails = "{\"id\": 1,\"title\": \"Avatar\",\"length\": 178}"; when(fieldJsonMapper.toJson(any(Video.class), eq(fields))).thenReturn(expectedDetails); String actualFieldsDetails = resource.getDetails(2, fields); assertEquals(expectedDetails, actualFieldsDetails); } }java-design-patterns-1.18.0/poison-pill/000077500000000000000000000000001322244523500200765ustar00rootroot00000000000000java-design-patterns-1.18.0/poison-pill/README.md000066400000000000000000000011161322244523500213540ustar00rootroot00000000000000--- layout: pattern title: Poison Pill folder: poison-pill permalink: /patterns/poison-pill/ categories: Other tags: - Java - Difficulty-Intermediate - Reactive --- ## Intent Poison Pill is known predefined data item that allows to provide graceful shutdown for separate distributed consumption process. ![alt text](./etc/poison-pill.png "Poison Pill") ## Applicability Use the Poison Pill idiom when * need to send signal from one thread/process to another to terminate ## Real world examples * [akka.actor.PoisonPill](http://doc.akka.io/docs/akka/2.1.4/java/untyped-actors.html) java-design-patterns-1.18.0/poison-pill/etc/000077500000000000000000000000001322244523500206515ustar00rootroot00000000000000java-design-patterns-1.18.0/poison-pill/etc/poison-pill.png000066400000000000000000000367311322244523500236360ustar00rootroot00000000000000PNG  IHDR@ac=IDATx_՝wUȉ#` uF(  xT@xG&&BGA~`Qal 3%nQg,06ȏӲ(ݎn߾m# :cwX)Imukq/Y⹊XA~b%}|sm%RZ߄ `!AM2n&ֲނ- ?@bY}Zlٶ{ܝxA~D 3gm1nikVVbېA~Dm%ugswm&;{F=wuݑ PȏLT06ȏL<* L< # `!ģ ?@006ȏL<* L< #t_\ydz_~jmĴ(trA~k?+^s1)1=ux(wA~hSu ~򵳯؉R=º>4/]z7H}k3Ν;( lOVwbIIXHXal eSgO~y;o+x[09}5ҭ -GG7|i#T_'f{nm]Kg 1|h06ȏL/ >[{NX6G~t|^ӿG7w[F>[Zj9!ܶ6,¤,L>MUY1~Wh;W>H3dң8xW|2-B1+^&vv9+&ĬgzA #,?sx%GxoJ}g=uҞU n\/70 0Ias债włCpϲ]yMn-"KcrӂPt'EM970wML<@u es|㟎S7=w_|oԡۿ~Sϝ;(\o 8 >AqiE' QS];>|.>i餭0ox ?@Js(i:ʙ w x)yLǗh⥓N+оtɭN[lViط\&݈&&:ȏL}k[O.h΁ǟ9.roX!}Ay?Pz.Uf.ҽ2ĞXˠ{E1#51A~4{t;ޡqOk;p2n4rY< Ѽ&^|'CwWO.ŕƥcV ~yk~x0O&1o\Q4Mk_tSPGA?9ptx_ߵK?+Mje򕿋k'_wn/YwRq܋KQxҘiҖZ*++r7_PGAOlN'g߾d-صLiQv𥨢DJ syhaKܥ `!(w﫹{C36-uW&wє돛oGG7(al x ?@006ȏL<* L< # `!ģ ?@006ȏLDckvGdO-06ȏ8َɘzajl6[)}? 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.poison.pill; /** * One of the possible approaches to terminate Producer-Consumer pattern is using the Poison Pill * idiom. If you use Poison Pill as the termination signal then Producer is responsible to notify * Consumer that the exchange is over and reject any further messages. The Consumer receiving Poison * Pill will stop reading messages from the queue. You must also ensure that the Poison Pill will be * the last message that will be read from the queue (if you have prioritized queue then this can be * tricky). *

* In simple cases the Poison Pill can be just a null-reference, but holding a unique separate * shared object-marker (with name "Poison" or "Poison Pill") is more clear and self describing. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { MessageQueue queue = new SimpleMessageQueue(10000); final Producer producer = new Producer("PRODUCER_1", queue); final Consumer consumer = new Consumer("CONSUMER_1", queue); new Thread() { @Override public void run() { consumer.consume(); } }.start(); new Thread() { @Override public void run() { producer.send("hand shake"); producer.send("some very important information"); producer.send("bye!"); producer.stop(); } }.start(); } } java-design-patterns-1.18.0/poison-pill/src/main/java/com/iluwatar/poison/pill/Consumer.java000066400000000000000000000043401322244523500320460ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.poison.pill; import com.iluwatar.poison.pill.Message.Headers; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Class responsible for receiving and handling submitted to the queue messages */ public class Consumer { private static final Logger LOGGER = LoggerFactory.getLogger(Consumer.class); private final MqSubscribePoint queue; private final String name; public Consumer(String name, MqSubscribePoint queue) { this.name = name; this.queue = queue; } /** * Consume message */ public void consume() { while (true) { Message msg; try { msg = queue.take(); if (Message.POISON_PILL.equals(msg)) { LOGGER.info("Consumer {} receive request to terminate.", name); break; } } catch (InterruptedException e) { // allow thread to exit LOGGER.error("Exception caught.", e); return; } String sender = msg.getHeader(Headers.SENDER); String body = msg.getBody(); LOGGER.info("Message [{}] from [{}] received by [{}]", body, sender, name); } } } java-design-patterns-1.18.0/poison-pill/src/main/java/com/iluwatar/poison/pill/Message.java000066400000000000000000000043141322244523500316400ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.poison.pill; import java.util.Map; /** * Interface that implements the Message pattern and represents an inbound or outbound message as * part of an {@link Producer}-{@link Consumer} exchange. */ public interface Message { Message POISON_PILL = new Message() { @Override public void addHeader(Headers header, String value) { throw poison(); } @Override public String getHeader(Headers header) { throw poison(); } @Override public Map getHeaders() { throw poison(); } @Override public void setBody(String body) { throw poison(); } @Override public String getBody() { throw poison(); } private RuntimeException poison() { return new UnsupportedOperationException("Poison"); } }; /** * Enumeration of Type of Headers */ public enum Headers { DATE, SENDER } void addHeader(Headers header, String value); String getHeader(Headers header); Map getHeaders(); void setBody(String body); String getBody(); } java-design-patterns-1.18.0/poison-pill/src/main/java/com/iluwatar/poison/pill/MessageQueue.java000066400000000000000000000025211322244523500326430ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.poison.pill; /** * Represents abstraction of channel (or pipe) that bounds {@link Producer} and {@link Consumer} */ public interface MessageQueue extends MqPublishPoint, MqSubscribePoint { } java-design-patterns-1.18.0/poison-pill/src/main/java/com/iluwatar/poison/pill/MqPublishPoint.java000066400000000000000000000024561322244523500331770ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.poison.pill; /** * Endpoint to publish {@link Message} to queue */ public interface MqPublishPoint { void put(Message msg) throws InterruptedException; } java-design-patterns-1.18.0/poison-pill/src/main/java/com/iluwatar/poison/pill/MqSubscribePoint.java000066400000000000000000000024541322244523500335100ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.poison.pill; /** * Endpoint to retrieve {@link Message} from queue */ public interface MqSubscribePoint { Message take() throws InterruptedException; } java-design-patterns-1.18.0/poison-pill/src/main/java/com/iluwatar/poison/pill/Producer.java000066400000000000000000000051021322244523500320330ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.poison.pill; import java.util.Date; import com.iluwatar.poison.pill.Message.Headers; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Class responsible for producing unit of work that can be expressed as message and submitted to * queue */ public class Producer { private static final Logger LOGGER = LoggerFactory.getLogger(Producer.class); private final MqPublishPoint queue; private final String name; private boolean isStopped; /** * Constructor */ public Producer(String name, MqPublishPoint queue) { this.name = name; this.queue = queue; this.isStopped = false; } /** * Send message to queue */ public void send(String body) { if (isStopped) { throw new IllegalStateException(String.format( "Producer %s was stopped and fail to deliver requested message [%s].", body, name)); } Message msg = new SimpleMessage(); msg.addHeader(Headers.DATE, new Date().toString()); msg.addHeader(Headers.SENDER, name); msg.setBody(body); try { queue.put(msg); } catch (InterruptedException e) { // allow thread to exit LOGGER.error("Exception caught.", e); } } /** * Stop system by sending poison pill */ public void stop() { isStopped = true; try { queue.put(Message.POISON_PILL); } catch (InterruptedException e) { // allow thread to exit LOGGER.error("Exception caught.", e); } } } java-design-patterns-1.18.0/poison-pill/src/main/java/com/iluwatar/poison/pill/SimpleMessage.java000066400000000000000000000035361322244523500330170ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.poison.pill; import java.util.Collections; import java.util.HashMap; import java.util.Map; /** * {@link Message} basic implementation */ public class SimpleMessage implements Message { private Map headers = new HashMap<>(); private String body; @Override public void addHeader(Headers header, String value) { headers.put(header, value); } @Override public String getHeader(Headers header) { return headers.get(header); } @Override public Map getHeaders() { return Collections.unmodifiableMap(headers); } @Override public void setBody(String body) { this.body = body; } @Override public String getBody() { return body; } } SimpleMessageQueue.java000066400000000000000000000032521322244523500337400ustar00rootroot00000000000000java-design-patterns-1.18.0/poison-pill/src/main/java/com/iluwatar/poison/pill/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.poison.pill; import java.util.concurrent.ArrayBlockingQueue; import java.util.concurrent.BlockingQueue; /** * Bounded blocking queue wrapper */ public class SimpleMessageQueue implements MessageQueue { private final BlockingQueue queue; public SimpleMessageQueue(int bound) { queue = new ArrayBlockingQueue<>(bound); } @Override public void put(Message msg) throws InterruptedException { queue.put(msg); } @Override public Message take() throws InterruptedException { return queue.take(); } } java-design-patterns-1.18.0/poison-pill/src/test/000077500000000000000000000000001322244523500216445ustar00rootroot00000000000000java-design-patterns-1.18.0/poison-pill/src/test/java/000077500000000000000000000000001322244523500225655ustar00rootroot00000000000000java-design-patterns-1.18.0/poison-pill/src/test/java/com/000077500000000000000000000000001322244523500233435ustar00rootroot00000000000000java-design-patterns-1.18.0/poison-pill/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500251735ustar00rootroot00000000000000java-design-patterns-1.18.0/poison-pill/src/test/java/com/iluwatar/poison/000077500000000000000000000000001322244523500265025ustar00rootroot00000000000000java-design-patterns-1.18.0/poison-pill/src/test/java/com/iluwatar/poison/pill/000077500000000000000000000000001322244523500274425ustar00rootroot00000000000000java-design-patterns-1.18.0/poison-pill/src/test/java/com/iluwatar/poison/pill/AppTest.java000066400000000000000000000025141322244523500316670ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.poison.pill; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/poison-pill/src/test/java/com/iluwatar/poison/pill/ConsumerTest.java000066400000000000000000000071151322244523500327440ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.poison.pill; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.slf4j.LoggerFactory; import java.time.LocalDateTime; import java.util.LinkedList; import java.util.List; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Date: 12/27/15 - 9:45 PM * * @author Jeroen Meulemeester */ public class ConsumerTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(Consumer.class); } @AfterEach public void tearDown() { appender.stop(); } @Test public void testConsume() throws Exception { final Message[] messages = new Message[]{ createMessage("you", "Hello!"), createMessage("me", "Hi!"), Message.POISON_PILL, createMessage("late_for_the_party", "Hello? Anyone here?"), }; final MessageQueue queue = new SimpleMessageQueue(messages.length); for (final Message message : messages) { queue.put(message); } new Consumer("NSA", queue).consume(); assertTrue(appender.logContains("Message [Hello!] from [you] received by [NSA]")); assertTrue(appender.logContains("Message [Hi!] from [me] received by [NSA]")); assertTrue(appender.logContains("Consumer NSA receive request to terminate.")); } /** * Create a new message from the given sender with the given message body * * @param sender The sender's name * @param message The message body * @return The message instance */ private static Message createMessage(final String sender, final String message) { final SimpleMessage msg = new SimpleMessage(); msg.addHeader(Message.Headers.SENDER, sender); msg.addHeader(Message.Headers.DATE, LocalDateTime.now().toString()); msg.setBody(message); return msg; } private class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender(Class clazz) { ((Logger) LoggerFactory.getLogger(clazz)).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public boolean logContains(String message) { return log.stream().anyMatch(event -> event.getFormattedMessage().equals(message)); } } } PoisonMessageTest.java000066400000000000000000000044731322244523500336520ustar00rootroot00000000000000java-design-patterns-1.18.0/poison-pill/src/test/java/com/iluwatar/poison/pill/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.poison.pill; import org.junit.jupiter.api.Test; import static com.iluwatar.poison.pill.Message.Headers; import static com.iluwatar.poison.pill.Message.POISON_PILL; import static org.junit.jupiter.api.Assertions.assertThrows; /** * Date: 12/27/15 - 10:30 PM * * @author Jeroen Meulemeester */ public class PoisonMessageTest { @Test public void testAddHeader() throws Exception { assertThrows(UnsupportedOperationException.class, () -> { POISON_PILL.addHeader(Headers.SENDER, "sender"); }); } @Test public void testGetHeader() throws Exception { assertThrows(UnsupportedOperationException.class, () -> { POISON_PILL.getHeader(Headers.SENDER); }); } @Test public void testGetHeaders() throws Exception { assertThrows(UnsupportedOperationException.class, () -> { POISON_PILL.getHeaders(); }); } @Test public void testSetBody() throws Exception { assertThrows(UnsupportedOperationException.class, () -> { POISON_PILL.setBody("Test message."); }); } @Test public void testGetBody() throws Exception { assertThrows(UnsupportedOperationException.class, () -> { POISON_PILL.getBody(); }); } } java-design-patterns-1.18.0/poison-pill/src/test/java/com/iluwatar/poison/pill/ProducerTest.java000066400000000000000000000062301322244523500327310ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.poison.pill; import org.junit.jupiter.api.Test; import org.mockito.ArgumentCaptor; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.fail; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/27/15 - 10:32 PM * * @author Jeroen Meulemeester */ public class ProducerTest { @Test public void testSend() throws Exception { final MqPublishPoint publishPoint = mock(MqPublishPoint.class); final Producer producer = new Producer("producer", publishPoint); verifyZeroInteractions(publishPoint); producer.send("Hello!"); final ArgumentCaptor messageCaptor = ArgumentCaptor.forClass(Message.class); verify(publishPoint).put(messageCaptor.capture()); final Message message = messageCaptor.getValue(); assertNotNull(message); assertEquals("producer", message.getHeader(Message.Headers.SENDER)); assertNotNull(message.getHeader(Message.Headers.DATE)); assertEquals("Hello!", message.getBody()); verifyNoMoreInteractions(publishPoint); } @Test public void testStop() throws Exception { final MqPublishPoint publishPoint = mock(MqPublishPoint.class); final Producer producer = new Producer("producer", publishPoint); verifyZeroInteractions(publishPoint); producer.stop(); verify(publishPoint).put(eq(Message.POISON_PILL)); try { producer.send("Hello!"); fail("Expected 'IllegalStateException' at this point, since the producer has stopped!"); } catch (IllegalStateException e) { assertNotNull(e); assertNotNull(e.getMessage()); assertEquals("Producer Hello! was stopped and fail to deliver requested message [producer].", e.getMessage()); } verifyNoMoreInteractions(publishPoint); } } SimpleMessageTest.java000066400000000000000000000045521322244523500336320ustar00rootroot00000000000000java-design-patterns-1.18.0/poison-pill/src/test/java/com/iluwatar/poison/pill/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.poison.pill; import org.junit.jupiter.api.Test; import java.util.Map; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertThrows; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Date: 12/27/15 - 10:25 PM * * @author Jeroen Meulemeester */ public class SimpleMessageTest { @Test public void testGetHeaders() { final SimpleMessage message = new SimpleMessage(); assertNotNull(message.getHeaders()); assertTrue(message.getHeaders().isEmpty()); final String senderName = "test"; message.addHeader(Message.Headers.SENDER, senderName); assertNotNull(message.getHeaders()); assertFalse(message.getHeaders().isEmpty()); assertEquals(senderName, message.getHeaders().get(Message.Headers.SENDER)); } @Test public void testUnModifiableHeaders() { final SimpleMessage message = new SimpleMessage(); final Map headers = message.getHeaders(); assertThrows(UnsupportedOperationException.class, () -> { headers.put(Message.Headers.SENDER, "test"); }); } }java-design-patterns-1.18.0/pom.xml000066400000000000000000000465211322244523500171560ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 pom 2014 UTF-8 5.0.1.Final 4.2.4.RELEASE 1.3.3.RELEASE 1.9.2.RELEASE 1.4.190 4.12 5.0.2 ${junit.version}.2 1.0.2 1.0.2 3.0 0.7.2.201409121644 1.4 2.16.1 19.0 1.10.19 4.5.2 2.22 4.0 3.3.0 1.7.21 1.1.7 abstract-factory tls builder factory-method prototype singleton adapter bridge composite dao data-mapper decorator facade flyweight proxy chain command interpreter iterator mediator memento model-view-presenter observer state strategy template-method visitor double-checked-locking servant service-locator null-object event-aggregator callback execute-around property intercepting-filter producer-consumer poison-pill reader-writer-lock lazy-loading service-layer specification tolerant-reader model-view-controller flux double-dispatch multiton resource-acquisition-is-initialization thread-pool twin private-class-data object-pool dependency-injection naked-objects front-controller repository async-method-invocation monostate step-builder business-delegate half-sync-half-async layers message-channel fluentinterface reactor caching publish-subscribe delegation event-driven-architecture api-gateway factory-kit feature-toggle value-object module monad mute-idiom mutex semaphore hexagonal abstract-document aggregator-microservices promise page-object event-asynchronous event-queue queue-load-leveling object-mother data-bus converter guarded-suspension balking extension-objects marker cqrs event-sourcing data-transfer-object throttling unit-of-work partial-response eip-wire-tap eip-splitter eip-aggregator retry jitpack.io https://jitpack.io org.hibernate hibernate-core ${hibernate.version} org.hibernate hibernate-entitymanager ${hibernate.version} org.springframework.boot spring-boot-dependencies ${spring-boot.version} pom import org.springframework.data spring-data-jpa ${spring-data.version} org.springframework spring-webmvc ${spring.version} org.springframework.boot spring-boot-starter-web ${spring-boot.version} org.apache.httpcomponents httpclient ${apache-httpcomponents.version} com.h2database h2 ${h2.version} commons-dbcp commons-dbcp ${commons-dbcp.version} org.apache.camel camel-core ${camel.version} org.apache.camel camel-stream ${camel.version} org.junit.jupiter junit-jupiter-api ${junit-jupiter.version} test junit junit ${junit.version} test org.junit.jupiter junit-jupiter-engine ${junit-jupiter.version} test org.junit.jupiter junit-jupiter-params ${junit-jupiter.version} test org.junit.jupiter junit-jupiter-migrationsupport ${junit-jupiter.version} test org.junit.vintage junit-vintage-engine ${junit-vintage.version} test com.github.sbrannen spring-test-junit5 ${sping-test-junit5.version} test org.mockito mockito-core ${mockito.version} test com.google.guava guava ${guava.version} net.sourceforge.htmlunit htmlunit ${htmlunit.version} test com.google.inject guice ${guice.version} org.mongodb mongo-java-driver ${mongo-java-driver.version} org.slf4j slf4j-api ${slf4j.version} ch.qos.logback logback-classic ${logback.version} ch.qos.logback logback-core ${logback.version} org.eclipse.m2e lifecycle-mapping 1.0.0 org.jacoco jacoco-maven-plugin [0.6.2,) prepare-agent org.apache.maven.plugins maven-compiler-plugin ${compiler.version} 1.8 1.8 org.jacoco jacoco-maven-plugin ${jacoco.version} prepare-agent prepare-agent org.apache.maven.plugins maven-checkstyle-plugin 2.17 validate check validate checkstyle.xml checkstyle-suppressions.xml UTF-8 true true true org.apache.maven.plugins maven-surefire-plugin 2.19.1 org.junit.platform junit-platform-surefire-provider ${junit-platform.version} -Xmx1024M ${argLine} org.apache.maven.plugins maven-pmd-plugin 3.6 true 5 true check exclude-pmd.properties com.mycila license-maven-plugin 2.11

com/mycila/maven/plugin/license/templates/MIT.txt
Ilkka Seppälä true install-format install format org.apache.maven.plugins maven-pmd-plugin 3.6 java-design-patterns-1.18.0/private-class-data/000077500000000000000000000000001322244523500213155ustar00rootroot00000000000000java-design-patterns-1.18.0/private-class-data/README.md000066400000000000000000000010631322244523500225740ustar00rootroot00000000000000--- layout: pattern title: Private Class Data folder: private-class-data permalink: /patterns/private-class-data/ categories: Other tags: - Java - Difficulty-Beginner - Idiom --- ## Intent Private Class Data design pattern seeks to reduce exposure of attributes by limiting their visibility. It reduces the number of class attributes by encapsulating them in single Data object. ![alt text](./etc/private-class-data.png "Private Class Data") ## Applicability Use the Private Class Data pattern when * you want to prevent write access to class data members java-design-patterns-1.18.0/private-class-data/etc/000077500000000000000000000000001322244523500220705ustar00rootroot00000000000000java-design-patterns-1.18.0/private-class-data/etc/private-class-data.png000066400000000000000000000250471322244523500262720ustar00rootroot00000000000000PNG  IHDR2<)IDATxE/1HD 71i j9JHICJ᤼*6T*`ߵ7ZixmĊF $}SP%'$`bH /x/3;_wvg_{|wf=3ݹt&S/A.` Aay%_@Չg奅2Z`&Ò1GTq~V,\a\sX" Xe`( `;%0r;lknyU~Zr9 ,+誢XFEd, DK XRUEXʙh#exįew6o%ZWǃTZQgh%m;Kt]Q),=ȹe7FER+?q,{Oպ/KtQEKޘ{ҒB ỊKI!=r۱DA{F[KՋ?02`Y^iRv*FDAQUEX|H@.eAc1dgN/lTmQZQ_,ˡϖ(観RaN EYԨ/o*XeI0x`8\K|,}2DQw.KDaK߹ ,,}2D,_}#_ɵlglOSG..AasIK_7A2},8GXҾ+WN̛Oտx}]xzKU?U#l#D8₨wZ~_@Z[B cn؅ޓ{νV^ ?<]ۧxb\l1>H銣v,u6,Pvr߼h//:3l<{ly*NͦX$ ?$r2 R92 x+ Xy;zUa,7޾eW>[~I]= oaiC1jJ:)y'%*ɶLi O\"K&J(V1#yZeҁs 5%)䁍EW{m\re6_|QٕLh>#OJ(-hւ(?mB],+4,I`RĬO+ׄT[˯ܼAڲ,xo62 ~KdS㓸T8'mre R?NLRa,͚Ў*0Aeۇ;?s_z{rg?-;b?<+ǥN,\-XNWz[Zjj|{_w{O{ zێ`=#}nD6-XNWbܡ`?igK uԄVTd쑋۸O|g}{'^ZP2 ߿q֭z|˶ɖF 8 ,'uv^ж+~v#B l _ lK߹ ,,}2DQw.KDaK߹ ,*,GdtՌckM9j˩e]I ˉT`S87gt,gu%K1J]IYztav6.G<餸t\eaG|A WvR2вԏ -(%b(STohG+:u!suu:s9,C-+LXjY.<:FRAP◃p0GW(ip\T^f@ +0[xq$TvLͦ&E5Ee]yç87E/~J!qGXՐO+Ǘ~/9K"̲´'&Xe`( `;%0\sX" Xe`( ;]ЁʱD- ů*8:Qw.KDaK߹ ,,}rUB ]>meAk9%0aV6U,Zd<͠/%AS,/`9Dä?c_;Ҝˎ٤i9J۞i(/ws),CvKҎmt6gKɭ,IkQ-(i}߬eVO[ ?:%0j-?X=2%l-2"$ZTe!Tnb+{ww}EK5?lie~bs;*H 8yۍ.͗ZUjmL.͕8+,[ [?y)_5ĚXEW,&'敗ۺTA-g饋cwǮAQae]O?ilL#u⼗̛oI{˾Xr][z:ib <42 , X~[ڵ=qll^,my~zo5}H^޸ZM`prX8c7zf3+lceSI63;k&V{6˟%J-%+Lnb c)]X|>cc9zvu6K=lX]w9o|"eĕGUwfS|<.&3,:;E?H-\J? rskaIHYpĴ,SQw.KDaR[p{Θfij=IrX" oSyN$I%bKO`cyVsX" cF,r'p2AK?+ۅ30k"e`()+v'(ϫ9s"e`(ZK\Ii,E$`gO.# rZΝ@ L8]&ƶ`^K՝"hs 23j艵-N5<Qm <+^K;YF.acoy=AKdZeqbO,˺$7%~ "iw.ʭ,0G.׍Bt`ƛcT:Gҁ֩ uc9;w\ۦas,+0G.׍8mD l-{? ,}rXNʻ+H쌷|IoZOg.XeXNp'3\e1pDsX"Qw.KDaRwٕjQCje`( zXvL])Ļ`\¨g|! 7α=̐Uiݺ :Ђ,XN%˳D4ehZ^^n+4#ܣ ^/lc]}-Dze)7t foY,N!w1Tte7k9rlp'F3sGIWaY`dVܶқC?,h[*Ty,%]XUy,%]XUy,%]XUy,%]XUy,%]&t:>7 *UCXʋU4>it{UBT hAұ=yG%ԩ5[*TyHŝ@i-$/QMF* R*k{⸛e/Ns[cZE?Jڙ΁P`'pVVϬcc9zvu6Kk ݦ*>Z8$wi>Ny]>)<,]~@6rU?H1;?ԧ` -ֆÒב jTyH˶GUBXUy,%]XUy,%]XUy,%]XUyX3YM n`T 6gs'XiqrzX.Ù ƺ~7>vA;l0z_g,b46-3`H 6+r'{d#NΨ߉;$-ΞBu.Uf~ `"w2%J19́is*uF>Zh,۫`"wB,㦬ӱ8L8H)<ȝK2MD s{OM`"w<, K|I.=˧Eb)eoS . XMJRb;` lEȂe(ݡbi XBPʞ8shnbK$t)xOY|&RHWXBP=p"'` A,!% rDNHoOm%7| XBk׮Ç'KoKh>g?4 laj,!r fehMXB%LeMXB44 h*i06` k$6`/t Jb%2U T'<)+XB\KX ` 5xow\֤5J*?9+K{]m2o9*[ffi*%$#%,%$XB\K+MMGmq a#מ?Hm_qH6fTdb#ݭg,` )X;UN{rϹw^>S{Y#uVbD}(yy,i\9dYS]7=|o?sN ~3wB%qT8A6KPk[fc*ׂ쳌Yxx_-w?|o&qvN7IG H-X<5"0Gm*<2[lO,:KvzZW{m\re6_|QYc(0PH^|HM|[ӄ|"?&5nbS~Z˯ܼAqڲ,xo62 ~"Uj7bV3Mk-SҞXBuqۇ;?_z{rg||p\=:ZK)"lv26{KL>&֑XBuOO-\yGzێ`=Ic([0tK՜AdD*ahSd쑋۸O|gc/f{L&` {ݱ?튟~k1'2,!`I.%,%$XBrK$qx캗j- Ω^XByjK1MSo^:u#g/hp?bI;c9isyKK@a)xE-ygy,V\,cl4xh֚Xp:tR[5Y{[Iȕ2~9~GIe,3?KZ5Zݍr,~4ݔ&ӗ 2~` Q]>|Ҏ%o OwIL3R̬D+](Z,!"jwO"%$XB\KX ` M֭Q+JX.:h-E%,%$XB\KX ` 5kuӝxi6PX.&FE%'(˷,{df lMVeV Ӎ5mz6Yod+,VLy2sf׬Gl` Q!س%cXfkV,;FZ*gR*5>((٦ ӠKȗ )XZFm|RUN,2ZfKȗJKwgfHs4V,q8K}ܲ{i̹E|5lb%]hX ?gJ,ޠŖvQcR <'k.':o]>}<H$XB\KX ` Kr,!`I.%,%$jKm9c2^9,q) NߐQɘrӁ%dѼ3H*q'KՅ@>7 E,!Jηޝ:+B R}pf %dQ!"eEy39s[E,!Lr]cM܋XB5N?I~v v./` YԘ;Q]\XYɋXBa8$XB\KX ` Kr,!`I.%,%$jtviy<1 n¶*&.uEԗX0t` U!J;X੖@l%TVG^<{L`L,!@vXBe՘;(WkfpXRcY’DJ` UUR3ȷ,T I5N < IZvhq|`YS̀Tcwtu@l%TVN@-%,%$XB\KX ` Kr,!`I.%,v'{9 %C` 5N -VIpjCہ%԰;B6H]:ֹ'd:uv'PZK/6˺y<{ӠĒu'О-M_ t' VZmŒM` 5N %(lOXBmмϖhe6в[\x ,!ښ' w儕udgNOyCXBX[T?KZKj,!XXB\KX ` Kr,ɺut Jb%2U T%蠵%$ k>˟+//WE ` Mݐyl껨,m/dKX ` }+yv8*97} o&Pw?+W]e11|2[* X?d`)cc9zvu6Kk ݦ*>Z8$w2NJ,oeqL{SGT$wi IF(  bw%%~ Dza}`pX:Rb8a$XB\KX ` Kr,!`I.%,<`7φȞW.dۻ Ǹ`V)@۩KPX3fe1yLѳֺ0z>ǸJ>XBӺ彡ѫ OtsJ^} |9iK(Cc\`2J>jhAi2* r|c<1B%f-ifiePfcR-=K3i=C7(o\,B,N`ВVoN~kxR_&n(wVO ]S1%T( #kZwgtai`bi ԁPraYʝz9Xn,c.qo2v4zO ݴUՍ%Tr|ʸ.z a=(w^3%RMqdQ֔ɳ#P9`9`%,%$XB\KX ` Kr,GAr꾘#xKȢ|, (!sD r_^(K)1 |xo$oY4E,!\Xs'p-T.ـ,raIΝh>R$gt^ȅe &.TE,!\Xs'PVt>.q!"E9]> ĩÅeA^(p |yKȢ,;/` Y4XB\KX ` Kr,!`I.%,%$j;A<\ LG)VK}~l#*|, DYJw6d;,;pǬGS82xebРʅ%9whKg i@*+ GAZs/>C eA%TV.,W Ks, % $N < K6X⟘gYФ*ˇ;%]]>ebDИ*8wl%TV4e;,;j,!`I.%,%$XB\KX ` ̝"j;X:~ %2w}*ۓ9PraI՝@-4e}ɴկN`|3)"XBN`mQ)ů˝&,K%$XB\KhnXLU XB9K"d$Ѩtn-IENDB`java-design-patterns-1.18.0/private-class-data/etc/private-class-data.ucls000066400000000000000000000060321322244523500264450ustar00rootroot00000000000000 java-design-patterns-1.18.0/private-class-data/pom.xml000066400000000000000000000040751322244523500226400ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 private-class-data org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.mockito mockito-core test java-design-patterns-1.18.0/private-class-data/src/000077500000000000000000000000001322244523500221045ustar00rootroot00000000000000java-design-patterns-1.18.0/private-class-data/src/main/000077500000000000000000000000001322244523500230305ustar00rootroot00000000000000java-design-patterns-1.18.0/private-class-data/src/main/java/000077500000000000000000000000001322244523500237515ustar00rootroot00000000000000java-design-patterns-1.18.0/private-class-data/src/main/java/com/000077500000000000000000000000001322244523500245275ustar00rootroot00000000000000java-design-patterns-1.18.0/private-class-data/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500263575ustar00rootroot00000000000000java-design-patterns-1.18.0/private-class-data/src/main/java/com/iluwatar/privateclassdata/000077500000000000000000000000001322244523500317115ustar00rootroot00000000000000java-design-patterns-1.18.0/private-class-data/src/main/java/com/iluwatar/privateclassdata/App.java000066400000000000000000000047271322244523500333060ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.privateclassdata; /** * * The Private Class Data design pattern seeks to reduce exposure of attributes by limiting their * visibility. It reduces the number of class attributes by encapsulating them in single data * object. It allows the class designer to remove write privilege of attributes that are intended to * be set only during construction, even from methods of the target class. *

* In the example we have normal {@link Stew} class with some ingredients given in constructor. Then * we have methods to enumerate the ingredients and to taste the stew. The method for tasting the * stew alters the private members of the {@link Stew} class. * * The problem is solved with the Private Class Data pattern. We introduce {@link ImmutableStew} * class that contains {@link StewData}. The private data members of {@link Stew} are now in * {@link StewData} and cannot be altered by {@link ImmutableStew} methods. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { // stew is mutable Stew stew = new Stew(1, 2, 3, 4); stew.mix(); stew.taste(); stew.mix(); // immutable stew protected with Private Class Data pattern ImmutableStew immutableStew = new ImmutableStew(2, 4, 3, 6); immutableStew.mix(); } } ImmutableStew.java000066400000000000000000000036171322244523500352660ustar00rootroot00000000000000java-design-patterns-1.18.0/private-class-data/src/main/java/com/iluwatar/privateclassdata/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.privateclassdata; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Immutable stew class, protected with Private Class Data pattern * */ public class ImmutableStew { private static final Logger LOGGER = LoggerFactory.getLogger(ImmutableStew.class); private StewData data; public ImmutableStew(int numPotatoes, int numCarrots, int numMeat, int numPeppers) { data = new StewData(numPotatoes, numCarrots, numMeat, numPeppers); } /** * Mix the stew */ public void mix() { LOGGER.info("Mixing the immutable stew we find: {} potatoes, {} carrots, {} meat and {} peppers", data.getNumPotatoes(), data.getNumCarrots(), data.getNumMeat(), data.getNumPeppers()); } } java-design-patterns-1.18.0/private-class-data/src/main/java/com/iluwatar/privateclassdata/Stew.java000066400000000000000000000044061322244523500335020ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.privateclassdata; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Mutable stew class * */ public class Stew { private static final Logger LOGGER = LoggerFactory.getLogger(Stew.class); private int numPotatoes; private int numCarrots; private int numMeat; private int numPeppers; /** * Constructor */ public Stew(int numPotatoes, int numCarrots, int numMeat, int numPeppers) { this.numPotatoes = numPotatoes; this.numCarrots = numCarrots; this.numMeat = numMeat; this.numPeppers = numPeppers; } /** * Mix the stew */ public void mix() { LOGGER.info("Mixing the stew we find: {} potatoes, {} carrots, {} meat and {} peppers", numPotatoes, numCarrots, numMeat, numPeppers); } /** * Taste the stew */ public void taste() { LOGGER.info("Tasting the stew"); if (numPotatoes > 0) { numPotatoes--; } if (numCarrots > 0) { numCarrots--; } if (numMeat > 0) { numMeat--; } if (numPeppers > 0) { numPeppers--; } } } StewData.java000066400000000000000000000035431322244523500342160ustar00rootroot00000000000000java-design-patterns-1.18.0/private-class-data/src/main/java/com/iluwatar/privateclassdata/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.privateclassdata; /** * * Stew ingredients * */ public class StewData { private int numPotatoes; private int numCarrots; private int numMeat; private int numPeppers; /** * Constructor */ public StewData(int numPotatoes, int numCarrots, int numMeat, int numPeppers) { this.numPotatoes = numPotatoes; this.numCarrots = numCarrots; this.numMeat = numMeat; this.numPeppers = numPeppers; } public int getNumPotatoes() { return numPotatoes; } public int getNumCarrots() { return numCarrots; } public int getNumMeat() { return numMeat; } public int getNumPeppers() { return numPeppers; } } java-design-patterns-1.18.0/private-class-data/src/test/000077500000000000000000000000001322244523500230635ustar00rootroot00000000000000java-design-patterns-1.18.0/private-class-data/src/test/java/000077500000000000000000000000001322244523500240045ustar00rootroot00000000000000java-design-patterns-1.18.0/private-class-data/src/test/java/com/000077500000000000000000000000001322244523500245625ustar00rootroot00000000000000java-design-patterns-1.18.0/private-class-data/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500264125ustar00rootroot00000000000000java-design-patterns-1.18.0/private-class-data/src/test/java/com/iluwatar/privateclassdata/000077500000000000000000000000001322244523500317445ustar00rootroot00000000000000AppTest.java000066400000000000000000000025211322244523500341100ustar00rootroot00000000000000java-design-patterns-1.18.0/private-class-data/src/test/java/com/iluwatar/privateclassdata/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.privateclassdata; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } ImmutableStewTest.java000066400000000000000000000051661322244523500361620ustar00rootroot00000000000000java-design-patterns-1.18.0/private-class-data/src/test/java/com/iluwatar/privateclassdata/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.privateclassdata; import com.iluwatar.privateclassdata.utils.InMemoryAppender; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Date: 12/27/15 - 10:46 PM * * @author Jeroen Meulemeester */ public class ImmutableStewTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(); } @AfterEach public void tearDown() { appender.stop(); } /** * Verify if mixing the stew doesn't change the internal state */ @Test public void testMix() { final Stew stew = new Stew(1, 2, 3, 4); final String expectedMessage = "Mixing the stew we find: 1 potatoes, 2 carrots, 3 meat and 4 peppers"; for (int i = 0; i < 20; i++) { stew.mix(); assertEquals(expectedMessage, appender.getLastMessage()); } assertEquals(20, appender.getLogSize()); } /** * Verify if tasting the stew actually removes one of each ingredient */ @Test public void testDrink() { final Stew stew = new Stew(1, 2, 3, 4); stew.mix(); assertEquals("Mixing the stew we find: 1 potatoes, 2 carrots, 3 meat and 4 peppers", appender.getLastMessage()); stew.taste(); assertEquals("Tasting the stew", appender.getLastMessage()); stew.mix(); assertEquals("Mixing the stew we find: 0 potatoes, 1 carrots, 2 meat and 3 peppers", appender.getLastMessage()); } } StewTest.java000066400000000000000000000042131322244523500343120ustar00rootroot00000000000000java-design-patterns-1.18.0/private-class-data/src/test/java/com/iluwatar/privateclassdata/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.privateclassdata; import com.iluwatar.privateclassdata.utils.InMemoryAppender; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Date: 12/27/15 - 10:46 PM * * @author Jeroen Meulemeester */ public class StewTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(); } @AfterEach public void tearDown() { appender.stop(); } /** * Verify if mixing the stew doesn't change the internal state */ @Test public void testMix() { final ImmutableStew stew = new ImmutableStew(1, 2, 3, 4); final String expectedMessage = "Mixing the immutable stew we find: 1 potatoes, " + "2 carrots, 3 meat and 4 peppers"; for (int i = 0; i < 20; i++) { stew.mix(); assertEquals(expectedMessage, appender.getLastMessage()); } assertEquals(20, appender.getLogSize()); } } java-design-patterns-1.18.0/private-class-data/src/test/java/com/iluwatar/privateclassdata/utils/000077500000000000000000000000001322244523500331045ustar00rootroot00000000000000InMemoryAppender.java000066400000000000000000000036161322244523500371140ustar00rootroot00000000000000java-design-patterns-1.18.0/private-class-data/src/test/java/com/iluwatar/privateclassdata/utils/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.privateclassdata.utils; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import org.slf4j.LoggerFactory; import java.util.LinkedList; import java.util.List; /** * InMemory Log Appender Util. */ public class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender() { ((Logger) LoggerFactory.getLogger("root")).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public int getLogSize() { return log.size(); } public String getLastMessage() { return log.get(log.size() - 1).getFormattedMessage(); } } java-design-patterns-1.18.0/producer-consumer/000077500000000000000000000000001322244523500213055ustar00rootroot00000000000000java-design-patterns-1.18.0/producer-consumer/README.md000066400000000000000000000012311322244523500225610ustar00rootroot00000000000000--- layout: pattern title: Producer Consumer folder: producer-consumer permalink: /patterns/producer-consumer/ categories: Concurrency tags: - Java - Difficulty-Intermediate - I/O - Reactive --- ## Intent Producer Consumer Design pattern is a classic concurrency pattern which reduces coupling between Producer and Consumer by separating Identification of work with Execution of Work. ![alt text](./etc/producer-consumer.png "Producer Consumer") ## Applicability Use the Producer Consumer idiom when * decouple system by separate work in two process produce and consume. * addresses the issue of different timing require to produce work or consuming work java-design-patterns-1.18.0/producer-consumer/etc/000077500000000000000000000000001322244523500220605ustar00rootroot00000000000000java-design-patterns-1.18.0/producer-consumer/etc/producer-consumer.png000066400000000000000000000647621322244523500262610ustar00rootroot00000000000000PNG  IHDR\iIDATxXU ( @c%bÂQG#1ر%EQQAD"("?sƨ,XPINvfwuy3g̜YNyg9E3ޢh"(A€)򿞃:W~ N N Jeg'< 3yoOs{9wȚ5U# xŧGԫW*o@DH-޾ػwɓ#u- $ vbҤ ]x2O1xo@!غhe"''%4tk5o׮ŪT[l4ںdÆncBr߾GM?Er1o'$&*-GK^Bpx6eť*]J4xo@!xeނ:r?}T<Ǩy :ӧ7Svlo(45 x 950,/;w.(z7oy pa":ǏZ=yZLDq"CPh8o!zݻ)[eI4]]]TL"cd #Zy8;W yH&?{oXўש:::znZ(˄h2_jeeIi vЈیae'NOfBC(t t!#];hBt °L{R,1xNBF5wUiѢqKޞtӧ I) ?bkkEf(#$AjUa4-o@!غ 3ay[0QPzEPK))ػŋJ1%x `Bs3_׀ayh/L[@ZE-4cBgm ǰm `t#H*I |YSE\ÆnI;0 QY)?՗ A*"DF50Ilj K1ԐebނJI9?8vDٝD6[حMps陷Fޖ.rСTS?^I709 Q/& )ނNۋniwV<ݜQ<59RJ.Ewc԰*8NJyՈUE¯[UxWRF  y С- ]B!},Mr"vx ;[PjccEW^sjpY`do/AhZCb]QD Uq"&fk 'uLD6oތSʏq ͫF`.BBgg W|(޶mAt-..Umœ?iMy#EY;J-8m߾6ɷMyt+ilhЮ %oQryQdL[l2lSkNqreR~Sh^5b)~і {2LŮ^bO:8<<ʢn^.NrlǏ˽OٱcaNVV^NW(Lfԏ;&&&%[FŊ_]Lty 2.߻e8+0Qw"_o.{Ѡ+)o8o[Pq$oY8~|slQz~idoXP8J1NyՈVHPF[ 4hBT 6mlʗӧ5ڤcN4Z{_`BsdkԨܽ{ ^֊–%t虘 ͏[YorVE_ lA/XrŴk׈Ōۛf?'An6 DQi#Kr ڤBFv"K${{[*7ӧ)A.EcBc83h(+X,zw~ǼqF\+ ('a_K=NTKOa'[q7cr';D"^xvĀuD%c(x GNm"_Iٮ[~ZULik~];~~`BƢC, %3+Wqu+^4?F(41i-~і cϕ/=w[P7>b~bԨ&#ct'9h60YͰ<-aiӀ6و )L;D$"HB|:,Ll͏ƟqmIO?>$:HJWŁ ?hKxqO&Kn;i?ܧfeG{.tikkPvXG9=9KFt虪/4A1W3t(^۶ Z'YX7 cނ>b{l4̙-_%JX<fX`3st[@RU#8P?BgsPxCSOӤ; 6)1٧ߩǎAjrb_իW`T ˓-Lw$Uh^5S?\N=;l23k>O EbE4mZk1ܯIU S-s֩L1V}fvV5,OP=x HмjDG,1l3+kItc5m a]CAQw/Q#5B~X=x HмjDo@*y 6\'1Pt n4{+S ^\u+~H- BUB{f׭[#)iBŬRf |R,-,?;gvv֯^SPy_k$ *4[),|oѿrYfu f2c`FzQF^mYTW]P H -bb}QQsgAWAQUsyՈ*Nf!Tz'^[w"f2c ==)Iw'(:x H -^:F Loq={@}>> oj?)3*> OoV3#j >$JqfvjM^L8n-k-<ؓ>[OZ8v,;B| 2o{jAy۶ )ЩSG~ԬY8I0c4pesfKm]D{z}>u׮ŝ;B./޾0thWl\[?t|~)Kt@n4SLll0밅TPӎD= NT#T'[Sca6ғf`j0(Ds HмjDP ͫFt[q0(x Hмj_q0K0.uqvv^jU޽)ԩS={d,HMM_ Rok$JPXw$ m>-4¯8P%tW'&&^tA>^^= --E޻w&***++kSL)PJx@"yZz r,~u%5 0B~t/t#Ԯ[UV,LC17o<'˗/((Hj܂- =իW8|; ̙3c;ݮMk5gJfp0B~t/t#^GU" 'O ѣGY5kuE7oޔRz $Q:H _%P{A j}(e7 W 0Boal_NG(_~T>GBBBǎYYtsscvb...SNAnݺ.OrJET&D}O+}n:ap7gk}$Q[I-&??[מ.ͭx|e{{[j^ݶmêUv}ll26k9*LEF-PXq00)NG]Er.^KoooV>^ZT)*T "sssmmmO>Mᨨ(*o޼RiW8CoW ug'&D$LO`w6[+y^"t[n Q)I+V]-?>Dpv w)ԔyS*@;Y:zO(aJݻRR}j4z .%xŝ; {.5EB:ݪRBR<+|W!,f0i}Xo-8V2eL4☫X]Cx œ&-x H-s玿?a`,Bْ%K:FfCtuF"D0PqUE~n!|XUU P<$UyիW/^xYNNǏ/8q"###==ѣNNNNJJ:p@||}bccwܹcǎm۶EEEm޼922rk׮ [jշ~lٲŋ/X`޼ys̙9s3O>uTj&L0nܸ1cƌ9r_|ӿ}ݻGݻwҥKN:vخ]֭[lٲyM6mԨQ իWvmwwwWW5j899UVr+Vtpp>ҲDE~da!5‡U ]p 3{X쮰JuŊ:TVs *PK0uSL3uISWM6uyhт:r;t@];uSgO]>u +@lѣGQ 0qDd F KAƂC&d>V\IFHxx8Y2(dSȬe!BL Y24dk:tٝcǎ!D6Y"2Fd$U"DSVV)S="kE/:Jaw"$,v,\ҡND U=ݜԘCn-a`~ J0אRRr6n~lw/C'+Ne_Ls/H{NB(1bwʖIIY_wΕcnֻYY -8oo& )NDu˫e^^ P #GZlԻwGI~-YϠ[@l)9?.aӦ%6t;y2Ri9E,q_1Դ%'_n#G֭kOk֬NKhJ r=M[2.lbmۂBC'~I/߯Tҹs^~*/ҪUe˚PB-zb.Vyݽ{ rOo~ѣ{_/:'} /nA\ʟ"22[X;wd|rh&_ݤS%{J-p7)).ݭ[ nʕ+<$'&&vЁ]fgg*ĉcbbƏoC nL,LQ:IElb-+p'Nl@nkd dkX2f2,l*7ƍ3-dB?w+׉+KZP4e)}FNJf#?""?gϟӎ/_Tpx 0π[Y>D7=l w2gA+ڷjrI\<ӧ͸e%.]{ nWf' IwJ2ioI5Ga14& [j5dH1xY5`_x1cXݻwdf-00KKo\_uۛ6ͮU_Rx߾k;)4M.qi8QkĝC/[)-b1 [(ɤ~&UU+DOy&o&E*%3e)L8eՀݺu>>>,SdI[`(^a݉vT&\T\];xa+)qdJ4 66tRl[Nx0E>ƍv[)+&~&UUy]R^,MTJfr@SM uaj͛s\]]է/ +T;B>Q4krZhuϟj\tNwT.q2Dfѱ"{{[Kșt2TMMY19s7T[>`Dd}5MTJf@-kCm=w  ^V X_|G%''S`С3f`G>?  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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.producer.consumer; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; /** * Producer Consumer Design pattern is a classic concurrency or threading pattern which reduces coupling between * Producer and Consumer by separating Identification of work with Execution of Work. *

* In producer consumer design pattern a shared queue is used to control the flow and this separation allows you to code * producer and consumer separately. It also addresses the issue of different timing require to produce item or * consuming item. by using producer consumer pattern both Producer and Consumer Thread can work with different speed. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args * command line args */ public static void main(String[] args) { ItemQueue queue = new ItemQueue(); ExecutorService executorService = Executors.newFixedThreadPool(5); for (int i = 0; i < 2; i++) { final Producer producer = new Producer("Producer_" + i, queue); executorService.submit(() -> { while (true) { producer.produce(); } }); } for (int i = 0; i < 3; i++) { final Consumer consumer = new Consumer("Consumer_" + i, queue); executorService.submit(() -> { while (true) { consumer.consume(); } }); } executorService.shutdown(); try { executorService.awaitTermination(10, TimeUnit.SECONDS); executorService.shutdownNow(); } catch (InterruptedException e) { LOGGER.error("Error waiting for ExecutorService shutdown"); } } } Consumer.java000066400000000000000000000034701322244523500344100ustar00rootroot00000000000000java-design-patterns-1.18.0/producer-consumer/src/main/java/com/iluwatar/producer/consumer/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.producer.consumer; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Class responsible for consume the {@link Item} produced by {@link Producer} */ public class Consumer { private static final Logger LOGGER = LoggerFactory.getLogger(Consumer.class); private final ItemQueue queue; private final String name; public Consumer(String name, ItemQueue queue) { this.name = name; this.queue = queue; } /** * Consume item from the queue */ public void consume() throws InterruptedException { Item item = queue.take(); LOGGER.info("Consumer [{}] consume item [{}] produced by [{}]", name, item.getId(), item.getProducer()); } } java-design-patterns-1.18.0/producer-consumer/src/main/java/com/iluwatar/producer/consumer/Item.java000066400000000000000000000027721322244523500335760ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.producer.consumer; /** * Class take part of an {@link Producer}-{@link Consumer} exchange. */ public class Item { private String producer; private int id; public Item(String producer, int id) { this.id = id; this.producer = producer; } public int getId() { return id; } public String getProducer() { return producer; } } ItemQueue.java000066400000000000000000000031761322244523500345230ustar00rootroot00000000000000java-design-patterns-1.18.0/producer-consumer/src/main/java/com/iluwatar/producer/consumer/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.producer.consumer; import java.util.concurrent.BlockingQueue; import java.util.concurrent.LinkedBlockingQueue; /** * Class as a channel for {@link Producer}-{@link Consumer} exchange. */ public class ItemQueue { private BlockingQueue queue; public ItemQueue() { queue = new LinkedBlockingQueue<>(5); } public void put(Item item) throws InterruptedException { queue.put(item); } public Item take() throws InterruptedException { return queue.take(); } } Producer.java000066400000000000000000000033661322244523500344040ustar00rootroot00000000000000java-design-patterns-1.18.0/producer-consumer/src/main/java/com/iluwatar/producer/consumer/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.producer.consumer; import java.util.Random; /** * Class responsible for producing unit of work that can be expressed as {@link Item} and submitted * to queue */ public class Producer { private final ItemQueue queue; private final String name; private int itemId; public Producer(String name, ItemQueue queue) { this.name = name; this.queue = queue; } /** * Put item in the queue */ public void produce() throws InterruptedException { Item item = new Item(name, itemId++); queue.put(item); Random random = new Random(); Thread.sleep(random.nextInt(2000)); } } java-design-patterns-1.18.0/producer-consumer/src/test/000077500000000000000000000000001322244523500230535ustar00rootroot00000000000000java-design-patterns-1.18.0/producer-consumer/src/test/java/000077500000000000000000000000001322244523500237745ustar00rootroot00000000000000java-design-patterns-1.18.0/producer-consumer/src/test/java/com/000077500000000000000000000000001322244523500245525ustar00rootroot00000000000000java-design-patterns-1.18.0/producer-consumer/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500264025ustar00rootroot00000000000000java-design-patterns-1.18.0/producer-consumer/src/test/java/com/iluwatar/producer/000077500000000000000000000000001322244523500302255ustar00rootroot00000000000000java-design-patterns-1.18.0/producer-consumer/src/test/java/com/iluwatar/producer/consumer/000077500000000000000000000000001322244523500320605ustar00rootroot00000000000000AppTest.java000066400000000000000000000025441322244523500342310ustar00rootroot00000000000000java-design-patterns-1.18.0/producer-consumer/src/test/java/com/iluwatar/producer/consumer/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.producer.consumer; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() throws Exception { String[] args = {}; App.main(args); } } ConsumerTest.java000066400000000000000000000037341322244523500353060ustar00rootroot00000000000000java-design-patterns-1.18.0/producer-consumer/src/test/java/com/iluwatar/producer/consumer/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.producer.consumer; import org.junit.jupiter.api.Test; import static org.mockito.Mockito.reset; import static org.mockito.Mockito.spy; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; /** * Date: 12/27/15 - 11:01 PM * * @author Jeroen Meulemeester */ public class ConsumerTest { private static final int ITEM_COUNT = 5; @Test public void testConsume() throws Exception { final ItemQueue queue = spy(new ItemQueue()); for (int id = 0; id < ITEM_COUNT; id++) { queue.put(new Item("producer", id)); } reset(queue); // Don't count the preparation above as interactions with the queue final Consumer consumer = new Consumer("consumer", queue); for (int id = 0; id < ITEM_COUNT; id++) { consumer.consume(); } verify(queue, times(ITEM_COUNT)).take(); } } ProducerTest.java000066400000000000000000000036341322244523500352750ustar00rootroot00000000000000java-design-patterns-1.18.0/producer-consumer/src/test/java/com/iluwatar/producer/consumer/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.producer.consumer; import org.junit.jupiter.api.Test; import static java.time.Duration.ofMillis; import static org.junit.jupiter.api.Assertions.assertTimeout; import static org.mockito.Matchers.any; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/28/15 - 12:12 AM * * @author Jeroen Meulemeester */ public class ProducerTest { @Test public void testProduce() throws Exception { assertTimeout(ofMillis(6000), () -> { final ItemQueue queue = mock(ItemQueue.class); final Producer producer = new Producer("producer", queue); producer.produce(); verify(queue).put(any(Item.class)); verifyNoMoreInteractions(queue); }); } }java-design-patterns-1.18.0/promise/000077500000000000000000000000001322244523500173075ustar00rootroot00000000000000java-design-patterns-1.18.0/promise/README.md000066400000000000000000000026571322244523500206000ustar00rootroot00000000000000--- layout: pattern title: Promise folder: promise permalink: /patterns/promise/ categories: Concurrency tags: - Java - Functional - Reactive - Difficulty-Intermediate --- ## Also known as CompletableFuture ## Intent A Promise represents a proxy for a value not necessarily known when the promise is created. It allows you to associate dependent promises to an asynchronous action's eventual success value or failure reason. Promises are a way to write async code that still appears as though it is executing in a synchronous way. ![alt text](./etc/promise.png "Promise") ## Applicability Promise pattern is applicable in concurrent programming when some work needs to be done asynchronously and: * code maintainability and readability suffers due to callback hell. * you need to compose promises and need better error handling for asynchronous tasks. * you want to use functional style of programming. ## Real world examples * [java.util.concurrent.CompletableFuture](https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CompletableFuture.html) * [Guava ListenableFuture](https://github.com/google/guava/wiki/ListenableFutureExplained) ## Related Patterns * Async Method Invocation * Callback ## Credits * [You are missing the point to Promises](https://gist.github.com/domenic/3889970) * [Functional style callbacks using CompletableFuture](https://www.infoq.com/articles/Functional-Style-Callbacks-Using-CompletableFuture) java-design-patterns-1.18.0/promise/etc/000077500000000000000000000000001322244523500200625ustar00rootroot00000000000000java-design-patterns-1.18.0/promise/etc/promise.png000066400000000000000000001635121322244523500222560ustar00rootroot00000000000000PNG  IHDR|ndQIDATx Xe->+KS>L\24bP9Ȧ"  " n (.⾁* ZW_,Kq?| 빸ywރr|9g޼ =7lQãXXiP:tYQSt%nagkk2j9رvBwڼjf&&:YY1nn-Z4:4(frj'?ɓffz..Cg 4HPW(?M"߹sǥ 32I>H}m?d7^O'A^:XֱcJwm)/ c>:nocȑUYS;wU=;!ڹbƓR石ha4GGKт2N(E+NA\t8XYlժ+{s]üygwP(%]I'&)tt/Æ `9KPh/n_pn,qd,!R>B|,33,sX'*\޽Ԉ tMI tvy2)kkwz5Oay5ʜΒN:#"{JOR3'{ 5J~ c??>}>YbH' "uHDf(qtLNM#$7-XP}1=??ehbɓGm^(|D\ÇGMHʫP:RPT"' <`q6l3U@:hIC2sv޽ 9\EN]SFP_~mڴIFF0vxt޹s[;9q/rP??'Aҩp/.a>dgʏս$QR>NDJTt PHR>@:U% "ҩ*@$NU H'"|R?l_ݳ&6eW:R>Գt_"＄#,M nu"H'"|O$4z!7gn jSʆ-(Xw|ffzM6y-޽{Ef5!3(ECIo_5~;ebZ#-3XZld^^k3'O^$32WKsر#쉣lx!H' JPoҹ2tمkd{?Vxe(NHKg@+(IFHgQ;8سkWMv*ظNeP#(hfxZӻw-iwmլYӴq7'Lek'Ov~۷n]un3f8~VH'JPo=iLLlϱE;)tN:…,WU'N%ev /Fxz̦Mښg4u>~| 5[mCC'YiXZkӧG;vl};u m"藖B:PPzN-Y2tZ ̍߰E;ۤoNi:`v` Wסl_ZOsx 2H;~i(LJJJ Kywm`;|3n]l;N`{tL:?NLȑ%%)/#!!l䠠جY͛5mڄ'O3lE<~%kԇS7~?UhC.]@}@)M:NLa}l[CmPxܒ+iLcIKL:٧9)RRiq ʳ{w;;M4vtԛt7 Jx@zNJ2ܲi2ɃcN7xC_㒒dҥ=-Z4p*WסyG֭ 22^+H~I^=eBB< ׮]xA:(EC}>3}.C7N]txsVZT(11·jE-I͚5eOД #%ݵe::Xpoƍ͛7kҤˬt PzF"2KWۍs<~{(#m@$|ǼrL?W-)w& "/ "ҩ*@$NU H'"|tJ@: (ESU H@) NDJZ377~ֈ1fz`}R>ʙΟ~%E[:>-irb/ "J'aB7us2|9_O^ͣ+W|Lܶi[jߟ:TWGQQ2SF:++ )o߸Q8fŔ)#hےh`!JKSe::!qq5=4nGeF&@M@)A:ϝQXXdNN䗒HOf2ɉg'Jgtz;|VK$NN6L6 5{x2;䗴5hҥ8|xhѸA:PPz˗s&Mq2"SaPsQKER$jԚ&.^<W*5I'kx{60vx)SFȌ@@)A:gn' M ;ylNm,22ۭZ@.?gʤ3.·%ʊ9}zC|c՗e4Q̎\vV}f͢KȌM R>ԃtěN6ROǕ+{7m k{SU΀R# V9;gΙ1YQuqp(1c,޹s֭YMd?b]2(YfGI99Y2ѣeF&@M@)^tY )uۘR>>@:U% "ҩ*@$,jPF8ө"@$NU H'"|tJ@: (ESU H@) NDJTt PIcZR㯿J s6.o;nW2L 8A)D+Sccgb{]]+tA)j9YF fr20ihgOÇGǏ042ҎyyÇzxښei&p;mҿ58K{cvwb++#{ZU=9K$ffzAA?3Ɍ_IFEMG7~Si@:!(EC iٹg֬*M-t͍'C?g0]ȌJC ځ<(}Ef2qh66}Y,ԩ SS]da۶o,"0ೂ1-:~||#?~m&I aР>Ԡ1ϟ%4 "AtwGyXE41:ڋ[|X@ ;تU+WHQ%9))ݧ`DOy}JB`AZl~ny?|x:]Gu 6wVL6! 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.promise; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.Map; import java.util.concurrent.CompletableFuture; import java.util.concurrent.CountDownLatch; import java.util.concurrent.ExecutionException; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; /** * * The Promise object is used for asynchronous computations. A Promise represents an operation * that hasn't completed yet, but is expected in the future. * *

A Promise represents a proxy for a value not necessarily known when the promise is created. It * allows you to associate dependent promises to an asynchronous action's eventual success value or * failure reason. This lets asynchronous methods return values like synchronous methods: instead * of the final value, the asynchronous method returns a promise of having a value at some point * in the future. * *

Promises provide a few advantages over callback objects: *

    *
  • Functional composition and error handling *
  • Prevents callback hell and provides callback aggregation *
* *

* In this application the usage of promise is demonstrated with two examples: *

    *
  • Count Lines: In this example a file is downloaded and its line count is calculated. * The calculated line count is then consumed and printed on console. *
  • Lowest Character Frequency: In this example a file is downloaded and its lowest frequency * character is found and printed on console. This happens via a chain of promises, we start with * a file download promise, then a promise of character frequency, then a promise of lowest frequency * character which is finally consumed and result is printed on console. *
* * @see CompletableFuture */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); private static final String DEFAULT_URL = "https://raw.githubusercontent.com/iluwatar/java-design-patterns/master/promise/README.md"; private final ExecutorService executor; private final CountDownLatch stopLatch; private App() { executor = Executors.newFixedThreadPool(2); stopLatch = new CountDownLatch(2); } /** * Program entry point * @param args arguments * @throws InterruptedException if main thread is interrupted. * @throws ExecutionException if an execution error occurs. */ public static void main(String[] args) throws InterruptedException, ExecutionException { App app = new App(); try { app.promiseUsage(); } finally { app.stop(); } } private void promiseUsage() { calculateLineCount(); calculateLowestFrequencyChar(); } /* * Calculate the lowest frequency character and when that promise is fulfilled, * consume the result in a Consumer */ private void calculateLowestFrequencyChar() { lowestFrequencyChar() .thenAccept( charFrequency -> { LOGGER.info("Char with lowest frequency is: {}", charFrequency); taskCompleted(); } ); } /* * Calculate the line count and when that promise is fulfilled, consume the result * in a Consumer */ private void calculateLineCount() { countLines() .thenAccept( count -> { LOGGER.info("Line count is: {}", count); taskCompleted(); } ); } /* * Calculate the character frequency of a file and when that promise is fulfilled, * then promise to apply function to calculate lowest character frequency. */ private Promise lowestFrequencyChar() { return characterFrequency() .thenApply(Utility::lowestFrequencyChar); } /* * Download the file at DEFAULT_URL and when that promise is fulfilled, * then promise to apply function to calculate character frequency. */ private Promise> characterFrequency() { return download(DEFAULT_URL) .thenApply(Utility::characterFrequency); } /* * Download the file at DEFAULT_URL and when that promise is fulfilled, * then promise to apply function to count lines in that file. */ private Promise countLines() { return download(DEFAULT_URL) .thenApply(Utility::countLines); } /* * Return a promise to provide the local absolute path of the file downloaded in background. * This is an async method and does not wait until the file is downloaded. */ private Promise download(String urlString) { Promise downloadPromise = new Promise() .fulfillInAsync( () -> { return Utility.downloadFile(urlString); }, executor) .onError( throwable -> { throwable.printStackTrace(); taskCompleted(); } ); return downloadPromise; } private void stop() throws InterruptedException { stopLatch.await(); executor.shutdownNow(); } private void taskCompleted() { stopLatch.countDown(); } } java-design-patterns-1.18.0/promise/src/main/java/com/iluwatar/promise/Promise.java000066400000000000000000000142721322244523500303160ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.promise; import java.util.concurrent.Callable; import java.util.concurrent.ExecutionException; import java.util.concurrent.Executor; import java.util.function.Consumer; import java.util.function.Function; /** * A Promise represents a proxy for a value not necessarily known when the promise is created. It * allows you to associate dependent promises to an asynchronous action's eventual success value or * failure reason. This lets asynchronous methods return values like synchronous methods: instead * of the final value, the asynchronous method returns a promise of having a value at some point * in the future. * * @param type of result. */ public class Promise extends PromiseSupport { private Runnable fulfillmentAction; private Consumer exceptionHandler; /** * Creates a promise that will be fulfilled in future. */ public Promise() { } /** * Fulfills the promise with the provided value. * @param value the fulfilled value that can be accessed using {@link #get()}. */ @Override public void fulfill(T value) { super.fulfill(value); postFulfillment(); } /** * Fulfills the promise with exception due to error in execution. * @param exception the exception will be wrapped in {@link ExecutionException} * when accessing the value using {@link #get()}. */ @Override public void fulfillExceptionally(Exception exception) { super.fulfillExceptionally(exception); handleException(exception); postFulfillment(); } private void handleException(Exception exception) { if (exceptionHandler == null) { return; } exceptionHandler.accept(exception); } private void postFulfillment() { if (fulfillmentAction == null) { return; } fulfillmentAction.run(); } /** * Executes the task using the executor in other thread and fulfills the promise returned * once the task completes either successfully or with an exception. * * @param task the task that will provide the value to fulfill the promise. * @param executor the executor in which the task should be run. * @return a promise that represents the result of running the task provided. */ public Promise fulfillInAsync(final Callable task, Executor executor) { executor.execute(() -> { try { fulfill(task.call()); } catch (Exception ex) { fulfillExceptionally(ex); } }); return this; } /** * Returns a new promise that, when this promise is fulfilled normally, is fulfilled with * result of this promise as argument to the action provided. * @param action action to be executed. * @return a new promise. */ public Promise thenAccept(Consumer action) { Promise dest = new Promise<>(); fulfillmentAction = new ConsumeAction(this, dest, action); return dest; } /** * Set the exception handler on this promise. * @param exceptionHandler a consumer that will handle the exception occurred while fulfilling * the promise. * @return this */ public Promise onError(Consumer exceptionHandler) { this.exceptionHandler = exceptionHandler; return this; } /** * Returns a new promise that, when this promise is fulfilled normally, is fulfilled with * result of this promise as argument to the function provided. * @param func function to be executed. * @return a new promise. */ public Promise thenApply(Function func) { Promise dest = new Promise<>(); fulfillmentAction = new TransformAction(this, dest, func); return dest; } /** * Accesses the value from source promise and calls the consumer, then fulfills the * destination promise. */ private class ConsumeAction implements Runnable { private final Promise src; private final Promise dest; private final Consumer action; private ConsumeAction(Promise src, Promise dest, Consumer action) { this.src = src; this.dest = dest; this.action = action; } @Override public void run() { try { action.accept(src.get()); dest.fulfill(null); } catch (Throwable throwable) { dest.fulfillExceptionally((Exception) throwable.getCause()); } } } /** * Accesses the value from source promise, then fulfills the destination promise using the * transformed value. The source value is transformed using the transformation function. */ private class TransformAction implements Runnable { private final Promise src; private final Promise dest; private final Function func; private TransformAction(Promise src, Promise dest, Function func) { this.src = src; this.dest = dest; this.func = func; } @Override public void run() { try { dest.fulfill(func.apply(src.get())); } catch (Throwable throwable) { dest.fulfillExceptionally((Exception) throwable.getCause()); } } } }java-design-patterns-1.18.0/promise/src/main/java/com/iluwatar/promise/PromiseSupport.java000066400000000000000000000063461322244523500317160ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.promise; import java.util.concurrent.ExecutionException; import java.util.concurrent.Future; import java.util.concurrent.TimeUnit; import java.util.concurrent.TimeoutException; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * A really simplified implementation of future that allows completing it successfully with a value * or exceptionally with an exception. */ class PromiseSupport implements Future { private static final Logger LOGGER = LoggerFactory.getLogger(PromiseSupport.class); private static final int RUNNING = 1; private static final int FAILED = 2; private static final int COMPLETED = 3; private final Object lock; private volatile int state = RUNNING; private T value; private Exception exception; PromiseSupport() { this.lock = new Object(); } void fulfill(T value) { this.value = value; this.state = COMPLETED; synchronized (lock) { lock.notifyAll(); } } void fulfillExceptionally(Exception exception) { this.exception = exception; this.state = FAILED; synchronized (lock) { lock.notifyAll(); } } @Override public boolean cancel(boolean mayInterruptIfRunning) { return false; } @Override public boolean isCancelled() { return false; } @Override public boolean isDone() { return state > RUNNING; } @Override public T get() throws InterruptedException, ExecutionException { synchronized (lock) { while (state == RUNNING) { lock.wait(); } } if (state == COMPLETED) { return value; } throw new ExecutionException(exception); } @Override public T get(long timeout, TimeUnit unit) throws ExecutionException, TimeoutException { synchronized (lock) { while (state == RUNNING) { try { lock.wait(unit.toMillis(timeout)); } catch (InterruptedException e) { LOGGER.warn("Interrupted!", e); Thread.currentThread().interrupt(); } } } if (state == COMPLETED) { return value; } throw new ExecutionException(exception); } }java-design-patterns-1.18.0/promise/src/main/java/com/iluwatar/promise/Utility.java000066400000000000000000000112301322244523500303320ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.promise; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.io.InputStreamReader; import java.io.Reader; import java.net.MalformedURLException; import java.net.URL; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.Map.Entry; /** * Utility to perform various operations */ public class Utility { private static final Logger LOGGER = LoggerFactory.getLogger(Utility.class); /** * Calculates character frequency of the file provided. * @param fileLocation location of the file. * @return a map of character to its frequency, an empty map if file does not exist. */ public static Map characterFrequency(String fileLocation) { Map characterToFrequency = new HashMap<>(); try (Reader reader = new FileReader(fileLocation); BufferedReader bufferedReader = new BufferedReader(reader)) { for (String line; (line = bufferedReader.readLine()) != null;) { for (char c : line.toCharArray()) { if (!characterToFrequency.containsKey(c)) { characterToFrequency.put(c, 1); } else { characterToFrequency.put(c, characterToFrequency.get(c) + 1); } } } } catch (IOException ex) { ex.printStackTrace(); } return characterToFrequency; } /** * @return the character with lowest frequency if it exists, {@code Optional.empty()} otherwise. */ public static Character lowestFrequencyChar(Map charFrequency) { Character lowestFrequencyChar = null; Iterator> iterator = charFrequency.entrySet().iterator(); Entry entry = iterator.next(); int minFrequency = entry.getValue(); lowestFrequencyChar = entry.getKey(); while (iterator.hasNext()) { entry = iterator.next(); if (entry.getValue() < minFrequency) { minFrequency = entry.getValue(); lowestFrequencyChar = entry.getKey(); } } return lowestFrequencyChar; } /** * @return number of lines in the file at provided location. 0 if file does not exist. */ public static Integer countLines(String fileLocation) { int lineCount = 0; try (Reader reader = new FileReader(fileLocation); BufferedReader bufferedReader = new BufferedReader(reader)) { while (bufferedReader.readLine() != null) { lineCount++; } } catch (IOException ex) { ex.printStackTrace(); } return lineCount; } /** * Downloads the contents from the given urlString, and stores it in a temporary directory. * @return the absolute path of the file downloaded. */ public static String downloadFile(String urlString) throws MalformedURLException, IOException { LOGGER.info("Downloading contents from url: {}", urlString); URL url = new URL(urlString); File file = File.createTempFile("promise_pattern", null); try (Reader reader = new InputStreamReader(url.openStream()); BufferedReader bufferedReader = new BufferedReader(reader); FileWriter writer = new FileWriter(file)) { for (String line; (line = bufferedReader.readLine()) != null; ) { writer.write(line); writer.write("\n"); } LOGGER.info("File downloaded at: {}", file.getAbsolutePath()); return file.getAbsolutePath(); } catch (IOException ex) { throw ex; } } } java-design-patterns-1.18.0/promise/src/test/000077500000000000000000000000001322244523500210555ustar00rootroot00000000000000java-design-patterns-1.18.0/promise/src/test/java/000077500000000000000000000000001322244523500217765ustar00rootroot00000000000000java-design-patterns-1.18.0/promise/src/test/java/com/000077500000000000000000000000001322244523500225545ustar00rootroot00000000000000java-design-patterns-1.18.0/promise/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500244045ustar00rootroot00000000000000java-design-patterns-1.18.0/promise/src/test/java/com/iluwatar/promise/000077500000000000000000000000001322244523500260625ustar00rootroot00000000000000java-design-patterns-1.18.0/promise/src/test/java/com/iluwatar/promise/AppTest.java000066400000000000000000000026221322244523500303070ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.promise; import org.junit.jupiter.api.Test; import java.util.concurrent.ExecutionException; /** * * Application test. */ public class AppTest { @Test public void testApp() throws InterruptedException, ExecutionException { App.main(null); } } java-design-patterns-1.18.0/promise/src/test/java/com/iluwatar/promise/PromiseTest.java000066400000000000000000000212121322244523500312010ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.promise; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import java.util.concurrent.Callable; import java.util.concurrent.ExecutionException; import java.util.concurrent.Executor; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; import java.util.concurrent.TimeoutException; import java.util.function.Consumer; import java.util.function.Function; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertTrue; import static org.junit.jupiter.api.Assertions.fail; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; /** * Tests Promise class. */ public class PromiseTest { private Executor executor; private Promise promise; @BeforeEach public void setUp() { executor = Executors.newSingleThreadExecutor(); promise = new Promise<>(); } @Test public void promiseIsFulfilledWithTheResultantValueOfExecutingTheTask() throws InterruptedException, ExecutionException { promise.fulfillInAsync(new NumberCrunchingTask(), executor); assertEquals(NumberCrunchingTask.CRUNCHED_NUMBER, promise.get()); assertTrue(promise.isDone()); assertFalse(promise.isCancelled()); } @Test public void promiseIsFulfilledWithAnExceptionIfTaskThrowsAnException() throws InterruptedException, ExecutionException, TimeoutException { testWaitingForeverForPromiseToBeFulfilled(); testWaitingSomeTimeForPromiseToBeFulfilled(); } private void testWaitingForeverForPromiseToBeFulfilled() throws InterruptedException, TimeoutException { Promise promise = new Promise<>(); promise.fulfillInAsync(new Callable() { @Override public Integer call() throws Exception { throw new RuntimeException("Barf!"); } }, executor); try { promise.get(); fail("Fetching promise should result in exception if the task threw an exception"); } catch (ExecutionException ex) { assertTrue(promise.isDone()); assertFalse(promise.isCancelled()); } try { promise.get(1000, TimeUnit.SECONDS); fail("Fetching promise should result in exception if the task threw an exception"); } catch (ExecutionException ex) { assertTrue(promise.isDone()); assertFalse(promise.isCancelled()); } } private void testWaitingSomeTimeForPromiseToBeFulfilled() throws InterruptedException, TimeoutException { Promise promise = new Promise<>(); promise.fulfillInAsync(new Callable() { @Override public Integer call() throws Exception { throw new RuntimeException("Barf!"); } }, executor); try { promise.get(1000, TimeUnit.SECONDS); fail("Fetching promise should result in exception if the task threw an exception"); } catch (ExecutionException ex) { assertTrue(promise.isDone()); assertFalse(promise.isCancelled()); } try { promise.get(); fail("Fetching promise should result in exception if the task threw an exception"); } catch (ExecutionException ex) { assertTrue(promise.isDone()); assertFalse(promise.isCancelled()); } } @Test public void dependentPromiseIsFulfilledAfterTheConsumerConsumesTheResultOfThisPromise() throws InterruptedException, ExecutionException { Promise dependentPromise = promise .fulfillInAsync(new NumberCrunchingTask(), executor) .thenAccept(value -> { assertEquals(NumberCrunchingTask.CRUNCHED_NUMBER, value); }); dependentPromise.get(); assertTrue(dependentPromise.isDone()); assertFalse(dependentPromise.isCancelled()); } @Test public void dependentPromiseIsFulfilledWithAnExceptionIfConsumerThrowsAnException() throws InterruptedException, ExecutionException, TimeoutException { Promise dependentPromise = promise .fulfillInAsync(new NumberCrunchingTask(), executor) .thenAccept(new Consumer() { @Override public void accept(Integer value) { throw new RuntimeException("Barf!"); } }); try { dependentPromise.get(); fail("Fetching dependent promise should result in exception " + "if the action threw an exception"); } catch (ExecutionException ex) { assertTrue(promise.isDone()); assertFalse(promise.isCancelled()); } try { dependentPromise.get(1000, TimeUnit.SECONDS); fail("Fetching dependent promise should result in exception " + "if the action threw an exception"); } catch (ExecutionException ex) { assertTrue(promise.isDone()); assertFalse(promise.isCancelled()); } } @Test public void dependentPromiseIsFulfilledAfterTheFunctionTransformsTheResultOfThisPromise() throws InterruptedException, ExecutionException { Promise dependentPromise = promise .fulfillInAsync(new NumberCrunchingTask(), executor) .thenApply(value -> { assertEquals(NumberCrunchingTask.CRUNCHED_NUMBER, value); return String.valueOf(value); }); assertEquals(String.valueOf(NumberCrunchingTask.CRUNCHED_NUMBER), dependentPromise.get()); assertTrue(dependentPromise.isDone()); assertFalse(dependentPromise.isCancelled()); } @Test public void dependentPromiseIsFulfilledWithAnExceptionIfTheFunctionThrowsException() throws InterruptedException, ExecutionException, TimeoutException { Promise dependentPromise = promise .fulfillInAsync(new NumberCrunchingTask(), executor) .thenApply(new Function() { @Override public String apply(Integer value) { throw new RuntimeException("Barf!"); } }); try { dependentPromise.get(); fail("Fetching dependent promise should result in exception " + "if the function threw an exception"); } catch (ExecutionException ex) { assertTrue(promise.isDone()); assertFalse(promise.isCancelled()); } try { dependentPromise.get(1000, TimeUnit.SECONDS); fail("Fetching dependent promise should result in exception " + "if the function threw an exception"); } catch (ExecutionException ex) { assertTrue(promise.isDone()); assertFalse(promise.isCancelled()); } } @Test public void fetchingAnAlreadyFulfilledPromiseReturnsTheFulfilledValueImmediately() throws InterruptedException, ExecutionException, TimeoutException { Promise promise = new Promise<>(); promise.fulfill(NumberCrunchingTask.CRUNCHED_NUMBER); promise.get(1000, TimeUnit.SECONDS); } @SuppressWarnings("unchecked") @Test public void exceptionHandlerIsCalledWhenPromiseIsFulfilledExceptionally() { Promise promise = new Promise<>(); Consumer exceptionHandler = mock(Consumer.class); promise.onError(exceptionHandler); Exception exception = new Exception("barf!"); promise.fulfillExceptionally(exception); verify(exceptionHandler).accept(eq(exception)); } private static class NumberCrunchingTask implements Callable { private static final Integer CRUNCHED_NUMBER = Integer.MAX_VALUE; @Override public Integer call() throws Exception { // Do number crunching Thread.sleep(100); return CRUNCHED_NUMBER; } } } java-design-patterns-1.18.0/property/000077500000000000000000000000001322244523500175155ustar00rootroot00000000000000java-design-patterns-1.18.0/property/README.md000066400000000000000000000011031322244523500207670ustar00rootroot00000000000000--- layout: pattern title: Property folder: property permalink: /patterns/property/ categories: Creational tags: - Java - Difficulty-Beginner --- ## Intent Create hierarchy of objects and new objects using already existing objects as parents. ![alt text](./etc/property.png "Property") ## Applicability Use the Property pattern when * when you like to have objects with dynamic set of fields and prototype inheritance ## Real world examples * [JavaScript](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Inheritance_and_the_prototype_chain) prototype inheritance java-design-patterns-1.18.0/property/etc/000077500000000000000000000000001322244523500202705ustar00rootroot00000000000000java-design-patterns-1.18.0/property/etc/property.png000066400000000000000000000470601322244523500226710ustar00rootroot00000000000000PNG  IHDRzMIDATx}{fU}6M?OҤֶNcTB3iT#V;Jˠ/B\  ŞP Z.oUglMO֏s9iIq[}[{_okߟu}"A b@ C 3Z8 ,=!<ZIr!G?Nu <` y@iF\75W y1=qChBC>hz_mFp>a=$[[#<9\ߵ@^CH^0wY?eԅWrHJFZ7XٱVe8pffcsQ!k7搧ZT.P!1P-=n!e:1ƚ|A7uUNrҍO_O\Ow2[3YH^k|;'.ݱ?/dlgH=v5Ly^-|odu5h1 yp`Jw_ul7o|=[O:+.Qd֋]*7n:巜7Ho'X:<ԕWr]˶,2_6+LGX$Gt~GiR.I>(Q `9t`Wza̷}/]56񮱒<4):y|h0cEWce[\?+%=.f-+ck?sos]~x_{ѭ=f~|/XC. ezvw{׎7WQ*`]}z!(c!mዷWc?7ؿl>xNK|%_(zW@ O  2褒A1PSS$+|ge9clk Vz;u֭{#oa1AL<@$6 yH0m@<`ڀ y@i$8%/Xϱ߽ t7ԃW@7 QAbIj]-%vVjܟG~9\,c 9gll{H\nH7W+[N^&ծVK|#䁫p;Ç<Oq,Q=Af^SŏR?r%PVo>rA5;%4HF]&2=[&psA!ig/yj4\$Vfٗb翱soz}gV=_ **m#\&l;p䁫p|InPu+QqQ8{(_+DǘjPCMad ӠH W3|r!6of<)|%i˩^&\+M,C yj,\muyԏ& )~V֒(OHdWFe%P,|~i+2#pI䁫p;h5̯7V[Ks|E5sl#[ș[$5eBx0$\a|܊v^ y.F'}$o W$ H L<@$6h۱9 ,=1Cx [$6 yH0m8J^O1,Iηzu3' >D"y`.\b;Uu@;4g"@f!YphoN<Բ.U->~G>kKoq)tIM[ٍ ]C|`> 9ZIwi@K_**S_E8S\%_>zo^e [rK4Ɋ*jUN/ $ r\/J~ Y ?iaDwOiI 9:U/uq+ =hNV hB{]^Ֆlj]Jܪ}Mυ&=]4d̓LdDŽ^ wxa)*I 7%g 4Z,yY2ozRމjQ9"_WMϩѣ籼,Fv*K^~ri/˜k<\k %oLJ^wy2$ wAwwiv#gm&$Tj(M!K^R'yՃ( |RRvEцr՜CȒ'VI lr-%7'(Y6Ws֋Z$0X?tD  Wɫ9C֗}i]\詤w TG6Z.s^$Cvzxs`ӆ5qEΐicWu(!F8Y׉$i_!ĖC7<U%/9~/oW>-x9EY6D&yԨl =\t} gVFw`Bz\>s/[Gɫ슬qu<b6ziTzJVJ˙7~%A#);rDEޟsϾ.lmg6cUYd6B İK%O+FZ$϶yb "YzNBPRY3I%9.80(yW<7*q'W5ʥ JSBʵ.e[?D%璘߸oz؟lִ4ߣL@E[-CVɍ>r_o{p?Õ_'[)$s곩bڂ虼v&$3.yt'Z(ywpKO->RLִ%FM=df<<Ϙ 1ruٟ~'nϯc O5SVmᫌr]Z&4I|S.y'MfmڪMP-l !5eb9Q<+y WɃ+L}1&K^OpE yPE;z+Z\sR>GWo@^U OVLWE'WdX E5F486Y GH0mkL W]<˕fV9 V!Ƀ+2׏+MBFVk![hU0pDB L?h^苃Ya&xI %+Ƞf^KE} Z G%AaB zAA}[C7Nl ~[ԯFGe5" "xzn]hOs9%]\&L*aqkE`V!Xɛ+r;x^w~H&[cK'~7s'V!Lɛ+|)MVRZ!|qe֗P WdL9{hܻmPҦ2YaX G%oҮ"٪LHq 4Gcl z8gv2K7i"k}V4U:E6Jg@حTD{+}BJ޴]VZ*?1<~ڟ겭 8gH0i"SU7R5DQzpΐ<`4(yɔ]閷tT\YY4V󓮪{s猺<`<)yd]u |ҡ8*7:a4yDAV"knf-\`%o2婐ժI&h{k9A]9~ypE yC}j (@>Wtra+\mF(B51 :ok +Pk =\<)xNL|_){)CiU򪰻"g#aG3ӗt#]-1m/eH0m3"mȒynߖɔ#<"-*y \e ` M$ϒg/n;O/($@k8J^ +YoE?C]^5\Q rDm:}bAcɳ"r$蹼~$WɫhjDUJ(LxPBxH-LK+4$i&ƃs@pȺɰ7OA 9 y8J^ +r  U`bŔM%Xҍ/\g c&ƃs/yEKw c KY9XHCv+[xdç41#x܌Ir 4DcKȎ% W+ɛqVDWЙr 4Fɳ1"@srEֹ-ըW+jlW677/.@s@J+LΞH%Vlew9P\:J5Q@H.@c@J^⊬ ³&y={Gp9S+2-V)$<{e#[l?-me $o%xnp<"Jp7(2F\%3$O苞1ޠ>Xʨ+3c+7[vE&]Υw"8$ԟ]ej)} n  Wɫlb! 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.property; import com.iluwatar.property.Character.Type; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * The Property pattern is also known as Prototype inheritance. *

* In prototype inheritance instead of classes, as opposite to Java class inheritance, objects are * used to create another objects and object hierarchies. Hierarchies are created using prototype * chain through delegation: every object has link to parent object. Any base (parent) object can be * amended at runtime (by adding or removal of some property), and all child objects will be * affected as result. *

* In this example we demonstrate {@link Character} instantiation using the Property pattern. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args command line args */ public static void main(String[] args) { /* set up */ Prototype charProto = new Character(); charProto.set(Stats.STRENGTH, 10); charProto.set(Stats.AGILITY, 10); charProto.set(Stats.ARMOR, 10); charProto.set(Stats.ATTACK_POWER, 10); Character mageProto = new Character(Type.MAGE, charProto); mageProto.set(Stats.INTELLECT, 15); mageProto.set(Stats.SPIRIT, 10); Character warProto = new Character(Type.WARRIOR, charProto); warProto.set(Stats.RAGE, 15); warProto.set(Stats.ARMOR, 15); // boost default armor for warrior Character rogueProto = new Character(Type.ROGUE, charProto); rogueProto.set(Stats.ENERGY, 15); rogueProto.set(Stats.AGILITY, 15); // boost default agility for rogue /* usage */ Character mag = new Character("Player_1", mageProto); mag.set(Stats.ARMOR, 8); LOGGER.info(mag.toString()); Character warrior = new Character("Player_2", warProto); LOGGER.info(warrior.toString()); Character rogue = new Character("Player_3", rogueProto); LOGGER.info(rogue.toString()); Character rogueDouble = new Character("Player_4", rogue); rogueDouble.set(Stats.ATTACK_POWER, 12); LOGGER.info(rogueDouble.toString()); } } java-design-patterns-1.18.0/property/src/main/java/com/iluwatar/property/Character.java000066400000000000000000000066621322244523500312140ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.property; import java.util.HashMap; import java.util.Map; /** * Represents Character in game and his abilities (base stats). */ public class Character implements Prototype { /** * Enumeration of Character types */ public enum Type { WARRIOR, MAGE, ROGUE } private final Prototype prototype; private final Map properties = new HashMap<>(); private String name; private Type type; /** * Constructor */ public Character() { this.prototype = new Prototype() { // Null-value object @Override public Integer get(Stats stat) { return null; } @Override public boolean has(Stats stat) { return false; } @Override public void set(Stats stat, Integer val) {} @Override public void remove(Stats stat) {} }; } public Character(Type type, Prototype prototype) { this.type = type; this.prototype = prototype; } /** * Constructor */ public Character(String name, Character prototype) { this.name = name; this.type = prototype.type; this.prototype = prototype; } public String name() { return name; } public Type type() { return type; } @Override public Integer get(Stats stat) { boolean containsValue = properties.containsKey(stat); if (containsValue) { return properties.get(stat); } else { return prototype.get(stat); } } @Override public boolean has(Stats stat) { return get(stat) != null; } @Override public void set(Stats stat, Integer val) { properties.put(stat, val); } @Override public void remove(Stats stat) { properties.put(stat, null); } @Override public String toString() { StringBuilder builder = new StringBuilder(); if (name != null) { builder.append("Player: ").append(name).append('\n'); } if (type != null) { builder.append("Character type: ").append(type.name()).append('\n'); } builder.append("Stats:\n"); for (Stats stat : Stats.values()) { Integer value = this.get(stat); if (value == null) { continue; } builder.append(" - ").append(stat.name()).append(':').append(value).append('\n'); } return builder.toString(); } } java-design-patterns-1.18.0/property/src/main/java/com/iluwatar/property/Prototype.java000066400000000000000000000025411322244523500313150ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.property; /** * Interface for prototype inheritance */ public interface Prototype { Integer get(Stats stat); boolean has(Stats stat); void set(Stats stat, Integer val); void remove(Stats stat); } java-design-patterns-1.18.0/property/src/main/java/com/iluwatar/property/Stats.java000066400000000000000000000024651322244523500304130ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.property; /** * All possible attributes that Character can have */ public enum Stats { AGILITY, STRENGTH, ATTACK_POWER, ARMOR, INTELLECT, SPIRIT, ENERGY, RAGE } java-design-patterns-1.18.0/property/src/test/000077500000000000000000000000001322244523500212635ustar00rootroot00000000000000java-design-patterns-1.18.0/property/src/test/java/000077500000000000000000000000001322244523500222045ustar00rootroot00000000000000java-design-patterns-1.18.0/property/src/test/java/com/000077500000000000000000000000001322244523500227625ustar00rootroot00000000000000java-design-patterns-1.18.0/property/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500246125ustar00rootroot00000000000000java-design-patterns-1.18.0/property/src/test/java/com/iluwatar/property/000077500000000000000000000000001322244523500264765ustar00rootroot00000000000000java-design-patterns-1.18.0/property/src/test/java/com/iluwatar/property/AppTest.java000066400000000000000000000025111322244523500307200ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.property; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/property/src/test/java/com/iluwatar/property/CharacterTest.java000066400000000000000000000102751322244523500321020ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.property; import org.junit.jupiter.api.Test; import static com.iluwatar.property.Character.Type; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertNull; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Date: 12/28/15 - 7:46 PM * * @author Jeroen Meulemeester */ public class CharacterTest { @Test public void testPrototypeStats() throws Exception { final Character prototype = new Character(); for (final Stats stat : Stats.values()) { assertFalse(prototype.has(stat)); assertNull(prototype.get(stat)); final Integer expectedValue = stat.ordinal(); prototype.set(stat, expectedValue); assertTrue(prototype.has(stat)); assertEquals(expectedValue, prototype.get(stat)); prototype.remove(stat); assertFalse(prototype.has(stat)); assertNull(prototype.get(stat)); } } @Test public void testCharacterStats() throws Exception { final Character prototype = new Character(); for (final Stats stat : Stats.values()) { prototype.set(stat, stat.ordinal()); } final Character mage = new Character(Type.MAGE, prototype); for (final Stats stat : Stats.values()) { final Integer expectedValue = stat.ordinal(); assertTrue(mage.has(stat)); assertEquals(expectedValue, mage.get(stat)); } } @Test public void testToString() throws Exception { final Character prototype = new Character(); prototype.set(Stats.ARMOR, 1); prototype.set(Stats.AGILITY, 2); prototype.set(Stats.INTELLECT, 3); assertEquals("Stats:\n - AGILITY:2\n - ARMOR:1\n - INTELLECT:3\n", prototype.toString()); final Character stupid = new Character(Type.ROGUE, prototype); stupid.remove(Stats.INTELLECT); assertEquals("Character type: ROGUE\nStats:\n - AGILITY:2\n - ARMOR:1\n", stupid.toString()); final Character weak = new Character("weak", prototype); weak.remove(Stats.ARMOR); assertEquals("Player: weak\nStats:\n - AGILITY:2\n - INTELLECT:3\n", weak.toString()); } @Test public void testName() throws Exception { final Character prototype = new Character(); prototype.set(Stats.ARMOR, 1); prototype.set(Stats.INTELLECT, 2); assertNull(prototype.name()); final Character stupid = new Character(Type.ROGUE, prototype); stupid.remove(Stats.INTELLECT); assertNull(stupid.name()); final Character weak = new Character("weak", prototype); weak.remove(Stats.ARMOR); assertEquals("weak", weak.name()); } @Test public void testType() throws Exception { final Character prototype = new Character(); prototype.set(Stats.ARMOR, 1); prototype.set(Stats.INTELLECT, 2); assertNull(prototype.type()); final Character stupid = new Character(Type.ROGUE, prototype); stupid.remove(Stats.INTELLECT); assertEquals(Type.ROGUE, stupid.type()); final Character weak = new Character("weak", prototype); weak.remove(Stats.ARMOR); assertNull(weak.type()); } }java-design-patterns-1.18.0/prototype/000077500000000000000000000000001322244523500176765ustar00rootroot00000000000000java-design-patterns-1.18.0/prototype/README.md000066400000000000000000000050721322244523500211610ustar00rootroot00000000000000--- layout: pattern title: Prototype folder: prototype permalink: /patterns/prototype/ categories: Creational tags: - Java - Gang Of Four - Difficulty-Beginner --- ## Intent Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this prototype. ## Explanation Real world example > Remember Dolly? The sheep that was cloned! Lets not get into the details but the key point here is that it is all about cloning. In plain words > Create object based on an existing object through cloning. Wikipedia says > The prototype pattern is a creational design pattern in software development. It is used when the type of objects to create is determined by a prototypical instance, which is cloned to produce new objects. In short, it allows you to create a copy of an existing object and modify it to your needs, instead of going through the trouble of creating an object from scratch and setting it up. **Programmatic Example** In Java, it can be easily done by implementing `Cloneable` and overriding `clone` from `Object` ``` class Sheep implements Cloneable { private String name; public Sheep(String name) { this.name = name; } public void setName(String name) { this.name = name; } public String getName() { return name; } @Override public Sheep clone() throws CloneNotSupportedException { return new Sheep(name); } } ``` Then it can be cloned like below ``` Sheep original = new Sheep("Jolly"); System.out.println(original.getName()); // Jolly // Clone and modify what is required Sheep cloned = original.clone(); cloned.setName("Dolly"); System.out.println(cloned.getName()); // Dolly ``` ## Applicability Use the Prototype pattern when a system should be independent of how its products are created, composed and represented; and * when the classes to instantiate are specified at run-time, for example, by dynamic loading * to avoid building a class hierarchy of factories that parallels the class hierarchy of products * when instances of a class can have one of only a few different combinations of state. It may be more convenient to install a corresponding number of prototypes and clone them rather than instantiating the class manually, each time with the appropriate state * when object creation is expensive compared to cloning ## Real world examples * [java.lang.Object#clone()](http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#clone%28%29) ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.18.0/prototype/pom.xml000066400000000000000000000043201322244523500212120ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 prototype org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.junit.jupiter junit-jupiter-params test org.mockito mockito-core test java-design-patterns-1.18.0/prototype/src/000077500000000000000000000000001322244523500204655ustar00rootroot00000000000000java-design-patterns-1.18.0/prototype/src/main/000077500000000000000000000000001322244523500214115ustar00rootroot00000000000000java-design-patterns-1.18.0/prototype/src/main/java/000077500000000000000000000000001322244523500223325ustar00rootroot00000000000000java-design-patterns-1.18.0/prototype/src/main/java/com/000077500000000000000000000000001322244523500231105ustar00rootroot00000000000000java-design-patterns-1.18.0/prototype/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500247405ustar00rootroot00000000000000java-design-patterns-1.18.0/prototype/src/main/java/com/iluwatar/prototype/000077500000000000000000000000001322244523500270055ustar00rootroot00000000000000java-design-patterns-1.18.0/prototype/src/main/java/com/iluwatar/prototype/App.java000066400000000000000000000053611322244523500303750ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.prototype; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * The Prototype pattern is a creational design pattern in software development. It is used when the * type of objects to create is determined by a prototypical instance, which is cloned to produce * new objects. This pattern is used to: - avoid subclasses of an object creator in the client * application, like the abstract factory pattern does. - avoid the inherent cost of creating a new * object in the standard way (e.g., using the 'new' keyword) *

* In this example we have a factory class ({@link HeroFactoryImpl}) producing objects by cloning * the existing ones. The factory's prototype objects are given as constructor parameters. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args command line args */ public static void main(String[] args) { HeroFactory factory; Mage mage; Warlord warlord; Beast beast; factory = new HeroFactoryImpl(new ElfMage(), new ElfWarlord(), new ElfBeast()); mage = factory.createMage(); warlord = factory.createWarlord(); beast = factory.createBeast(); LOGGER.info(mage.toString()); LOGGER.info(warlord.toString()); LOGGER.info(beast.toString()); factory = new HeroFactoryImpl(new OrcMage(), new OrcWarlord(), new OrcBeast()); mage = factory.createMage(); warlord = factory.createWarlord(); beast = factory.createBeast(); LOGGER.info(mage.toString()); LOGGER.info(warlord.toString()); LOGGER.info(beast.toString()); } } java-design-patterns-1.18.0/prototype/src/main/java/com/iluwatar/prototype/Beast.java000066400000000000000000000024651322244523500307150ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.prototype; /** * * Beast * */ public abstract class Beast extends Prototype { @Override public abstract Beast clone() throws CloneNotSupportedException; } java-design-patterns-1.18.0/prototype/src/main/java/com/iluwatar/prototype/ElfBeast.java000066400000000000000000000026451322244523500313440ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.prototype; /** * * ElfBeast * */ public class ElfBeast extends Beast { public ElfBeast() {} @Override public Beast clone() throws CloneNotSupportedException { return new ElfBeast(); } @Override public String toString() { return "Elven eagle"; } } java-design-patterns-1.18.0/prototype/src/main/java/com/iluwatar/prototype/ElfMage.java000066400000000000000000000026361322244523500311570ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.prototype; /** * * ElfMage * */ public class ElfMage extends Mage { public ElfMage() {} @Override public Mage clone() throws CloneNotSupportedException { return new ElfMage(); } @Override public String toString() { return "Elven mage"; } } java-design-patterns-1.18.0/prototype/src/main/java/com/iluwatar/prototype/ElfWarlord.java000066400000000000000000000026631322244523500317200ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.prototype; /** * * ElfWarlord * */ public class ElfWarlord extends Warlord { public ElfWarlord() {} @Override public Warlord clone() throws CloneNotSupportedException { return new ElfWarlord(); } @Override public String toString() { return "Elven warlord"; } } java-design-patterns-1.18.0/prototype/src/main/java/com/iluwatar/prototype/HeroFactory.java000066400000000000000000000025401322244523500320760ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.prototype; /** * * Interface for the factory class. * */ public interface HeroFactory { Mage createMage(); Warlord createWarlord(); Beast createBeast(); } java-design-patterns-1.18.0/prototype/src/main/java/com/iluwatar/prototype/HeroFactoryImpl.java000066400000000000000000000041221322244523500327160ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.prototype; /** * * Concrete factory class. * */ public class HeroFactoryImpl implements HeroFactory { private Mage mage; private Warlord warlord; private Beast beast; /** * Constructor */ public HeroFactoryImpl(Mage mage, Warlord warlord, Beast beast) { this.mage = mage; this.warlord = warlord; this.beast = beast; } /** * Create mage */ public Mage createMage() { try { return mage.clone(); } catch (CloneNotSupportedException e) { return null; } } /** * Create warlord */ public Warlord createWarlord() { try { return warlord.clone(); } catch (CloneNotSupportedException e) { return null; } } /** * Create beast */ public Beast createBeast() { try { return beast.clone(); } catch (CloneNotSupportedException e) { return null; } } } java-design-patterns-1.18.0/prototype/src/main/java/com/iluwatar/prototype/Mage.java000066400000000000000000000024621322244523500305250ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.prototype; /** * * Mage * */ public abstract class Mage extends Prototype { @Override public abstract Mage clone() throws CloneNotSupportedException; } java-design-patterns-1.18.0/prototype/src/main/java/com/iluwatar/prototype/OrcBeast.java000066400000000000000000000026451322244523500313610ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.prototype; /** * * OrcBeast * */ public class OrcBeast extends Beast { public OrcBeast() {} @Override public Beast clone() throws CloneNotSupportedException { return new OrcBeast(); } @Override public String toString() { return "Orcish wolf"; } } java-design-patterns-1.18.0/prototype/src/main/java/com/iluwatar/prototype/OrcMage.java000066400000000000000000000026371322244523500311750ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.prototype; /** * * OrcMage * */ public class OrcMage extends Mage { public OrcMage() {} @Override public Mage clone() throws CloneNotSupportedException { return new OrcMage(); } @Override public String toString() { return "Orcish mage"; } } java-design-patterns-1.18.0/prototype/src/main/java/com/iluwatar/prototype/OrcWarlord.java000066400000000000000000000026641322244523500317360ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.prototype; /** * * OrcWarlord * */ public class OrcWarlord extends Warlord { public OrcWarlord() {} @Override public Warlord clone() throws CloneNotSupportedException { return new OrcWarlord(); } @Override public String toString() { return "Orcish warlord"; } } java-design-patterns-1.18.0/prototype/src/main/java/com/iluwatar/prototype/Prototype.java000066400000000000000000000025011322244523500316530ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.prototype; /** * * Prototype * */ public abstract class Prototype implements Cloneable { @Override public abstract Object clone() throws CloneNotSupportedException; } java-design-patterns-1.18.0/prototype/src/main/java/com/iluwatar/prototype/Warlord.java000066400000000000000000000024731322244523500312700ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.prototype; /** * * Warlord * */ public abstract class Warlord extends Prototype { @Override public abstract Warlord clone() throws CloneNotSupportedException; } java-design-patterns-1.18.0/prototype/src/test/000077500000000000000000000000001322244523500214445ustar00rootroot00000000000000java-design-patterns-1.18.0/prototype/src/test/java/000077500000000000000000000000001322244523500223655ustar00rootroot00000000000000java-design-patterns-1.18.0/prototype/src/test/java/com/000077500000000000000000000000001322244523500231435ustar00rootroot00000000000000java-design-patterns-1.18.0/prototype/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500247735ustar00rootroot00000000000000java-design-patterns-1.18.0/prototype/src/test/java/com/iluwatar/prototype/000077500000000000000000000000001322244523500270405ustar00rootroot00000000000000java-design-patterns-1.18.0/prototype/src/test/java/com/iluwatar/prototype/AppTest.java000066400000000000000000000025121322244523500312630ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.prototype; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/prototype/src/test/java/com/iluwatar/prototype/HeroFactoryImplTest.java000066400000000000000000000043711322244523500336170ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.prototype; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertNull; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.when; /** * Date: 12/28/15 - 8:34 PM * * @author Jeroen Meulemeester */ public class HeroFactoryImplTest { @Test public void testFactory() throws Exception { final Mage mage = mock(Mage.class); final Warlord warlord = mock(Warlord.class); final Beast beast = mock(Beast.class); when(mage.clone()).thenThrow(CloneNotSupportedException.class); when(warlord.clone()).thenThrow(CloneNotSupportedException.class); when(beast.clone()).thenThrow(CloneNotSupportedException.class); final HeroFactoryImpl factory = new HeroFactoryImpl(mage, warlord, beast); assertNull(factory.createMage()); assertNull(factory.createWarlord()); assertNull(factory.createBeast()); verify(mage).clone(); verify(warlord).clone(); verify(beast).clone(); verifyNoMoreInteractions(mage, warlord, beast); } }java-design-patterns-1.18.0/prototype/src/test/java/com/iluwatar/prototype/PrototypeTest.java000066400000000000000000000047731322244523500325630ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.prototype; import org.junit.jupiter.params.ParameterizedTest; import org.junit.jupiter.params.provider.MethodSource; import java.util.Arrays; import java.util.Collection; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertNotSame; import static org.junit.jupiter.api.Assertions.assertSame; /** * Date: 12/28/15 - 8:45 PM * @param

Prototype * @author Jeroen Meulemeester */ public class PrototypeTest

{ static Collection dataProvider() { return Arrays.asList( new Object[]{new OrcBeast(), "Orcish wolf"}, new Object[]{new OrcMage(), "Orcish mage"}, new Object[]{new OrcWarlord(), "Orcish warlord"}, new Object[]{new ElfBeast(), "Elven eagle"}, new Object[]{new ElfMage(), "Elven mage"}, new Object[]{new ElfWarlord(), "Elven warlord"} ); } @ParameterizedTest @MethodSource("dataProvider") public void testPrototype(P testedPrototype, String expectedToString) throws Exception { assertEquals(expectedToString, testedPrototype.toString()); final Object clone = testedPrototype.clone(); assertNotNull(clone); assertNotSame(clone, testedPrototype); assertSame(testedPrototype.getClass(), clone.getClass()); } } java-design-patterns-1.18.0/proxy/000077500000000000000000000000001322244523500170125ustar00rootroot00000000000000java-design-patterns-1.18.0/proxy/README.md000066400000000000000000000103501322244523500202700ustar00rootroot00000000000000--- layout: pattern title: Proxy folder: proxy permalink: /patterns/proxy/ categories: Structural tags: - Java - Gang Of Four - Difficulty-Beginner --- ## Also known as Surrogate ## Intent Provide a surrogate or placeholder for another object to control access to it. ## Explanation Real world example > Imagine a tower where the local wizards go to study their spells. The ivory tower can only be accessed through a proxy which ensures that only the first three wizards can enter. Here the proxy represents the functionality of the tower and adds access control to it. In plain words > Using the proxy pattern, a class represents the functionality of another class. Wikipedia says > A proxy, in its most general form, is a class functioning as an interface to something else. A proxy is a wrapper or agent object that is being called by the client to access the real serving object behind the scenes. Use of the proxy can simply be forwarding to the real object, or can provide additional logic. In the proxy extra functionality can be provided, for example caching when operations on the real object are resource intensive, or checking preconditions before operations on the real object are invoked. **Programmatic Example** Taking our wizard tower example from above. Firstly we have the wizard tower interface and the ivory tower class ``` public interface WizardTower { void enter(Wizard wizard); } public class IvoryTower implements WizardTower { private static final Logger LOGGER = LoggerFactory.getLogger(IvoryTower.class); public void enter(Wizard wizard) { LOGGER.info("{} enters the tower.", wizard); } } ``` Then a simple wizard class ``` public class Wizard { private final String name; public Wizard(String name) { this.name = name; } @Override public String toString() { return name; } } ``` Then we have the proxy to add access control to wizard tower ``` public class WizardTowerProxy implements WizardTower { private static final Logger LOGGER = LoggerFactory.getLogger(WizardTowerProxy.class); private static final int NUM_WIZARDS_ALLOWED = 3; private int numWizards; private final WizardTower tower; public WizardTowerProxy(WizardTower tower) { this.tower = tower; } @Override public void enter(Wizard wizard) { if (numWizards < NUM_WIZARDS_ALLOWED) { tower.enter(wizard); numWizards++; } else { LOGGER.info("{} is not allowed to enter!", wizard); } } } ``` And here is tower entering scenario ``` WizardTowerProxy proxy = new WizardTowerProxy(new IvoryTower()); proxy.enter(new Wizard("Red wizard")); // Red wizard enters the tower. proxy.enter(new Wizard("White wizard")); // White wizard enters the tower. proxy.enter(new Wizard("Black wizard")); // Black wizard enters the tower. proxy.enter(new Wizard("Green wizard")); // Green wizard is not allowed to enter! proxy.enter(new Wizard("Brown wizard")); // Brown wizard is not allowed to enter! ``` ## Applicability Proxy is applicable whenever there is a need for a more versatile or sophisticated reference to an object than a simple pointer. Here are several common situations in which the Proxy pattern is applicable * Remote proxy provides a local representative for an object in a different address space. * Virtual proxy creates expensive objects on demand. * Protection proxy controls access to the original object. Protection proxies are useful when objects should have different access rights. ## Typical Use Case * Control access to another object * Lazy initialization * Implement logging * Facilitate network connection * Count references to an object ## Tutorials * [Controlling Access With Proxy Pattern](http://java-design-patterns.com/blog/controlling-access-with-proxy-pattern/) ## Presentations * [Proxy](https://github.com/iluwatar/java-design-patterns/tree/master/proxy/etc/presentation.html) ## Real world examples * [java.lang.reflect.Proxy](http://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Proxy.html) * [Apache Commons Proxy](https://commons.apache.org/proper/commons-proxy/) * Mocking frameworks Mockito, Powermock, EasyMock ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.18.0/proxy/etc/000077500000000000000000000000001322244523500175655ustar00rootroot00000000000000java-design-patterns-1.18.0/proxy/etc/presentation.html000066400000000000000000000052531322244523500231730ustar00rootroot00000000000000 Title java-design-patterns-1.18.0/proxy/etc/proxy-concept.png000066400000000000000000000605751322244523500231220ustar00rootroot00000000000000PNG  IHDRh.kzTXtmxGraphModelMTҳH}W\WpI6$o4`0j:%>7\!f7 { 'lrE(z2`wgRߗōc BN}wa0[|( #B5?? 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G.m,̝+UC^4 zvĺȯ\$?rH_5߸Yk,"éب k 9u U_@v[t}WK.bUr݈j[6;k` $ۮy]4lT7ri;i(L \5=sPqYH'69㑞/g泋_Sdvu}3oíu'o6@ #ni\G.X@N`~_~ƻ]e6m~H@[W C#@ Z@֟@)>6z:ٱ!Eo"R}~=@)~'Ш@ F3Vm PU?"6E@,oH+:oUP(~[ G1TrH7RWo ,oW\uoUP(~[ {G1(oH VSrjE@[L@) }?goD zhX`~l~⪣l~jF@[L@)X,9ǝ%@@ª) @ȴb1>IENDB`java-design-patterns-1.18.0/proxy/etc/proxy-concept.xml000066400000000000000000000050021322244523500231160ustar00rootroot00000000000000 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java-design-patterns-1.18.0/proxy/pom.xml000066400000000000000000000040601322244523500203270ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 proxy org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.mockito mockito-core test java-design-patterns-1.18.0/proxy/src/000077500000000000000000000000001322244523500176015ustar00rootroot00000000000000java-design-patterns-1.18.0/proxy/src/main/000077500000000000000000000000001322244523500205255ustar00rootroot00000000000000java-design-patterns-1.18.0/proxy/src/main/java/000077500000000000000000000000001322244523500214465ustar00rootroot00000000000000java-design-patterns-1.18.0/proxy/src/main/java/com/000077500000000000000000000000001322244523500222245ustar00rootroot00000000000000java-design-patterns-1.18.0/proxy/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500240545ustar00rootroot00000000000000java-design-patterns-1.18.0/proxy/src/main/java/com/iluwatar/proxy/000077500000000000000000000000001322244523500252355ustar00rootroot00000000000000java-design-patterns-1.18.0/proxy/src/main/java/com/iluwatar/proxy/App.java000066400000000000000000000045301322244523500266220ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.proxy; /** * * A proxy, in its most general form, is a class functioning as an interface to something else. The * proxy could interface to anything: a network connection, a large object in memory, a file, or * some other resource that is expensive or impossible to duplicate. In short, a proxy is a wrapper * or agent object that is being called by the client to access the real serving object behind the * scenes. *

* The Proxy design pattern allows you to provide an interface to other objects by creating a * wrapper class as the proxy. The wrapper class, which is the proxy, can add additional * functionality to the object of interest without changing the object's code. *

* In this example the proxy ({@link WizardTowerProxy}) controls access to the actual object ( * {@link IvoryTower}). * */ public class App { /** * Program entry point */ public static void main(String[] args) { WizardTowerProxy proxy = new WizardTowerProxy(new IvoryTower()); proxy.enter(new Wizard("Red wizard")); proxy.enter(new Wizard("White wizard")); proxy.enter(new Wizard("Black wizard")); proxy.enter(new Wizard("Green wizard")); proxy.enter(new Wizard("Brown wizard")); } } java-design-patterns-1.18.0/proxy/src/main/java/com/iluwatar/proxy/IvoryTower.java000066400000000000000000000030101322244523500302230ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.proxy; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * The object to be proxyed. * */ public class IvoryTower implements WizardTower { private static final Logger LOGGER = LoggerFactory.getLogger(IvoryTower.class); public void enter(Wizard wizard) { LOGGER.info("{} enters the tower.", wizard); } } java-design-patterns-1.18.0/proxy/src/main/java/com/iluwatar/proxy/Wizard.java000066400000000000000000000025371322244523500273470ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.proxy; /** * * Wizard * */ public class Wizard { private final String name; public Wizard(String name) { this.name = name; } @Override public String toString() { return name; } } java-design-patterns-1.18.0/proxy/src/main/java/com/iluwatar/proxy/WizardTower.java000066400000000000000000000023661322244523500303700ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.proxy; /** * WizardTower interface */ public interface WizardTower { void enter(Wizard wizard); } java-design-patterns-1.18.0/proxy/src/main/java/com/iluwatar/proxy/WizardTowerProxy.java000066400000000000000000000035131322244523500314250ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.proxy; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * The proxy controlling access to the {@link IvoryTower}. * */ public class WizardTowerProxy implements WizardTower { private static final Logger LOGGER = LoggerFactory.getLogger(WizardTowerProxy.class); private static final int NUM_WIZARDS_ALLOWED = 3; private int numWizards; private final WizardTower tower; public WizardTowerProxy(WizardTower tower) { this.tower = tower; } @Override public void enter(Wizard wizard) { if (numWizards < NUM_WIZARDS_ALLOWED) { tower.enter(wizard); numWizards++; } else { LOGGER.info("{} is not allowed to enter!", wizard); } } } java-design-patterns-1.18.0/proxy/src/test/000077500000000000000000000000001322244523500205605ustar00rootroot00000000000000java-design-patterns-1.18.0/proxy/src/test/java/000077500000000000000000000000001322244523500215015ustar00rootroot00000000000000java-design-patterns-1.18.0/proxy/src/test/java/com/000077500000000000000000000000001322244523500222575ustar00rootroot00000000000000java-design-patterns-1.18.0/proxy/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500241075ustar00rootroot00000000000000java-design-patterns-1.18.0/proxy/src/test/java/com/iluwatar/proxy/000077500000000000000000000000001322244523500252705ustar00rootroot00000000000000java-design-patterns-1.18.0/proxy/src/test/java/com/iluwatar/proxy/AppTest.java000066400000000000000000000025061322244523500275160ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.proxy; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/proxy/src/test/java/com/iluwatar/proxy/IvoryTowerTest.java000066400000000000000000000045211322244523500311260ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.proxy; import com.iluwatar.proxy.utils.InMemoryAppender; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Tests for {@link IvoryTower} */ public class IvoryTowerTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(IvoryTower.class); } @AfterEach public void tearDown() { appender.stop(); } @Test public void testEnter() throws Exception { final Wizard[] wizards = new Wizard[]{ new Wizard("Gandalf"), new Wizard("Dumbledore"), new Wizard("Oz"), new Wizard("Merlin") }; IvoryTower tower = new IvoryTower(); for (Wizard wizard : wizards) { tower.enter(wizard); } assertTrue(appender.logContains("Gandalf enters the tower.")); assertTrue(appender.logContains("Dumbledore enters the tower.")); assertTrue(appender.logContains("Oz enters the tower.")); assertTrue(appender.logContains("Merlin enters the tower.")); assertEquals(4, appender.getLogSize()); } } java-design-patterns-1.18.0/proxy/src/test/java/com/iluwatar/proxy/WizardTest.java000066400000000000000000000030431322244523500302330ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.proxy; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Tests for {@link Wizard} */ public class WizardTest { @Test public void testToString() throws Exception { final String[] wizardNames = {"Gandalf", "Dumbledore", "Oz", "Merlin"}; for (String name : wizardNames) { assertEquals(name, new Wizard(name).toString()); } } }java-design-patterns-1.18.0/proxy/src/test/java/com/iluwatar/proxy/WizardTowerProxyTest.java000066400000000000000000000045661322244523500323310ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.proxy; import com.iluwatar.proxy.utils.InMemoryAppender; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Tests for {@link WizardTowerProxy} */ public class WizardTowerProxyTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(); } @AfterEach public void tearDown() { appender.stop(); } @Test public void testEnter() throws Exception { final Wizard[] wizards = new Wizard[]{ new Wizard("Gandalf"), new Wizard("Dumbledore"), new Wizard("Oz"), new Wizard("Merlin") }; final WizardTowerProxy proxy = new WizardTowerProxy(new IvoryTower()); for (Wizard wizard : wizards) { proxy.enter(wizard); } assertTrue(appender.logContains("Gandalf enters the tower.")); assertTrue(appender.logContains("Dumbledore enters the tower.")); assertTrue(appender.logContains("Oz enters the tower.")); assertTrue(appender.logContains("Merlin is not allowed to enter!")); assertEquals(4, appender.getLogSize()); } } java-design-patterns-1.18.0/proxy/src/test/java/com/iluwatar/proxy/utils/000077500000000000000000000000001322244523500264305ustar00rootroot00000000000000java-design-patterns-1.18.0/proxy/src/test/java/com/iluwatar/proxy/utils/InMemoryAppender.java000066400000000000000000000040521322244523500325120ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.proxy.utils; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import org.slf4j.LoggerFactory; import java.util.LinkedList; import java.util.List; /** * InMemory Log Appender Util. */ public class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender(Class clazz) { ((Logger) LoggerFactory.getLogger(clazz)).addAppender(this); start(); } public InMemoryAppender() { ((Logger) LoggerFactory.getLogger("root")).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public boolean logContains(String message) { return log.stream().anyMatch(event -> event.getFormattedMessage().equals(message)); } public int getLogSize() { return log.size(); } } java-design-patterns-1.18.0/publish-subscribe/000077500000000000000000000000001322244523500212565ustar00rootroot00000000000000java-design-patterns-1.18.0/publish-subscribe/.gitignore000066400000000000000000000000111322244523500232360ustar00rootroot00000000000000/target/ java-design-patterns-1.18.0/publish-subscribe/README.md000066400000000000000000000011321322244523500225320ustar00rootroot00000000000000--- layout: pattern title: Publish Subscribe folder: publish-subscribe permalink: /patterns/publish-subscribe/ categories: Integration tags: - Java - EIP - Apache Camel™ --- ## Intent Broadcast messages from sender to all the interested receivers. ![alt text](./etc/publish-subscribe.png "Publish Subscribe Channel") ## Applicability Use the Publish Subscribe Channel pattern when * two or more applications need to communicate using a messaging system for broadcasts. ## Credits * [J2EE Design Patterns](http://www.amazon.com/J2EE-Design-Patterns-William-Crawford/dp/0596004273/ref=sr_1_2) java-design-patterns-1.18.0/publish-subscribe/etc/000077500000000000000000000000001322244523500220315ustar00rootroot00000000000000java-design-patterns-1.18.0/publish-subscribe/etc/publish-subscribe.png000066400000000000000000000661351322244523500261770ustar00rootroot00000000000000PNG  IHDR Yl$IDATxo$G}=ʋ(yt/~z{9,tB''+΃F,ƈ5p>^/8#}Nwkb' #nPMPy/U{QwjF(8XAԻP-Ŀiѷ \c3IUJ)@@PpP.P%|00 z  ^B@(o/t.x$|00Z(xk9@=``(cTv glFCN$|  b, >eIf<`KHivݗ'aq"NڝD0FE n VR3cNm)d. b< EG(.D3CE~@QæyNgwwȊRVoMgxb +!~\; dN(ZS$QXksrڝKD\00۰nloz}KC΢'D1/d.8rQQ ^rW/\K(8``((x > ^rW/\)76NjW|ٗ/,|6iFeۇC;T՝m ර0M:,)#6rS;7Ol|z_Gyoۋ/}]zץ3>f=۽I}]Ow[3Hl.nS1mR4zwHv+m%"U?h G@@)ѥǗO>S⥷~vOYs"})ǯfDSALWL7兺o3+07PpPa`( U>xW.2k7g"?|n9o تa:aDdVT MuBi0Q<ʻu"FשQ8 zE#3KΓů}GG/ī9lI"m2JI$?T^3Dޯ^~^"'嚟E:SóRp9& CP.c ~﹣Ǘ?b[Qu!r!4-D}j:;%tU[\^1_w aWGW(! a`(Z7)Gf>;+?!:\)8ir > ^rW/\K(8``((x > ^rW/\K(8``(Gl*b}u(8``((xꃂ@008_6,ؚ=NC28Z)z}R~MNfNS@݈lZ=U џK^o~+5/mG\ S㿌=# 00hww*Zv_%Cç e땔*jp3S[g7OTmaР}Hc-Am՜EIѾK٭ ';# 00HD޶k2آ Ğ89)Q-DO_;KX<%_F$<# 00(WJ;q0;s)4oU9T VpBJ΁PK]gD rg\ x!CDíTZ (<(x3@H5\ نNf6krJӸ zϮ8\))xgD r p2t*O>2WDϮY(Qg"G@ZE'NIV悓H(8``() 24'|00̢$|00 z  ^B@@PpP.{W7-r@at:P(8FPK0Pp'P(8?(    z@=a@0@aPO0Pp'P(8?(    z@=a@0@aPO0Pp'P(8?n155Ut5r1tVVV"2ZqU0Pp~zz:"P(8f}iwww{{{@0>7Ѿt…VPp[[[fSÇ766\B@`LOO}ׯ8p ceeev={vqq޾}|?ܿNQU3(8,uq[ nP,5pg9p!(8@ˁ@ A.@1ˁ@ Ardj Pw1d #B u)u2o!t9FL(8@%s4bB* ;@ PIr'PpJB#RVc}O4 $t9Gl+pr, PIrd|~r,Po; o-l'_ʄT:w)$aYoEw zpgGȿSv=%pK(8@%sȑ*-ZJό;y+61ENi!?l) Gʨa/-.yDIe ֞UGSpJӘ6D:jXr"K-ŷM:K5y]S@(8@sȑm+G^D}3ky*!PO!q3U!Z7?6h,Y7[1_#NŜ,ǚC" .Gނ|y#B*T:wi_Q(]I>fid/A?%/%9T~P+卸&йH#.u}G>Γů}GG/ījuP9hY\LŸc(I%tب7yE  ;@4tOsG/#=Ŷ`֔7\onő W^4}ૣ+.fQ$ OCsd2;&йV sF߹{~;{OI>K~Tp, GgD`r^r3Pp:w)&2 GPp҈ $t9FL(8@%s4bB* ;@ PIr'PpJB#Wp+V*c(8@%sA cr$#=FX`kr8;hh?۳8#n4ۍȦSfK?crQVgD :wC]JuW)0Hz%e S#a,>toV^Y [ݪp3;@uB}M3[@س'gP7=ӻ U+&[,aQr(8@#+"|P<؉)xߙK xu%Rx˨uUu%^R$<# 1йHR[v" ngjuDFrdsm\p1KdkfL/4ʠWpjɉ q" yFbsȑ<<NBpZŶ@F](us`p: %Uݹ9,CDuQpH;@SR;T悓JPpJB#E( 24M(8@%sȑO(8@%s4bB* ;@ PIr'PpJB#0*.A 3:T҂@f,--uHP? 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3l.[湾xUQ;C!ɚj;;*"a1B_B. ~O=镍Zo_^hji2r!JZs ]m%"sA4@Oïgݫ"=Zy~ru#҃_ao1z^hvނOC:4; ~ҥ۠I{VOgtM҇ut[_]:y|=%zowğSh~)w[72dF_}gC{ BD"N uV_t: J쩃wEX[ܳtHg>ϟl%+?I fo;^;#tU-O:PN5:҇oexM}+܏߾v}&8x7}#;xV?zՔo4rZ:* 3GaY{G @1>=d -,BŐh%w2 OOCէ1 AQ'5*1Huz9dyMQ"'+:ۇVKP'6!xPaN!8_>\3?>є!iCmWnq@^I/}O<Ć3jYi 1ndo-1wܩ<ŨY /gfa^OIݻ_8 PZ6CK %Um_:2S*3h>Jie.?} 8Bp WQ<'c/ sa&#BI%$8,P1!intj3N2IX/?]\zhмb/ 3Gark|%'Ő_*f Ȭ!8?}=1 G{ߠ C~`9 { @1 G{ߠ C~`9 { J?~li7::p`UV`U~NIENDB`java-design-patterns-1.18.0/publish-subscribe/etc/publish-subscribe.ucls000066400000000000000000000300501322244523500263440ustar00rootroot00000000000000 java-design-patterns-1.18.0/publish-subscribe/pom.xml000066400000000000000000000041121322244523500225710ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 publish-subscribe org.apache.camel camel-core org.apache.camel camel-stream org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/publish-subscribe/src/000077500000000000000000000000001322244523500220455ustar00rootroot00000000000000java-design-patterns-1.18.0/publish-subscribe/src/main/000077500000000000000000000000001322244523500227715ustar00rootroot00000000000000java-design-patterns-1.18.0/publish-subscribe/src/main/java/000077500000000000000000000000001322244523500237125ustar00rootroot00000000000000java-design-patterns-1.18.0/publish-subscribe/src/main/java/com/000077500000000000000000000000001322244523500244705ustar00rootroot00000000000000java-design-patterns-1.18.0/publish-subscribe/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500263205ustar00rootroot00000000000000java-design-patterns-1.18.0/publish-subscribe/src/main/java/com/iluwatar/publish/000077500000000000000000000000001322244523500277665ustar00rootroot00000000000000java-design-patterns-1.18.0/publish-subscribe/src/main/java/com/iluwatar/publish/subscribe/000077500000000000000000000000001322244523500317475ustar00rootroot00000000000000java-design-patterns-1.18.0/publish-subscribe/src/main/java/com/iluwatar/publish/subscribe/App.java000066400000000000000000000063201322244523500333330ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.publish.subscribe; import org.apache.camel.CamelContext; import org.apache.camel.ProducerTemplate; import org.apache.camel.builder.RouteBuilder; import org.apache.camel.impl.DefaultCamelContext; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * There are well-established patterns for implementing broadcasting. The Observer pattern describes * the need to decouple observers from their subject (that is, the originator of the event) so that * the subject can easily provide event notification to all interested observers no matter how many * observers there are (even none). The Publish-Subscribe pattern expands upon Observer by adding * the notion of an event channel for communicating event notifications. *

* A Publish-Subscribe Channel works like this: It has one input channel that splits into multiple * output channels, one for each subscriber. When an event is published into the channel, the * Publish-Subscribe Channel delivers a copy of the message to each of the output channels. Each * output end of the channel has only one subscriber, which is allowed to consume a message only * once. In this way, each subscriber gets the message only once, and consumed copies disappear from * their channels. *

* In this example we use Apache Camel to establish a Publish-Subscribe Channel from "direct-origin" * to "mock:foo", "mock:bar" and "stream:out". * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point */ public static void main(String[] args) throws Exception { CamelContext context = new DefaultCamelContext(); context.addRoutes(new RouteBuilder() { @Override public void configure() throws Exception { from("direct:origin").multicast().to("mock:foo", "mock:bar", "stream:out"); } }); ProducerTemplate template = context.createProducerTemplate(); context.start(); context.getRoutes().stream().forEach(r -> LOGGER.info(r.toString())); template.sendBody("direct:origin", "Hello from origin"); context.stop(); } } java-design-patterns-1.18.0/publish-subscribe/src/main/resources/000077500000000000000000000000001322244523500250035ustar00rootroot00000000000000java-design-patterns-1.18.0/publish-subscribe/src/main/resources/logback.xml000066400000000000000000000040031322244523500271240ustar00rootroot00000000000000 publish-subscribe.log publish-subscribe-%d.log 5 %-5p [%d{ISO8601,UTC}] %c: %m%n %-5p [%d{ISO8601,UTC}] %c: %m%n java-design-patterns-1.18.0/publish-subscribe/src/test/000077500000000000000000000000001322244523500230245ustar00rootroot00000000000000java-design-patterns-1.18.0/publish-subscribe/src/test/java/000077500000000000000000000000001322244523500237455ustar00rootroot00000000000000java-design-patterns-1.18.0/publish-subscribe/src/test/java/com/000077500000000000000000000000001322244523500245235ustar00rootroot00000000000000java-design-patterns-1.18.0/publish-subscribe/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500263535ustar00rootroot00000000000000java-design-patterns-1.18.0/publish-subscribe/src/test/java/com/iluwatar/publish/000077500000000000000000000000001322244523500300215ustar00rootroot00000000000000java-design-patterns-1.18.0/publish-subscribe/src/test/java/com/iluwatar/publish/subscribe/000077500000000000000000000000001322244523500320025ustar00rootroot00000000000000AppTest.java000066400000000000000000000025431322244523500341520ustar00rootroot00000000000000java-design-patterns-1.18.0/publish-subscribe/src/test/java/com/iluwatar/publish/subscribe/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.publish.subscribe; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() throws Exception { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/queue-load-leveling/000077500000000000000000000000001322244523500214755ustar00rootroot00000000000000java-design-patterns-1.18.0/queue-load-leveling/README.md000066400000000000000000000026431322244523500227610ustar00rootroot00000000000000--- layout: pattern title: Queue based load leveling folder: queue-load-leveling permalink: /patterns/queue-load-leveling/ categories: Other tags: - Java - Difficulty-Intermediate - Performance --- ## Intent Use a queue that acts as a buffer between a task and a service that it invokes in order to smooth intermittent heavy loads that may otherwise cause the service to fail or the task to time out. This pattern can help to minimize the impact of peaks in demand on availability and responsiveness for both the task and the service. ![alt text](./etc/queue-load-leveling.gif "queue-load-leveling") ## Applicability * This pattern is ideally suited to any type of application that uses services that may be subject to overloading. * This pattern might not be suitable if the application expects a response from the service with minimal latency. ## Tutorials * [Queue-Based Load Leveling Pattern](http://java-design-patterns.com/blog/queue-load-leveling/) ## Real world example * A Microsoft Azure web role stores data by using a separate storage service. If a large number of instances of the web role run concurrently, it is possible that the storage service could be overwhelmed and be unable to respond to requests quickly enough to prevent these requests from timing out or failing. ## Credits * [Microsoft Cloud Design Patterns: Queue-Based Load Leveling Pattern](https://msdn.microsoft.com/en-us/library/dn589783.aspx) java-design-patterns-1.18.0/queue-load-leveling/etc/000077500000000000000000000000001322244523500222505ustar00rootroot00000000000000java-design-patterns-1.18.0/queue-load-leveling/etc/queue-load-leveling.gif000066400000000000000000000353261322244523500266140ustar00rootroot00000000000000GIF89a@|]qK`9Phowx3M2G}ЫܿàǛ$v>ڻ{zagطҰcwF^R^ơmpgjYa.}E6J>OwɮϳXm^jkzly茼FW|Tj@X-(bS捠BOw爐/J!z4@YuI.`Ms_tҝƐqVpϙVqvd?_ClJeo䗈r`}leTϮaOztżiYo]\I^NUBxxf,@|H*\ȰÇ#JHŋ3jȱǏ CIɓ(S\ɲ˗0cʜI͛8sϟ@ JѣH*]ʴӧP.E)իXjʵŠKٳhӪ]˶۷pʝKnT˷߿[È+^̘.aKL峏F̹3 ӟE גUd nUͻﲲCM8h t䔃|.bWu{_sIGI=}l⧯~_ѶO5Ou A~U^=%` :G!f!&j(/*9X0xZ(G.Ȟ4&!:,EIWd eQ %_jp_g !^8#kC!gyfvgi (~ ]睔BJ>PF-*$ЩfɤK:+)R'n'Xz\#Vju&[sֺ,fkve*lakV;j.n&k+]<+ K-%a'%| +k 2f'qˁ4_(G֬sv7oD_6sH'FC'bG?-mKgXWX\V5FWw-v\Qme__lupOEkmwvZz=Xϭ @@@~{in8ㇷk@# ^(͜MYgy'Dqov 4@@\1 ߺg;g{|%Wh `@$ @nbϨ]oyCi<^@*` $%)SyBr%Gc.aF,}<  :AP#BZT+ ZA6@  A6EP\ ~੮Eۀp"=dKX#&q*dS[aqz,c85\ğW,@ I h"V'z|" 81."g$! 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.queue.load.leveling; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Many solutions in the cloud involve running tasks that invoke services. In this environment, * if a service is subjected to intermittent heavy loads, it can cause performance or reliability issues. *

* A service could be a component that is part of the same solution as the tasks that utilize it, or it * could be a third-party service providing access to frequently used resources such as a cache or a storage service. * If the same service is utilized by a number of tasks running concurrently, it can be difficult to predict the * volume of requests to which the service might be subjected at any given point in time. *

* We will build a queue-based-load-leveling to solve above problem. * Refactor the solution and introduce a queue between the task and the service. * The task and the service run asynchronously. The task posts a message containing the data required * by the service to a queue. The queue acts as a buffer, storing the message until it is retrieved * by the service. The service retrieves the messages from the queue and processes them. * Requests from a number of tasks, which can be generated at a highly variable rate, can be passed * to the service through the same message queue. *

* The queue effectively decouples the tasks from the service, and the service can handle the messages * at its own pace irrespective of the volume of requests from concurrent tasks. Additionally, * there is no delay to a task if the service is not available at the time it posts a message to the queue. *

* In this example we have a class {@link MessageQueue} to hold the message {@link Message} objects. * All the worker threads {@link TaskGenerator} will submit the messages to the MessageQueue. * The service executor class {@link ServiceExecutor} will pick up one task at a time from the Queue and * execute them. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); //Executor shut down time limit. private static final int SHUTDOWN_TIME = 15; /** * Program entry point * * @param args command line args */ public static void main(String[] args) { // An Executor that provides methods to manage termination and methods that can // produce a Future for tracking progress of one or more asynchronous tasks. ExecutorService executor = null; try { // Create a MessageQueue object. MessageQueue msgQueue = new MessageQueue(); LOGGER.info("Submitting TaskGenerators and ServiceExecutor threads."); // Create three TaskGenerator threads. Each of them will submit different number of jobs. Runnable taskRunnable1 = new TaskGenerator(msgQueue, 5); Runnable taskRunnable2 = new TaskGenerator(msgQueue, 1); Runnable taskRunnable3 = new TaskGenerator(msgQueue, 2); // Create e service which should process the submitted jobs. Runnable srvRunnable = new ServiceExecutor(msgQueue); // Create a ThreadPool of 2 threads and // submit all Runnable task for execution to executor.. executor = Executors.newFixedThreadPool(2); executor.submit(taskRunnable1); executor.submit(taskRunnable2); executor.submit(taskRunnable3); // submitting serviceExecutor thread to the Executor service. executor.submit(srvRunnable); // Initiates an orderly shutdown. LOGGER.info("Intiating shutdown. Executor will shutdown only after all the Threads are completed."); executor.shutdown(); // Wait for SHUTDOWN_TIME seconds for all the threads to complete // their tasks and then shut down the executor and then exit. if ( !executor.awaitTermination(SHUTDOWN_TIME, TimeUnit.SECONDS) ) { LOGGER.info("Executor was shut down and Exiting."); executor.shutdownNow(); } } catch (InterruptedException ie) { LOGGER.error(ie.getMessage()); } catch (Exception e) { LOGGER.error(e.getMessage()); } } }Message.java000066400000000000000000000027751322244523500345720ustar00rootroot00000000000000java-design-patterns-1.18.0/queue-load-leveling/src/main/java/com/iluwatar/queue/load/leveling/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.queue.load.leveling; /** * Message class with only one parameter. * */ public class Message { private final String msg; // Parameter constructor. public Message(String msg) { super(); this.msg = msg; } // Get Method for attribute msg. public String getMsg() { return msg; } @Override public String toString() { return msg; } }MessageQueue.java000066400000000000000000000047431322244523500355740ustar00rootroot00000000000000java-design-patterns-1.18.0/queue-load-leveling/src/main/java/com/iluwatar/queue/load/leveling/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.queue.load.leveling; import java.util.concurrent.ArrayBlockingQueue; import java.util.concurrent.BlockingQueue; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * MessageQueue class. * In this class we will create a Blocking Queue and * submit/retrieve all the messages from it. */ public class MessageQueue { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); private final BlockingQueue blkQueue; // Default constructor when called creates Blocking Queue object. public MessageQueue() { this.blkQueue = new ArrayBlockingQueue(1024); } /** * All the TaskGenerator threads will call this method to insert the * Messages in to the Blocking Queue. */ public void submitMsg(Message msg) { try { if (null != msg) { blkQueue.add(msg); } } catch (Exception e) { LOGGER.error(e.getMessage()); } } /** * All the messages will be retrieved by the ServiceExecutor by * calling this method and process them. * Retrieves and removes the head of this queue, or returns null if this queue is empty. */ public Message retrieveMsg() { Message retrievedMsg = null; try { retrievedMsg = blkQueue.poll(); } catch (Exception e) { LOGGER.error(e.getMessage()); } return retrievedMsg; } }ServiceExecutor.java000066400000000000000000000042631322244523500363170ustar00rootroot00000000000000java-design-patterns-1.18.0/queue-load-leveling/src/main/java/com/iluwatar/queue/load/leveling/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.queue.load.leveling; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * ServiceExecuotr class. * This class will pick up Messages one by one from * the Blocking Queue and process them. */ public class ServiceExecutor implements Runnable { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); private final MessageQueue msgQueue; public ServiceExecutor(MessageQueue msgQueue) { this.msgQueue = msgQueue; } /** * The ServiceExecutor thread will retrieve each message and process it. */ public void run() { try { while (!Thread.currentThread().isInterrupted()) { Message msg = msgQueue.retrieveMsg(); if (null != msg) { LOGGER.info(msg.toString() + " is served."); } else { LOGGER.info("Service Executor: Waiting for Messages to serve .. "); } Thread.sleep(1000); } } catch (InterruptedException ie) { LOGGER.error(ie.getMessage()); } catch (Exception e) { LOGGER.error(e.getMessage()); } } }Task.java000066400000000000000000000023621322244523500341000ustar00rootroot00000000000000java-design-patterns-1.18.0/queue-load-leveling/src/main/java/com/iluwatar/queue/load/leveling/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.queue.load.leveling; /** * Task Interface. * */ public interface Task { void submit(Message msg); } TaskGenerator.java000066400000000000000000000056011322244523500357460ustar00rootroot00000000000000java-design-patterns-1.18.0/queue-load-leveling/src/main/java/com/iluwatar/queue/load/leveling/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.queue.load.leveling; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * TaskGenerator class. * Each TaskGenerator thread will be a Worker which submit's messages to the queue. * We need to mention the message count for each of the TaskGenerator threads. * */ public class TaskGenerator implements Task, Runnable { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); // MessageQueue reference using which we will submit our messages. private final MessageQueue msgQueue; // Total message count that a TaskGenerator will submit. private final int msgCount; // Parameterized constructor. public TaskGenerator(MessageQueue msgQueue, int msgCount) { this.msgQueue = msgQueue; this.msgCount = msgCount; } /** * Submit messages to the Blocking Queue. */ public void submit(Message msg) { try { this.msgQueue.submitMsg(msg); } catch (Exception e) { LOGGER.error(e.getMessage()); } } /** * Each TaskGenerator thread will submit all the messages to the Queue. * After every message submission TaskGenerator thread will sleep for 1 second. */ public void run() { int count = this.msgCount; try { while (count > 0) { String statusMsg = "Message-" + count + " submitted by " + Thread.currentThread().getName(); this.submit(new Message(statusMsg)); LOGGER.info(statusMsg); // reduce the message count. count--; // Make the current thread to sleep after every Message submission. Thread.sleep(1000); } } catch (InterruptedException ie) { LOGGER.error(ie.getMessage()); } catch (Exception e) { LOGGER.error(e.getMessage()); } } }java-design-patterns-1.18.0/queue-load-leveling/src/test/000077500000000000000000000000001322244523500232435ustar00rootroot00000000000000java-design-patterns-1.18.0/queue-load-leveling/src/test/java/000077500000000000000000000000001322244523500241645ustar00rootroot00000000000000java-design-patterns-1.18.0/queue-load-leveling/src/test/java/com/000077500000000000000000000000001322244523500247425ustar00rootroot00000000000000java-design-patterns-1.18.0/queue-load-leveling/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500265725ustar00rootroot00000000000000java-design-patterns-1.18.0/queue-load-leveling/src/test/java/com/iluwatar/queue/000077500000000000000000000000001322244523500277165ustar00rootroot00000000000000java-design-patterns-1.18.0/queue-load-leveling/src/test/java/com/iluwatar/queue/load/000077500000000000000000000000001322244523500306355ustar00rootroot00000000000000java-design-patterns-1.18.0/queue-load-leveling/src/test/java/com/iluwatar/queue/load/leveling/000077500000000000000000000000001322244523500324425ustar00rootroot00000000000000AppTest.java000066400000000000000000000025661322244523500346170ustar00rootroot00000000000000java-design-patterns-1.18.0/queue-load-leveling/src/test/java/com/iluwatar/queue/load/leveling/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.queue.load.leveling; import org.junit.jupiter.api.Test; import java.io.IOException; /** * Application Test */ public class AppTest { @Test public void test() throws IOException { String[] args = {}; App.main(args); } }MessageQueueTest.java000066400000000000000000000032341322244523500364610ustar00rootroot00000000000000java-design-patterns-1.18.0/queue-load-leveling/src/test/java/com/iluwatar/queue/load/leveling/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.queue.load.leveling; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * * Test case for submitting and retrieving messages from Blocking Queue. * */ public class MessageQueueTest { @Test public void messageQueueTest() { MessageQueue msgQueue = new MessageQueue(); // submit message msgQueue.submitMsg(new Message("MessageQueue Test")); // retrieve message assertEquals(msgQueue.retrieveMsg().getMsg(), "MessageQueue Test"); } } MessageTest.java000066400000000000000000000030611322244523500354520ustar00rootroot00000000000000java-design-patterns-1.18.0/queue-load-leveling/src/test/java/com/iluwatar/queue/load/leveling/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.queue.load.leveling; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; /** * * Test case for creating and checking the Message. * */ public class MessageTest { @Test public void messageTest() { // Parameterized constructor test. String testMsg = "Message Test"; Message msg = new Message(testMsg); assertEquals(msg.getMsg(), testMsg); } } TaskGenSrvExeTest.java000066400000000000000000000035051322244523500365620ustar00rootroot00000000000000java-design-patterns-1.18.0/queue-load-leveling/src/test/java/com/iluwatar/queue/load/leveling/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.queue.load.leveling; import org.junit.jupiter.api.Test; /** * * Test case for submitting Message to Blocking Queue by TaskGenerator * and retrieve the message by ServiceExecutor. * */ public class TaskGenSrvExeTest { @Test public void taskGeneratorTest() { MessageQueue msgQueue = new MessageQueue(); // Create a task generator thread with 1 job to submit. Runnable taskRunnable = new TaskGenerator(msgQueue, 1); Thread taskGenThr = new Thread(taskRunnable); taskGenThr.start(); // Create a service executor thread. Runnable srvRunnable = new ServiceExecutor(msgQueue); Thread srvExeThr = new Thread(srvRunnable); srvExeThr.start(); } } java-design-patterns-1.18.0/reactor/000077500000000000000000000000001322244523500172705ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/README.md000066400000000000000000000026421322244523500205530ustar00rootroot00000000000000--- layout: pattern title: Reactor folder: reactor permalink: /patterns/reactor/ pumlformat: svg categories: Concurrency tags: - Java - Difficulty-Expert - I/O --- ## Intent The Reactor design pattern handles service requests that are delivered concurrently to an application by one or more clients. The application can register specific handlers for processing which are called by reactor on specific events. Dispatching of event handlers is performed by an initiation dispatcher, which manages the registered event handlers. Demultiplexing of service requests is performed by a synchronous event demultiplexer. ![Reactor](./etc/reactor.png "Reactor") ## Applicability Use Reactor pattern when * a server application needs to handle concurrent service requests from multiple clients. * a server application needs to be available for receiving requests from new clients even when handling older client requests. * a server must maximize throughput, minimize latency and use CPU efficiently without blocking. ## Real world examples * [Spring Reactor](http://projectreactor.io/) ## Credits * [Douglas C. Schmidt - Reactor](https://www.dre.vanderbilt.edu/~schmidt/PDF/Reactor.pdf) * [Pattern Oriented Software Architecture Vol I-V](http://www.amazon.com/Pattern-Oriented-Software-Architecture-Volume-Patterns/dp/0471958697) * [Doug Lea - Scalable IO in Java](http://gee.cs.oswego.edu/dl/cpjslides/nio.pdf) * [Netty](http://netty.io/) java-design-patterns-1.18.0/reactor/etc/000077500000000000000000000000001322244523500200435ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/etc/reactor.png000066400000000000000000003655541322244523500222320ustar00rootroot00000000000000PNG  IHDR33IDATx]\G6EI̧ Fc*APP + B(vT$ƚDcQgMw;qfgggfw߇}@ @ 5@ @  @ : @ JP@ _$@ TRHI j2v@(A"#APM@Ǝ@ % 5H$r$5H  D B5;@ `Y`֠A@2S\7fL/iݺɹs[C~Պ B5;@ Ԡb>}z9KN-`B/#۸΃JϜ|^9Dy$5H,'.A/@:AjP_Ϛ={Q͛ˑ_(>T7&fQԩdVM&.XTعsAӒ5㬭^zzoyyZAF 8Q%$L/)`66w/yPfG!֬CF>{Xtyc,,7@ ._j{7wӦ! 27w 2DHj@ B3!&^^W+ែ|xpWަ..V\֭(ff?C\acԠ vm%==Tp]iܝ-$5H,'DR@ 1_.JM 2s]|(QQf\f7EiѢ{]~9EW92 08chO@L ʼٳcٱ8;hB4 ظʕCIRpJ$5H !șPӧGv6]n?9nn6[̝[\u|f-?޵OsehkkHGi<Df 7o^b9Dy$5H,h(MR@B˜ iwul׮.60hcѢ S C7k|?9y2 p|ر?~۶M-u_E|,,ml ukPfo>BR͂pҬ^$LGR͂p\Hj@ Bh3A$V4I 4 a)Js!A@ X9$5H,h(U˰=@*Ӄ~gHq#h4€S~D"Q$I@HHƍY,NQNRD"|H6 ;ȑA4Db&mvyL:-4r+bA@I !9L22"p6 |Xq$F,'DRՂf +Ɲ/_wݹ3BJMw!Va&apch3zXna¶30}T篿Al۴iO?ĩE&l]AG{`n{T0j"ɸ4 d*ԠӣG&(ay҄5X\gcc7o><ܸNZ?sf͛{Kr dLb٩/U/f1 -DS0v-& ;:wܸ8V.`dqʔʔ#Jȸ4 d*ԠٳG1yBy9Ç;ٙLH% rnAY6`@ϱc;;[Ł:Ծ~S=lZ[ZꧥE\v-'' q7@tD733F\Ϸ&%VCT/a&asߘֲ9cΥ#G%98;.9fNO o`lܩVDÖ vaa6Y:55s6847Hhjk?G24GuPA\bޙ@53ӓ4 )ΆkݺjK2npJ$5h*ݻ09P\f5ٳcѾLn}&H/qN $mn{2F?^^}M d`>۳"$ߧ~ a-M_ ?@^HƍYj.љ]zjԠq ]pWަ..Vp2nڋ;AٳGjAepM rj²u&Hmp~=XaN [ 9kK\wCӦ3(/äM .QX%s_]كH5 wt1 uf۾}ќ9a6%E׮K~ -] ХKs綢L\XU3y>XJ =:thĺusP2#c)җ/fe޻wѣ#d+Ee6:6rڇ A\6 A|JoT`~]7t7lsZӧG5k5<=ΘfL왛w]Vo,W?5 `7œx$*q= k@q+!0iȰ 7rKp*j 먁VK\oRw81n`njF^@ .\Da:vIf !؅ڤE*̈́aZ5?V͚#Iwׯ'||C(4N} ɸ4 Z`ep;1HӃKR@ѣp 3feK(܋sKօ8N,eǻc ٳ[,-qxW^(@rZTsNl޼=ʊeKr dl:2qg1>y?}ΗJ ?{8yѾ;BYaN "1: MKfvZgώծ]o_s{lm?IDcK:Q'gBf^^< fM^(/\رre L(_ lZqjN2n͂py% LœڵkS֤IɓdXA\2%%uj#A!{Os.#xz:B\] p lmPƍ5ON^ ~xm6eG! <ewb ȼ;9Or dLQۙVN x7nn>3&o58+) ǡ@ ޹s?kv,?;wFȤG%҅uq#z2 :՝IĄO>~&%wGȄg[fӤA\AgL[,1;vl͛zyEzhgy?hJͽu|La 5H$ˇ0iȰL×CGo4/3<"'H]mg|5(A4Y͚7i`@BALHo_\m=xpD9̌:HtiᇵcUԪU7MjPɸ4 mpwJPKprxw ,ŋj׮ժUc6N2sn̳WfXr6l9qc=pܸ}z^% 8$Cr de|ƺv_O×D#7fA 84vŧǚ1\Z"54Ex$EF`QQG͚3fi߬YCg_yr#>^ZZ̳|d/ed,̌.W_I}_K& ]|wpɖ-ܻK[YHjH$a&a'9q#h4ڀyƌY''BB5lNws ?*7'gY& خfD￧<~\d”?: L!=n܀Cml ͽ^\<,Y0:odt^0iȰɸ4 n1_!{utΖz~]7AzuΖlV$PFW MsG󱛛_H_ ܹMڵThNMNNH#~Gj2ԠqW'!-<ƈ4r9a&a'9q#hS$AM"$_.bjPv;={TevӰ dAr Z`؋`GG2nzB&%'/ܹclmbc/"cfݺ9H#se`Ɲ$7緍|AԌ Y#G:?t(^vl`X+'Æ?u^!Jp/\W>ivm޼wF :#~5F|gkP.$F,h'V&I j Ǻnw& -g!=Ƹlc##/)1c!iHO!

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AAq@5Hv"R A  j_r;AAAtEP AAAtEP AAAtE java-design-patterns-1.18.0/reactor/pom.xml000066400000000000000000000036441322244523500206140ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 reactor org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/reactor/src/000077500000000000000000000000001322244523500200575ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/src/main/000077500000000000000000000000001322244523500210035ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/src/main/java/000077500000000000000000000000001322244523500217245ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/src/main/java/com/000077500000000000000000000000001322244523500225025ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500243325ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/src/main/java/com/iluwatar/reactor/000077500000000000000000000000001322244523500257715ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/src/main/java/com/iluwatar/reactor/app/000077500000000000000000000000001322244523500265515ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/src/main/java/com/iluwatar/reactor/app/App.java000066400000000000000000000133741322244523500301440ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reactor.app; import java.io.IOException; import java.util.ArrayList; import java.util.List; import com.iluwatar.reactor.framework.AbstractNioChannel; import com.iluwatar.reactor.framework.ChannelHandler; import com.iluwatar.reactor.framework.Dispatcher; import com.iluwatar.reactor.framework.NioDatagramChannel; import com.iluwatar.reactor.framework.NioReactor; import com.iluwatar.reactor.framework.NioServerSocketChannel; import com.iluwatar.reactor.framework.ThreadPoolDispatcher; /** * This application demonstrates Reactor pattern. The example demonstrated is a Distributed Logging * Service where it listens on multiple TCP or UDP sockets for incoming log requests. * *

* INTENT
* The Reactor design pattern handles service requests that are delivered concurrently to an * application by one or more clients. The application can register specific handlers for processing * which are called by reactor on specific events. * *

* PROBLEM
* Server applications in a distributed system must handle multiple clients that send them service * requests. Following forces need to be resolved: *

    *
  • Availability
    • *
  • Efficiency
    • *
  • Programming Simplicity
    • *
  • Adaptability
    • *
* *

* PARTICIPANTS
*

    *
  • Synchronous Event De-multiplexer
    • {@link NioReactor} plays the role of synchronous event * de-multiplexer. It waits for events on multiple channels registered to it in an event loop. * *

    *

  • Initiation Dispatcher
    • {@link NioReactor} plays this role as the application specific * {@link ChannelHandler}s are registered to the reactor. * *

    *

  • Handle
    • {@link AbstractNioChannel} acts as a handle that is registered to the reactor. * When any events occur on a handle, reactor calls the appropriate handler. * *

    *

  • Event Handler
    • {@link ChannelHandler} acts as an event handler, which is bound to a * channel and is called back when any event occurs on any of its associated handles. Application * logic resides in event handlers. *
* *

* The application utilizes single thread to listen for requests on all ports. It does not create a * separate thread for each client, which provides better scalability under load (number of clients * increase). * *

* The example uses Java NIO framework to implement the Reactor. * */ public class App { private NioReactor reactor; private List channels = new ArrayList<>(); private Dispatcher dispatcher; /** * Creates an instance of App which will use provided dispatcher for dispatching events on * reactor. * * @param dispatcher the dispatcher that will be used to dispatch events. */ public App(Dispatcher dispatcher) { this.dispatcher = dispatcher; } /** * App entry. */ public static void main(String[] args) throws IOException { new App(new ThreadPoolDispatcher(2)).start(); } /** * Starts the NIO reactor. * * @throws IOException if any channel fails to bind. */ public void start() throws IOException { /* * The application can customize its event dispatching mechanism. */ reactor = new NioReactor(dispatcher); /* * This represents application specific business logic that dispatcher will call on appropriate * events. These events are read events in our example. */ LoggingHandler loggingHandler = new LoggingHandler(); /* * Our application binds to multiple channels and uses same logging handler to handle incoming * log requests. */ reactor.registerChannel(tcpChannel(6666, loggingHandler)) .registerChannel(tcpChannel(6667, loggingHandler)) .registerChannel(udpChannel(6668, loggingHandler)).start(); } /** * Stops the NIO reactor. This is a blocking call. * * @throws InterruptedException if interrupted while stopping the reactor. * @throws IOException if any I/O error occurs */ public void stop() throws InterruptedException, IOException { reactor.stop(); dispatcher.stop(); for (AbstractNioChannel channel : channels) { channel.getJavaChannel().close(); } } private AbstractNioChannel tcpChannel(int port, ChannelHandler handler) throws IOException { NioServerSocketChannel channel = new NioServerSocketChannel(port, handler); channel.bind(); channels.add(channel); return channel; } private AbstractNioChannel udpChannel(int port, ChannelHandler handler) throws IOException { NioDatagramChannel channel = new NioDatagramChannel(port, handler); channel.bind(); channels.add(channel); return channel; } } java-design-patterns-1.18.0/reactor/src/main/java/com/iluwatar/reactor/app/AppClient.java000066400000000000000000000142441322244523500313000ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reactor.app; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.PrintWriter; import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.InetAddress; import java.net.InetSocketAddress; import java.net.Socket; import java.net.UnknownHostException; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; /** * Represents the clients of Reactor pattern. Multiple clients are run concurrently and send logging * requests to Reactor. */ public class AppClient { private static final Logger LOGGER = LoggerFactory.getLogger(AppClient.class); private final ExecutorService service = Executors.newFixedThreadPool(4); /** * App client entry. * * @throws IOException if any I/O error occurs. */ public static void main(String[] args) throws IOException { AppClient appClient = new AppClient(); appClient.start(); } /** * Starts the logging clients. * * @throws IOException if any I/O error occurs. */ public void start() throws IOException { LOGGER.info("Starting logging clients"); service.execute(new TcpLoggingClient("Client 1", 6666)); service.execute(new TcpLoggingClient("Client 2", 6667)); service.execute(new UdpLoggingClient("Client 3", 6668)); service.execute(new UdpLoggingClient("Client 4", 6668)); } /** * Stops logging clients. This is a blocking call. */ public void stop() { service.shutdown(); if (!service.isTerminated()) { service.shutdownNow(); try { service.awaitTermination(1000, TimeUnit.SECONDS); } catch (InterruptedException e) { LOGGER.error("exception awaiting termination", e); } } LOGGER.info("Logging clients stopped"); } private static void artificialDelayOf(long millis) { try { Thread.sleep(millis); } catch (InterruptedException e) { LOGGER.error("sleep interrupted", e); } } /** * A logging client that sends requests to Reactor on TCP socket. */ static class TcpLoggingClient implements Runnable { private final int serverPort; private final String clientName; /** * Creates a new TCP logging client. * * @param clientName the name of the client to be sent in logging requests. * @param port the port on which client will send logging requests. */ public TcpLoggingClient(String clientName, int serverPort) { this.clientName = clientName; this.serverPort = serverPort; } public void run() { try (Socket socket = new Socket(InetAddress.getLocalHost(), serverPort)) { OutputStream outputStream = socket.getOutputStream(); PrintWriter writer = new PrintWriter(outputStream); sendLogRequests(writer, socket.getInputStream()); } catch (IOException e) { LOGGER.error("error sending requests", e); throw new RuntimeException(e); } } private void sendLogRequests(PrintWriter writer, InputStream inputStream) throws IOException { for (int i = 0; i < 4; i++) { writer.println(clientName + " - Log request: " + i); writer.flush(); byte[] data = new byte[1024]; int read = inputStream.read(data, 0, data.length); if (read == 0) { LOGGER.info("Read zero bytes"); } else { LOGGER.info(new String(data, 0, read)); } artificialDelayOf(100); } } } /** * A logging client that sends requests to Reactor on UDP socket. */ static class UdpLoggingClient implements Runnable { private final String clientName; private final InetSocketAddress remoteAddress; /** * Creates a new UDP logging client. * * @param clientName the name of the client to be sent in logging requests. * @param port the port on which client will send logging requests. * @throws UnknownHostException if localhost is unknown */ public UdpLoggingClient(String clientName, int port) throws UnknownHostException { this.clientName = clientName; this.remoteAddress = new InetSocketAddress(InetAddress.getLocalHost(), port); } @Override public void run() { try (DatagramSocket socket = new DatagramSocket()) { for (int i = 0; i < 4; i++) { String message = clientName + " - Log request: " + i; DatagramPacket request = new DatagramPacket(message.getBytes(), message.getBytes().length, remoteAddress); socket.send(request); byte[] data = new byte[1024]; DatagramPacket reply = new DatagramPacket(data, data.length); socket.receive(reply); if (reply.getLength() == 0) { LOGGER.info("Read zero bytes"); } else { LOGGER.info(new String(reply.getData(), 0, reply.getLength())); } artificialDelayOf(100); } } catch (IOException e1) { LOGGER.error("error sending packets", e1); } } } } java-design-patterns-1.18.0/reactor/src/main/java/com/iluwatar/reactor/app/LoggingHandler.java000066400000000000000000000064721322244523500323110ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reactor.app; import java.nio.ByteBuffer; import java.nio.channels.SelectionKey; import com.iluwatar.reactor.framework.AbstractNioChannel; import com.iluwatar.reactor.framework.ChannelHandler; import com.iluwatar.reactor.framework.NioDatagramChannel.DatagramPacket; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Logging server application logic. It logs the incoming requests on standard console and returns a * canned acknowledgement back to the remote peer. */ public class LoggingHandler implements ChannelHandler { private static final Logger LOGGER = LoggerFactory.getLogger(LoggingHandler.class); private static final byte[] ACK = "Data logged successfully".getBytes(); /** * Decodes the received data and logs it on standard console. */ @Override public void handleChannelRead(AbstractNioChannel channel, Object readObject, SelectionKey key) { /* * As this handler is attached with both TCP and UDP channels we need to check whether the data * received is a ByteBuffer (from TCP channel) or a DatagramPacket (from UDP channel). */ if (readObject instanceof ByteBuffer) { doLogging((ByteBuffer) readObject); sendReply(channel, key); } else if (readObject instanceof DatagramPacket) { DatagramPacket datagram = (DatagramPacket) readObject; doLogging(datagram.getData()); sendReply(channel, datagram, key); } else { throw new IllegalStateException("Unknown data received"); } } private static void sendReply(AbstractNioChannel channel, DatagramPacket incomingPacket, SelectionKey key) { /* * Create a reply acknowledgement datagram packet setting the receiver to the sender of incoming * message. */ DatagramPacket replyPacket = new DatagramPacket(ByteBuffer.wrap(ACK)); replyPacket.setReceiver(incomingPacket.getSender()); channel.write(replyPacket, key); } private static void sendReply(AbstractNioChannel channel, SelectionKey key) { ByteBuffer buffer = ByteBuffer.wrap(ACK); channel.write(buffer, key); } private static void doLogging(ByteBuffer data) { // assuming UTF-8 :( LOGGER.info(new String(data.array(), 0, data.limit())); } } java-design-patterns-1.18.0/reactor/src/main/java/com/iluwatar/reactor/framework/000077500000000000000000000000001322244523500277665ustar00rootroot00000000000000AbstractNioChannel.java000066400000000000000000000137421322244523500342630ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/src/main/java/com/iluwatar/reactor/framework/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reactor.framework; import java.io.IOException; import java.nio.channels.SelectableChannel; import java.nio.channels.SelectionKey; import java.nio.channels.Selector; import java.util.Map; import java.util.Queue; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.ConcurrentLinkedQueue; /** * This represents the Handle of Reactor pattern. These are resources managed by OS which can * be submitted to {@link NioReactor}. * *

* This class serves has the responsibility of reading the data when a read event occurs and writing * the data back when the channel is writable. It leaves the reading and writing of data on the * concrete implementation. It provides a block writing mechanism wherein when any * {@link ChannelHandler} wants to write data back, it queues the data in pending write queue and * clears it in block manner. This provides better throughput. */ public abstract class AbstractNioChannel { private final SelectableChannel channel; private final ChannelHandler handler; private final Map> channelToPendingWrites = new ConcurrentHashMap<>(); private NioReactor reactor; /** * Creates a new channel. * * @param handler which will handle events occurring on this channel. * @param channel a NIO channel to be wrapped. */ public AbstractNioChannel(ChannelHandler handler, SelectableChannel channel) { this.handler = handler; this.channel = channel; } /** * Injects the reactor in this channel. */ void setReactor(NioReactor reactor) { this.reactor = reactor; } /** * @return the wrapped NIO channel. */ public SelectableChannel getJavaChannel() { return channel; } /** * The operation in which the channel is interested, this operation is provided to * {@link Selector}. * * @return interested operation. * @see SelectionKey */ public abstract int getInterestedOps(); /** * Binds the channel on provided port. * * @throws IOException if any I/O error occurs. */ public abstract void bind() throws IOException; /** * Reads the data using the key and returns the read data. The underlying channel should be * fetched using {@link SelectionKey#channel()}. * * @param key the key on which read event occurred. * @return data read. * @throws IOException if any I/O error occurs. */ public abstract Object read(SelectionKey key) throws IOException; /** * @return the handler associated with this channel. */ public ChannelHandler getHandler() { return handler; } /* * Called from the context of reactor thread when the key becomes writable. The channel writes the * whole pending block of data at once. */ void flush(SelectionKey key) throws IOException { Queue pendingWrites = channelToPendingWrites.get(key.channel()); while (true) { Object pendingWrite = pendingWrites.poll(); if (pendingWrite == null) { // We don't have anything more to write so channel is interested in reading more data reactor.changeOps(key, SelectionKey.OP_READ); break; } // ask the concrete channel to make sense of data and write it to java channel doWrite(pendingWrite, key); } } /** * Writes the data to the channel. * * @param pendingWrite the data to be written on channel. * @param key the key which is writable. * @throws IOException if any I/O error occurs. */ protected abstract void doWrite(Object pendingWrite, SelectionKey key) throws IOException; /** * Queues the data for writing. The data is not guaranteed to be written on underlying channel * when this method returns. It will be written when the channel is flushed. * *

* This method is used by the {@link ChannelHandler} to send reply back to the client.
* Example: * * 

   * 
   * {@literal @}Override
   * public void handleChannelRead(AbstractNioChannel channel, Object readObject, SelectionKey key) {
   *   byte[] data = ((ByteBuffer)readObject).array();
   *   ByteBuffer buffer = ByteBuffer.wrap("Server reply".getBytes());
   *   channel.write(buffer, key);
   * }
   * 
   *
* * @param data the data to be written on underlying channel. * @param key the key which is writable. */ public void write(Object data, SelectionKey key) { Queue pendingWrites = this.channelToPendingWrites.get(key.channel()); if (pendingWrites == null) { synchronized (this.channelToPendingWrites) { pendingWrites = this.channelToPendingWrites.get(key.channel()); if (pendingWrites == null) { pendingWrites = new ConcurrentLinkedQueue<>(); this.channelToPendingWrites.put(key.channel(), pendingWrites); } } } pendingWrites.add(data); reactor.changeOps(key, SelectionKey.OP_WRITE); } } java-design-patterns-1.18.0/reactor/src/main/java/com/iluwatar/reactor/framework/ChannelHandler.java000066400000000000000000000037211322244523500335020ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reactor.framework; import java.nio.channels.SelectionKey; /** * Represents the EventHandler of Reactor pattern. It handles the incoming events dispatched * to it by the {@link Dispatcher}. This is where the application logic resides. * *

* A {@link ChannelHandler} can be associated with one or many {@link AbstractNioChannel}s, and * whenever an event occurs on any of the associated channels, the handler is notified of the event. */ public interface ChannelHandler { /** * Called when the {@code channel} receives some data from remote peer. * * @param channel the channel from which the data was received. * @param readObject the data read. * @param key the key on which read event occurred. */ void handleChannelRead(AbstractNioChannel channel, Object readObject, SelectionKey key); } java-design-patterns-1.18.0/reactor/src/main/java/com/iluwatar/reactor/framework/Dispatcher.java000066400000000000000000000054041322244523500327220ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reactor.framework; import java.nio.channels.SelectionKey; /** * Represents the event dispatching strategy. When {@link NioReactor} senses any event on the * registered {@link AbstractNioChannel}s then it de-multiplexes the event type, read or write or * connect, and then calls the {@link Dispatcher} to dispatch the read events. This decouples the * I/O processing from application specific processing.
* Dispatcher should call the {@link ChannelHandler} associated with the channel on which event * occurred. * *

* The application can customize the way in which event is dispatched such as using the reactor * thread to dispatch event to channels or use a worker pool to do the non I/O processing. * * @see SameThreadDispatcher * @see ThreadPoolDispatcher */ public interface Dispatcher { /** * This hook method is called when read event occurs on particular channel. The data read is * provided in readObject. The implementation should dispatch this read event to the * associated {@link ChannelHandler} of channel. * *

* The type of readObject depends on the channel on which data was received. * * @param channel on which read event occurred * @param readObject object read by channel * @param key on which event occurred */ void onChannelReadEvent(AbstractNioChannel channel, Object readObject, SelectionKey key); /** * Stops dispatching events and cleans up any acquired resources such as threads. * * @throws InterruptedException if interrupted while stopping dispatcher. */ void stop() throws InterruptedException; } NioDatagramChannel.java000066400000000000000000000133521322244523500342350ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/src/main/java/com/iluwatar/reactor/framework/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reactor.framework; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.IOException; import java.net.InetAddress; import java.net.InetSocketAddress; import java.net.SocketAddress; import java.nio.ByteBuffer; import java.nio.channels.DatagramChannel; import java.nio.channels.SelectionKey; /** * A wrapper over {@link DatagramChannel} which can read and write data on a DatagramChannel. */ public class NioDatagramChannel extends AbstractNioChannel { private static final Logger LOGGER = LoggerFactory.getLogger(NioDatagramChannel.class); private final int port; /** * Creates a {@link DatagramChannel} which will bind at provided port and use handler * to handle incoming events on this channel. *

* Note the constructor does not bind the socket, {@link #bind()} method should be called for * binding the socket. * * @param port the port to be bound to listen for incoming datagram requests. * @param handler the handler to be used for handling incoming requests on this channel. * @throws IOException if any I/O error occurs. */ public NioDatagramChannel(int port, ChannelHandler handler) throws IOException { super(handler, DatagramChannel.open()); this.port = port; } @Override public int getInterestedOps() { /* * there is no need to accept connections in UDP, so the channel shows interest in reading data. */ return SelectionKey.OP_READ; } /** * Reads and returns a {@link DatagramPacket} from the underlying channel. * * @return the datagram packet read having the sender address. */ @Override public DatagramPacket read(SelectionKey key) throws IOException { ByteBuffer buffer = ByteBuffer.allocate(1024); SocketAddress sender = ((DatagramChannel) key.channel()).receive(buffer); /* * It is required to create a DatagramPacket because we need to preserve which socket address * acts as destination for sending reply packets. */ buffer.flip(); DatagramPacket packet = new DatagramPacket(buffer); packet.setSender(sender); return packet; } /** * @return the underlying datagram channel. */ @Override public DatagramChannel getJavaChannel() { return (DatagramChannel) super.getJavaChannel(); } /** * Binds UDP socket on the provided port. * * @throws IOException if any I/O error occurs. */ @Override public void bind() throws IOException { getJavaChannel().socket().bind(new InetSocketAddress(InetAddress.getLocalHost(), port)); getJavaChannel().configureBlocking(false); LOGGER.info("Bound UDP socket at port: {}", port); } /** * Writes the pending {@link DatagramPacket} to the underlying channel sending data to the * intended receiver of the packet. */ @Override protected void doWrite(Object pendingWrite, SelectionKey key) throws IOException { DatagramPacket pendingPacket = (DatagramPacket) pendingWrite; getJavaChannel().send(pendingPacket.getData(), pendingPacket.getReceiver()); } /** * Writes the outgoing {@link DatagramPacket} to the channel. The intended receiver of the * datagram packet must be set in the data using * {@link DatagramPacket#setReceiver(SocketAddress)}. */ @Override public void write(Object data, SelectionKey key) { super.write(data, key); } /** * Container of data used for {@link NioDatagramChannel} to communicate with remote peer. */ public static class DatagramPacket { private SocketAddress sender; private ByteBuffer data; private SocketAddress receiver; /** * Creates a container with underlying data. * * @param data the underlying message to be written on channel. */ public DatagramPacket(ByteBuffer data) { this.data = data; } /** * @return the sender address. */ public SocketAddress getSender() { return sender; } /** * Sets the sender address of this packet. * * @param sender the sender address. */ public void setSender(SocketAddress sender) { this.sender = sender; } /** * @return the receiver address. */ public SocketAddress getReceiver() { return receiver; } /** * Sets the intended receiver address. This must be set when writing to the channel. * * @param receiver the receiver address. */ public void setReceiver(SocketAddress receiver) { this.receiver = receiver; } /** * @return the underlying message that will be written on channel. */ public ByteBuffer getData() { return data; } } } java-design-patterns-1.18.0/reactor/src/main/java/com/iluwatar/reactor/framework/NioReactor.java000066400000000000000000000224501322244523500327010ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reactor.framework; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.IOException; import java.nio.channels.SelectionKey; import java.nio.channels.Selector; import java.nio.channels.ServerSocketChannel; import java.nio.channels.SocketChannel; import java.util.Iterator; import java.util.Queue; import java.util.Set; import java.util.concurrent.ConcurrentLinkedQueue; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; /** * This class acts as Synchronous Event De-multiplexer and Initiation Dispatcher of Reactor pattern. Multiple handles * i.e. {@link AbstractNioChannel}s can be registered to the reactor and it blocks for events from all these handles. * Whenever an event occurs on any of the registered handles, it synchronously de-multiplexes the event which can be any * of read, write or accept, and dispatches the event to the appropriate {@link ChannelHandler} using the * {@link Dispatcher}. * *

* Implementation: A NIO reactor runs in its own thread when it is started using {@link #start()} method. * {@link NioReactor} uses {@link Selector} for realizing Synchronous Event De-multiplexing. * *

* NOTE: This is one of the ways to implement NIO reactor and it does not take care of all possible edge cases which are * required in a real application. This implementation is meant to demonstrate the fundamental concepts that lie behind * Reactor pattern. */ public class NioReactor { private static final Logger LOGGER = LoggerFactory.getLogger(NioReactor.class); private final Selector selector; private final Dispatcher dispatcher; /** * All the work of altering the SelectionKey operations and Selector operations are performed in the context of main * event loop of reactor. So when any channel needs to change its readability or writability, a new command is added * in the command queue and then the event loop picks up the command and executes it in next iteration. */ private final Queue pendingCommands = new ConcurrentLinkedQueue<>(); private final ExecutorService reactorMain = Executors.newSingleThreadExecutor(); /** * Creates a reactor which will use provided {@code dispatcher} to dispatch events. The application can provide * various implementations of dispatcher which suits its needs. * * @param dispatcher * a non-null dispatcher used to dispatch events on registered channels. * @throws IOException * if any I/O error occurs. */ public NioReactor(Dispatcher dispatcher) throws IOException { this.dispatcher = dispatcher; this.selector = Selector.open(); } /** * Starts the reactor event loop in a new thread. * * @throws IOException * if any I/O error occurs. */ public void start() throws IOException { reactorMain.execute(() -> { try { LOGGER.info("Reactor started, waiting for events..."); eventLoop(); } catch (IOException e) { LOGGER.error("exception in event loop", e); } }); } /** * Stops the reactor and related resources such as dispatcher. * * @throws InterruptedException * if interrupted while stopping the reactor. * @throws IOException * if any I/O error occurs. */ public void stop() throws InterruptedException, IOException { reactorMain.shutdownNow(); selector.wakeup(); reactorMain.awaitTermination(4, TimeUnit.SECONDS); selector.close(); LOGGER.info("Reactor stopped"); } /** * Registers a new channel (handle) with this reactor. Reactor will start waiting for events on this channel and * notify of any events. While registering the channel the reactor uses {@link AbstractNioChannel#getInterestedOps()} * to know about the interested operation of this channel. * * @param channel * a new channel on which reactor will wait for events. The channel must be bound prior to being registered. * @return this * @throws IOException * if any I/O error occurs. */ public NioReactor registerChannel(AbstractNioChannel channel) throws IOException { SelectionKey key = channel.getJavaChannel().register(selector, channel.getInterestedOps()); key.attach(channel); channel.setReactor(this); return this; } private void eventLoop() throws IOException { while (true) { // honor interrupt request if (Thread.interrupted()) { break; } // honor any pending commands first processPendingCommands(); /* * Synchronous event de-multiplexing happens here, this is blocking call which returns when it is possible to * initiate non-blocking operation on any of the registered channels. */ selector.select(); /* * Represents the events that have occurred on registered handles. */ Set keys = selector.selectedKeys(); Iterator iterator = keys.iterator(); while (iterator.hasNext()) { SelectionKey key = iterator.next(); if (!key.isValid()) { iterator.remove(); continue; } processKey(key); } keys.clear(); } } private void processPendingCommands() { Iterator iterator = pendingCommands.iterator(); while (iterator.hasNext()) { Runnable command = iterator.next(); command.run(); iterator.remove(); } } /* * Initiation dispatcher logic, it checks the type of event and notifier application specific event handler to handle * the event. */ private void processKey(SelectionKey key) throws IOException { if (key.isAcceptable()) { onChannelAcceptable(key); } else if (key.isReadable()) { onChannelReadable(key); } else if (key.isWritable()) { onChannelWritable(key); } } private static void onChannelWritable(SelectionKey key) throws IOException { AbstractNioChannel channel = (AbstractNioChannel) key.attachment(); channel.flush(key); } private void onChannelReadable(SelectionKey key) { try { // reads the incoming data in context of reactor main loop. Can this be improved? Object readObject = ((AbstractNioChannel) key.attachment()).read(key); dispatchReadEvent(key, readObject); } catch (IOException e) { try { key.channel().close(); } catch (IOException e1) { LOGGER.error("error closing channel", e1); } } } /* * Uses the application provided dispatcher to dispatch events to application handler. */ private void dispatchReadEvent(SelectionKey key, Object readObject) { dispatcher.onChannelReadEvent((AbstractNioChannel) key.attachment(), readObject, key); } private void onChannelAcceptable(SelectionKey key) throws IOException { ServerSocketChannel serverSocketChannel = (ServerSocketChannel) key.channel(); SocketChannel socketChannel = serverSocketChannel.accept(); socketChannel.configureBlocking(false); SelectionKey readKey = socketChannel.register(selector, SelectionKey.OP_READ); readKey.attach(key.attachment()); } /** * Queues the change of operations request of a channel, which will change the interested operations of the channel * sometime in future. *

* This is a non-blocking method and does not guarantee that the operations have changed when this method returns. * * @param key * the key for which operations have to be changed. * @param interestedOps * the new interest operations. */ public void changeOps(SelectionKey key, int interestedOps) { pendingCommands.add(new ChangeKeyOpsCommand(key, interestedOps)); selector.wakeup(); } /** * A command that changes the interested operations of the key provided. */ class ChangeKeyOpsCommand implements Runnable { private SelectionKey key; private int interestedOps; public ChangeKeyOpsCommand(SelectionKey key, int interestedOps) { this.key = key; this.interestedOps = interestedOps; } public void run() { key.interestOps(interestedOps); } @Override public String toString() { return "Change of ops to: " + interestedOps; } } } NioServerSocketChannel.java000066400000000000000000000102521322244523500351300ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/src/main/java/com/iluwatar/reactor/framework/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reactor.framework; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.IOException; import java.net.InetAddress; import java.net.InetSocketAddress; import java.nio.ByteBuffer; import java.nio.channels.SelectionKey; import java.nio.channels.ServerSocketChannel; import java.nio.channels.SocketChannel; /** * A wrapper over {@link NioServerSocketChannel} which can read and write data on a * {@link SocketChannel}. */ public class NioServerSocketChannel extends AbstractNioChannel { private static final Logger LOGGER = LoggerFactory.getLogger(NioServerSocketChannel.class); private final int port; /** * Creates a {@link ServerSocketChannel} which will bind at provided port and use * handler to handle incoming events on this channel. *

* Note the constructor does not bind the socket, {@link #bind()} method should be called for * binding the socket. * * @param port the port on which channel will be bound to accept incoming connection requests. * @param handler the handler that will handle incoming requests on this channel. * @throws IOException if any I/O error occurs. */ public NioServerSocketChannel(int port, ChannelHandler handler) throws IOException { super(handler, ServerSocketChannel.open()); this.port = port; } @Override public int getInterestedOps() { // being a server socket channel it is interested in accepting connection from remote peers. return SelectionKey.OP_ACCEPT; } /** * @return the underlying {@link ServerSocketChannel}. */ @Override public ServerSocketChannel getJavaChannel() { return (ServerSocketChannel) super.getJavaChannel(); } /** * Reads and returns {@link ByteBuffer} from the underlying {@link SocketChannel} represented by * the key. Due to the fact that there is a dedicated channel for each client * connection we don't need to store the sender. */ @Override public ByteBuffer read(SelectionKey key) throws IOException { SocketChannel socketChannel = (SocketChannel) key.channel(); ByteBuffer buffer = ByteBuffer.allocate(1024); int read = socketChannel.read(buffer); buffer.flip(); if (read == -1) { throw new IOException("Socket closed"); } return buffer; } /** * Binds TCP socket on the provided port. * * @throws IOException if any I/O error occurs. */ @Override public void bind() throws IOException { ((ServerSocketChannel) getJavaChannel()).socket().bind( new InetSocketAddress(InetAddress.getLocalHost(), port)); ((ServerSocketChannel) getJavaChannel()).configureBlocking(false); LOGGER.info("Bound TCP socket at port: {}", port); } /** * Writes the pending {@link ByteBuffer} to the underlying channel sending data to the intended * receiver of the packet. */ @Override protected void doWrite(Object pendingWrite, SelectionKey key) throws IOException { ByteBuffer pendingBuffer = (ByteBuffer) pendingWrite; ((SocketChannel) key.channel()).write(pendingBuffer); } } SameThreadDispatcher.java000066400000000000000000000043341322244523500346020ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/src/main/java/com/iluwatar/reactor/framework/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reactor.framework; import java.nio.channels.SelectionKey; /** * Dispatches the events in the context of caller thread. This implementation is a good fit for * small applications where there are limited clients. Using this implementation limits the * scalability because the I/O thread performs the application specific processing. * *

* For better performance use {@link ThreadPoolDispatcher}. * * @see ThreadPoolDispatcher */ public class SameThreadDispatcher implements Dispatcher { /** * Dispatches the read event in the context of caller thread.
* Note this is a blocking call. It returns only after the associated handler has handled the read * event. */ @Override public void onChannelReadEvent(AbstractNioChannel channel, Object readObject, SelectionKey key) { /* * Calls the associated handler to notify the read event where application specific code * resides. */ channel.getHandler().handleChannelRead(channel, readObject, key); } /** * No resources to free. */ @Override public void stop() { // no-op } } ThreadPoolDispatcher.java000066400000000000000000000052271322244523500346300ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/src/main/java/com/iluwatar/reactor/framework/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reactor.framework; import java.nio.channels.SelectionKey; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; /** * An implementation that uses a pool of worker threads to dispatch the events. This provides better * scalability as the application specific processing is not performed in the context of I/O * (reactor) thread. */ public class ThreadPoolDispatcher implements Dispatcher { private final ExecutorService executorService; /** * Creates a pooled dispatcher with tunable pool size. * * @param poolSize number of pooled threads */ public ThreadPoolDispatcher(int poolSize) { this.executorService = Executors.newFixedThreadPool(poolSize); } /** * Submits the work of dispatching the read event to worker pool, where it gets picked up by * worker threads.
* Note that this is a non-blocking call and returns immediately. It is not guaranteed that the * event has been handled by associated handler. */ @Override public void onChannelReadEvent(AbstractNioChannel channel, Object readObject, SelectionKey key) { executorService.execute(() -> channel.getHandler().handleChannelRead(channel, readObject, key)); } /** * Stops the pool of workers. * * @throws InterruptedException if interrupted while stopping pool of workers. */ @Override public void stop() throws InterruptedException { executorService.shutdown(); executorService.awaitTermination(4, TimeUnit.SECONDS); } } java-design-patterns-1.18.0/reactor/src/test/000077500000000000000000000000001322244523500210365ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/src/test/java/000077500000000000000000000000001322244523500217575ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/src/test/java/com/000077500000000000000000000000001322244523500225355ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500243655ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/src/test/java/com/iluwatar/reactor/000077500000000000000000000000001322244523500260245ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/src/test/java/com/iluwatar/reactor/app/000077500000000000000000000000001322244523500266045ustar00rootroot00000000000000java-design-patterns-1.18.0/reactor/src/test/java/com/iluwatar/reactor/app/ReactorTest.java000066400000000000000000000062631322244523500317150ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reactor.app; import com.iluwatar.reactor.framework.SameThreadDispatcher; import com.iluwatar.reactor.framework.ThreadPoolDispatcher; import org.junit.jupiter.api.Test; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.IOException; /** * * This class tests the Distributed Logging service by starting a Reactor and then sending it * concurrent logging requests using multiple clients. */ public class ReactorTest { private static final Logger LOGGER = LoggerFactory.getLogger(ReactorTest.class); /** * Test the application using pooled thread dispatcher. * * @throws IOException if any I/O error occurs. * @throws InterruptedException if interrupted while stopping the application. */ @Test public void testAppUsingThreadPoolDispatcher() throws IOException, InterruptedException { LOGGER.info("testAppUsingThreadPoolDispatcher start"); App app = new App(new ThreadPoolDispatcher(2)); app.start(); AppClient client = new AppClient(); client.start(); // allow clients to send requests. Artificial delay. try { Thread.sleep(2000); } catch (InterruptedException e) { LOGGER.error("sleep interrupted", e); } client.stop(); app.stop(); LOGGER.info("testAppUsingThreadPoolDispatcher stop"); } /** * Test the application using same thread dispatcher. * * @throws IOException if any I/O error occurs. * @throws InterruptedException if interrupted while stopping the application. */ @Test public void testAppUsingSameThreadDispatcher() throws IOException, InterruptedException { LOGGER.info("testAppUsingSameThreadDispatcher start"); App app = new App(new SameThreadDispatcher()); app.start(); AppClient client = new AppClient(); client.start(); // allow clients to send requests. Artificial delay. try { Thread.sleep(2000); } catch (InterruptedException e) { LOGGER.error("sleep interrupted", e); } client.stop(); app.stop(); LOGGER.info("testAppUsingSameThreadDispatcher stop"); } } java-design-patterns-1.18.0/reader-writer-lock/000077500000000000000000000000001322244523500213335ustar00rootroot00000000000000java-design-patterns-1.18.0/reader-writer-lock/README.md000066400000000000000000000025011322244523500226100ustar00rootroot00000000000000--- layout: pattern title: Reader Writer Lock folder: reader-writer-lock permalink: /patterns/reader-writer-lock/ categories: Concurrency tags: - Java - Difficulty-Intermediate - I/O - Performance --- **Intent:** Suppose we have a shared memory area with the basic constraints detailed above. It is possible to protect the shared data behind a mutual exclusion mutex, in which case no two threads can access the data at the same time. However, this solution is suboptimal, because it is possible that a reader R1 might have the lock, and then another reader R2 requests access. It would be foolish for R2 to wait until R1 was done before starting its own read operation; instead, R2 should start right away. This is the motivation for the Reader Writer Lock pattern. ![alt text](./etc/reader-writer-lock.png "Reader writer lock") **Applicability:** Application need to increase the performance of resource synchronize for multiple thread, in particularly there are mixed read/write operations. **Real world examples:** * [Java Reader Writer Lock](https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/locks/ReadWriteLock.html) **Credits** * [Readers–writer lock](https://en.wikipedia.org/wiki/Readers%E2%80%93writer_lock) * [Readers–writers_problem](https://en.wikipedia.org/wiki/Readers%E2%80%93writers_problem)java-design-patterns-1.18.0/reader-writer-lock/etc/000077500000000000000000000000001322244523500221065ustar00rootroot00000000000000java-design-patterns-1.18.0/reader-writer-lock/etc/reader-writer-lock.png000066400000000000000000001153071322244523500263250ustar00rootroot00000000000000PNG  IHDRc+\IDATx} X6J* 5WDQ1W\qWK5pW/bŨIܣhEJvk6azsytqHHHHHHH ;@BBBBBi!$!!!!!1&cHQ0q6T hVsأO{Lt`wM&TYh2!G!{h 4 \&$(ĔvR!f˄%1a>혀ByTڼ /zo"Es:O*|XtZ*z%`ԨOF~f7ިaNĔ)a$?_v )SxqOULՍNݾG;=yrpDp:8g鴭8E m{SJ6B}xWt鸇ӍdM'aԁrJpzX6 10;b%,]]]PF>}U>^8:iREF Q:S@kBi[юE ո=)mznLޭ9|xUN-Kv?rd0sꨍ!ʕ^s~cX&2*xpܻjT)wTk?O7#ر9L2FftV))$8S\SƝ1qc_Ƶ4½ّE揼z-6Rcİ5*٫&>pKkU:̱)Ӷbs{ )mz^.S2`CFÜc- =7_c[Sڇ1Dop 昒`)) pHdy3ĔvbJ$)mz 1݃@0 gJ# 1݃@0̔ 6RS:)  $X bJ1%`ĔKaOLcaqc,h9[ÑF{)S AC`))c.艉Q H7|yg2ŋrF?Ĕ9 ' }C?h^bJQk<㌽S?=Џ^< N;kկ_?|WBgH:sZSv;gd*׮}6zt/]ޖNmE#*d$"EѮ]sFZrTسg{&W^ m/6%) S|81S&?L6;:?oI.xfRS!'++i%.b,]i<i[т Y9_Llk?X&j|(΂Y0 5dI7.Ĕz낐S]ހ C[%/NhO巟_m o#kkɓ#rapF9dHLa\ ڴ~\_^sF1ԧ,Fί|Db5kV3g{ޥ%SZ9_Ly~atCjz+[dJexpX>QC˖.'gJs4wJ3%ȻY8/_߆ǏD%ʕˢc,l)fכo֑Go zyo)w_wt#: q2MÁ> +|r:_L !KkNIHNApa /XʟYsv._kժ֤QWxjH̞)WJ"Bs߱cWL:_1EP թSťPooЂ:KhgJ35 Zj+M6”iTsUK uyzHt$cʛ7֭3mĔvކ5(gp— 1DdF^jWV-ZÕɡnK޽T\ս:0|̖Nr%3} ݾ}SIgآE .l>P1uJfj#j&X:Y[ Hi9Zə|&bJwuu _%ϞM`4,n=ƔUk۶8ZaD ׅ׈h)qznĹإ߮wn7`ӗ;NndEAXXxP֫xY~ >kԨ u^eȾ̛7i&`/~\IR֠SZ9( !5t Y27ot~p)7 k4S&&"Et `H!)ȷΟͯ ~y(S47[w{5whD¤ [7mc:gt 䤧@+s@/n ٗH׬YϯǏ?T֠SZ9fzXCj*c:vlk-T 2`FJ 1%\g䇆p@bn ;3%{Zmseb®_p90%np&X9?ܼ;yX{`* ȁsq)r`¤ ,?Jn_ʗ/_dtX|/*k)Qss|45`d7Tmw4cCV!ͣFF([i!pa2{\̆ kJ9jܸ+9x;0O1%DMNJ抑Ү_p90%0#S0lJҬ?'ҽVn63݇g{Ma>"/jUƯnaJ`8PՄ ߏϺ-ѻ}޶mnʹs H{{{6:wncLp nOCn,(h2cJ5-xƬ0Nih3Ds8_Ȕ}OLl~]{-vRҙ t(S&ALIĔbJ$) ҡ@LI 1%RSn>Gz9d\Ǐ3ԩ)[g3LJlWbJ@JkTQڼ1%RS>}zѣt+~6:*vRS 5Ĕȷ0͔q$22}~f'F ܹUo@ǯW_r~>|xaޏf.]Λ7B]m6Bϯٝ;JZϜقf7nٳ}׮> d;f+zl8>O3^sX<}ի<wovft^}ժ}4rĈ͛,t֭3kb}u<|@^A a4?S!?jWWE60LIoA1%~Ȑ W&رu8aSX2CF_SJ9F';;8I#󸯸ϷuZժ4+LFT$f_EYС݂7[nf{.\l^Q&3:TG9zϧs޼722%))mC#LIoӅMhmk_qe}1M=fH+8:͓띠򨜁٢ ëĔFL=4”6]؄6ߦbJ$4”6ݎަS:) St;zNLP $LB#LIo%yNLP $LB#L@os.!{S&)$LY= &@HH4+6L)NS:ȧ$L ]v bJ1%`ĔKALP $L`)) ĔI2v*wĔv'bJ{í[W!eBׅV>+i>=,,/3q& !cS2:Q)yJ-<d eDcē'NXD*UU\gׯC_~ 4{ $X 1%.k>tǏ3ň)-1%ELY` <QI;j׮b)k hqIqIlp/W"h4rUz $X 7lt;0y{{1=;2.nSwԩeZ*cG(֭+4rw/_%L([6edl ORÆuLvƾ-8i^vӶb J6l >+R`Dܵkn᥍ӛ3py?ٹ xkŊYC10x_mi\cW!j^֬RjO?%z/ŋǀ)kԨѥx:2++sVNG\'5bJP)at'1e<رuȉwGf~s4Tk||4|MX .^Ltss]~I{7t.>N lh{Ӛ4"IM{q'J3kTH'7o&+jݹs&…]J=KS *BuMN^Ę23s5ۯR 4 5+m8 S^5TO[Pzy<9",,LǍ 2<S=}R3y ĔKvAr S[nɒ˗/ LɟZ5ܽ ?m/d GQmf``83VС Kno鴭XBr=j,b`d QdL)<\^?cg2A6`3*>yrSX -m9Le._>l R,T_9w. !͙RآR3q[o%譖!S^84sWrc{ꐐÂBժUYo8U=eدrJr G|^n: aa9#caD7ehܮ߆i[Fz" uM:>>p$]1cz],py)ׯ'L޿;~%SfdcJap&[n`O*ˌ ցY+ sLbJ $9dJ^Ri ukŊq+, )2)C?fW` G|wS)ڵ polxn.]Fh^K3FU߆i[Fz" d`o݌={Keo͛g0 <\^?g]vP!gJΝsRX9kժy"!<} >h67o&߾ *9܌Cأg v9w.#C&0'61iiT_;i[Fz"Ԋ G6 \x5kx<0\lE.dʇKrCU83 0̋ i[" bSr{?B_Z'U^}Ef=,Z6m gJaJ=Bjvʔ*:)KK722bJ8p f1f0IG#.܀H`.*?ՃQ^^Q!]D~Gã8ތXvӶb{J'R+emYѢsȇgPG^WB8P0ȀQQ)h,Gy, 1 vL={g RDZ^:lQ\'52e-y K`p٥nWD9LPn^R9Ϟe*cɚTB`ƕρ q,$2WNO_k㧣LC̔yX3Q2?ԩvpmm!{S:Yzu{LPZfʼyO?bJ1%`ZfʼyO?bJ1%`eJKa{!hĔbJ$) ybJ1%`ĔKALP $L`))G@bJ_8 ) /zyU,U[&Ogʰ{WESZ $w廉˗XP[7_kv3?[=VPN`Ԩʍ9;e ЁbJ{\DeHxq߫VS2N]}=SZ$)9е!"߿۷_-|(sVGR?~ubJP)Owxx',핕䞕6;Jv…]m6…!6R?s?τO|~˶0]+\yFоvaJ'Nl`z=>[k<̂pƹ\KΔ@l2fm.9ٹ)c/١r̙-F.6WiL)3%FO ܥ˫MQ@'p?nذGqɓp>yrHYش^mkΨs1eGNNҥcϝKhڴvժ6kӶb ) #*C+ q$;w%`)( _&hpyoҖ4aP?/]5/6WiL)i Dp/^qGvnr.q}vai\P@y!g.)$߀_n \tJO&SZ#֨2!3k2̂p֩S(TIhHmm.֭3AQ^0ĔFNY h GȆ}zp{44$Lrા?MJťo3%߀_n 3ĉa,n15b ) !#c%gJ>&,g\2++dI7ʠ ͸_{oHV@P?;)mu]h D2%/)dJn'^^Rɔa׮9cL )dBB t?>>F0ܠ93%Ya3nhEϊ,{A+6ٳ…]/o]|G҅CaoB uaD#:cO)^x 77Δ%Ŧ(/ U-Z0W}7)oNAU|9魷SZ#֨2.u0g.$l)#q$zLVp PmmT)m[ ¡0~vʫ ?!aLIK@43T^{M3d 2|<^jQ\ް8qWwݛɔ@\dԀ/=>v#4B"r `v3Ps 8S}E.xamm[`İ5*S<0r(V1y!mvXnroͻrQEa/^LĝKo6mF6Ka/LiÛ9(A Krǚ?]}h)i 6a;&Oj<]ĔB.ALKMo~}ƍӖ.gϝ) 2Smҡ@LI hĔbJ$4˔9-mS:) p<8l 1݃@0 bʼ#-!{S&ALIb,Pg_ NdB nwԸ'bJp"ґ`C'|gp%:uZTϕ+I褏q҅0t20!=yrhԁ%JR\e{lCjĔKALP 40e*T`"vé]~pCoG}|vddp@@'6Hbc^+ Ъp+zhJ-`)) ÔrLO_Ԇ{Q5jTRx䔠 gJg +gSRĘ-֭/<­[V!)h^֬̎ ;țt;|.Z^͚Pğ~JDU@FVV|έ*CIddDoP +]_&dZ3佻sIMO{Gl~>@nnO|9wo?<܀Ǎ *< V% ǔ`GhРɋ LQP@۸qV^5 9dճLu;d߾իɓ#Ma[hc79;;%05Hθ }@O`˄ةȗ)OƑ~ـD'`WuGqU0H8u-\8N:b *6t"ia=|, zc Sd)ICҖ/_tWCPgVț۱cdXcDҹ͛ӫy ~hpm, -ɓ~>'۷϶Ed)8YS2iq8X: PsW#\fr{ I.0{=ch}6y[_>ʼnP v-Ӷb)LF5zt/Qì10 zLD~ܿgdʌzLi$VP|arSV+gJa[11C *o-]>'m`)g9s~]rBpp[O4ڵ$ JQ0 P2>BXo+P)-[btVL2%/dJaN]3g'2ɱ̟~JDpaLkܮ]}}p0f0g8#wK71c{f̡ i?aL )~dqpaW.(v,`Wa4QŊ̽{?B-~13>9[իgW\XX3p48S :{6{\2G [G[hQ]E-)i |?B3:5Xr:qǍ*` xrp17mO͚MIY *¥YZ !F[>׆ae[0 >}0 Ղ@*!S (WFvO? 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reader.writer.lock; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.ThreadLocalRandom; import java.util.concurrent.TimeUnit; import java.util.stream.IntStream; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * In a multiple thread applications, the threads may try to synchronize the shared resources * regardless of read or write operation. It leads to a low performance especially in a "read more * write less" system as indeed the read operations are thread-safe to another read operation. *

* Reader writer lock is a synchronization primitive that try to resolve this problem. This pattern * allows concurrent access for read-only operations, while write operations require exclusive * access. This means that multiple threads can read the data in parallel but an exclusive lock is * needed for writing or modifying data. When a writer is writing the data, all other writers or * readers will be blocked until the writer is finished writing. * *

* This example use two mutex to demonstrate the concurrent access of multiple readers and writers. * * * @author hongshuwei@gmail.com */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args command line args */ public static void main(String[] args) { ExecutorService executeService = Executors.newFixedThreadPool(10); ReaderWriterLock lock = new ReaderWriterLock(); // Start writers IntStream.range(0, 5) .forEach(i -> executeService.submit(new Writer("Writer " + i, lock.writeLock(), ThreadLocalRandom.current().nextLong(5000)))); LOGGER.info("Writers added..."); // Start readers IntStream.range(0, 5) .forEach(i -> executeService.submit(new Reader("Reader " + i, lock.readLock(), ThreadLocalRandom.current().nextLong(10)))); LOGGER.info("Readers added..."); try { Thread.sleep(5000L); } catch (InterruptedException e) { LOGGER.error("Error sleeping before adding more readers", e); Thread.currentThread().interrupt(); } // Start readers IntStream.range(6, 10) .forEach(i -> executeService.submit(new Reader("Reader " + i, lock.readLock(), ThreadLocalRandom.current().nextLong(10)))); LOGGER.info("More readers added..."); // In the system console, it can see that the read operations are executed concurrently while // write operations are exclusive. executeService.shutdown(); try { executeService.awaitTermination(5, TimeUnit.SECONDS); } catch (InterruptedException e) { LOGGER.error("Error waiting for ExecutorService shutdown", e); Thread.currentThread().interrupt(); } } } Reader.java000066400000000000000000000052141322244523500340730ustar00rootroot00000000000000java-design-patterns-1.18.0/reader-writer-lock/src/main/java/com/iluwatar/reader/writer/lock/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reader.writer.lock; import java.util.concurrent.locks.Lock; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Reader class, read when it acquired the read lock */ public class Reader implements Runnable { private static final Logger LOGGER = LoggerFactory.getLogger(Reader.class); private Lock readLock; private String name; private long readingTime; /** * Create new Reader * * @param name - Name of the thread owning the reader * @param readLock - Lock for this reader * @param readingTime - amount of time (in milliseconds) for this reader to engage reading */ public Reader(String name, Lock readLock, long readingTime) { this.name = name; this.readLock = readLock; this.readingTime = readingTime; } /** * Create new Reader who reads for 250ms * * @param name - Name of the thread owning the reader * @param readLock - Lock for this reader */ public Reader(String name, Lock readLock) { this(name, readLock, 250L); } @Override public void run() { readLock.lock(); try { read(); } catch (InterruptedException e) { LOGGER.info("InterruptedException when reading", e); Thread.currentThread().interrupt(); } finally { readLock.unlock(); } } /** * Simulate the read operation * */ public void read() throws InterruptedException { LOGGER.info("{} begin", name); Thread.sleep(readingTime); LOGGER.info("{} finish after reading {}ms", name, readingTime); } } ReaderWriterLock.java000066400000000000000000000150421322244523500361010ustar00rootroot00000000000000java-design-patterns-1.18.0/reader-writer-lock/src/main/java/com/iluwatar/reader/writer/lock/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reader.writer.lock; import java.util.HashSet; import java.util.Set; import java.util.concurrent.TimeUnit; import java.util.concurrent.locks.Condition; import java.util.concurrent.locks.Lock; import java.util.concurrent.locks.ReadWriteLock; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Class responsible for control the access for reader or writer * * Allows multiple readers to hold the lock at same time, but if any writer holds the lock then readers wait. If reader * holds the lock then writer waits. This lock is not fair. */ public class ReaderWriterLock implements ReadWriteLock { private static final Logger LOGGER = LoggerFactory.getLogger(ReaderWriterLock.class); private Object readerMutex = new Object(); private int currentReaderCount; /** * Global mutex is used to indicate that whether reader or writer gets the lock in the moment. *

* 1. When it contains the reference of {@link readerLock}, it means that the lock is acquired by the reader, another * reader can also do the read operation concurrently.
* 2. When it contains the reference of reference of {@link writerLock}, it means that the lock is acquired by the * writer exclusively, no more reader or writer can get the lock. *

* This is the most important field in this class to control the access for reader/writer. */ private Set globalMutex = new HashSet<>(); private ReadLock readerLock = new ReadLock(); private WriteLock writerLock = new WriteLock(); @Override public Lock readLock() { return readerLock; } @Override public Lock writeLock() { return writerLock; } /** * return true when globalMutex hold the reference of writerLock */ private boolean doesWriterOwnThisLock() { return globalMutex.contains(writerLock); } /** * Nobody get the lock when globalMutex contains nothing * */ private boolean isLockFree() { return globalMutex.isEmpty(); } /** * Reader Lock, can be access for more than one reader concurrently if no writer get the lock */ private class ReadLock implements Lock { @Override public void lock() { synchronized (readerMutex) { currentReaderCount++; if (currentReaderCount == 1) { acquireForReaders(); } } } /** * Acquire the globalMutex lock on behalf of current and future concurrent readers. Make sure no writers currently * owns the lock. */ private void acquireForReaders() { // Try to get the globalMutex lock for the first reader synchronized (globalMutex) { // If the no one get the lock or the lock is locked by reader, just set the reference // to the globalMutex to indicate that the lock is locked by Reader. while (doesWriterOwnThisLock()) { try { globalMutex.wait(); } catch (InterruptedException e) { LOGGER.info("InterruptedException while waiting for globalMutex in acquireForReaders", e); Thread.currentThread().interrupt(); } } globalMutex.add(this); } } @Override public void unlock() { synchronized (readerMutex) { currentReaderCount--; // Release the lock only when it is the last reader, it is ensure that the lock is released // when all reader is completely. if (currentReaderCount == 0) { synchronized (globalMutex) { // Notify the waiter, mostly the writer globalMutex.remove(this); globalMutex.notifyAll(); } } } } @Override public void lockInterruptibly() throws InterruptedException { throw new UnsupportedOperationException(); } @Override public boolean tryLock() { throw new UnsupportedOperationException(); } @Override public boolean tryLock(long time, TimeUnit unit) throws InterruptedException { throw new UnsupportedOperationException(); } @Override public Condition newCondition() { throw new UnsupportedOperationException(); } } /** * Writer Lock, can only be accessed by one writer concurrently */ private class WriteLock implements Lock { @Override public void lock() { synchronized (globalMutex) { // Wait until the lock is free. while (!isLockFree()) { try { globalMutex.wait(); } catch (InterruptedException e) { LOGGER.info("InterruptedException while waiting for globalMutex to begin writing", e); Thread.currentThread().interrupt(); } } // When the lock is free, acquire it by placing an entry in globalMutex globalMutex.add(this); } } @Override public void unlock() { synchronized (globalMutex) { globalMutex.remove(this); // Notify the waiter, other writer or reader globalMutex.notifyAll(); } } @Override public void lockInterruptibly() throws InterruptedException { throw new UnsupportedOperationException(); } @Override public boolean tryLock() { throw new UnsupportedOperationException(); } @Override public boolean tryLock(long time, TimeUnit unit) throws InterruptedException { throw new UnsupportedOperationException(); } @Override public Condition newCondition() { throw new UnsupportedOperationException(); } } } Writer.java000066400000000000000000000052331322244523500341460ustar00rootroot00000000000000java-design-patterns-1.18.0/reader-writer-lock/src/main/java/com/iluwatar/reader/writer/lock/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reader.writer.lock; import java.util.concurrent.locks.Lock; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Writer class, write when it acquired the write lock */ public class Writer implements Runnable { private static final Logger LOGGER = LoggerFactory.getLogger(Writer.class); private Lock writeLock; private String name; private long writingTime; /** * Create new Writer who writes for 250ms * * @param name - Name of the thread owning the writer * @param writeLock - Lock for this writer */ public Writer(String name, Lock writeLock) { this(name, writeLock, 250L); } /** * Create new Writer * * @param name - Name of the thread owning the writer * @param writeLock - Lock for this writer * @param writingTime - amount of time (in milliseconds) for this reader to engage writing */ public Writer(String name, Lock writeLock, long writingTime) { this.name = name; this.writeLock = writeLock; this.writingTime = writingTime; } @Override public void run() { writeLock.lock(); try { write(); } catch (InterruptedException e) { LOGGER.info("InterruptedException when writing", e); Thread.currentThread().interrupt(); } finally { writeLock.unlock(); } } /** * Simulate the write operation */ public void write() throws InterruptedException { LOGGER.info("{} begin", name); Thread.sleep(writingTime); LOGGER.info("{} finished after writing {}ms", name, writingTime); } } java-design-patterns-1.18.0/reader-writer-lock/src/test/000077500000000000000000000000001322244523500231015ustar00rootroot00000000000000java-design-patterns-1.18.0/reader-writer-lock/src/test/java/000077500000000000000000000000001322244523500240225ustar00rootroot00000000000000java-design-patterns-1.18.0/reader-writer-lock/src/test/java/com/000077500000000000000000000000001322244523500246005ustar00rootroot00000000000000java-design-patterns-1.18.0/reader-writer-lock/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500264305ustar00rootroot00000000000000java-design-patterns-1.18.0/reader-writer-lock/src/test/java/com/iluwatar/reader/000077500000000000000000000000001322244523500276725ustar00rootroot00000000000000java-design-patterns-1.18.0/reader-writer-lock/src/test/java/com/iluwatar/reader/writer/000077500000000000000000000000001322244523500312065ustar00rootroot00000000000000java-design-patterns-1.18.0/reader-writer-lock/src/test/java/com/iluwatar/reader/writer/lock/000077500000000000000000000000001322244523500321365ustar00rootroot00000000000000AppTest.java000066400000000000000000000025361322244523500343100ustar00rootroot00000000000000java-design-patterns-1.18.0/reader-writer-lock/src/test/java/com/iluwatar/reader/writer/lock/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reader.writer.lock; import org.junit.jupiter.api.Test; /** * Application test */ public class AppTest { @Test public void test() throws Exception { String[] args = {}; App.main(args); } } ReaderAndWriterTest.java000066400000000000000000000075161322244523500366150ustar00rootroot00000000000000java-design-patterns-1.18.0/reader-writer-lock/src/test/java/com/iluwatar/reader/writer/lock/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reader.writer.lock; import com.iluwatar.reader.writer.lock.utils.InMemoryAppender; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; import static org.junit.jupiter.api.Assertions.assertTrue; /** * @author hongshuwei@gmail.com */ public class ReaderAndWriterTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(); } @AfterEach public void tearDown() { appender.stop(); } private static final Logger LOGGER = LoggerFactory.getLogger(ReaderAndWriterTest.class); /** * Verify reader and writer can only get the lock to read and write orderly */ @Test public void testReadAndWrite() throws Exception { ReaderWriterLock lock = new ReaderWriterLock(); Reader reader1 = new Reader("Reader 1", lock.readLock()); Writer writer1 = new Writer("Writer 1", lock.writeLock()); ExecutorService executeService = Executors.newFixedThreadPool(2); executeService.submit(reader1); // Let reader1 execute first Thread.sleep(150); executeService.submit(writer1); executeService.shutdown(); try { executeService.awaitTermination(10, TimeUnit.SECONDS); } catch (InterruptedException e) { LOGGER.error("Error waiting for ExecutorService shutdown", e); } assertTrue(appender.logContains("Reader 1 begin")); assertTrue(appender.logContains("Reader 1 finish")); assertTrue(appender.logContains("Writer 1 begin")); assertTrue(appender.logContains("Writer 1 finish")); } /** * Verify reader and writer can only get the lock to read and write orderly */ @Test public void testWriteAndRead() throws Exception { ExecutorService executeService = Executors.newFixedThreadPool(2); ReaderWriterLock lock = new ReaderWriterLock(); Reader reader1 = new Reader("Reader 1", lock.readLock()); Writer writer1 = new Writer("Writer 1", lock.writeLock()); executeService.submit(writer1); // Let writer1 execute first Thread.sleep(150); executeService.submit(reader1); executeService.shutdown(); try { executeService.awaitTermination(10, TimeUnit.SECONDS); } catch (InterruptedException e) { LOGGER.error("Error waiting for ExecutorService shutdown", e); } assertTrue(appender.logContains("Writer 1 begin")); assertTrue(appender.logContains("Writer 1 finish")); assertTrue(appender.logContains("Reader 1 begin")); assertTrue(appender.logContains("Reader 1 finish")); } } ReaderTest.java000066400000000000000000000060021322244523500347620ustar00rootroot00000000000000java-design-patterns-1.18.0/reader-writer-lock/src/test/java/com/iluwatar/reader/writer/lock/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reader.writer.lock; import com.iluwatar.reader.writer.lock.utils.InMemoryAppender; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; import static org.junit.jupiter.api.Assertions.assertTrue; import static org.mockito.Mockito.spy; /** * @author hongshuwei@gmail.com */ public class ReaderTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(Reader.class); } @AfterEach public void tearDown() { appender.stop(); } private static final Logger LOGGER = LoggerFactory.getLogger(ReaderTest.class); /** * Verify that multiple readers can get the read lock concurrently */ @Test public void testRead() throws Exception { ExecutorService executeService = Executors.newFixedThreadPool(2); ReaderWriterLock lock = new ReaderWriterLock(); Reader reader1 = spy(new Reader("Reader 1", lock.readLock())); Reader reader2 = spy(new Reader("Reader 2", lock.readLock())); executeService.submit(reader1); Thread.sleep(150); executeService.submit(reader2); executeService.shutdown(); try { executeService.awaitTermination(10, TimeUnit.SECONDS); } catch (InterruptedException e) { LOGGER.error("Error waiting for ExecutorService shutdown", e); } // Read operation will hold the read lock 250 milliseconds, so here we prove that multiple reads // can be performed in the same time. assertTrue(appender.logContains("Reader 1 begin")); assertTrue(appender.logContains("Reader 2 begin")); assertTrue(appender.logContains("Reader 1 finish")); assertTrue(appender.logContains("Reader 2 finish")); } } WriterTest.java000066400000000000000000000061421322244523500350410ustar00rootroot00000000000000java-design-patterns-1.18.0/reader-writer-lock/src/test/java/com/iluwatar/reader/writer/lock/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reader.writer.lock; import com.iluwatar.reader.writer.lock.utils.InMemoryAppender; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; import static org.junit.jupiter.api.Assertions.assertTrue; import static org.mockito.Mockito.spy; /** * @author hongshuwei@gmail.com */ public class WriterTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(Writer.class); } @AfterEach public void tearDown() { appender.stop(); } private static final Logger LOGGER = LoggerFactory.getLogger(WriterTest.class); /** * Verify that multiple writers will get the lock in order. */ @Test public void testWrite() throws Exception { ExecutorService executeService = Executors.newFixedThreadPool(2); ReaderWriterLock lock = new ReaderWriterLock(); Writer writer1 = spy(new Writer("Writer 1", lock.writeLock())); Writer writer2 = spy(new Writer("Writer 2", lock.writeLock())); executeService.submit(writer1); // Let write1 execute first Thread.sleep(150); executeService.submit(writer2); executeService.shutdown(); try { executeService.awaitTermination(10, TimeUnit.SECONDS); } catch (InterruptedException e) { LOGGER.error("Error waiting for ExecutorService shutdown", e); } // Write operation will hold the write lock 250 milliseconds, so here we verify that when two // writer execute concurrently, the second writer can only writes only when the first one is // finished. assertTrue(appender.logContains("Writer 1 begin")); assertTrue(appender.logContains("Writer 1 finish")); assertTrue(appender.logContains("Writer 2 begin")); assertTrue(appender.logContains("Writer 2 finish")); } } java-design-patterns-1.18.0/reader-writer-lock/src/test/java/com/iluwatar/reader/writer/lock/utils/000077500000000000000000000000001322244523500332765ustar00rootroot00000000000000InMemoryAppender.java000066400000000000000000000040001322244523500372720ustar00rootroot00000000000000java-design-patterns-1.18.0/reader-writer-lock/src/test/java/com/iluwatar/reader/writer/lock/utils/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.reader.writer.lock.utils; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import org.slf4j.LoggerFactory; import java.util.LinkedList; import java.util.List; /** * InMemory Log Appender Util. */ public class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender(Class clazz) { ((Logger) LoggerFactory.getLogger(clazz)).addAppender(this); start(); } public InMemoryAppender() { ((Logger) LoggerFactory.getLogger("root")).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public boolean logContains(String message) { return log.stream().anyMatch(event -> event.getFormattedMessage().contains(message)); } } java-design-patterns-1.18.0/repository/000077500000000000000000000000001322244523500200505ustar00rootroot00000000000000java-design-patterns-1.18.0/repository/README.md000066400000000000000000000021551322244523500213320ustar00rootroot00000000000000--- layout: pattern title: Repository folder: repository permalink: /patterns/repository/ categories: Persistence Tier tags: - Java - Difficulty-Intermediate - Spring --- ## Intent Repository layer is added between the domain and data mapping layers to isolate domain objects from details of the database access code and to minimize scattering and duplication of query code. The Repository pattern is especially useful in systems where number of domain classes is large or heavy querying is utilized. ![alt text](./etc/repository.png "Repository") ## Applicability Use the Repository pattern when * the number of domain objects is large * you want to avoid duplication of query code * you want to keep the database querying code in single place * you have multiple data sources ## Real world examples * [Spring Data](http://projects.spring.io/spring-data/) ## Credits * [Don’t use DAO, use Repository](http://thinkinginobjects.com/2012/08/26/dont-use-dao-use-repository/) * [Advanced Spring Data JPA - Specifications and Querydsl](https://spring.io/blog/2011/04/26/advanced-spring-data-jpa-specifications-and-querydsl/) java-design-patterns-1.18.0/repository/etc/000077500000000000000000000000001322244523500206235ustar00rootroot00000000000000java-design-patterns-1.18.0/repository/etc/repository.png000066400000000000000000001537261322244523500235660ustar00rootroot00000000000000PNG  IHDR~#2םIDATx xLWސĒ I*ĒUA,VKe%XD*!hmvZA-i;Lf~3Ϲ93ssN)!B!ĸ(B!BZ>!B!,tRU݋B!) 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.repository; import java.util.List; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.context.support.ClassPathXmlApplicationContext; /** * Repository pattern mediates between the domain and data mapping layers using a collection-like * interface for accessing domain objects. A system with complex domain model often benefits from a * layer that isolates domain objects from the details of the database access code and in such * systems it can be worthwhile to build another layer of abstraction over the mapping layer where * query construction code is concentrated. This becomes more important when there are a large * number of domain classes or heavy querying. In these cases particularly, adding this layer helps * minimize duplicate query logic. *

* In this example we utilize Spring Data to automatically generate a repository for us from the * {@link Person} domain object. Using the {@link PersonRepository} we perform CRUD operations on * the entity, moreover, the query by {@link org.springframework.data.jpa.domain.Specification} are * also performed. Underneath we have configured in-memory H2 database for which schema is created * and dropped on each run. */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args * command line args */ public static void main(String[] args) { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext( "applicationContext.xml"); PersonRepository repository = context.getBean(PersonRepository.class); Person peter = new Person("Peter", "Sagan", 17); Person nasta = new Person("Nasta", "Kuzminova", 25); Person john = new Person("John", "lawrence", 35); Person terry = new Person("Terry", "Law", 36); // Add new Person records repository.save(peter); repository.save(nasta); repository.save(john); repository.save(terry); // Count Person records LOGGER.info("Count Person records: {}", repository.count()); // Print all records List persons = (List) repository.findAll(); for (Person person : persons) { LOGGER.info(person.toString()); } // Update Person nasta.setName("Barbora"); nasta.setSurname("Spotakova"); repository.save(nasta); LOGGER.info("Find by id 2: {}", repository.findOne(2L)); // Remove record from Person repository.delete(2L); // count records LOGGER.info("Count Person records: {}", repository.count()); // find by name Person p = repository.findOne(new PersonSpecifications.NameEqualSpec("John")); LOGGER.info("Find by John is {}", p); // find by age persons = repository.findAll(new PersonSpecifications.AgeBetweenSpec(20, 40)); LOGGER.info("Find Person with age between 20,40: "); for (Person person : persons) { LOGGER.info(person.toString()); } repository.deleteAll(); context.close(); } } java-design-patterns-1.18.0/repository/src/main/java/com/iluwatar/repository/AppConfig.java000066400000000000000000000123261322244523500320460ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.repository; import java.sql.SQLException; import java.util.List; import java.util.Properties; import javax.sql.DataSource; import org.apache.commons.dbcp.BasicDataSource; import org.hibernate.jpa.HibernatePersistenceProvider; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.context.annotation.AnnotationConfigApplicationContext; import org.springframework.context.annotation.Bean; import org.springframework.data.jpa.repository.config.EnableJpaRepositories; import org.springframework.orm.jpa.JpaTransactionManager; import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean; /** * This is the same example as in {@link App} but with annotations based * configuration for Spring. * */ @EnableJpaRepositories public class AppConfig { private static final Logger LOGGER = LoggerFactory.getLogger(AppConfig.class); /** * Creation of H2 db * * @return A new Instance of DataSource */ @Bean(destroyMethod = "close") public DataSource dataSource() { BasicDataSource basicDataSource = new BasicDataSource(); basicDataSource.setDriverClassName("org.h2.Driver"); basicDataSource.setUrl("jdbc:h2:~/databases/person"); basicDataSource.setUsername("sa"); basicDataSource.setPassword("sa"); return (DataSource) basicDataSource; } /** * Factory to create a especific instance of Entity Manager */ @Bean public LocalContainerEntityManagerFactoryBean entityManagerFactory() { LocalContainerEntityManagerFactoryBean entityManager = new LocalContainerEntityManagerFactoryBean(); entityManager.setDataSource(dataSource()); entityManager.setPackagesToScan("com.iluwatar"); entityManager.setPersistenceProvider(new HibernatePersistenceProvider()); entityManager.setJpaProperties(jpaProperties()); return entityManager; } /** * Properties for Jpa */ private static Properties jpaProperties() { Properties properties = new Properties(); properties.setProperty("hibernate.dialect", "org.hibernate.dialect.H2Dialect"); properties.setProperty("hibernate.hbm2ddl.auto", "create-drop"); return properties; } /** * Get transaction manager */ @Bean public JpaTransactionManager transactionManager() throws SQLException { JpaTransactionManager transactionManager = new JpaTransactionManager(); transactionManager.setEntityManagerFactory(entityManagerFactory().getObject()); return transactionManager; } /** * Program entry point * * @param args * command line args */ public static void main(String[] args) { AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext( AppConfig.class); PersonRepository repository = context.getBean(PersonRepository.class); Person peter = new Person("Peter", "Sagan", 17); Person nasta = new Person("Nasta", "Kuzminova", 25); Person john = new Person("John", "lawrence", 35); Person terry = new Person("Terry", "Law", 36); // Add new Person records repository.save(peter); repository.save(nasta); repository.save(john); repository.save(terry); // Count Person records LOGGER.info("Count Person records: {}", repository.count()); // Print all records List persons = (List) repository.findAll(); for (Person person : persons) { LOGGER.info(person.toString()); } // Update Person nasta.setName("Barbora"); nasta.setSurname("Spotakova"); repository.save(nasta); LOGGER.info("Find by id 2: {}", repository.findOne(2L)); // Remove record from Person repository.delete(2L); // count records LOGGER.info("Count Person records: {}", repository.count()); // find by name Person p = repository.findOne(new PersonSpecifications.NameEqualSpec("John")); LOGGER.info("Find by John is {}", p); // find by age persons = repository.findAll(new PersonSpecifications.AgeBetweenSpec(20, 40)); LOGGER.info("Find Person with age between 20,40: "); for (Person person : persons) { LOGGER.info(person.toString()); } context.close(); } } java-design-patterns-1.18.0/repository/src/main/java/com/iluwatar/repository/Person.java000066400000000000000000000064611322244523500314510ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.repository; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; /** * * Person entity * */ @Entity public class Person { @Id @GeneratedValue private Long id; private String name; private String surname; private int age; public Person() { } /** * Constructor */ public Person(String name, String surname, int age) { this.name = name; this.surname = surname; this.age = age; } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getSurname() { return surname; } public void setSurname(String surname) { this.surname = surname; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } @Override public String toString() { return "Person [id=" + id + ", name=" + name + ", surname=" + surname + ", age=" + age + "]"; } @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + age; result = prime * result + (id == null ? 0 : id.hashCode()); result = prime * result + (name == null ? 0 : name.hashCode()); result = prime * result + (surname == null ? 0 : surname.hashCode()); return result; } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (obj == null) { return false; } if (getClass() != obj.getClass()) { return false; } Person other = (Person) obj; if (age != other.age) { return false; } if (id == null) { if (other.id != null) { return false; } } else if (!id.equals(other.id)) { return false; } if (name == null) { if (other.name != null) { return false; } } else if (!name.equals(other.name)) { return false; } if (surname == null) { if (other.surname != null) { return false; } } else if (!surname.equals(other.surname)) { return false; } return true; } } java-design-patterns-1.18.0/repository/src/main/java/com/iluwatar/repository/PersonRepository.java000066400000000000000000000030261322244523500335430ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.repository; import org.springframework.data.jpa.repository.JpaSpecificationExecutor; import org.springframework.data.repository.CrudRepository; import org.springframework.stereotype.Repository; /** * * Person repository * */ @Repository public interface PersonRepository extends CrudRepository, JpaSpecificationExecutor { Person findByName(String name); } PersonSpecifications.java000066400000000000000000000046101322244523500342500ustar00rootroot00000000000000java-design-patterns-1.18.0/repository/src/main/java/com/iluwatar/repository/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.repository; import javax.persistence.criteria.CriteriaBuilder; import javax.persistence.criteria.CriteriaQuery; import javax.persistence.criteria.Predicate; import javax.persistence.criteria.Root; import org.springframework.data.jpa.domain.Specification; /** * Helper class, includes vary Specification as the abstraction of sql query criteria */ public class PersonSpecifications { /** * Specifications stating the Between (From - To) Age Specification */ public static class AgeBetweenSpec implements Specification { private int from; private int to; public AgeBetweenSpec(int from, int to) { this.from = from; this.to = to; } @Override public Predicate toPredicate(Root root, CriteriaQuery query, CriteriaBuilder cb) { return cb.between(root.get("age"), from, to); } } /** * Name specification * */ public static class NameEqualSpec implements Specification { public String name; public NameEqualSpec(String name) { this.name = name; } /** * Get predicate */ public Predicate toPredicate(Root root, CriteriaQuery query, CriteriaBuilder cb) { return cb.equal(root.get("name"), this.name); } } } java-design-patterns-1.18.0/repository/src/main/resources/000077500000000000000000000000001322244523500235755ustar00rootroot00000000000000java-design-patterns-1.18.0/repository/src/main/resources/META-INF/000077500000000000000000000000001322244523500247355ustar00rootroot00000000000000java-design-patterns-1.18.0/repository/src/main/resources/META-INF/persistence.xml000066400000000000000000000027411322244523500300070ustar00rootroot00000000000000 java-design-patterns-1.18.0/repository/src/main/resources/applicationContext.xml000066400000000000000000000060711322244523500301730ustar00rootroot00000000000000 java-design-patterns-1.18.0/repository/src/main/resources/logback.xml000066400000000000000000000037651322244523500257340ustar00rootroot00000000000000 repository.log repository-%d.log 5 %-5p [%d{ISO8601,UTC}] %c: %m%n %-5p [%d{ISO8601,UTC}] %c: %m%n java-design-patterns-1.18.0/repository/src/test/000077500000000000000000000000001322244523500216165ustar00rootroot00000000000000java-design-patterns-1.18.0/repository/src/test/java/000077500000000000000000000000001322244523500225375ustar00rootroot00000000000000java-design-patterns-1.18.0/repository/src/test/java/com/000077500000000000000000000000001322244523500233155ustar00rootroot00000000000000java-design-patterns-1.18.0/repository/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500251455ustar00rootroot00000000000000java-design-patterns-1.18.0/repository/src/test/java/com/iluwatar/repository/000077500000000000000000000000001322244523500273645ustar00rootroot00000000000000AnnotationBasedRepositoryTest.java000066400000000000000000000076771322244523500362020ustar00rootroot00000000000000java-design-patterns-1.18.0/repository/src/test/java/com/iluwatar/repository/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.repository; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNull; import static org.junit.jupiter.api.Assertions.assertTrue; import java.util.Arrays; import java.util.List; import javax.annotation.Resource; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.junit.jupiter.api.extension.ExtendWith; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit.jupiter.SpringExtension; import org.springframework.test.context.support.AnnotationConfigContextLoader; import com.google.common.collect.Lists; /** * Test case to test the functions of {@link PersonRepository}, beside the CRUD functions, the query * by {@link org.springframework.data.jpa.domain.Specification} are also test. * */ @ExtendWith(SpringExtension.class) @ContextConfiguration(classes = { AppConfig.class }, loader = AnnotationConfigContextLoader.class) public class AnnotationBasedRepositoryTest { @Resource private PersonRepository repository; Person peter = new Person("Peter", "Sagan", 17); Person nasta = new Person("Nasta", "Kuzminova", 25); Person john = new Person("John", "lawrence", 35); Person terry = new Person("Terry", "Law", 36); List persons = Arrays.asList(peter, nasta, john, terry); /** * Prepare data for test */ @BeforeEach public void setup() { repository.save(persons); } @Test public void testFindAll() { List actuals = Lists.newArrayList(repository.findAll()); assertTrue(actuals.containsAll(persons) && persons.containsAll(actuals)); } @Test public void testSave() { Person terry = repository.findByName("Terry"); terry.setSurname("Lee"); terry.setAge(47); repository.save(terry); terry = repository.findByName("Terry"); assertEquals(terry.getSurname(), "Lee"); assertEquals(47, terry.getAge()); } @Test public void testDelete() { Person terry = repository.findByName("Terry"); repository.delete(terry); assertEquals(3, repository.count()); assertNull(repository.findByName("Terry")); } @Test public void testCount() { assertEquals(4, repository.count()); } @Test public void testFindAllByAgeBetweenSpec() { List persons = repository.findAll(new PersonSpecifications.AgeBetweenSpec(20, 40)); assertEquals(3, persons.size()); assertTrue(persons.stream().allMatch((item) -> { return item.getAge() > 20 && item.getAge() < 40; })); } @Test public void testFindOneByNameEqualSpec() { Person actual = repository.findOne(new PersonSpecifications.NameEqualSpec("Terry")); assertEquals(terry, actual); } @AfterEach public void cleanup() { repository.deleteAll(); } } java-design-patterns-1.18.0/repository/src/test/java/com/iluwatar/repository/AppConfigTest.java000066400000000000000000000050631322244523500327410ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.repository; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertTrue; import java.sql.ResultSet; import java.sql.SQLException; import javax.sql.DataSource; import org.junit.jupiter.api.Test; import org.junit.jupiter.api.extension.ExtendWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit.jupiter.SpringExtension; import org.springframework.test.context.support.AnnotationConfigContextLoader; import org.springframework.transaction.annotation.Transactional; /** * This case is Just for test the Annotation Based configuration * */ @ExtendWith(SpringExtension.class) @ContextConfiguration(classes = { AppConfig.class }, loader = AnnotationConfigContextLoader.class) public class AppConfigTest { @Autowired DataSource dataSource; /** * Test for bean instance */ @Test public void testDataSource() { assertNotNull(dataSource); } /** * Test for correct query execution */ @Test @Transactional public void testQuery() throws SQLException { ResultSet resultSet = dataSource.getConnection().createStatement().executeQuery("SELECT 1"); String result = null; String expected = "1"; while (resultSet.next()) { result = resultSet.getString(1); } assertTrue(result.equals(expected)); } } java-design-patterns-1.18.0/repository/src/test/java/com/iluwatar/repository/AppTest.java000066400000000000000000000026251322244523500316140ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.repository; import org.junit.jupiter.api.Test; import java.io.IOException; /** * Tests that Repository example runs without errors. */ public class AppTest { @Test public void test() throws IOException { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/repository/src/test/java/com/iluwatar/repository/RepositoryTest.java000066400000000000000000000075041322244523500332540ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.repository; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNull; import static org.junit.jupiter.api.Assertions.assertTrue; import java.util.Arrays; import java.util.List; import javax.annotation.Resource; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.junit.jupiter.api.extension.ExtendWith; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit.jupiter.SpringExtension; import com.google.common.collect.Lists; /** * Test case to test the functions of {@link PersonRepository}, beside the CRUD functions, the query * by {@link org.springframework.data.jpa.domain.Specification} are also test. */ @ExtendWith(SpringExtension.class) @ContextConfiguration(locations = { "classpath:applicationContext.xml" }) public class RepositoryTest { @Resource private PersonRepository repository; Person peter = new Person("Peter", "Sagan", 17); Person nasta = new Person("Nasta", "Kuzminova", 25); Person john = new Person("John", "lawrence", 35); Person terry = new Person("Terry", "Law", 36); List persons = Arrays.asList(peter, nasta, john, terry); /** * Prepare data for test */ @BeforeEach public void setup() { repository.save(persons); } @Test public void testFindAll() { List actuals = Lists.newArrayList(repository.findAll()); assertTrue(actuals.containsAll(persons) && persons.containsAll(actuals)); } @Test public void testSave() { Person terry = repository.findByName("Terry"); terry.setSurname("Lee"); terry.setAge(47); repository.save(terry); terry = repository.findByName("Terry"); assertEquals(terry.getSurname(), "Lee"); assertEquals(47, terry.getAge()); } @Test public void testDelete() { Person terry = repository.findByName("Terry"); repository.delete(terry); assertEquals(3, repository.count()); assertNull(repository.findByName("Terry")); } @Test public void testCount() { assertEquals(4, repository.count()); } @Test public void testFindAllByAgeBetweenSpec() { List persons = repository.findAll(new PersonSpecifications.AgeBetweenSpec(20, 40)); assertEquals(3, persons.size()); assertTrue(persons.stream().allMatch((item) -> { return item.getAge() > 20 && item.getAge() < 40; })); } @Test public void testFindOneByNameEqualSpec() { Person actual = repository.findOne(new PersonSpecifications.NameEqualSpec("Terry")); assertEquals(terry, actual); } @AfterEach public void cleanup() { repository.deleteAll(); } } java-design-patterns-1.18.0/resource-acquisition-is-initialization/000077500000000000000000000000001322244523500254445ustar00rootroot00000000000000java-design-patterns-1.18.0/resource-acquisition-is-initialization/README.md000066400000000000000000000011341322244523500267220ustar00rootroot00000000000000--- layout: pattern title: Resource Acquisition Is Initialization folder: resource-acquisition-is-initialization permalink: /patterns/resource-acquisition-is-initialization/ categories: Other tags: - Java - Difficulty-Beginner - Idiom --- ## Intent Resource Acquisition Is Initialization pattern can be used to implement exception safe resource management. ![alt text](./etc/resource-acquisition-is-initialization.png "Resource Acquisition Is Initialization") ## Applicability Use the Resource Acquisition Is Initialization pattern when * you have resources that must be closed in every condition java-design-patterns-1.18.0/resource-acquisition-is-initialization/etc/000077500000000000000000000000001322244523500262175ustar00rootroot00000000000000resource-acquisition-is-initialization.png000066400000000000000000000072601322244523500364660ustar00rootroot00000000000000java-design-patterns-1.18.0/resource-acquisition-is-initialization/etcPNG  IHDRpCX"wIDATx]ݏ7 X)7҈@WiSMU%4tS Uq%)%! 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.resource.acquisition.is.initialization; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Resource Acquisition Is Initialization pattern was developed for exception safe resource * management by C++ creator Bjarne Stroustrup. *

* In RAII resource is tied to object lifetime: resource allocation is done during object creation * while resource deallocation is done during object destruction. *

* In Java RAII is achieved with try-with-resources statement and interfaces {@link Closeable} and * {@link AutoCloseable}. The try-with-resources statement ensures that each resource is closed at * the end of the statement. Any object that implements {@link java.lang.AutoCloseable}, which * includes all objects which implement {@link java.io.Closeable}, can be used as a resource. * * In this example, {@link SlidingDoor} implements {@link AutoCloseable} and {@link TreasureChest} * implements {@link Closeable}. Running the example, we can observe that both resources are * automatically closed. *

* http://docs.oracle.com/javase/7/docs/technotes/guides/language/try-with-resources.html * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point */ public static void main(String[] args) throws Exception { try (SlidingDoor slidingDoor = new SlidingDoor()) { LOGGER.info("Walking in."); } try (TreasureChest treasureChest = new TreasureChest()) { LOGGER.info("Looting contents."); } } } SlidingDoor.java000066400000000000000000000031131322244523500453260ustar00rootroot00000000000000java-design-patterns-1.18.0/resource-acquisition-is-initialization/src/main/java/com/iluwatar/resource/acquisition/is/initialization/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.resource.acquisition.is.initialization; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * SlidingDoor resource * */ public class SlidingDoor implements AutoCloseable { private static final Logger LOGGER = LoggerFactory.getLogger(SlidingDoor.class); public SlidingDoor() { LOGGER.info("Sliding door opens."); } @Override public void close() throws Exception { LOGGER.info("Sliding door closes."); } } TreasureChest.java000066400000000000000000000032141322244523500456740ustar00rootroot00000000000000java-design-patterns-1.18.0/resource-acquisition-is-initialization/src/main/java/com/iluwatar/resource/acquisition/is/initialization/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.resource.acquisition.is.initialization; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.Closeable; import java.io.IOException; /** * * TreasureChest resource * */ public class TreasureChest implements Closeable { private static final Logger LOGGER = LoggerFactory.getLogger(TreasureChest.class); public TreasureChest() { LOGGER.info("Treasure chest opens."); } @Override public void close() throws IOException { LOGGER.info("Treasure chest closes."); } } java-design-patterns-1.18.0/resource-acquisition-is-initialization/src/test/000077500000000000000000000000001322244523500272125ustar00rootroot00000000000000java-design-patterns-1.18.0/resource-acquisition-is-initialization/src/test/java/000077500000000000000000000000001322244523500301335ustar00rootroot00000000000000java-design-patterns-1.18.0/resource-acquisition-is-initialization/src/test/java/com/000077500000000000000000000000001322244523500307115ustar00rootroot00000000000000java-design-patterns-1.18.0/resource-acquisition-is-initialization/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500325415ustar00rootroot00000000000000resource/000077500000000000000000000000001322244523500343115ustar00rootroot00000000000000java-design-patterns-1.18.0/resource-acquisition-is-initialization/src/test/java/com/iluwataracquisition/000077500000000000000000000000001322244523500366415ustar00rootroot00000000000000java-design-patterns-1.18.0/resource-acquisition-is-initialization/src/test/java/com/iluwatar/resourceis/000077500000000000000000000000001322244523500372545ustar00rootroot00000000000000java-design-patterns-1.18.0/resource-acquisition-is-initialization/src/test/java/com/iluwatar/resource/acquisitioninitialization/000077500000000000000000000000001322244523500423035ustar00rootroot00000000000000java-design-patterns-1.18.0/resource-acquisition-is-initialization/src/test/java/com/iluwatar/resource/acquisition/isAppTest.java000066400000000000000000000025701322244523500445320ustar00rootroot00000000000000java-design-patterns-1.18.0/resource-acquisition-is-initialization/src/test/java/com/iluwatar/resource/acquisition/is/initialization/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.resource.acquisition.is.initialization; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() throws Exception { String[] args = {}; App.main(args); } } ClosableTest.java000066400000000000000000000054471322244523500455440ustar00rootroot00000000000000java-design-patterns-1.18.0/resource-acquisition-is-initialization/src/test/java/com/iluwatar/resource/acquisition/is/initialization/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.resource.acquisition.is.initialization; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import java.util.LinkedList; import java.util.List; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.slf4j.LoggerFactory; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Date: 12/28/15 - 9:31 PM * * @author Jeroen Meulemeester */ public class ClosableTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(); } @AfterEach public void tearDown() { appender.stop(); } @Test public void testOpenClose() throws Exception { try (final SlidingDoor door = new SlidingDoor(); final TreasureChest chest = new TreasureChest()) { assertTrue(appender.logContains("Sliding door opens.")); assertTrue(appender.logContains("Treasure chest opens.")); } assertTrue(appender.logContains("Treasure chest closes.")); assertTrue(appender.logContains("Sliding door closes.")); } /** * Logging Appender Implementation */ public class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender() { ((Logger) LoggerFactory.getLogger("root")).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public boolean logContains(String message) { return log.stream().anyMatch(event -> event.getMessage().equals(message)); } } } java-design-patterns-1.18.0/retry/000077500000000000000000000000001322244523500167765ustar00rootroot00000000000000java-design-patterns-1.18.0/retry/README.md000066400000000000000000000132611322244523500202600ustar00rootroot00000000000000--- layout: pattern title: Retry folder: retry permalink: /patterns/retry/ categories: Other tags: - Java - Difficulty-Expert - Performance --- ## Retry / resiliency Enables an application to handle transient failures from external resources. ## Intent Transparently retry certain operations that involve communication with external resources, particularly over the network, isolating calling code from the retry implementation details. ![alt text](./etc/retry.png "Retry") ## Explanation The `Retry` pattern consists retrying operations on remote resources over the network a set number of times. It closely depends on both business and technical requirements: how much time will the business allow the end user to wait while the operation finishes? What are the performance characteristics of the remote resource during peak loads as well as our application as more threads are waiting for the remote resource's availability? Among the errors returned by the remote service, which can be safely ignored in order to retry? Is the operation [idempotent](https://en.wikipedia.org/wiki/Idempotence)? Another concern is the impact on the calling code by implementing the retry mechanism. The retry mechanics should ideally be completely transparent to the calling code (service interface remains unaltered). There are two general approaches to this problem: from an enterprise architecture standpoint (**strategic**), and a shared library standpoint (**tactical**). *(As an aside, one interesting property is that, since implementations tend to be configurable at runtime, daily monitoring and operation of this capability is shifted over to operations support instead of the developers themselves.)* From a strategic point of view, this would be solved by having requests be redirected to a separate intermediary system, traditionally an [ESB](https://en.wikipedia.org/wiki/Enterprise_service_bus), but more recently a [Service Mesh](https://medium.com/microservices-in-practice/service-mesh-for-microservices-2953109a3c9a). From a tactical point of view, this would be solved by reusing shared libraries like [Hystrix](https://github.com/Netflix/Hystrix)[1]. This is the type of solution showcased in the simple example that accompanies this *README*. In our hypothetical application, we have a generic interface for all operations on remote interfaces: ```java public interface BusinessOperation { T perform() throws BusinessException; } ``` And we have an implementation of this interface that finds our customers by looking up a database: ```java public final class FindCustomer implements BusinessOperation { @Override public String perform() throws BusinessException { ... } } ``` Our `FindCustomer` implementation can be configured to throw `BusinessException`s before returning the customer's ID, thereby simulating a 'flaky' service that intermittently fails. Some exceptions, like the `CustomerNotFoundException`, are deemed to be recoverable after some hypothetical analysis because the root cause of the error stems from "some database locking issue". However, the `DatabaseNotAvailableException` is considered to be a definite showstopper - the application should not attempt to recover from this error. We can model a 'recoverable' scenario by instantiating `FindCustomer` like this: ```java final BusinessOperation op = new FindCustomer( "12345", new CustomerNotFoundException("not found"), new CustomerNotFoundException("still not found"), new CustomerNotFoundException("don't give up yet!") ); ``` In this configuration, `FindCustomer` will throw `CustomerNotFoundException` three times, after which it will consistently return the customer's ID (`12345`). In our hypothetical scenario, our analysts indicate that this operation typically fails 2-4 times for a given input during peak hours, and that each worker thread in the database subsystem typically needs 50ms to "recover from an error". Applying these policies would yield something like this: ```java final BusinessOperation op = new Retry<>( new FindCustomer( "1235", new CustomerNotFoundException("not found"), new CustomerNotFoundException("still not found"), new CustomerNotFoundException("don't give up yet!") ), 5, 100, e -> CustomerNotFoundException.class.isAssignableFrom(e.getClass()) ); ``` Executing `op` *once* would automatically trigger at most 5 retry attempts, with a 100 millisecond delay between attempts, ignoring any `CustomerNotFoundException` thrown while trying. In this particular scenario, due to the configuration for `FindCustomer`, there will be 1 initial attempt and 3 additional retries before finally returning the desired result `12345`. If our `FindCustomer` operation were instead to throw a fatal `DatabaseNotFoundException`, which we were instructed not to ignore, but more importantly we did *not* instruct our `Retry` to ignore, then the operation would have failed immediately upon receiving the error, not matter how many attempts were left.

[1] Please note that *Hystrix* is a complete implementation of the *Circuit Breaker* pattern, of which the *Retry* pattern can be considered a subset of. ## Applicability Whenever an application needs to communicate with an external resource, particularly in a cloud environment, and if the business requirements allow it. ## Presentations You can view Microsoft's article [here](https://docs.microsoft.com/en-us/azure/architecture/patterns/retry). ## Consequences **Pros:** * Resiliency * Provides hard data on external failures **Cons:** * Complexity * Operations maintenance ## Related Patterns * [Circuit Breaker](https://martinfowler.com/bliki/CircuitBreaker.html) java-design-patterns-1.18.0/retry/etc/000077500000000000000000000000001322244523500175515ustar00rootroot00000000000000java-design-patterns-1.18.0/retry/etc/retry.png000066400000000000000000001454441322244523500214400ustar00rootroot00000000000000PNG  IHDR5- pHYs  tIME  7@WstEXtCommentCreated with GIMPW IDATxwXSw,HG[PP@jk--í_Uj(U+ZZ@̄_RI,߯!s܄|8T*2DDDDDDDDDT0IDDDDDDDDDU DDDDDDDDDT0IDDDDDDDDDU DDDDDDDDDT0IDDDDDDDDDU DDDDDDDDDT0IDDDDDDDDDU DDDDDDDDDT0IDDDDDDDDDU DDDDDDDDDT0IDDDDDDDDDU DDDDDDDDDT0IDDDDDDDDDU DDDDDDDDDT0IDDDDDDDDDU DDDDDDDDDT0IDDDDDDDDDU DDDDDDDDDT0IDDDDDDDDDU DDDDDDDDDT0IDDDDDDDDDU/@j:u*""""""""PRԱ|r,Y """"""" %aRTJJJ֭[(*@*2I*^zx5y :U( T˗qmB__/_DNNB!$""""""""*76@ @ P*Ç+#33yyy +M@$kUB}w͛7҂9ZMԔJT-eT{X[[| Twttٳgq5m loV_emQFǏQvmHRѨQ#q̜9066FFиqcEDDDDDDDDxs91kNVP8&&J͛7ʖ5k TZn$;99AGGgϞE~~>?###!<<8{,ttt$[1b6l hj3)))mf1UW\\Jnbbw^)S w^ٶ=zggb M1buKЉ"i$^aZZZsEG*J 8{,.\^zW^8<'''$ o>,YD.)'HJWi-m\TOMM]Z^St$ki۞1cv@ .AEnn./A'"""""""r'+++kdׯ_..II)RF H$dgg˖#Kʿ[D"}E^^(:uThkk+HYY]p̙-- x:]]] :Ta͛]v۷!YЉ BǿD̟?B~mtK.7׸vOnApss~E} OOb6lvwiQϟ?yyyc888ߒ|JXlnܸ@___iK/]KЉ G@ %>cHRťB:}vk֬f̘!-Zieeԯ_;w~-Z['88vvv2e :ukwŊ011AVFAdooϣ}۷/еkWcʕ%$}A&M ?~/AH$ʕ@ZA(5^zxfaa,^ڵ,DDDDDDDDTn eeefXꫯJLhȑ#-QybR׳gO!** sEZQEd>l'O,zhذ!RRRlRntmmm Ԥ28p ::QaRlذa\.JX̤&W>>>D".i&f͚000Za """"""""#5`>gnAGG999k׮HIILjQ(4`z-"""H瑑ptt[@QDDDDTL,"##$ls=zt DDDDTLQHKKCff&4""""*7 UvR)p<+!NI4W6C3|<36eޑI 77ruv؁ &@KK zzz &5Rv7e&m gACC\䥤ѥHZPԵ2gޒ챢iСC ]]]$"""rŤ&UJf m4tk}p݀BD"+Kl* dggC$1hDDDDTnxOM"t$" n< TД!ƨN=K_f Bϕ%5<@Q`R*;+ƑN@cx$뫎1DDeTE `Bs"Tū3@k4@].c{"!rs k*Ԃ`03'4vk X"R*|OMe@QHM"4b @Mb;qϿ:5"1nGbu&g]PQDB^=g5TU%4hEDDDDIM"4@&ݚ+~xÒ_ p u_.fW7~q!B"ŭ[aeeIxp__@ 9y@ =50ID=1QXvCUN]6ζt5Iŕ?ub޼ zlD"[aau8aTdffQ#=ehVss7hhX~x,MV.ab)RS_E@DD /J@H$ vCkoΑDDDDTa$J~[6=l\)ig?/^mB,0p7ΜSwH oͲ@ΞK;QzEDDƦ ׯ$JC Sce7v:j)hh̤u:c۶ղ[iF066l۩ i=8o#0vlQe!S8A[ׁ8-TH$Ϗ;Y33wÇ)hf:AS6'%in@¢ll_OB*"" t HMLjQ!r x\F򠩯Sh ++ 07o;w~HtbH$ȭΝ vkڵtu """"""R&C@D!$ hZX,,) :O 4DVv!jH}fey88tC1}0L AAѬn~+\^'MUkkZZX;|4|""""jJW0DDTiԶӫI (Ĭw뗯{ J:?B.Mߪ_xF|P|(B : в9.BVwɰb5w|89YUS/A cR* Vx$0C@9l]VهDKWtB|(|(ϙ3s+MHIy1c\!N DDDDD]0`@qI:g/DTy4sAA'͛,(CNv̛!S)lmHv*ݾzp};cK-Io~3ID&Uhhb;Cf)4PhP Q ڭv \u0DT)8҆ݾix"n|;tԁ[k5En=}@[5$ڱD Ӿm@"""""jF*H5/仟y}[s`NO"z&$}n7`2k2+쌔#ב|*r$%sĐ҆1|jљDDDDDDՐT,!e4:%!ƨN:p `VLjQ a6#ADDDDDeBcRͻhnt8;/VLjQu$]&4/c{"!rs k*ԂFp<GsuDDDDDDDDT)Ix5\?H} @b/S_>x>xJ%Qlf$H ?O$"""*OON݂XGn͋]| vc\i_a{í|/n>BVj…Q/^C׮xp*Xf콌 Uĥ²=2u8u8bYBFeΝ1aBHRyX.)Za꯱~}|sQZT6Œè}cF]MD} gBr n_%{lVAi.H-N>N!.@ǎ m:'O^BLnX*ޟ]NW,iԾ19ddHoQDDDD-; ^=O=]m  +:tVVб%~ %FaРrI˒ʩ8QUJy 'z+:g]ͥd'L菝;caa&{ܬYc$'JIM""""""""4t4\2:F/>WѬrK*ҫФPh$Vûve5ǎ}}괫+x;p@J="7Qb'x k qL}~:ޠ4)KBfjm ,|~%5{DbM-PNǑYhiG䒚 DDD!0""2. 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* In our example, we have the {@link BusinessOperation} interface as an abstraction over * all operations that our application performs involving remote systems. The calling code should * remain decoupled from implementations. *

* {@link FindCustomer} is a business operation that looks up a customer's record and returns * its ID. Imagine its job is performed by looking up the customer in our local database and * returning its ID. We can pass {@link CustomerNotFoundException} as one of its * {@link FindCustomer#FindCustomer(java.lang.String, com.iluwatar.retry.BusinessException...) * constructor parameters} in order to simulate not finding the customer. *

* Imagine that, lately, this operation has experienced intermittent failures due to some weird * corruption and/or locking in the data. After retrying a few times the customer is found. The * database is still, however, expected to always be available. While a definitive solution is * found to the problem, our engineers advise us to retry the operation a set number * of times with a set delay between retries, although not too many retries otherwise the end user * will be left waiting for a long time, while delays that are too short will not allow the database * to recover from the load. *

* To keep the calling code as decoupled as possible from this workaround, we have implemented the * retry mechanism as a {@link BusinessOperation} named {@link Retry}. * * @author George Aristy (george.aristy@gmail.com) * @see Retry pattern (Microsoft Azure Docs) */ public final class App { private static final Logger LOG = LoggerFactory.getLogger(App.class); private static BusinessOperation op; /** * Entry point. * * @param args not used * @throws Exception not expected */ public static void main(String[] args) throws Exception { noErrors(); errorNoRetry(); errorWithRetry(); } private static void noErrors() throws Exception { op = new FindCustomer("123"); op.perform(); LOG.info("Sometimes the operation executes with no errors."); } private static void errorNoRetry() throws Exception { op = new FindCustomer("123", new CustomerNotFoundException("not found")); try { op.perform(); } catch (CustomerNotFoundException e) { LOG.info("Yet the operation will throw an error every once in a while."); } } private static void errorWithRetry() throws Exception { final Retry retry = new Retry<>( new FindCustomer("123", new CustomerNotFoundException("not found")), 3, //3 attempts 100, //100 ms delay between attempts e -> CustomerNotFoundException.class.isAssignableFrom(e.getClass()) ); op = retry; final String customerId = op.perform(); LOG.info(String.format( "However, retrying the operation while ignoring a recoverable error will eventually yield " + "the result %s after a number of attempts %s", customerId, retry.attempts() )); } } java-design-patterns-1.18.0/retry/src/main/java/com/iluwatar/retry/BusinessException.java000066400000000000000000000035221322244523500315240ustar00rootroot00000000000000/* * The MIT License (MIT) * * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.retry; /** * The top-most type in our exception hierarchy that signifies that an unexpected error * condition occurred. Its use is reserved as a "catch-all" for cases where no other subtype * captures the specificity of the error condition in question. Calling code is not expected to * be able to handle this error and should be reported to the maintainers immediately. * * @author George Aristy (george.aristy@gmail.com) */ public class BusinessException extends Exception { private static final long serialVersionUID = 6235833142062144336L; /** * Ctor * * @param message the error message */ public BusinessException(String message) { super(message); } } java-design-patterns-1.18.0/retry/src/main/java/com/iluwatar/retry/BusinessOperation.java000066400000000000000000000033441322244523500315300ustar00rootroot00000000000000/* * The MIT License (MIT) * * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.retry; /** * Performs some business operation. * * @author George Aristy (george.aristy@gmail.com) * @param the return type */ @FunctionalInterface public interface BusinessOperation { /** * Performs some business operation, returning a value {@code T} if successful, otherwise throwing * an exception if an error occurs. * * @return the return value * @throws BusinessException if the operation fails. Implementations are allowed to throw more * specific subtypes depending on the error conditions */ T perform() throws BusinessException; } java-design-patterns-1.18.0/retry/src/main/java/com/iluwatar/retry/CustomerNotFoundException.java000066400000000000000000000033701322244523500332100ustar00rootroot00000000000000/* * The MIT License (MIT) * * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.retry; /** * Indicates that the customer was not found. *

* The severity of this error is bounded by its context: was the search for the customer triggered * by an input from some end user, or were the search parameters pulled from your database? * * @author George Aristy (george.aristy@gmail.com) */ public final class CustomerNotFoundException extends BusinessException { private static final long serialVersionUID = -6972888602621778664L; /** * Ctor. * * @param message the error message */ public CustomerNotFoundException(String message) { super(message); } } DatabaseNotAvailableException.java000066400000000000000000000031321322244523500336350ustar00rootroot00000000000000java-design-patterns-1.18.0/retry/src/main/java/com/iluwatar/retry/* * The MIT License (MIT) * * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.retry; /** * Catastrophic error indicating that we have lost connection to our database. * * @author George Aristy (george.aristy@gmail.com) */ public final class DatabaseNotAvailableException extends BusinessException { private static final long serialVersionUID = -3750769625095997799L; /** * Ctor. * * @param message the error message */ public DatabaseNotAvailableException(String message) { super(message); } } java-design-patterns-1.18.0/retry/src/main/java/com/iluwatar/retry/FindCustomer.java000066400000000000000000000044531322244523500304600ustar00rootroot00000000000000/* * The MIT License (MIT) * * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.retry; import java.util.ArrayDeque; import java.util.Arrays; import java.util.Deque; /** * Finds a customer, returning its ID from our records. *

* This is an imaginary operation that, for some imagined input, returns the ID for a customer. * However, this is a "flaky" operation that is supposed to fail intermittently, but for the * purposes of this example it fails in a programmed way depending on the constructor parameters. * * @author George Aristy (george.aristy@gmail.com) */ public final class FindCustomer implements BusinessOperation { private final String customerId; private final Deque errors; /** * Ctor. * * @param customerId the final result of the remote operation * @param errors the errors to throw before returning {@code customerId} */ public FindCustomer(String customerId, BusinessException... errors) { this.customerId = customerId; this.errors = new ArrayDeque<>(Arrays.asList(errors)); } @Override public String perform() throws BusinessException { if (!this.errors.isEmpty()) { throw this.errors.pop(); } return this.customerId; } } java-design-patterns-1.18.0/retry/src/main/java/com/iluwatar/retry/Retry.java000066400000000000000000000066041322244523500271630ustar00rootroot00000000000000/* * The MIT License (MIT) * * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.retry; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.List; import java.util.concurrent.atomic.AtomicInteger; import java.util.function.Predicate; /** * Decorates {@link BusinessOperation business operation} with "retry" capabilities. * * @author George Aristy (george.aristy@gmail.com) * @param the remote op's return type */ public final class Retry implements BusinessOperation { private final BusinessOperation op; private final int maxAttempts; private final long delay; private final AtomicInteger attempts; private final Predicate test; private final List errors; /** * Ctor. * * @param op the {@link BusinessOperation} to retry * @param maxAttempts number of times to retry * @param delay delay (in milliseconds) between attempts * @param ignoreTests tests to check whether the remote exception can be ignored. No exceptions * will be ignored if no tests are given */ @SafeVarargs public Retry( BusinessOperation op, int maxAttempts, long delay, Predicate... ignoreTests ) { this.op = op; this.maxAttempts = maxAttempts; this.delay = delay; this.attempts = new AtomicInteger(); this.test = Arrays.stream(ignoreTests).reduce(Predicate::or).orElse(e -> false); this.errors = new ArrayList<>(); } /** * The errors encountered while retrying, in the encounter order. * * @return the errors encountered while retrying */ public List errors() { return Collections.unmodifiableList(this.errors); } /** * The number of retries performed. * * @return the number of retries performed */ public int attempts() { return this.attempts.intValue(); } @Override public T perform() throws BusinessException { do { try { return this.op.perform(); } catch (BusinessException e) { this.errors.add(e); if (this.attempts.incrementAndGet() >= this.maxAttempts || !this.test.test(e)) { throw e; } try { Thread.sleep(this.delay); } catch (InterruptedException f) { //ignore } } } while (true); } } java-design-patterns-1.18.0/retry/src/test/000077500000000000000000000000001322244523500205445ustar00rootroot00000000000000java-design-patterns-1.18.0/retry/src/test/java/000077500000000000000000000000001322244523500214655ustar00rootroot00000000000000java-design-patterns-1.18.0/retry/src/test/java/com/000077500000000000000000000000001322244523500222435ustar00rootroot00000000000000java-design-patterns-1.18.0/retry/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500240735ustar00rootroot00000000000000java-design-patterns-1.18.0/retry/src/test/java/com/iluwatar/retry/000077500000000000000000000000001322244523500252405ustar00rootroot00000000000000java-design-patterns-1.18.0/retry/src/test/java/com/iluwatar/retry/FindCustomerTest.java000066400000000000000000000051641322244523500313530ustar00rootroot00000000000000/* * The MIT License (MIT) * * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.retry; import org.junit.jupiter.api.Test; import static org.hamcrest.CoreMatchers.is; import static org.hamcrest.MatcherAssert.assertThat; import static org.junit.jupiter.api.Assertions.assertThrows; /** * Unit tests for {@link FindCustomer}. * * @author George Aristy (george.aristy@gmail.com) */ public class FindCustomerTest { /** * Returns the given result with no exceptions. */ @Test public void noExceptions() throws Exception { assertThat( new FindCustomer("123").perform(), is("123") ); } /** * Throws the given exception. * * @throws Exception the expected exception */ @Test public void oneException() throws Exception { assertThrows(BusinessException.class, () -> { new FindCustomer("123", new BusinessException("test")).perform(); }); } /** * Should first throw the given exceptions, then return the given result. * * @throws Exception not an expected exception */ @Test public void resultAfterExceptions() throws Exception { final BusinessOperation op = new FindCustomer( "123", new CustomerNotFoundException("not found"), new DatabaseNotAvailableException("not available") ); try { op.perform(); } catch (CustomerNotFoundException e) { //ignore } try { op.perform(); } catch (DatabaseNotAvailableException e) { //ignore } assertThat( op.perform(), is("123") ); } } java-design-patterns-1.18.0/retry/src/test/java/com/iluwatar/retry/RetryTest.java000066400000000000000000000057731322244523500300640ustar00rootroot00000000000000/* * The MIT License (MIT) * * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.retry; import org.junit.jupiter.api.Test; import static org.hamcrest.CoreMatchers.hasItem; import static org.hamcrest.CoreMatchers.is; import static org.hamcrest.MatcherAssert.assertThat; /** * Unit tests for {@link Retry}. * * @author George Aristy (george.aristy@gmail.com) */ public class RetryTest { /** * Should contain all errors thrown. */ @Test public void errors() throws Exception { final BusinessException e = new BusinessException("unhandled"); final Retry retry = new Retry<>( () -> { throw e; }, 2, 0 ); try { retry.perform(); } catch (BusinessException ex) { //ignore } assertThat( retry.errors(), hasItem(e) ); } /** * No exceptions will be ignored, hence final number of attempts should be 1 even if we're asking * it to attempt twice. */ @Test public void attempts() { final BusinessException e = new BusinessException("unhandled"); final Retry retry = new Retry<>( () -> { throw e; }, 2, 0 ); try { retry.perform(); } catch (BusinessException ex) { //ignore } assertThat( retry.attempts(), is(1) ); } /** * Final number of attempts should be equal to the number of attempts asked because we are * asking it to ignore the exception that will be thrown. */ @Test public void ignore() throws Exception { final BusinessException e = new CustomerNotFoundException("customer not found"); final Retry retry = new Retry<>( () -> { throw e; }, 2, 0, ex -> CustomerNotFoundException.class.isAssignableFrom(ex.getClass()) ); try { retry.perform(); } catch (BusinessException ex) { //ignore } assertThat( retry.attempts(), is(2) ); } }java-design-patterns-1.18.0/semaphore/000077500000000000000000000000001322244523500176145ustar00rootroot00000000000000java-design-patterns-1.18.0/semaphore/README.md000066400000000000000000000015531322244523500210770ustar00rootroot00000000000000--- layout: pattern title: Semaphore folder: semaphore permalink: /patterns/semaphore/ categories: Concurrency tags: - Java - Difficulty-Intermediate --- ## Also known as Counting Semaphore ## Intent Create a lock which mediates access to a pool of resources. Only a limited number of threads, specified at the creation of the semaphore, can access the resources at any given time. 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I iH"3KIENDB`java-design-patterns-1.18.0/semaphore/pom.xml000066400000000000000000000036431322244523500211370ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 semaphore org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/semaphore/src/000077500000000000000000000000001322244523500204035ustar00rootroot00000000000000java-design-patterns-1.18.0/semaphore/src/main/000077500000000000000000000000001322244523500213275ustar00rootroot00000000000000java-design-patterns-1.18.0/semaphore/src/main/java/000077500000000000000000000000001322244523500222505ustar00rootroot00000000000000java-design-patterns-1.18.0/semaphore/src/main/java/com/000077500000000000000000000000001322244523500230265ustar00rootroot00000000000000java-design-patterns-1.18.0/semaphore/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500246565ustar00rootroot00000000000000java-design-patterns-1.18.0/semaphore/src/main/java/com/iluwatar/semaphore/000077500000000000000000000000001322244523500266415ustar00rootroot00000000000000java-design-patterns-1.18.0/semaphore/src/main/java/com/iluwatar/semaphore/App.java000066400000000000000000000040421322244523500302240ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.semaphore; /** * A Semaphore mediates access by a group of threads to a pool of resources. *

* In this example a group of customers are taking fruit from a fruit shop. * There is a bowl each of apples, oranges and lemons. Only one customer can * access a bowl simultaneously. A Semaphore is used to indicate how many * resources are currently available and must be acquired in order for a bowl * to be given to a customer. Customers continually try to take fruit until * there is no fruit left in the shop. */ public class App { /** * main method */ public static void main(String[] args) { FruitShop shop = new FruitShop(); new Customer("Peter", shop).start(); new Customer("Paul", shop).start(); new Customer("Mary", shop).start(); new Customer("John", shop).start(); new Customer("Ringo", shop).start(); new Customer("George", shop).start(); } } java-design-patterns-1.18.0/semaphore/src/main/java/com/iluwatar/semaphore/Customer.java000066400000000000000000000045551322244523500313160ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.semaphore; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * A Customer attempts to repeatedly take Fruit from the FruitShop by * taking Fruit from FruitBowl instances. */ public class Customer extends Thread { private static final Logger LOGGER = LoggerFactory.getLogger(Customer.class); /** * Name of the Customer. */ private final String name; /** * The FruitShop he is using. */ private final FruitShop fruitShop; /** * Their bowl of Fruit. */ private final FruitBowl fruitBowl; /** * Customer constructor */ public Customer(String name, FruitShop fruitShop) { this.name = name; this.fruitShop = fruitShop; this.fruitBowl = new FruitBowl(); } /** * The Customer repeatedly takes Fruit from the FruitShop until no Fruit * remains. */ public void run() { while (fruitShop.countFruit() > 0) { FruitBowl bowl = fruitShop.takeBowl(); Fruit fruit; if (bowl != null && (fruit = bowl.take()) != null) { LOGGER.info("{} took an {}", name, fruit); fruitBowl.put(fruit); fruitShop.returnBowl(bowl); } } LOGGER.info("{} took {}", name, fruitBowl); } } java-design-patterns-1.18.0/semaphore/src/main/java/com/iluwatar/semaphore/Fruit.java000066400000000000000000000033361322244523500306020ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.semaphore; /** * Fruit is a resource stored in a FruitBowl. */ public class Fruit { /** * Enumeration of Fruit Types */ public static enum FruitType { ORANGE, APPLE, LEMON } private FruitType type; public Fruit(FruitType type) { this.type = type; } public FruitType getType() { return type; } /** * toString method */ public String toString() { switch (type) { case ORANGE: return "Orange"; case APPLE: return "Apple"; case LEMON: return "Lemon"; default: return ""; } } } java-design-patterns-1.18.0/semaphore/src/main/java/com/iluwatar/semaphore/FruitBowl.java000066400000000000000000000044571322244523500314330ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.semaphore; import java.util.List; import java.util.ArrayList; /** * A FruitBowl contains Fruit. */ public class FruitBowl { private List fruit = new ArrayList<>(); /** * * @return The amount of Fruit left in the bowl. */ public int countFruit() { return fruit.size(); } /** * Put an item of Fruit into the bowl. * * @param f fruit */ public void put(Fruit f) { fruit.add(f); } /** * Take an item of Fruit out of the bowl. * @return The Fruit taken out of the bowl, or null if empty. */ public Fruit take() { if (fruit.isEmpty()) { return null; } else { return fruit.remove(0); } } /** * toString method */ public String toString() { int apples = 0; int oranges = 0; int lemons = 0; for (Fruit f : fruit) { switch (f.getType()) { case APPLE: apples++; break; case ORANGE: oranges++; break; case LEMON: lemons++; break; default: } } return apples + " Apples, " + oranges + " Oranges, and " + lemons + " Lemons"; } } java-design-patterns-1.18.0/semaphore/src/main/java/com/iluwatar/semaphore/FruitShop.java000066400000000000000000000065131322244523500314340ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.semaphore; /** * A FruitShop contains three FruitBowl instances and controls access to them. */ public class FruitShop { /** * The FruitBowl instances stored in the class. */ private FruitBowl[] bowls = { new FruitBowl(), new FruitBowl(), new FruitBowl() }; /** * Access flags for each of the FruitBowl instances. */ private boolean[] available = { true, true, true }; /** * The Semaphore that controls access to the class resources. */ private Semaphore semaphore; /** * FruitShop constructor */ public FruitShop() { for (int i = 0; i < 100; i++) { bowls[0].put(new Fruit(Fruit.FruitType.APPLE)); bowls[1].put(new Fruit(Fruit.FruitType.ORANGE)); bowls[2].put(new Fruit(Fruit.FruitType.LEMON)); } semaphore = new Semaphore(3); } /** * * @return The amount of Fruit left in the shop. */ public synchronized int countFruit() { return bowls[0].countFruit() + bowls[1].countFruit() + bowls[2].countFruit(); } /** * Method called by Customer to get a FruitBowl from the shop. This method * will try to acquire the Semaphore before returning the first available * FruitBowl. */ public synchronized FruitBowl takeBowl() { FruitBowl bowl = null; try { semaphore.acquire(); if (available[0]) { bowl = bowls[0]; available[0] = false; } else if (available[1]) { bowl = bowls[1]; available[1] = false; } else if (available[2]) { bowl = bowls[2]; available[2] = false; } } catch (InterruptedException e) { e.printStackTrace(); } finally { semaphore.release(); } return bowl; } /** * Method called by a Customer instance to return a FruitBowl to the shop. * This method releases the Semaphore, making the FruitBowl available to * another Customer. */ public synchronized void returnBowl(FruitBowl bowl) { if (bowl == bowls[0]) { available[0] = true; } else if (bowl == bowls[1]) { available[1] = true; } else if (bowl == bowls[2]) { available [2] = true; } } } java-design-patterns-1.18.0/semaphore/src/main/java/com/iluwatar/semaphore/Lock.java000066400000000000000000000025201322244523500303730ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.semaphore; /** * Lock is an interface for a lock which can be acquired and released. */ public interface Lock { void acquire() throws InterruptedException; void release(); } java-design-patterns-1.18.0/semaphore/src/main/java/com/iluwatar/semaphore/Semaphore.java000066400000000000000000000044021322244523500314270ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.semaphore; /** * Semaphore is an implementation of a semaphore lock. */ public class Semaphore implements Lock { private final int licenses; /** * The number of concurrent resource accesses which are allowed. */ private int counter; public Semaphore(int licenses) { this.licenses = licenses; this.counter = licenses; } /** * Returns the number of licenses managed by the Semaphore */ public int getNumLicenses() { return licenses; } /** * Returns the number of available licenses */ public int getAvailableLicenses() { return counter; } /** * Method called by a thread to acquire the lock. If there are no resources * available this will wait until the lock has been released to re-attempt * the acquire. */ public synchronized void acquire() throws InterruptedException { while (counter == 0) { wait(); } counter = counter - 1; } /** * Method called by a thread to release the lock. */ public synchronized void release() { if (counter < licenses) { counter = counter + 1; notify(); } } } java-design-patterns-1.18.0/semaphore/src/test/000077500000000000000000000000001322244523500213625ustar00rootroot00000000000000java-design-patterns-1.18.0/semaphore/src/test/java/000077500000000000000000000000001322244523500223035ustar00rootroot00000000000000java-design-patterns-1.18.0/semaphore/src/test/java/com/000077500000000000000000000000001322244523500230615ustar00rootroot00000000000000java-design-patterns-1.18.0/semaphore/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500247115ustar00rootroot00000000000000java-design-patterns-1.18.0/semaphore/src/test/java/com/iluwatar/semaphore/000077500000000000000000000000001322244523500266745ustar00rootroot00000000000000java-design-patterns-1.18.0/semaphore/src/test/java/com/iluwatar/semaphore/AppTest.java000066400000000000000000000025751322244523500311300ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.semaphore; import org.junit.jupiter.api.Test; import java.io.IOException; /** * Application Test Entrypoint */ public class AppTest { @Test public void test() throws IOException { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/semaphore/src/test/java/com/iluwatar/semaphore/FruitBowlTest.java000066400000000000000000000035711322244523500323220ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.semaphore; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertNull; /** * Test taking from and putting Fruit into a FruitBowl */ public class FruitBowlTest { @Test public void fruitBowlTest() { FruitBowl fbowl = new FruitBowl(); assertEquals(fbowl.countFruit(), 0); for (int i = 1; i <= 10; i++) { fbowl.put(new Fruit(Fruit.FruitType.LEMON)); assertEquals(fbowl.countFruit(), i); } for (int i = 9; i >= 0; i--) { assertNotNull(fbowl.take()); assertEquals(fbowl.countFruit(), i); } assertNull(fbowl.take()); } } java-design-patterns-1.18.0/semaphore/src/test/java/com/iluwatar/semaphore/SemaphoreTest.java000066400000000000000000000036671322244523500323360ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.semaphore; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.fail; /** * Test case for acquiring and releasing a Semaphore */ public class SemaphoreTest { @Test public void acquireReleaseTest() { Semaphore sphore = new Semaphore(3); assertEquals(sphore.getAvailableLicenses(), 3); for (int i = 2; i >= 0; i--) { try { sphore.acquire(); assertEquals(sphore.getAvailableLicenses(), i); } catch (InterruptedException e) { fail(e.toString()); } } for (int i = 1; i <= 3; i++) { sphore.release(); assertEquals(sphore.getAvailableLicenses(), i); } sphore.release(); assertEquals(sphore.getAvailableLicenses(), 3); } } java-design-patterns-1.18.0/servant/000077500000000000000000000000001322244523500173135ustar00rootroot00000000000000java-design-patterns-1.18.0/servant/README.md000066400000000000000000000013601322244523500205720ustar00rootroot00000000000000--- layout: pattern title: Servant folder: servant permalink: /patterns/servant/ categories: Structural tags: - Java - Difficulty-Beginner --- ## Intent Servant is used for providing some behavior to a group of classes. Instead of defining that behavior in each class - or when we cannot factor out this behavior in the common parent class - it is defined once in the Servant. ![alt text](./etc/servant-pattern.png "Servant") ## Applicability Use the Servant pattern when * when we want some objects to perform a common action and don't want to define this action as a method in every class. ## Credits * [Let's Modify the Objects-First Approach into Design-Patterns-First](http://edu.pecinovsky.cz/papers/2006_ITiCSE_Design_Patterns_First.pdf) java-design-patterns-1.18.0/servant/etc/000077500000000000000000000000001322244523500200665ustar00rootroot00000000000000java-design-patterns-1.18.0/servant/etc/servant-pattern.png000066400000000000000000000726271322244523500237470ustar00rootroot00000000000000PNG  IHDRp"u^IDATxo}X!K  `  (4 9XQ)1\;0THR"3TȖQ9iKlq +,lg&L."T=O=]zꚪy@i]`ȑi@`D~]\ 4*Hعi#Ts3|;;G afv vPALxw3ݝijb;|j]kzVWDzafv v^d罹Vksy&ZRZ`ʢݾo#o#);뽝Ε⥷H .Pנ&Τ|W])ȏÅ׮KEvY׌8L|,ԵMض|[x :6Ad:EWF4s3|;;[CXz;_ &imJlnu޹v/Rk* 4'VV6;߉;:3v~@™ 5;/\عid٘rZ6S?TS|Sנ…&9B ;7÷0Ms vn&v\wH\Z9BŨPE[G$B֫Bg;wG*yPA"ęm p/ߙ=qa,֔^*dA83ع;WΣBu[/\_b×K/*Z83շsrm Tr#'].u"bߕ)O& ?xW޸v^qf;'1m`IՇuU|ߎ=ɏ\{^֩o|l;ՋMxY~V9Oٹ >vnI83wNncz- /\}=/.Ag?<uz<[w+m=ϴд#MK!Lv-rkH#Ww7ɏ~_/?zd{dc"9̦cegvFm po^>W~ ߼̝_K/~H7<_g>S ]v{lћ;PqfswD[GJxO|\~9W,5i/G.g;wG*yT/gO>-~˜M! vhUD3#z9ZI`&m f]̵3&nLhUFQsOMoI7w 8>ȘtBX!L-|D\h~=J^Y祭׈GTݱv<zxns33-^:{o,ڥ[Pxx0{\G-j4E3SK;1>ABb0ve韗^#jtUO)3%G}YN wڽɪS8&҉3,+e A5!L-|r~Ci;"yT=I.h5<#O GGsJ>H?H~aEp"ę8ձs25:@Gnl=&ڹhzhΧ(BZ(E;g{穕^zyTA w`{\msAdw1]TOQ83~i=f2;KPOhU^Q~ Mq<;OoS!L]?qĸqe]D[;?BDӼ~]]gvޟ,1vEPZgvd֫Bg;wG*yPA"ęm p!TqfswD[|P&G\eߕ;wG-p!TqfswD[G$BSm `$BRSm `$B2ƴu*H83%9i#TqfJsr;G TwƴQm;{FsNO*BJ;'1mvϣ{}#$\d|Q-D3S' RSr֫<7>{gQH,>p֎|;krߙwy&=s¼eus3רe#Tqf*Ԕƴ*`8}L,ffd F#C1Gvd&M_G~TZΑM0+;Wytwr3 ^6.ۊn}Ԃt'g{Ƭ^1%;OGݦf#B֫zweXR.m`$Bv_!e Wl;˽QtMf5dzT̷K8#tD[#ݴO^zA"ęk/m-'MLXo?g"")UY.vj%ںMWWW|o_ *.B\vwק_c1mx{ܥNo{;y׽]H,Rm&:2Q\ڵ&PE3|J@gT3vAR:FGӤjVs<+i$#Tqf3g6ey>2`ORGᴩGf|;HYM}2~).MfK^q=MU4-̐<~x PG7?b< WƯ1Áwxj#]O#4ZعKDE\ у>qf_u ^JlP¯1{sGAo-m)5-I4,\7w^&T5`^ oooϣsoprmᵭC/fpͻ~V58TpdYT&! vhIOytw/_yJRצ_cWY yJIHCM B?5j">Qm^e?2rVyt'p΋X]~aһ|蚸e;wG*u̱xw±yRڦ_c&ӼHv`;*T83ع;Wy@/=r7.R1^ywoP }QNL-B!Os!ph/C5PzpPmڇ  iGSR ;7B֫@Σ)GuM(B֫Bg;wG*yPA"ę\E֫vPA"ę\M֫vPA"ęΥ_ͨO[9Bg;wG*#Tqf9>qb_Ɏ{̵i%5.;A[/ٹʬ54m'XWr .aͱyfyegfωD8%C*F35 heQi%%I N@%SKkƒvjj9!p;ϕYʁK/+k)IH[3#rI3I}L'k”'XW'Yڒ^E2t}OdV,jR"ęny4Iz\d59m)&Jc Gk ISY4geb}FǛe6*BI yi`;miL2ʕ8Rr5aG/Q&;iU`Q9L} y05'qaGꂫUy$ g%/G86Z.B\ӜZJ7Y;PՏs-țΣL[remeHԻ|w|'Υbtg1ar]RfbM=GE3jӜ>G?ThU`Q2V+jq,/BB)U Iʡ24uT)ȏՒid\;iU`Q2䣻g2iuص28zW^9G16yjd:kX.cSw΍24uTdW)r-Z㌓Gŵ24u`^&:ңJ%47Z.B?j6Cb ! swD[G$B#z*H83cyФWD33_HIs vnvw$jpsskkk%5'*Jع1<`,q`fn*^e]__ْ;G afy2Os_$榐S7N[&Ȍr[=z‚}„eT'dރ'&iPILs#Ȅ&M͟U2f}} D6i)d!Ur &.6[u4ƫ)N׃ہY]]meuWP\(Ժ4`٤D*k2H9Ox*Fie/;q_k-tc'YYpԵrW5&Ia_}|bATI`ήnpA5 %ydY)M%/:mrԾv2<" fBtާ&+7%Z$R|Ng&L/K%_RF７,|2q:^tTp%kN]{yӨz6Y&R_~eܛ/\[xmP7K2@ϖ2s{~Jkb6 Tc&j<_N#7 uO|a,m̸/>oyRv. /v[IᒦfkQs9S&y6|J_|v`"3e=ݾ|򕷯]/JiǬ0+,;Wnޫ]y/X K֓!s]]@5QI~cRThZШ⫁,;ʦ5m~ݑoCywtHuOV_'kZ/y; [[[\ZZ* e? n?+^cy2g5w ٞٽx޽;چ΃%ڹ<5۹ઝ'm&1exhڮˠReͻk7i.껏g1GoI>/ḻxw±y2Ҁg) f,e(s vnol{榓88>+ voaw(.思Cilooai?fJq!Z 8v%s޽^z@CidG$9;cそCU^~ .```P!D7!@u9vUիWvA}wnCF>??rCݦgMڢ`Pin삀?~] IΡ6q‚蠗] IΡ6\p`P'6t;7Ρ~8p0wnC-;taBwnC^.KKKeds7[]]-PcDb;G%*Kt 7Ξ=jPa^)9@t,,,D/]/55;(Çc$6=t<Xk$j vP ܻwY{ei Q5ZTǏmҷX ꠷Z-Pwsj!|_;wNvPQ=z;{{{t͡`իL^4S~APwsn9#-?Ki?` nSJy`wQj KKK߱s7; P'VWW^;_g;g;kwz9s=xB|W1'y`z#]tӋK鼝:K<wdl䚡j1ڹKƣp޹]> Ws硂իv{˴s4=aC41&vw>'/o}>'BbG/t냉%=JLk- Ǐ^yOdٵ|Ϟʧ>e!#_cɿeRnʼ[a.5)KA϶}"y`ooo ^__V$zg?OWp˾+ Qid?=XG 2ٹo_v(`0QA;.#4W弽_IJX#tk_]G=ȧy¼3_zWC&y.ϴΝ 7g\XdsOӽd_Ν Us_عP`;wCعP`;wCعP`;wCعP`;wCعP`;wCعP`,;u<yPr3ֻm֗u d \l6y`0Q\y:~dwsZs硂D)vt0j{5JqMދ.K_x/]etYZ9oj0\G-j:vy8n~tQwECj<^8ꝧ7v(*LTwiӏ*k &ʲs4]aC aC aC aC>؂#łs'Ԣw:T0vхDVf;noN G/ˇ;}-;)B,;? 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XMV| <1oR>0пo[/ʚ ,<_BiҾ ʿ~$x⏎#g }Cښ|7 {[xjVV ?Go :o>_şڷw?O_q.$&_EuKZv?bQ@կռ'Vi*CQ:O5^|g~xD_tt??ƖQx^<|O8._O~ <9H|0xwE/+ߵ?Km5?Ěំ^?hG_&7L>>x?03o2K o x/u Zv~#xP{xoh$ð[kgb:g-_j~j]6Gᯍ է|u|`5FiE;?j Me>~~eo#z)x G<q|!Z8s4&?~ O=j_  xż ^$n/RA^Cc]k$c-m{goEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEjava-design-patterns-1.18.0/servant/src/etc/servant.svg000066400000000000000000001565501322244523500230740ustar00rootroot00000000000000 UML diagram java-design-patterns App (from iluwatar) main(String[*]): void scenario(Servant[0..1], Integer): void King (from iluwatar) isHappy: Boolean complimentReceived: Boolean getFed(): void getDrink(): void receiveCompliments(): void changeMood(): void getMood(): Boolean Queen (from iluwatar) isHappy: Boolean complimentReceived: Boolean getFed(): void getDrink(): void receiveCompliments(): void changeMood(): void getMood(): Boolean setFlirtiness(Boolean): void « Interface » Royalty (from iluwatar) getFed(): void getDrink(): void changeMood(): void receiveCompliments(): void getMood(): Boolean Servant (from iluwatar) name: String[0..1] Servant(String[0..1]): void feed(Royalty[0..1]): void giveWine(Royalty[0..1]): void GiveCompliments(Royalty[0..1]): void checkIfYouWillBeHanged(Royalty[*]): Boolean 1..* « use » java-design-patterns-1.18.0/servant/src/etc/servant.xml000066400000000000000000001264341322244523500230730ustar00rootroot00000000000000

java-design-patterns-1.18.0/servant/src/main/000077500000000000000000000000001322244523500210265ustar00rootroot00000000000000java-design-patterns-1.18.0/servant/src/main/java/000077500000000000000000000000001322244523500217475ustar00rootroot00000000000000java-design-patterns-1.18.0/servant/src/main/java/com/000077500000000000000000000000001322244523500225255ustar00rootroot00000000000000java-design-patterns-1.18.0/servant/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500243555ustar00rootroot00000000000000java-design-patterns-1.18.0/servant/src/main/java/com/iluwatar/servant/000077500000000000000000000000001322244523500260375ustar00rootroot00000000000000java-design-patterns-1.18.0/servant/src/main/java/com/iluwatar/servant/App.java000066400000000000000000000053431322244523500274270ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servant; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.ArrayList; import java.util.List; /** * Servant offers some functionality to a group of classes without defining that functionality in * each of them. A Servant is a class whose instance provides methods that take care of a desired * service, while objects for which the servant does something, are taken as parameters. *

* In this example {@link Servant} is serving {@link King} and {@link Queen}. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); static Servant jenkins = new Servant("Jenkins"); static Servant travis = new Servant("Travis"); /** * Program entry point */ public static void main(String[] args) { scenario(jenkins, 1); scenario(travis, 0); } /** * Can add a List with enum Actions for variable scenarios */ public static void scenario(Servant servant, int compliment) { King k = new King(); Queen q = new Queen(); List guests = new ArrayList<>(); guests.add(k); guests.add(q); // feed servant.feed(k); servant.feed(q); // serve drinks servant.giveWine(k); servant.giveWine(q); // compliment servant.giveCompliments(guests.get(compliment)); // outcome of the night for (Royalty r : guests) { r.changeMood(); } // check your luck if (servant.checkIfYouWillBeHanged(guests)) { LOGGER.info("{} will live another day", servant.name); } else { LOGGER.info("Poor {}. His days are numbered", servant.name); } } } java-design-patterns-1.18.0/servant/src/main/java/com/iluwatar/servant/King.java000066400000000000000000000034101322244523500275700ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servant; /** * * King * */ public class King implements Royalty { private boolean isDrunk; private boolean isHungry = true; private boolean isHappy; private boolean complimentReceived; @Override public void getFed() { isHungry = false; } @Override public void getDrink() { isDrunk = true; } public void receiveCompliments() { complimentReceived = true; } @Override public void changeMood() { if (!isHungry && isDrunk) { isHappy = true; } if (complimentReceived) { isHappy = false; } } @Override public boolean getMood() { return isHappy; } } java-design-patterns-1.18.0/servant/src/main/java/com/iluwatar/servant/Queen.java000066400000000000000000000035321322244523500277620ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servant; /** * * Queen * */ public class Queen implements Royalty { private boolean isDrunk = true; private boolean isHungry; private boolean isHappy; private boolean isFlirty = true; private boolean complimentReceived; @Override public void getFed() { isHungry = false; } @Override public void getDrink() { isDrunk = true; } public void receiveCompliments() { complimentReceived = true; } @Override public void changeMood() { if (complimentReceived && isFlirty && isDrunk && !isHungry) { isHappy = true; } } @Override public boolean getMood() { return isHappy; } public void setFlirtiness(boolean f) { this.isFlirty = f; } } java-design-patterns-1.18.0/servant/src/main/java/com/iluwatar/servant/Royalty.java000066400000000000000000000024701322244523500303500ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servant; /** * * Royalty * */ interface Royalty { void getFed(); void getDrink(); void changeMood(); void receiveCompliments(); boolean getMood(); } java-design-patterns-1.18.0/servant/src/main/java/com/iluwatar/servant/Servant.java000066400000000000000000000034431322244523500303300ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servant; import java.util.List; /** * * Servant * */ public class Servant { public String name; /** * Constructor */ public Servant(String name) { this.name = name; } public void feed(Royalty r) { r.getFed(); } public void giveWine(Royalty r) { r.getDrink(); } public void giveCompliments(Royalty r) { r.receiveCompliments(); } /** * Check if we will be hanged */ public boolean checkIfYouWillBeHanged(List tableGuests) { boolean anotherDay = true; for (Royalty r : tableGuests) { if (!r.getMood()) { anotherDay = false; } } return anotherDay; } } java-design-patterns-1.18.0/servant/src/test/000077500000000000000000000000001322244523500210615ustar00rootroot00000000000000java-design-patterns-1.18.0/servant/src/test/java/000077500000000000000000000000001322244523500220025ustar00rootroot00000000000000java-design-patterns-1.18.0/servant/src/test/java/com/000077500000000000000000000000001322244523500225605ustar00rootroot00000000000000java-design-patterns-1.18.0/servant/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500244105ustar00rootroot00000000000000java-design-patterns-1.18.0/servant/src/test/java/com/iluwatar/servant/000077500000000000000000000000001322244523500260725ustar00rootroot00000000000000java-design-patterns-1.18.0/servant/src/test/java/com/iluwatar/servant/AppTest.java000066400000000000000000000025101322244523500303130ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servant; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/servant/src/test/java/com/iluwatar/servant/KingTest.java000066400000000000000000000055631322244523500304760ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servant; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Date: 12/28/15 - 9:40 PM * * @author Jeroen Meulemeester */ public class KingTest { @Test public void testHungrySoberUncomplimentedKing() { final King king = new King(); king.changeMood(); assertFalse(king.getMood()); } @Test public void testFedSoberUncomplimentedKing() { final King king = new King(); king.getFed(); king.changeMood(); assertFalse(king.getMood()); } @Test public void testHungryDrunkUncomplimentedKing() { final King king = new King(); king.getDrink(); king.changeMood(); assertFalse(king.getMood()); } @Test public void testHungrySoberComplimentedKing() { final King king = new King(); king.receiveCompliments(); king.changeMood(); assertFalse(king.getMood()); } @Test public void testFedDrunkUncomplimentedKing() { final King king = new King(); king.getFed(); king.getDrink(); king.changeMood(); assertTrue(king.getMood()); } @Test public void testFedSoberComplimentedKing() { final King king = new King(); king.getFed(); king.receiveCompliments(); king.changeMood(); assertFalse(king.getMood()); } @Test public void testFedDrunkComplimentedKing() { final King king = new King(); king.getFed(); king.getDrink(); king.receiveCompliments(); king.changeMood(); assertFalse(king.getMood()); } @Test public void testHungryDrunkComplimentedKing() { final King king = new King(); king.getDrink(); king.receiveCompliments(); king.changeMood(); assertFalse(king.getMood()); } }java-design-patterns-1.18.0/servant/src/test/java/com/iluwatar/servant/QueenTest.java000066400000000000000000000042771322244523500306640ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servant; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Date: 12/28/15 - 9:52 PM * * @author Jeroen Meulemeester */ public class QueenTest { @Test public void testNotFlirtyUncomplemented() throws Exception { final Queen queen = new Queen(); queen.setFlirtiness(false); queen.changeMood(); assertFalse(queen.getMood()); } @Test public void testNotFlirtyComplemented() throws Exception { final Queen queen = new Queen(); queen.setFlirtiness(false); queen.receiveCompliments(); queen.changeMood(); assertFalse(queen.getMood()); } @Test public void testFlirtyUncomplemented() throws Exception { final Queen queen = new Queen(); queen.changeMood(); assertFalse(queen.getMood()); } @Test public void testFlirtyComplemented() throws Exception { final Queen queen = new Queen(); queen.receiveCompliments(); queen.changeMood(); assertTrue(queen.getMood()); } }java-design-patterns-1.18.0/servant/src/test/java/com/iluwatar/servant/ServantTest.java000066400000000000000000000061641322244523500312260ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servant; import org.junit.jupiter.api.Test; import java.util.ArrayList; import java.util.List; import static org.junit.jupiter.api.Assertions.assertTrue; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.when; /** * Date: 12/28/15 - 10:02 PM * * @author Jeroen Meulemeester */ public class ServantTest { @Test public void testFeed() throws Exception { final Royalty royalty = mock(Royalty.class); final Servant servant = new Servant("test"); servant.feed(royalty); verify(royalty).getFed(); verifyNoMoreInteractions(royalty); } @Test public void testGiveWine() throws Exception { final Royalty royalty = mock(Royalty.class); final Servant servant = new Servant("test"); servant.giveWine(royalty); verify(royalty).getDrink(); verifyNoMoreInteractions(royalty); } @Test public void testGiveCompliments() throws Exception { final Royalty royalty = mock(Royalty.class); final Servant servant = new Servant("test"); servant.giveCompliments(royalty); verify(royalty).receiveCompliments(); verifyNoMoreInteractions(royalty); } @Test public void testCheckIfYouWillBeHanged() throws Exception { final Royalty goodMoodRoyalty = mock(Royalty.class); when(goodMoodRoyalty.getMood()).thenReturn(true); final Royalty badMoodRoyalty = mock(Royalty.class); when(badMoodRoyalty.getMood()).thenReturn(true); final List goodCompany = new ArrayList<>(); goodCompany.add(goodMoodRoyalty); goodCompany.add(goodMoodRoyalty); goodCompany.add(goodMoodRoyalty); final List badCompany = new ArrayList<>(); goodCompany.add(goodMoodRoyalty); goodCompany.add(goodMoodRoyalty); goodCompany.add(badMoodRoyalty); assertTrue(new Servant("test").checkIfYouWillBeHanged(goodCompany)); assertTrue(new Servant("test").checkIfYouWillBeHanged(badCompany)); } }java-design-patterns-1.18.0/service-layer/000077500000000000000000000000001322244523500204035ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/README.md000066400000000000000000000020721322244523500216630ustar00rootroot00000000000000--- layout: pattern title: Service Layer folder: service-layer permalink: /patterns/service-layer/ categories: Architectural tags: - Java - Difficulty-Intermediate --- ## Intent Service Layer is an abstraction over domain logic. Typically applications require multiple kinds of interfaces to the data they store and logic they implement: data loaders, user interfaces, integration gateways, and others. Despite their different purposes, these interfaces often need common interactions with the application to access and manipulate its data and invoke its business logic. The Service Layer fulfills this role. ![alt text](./etc/service-layer.png "Service Layer") ## Applicability Use the Service Layer pattern when * you want to encapsulate domain logic under API * you need to implement multiple interfaces with common logic and data ## Credits * [Martin Fowler - Service Layer](http://martinfowler.com/eaaCatalog/serviceLayer.html) * [Patterns of Enterprise Application Architecture](http://www.amazon.com/Patterns-Enterprise-Application-Architecture-Martin/dp/0321127420) java-design-patterns-1.18.0/service-layer/bin/000077500000000000000000000000001322244523500211535ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/bin/pom.xml000066400000000000000000000037031322244523500224730ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.0-SNAPSHOT dao org.hibernate hibernate-core com.h2database h2 junit junit test java-design-patterns-1.18.0/service-layer/etc/000077500000000000000000000000001322244523500211565ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/etc/service-layer.png000066400000000000000000002575561322244523500244620ustar00rootroot00000000000000PNG  IHDRq_5IDATxo3]{KUHPiK0KpRrx\1:rcræ&nI:Nٴ8!OJCKP`sRiS5u HZos{ete=5k{A79@- NTC4O7vP 1M0 zD` 1DL}h08Q!@ >A79@-N.NۜpGp~}A79@-v و"j CK`7vPKq?YayJ¹+͋v$+՗3L BA79@- Nу_e?)`6Cq >;Z\h)Ny-g XJAtf)7vPˆigu:Xlq'^MwNx}#F\. y.g XB z zA79@- N.Yz ~E1@7ۮ?p݈:K^[Xq9c'A@osZ$?мxxngw0Xr$&(͇ o1A@osZ^O^<}ݩ\ivA: {gKhɘĺvC :@9@-A Nw8/82 zbLn(>kK78_>]b>|u#1B_ 4}h18?F@CCybu6ny|FV!cnAW(F;%z1M0 zD` 1DL}h08Q!@ >A79@- NTC4O7vP 1M0 zD` 1J|o숵@osZ m_z|- w<~x-v/|_eſoՃ@osZ8$bu1P|T4?xo!^_&20A79@-N\$ozXn_powЫvW"qd;~1`r?}o;/~Oſ~#?xѼunL$*'ik;U:v;A79@-[N$?k&{+gVA1Z !H~w[_ՅaĸF^i^l^ mA8ʏ Gl{lG^vM'}hl38<7_pN˅F $d k-|/ol}/<7>96xyiBLM-ryn]469fuà;3 zԲgLwËڳgo ̎s"moq5!eL;v:XB2l1\a 1H~=o;/~Zlo'c=Ng9mg =]|fwqڦWoݗ}dlǍu- ǚff#?keN¯ zԲkLTϼ[u\.{|s>޼ǾCw\=?xԙ {Cm ix;3q[wuoOoGxӵpG/ѵٮyL>6˽q n|viuM-˗>αfs  ZԒbpnhdC G8֯Wچ.\Cdݦ-'ねbh&،]QѷVo|毾o݅nM45kvm]|i26mn ll釶Lta/9o;H~jfpiz"cƻ\_l; yɋF iϼM 4?m>_ӣy~?vR|Iq6ш[>ii.tۦŮ_w7 /[;~if9[YtBsZ9&q.Vc܁jtq9`8lfC4fkin;27='ZHYq<`hͻmӒVڦHFk2r`7v.B,zxI<9@- N,?h~kl`{E~pa 7Ƙ]!u%@ qom?#z1xOyxײ3)fNs˳-pp[Ͳ6mae-+%vU<;{ ;BxԲd1-'h`0peHm筗,S c-um'ĿXbo}G{w8y/ksM z /|Ap?b ]-b}I^' 9 D;%d1kni oje_]/41M5^zg;Oſ?|zYbCfmmG S'y=IJYmܹ;9ٟb|,ǧZDo'[Ē{3 qLK japYD2+1McHjapB0 &|@osZ h o'*c!`'F; b& japB0 &|@osZ "_卧/, zԲ # ծ56F;% # ]6'Jbaـ+恱4l_v,]]ׯd_td;Y?Zwlv\l鴐 c!GTXYcک̚*y5ɬ RkE lf E8k w'E7A^qNt b03` 1,{ݴ6/.̆z>lNK7: c-]NŶ6+2F;68aD!iDbhl~ݚOɿӅ3Jpk Zf(9@-AF2F t?8i+ͣ=;?c{,l/ %~Db(jlښ[֙dִMng){-=B~j #G v|ir2)ޭ5I}TqӖ}'&A79@- NTC4O7vP 1Đ*MQ>q c/3wm{o; 3v 7k[>9,OB-k[o@osZ18 /.+@ LGm}ꤒHT: ^i^pq rGweo*cM }"l7W̓f'1ۥqT%G4B"Ymf4l/~6ϻ8K뱰Sza?%7vP.kxvo˷GwmaW_|׬~01Đ?oĿ_}+L.zwҖK3&M6Kvo歧/lڒt9]O_}Gi1t V߬mc` 1ߨF+&lqΚ̙/ |w\k۸`+Bgמ?/9@-+\{ܙL\K&[zޛW|Σsܵ` 1xU;੫ݥ%\w=[hRgKl[sko9@-KDr1LxxN.?f?oM?8/fokkVپS];lYLj%֩Xb-`vP*ջ zԲm~pA79@- NTC{{LD]C!Z1PH!@ksZ h o'*c!`'F; bh&u;ףw_\zE zD` 1zo>%^Ho@osZ m-rjapB0ڪ 8'l c#ĕEMx>~Ѽ2ʉ&;o`'+Vi9&Qabh)Ie~\jםJґR zD޸u6Ĩ1Đ7~Ey @`R4A|\~p5;.d}h<854?Ȩ1ĐO|g{S/~_|\?Z>YqpƜ??[5hﺑBks?h?rOT]\X^OWlvdŽRAo'+1yټ2ݒb@ GUF O˟;rŏb57L\%Gx=nj͙nw}mj~'ͫО9i+0]yv_s/탾@osZn\0S0ۋm-.QQc!&>FXh֘ws.47l-IF8l-k[_w\4ݩl$}h<8 ~\.S9AreF W=v*?&W(.i_پf,C{2{KlfknRoA~=j$q#V*hb=u0j[{+מ=~cFQ,\[urlsw>nc'+i~pb=u0jE_Gp9n1iזok>_mA m}E;%.L^tlKhTfbȧ ?|nrldsƜ6r0W/bA;%I 7KZx< /Tu0ocK }hkp6QQcx5tq{u~kj zK(1` 1&;ceޅ!1jdz= Uu0KLl zD` 1DL}h08Q!@ >A79@- NTC4O7vP+MdW@ Hhvʟٟ5[ne4\.}-&)?8~^\$͎1JgI*phA~79@^I)ٙ:+WlZDXbMMRoAe6ʬl`:8 ?t:]n03tVlX,jzxxwT*9oiflJJݰc:ys],V 6b>L&dD1ĮAt:\Nh4lV_?}^gp)3.=jw'酸$NXfnʒs.;l^1r0<ةXQ atڼhTRFa:u:pv:ty&iWw~wwƌ$e x̜B{}n {l)Y6Bkږ,kPv9 A>/%lەRsf0tp8, {?\>V];p^JyA,f$/CR0?Y=G2m5d h鳳3^'J)u~?JuIVrfy}{>G~ȺeKtWDgY9[ͱКs/b^皫e eR4:<kˬ.U*0AC;DC.+^>;;!k!_Dr\(s-p8-s*.Wsm;}$W:?鶅*0AC;DCd2\$]R~N+ 4?rXh^#yvpfsy2Z":̛!ނrr(zi[]^Tf%T:F;Dh4* k4RIJyv핳-f2YlDі.^HN!83yz"GG岹$/uKނp4o|_ʹAZ0F;DIrѨ^!? bjSƴAZLӜE~ 1 ٬܏\.W*d]E0tn?g?@~ 0rżT*%k\:NJ&D}-$+%>E ? 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C`KڒUB%`~I|P /iݕ|!0%mo`0\A. 8;گiIENDB`java-design-patterns-1.18.0/service-layer/etc/service-layer.ucls000066400000000000000000000341531322244523500246260ustar00rootroot00000000000000 java-design-patterns-1.18.0/service-layer/pom.xml000066400000000000000000000044231322244523500217230ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 service-layer org.hibernate hibernate-core com.h2database h2 org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.mockito mockito-core test java-design-patterns-1.18.0/service-layer/src/000077500000000000000000000000001322244523500211725ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/000077500000000000000000000000001322244523500221165ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/000077500000000000000000000000001322244523500230375ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/com/000077500000000000000000000000001322244523500236155ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500254455ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/000077500000000000000000000000001322244523500301425ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/app/000077500000000000000000000000001322244523500307225ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/app/App.java000066400000000000000000000203111322244523500323020ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.app; import java.util.List; import com.iluwatar.servicelayer.magic.MagicService; import com.iluwatar.servicelayer.magic.MagicServiceImpl; import com.iluwatar.servicelayer.spell.Spell; import com.iluwatar.servicelayer.spell.SpellDao; import com.iluwatar.servicelayer.spell.SpellDaoImpl; import com.iluwatar.servicelayer.spellbook.Spellbook; import com.iluwatar.servicelayer.spellbook.SpellbookDao; import com.iluwatar.servicelayer.spellbook.SpellbookDaoImpl; import com.iluwatar.servicelayer.wizard.Wizard; import com.iluwatar.servicelayer.wizard.WizardDao; import com.iluwatar.servicelayer.wizard.WizardDaoImpl; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Service layer defines an application's boundary with a layer of services that establishes a set * of available operations and coordinates the application's response in each operation. *

* Enterprise applications typically require different kinds of interfaces to the data they store * and the logic they implement: data loaders, user interfaces, integration gateways, and others. * Despite their different purposes, these interfaces often need common interactions with the * application to access and manipulate its data and invoke its business logic. The interactions may * be complex, involving transactions across multiple resources and the coordination of several * responses to an action. Encoding the logic of the interactions separately in each interface * causes a lot of duplication. *

* The example application demonstrates interactions between a client ({@link App}) and a service ( * {@link MagicService}). The service is implemented with 3-layer architecture (entity, dao, * service). For persistence the example uses in-memory H2 database which is populated on each * application startup. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args command line args */ public static void main(String[] args) { // populate the in-memory database initData(); // query the data using the service queryData(); } /** * Initialize data */ public static void initData() { // spells Spell spell1 = new Spell("Ice dart"); Spell spell2 = new Spell("Invisibility"); Spell spell3 = new Spell("Stun bolt"); Spell spell4 = new Spell("Confusion"); Spell spell5 = new Spell("Darkness"); Spell spell6 = new Spell("Fireball"); Spell spell7 = new Spell("Enchant weapon"); Spell spell8 = new Spell("Rock armour"); Spell spell9 = new Spell("Light"); Spell spell10 = new Spell("Bee swarm"); Spell spell11 = new Spell("Haste"); Spell spell12 = new Spell("Levitation"); Spell spell13 = new Spell("Magic lock"); Spell spell14 = new Spell("Summon hell bat"); Spell spell15 = new Spell("Water walking"); Spell spell16 = new Spell("Magic storm"); Spell spell17 = new Spell("Entangle"); SpellDao spellDao = new SpellDaoImpl(); spellDao.persist(spell1); spellDao.persist(spell2); spellDao.persist(spell3); spellDao.persist(spell4); spellDao.persist(spell5); spellDao.persist(spell6); spellDao.persist(spell7); spellDao.persist(spell8); spellDao.persist(spell9); spellDao.persist(spell10); spellDao.persist(spell11); spellDao.persist(spell12); spellDao.persist(spell13); spellDao.persist(spell14); spellDao.persist(spell15); spellDao.persist(spell16); spellDao.persist(spell17); // spellbooks SpellbookDao spellbookDao = new SpellbookDaoImpl(); Spellbook spellbook1 = new Spellbook("Book of Orgymon"); spellbookDao.persist(spellbook1); spellbook1.addSpell(spell1); spellbook1.addSpell(spell2); spellbook1.addSpell(spell3); spellbook1.addSpell(spell4); spellbookDao.merge(spellbook1); Spellbook spellbook2 = new Spellbook("Book of Aras"); spellbookDao.persist(spellbook2); spellbook2.addSpell(spell5); spellbook2.addSpell(spell6); spellbookDao.merge(spellbook2); Spellbook spellbook3 = new Spellbook("Book of Kritior"); spellbookDao.persist(spellbook3); spellbook3.addSpell(spell7); spellbook3.addSpell(spell8); spellbook3.addSpell(spell9); spellbookDao.merge(spellbook3); Spellbook spellbook4 = new Spellbook("Book of Tamaex"); spellbookDao.persist(spellbook4); spellbook4.addSpell(spell10); spellbook4.addSpell(spell11); spellbook4.addSpell(spell12); spellbookDao.merge(spellbook4); Spellbook spellbook5 = new Spellbook("Book of Idores"); spellbookDao.persist(spellbook5); spellbook5.addSpell(spell13); spellbookDao.merge(spellbook5); Spellbook spellbook6 = new Spellbook("Book of Opaen"); spellbookDao.persist(spellbook6); spellbook6.addSpell(spell14); spellbook6.addSpell(spell15); spellbookDao.merge(spellbook6); Spellbook spellbook7 = new Spellbook("Book of Kihione"); spellbookDao.persist(spellbook7); spellbook7.addSpell(spell16); spellbook7.addSpell(spell17); spellbookDao.merge(spellbook7); // wizards WizardDao wizardDao = new WizardDaoImpl(); Wizard wizard1 = new Wizard("Aderlard Boud"); wizardDao.persist(wizard1); wizard1.addSpellbook(spellbookDao.findByName("Book of Orgymon")); wizard1.addSpellbook(spellbookDao.findByName("Book of Aras")); wizardDao.merge(wizard1); Wizard wizard2 = new Wizard("Anaxis Bajraktari"); wizardDao.persist(wizard2); wizard2.addSpellbook(spellbookDao.findByName("Book of Kritior")); wizard2.addSpellbook(spellbookDao.findByName("Book of Tamaex")); wizardDao.merge(wizard2); Wizard wizard3 = new Wizard("Xuban Munoa"); wizardDao.persist(wizard3); wizard3.addSpellbook(spellbookDao.findByName("Book of Idores")); wizard3.addSpellbook(spellbookDao.findByName("Book of Opaen")); wizardDao.merge(wizard3); Wizard wizard4 = new Wizard("Blasius Dehooge"); wizardDao.persist(wizard4); wizard4.addSpellbook(spellbookDao.findByName("Book of Kihione")); wizardDao.merge(wizard4); } /** * Query the data */ public static void queryData() { MagicService service = new MagicServiceImpl(new WizardDaoImpl(), new SpellbookDaoImpl(), new SpellDaoImpl()); LOGGER.info("Enumerating all wizards"); for (Wizard w : service.findAllWizards()) { LOGGER.info(w.getName()); } LOGGER.info("Enumerating all spellbooks"); for (Spellbook s : service.findAllSpellbooks()) { LOGGER.info(s.getName()); } LOGGER.info("Enumerating all spells"); for (Spell s : service.findAllSpells()) { LOGGER.info(s.getName()); } LOGGER.info("Find wizards with spellbook 'Book of Idores'"); List wizardsWithSpellbook = service.findWizardsWithSpellbook("Book of Idores"); for (Wizard w : wizardsWithSpellbook) { LOGGER.info("{} has 'Book of Idores'", w.getName()); } LOGGER.info("Find wizards with spell 'Fireball'"); List wizardsWithSpell = service.findWizardsWithSpell("Fireball"); for (Wizard w : wizardsWithSpell) { LOGGER.info("{} has 'Fireball'", w.getName()); } } } java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/common/000077500000000000000000000000001322244523500314325ustar00rootroot00000000000000BaseEntity.java000066400000000000000000000040211322244523500342620ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/common/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.common; import javax.persistence.Inheritance; import javax.persistence.InheritanceType; import javax.persistence.MappedSuperclass; import javax.persistence.Version; /** * * Base class for entities. * */ @MappedSuperclass @Inheritance(strategy = InheritanceType.TABLE_PER_CLASS) public abstract class BaseEntity { @Version private Long version; /** * Indicates the unique id of this entity * * @return The id of the entity, or 'null' when not persisted */ public abstract Long getId(); /** * Set the id of this entity * * @param id The new id */ public abstract void setId(Long id); /** * Get the name of this entity * * @return The name of the entity */ public abstract String getName(); /** * Set the name of this entity * * @param name The new name */ public abstract void setName(final String name); } java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/common/Dao.java000066400000000000000000000026231322244523500330030ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.common; import java.util.List; /** * * Dao interface. * * @param * */ public interface Dao { E find(Long id); void persist(E entity); E merge(E entity); void delete(E entity); List findAll(); } DaoBaseImpl.java000066400000000000000000000103031322244523500343330ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/common/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.common; import java.lang.reflect.ParameterizedType; import java.util.List; import org.hibernate.Criteria; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.hibernate.criterion.Restrictions; import com.iluwatar.servicelayer.hibernate.HibernateUtil; /** * * Base class for Dao implementations. * * @param * */ public abstract class DaoBaseImpl implements Dao { @SuppressWarnings("unchecked") protected Class persistentClass = (Class) ((ParameterizedType) getClass() .getGenericSuperclass()).getActualTypeArguments()[0]; /* * Making this getSessionFactory() instead of getSession() so that it is the responsibility * of the caller to open as well as close the session (prevents potential resource leak). */ protected SessionFactory getSessionFactory() { return HibernateUtil.getSessionFactory(); } @Override public E find(Long id) { Session session = getSessionFactory().openSession(); Transaction tx = null; E result = null; try { tx = session.beginTransaction(); Criteria criteria = session.createCriteria(persistentClass); criteria.add(Restrictions.idEq(id)); result = (E) criteria.uniqueResult(); tx.commit(); } catch (Exception e) { if (tx != null) { tx.rollback(); } throw e; } finally { session.close(); } return result; } @Override public void persist(E entity) { Session session = getSessionFactory().openSession(); Transaction tx = null; try { tx = session.beginTransaction(); session.persist(entity); tx.commit(); } catch (Exception e) { if (tx != null) { tx.rollback(); } throw e; } finally { session.close(); } } @Override public E merge(E entity) { Session session = getSessionFactory().openSession(); Transaction tx = null; E result = null; try { tx = session.beginTransaction(); result = (E) session.merge(entity); tx.commit(); } catch (Exception e) { if (tx != null) { tx.rollback(); } throw e; } finally { session.close(); } return result; } @Override public void delete(E entity) { Session session = getSessionFactory().openSession(); Transaction tx = null; try { tx = session.beginTransaction(); session.delete(entity); tx.commit(); } catch (Exception e) { if (tx != null) { tx.rollback(); } throw e; } finally { session.close(); } } @Override public List findAll() { Session session = getSessionFactory().openSession(); Transaction tx = null; List result = null; try { tx = session.beginTransaction(); Criteria criteria = session.createCriteria(persistentClass); result = criteria.list(); } catch (Exception e) { if (tx != null) { tx.rollback(); } throw e; } finally { session.close(); } return result; } } java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/hibernate/000077500000000000000000000000001322244523500321035ustar00rootroot00000000000000HibernateUtil.java000066400000000000000000000060571322244523500354360ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/hibernate/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.hibernate; import com.iluwatar.servicelayer.spell.Spell; import com.iluwatar.servicelayer.spellbook.Spellbook; import com.iluwatar.servicelayer.wizard.Wizard; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Produces the Hibernate {@link SessionFactory}. */ public final class HibernateUtil { private static final Logger LOGGER = LoggerFactory.getLogger(HibernateUtil.class); /** * The cached session factory */ private static volatile SessionFactory sessionFactory; private HibernateUtil() { } /** * Create the current session factory instance, create a new one when there is none yet. * * @return The session factory */ public static synchronized SessionFactory getSessionFactory() { if (sessionFactory == null) { try { sessionFactory = new Configuration().addAnnotatedClass(Wizard.class).addAnnotatedClass(Spellbook.class) .addAnnotatedClass(Spell.class) .setProperty("hibernate.dialect", "org.hibernate.dialect.H2Dialect") .setProperty("hibernate.connection.url", "jdbc:h2:mem:test;DB_CLOSE_DELAY=-1") .setProperty("hibernate.current_session_context_class", "thread") .setProperty("hibernate.show_sql", "false") .setProperty("hibernate.hbm2ddl.auto", "create-drop").buildSessionFactory(); } catch (Throwable ex) { LOGGER.error("Initial SessionFactory creation failed.", ex); throw new ExceptionInInitializerError(ex); } } return sessionFactory; } /** * Drop the current connection, resulting in a create-drop clean database next time. This is * mainly used for JUnit testing since one test should not influence the other */ public static void dropSession() { getSessionFactory().close(); sessionFactory = null; } } java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/magic/000077500000000000000000000000001322244523500312225ustar00rootroot00000000000000MagicService.java000066400000000000000000000031541322244523500343520ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/magic/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.magic; import java.util.List; import com.iluwatar.servicelayer.spell.Spell; import com.iluwatar.servicelayer.spellbook.Spellbook; import com.iluwatar.servicelayer.wizard.Wizard; /** * * Service interface. * */ public interface MagicService { List findAllWizards(); List findAllSpellbooks(); List findAllSpells(); List findWizardsWithSpellbook(String name); List findWizardsWithSpell(String name); } MagicServiceImpl.java000066400000000000000000000051401322244523500351710ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/magic/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.magic; import java.util.ArrayList; import java.util.List; import com.iluwatar.servicelayer.spell.Spell; import com.iluwatar.servicelayer.spell.SpellDao; import com.iluwatar.servicelayer.spellbook.Spellbook; import com.iluwatar.servicelayer.spellbook.SpellbookDao; import com.iluwatar.servicelayer.wizard.Wizard; import com.iluwatar.servicelayer.wizard.WizardDao; /** * * Service implementation. * */ public class MagicServiceImpl implements MagicService { private WizardDao wizardDao; private SpellbookDao spellbookDao; private SpellDao spellDao; /** * Constructor */ public MagicServiceImpl(WizardDao wizardDao, SpellbookDao spellbookDao, SpellDao spellDao) { this.wizardDao = wizardDao; this.spellbookDao = spellbookDao; this.spellDao = spellDao; } @Override public List findAllWizards() { return wizardDao.findAll(); } @Override public List findAllSpellbooks() { return spellbookDao.findAll(); } @Override public List findAllSpells() { return spellDao.findAll(); } @Override public List findWizardsWithSpellbook(String name) { Spellbook spellbook = spellbookDao.findByName(name); return new ArrayList<>(spellbook.getWizards()); } @Override public List findWizardsWithSpell(String name) { Spell spell = spellDao.findByName(name); Spellbook spellbook = spell.getSpellbook(); return new ArrayList<>(spellbook.getWizards()); } } java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/spell/000077500000000000000000000000001322244523500312615ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/spell/Spell.java000066400000000000000000000045151322244523500332100ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.spell; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.JoinColumn; import javax.persistence.ManyToOne; import javax.persistence.Table; import com.iluwatar.servicelayer.common.BaseEntity; import com.iluwatar.servicelayer.spellbook.Spellbook; /** * * Spell entity. * */ @Entity @Table(name = "SPELL") public class Spell extends BaseEntity { private String name; @Id @GeneratedValue @Column(name = "SPELL_ID") private Long id; @ManyToOne @JoinColumn(name = "SPELLBOOK_ID_FK", referencedColumnName = "SPELLBOOK_ID") private Spellbook spellbook; public Spell() {} public Spell(String name) { this(); this.name = name; } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Spellbook getSpellbook() { return spellbook; } public void setSpellbook(Spellbook spellbook) { this.spellbook = spellbook; } @Override public String toString() { return name; } } SpellDao.java000066400000000000000000000025131322244523500335510ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/spell/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.spell; import com.iluwatar.servicelayer.common.Dao; /** * * SpellDao interface. * */ public interface SpellDao extends Dao { Spell findByName(String name); } SpellDaoImpl.java000066400000000000000000000040211322244523500343670ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/spell/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.spell; import com.iluwatar.servicelayer.common.DaoBaseImpl; import org.hibernate.Criteria; import org.hibernate.Session; import org.hibernate.Transaction; import org.hibernate.criterion.Restrictions; /** * * SpellDao implementation. * */ public class SpellDaoImpl extends DaoBaseImpl implements SpellDao { @Override public Spell findByName(String name) { Session session = getSessionFactory().openSession(); Transaction tx = null; Spell result = null; try { tx = session.beginTransaction(); Criteria criteria = session.createCriteria(persistentClass); criteria.add(Restrictions.eq("name", name)); result = (Spell) criteria.uniqueResult(); tx.commit(); } catch (Exception e) { if (tx != null) { tx.rollback(); } throw e; } finally { session.close(); } return result; } } java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/spellbook/000077500000000000000000000000001322244523500321345ustar00rootroot00000000000000Spellbook.java000066400000000000000000000056021322244523500346550ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/spellbook/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.spellbook; import java.util.HashSet; import java.util.Set; import javax.persistence.CascadeType; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.FetchType; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.ManyToMany; import javax.persistence.OneToMany; import javax.persistence.Table; import com.iluwatar.servicelayer.common.BaseEntity; import com.iluwatar.servicelayer.spell.Spell; import com.iluwatar.servicelayer.wizard.Wizard; /** * * Spellbook entity. * */ @Entity @Table(name = "SPELLBOOK") public class Spellbook extends BaseEntity { @Id @GeneratedValue @Column(name = "SPELLBOOK_ID") private Long id; private String name; @ManyToMany(mappedBy = "spellbooks", fetch = FetchType.EAGER) private Set wizards; @OneToMany(mappedBy = "spellbook", orphanRemoval = true, cascade = CascadeType.ALL) private Set spells; public Spellbook() { spells = new HashSet<>(); wizards = new HashSet<>(); } public Spellbook(String name) { this(); this.name = name; } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Set getWizards() { return wizards; } public void setWizards(Set wizards) { this.wizards = wizards; } public Set getSpells() { return spells; } public void setSpells(Set spells) { this.spells = spells; } public void addSpell(Spell spell) { spell.setSpellbook(this); spells.add(spell); } @Override public String toString() { return name; } } SpellbookDao.java000066400000000000000000000025371322244523500353050ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/spellbook/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.spellbook; import com.iluwatar.servicelayer.common.Dao; /** * * SpellbookDao interface. * */ public interface SpellbookDao extends Dao { Spellbook findByName(String name); } SpellbookDaoImpl.java000066400000000000000000000041651322244523500361260ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/spellbook/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.spellbook; import org.hibernate.Criteria; import org.hibernate.Session; import org.hibernate.Transaction; import org.hibernate.criterion.Restrictions; import com.iluwatar.servicelayer.common.DaoBaseImpl; /** * * SpellbookDao implementation. * */ public class SpellbookDaoImpl extends DaoBaseImpl implements SpellbookDao { @Override public Spellbook findByName(String name) { Session session = getSessionFactory().openSession(); Transaction tx = null; Spellbook result = null; try { tx = session.beginTransaction(); Criteria criteria = session.createCriteria(persistentClass); criteria.add(Restrictions.eq("name", name)); result = (Spellbook) criteria.uniqueResult(); result.getSpells().size(); result.getWizards().size(); tx.commit(); } catch (Exception e) { if (tx != null) { tx.rollback(); } throw e; } finally { session.close(); } return result; } } java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/wizard/000077500000000000000000000000001322244523500314425ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/wizard/Wizard.java000066400000000000000000000050131322244523500335440ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.wizard; import java.util.HashSet; import java.util.Set; import javax.persistence.CascadeType; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.ManyToMany; import javax.persistence.Table; import com.iluwatar.servicelayer.common.BaseEntity; import com.iluwatar.servicelayer.spellbook.Spellbook; /** * * Wizard entity. * */ @Entity @Table(name = "WIZARD") public class Wizard extends BaseEntity { @Id @GeneratedValue @Column(name = "WIZARD_ID") private Long id; private String name; @ManyToMany(cascade = CascadeType.ALL) private Set spellbooks; public Wizard() { spellbooks = new HashSet<>(); } public Wizard(String name) { this(); this.name = name; } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Set getSpellbooks() { return spellbooks; } public void setSpellbooks(Set spellbooks) { this.spellbooks = spellbooks; } public void addSpellbook(Spellbook spellbook) { spellbook.getWizards().add(this); spellbooks.add(spellbook); } @Override public String toString() { return name; } } WizardDao.java000066400000000000000000000025201322244523500341110ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/wizard/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.wizard; import com.iluwatar.servicelayer.common.Dao; /** * * WizardDao interface. * */ public interface WizardDao extends Dao { Wizard findByName(String name); } WizardDaoImpl.java000066400000000000000000000042501322244523500347350ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/java/com/iluwatar/servicelayer/wizard/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.wizard; import org.hibernate.Criteria; import org.hibernate.Session; import org.hibernate.Transaction; import org.hibernate.criterion.Restrictions; import com.iluwatar.servicelayer.common.DaoBaseImpl; import com.iluwatar.servicelayer.spellbook.Spellbook; /** * * WizardDao implementation. * */ public class WizardDaoImpl extends DaoBaseImpl implements WizardDao { @Override public Wizard findByName(String name) { Session session = getSessionFactory().openSession(); Transaction tx = null; Wizard result = null; try { tx = session.beginTransaction(); Criteria criteria = session.createCriteria(persistentClass); criteria.add(Restrictions.eq("name", name)); result = (Wizard) criteria.uniqueResult(); for (Spellbook s : result.getSpellbooks()) { s.getSpells().size(); } tx.commit(); } catch (Exception e) { if (tx != null) { tx.rollback(); } throw e; } finally { session.close(); } return result; } } java-design-patterns-1.18.0/service-layer/src/main/resources/000077500000000000000000000000001322244523500241305ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/main/resources/logback.xml000066400000000000000000000042031322244523500262530ustar00rootroot00000000000000 service-layer.log service-layer-%d.log 5 %-5p [%d{ISO8601,UTC}] %c: %m%n %-5p [%d{ISO8601,UTC}] %c: %m%n java-design-patterns-1.18.0/service-layer/src/test/000077500000000000000000000000001322244523500221515ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/test/java/000077500000000000000000000000001322244523500230725ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/test/java/com/000077500000000000000000000000001322244523500236505ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500255005ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/test/java/com/iluwatar/servicelayer/000077500000000000000000000000001322244523500301755ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/test/java/com/iluwatar/servicelayer/app/000077500000000000000000000000001322244523500307555ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/test/java/com/iluwatar/servicelayer/app/AppTest.java000066400000000000000000000030231322244523500331760ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.app; import com.iluwatar.servicelayer.hibernate.HibernateUtil; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } @AfterEach public void tearDown() throws Exception { HibernateUtil.dropSession(); } } java-design-patterns-1.18.0/service-layer/src/test/java/com/iluwatar/servicelayer/common/000077500000000000000000000000001322244523500314655ustar00rootroot00000000000000BaseDaoTest.java000066400000000000000000000110331322244523500344050ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/test/java/com/iluwatar/servicelayer/common/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.common; import com.iluwatar.servicelayer.hibernate.HibernateUtil; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import java.util.List; import java.util.concurrent.atomic.AtomicInteger; import java.util.function.Function; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertNull; /** * Date: 12/28/15 - 10:53 PM * Test for Base Data Access Objects * @param Type of Base Entity * @param Type of Dao Base Implementation * @author Jeroen Meulemeester */ public abstract class BaseDaoTest> { /** * The number of entities stored before each test */ private static final int INITIAL_COUNT = 5; /** * The unique id generator, shared between all entities */ private static final AtomicInteger ID_GENERATOR = new AtomicInteger(); /** * Factory, used to create new entity instances with the given name */ private final Function factory; /** * The tested data access object */ private final D dao; /** * Create a new test using the given factory and dao * * @param factory The factory, used to create new entity instances with the given name * @param dao The tested data access object */ public BaseDaoTest(final Function factory, final D dao) { this.factory = factory; this.dao = dao; } @BeforeEach public void setUp() throws Exception { for (int i = 0; i < INITIAL_COUNT; i++) { final String className = dao.persistentClass.getSimpleName(); final String entityName = String.format("%s%d", className, ID_GENERATOR.incrementAndGet()); this.dao.persist(this.factory.apply(entityName)); } } @AfterEach public void tearDown() throws Exception { HibernateUtil.dropSession(); } protected final D getDao() { return this.dao; } @Test public void testFind() throws Exception { final List all = this.dao.findAll(); for (final E entity : all) { final E byId = this.dao.find(entity.getId()); assertNotNull(byId); assertEquals(byId.getId(), byId.getId()); } } @Test public void testDelete() throws Exception { final List originalEntities = this.dao.findAll(); this.dao.delete(originalEntities.get(1)); this.dao.delete(originalEntities.get(2)); final List entitiesLeft = this.dao.findAll(); assertNotNull(entitiesLeft); assertEquals(INITIAL_COUNT - 2, entitiesLeft.size()); } @Test public void testFindAll() throws Exception { final List all = this.dao.findAll(); assertNotNull(all); assertEquals(INITIAL_COUNT, all.size()); } @Test public void testSetId() throws Exception { final E entity = this.factory.apply("name"); assertNull(entity.getId()); final Long expectedId = Long.valueOf(1); entity.setId(expectedId); assertEquals(expectedId, entity.getId()); } @Test public void testSetName() throws Exception { final E entity = this.factory.apply("name"); assertEquals("name", entity.getName()); assertEquals("name", entity.toString()); final String expectedName = "new name"; entity.setName(expectedName); assertEquals(expectedName, entity.getName()); assertEquals(expectedName, entity.toString()); } } java-design-patterns-1.18.0/service-layer/src/test/java/com/iluwatar/servicelayer/magic/000077500000000000000000000000001322244523500312555ustar00rootroot00000000000000MagicServiceImplTest.java000066400000000000000000000135161322244523500360720ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/test/java/com/iluwatar/servicelayer/magic/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.magic; import com.iluwatar.servicelayer.spell.Spell; import com.iluwatar.servicelayer.spell.SpellDao; import com.iluwatar.servicelayer.spellbook.Spellbook; import com.iluwatar.servicelayer.spellbook.SpellbookDao; import com.iluwatar.servicelayer.wizard.Wizard; import com.iluwatar.servicelayer.wizard.WizardDao; import org.junit.jupiter.api.Test; import java.util.HashSet; import java.util.List; import java.util.Set; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; import static org.mockito.Mockito.when; /** * Date: 12/29/15 - 12:06 AM * * @author Jeroen Meulemeester */ public class MagicServiceImplTest { @Test public void testFindAllWizards() throws Exception { final WizardDao wizardDao = mock(WizardDao.class); final SpellbookDao spellbookDao = mock(SpellbookDao.class); final SpellDao spellDao = mock(SpellDao.class); final MagicServiceImpl service = new MagicServiceImpl(wizardDao, spellbookDao, spellDao); verifyZeroInteractions(wizardDao, spellbookDao, spellDao); service.findAllWizards(); verify(wizardDao).findAll(); verifyNoMoreInteractions(wizardDao, spellbookDao, spellDao); } @Test public void testFindAllSpellbooks() throws Exception { final WizardDao wizardDao = mock(WizardDao.class); final SpellbookDao spellbookDao = mock(SpellbookDao.class); final SpellDao spellDao = mock(SpellDao.class); final MagicServiceImpl service = new MagicServiceImpl(wizardDao, spellbookDao, spellDao); verifyZeroInteractions(wizardDao, spellbookDao, spellDao); service.findAllSpellbooks(); verify(spellbookDao).findAll(); verifyNoMoreInteractions(wizardDao, spellbookDao, spellDao); } @Test public void testFindAllSpells() throws Exception { final WizardDao wizardDao = mock(WizardDao.class); final SpellbookDao spellbookDao = mock(SpellbookDao.class); final SpellDao spellDao = mock(SpellDao.class); final MagicServiceImpl service = new MagicServiceImpl(wizardDao, spellbookDao, spellDao); verifyZeroInteractions(wizardDao, spellbookDao, spellDao); service.findAllSpells(); verify(spellDao).findAll(); verifyNoMoreInteractions(wizardDao, spellbookDao, spellDao); } @Test public void testFindWizardsWithSpellbook() throws Exception { final String bookname = "bookname"; final Spellbook spellbook = mock(Spellbook.class); final Set wizards = new HashSet<>(); wizards.add(mock(Wizard.class)); wizards.add(mock(Wizard.class)); wizards.add(mock(Wizard.class)); when(spellbook.getWizards()).thenReturn(wizards); final SpellbookDao spellbookDao = mock(SpellbookDao.class); when(spellbookDao.findByName(eq(bookname))).thenReturn(spellbook); final WizardDao wizardDao = mock(WizardDao.class); final SpellDao spellDao = mock(SpellDao.class); final MagicServiceImpl service = new MagicServiceImpl(wizardDao, spellbookDao, spellDao); verifyZeroInteractions(wizardDao, spellbookDao, spellDao, spellbook); final List result = service.findWizardsWithSpellbook(bookname); verify(spellbookDao).findByName(eq(bookname)); verify(spellbook).getWizards(); assertNotNull(result); assertEquals(3, result.size()); verifyNoMoreInteractions(wizardDao, spellbookDao, spellDao); } @Test public void testFindWizardsWithSpell() throws Exception { final Set wizards = new HashSet<>(); wizards.add(mock(Wizard.class)); wizards.add(mock(Wizard.class)); wizards.add(mock(Wizard.class)); final Spellbook spellbook = mock(Spellbook.class); when(spellbook.getWizards()).thenReturn(wizards); final SpellbookDao spellbookDao = mock(SpellbookDao.class); final WizardDao wizardDao = mock(WizardDao.class); final Spell spell = mock(Spell.class); when(spell.getSpellbook()).thenReturn(spellbook); final String spellName = "spellname"; final SpellDao spellDao = mock(SpellDao.class); when(spellDao.findByName(eq(spellName))).thenReturn(spell); final MagicServiceImpl service = new MagicServiceImpl(wizardDao, spellbookDao, spellDao); verifyZeroInteractions(wizardDao, spellbookDao, spellDao, spellbook); final List result = service.findWizardsWithSpell(spellName); verify(spellDao).findByName(eq(spellName)); verify(spellbook).getWizards(); assertNotNull(result); assertEquals(3, result.size()); verifyNoMoreInteractions(wizardDao, spellbookDao, spellDao); } } java-design-patterns-1.18.0/service-layer/src/test/java/com/iluwatar/servicelayer/spell/000077500000000000000000000000001322244523500313145ustar00rootroot00000000000000SpellDaoImplTest.java000066400000000000000000000040171322244523500352670ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/test/java/com/iluwatar/servicelayer/spell/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.spell; import com.iluwatar.servicelayer.common.BaseDaoTest; import org.junit.jupiter.api.Test; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; /** * Date: 12/28/15 - 11:02 PM * * @author Jeroen Meulemeester */ public class SpellDaoImplTest extends BaseDaoTest { public SpellDaoImplTest() { super(Spell::new, new SpellDaoImpl()); } @Test public void testFindByName() throws Exception { final SpellDaoImpl dao = getDao(); final List allSpells = dao.findAll(); for (final Spell spell : allSpells) { final Spell spellByName = dao.findByName(spell.getName()); assertNotNull(spellByName); assertEquals(spell.getId(), spellByName.getId()); assertEquals(spell.getName(), spellByName.getName()); } } } java-design-patterns-1.18.0/service-layer/src/test/java/com/iluwatar/servicelayer/spellbook/000077500000000000000000000000001322244523500321675ustar00rootroot00000000000000SpellbookDaoImplTest.java000066400000000000000000000040651322244523500370200ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/test/java/com/iluwatar/servicelayer/spellbook/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.spellbook; import com.iluwatar.servicelayer.common.BaseDaoTest; import org.junit.jupiter.api.Test; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; /** * Date: 12/28/15 - 11:44 PM * * @author Jeroen Meulemeester */ public class SpellbookDaoImplTest extends BaseDaoTest { public SpellbookDaoImplTest() { super(Spellbook::new, new SpellbookDaoImpl()); } @Test public void testFindByName() throws Exception { final SpellbookDaoImpl dao = getDao(); final List allBooks = dao.findAll(); for (final Spellbook book : allBooks) { final Spellbook spellByName = dao.findByName(book.getName()); assertNotNull(spellByName); assertEquals(book.getId(), spellByName.getId()); assertEquals(book.getName(), spellByName.getName()); } } } java-design-patterns-1.18.0/service-layer/src/test/java/com/iluwatar/servicelayer/wizard/000077500000000000000000000000001322244523500314755ustar00rootroot00000000000000WizardDaoImplTest.java000066400000000000000000000040101322244523500356220ustar00rootroot00000000000000java-design-patterns-1.18.0/service-layer/src/test/java/com/iluwatar/servicelayer/wizard/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelayer.wizard; import com.iluwatar.servicelayer.common.BaseDaoTest; import org.junit.jupiter.api.Test; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; /** * Date: 12/28/15 - 11:46 PM * * @author Jeroen Meulemeester */ public class WizardDaoImplTest extends BaseDaoTest { public WizardDaoImplTest() { super(Wizard::new, new WizardDaoImpl()); } @Test public void testFindByName() throws Exception { final WizardDaoImpl dao = getDao(); final List allWizards = dao.findAll(); for (final Wizard spell : allWizards) { final Wizard byName = dao.findByName(spell.getName()); assertNotNull(byName); assertEquals(spell.getId(), byName.getId()); assertEquals(spell.getName(), byName.getName()); } } } java-design-patterns-1.18.0/service-locator/000077500000000000000000000000001322244523500207325ustar00rootroot00000000000000java-design-patterns-1.18.0/service-locator/README.md000066400000000000000000000026721322244523500222200ustar00rootroot00000000000000--- layout: pattern title: Service Locator folder: service-locator permalink: /patterns/service-locator/ categories: Structural tags: - Java - Difficulty-Beginner - Performance --- ## Intent Encapsulate the processes involved in obtaining a service with a strong abstraction layer. ![alt text](./etc/service-locator.png "Service Locator") ## Applicability The service locator pattern is applicable whenever we want to locate/fetch various services using JNDI which, typically, is a redundant and expensive lookup. The service Locator pattern addresses this expensive lookup by making use of caching techniques ie. for the very first time a particular service is requested, the service Locator looks up in JNDI, fetched the relevant service and then finally caches this service object. Now, further lookups of the same service via Service Locator is done in its cache which improves the performance of application to great extent. ## Typical Use Case * when network hits are expensive and time consuming * lookups of services are done quite frequently * large number of services are being used ## Consequences * Violates Interface Segregation Principle (ISP) by providing pattern consumers with an access to a number of services that they don't potentially need. * Creates hidden dependencies that can break the clients at runtime. ## Credits * [J2EE Design Patterns](http://www.amazon.com/J2EE-Design-Patterns-William-Crawford/dp/0596004273/ref=sr_1_2) java-design-patterns-1.18.0/service-locator/etc/000077500000000000000000000000001322244523500215055ustar00rootroot00000000000000java-design-patterns-1.18.0/service-locator/etc/service-locator.png000066400000000000000000000401771322244523500253250ustar00rootroot00000000000000PNG  IHDRz5P@FIDATx}m%E5&'&Ώ?&hAON\=r r :"pPfdPpУ{@W3@X!9cG5נܷꮪ~<ݫꭧߪzkX*پu :je[(`"[`%7⇭`dL`Ql r3"Bn@܌/!7#"At{}f=f!7m K㖛IHrӖ~$?[ql&z;e$l~<ӯ$0ʽ~Z7ジR֣ׄk2Rwdw.iv rK ‡$7y̚R7Jc%K]?F3eaw4+1 ,͇@Wrcr K7;gؘΏovRhv ?rKke78T)N׏Q'=+Rxv' ލs|XZ rFtiηEf c\*4e`ItgH=1 , c72TU8YR^̈Chk:0Iڟ (=MZFy3#XZ AnX_.7 i<Ɣ8! 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelocator; /** * * The Service Locator pattern is a design pattern used in software development to encapsulate the * processes involved in obtaining a service with a strong abstraction layer. This pattern uses a * central registry known as the "service locator", which on request returns the information * necessary to perform a certain task. *

* In this example we use the Service locator pattern to lookup JNDI-services and cache them for * subsequent requests. *

* * @author saifasif * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { Service service = ServiceLocator.getService("jndi/serviceA"); service.execute(); service = ServiceLocator.getService("jndi/serviceB"); service.execute(); service = ServiceLocator.getService("jndi/serviceA"); service.execute(); service = ServiceLocator.getService("jndi/serviceA"); service.execute(); } } InitContext.java000066400000000000000000000042131322244523500340540ustar00rootroot00000000000000java-design-patterns-1.18.0/service-locator/src/main/java/com/iluwatar/servicelocator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelocator; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * For JNDI lookup of services from the web.xml. Will match name of the service name that is being * requested and return a newly created service object with the name * * @author saifasif */ public class InitContext { private static final Logger LOGGER = LoggerFactory.getLogger(InitContext.class); /** * Perform the lookup based on the service name. The returned object will need to be casted into a * {@link Service} * * @param serviceName a string * @return an {@link Object} */ public Object lookup(String serviceName) { if (serviceName.equals("jndi/serviceA")) { LOGGER.info("Looking up service A and creating new service for A"); return new ServiceImpl("jndi/serviceA"); } else if (serviceName.equals("jndi/serviceB")) { LOGGER.info("Looking up service B and creating new service for B"); return new ServiceImpl("jndi/serviceB"); } else { return null; } } } java-design-patterns-1.18.0/service-locator/src/main/java/com/iluwatar/servicelocator/Service.java000066400000000000000000000032121322244523500332610ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelocator; /** * This is going to be the parent service interface which we will use to create our services. All * services will have a

  • service name
  • unique id
  • execution work flow
    • * * @author saifasif * */ public interface Service { /* * The human readable name of the service */ String getName(); /* * Unique ID of the particular service */ int getId(); /* * The workflow method that defines what this service does */ void execute(); } ServiceCache.java000066400000000000000000000051751322244523500341400ustar00rootroot00000000000000java-design-patterns-1.18.0/service-locator/src/main/java/com/iluwatar/servicelocator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelocator; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.HashMap; import java.util.Map; /** * The service cache implementation which will cache services that are being created. On first hit, * the cache will be empty and thus any service that is being requested, will be created fresh and * then placed into the cache map. On next hit, if same service name will be requested, it will be * returned from the cache * * @author saifasif */ public class ServiceCache { private static final Logger LOGGER = LoggerFactory.getLogger(ServiceCache.class); private final Map serviceCache; public ServiceCache() { serviceCache = new HashMap<>(); } /** * Get the service from the cache. null if no service is found matching the name * * @param serviceName a string * @return {@link Service} */ public Service getService(String serviceName) { Service cachedService = null; for (String serviceJndiName : serviceCache.keySet()) { if (serviceJndiName.equals(serviceName)) { cachedService = serviceCache.get(serviceJndiName); LOGGER.info("(cache call) Fetched service {}({}) from cache... !", cachedService.getName(), cachedService.getId()); } } return cachedService; } /** * Adds the service into the cache map * * @param newService a {@link Service} */ public void addService(Service newService) { serviceCache.put(newService.getName(), newService); } } ServiceImpl.java000066400000000000000000000042461322244523500340340ustar00rootroot00000000000000java-design-patterns-1.18.0/service-locator/src/main/java/com/iluwatar/servicelocator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelocator; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * This is a single service implementation of a sample service. This is the actual service that will * process the request. The reference for this service is to be looked upon in the JNDI server that * can be set in the web.xml deployment descriptor * * @author saifasif */ public class ServiceImpl implements Service { private static final Logger LOGGER = LoggerFactory.getLogger(ServiceImpl.class); private final String serviceName; private final int id; /** * Constructor */ public ServiceImpl(String serviceName) { // set the service name this.serviceName = serviceName; // Generate a random id to this service object this.id = (int) Math.floor(Math.random() * 1000) + 1; } @Override public String getName() { return serviceName; } @Override public int getId() { return id; } @Override public void execute() { LOGGER.info("Service {} is now executing with id {}", getName(), getId()); } } ServiceLocator.java000066400000000000000000000045131322244523500345330ustar00rootroot00000000000000java-design-patterns-1.18.0/service-locator/src/main/java/com/iluwatar/servicelocator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelocator; /** * The service locator module. Will fetch service from cache, otherwise creates a fresh service and * update cache * * @author saifasif */ public final class ServiceLocator { private static ServiceCache serviceCache = new ServiceCache(); private ServiceLocator() { } /** * Fetch the service with the name param from the cache first, if no service is found, lookup the * service from the {@link InitContext} and then add the newly created service into the cache map * for future requests. * * @param serviceJndiName a string * @return {@link Service} */ public static Service getService(String serviceJndiName) { Service serviceObj = serviceCache.getService(serviceJndiName); if (serviceObj != null) { return serviceObj; } else { /* * If we are unable to retrive anything from cache, then lookup the service and add it in the * cache map */ InitContext ctx = new InitContext(); serviceObj = (Service) ctx.lookup(serviceJndiName); if (serviceObj != null) { // Only cache a service if it actually exists serviceCache.addService(serviceObj); } return serviceObj; } } } java-design-patterns-1.18.0/service-locator/src/test/000077500000000000000000000000001322244523500225005ustar00rootroot00000000000000java-design-patterns-1.18.0/service-locator/src/test/java/000077500000000000000000000000001322244523500234215ustar00rootroot00000000000000java-design-patterns-1.18.0/service-locator/src/test/java/com/000077500000000000000000000000001322244523500241775ustar00rootroot00000000000000java-design-patterns-1.18.0/service-locator/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500260275ustar00rootroot00000000000000java-design-patterns-1.18.0/service-locator/src/test/java/com/iluwatar/servicelocator/000077500000000000000000000000001322244523500310535ustar00rootroot00000000000000java-design-patterns-1.18.0/service-locator/src/test/java/com/iluwatar/servicelocator/AppTest.java000066400000000000000000000025171322244523500333030ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelocator; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } ServiceLocatorTest.java000066400000000000000000000047631322244523500354350ustar00rootroot00000000000000java-design-patterns-1.18.0/service-locator/src/test/java/com/iluwatar/servicelocator/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.servicelocator; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertNull; import static org.junit.jupiter.api.Assertions.assertSame; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Date: 12/29/15 - 19:07 PM * * @author Jeroen Meulemeester */ public class ServiceLocatorTest { /** * Verify if we just receive 'null' when requesting a non-existing service */ @Test public void testGetNonExistentService() { assertNull(ServiceLocator.getService("fantastic/unicorn/service")); assertNull(ServiceLocator.getService("another/fantastic/unicorn/service")); } /** * Verify if we get the same cached instance when requesting the same service twice */ @Test public void testServiceCache() { final String[] serviceNames = new String[]{ "jndi/serviceA", "jndi/serviceB" }; for (final String serviceName : serviceNames) { final Service service = ServiceLocator.getService(serviceName); assertNotNull(service); assertEquals(serviceName, service.getName()); assertTrue(service.getId() > 0); // The id is generated randomly, but the minimum value is '1' assertSame(service, ServiceLocator.getService(serviceName)); } } }java-design-patterns-1.18.0/singleton/000077500000000000000000000000001322244523500176335ustar00rootroot00000000000000java-design-patterns-1.18.0/singleton/README.md000066400000000000000000000051241322244523500211140ustar00rootroot00000000000000--- layout: pattern title: Singleton folder: singleton permalink: /patterns/singleton/ categories: Creational tags: - Java - Gang Of Four - Difficulty-Beginner --- ## Intent Ensure a class only has one instance, and provide a global point of access to it. ## Explanation Real world example > There can only be one ivory tower where the wizards study their magic. The same enchanted ivory tower is always used by the wizards. Ivory tower here is singleton. In plain words > Ensures that only one object of a particular class is ever created. Wikipedia says > In software engineering, the singleton pattern is a software design pattern that restricts the instantiation of a class to one object. This is useful when exactly one object is needed to coordinate actions across the system. **Programmatic Example** Joshua Bloch, Effective Java 2nd Edition p.18 > A single-element enum type is the best way to implement a singleton ``` public enum EnumIvoryTower { INSTANCE; } ``` Then in order to use ``` EnumIvoryTower enumIvoryTower1 = EnumIvoryTower.INSTANCE; EnumIvoryTower enumIvoryTower2 = EnumIvoryTower.INSTANCE; assertEquals(enumIvoryTower1, enumIvoryTower2); // true ``` ## Applicability Use the Singleton pattern when * there must be exactly one instance of a class, and it must be accessible to clients from a well-known access point * when the sole instance should be extensible by subclassing, and clients should be able to use an extended instance without modifying their code ## Typical Use Case * the logging class * managing a connection to a database * file manager ## Real world examples * [java.lang.Runtime#getRuntime()](http://docs.oracle.com/javase/8/docs/api/java/lang/Runtime.html#getRuntime%28%29) * [java.awt.Desktop#getDesktop()](http://docs.oracle.com/javase/8/docs/api/java/awt/Desktop.html#getDesktop--) * [java.lang.System#getSecurityManager()](http://docs.oracle.com/javase/8/docs/api/java/lang/System.html#getSecurityManager--) ## Consequences * Violates Single Responsibility Principle (SRP) by controlling their own creation and lifecycle. * Encourages using a global shared instance which prevents an object and resources used by this object from being deallocated. * Creates tightly coupled code. The clients of the Singleton become difficult to test. * Makes it almost impossible to subclass a Singleton. ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) * [Effective Java (2nd Edition)](http://www.amazon.com/Effective-Java-Edition-Joshua-Bloch/dp/0321356683) java-design-patterns-1.18.0/singleton/pom.xml000066400000000000000000000036461322244523500211610ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 singleton org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/singleton/src/000077500000000000000000000000001322244523500204225ustar00rootroot00000000000000java-design-patterns-1.18.0/singleton/src/main/000077500000000000000000000000001322244523500213465ustar00rootroot00000000000000java-design-patterns-1.18.0/singleton/src/main/java/000077500000000000000000000000001322244523500222675ustar00rootroot00000000000000java-design-patterns-1.18.0/singleton/src/main/java/com/000077500000000000000000000000001322244523500230455ustar00rootroot00000000000000java-design-patterns-1.18.0/singleton/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500246755ustar00rootroot00000000000000java-design-patterns-1.18.0/singleton/src/main/java/com/iluwatar/singleton/000077500000000000000000000000001322244523500266775ustar00rootroot00000000000000java-design-patterns-1.18.0/singleton/src/main/java/com/iluwatar/singleton/App.java000066400000000000000000000121261322244523500302640ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.singleton; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Singleton pattern ensures that the class can have only one existing instance per Java classloader * instance and provides global access to it. *

    * One of the risks of this pattern is that bugs resulting from setting a singleton up in a * distributed environment can be tricky to debug, since it will work fine if you debug with a * single classloader. Additionally, these problems can crop up a while after the implementation of * a singleton, since they may start out synchronous and only become async with time, so you it may * not be clear why you are seeing certain changes in behaviour. *

    * There are many ways to implement the Singleton. The first one is the eagerly initialized instance * in {@link IvoryTower}. Eager initialization implies that the implementation is thread safe. If * you can afford giving up control of the instantiation moment, then this implementation will suit * you fine. *

    * The other option to implement eagerly initialized Singleton is enum based Singleton. The example * is found in {@link EnumIvoryTower}. At first glance the code looks short and simple. However, you * should be aware of the downsides including committing to implementation strategy, extending the * enum class, serializability and restrictions to coding. These are extensively discussed in Stack * Overflow: * http://programmers.stackexchange.com/questions/179386/what-are-the-downsides-of-implementing * -a-singleton-with-javas-enum *

    * {@link ThreadSafeLazyLoadedIvoryTower} is a Singleton implementation that is initialized on * demand. The downside is that it is very slow to access since the whole access method is * synchronized. *

    * Another Singleton implementation that is initialized on demand is found in * {@link ThreadSafeDoubleCheckLocking}. It is somewhat faster than * {@link ThreadSafeLazyLoadedIvoryTower} since it doesn't synchronize the whole access method but * only the method internals on specific conditions. *

    * Yet another way to implement thread safe lazily initialized Singleton can be found in * {@link InitializingOnDemandHolderIdiom}. However, this implementation requires at least Java 8 * API level to work. */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point. * * @param args command line args */ public static void main(String[] args) { // eagerly initialized singleton IvoryTower ivoryTower1 = IvoryTower.getInstance(); IvoryTower ivoryTower2 = IvoryTower.getInstance(); LOGGER.info("ivoryTower1={}", ivoryTower1); LOGGER.info("ivoryTower2={}", ivoryTower2); // lazily initialized singleton ThreadSafeLazyLoadedIvoryTower threadSafeIvoryTower1 = ThreadSafeLazyLoadedIvoryTower.getInstance(); ThreadSafeLazyLoadedIvoryTower threadSafeIvoryTower2 = ThreadSafeLazyLoadedIvoryTower.getInstance(); LOGGER.info("threadSafeIvoryTower1={}", threadSafeIvoryTower1); LOGGER.info("threadSafeIvoryTower2={}", threadSafeIvoryTower2); // enum singleton EnumIvoryTower enumIvoryTower1 = EnumIvoryTower.INSTANCE; EnumIvoryTower enumIvoryTower2 = EnumIvoryTower.INSTANCE; LOGGER.info("enumIvoryTower1={}", enumIvoryTower1); LOGGER.info("enumIvoryTower2={}", enumIvoryTower2); // double checked locking ThreadSafeDoubleCheckLocking dcl1 = ThreadSafeDoubleCheckLocking.getInstance(); LOGGER.info(dcl1.toString()); ThreadSafeDoubleCheckLocking dcl2 = ThreadSafeDoubleCheckLocking.getInstance(); LOGGER.info(dcl2.toString()); // initialize on demand holder idiom InitializingOnDemandHolderIdiom demandHolderIdiom = InitializingOnDemandHolderIdiom.getInstance(); LOGGER.info(demandHolderIdiom.toString()); InitializingOnDemandHolderIdiom demandHolderIdiom2 = InitializingOnDemandHolderIdiom.getInstance(); LOGGER.info(demandHolderIdiom2.toString()); } } java-design-patterns-1.18.0/singleton/src/main/java/com/iluwatar/singleton/EnumIvoryTower.java000066400000000000000000000026321322244523500325230ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.singleton; /** * Enum based singleton implementation. Effective Java 2nd Edition (Joshua Bloch) p. 18 */ public enum EnumIvoryTower { INSTANCE; @Override public String toString() { return getDeclaringClass().getCanonicalName() + "@" + hashCode(); } } InitializingOnDemandHolderIdiom.java000066400000000000000000000044411322244523500356460ustar00rootroot00000000000000java-design-patterns-1.18.0/singleton/src/main/java/com/iluwatar/singleton/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.singleton; /** * The Initialize-on-demand-holder idiom is a secure way of creating a lazy initialized singleton * object in Java. *

    * The technique is as lazy as possible and works in all known versions of Java. It takes advantage * of language guarantees about class initialization, and will therefore work correctly in all * Java-compliant compilers and virtual machines. *

    * The inner class is referenced no earlier (and therefore loaded no earlier by the class loader) than * the moment that getInstance() is called. Thus, this solution is thread-safe without requiring special * language constructs (i.e. volatile or synchronized). * */ public final class InitializingOnDemandHolderIdiom { /** * Private constructor. */ private InitializingOnDemandHolderIdiom() {} /** * @return Singleton instance */ public static InitializingOnDemandHolderIdiom getInstance() { return HelperHolder.INSTANCE; } /** * Provides the lazy-loaded Singleton instance. */ private static class HelperHolder { private static final InitializingOnDemandHolderIdiom INSTANCE = new InitializingOnDemandHolderIdiom(); } } java-design-patterns-1.18.0/singleton/src/main/java/com/iluwatar/singleton/IvoryTower.java000066400000000000000000000033341322244523500316760ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.singleton; /** * Singleton class. Eagerly initialized static instance guarantees thread safety. */ public final class IvoryTower { /** * Private constructor so nobody can instantiate the class. */ private IvoryTower() {} /** * Static to class instance of the class. */ private static final IvoryTower INSTANCE = new IvoryTower(); /** * To be called by user to obtain instance of the class. * * @return instance of the singleton. */ public static IvoryTower getInstance() { return INSTANCE; } } ThreadSafeDoubleCheckLocking.java000066400000000000000000000060361322244523500350760ustar00rootroot00000000000000java-design-patterns-1.18.0/singleton/src/main/java/com/iluwatar/singleton/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.singleton; /** * Double check locking *

    * http://www.cs.umd.edu/~pugh/java/memoryModel/DoubleCheckedLocking.html *

    * Broken under Java 1.4. * * @author mortezaadi@gmail.com */ public final class ThreadSafeDoubleCheckLocking { private static volatile ThreadSafeDoubleCheckLocking instance; /** * private constructor to prevent client from instantiating. */ private ThreadSafeDoubleCheckLocking() { // to prevent instantiating by Reflection call if (instance != null) { throw new IllegalStateException("Already initialized."); } } /** * Public accessor. * * @return an instance of the class. */ public static ThreadSafeDoubleCheckLocking getInstance() { // local variable increases performance by 25 percent // Joshua Bloch "Effective Java, Second Edition", p. 283-284 ThreadSafeDoubleCheckLocking result = instance; // Check if singleton instance is initialized. If it is initialized then we can return the instance. if (result == null) { // It is not initialized but we cannot be sure because some other thread might have initialized it // in the meanwhile. So to make sure we need to lock on an object to get mutual exclusion. synchronized (ThreadSafeDoubleCheckLocking.class) { // Again assign the instance to local variable to check if it was initialized by some other thread // while current thread was blocked to enter the locked zone. If it was initialized then we can // return the previously created instance just like the previous null check. result = instance; if (result == null) { // The instance is still not initialized so we can safely (no other thread can enter this zone) // create an instance and make it our singleton instance. instance = result = new ThreadSafeDoubleCheckLocking(); } } } return result; } } ThreadSafeLazyLoadedIvoryTower.java000066400000000000000000000037411322244523500355210ustar00rootroot00000000000000java-design-patterns-1.18.0/singleton/src/main/java/com/iluwatar/singleton/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.singleton; /** * Thread-safe Singleton class. The instance is lazily initialized and thus needs synchronization * mechanism. * * Note: if created by reflection then a singleton will not be created but multiple options in the * same classloader */ public final class ThreadSafeLazyLoadedIvoryTower { private static ThreadSafeLazyLoadedIvoryTower instance; private ThreadSafeLazyLoadedIvoryTower() { // to prevent instantiating by Reflection call if (instance != null) { throw new IllegalStateException("Already initialized."); } } /** * The instance gets created only when it is called for first time. Lazy-loading */ public static synchronized ThreadSafeLazyLoadedIvoryTower getInstance() { if (instance == null) { instance = new ThreadSafeLazyLoadedIvoryTower(); } return instance; } } java-design-patterns-1.18.0/singleton/src/test/000077500000000000000000000000001322244523500214015ustar00rootroot00000000000000java-design-patterns-1.18.0/singleton/src/test/java/000077500000000000000000000000001322244523500223225ustar00rootroot00000000000000java-design-patterns-1.18.0/singleton/src/test/java/com/000077500000000000000000000000001322244523500231005ustar00rootroot00000000000000java-design-patterns-1.18.0/singleton/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500247305ustar00rootroot00000000000000java-design-patterns-1.18.0/singleton/src/test/java/com/iluwatar/singleton/000077500000000000000000000000001322244523500267325ustar00rootroot00000000000000java-design-patterns-1.18.0/singleton/src/test/java/com/iluwatar/singleton/AppTest.java000066400000000000000000000025121322244523500311550ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.singleton; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/singleton/src/test/java/com/iluwatar/singleton/EnumIvoryTowerTest.java000066400000000000000000000027261322244523500334220ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.singleton; /** * Date: 12/29/15 - 19:20 PM * * @author Jeroen Meulemeester */ public class EnumIvoryTowerTest extends SingletonTest { /** * Create a new singleton test instance using the given 'getInstance' method */ public EnumIvoryTowerTest() { super(() -> EnumIvoryTower.INSTANCE); } } InitializingOnDemandHolderIdiomTest.java000066400000000000000000000030271322244523500365400ustar00rootroot00000000000000java-design-patterns-1.18.0/singleton/src/test/java/com/iluwatar/singleton/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.singleton; /** * Date: 12/29/15 - 19:22 PM * * @author Jeroen Meulemeester */ public class InitializingOnDemandHolderIdiomTest extends SingletonTest { /** * Create a new singleton test instance using the given 'getInstance' method */ public InitializingOnDemandHolderIdiomTest() { super(InitializingOnDemandHolderIdiom::getInstance); } }java-design-patterns-1.18.0/singleton/src/test/java/com/iluwatar/singleton/IvoryTowerTest.java000066400000000000000000000027031322244523500325700ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.singleton; /** * Date: 12/29/15 - 19:23 PM * * @author Jeroen Meulemeester */ public class IvoryTowerTest extends SingletonTest { /** * Create a new singleton test instance using the given 'getInstance' method */ public IvoryTowerTest() { super(IvoryTower::getInstance); } }java-design-patterns-1.18.0/singleton/src/test/java/com/iluwatar/singleton/SingletonTest.java000066400000000000000000000101351322244523500323770ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.singleton; import org.junit.jupiter.api.Disabled; import org.junit.jupiter.api.Test; import java.util.ArrayList; import java.util.List; import java.util.concurrent.Callable; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.Future; import java.util.function.Supplier; import static java.time.Duration.ofMillis; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertSame; import static org.junit.jupiter.api.Assertions.assertTimeout; /** * This class provides several test case that test singleton construction. * * The first proves that multiple calls to the singleton getInstance object are the same when called * in the SAME thread. The second proves that multiple calls to the singleton getInstance object are * the same when called in the DIFFERENT thread. * * Date: 12/29/15 - 19:25 PM * @param Supplier method generating singletons * @author Jeroen Meulemeester * @author Richard Jones */ public abstract class SingletonTest { /** * The singleton's getInstance method */ private final Supplier singletonInstanceMethod; /** * Create a new singleton test instance using the given 'getInstance' method * * @param singletonInstanceMethod The singleton's getInstance method */ public SingletonTest(final Supplier singletonInstanceMethod) { this.singletonInstanceMethod = singletonInstanceMethod; } /** * Test the singleton in a non-concurrent setting */ @Test public void testMultipleCallsReturnTheSameObjectInSameThread() { // Create several instances in the same calling thread S instance1 = this.singletonInstanceMethod.get(); S instance2 = this.singletonInstanceMethod.get(); S instance3 = this.singletonInstanceMethod.get(); // now check they are equal assertSame(instance1, instance2); assertSame(instance1, instance3); assertSame(instance2, instance3); } /** * Test singleton instance in a concurrent setting */ @Test public void testMultipleCallsReturnTheSameObjectInDifferentThreads() throws Exception { assertTimeout(ofMillis(10000), () -> { // Create 10000 tasks and inside each callable instantiate the singleton class final List> tasks = new ArrayList<>(); for (int i = 0; i < 10000; i++) { tasks.add(this.singletonInstanceMethod::get); } // Use up to 8 concurrent threads to handle the tasks final ExecutorService executorService = Executors.newFixedThreadPool(8); final List> results = executorService.invokeAll(tasks); // wait for all of the threads to complete final S expectedInstance = this.singletonInstanceMethod.get(); for (Future res : results) { final S instance = res.get(); assertNotNull(instance); assertSame(expectedInstance, instance); } // tidy up the executor executorService.shutdown(); }); } } ThreadSafeDoubleCheckLockingTest.java000066400000000000000000000030131322244523500357610ustar00rootroot00000000000000java-design-patterns-1.18.0/singleton/src/test/java/com/iluwatar/singleton/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.singleton; /** * Date: 12/29/15 - 19:26 PM * * @author Jeroen Meulemeester */ public class ThreadSafeDoubleCheckLockingTest extends SingletonTest { /** * Create a new singleton test instance using the given 'getInstance' method */ public ThreadSafeDoubleCheckLockingTest() { super(ThreadSafeDoubleCheckLocking::getInstance); } }ThreadSafeLazyLoadedIvoryTowerTest.java000066400000000000000000000030241322244523500364060ustar00rootroot00000000000000java-design-patterns-1.18.0/singleton/src/test/java/com/iluwatar/singleton/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.singleton; /** * Date: 12/29/15 - 19:26 PM * * @author Jeroen Meulemeester */ public class ThreadSafeLazyLoadedIvoryTowerTest extends SingletonTest { /** * Create a new singleton test instance using the given 'getInstance' method */ public ThreadSafeLazyLoadedIvoryTowerTest() { super(ThreadSafeLazyLoadedIvoryTower::getInstance); } } java-design-patterns-1.18.0/specification/000077500000000000000000000000001322244523500204515ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/README.md000066400000000000000000000015461322244523500217360ustar00rootroot00000000000000--- layout: pattern title: Specification folder: specification permalink: /patterns/specification/ categories: Behavioral tags: - Java - Difficulty-Beginner --- ## Also known as Filter, Criteria ## Intent Specification pattern separates the statement of how to match a candidate, from the candidate object that it is matched against. As well as its usefulness in selection, it is also valuable for validation and for building to order ![alt text](./etc/specification.png "Specification") ## Applicability Use the Specification pattern when * you need to select a subset of objects based on some criteria, and to refresh the selection at various times * you need to check that only suitable objects are used for a certain role (validation) ## Related patterns * Repository ## Credits * [Martin Fowler - Specifications](http://martinfowler.com/apsupp/spec.pdf) java-design-patterns-1.18.0/specification/etc/000077500000000000000000000000001322244523500212245ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/etc/specification.png000066400000000000000000001404211322244523500245540ustar00rootroot00000000000000PNG  IHDR@~IDATx{}&ڰ`$f /`9Le4p8ȱ[2HC8x(Wè)1ДT$W3eC9zE~h($t b7@`Ou=OU}>4Ow~;>8V&@, `|]-嵲;`@ XpC@H.a KlA?``Q{Ț̙]kCE$Ca;a@ ̑LE$Ca;a@ ̑LE$Ca;a@ ̑LE$Ca;a@ ̑LEd:9̔X;6/-{yp{ꄺ X:X0Da -+"k vm~Ju+\\Y^ `HEF!,cB(,sEd58(j;3.;-;({/&0VQItkKa@PQ uja &;QXdJU\mllA%1>BDZu\XTN*-.2"`B}JUժh9E@kUY_̇X}Ai5]ۉ+`a&@(U)s3*žGEܢxpE,L.]CPo0"Na;a@PS tDa -PD`1D   Da -PD`1D   Da -PD`1D   Da -PD`1D   Da -PD2۽S)Ju+*D3P'@s$&%@hfw>=:}̓SQk۽=/Q=u,0GBj2QXd^xf{|v?~AX`ND [_o?~>+mSU9B3P'+`ɝf< F,aYDa -\k1}/<+pw׿M|jUmo,{o_[yao+lQ)w'>O\qO{O/~e Lܽ,+fa@Ñ4{h?rL=ïd {l ;{KFh~Gټ KlT1o5*ׅET,:?fc%ٖoD wן[+_=cl#% Þ:!/Kiv 򁲞|TTa]\;Q5Q Q0F1B;E4PXd wZ'׾׿{s=›_G} ,lE-JU0?+#A:ؓ];9[hQw?qŋ?Y_|>7K\ B毰iq "`:^ϯɉw3k!lfG +|7VMQʗQ4KF4(&h(,Dh ʶD h1[|iM?{>CSâ+yC:ŏ1i#7(a?E+=Go[c,߂%[3x&#lc#?Ks7u﮽vQW=}f[^r ÝvaB1߰{E2t҅SЯx }0=*½2+XJO1RWE.`ڿ^, [n,$Nj]mwhwļ>J./y <Vȏ@0zmP{o\yo]iwwHpՠ& r_*~ %] lrmaP)hВϨ>"I~/?Bs5-LZnw^~&kO_mO{3IUL=W-% Ĉ-3P'"`:K|GJia u$=І/Ba̋ک[z H{R~Z/pGs><]m<kD#4#e7@䁬Xi"?TF_Km޷0E|ϟ}a[?xhP+M Gُ(L!;4L/%<!Ya`0D.ֈfmx@ {~,;X$ w6]pOS)lWW)ʐQM.D=w[=6PX: };X]"?Οx{ǏA{Mw~yΘĚ>_]Tht.s(iά:atFU﩮K˟Ɍt> G;Ϋ|_ˋDF`IzԊ4%sb %5JYT|z? fjOQI<<"\j`XA{d.DE!e2+;LsyG*K]Vdž@䁬Xi"?o|gK?mGwүX8P.=|v E~pRAb.cFwF͐+J3 cݵaCgZ;l?yD_{rOwm1 `EӌR noPdJVxR3[ 4T5x6[ψy }2gd2+;Ls}GXT\j >S`X4-;>OS'mѝW61䑃2:zztE.0%7OP6 b]種~wqgT V44t(V8~7z#wQ !:* R~'y!UG4c,/w:۹|)w0|TX'e%f,NaHVbTB]mwskZG4*nh|&D~yrk7-޶ ;IM{JSJ3(+Dˡq-|CQĦW!TK+y_$^b J${9W3؂ϴ;~G`+Y{`{O2  B.VN3vPwSq£ Y2=%%V')ڏ>V Z X#)bɏQj-nLchӮGs|;k>rmϏuw3Ԍ3Z\%M3, d3k/IeJ:t!}E%t%dGm8WiSha}{{6}6ԫ!*XV/./TE y XfRwSPG'`in0y*wp\mw6B;M LNh >S6LQ5sVffՅQSts&c=Plv> [O>+K3J}Fv` {~N3,]# KGPTS'j: (j!/+mt̔>MG2jO8}2B##?AϴB=uBp `e#=OI -_i? 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.app; import java.util.Arrays; import java.util.List; import java.util.stream.Collectors; import com.iluwatar.specification.creature.Creature; import com.iluwatar.specification.creature.Dragon; import com.iluwatar.specification.creature.Goblin; import com.iluwatar.specification.creature.KillerBee; import com.iluwatar.specification.creature.Octopus; import com.iluwatar.specification.creature.Shark; import com.iluwatar.specification.creature.Troll; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.selector.ColorSelector; import com.iluwatar.specification.selector.MovementSelector; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * The central idea of the Specification pattern is to separate the statement of how to match a * candidate, from the candidate object that it is matched against. As well as its usefulness in * selection, it is also valuable for validation and for building to order. *

    * In this example we have a pool of creatures with different properties. We then have defined * separate selection rules (Specifications) that we apply to the collection and as output receive * only the creatures that match the selection criteria. *

    * http://martinfowler.com/apsupp/spec.pdf * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point */ public static void main(String[] args) { // initialize creatures list List creatures = Arrays.asList(new Goblin(), new Octopus(), new Dragon(), new Shark(), new Troll(), new KillerBee()); // find all walking creatures LOGGER.info("Find all walking creatures"); List walkingCreatures = creatures.stream().filter(new MovementSelector(Movement.WALKING)) .collect(Collectors.toList()); walkingCreatures.stream().forEach(c -> LOGGER.info(c.toString())); // find all dark creatures LOGGER.info("Find all dark creatures"); List darkCreatures = creatures.stream().filter(new ColorSelector(Color.DARK)).collect(Collectors.toList()); darkCreatures.stream().forEach(c -> LOGGER.info(c.toString())); // find all red and flying creatures LOGGER.info("Find all red and flying creatures"); List redAndFlyingCreatures = creatures.stream() .filter(new ColorSelector(Color.RED).and(new MovementSelector(Movement.FLYING))) .collect(Collectors.toList()); redAndFlyingCreatures.stream().forEach(c -> LOGGER.info(c.toString())); } } java-design-patterns-1.18.0/specification/src/main/java/com/iluwatar/specification/creature/000077500000000000000000000000001322244523500321455ustar00rootroot00000000000000AbstractCreature.java000066400000000000000000000041721322244523500361730ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/main/java/com/iluwatar/specification/creature/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.creature; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.property.Size; /** * * Base class for concrete creatures. * */ public abstract class AbstractCreature implements Creature { private String name; private Size size; private Movement movement; private Color color; /** * Constructor */ public AbstractCreature(String name, Size size, Movement movement, Color color) { this.name = name; this.size = size; this.movement = movement; this.color = color; } @Override public String toString() { return String.format("%s [size=%s, movement=%s, color=%s]", name, size, movement, color); } @Override public String getName() { return name; } @Override public Size getSize() { return size; } @Override public Movement getMovement() { return movement; } @Override public Color getColor() { return color; } } Creature.java000066400000000000000000000027341322244523500345110ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/main/java/com/iluwatar/specification/creature/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.creature; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.property.Size; /** * * Creature interface. * */ public interface Creature { String getName(); Size getSize(); Movement getMovement(); Color getColor(); } Dragon.java000066400000000000000000000027521322244523500341510ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/main/java/com/iluwatar/specification/creature/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.creature; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.property.Size; /** * * Dragon creature. * */ public class Dragon extends AbstractCreature { public Dragon() { super("Dragon", Size.LARGE, Movement.FLYING, Color.RED); } } Goblin.java000066400000000000000000000027551322244523500341540ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/main/java/com/iluwatar/specification/creature/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.creature; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.property.Size; /** * * Goblin creature. * */ public class Goblin extends AbstractCreature { public Goblin() { super("Goblin", Size.SMALL, Movement.WALKING, Color.GREEN); } } KillerBee.java000066400000000000000000000027701322244523500345750ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/main/java/com/iluwatar/specification/creature/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.creature; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.property.Size; /** * * KillerBee creature. * */ public class KillerBee extends AbstractCreature { public KillerBee() { super("KillerBee", Size.SMALL, Movement.FLYING, Color.LIGHT); } } Octopus.java000066400000000000000000000027621322244523500343740ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/main/java/com/iluwatar/specification/creature/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.creature; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.property.Size; /** * * Octopus creature. * */ public class Octopus extends AbstractCreature { public Octopus() { super("Octopus", Size.NORMAL, Movement.SWIMMING, Color.DARK); } } Shark.java000066400000000000000000000027531322244523500340100ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/main/java/com/iluwatar/specification/creature/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.creature; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.property.Size; /** * * Shark creature. * */ public class Shark extends AbstractCreature { public Shark() { super("Shark", Size.NORMAL, Movement.SWIMMING, Color.LIGHT); } } Troll.java000066400000000000000000000027501322244523500340310ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/main/java/com/iluwatar/specification/creature/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.creature; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.property.Size; /** * * Troll creature. * */ public class Troll extends AbstractCreature { public Troll() { super("Troll", Size.LARGE, Movement.WALKING, Color.DARK); } } java-design-patterns-1.18.0/specification/src/main/java/com/iluwatar/specification/property/000077500000000000000000000000001322244523500322175ustar00rootroot00000000000000Color.java000066400000000000000000000026521322244523500340660ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/main/java/com/iluwatar/specification/property/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.property; /** * * Color property. * */ public enum Color { DARK("dark"), LIGHT("light"), GREEN("green"), RED("red"); private String title; Color(String title) { this.title = title; } @Override public String toString() { return title; } } Movement.java000066400000000000000000000026651322244523500346060ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/main/java/com/iluwatar/specification/property/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.property; /** * * Movement property. * */ public enum Movement { WALKING("walking"), SWIMMING("swimming"), FLYING("flying"); private String title; Movement(String title) { this.title = title; } @Override public String toString() { return title; } } Size.java000066400000000000000000000026361322244523500337240ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/main/java/com/iluwatar/specification/property/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.property; /** * * Size property. * */ public enum Size { SMALL("small"), NORMAL("normal"), LARGE("large"); private String title; Size(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.18.0/specification/src/main/java/com/iluwatar/specification/selector/000077500000000000000000000000001322244523500321535ustar00rootroot00000000000000ColorSelector.java000066400000000000000000000030761322244523500355240ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/main/java/com/iluwatar/specification/selector/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.selector; import java.util.function.Predicate; import com.iluwatar.specification.creature.Creature; import com.iluwatar.specification.property.Color; /** * * Color selector. * */ public class ColorSelector implements Predicate { private final Color c; public ColorSelector(Color c) { this.c = c; } @Override public boolean test(Creature t) { return t.getColor().equals(c); } } MovementSelector.java000066400000000000000000000031231322244523500362310ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/main/java/com/iluwatar/specification/selector/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.selector; import java.util.function.Predicate; import com.iluwatar.specification.creature.Creature; import com.iluwatar.specification.property.Movement; /** * * Movement selector. * */ public class MovementSelector implements Predicate { private final Movement m; public MovementSelector(Movement m) { this.m = m; } @Override public boolean test(Creature t) { return t.getMovement().equals(m); } } SizeSelector.java000066400000000000000000000030671322244523500353600ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/main/java/com/iluwatar/specification/selector/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.selector; import java.util.function.Predicate; import com.iluwatar.specification.creature.Creature; import com.iluwatar.specification.property.Size; /** * * Size selector. * */ public class SizeSelector implements Predicate { private final Size s; public SizeSelector(Size s) { this.s = s; } @Override public boolean test(Creature t) { return t.getSize().equals(s); } } java-design-patterns-1.18.0/specification/src/test/000077500000000000000000000000001322244523500222175ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/test/java/000077500000000000000000000000001322244523500231405ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/test/java/com/000077500000000000000000000000001322244523500237165ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500255465ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/test/java/com/iluwatar/specification/000077500000000000000000000000001322244523500303665ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/test/java/com/iluwatar/specification/app/000077500000000000000000000000001322244523500311465ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/test/java/com/iluwatar/specification/app/AppTest.java000066400000000000000000000025221322244523500333720ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.app; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/specification/src/test/java/com/iluwatar/specification/creature/000077500000000000000000000000001322244523500322005ustar00rootroot00000000000000CreatureTest.java000066400000000000000000000073171322244523500354060ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/test/java/com/iluwatar/specification/creature/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.creature; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.property.Size; import org.junit.jupiter.params.ParameterizedTest; import org.junit.jupiter.params.provider.MethodSource; import java.util.Arrays; import java.util.Collection; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; /** * Date: 12/29/15 - 7:47 PM * * @author Jeroen Meulemeester */ public class CreatureTest { /** * @return The tested {@link Creature} instance and its expected specs */ public static Collection dataProvider() { return Arrays.asList( new Object[]{new Dragon(), "Dragon", Size.LARGE, Movement.FLYING, Color.RED}, new Object[]{new Goblin(), "Goblin", Size.SMALL, Movement.WALKING, Color.GREEN}, new Object[]{new KillerBee(), "KillerBee", Size.SMALL, Movement.FLYING, Color.LIGHT}, new Object[]{new Octopus(), "Octopus", Size.NORMAL, Movement.SWIMMING, Color.DARK}, new Object[]{new Shark(), "Shark", Size.NORMAL, Movement.SWIMMING, Color.LIGHT}, new Object[]{new Troll(), "Troll", Size.LARGE, Movement.WALKING, Color.DARK} ); } @ParameterizedTest @MethodSource("dataProvider") public void testGetName(Creature testedCreature, String name) throws Exception { assertEquals(name, testedCreature.getName()); } @ParameterizedTest @MethodSource("dataProvider") public void testGetSize(Creature testedCreature, String name, Size size) throws Exception { assertEquals(size, testedCreature.getSize()); } @ParameterizedTest @MethodSource("dataProvider") public void testGetMovement(Creature testedCreature, String name, Size size, Movement movement) throws Exception { assertEquals(movement, testedCreature.getMovement()); } @ParameterizedTest @MethodSource("dataProvider") public void testGetColor(Creature testedCreature, String name, Size size, Movement movement, Color color) throws Exception { assertEquals(color, testedCreature.getColor()); } @ParameterizedTest @MethodSource("dataProvider") public void testToString(Creature testedCreature, String name, Size size, Movement movement, Color color) throws Exception { final String toString = testedCreature.toString(); assertNotNull(toString); assertEquals( String.format("%s [size=%s, movement=%s, color=%s]", name, size, movement, color), toString ); } }java-design-patterns-1.18.0/specification/src/test/java/com/iluwatar/specification/selector/000077500000000000000000000000001322244523500322065ustar00rootroot00000000000000ColorSelectorTest.java000066400000000000000000000041501322244523500364110ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/test/java/com/iluwatar/specification/selector/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.selector; import com.iluwatar.specification.creature.Creature; import com.iluwatar.specification.property.Color; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertTrue; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.when; /** * Date: 12/29/15 - 7:35 PM * * @author Jeroen Meulemeester */ public class ColorSelectorTest { /** * Verify if the color selector gives the correct results */ @Test public void testColor() { final Creature greenCreature = mock(Creature.class); when(greenCreature.getColor()).thenReturn(Color.GREEN); final Creature redCreature = mock(Creature.class); when(redCreature.getColor()).thenReturn(Color.RED); final ColorSelector greenSelector = new ColorSelector(Color.GREEN); assertTrue(greenSelector.test(greenCreature)); assertFalse(greenSelector.test(redCreature)); } }MovementSelectorTest.java000066400000000000000000000042551322244523500371330ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/test/java/com/iluwatar/specification/selector/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.selector; import com.iluwatar.specification.creature.Creature; import com.iluwatar.specification.property.Movement; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertTrue; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.when; /** * Date: 12/29/15 - 7:37 PM * * @author Jeroen Meulemeester */ public class MovementSelectorTest { /** * Verify if the movement selector gives the correct results */ @Test public void testMovement() { final Creature swimmingCreature = mock(Creature.class); when(swimmingCreature.getMovement()).thenReturn(Movement.SWIMMING); final Creature flyingCreature = mock(Creature.class); when(flyingCreature.getMovement()).thenReturn(Movement.FLYING); final MovementSelector swimmingSelector = new MovementSelector(Movement.SWIMMING); assertTrue(swimmingSelector.test(swimmingCreature)); assertFalse(swimmingSelector.test(flyingCreature)); } }SizeSelectorTest.java000066400000000000000000000041611322244523500362470ustar00rootroot00000000000000java-design-patterns-1.18.0/specification/src/test/java/com/iluwatar/specification/selector/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.specification.selector; import com.iluwatar.specification.creature.Creature; import com.iluwatar.specification.property.Size; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertTrue; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.when; /** * Date: 12/29/15 - 7:43 PM * * @author Jeroen Meulemeester */ public class SizeSelectorTest { /** * Verify if the size selector gives the correct results */ @Test public void testMovement() { final Creature normalCreature = mock(Creature.class); when(normalCreature.getSize()).thenReturn(Size.NORMAL); final Creature smallCreature = mock(Creature.class); when(smallCreature.getSize()).thenReturn(Size.SMALL); final SizeSelector normalSelector = new SizeSelector(Size.NORMAL); assertTrue(normalSelector.test(normalCreature)); assertFalse(normalSelector.test(smallCreature)); } } java-design-patterns-1.18.0/state/000077500000000000000000000000001322244523500167515ustar00rootroot00000000000000java-design-patterns-1.18.0/state/README.md000066400000000000000000000031571322244523500202360ustar00rootroot00000000000000--- layout: pattern title: State folder: state permalink: /patterns/state/ categories: Behavioral tags: - Java - Difficulty-Intermediate - Gang Of Four --- ## Also known as Objects for States ## Intent Allow an object to alter its behavior when its internal state changes. The object will appear to change its class. ![alt text](./etc/state_1.png "State") ## Applicability Use the State pattern in either of the following cases * an object's behavior depends on its state, and it must change its behavior at run-time depending on that state * operations have large, multipart conditional statements that depend on the object's state. This state is usually represented by one or more enumerated constants. Often, several operations will contain this same conditional structure. The State pattern puts each branch of the conditional in a separate class. This lets you treat the object's state as an object in its own right that can vary independently from other objects. ## Real world examples * [javax.faces.lifecycle.Lifecycle#execute()](http://docs.oracle.com/javaee/7/api/javax/faces/lifecycle/Lifecycle.html#execute-javax.faces.context.FacesContext-) controlled by [FacesServlet](http://docs.oracle.com/javaee/7/api/javax/faces/webapp/FacesServlet.html), the behavior is dependent on current phase of lifecycle. * [JDiameter - Diameter State Machine](https://github.com/npathai/jdiameter/blob/master/core/jdiameter/api/src/main/java/org/jdiameter/api/app/State.java) ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) 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Q;U!L\9(YqgyߵkIϞه]_ލ{UJ4)aPU0 >#S'[ qzgϟдiC33iFT*Q2UL\9(͚?))X8e*S%Δ0 *`ZÑ]GЁ Nrqq-[>d*5e*S%Δ0 *`ZÑBVڵC6Vt:gV--wcG gLh S.(`nGŸ%ǰ23*%CrFU @oa0 *`0LS.(`H(ƞ`Ƀ\BQ$pb F<`0!$E`T^ ;-`F`Vۮ1IENDB`java-design-patterns-1.18.0/state/pom.xml000066400000000000000000000036421322244523500202730ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 state org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test java-design-patterns-1.18.0/state/src/000077500000000000000000000000001322244523500175405ustar00rootroot00000000000000java-design-patterns-1.18.0/state/src/main/000077500000000000000000000000001322244523500204645ustar00rootroot00000000000000java-design-patterns-1.18.0/state/src/main/java/000077500000000000000000000000001322244523500214055ustar00rootroot00000000000000java-design-patterns-1.18.0/state/src/main/java/com/000077500000000000000000000000001322244523500221635ustar00rootroot00000000000000java-design-patterns-1.18.0/state/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500240135ustar00rootroot00000000000000java-design-patterns-1.18.0/state/src/main/java/com/iluwatar/state/000077500000000000000000000000001322244523500251335ustar00rootroot00000000000000java-design-patterns-1.18.0/state/src/main/java/com/iluwatar/state/AngryState.java000066400000000000000000000032741322244523500300650ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.state; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Angry state. * */ public class AngryState implements State { private static final Logger LOGGER = LoggerFactory.getLogger(AngryState.class); private Mammoth mammoth; public AngryState(Mammoth mammoth) { this.mammoth = mammoth; } @Override public void observe() { LOGGER.info("{} is furious!", mammoth); } @Override public void onEnterState() { LOGGER.info("{} gets angry!", mammoth); } } java-design-patterns-1.18.0/state/src/main/java/com/iluwatar/state/App.java000066400000000000000000000035401322244523500265200ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.state; /** * * In State pattern the container object has an internal state object that defines the current * behavior. The state object can be changed to alter the behavior. *

    * This can be a cleaner way for an object to change its behavior at runtime without resorting to * large monolithic conditional statements and thus improves maintainability. *

    * In this example the {@link Mammoth} changes its behavior as time passes by. * */ public class App { /** * Program entry point */ public static void main(String[] args) { Mammoth mammoth = new Mammoth(); mammoth.observe(); mammoth.timePasses(); mammoth.observe(); mammoth.timePasses(); mammoth.observe(); } } java-design-patterns-1.18.0/state/src/main/java/com/iluwatar/state/Mammoth.java000066400000000000000000000035631322244523500274070ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.state; /** * * Mammoth has internal state that defines its behavior. * */ public class Mammoth { private State state; public Mammoth() { state = new PeacefulState(this); } /** * Makes time pass for the mammoth */ public void timePasses() { if (state.getClass().equals(PeacefulState.class)) { changeStateTo(new AngryState(this)); } else { changeStateTo(new PeacefulState(this)); } } private void changeStateTo(State newState) { this.state = newState; this.state.onEnterState(); } @Override public String toString() { return "The mammoth"; } public void observe() { this.state.observe(); } } java-design-patterns-1.18.0/state/src/main/java/com/iluwatar/state/PeacefulState.java000066400000000000000000000033221322244523500305230ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.state; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Peaceful state. * */ public class PeacefulState implements State { private static final Logger LOGGER = LoggerFactory.getLogger(PeacefulState.class); private Mammoth mammoth; public PeacefulState(Mammoth mammoth) { this.mammoth = mammoth; } @Override public void observe() { LOGGER.info("{} is calm and peaceful.", mammoth); } @Override public void onEnterState() { LOGGER.info("{} calms down.", mammoth); } } java-design-patterns-1.18.0/state/src/main/java/com/iluwatar/state/State.java000066400000000000000000000024451322244523500270630ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.state; /** * * State interface. * */ public interface State { void onEnterState(); void observe(); } java-design-patterns-1.18.0/state/src/test/000077500000000000000000000000001322244523500205175ustar00rootroot00000000000000java-design-patterns-1.18.0/state/src/test/java/000077500000000000000000000000001322244523500214405ustar00rootroot00000000000000java-design-patterns-1.18.0/state/src/test/java/com/000077500000000000000000000000001322244523500222165ustar00rootroot00000000000000java-design-patterns-1.18.0/state/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500240465ustar00rootroot00000000000000java-design-patterns-1.18.0/state/src/test/java/com/iluwatar/state/000077500000000000000000000000001322244523500251665ustar00rootroot00000000000000java-design-patterns-1.18.0/state/src/test/java/com/iluwatar/state/AppTest.java000066400000000000000000000025051322244523500274130ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.state; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/state/src/test/java/com/iluwatar/state/MammothTest.java000066400000000000000000000070621322244523500303000ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.state; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.slf4j.LoggerFactory; import java.util.LinkedList; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; /** * Date: 12/29/15 - 8:27 PM * * @author Jeroen Meulemeester */ public class MammothTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(); } @AfterEach public void tearDown() { appender.stop(); } /** * Switch to a complete mammoth 'mood'-cycle and verify if the observed mood matches the expected * value. */ @Test public void testTimePasses() { final Mammoth mammoth = new Mammoth(); mammoth.observe(); assertEquals("The mammoth is calm and peaceful.", appender.getLastMessage()); assertEquals(1 , appender.getLogSize()); mammoth.timePasses(); assertEquals("The mammoth gets angry!", appender.getLastMessage()); assertEquals(2 , appender.getLogSize()); mammoth.observe(); assertEquals("The mammoth is furious!", appender.getLastMessage()); assertEquals(3 , appender.getLogSize()); mammoth.timePasses(); assertEquals("The mammoth calms down.", appender.getLastMessage()); assertEquals(4 , appender.getLogSize()); mammoth.observe(); assertEquals("The mammoth is calm and peaceful.", appender.getLastMessage()); assertEquals(5 , appender.getLogSize()); } /** * Verify if {@link Mammoth#toString()} gives the expected value */ @Test public void testToString() { final String toString = new Mammoth().toString(); assertNotNull(toString); assertEquals("The mammoth", toString); } private class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender() { ((Logger) LoggerFactory.getLogger("root")).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public int getLogSize() { return log.size(); } public String getLastMessage() { return log.get(log.size() - 1).getFormattedMessage(); } } } java-design-patterns-1.18.0/step-builder/000077500000000000000000000000001322244523500202305ustar00rootroot00000000000000java-design-patterns-1.18.0/step-builder/README.md000066400000000000000000000017301322244523500215100ustar00rootroot00000000000000--- layout: pattern title: Step Builder folder: step-builder permalink: /patterns/step-builder/ categories: Creational tags: - Java - Difficulty-Intermediate --- ## Intent An extension of the Builder pattern that fully guides the user through the creation of the object with no chances of confusion. The user experience will be much more improved by the fact that he will only see the next step methods available, NO build method until is the right time to build the object. ![alt text](./etc/step-builder.png "Step Builder") ## Applicability Use the Step Builder pattern when the algorithm for creating a complex object should be independent of the parts that make up the object and how they're assembled the construction process must allow different representations for the object that's constructed when in the process of constructing the order is important. ## Credits * [Marco Castigliego - Step Builder](http://rdafbn.blogspot.co.uk/2012/07/step-builder-pattern_28.html) java-design-patterns-1.18.0/step-builder/etc/000077500000000000000000000000001322244523500210035ustar00rootroot00000000000000java-design-patterns-1.18.0/step-builder/etc/step-builder.png000066400000000000000000002244061322244523500241200ustar00rootroot00000000000000PNG  IHDRWj(IDATx] \OgPRDS)D%i"=PBʖ<$$QbQ1l8Ϧ1fmc{}R>}{9sνTQ@ ^U.@ @ ‹@ *o1O  JT~bI@ $$'AFB %BJA#PDV!xk&@*7*dq$'\3AVT01eΝMѼyð0OOرhђ_]Sj{L dDF2ReC?vEZbz>~ߥK9{\뉒 #*yxs"dʆ_'ڌt^1ϓCuТE!~Ȑ^N%#PXicc&Nוۼqc#Y)>˗w!Ν<)@zq|Vj@cAU޼~kܸ]w ~8C0 !q]5) SNNbACVR GfhTy֭"iSDH7W&NqY-k=G-Z411q ثW\۞99|Հbƃ/Lsr~8:WVVOzSW1!~]۩S3з/)#g)>~sFc蘙Yz{ 8m3g [nFpTA&M?%;;^xڮ ,,ڝ=ZRT4 D51*k`N?A;;ҥ}jĸ{:ѓ~]褮]Mc ic,>^Pzb8RęT1!Dwgk11޹sÇ;mm6rvX]0U5&`*Or*Zq#FR&INrd+9H Yk"O<7]FCe3 W?M57'*8"G=7y'ԆCu֝zOtdBr*қQY~Y3|݋0b$7 Tِ~:}Th2^;&(fpѣfմiZjv!+k"ϝKmQeOz,%/ձc+#(lI_~V_TVY11A%%faCݵ+yyI/q Uz-kl*#ˆA|PHFlG?0M>`;v"|%;>u.~ ի틏iaѮjժ99zjoڇl."#q]ۅ h2@9sƼmfaǎE ͒섄_}Aoq2.1"ē"#<~r\RGOR&0N>cb}a?t#J:m޹spѧO) ̬MuOL5kְ1?D#Z=cW?=^m[IZjiqvslagg\jƛo6!^^rΒ|̶<2nĉ (Ke|pT2;u릍re_{F?p`ԑ5j0%BuBFJO+VLkܸ~VM|}9K #L7WX3z0r m~K@A,bj'%=kZ%Ȅ5LOpq[jߏ&SaOYX{[;w.Z!{jժ9vm!}`GA8!a6ޢEcښS_I7c8n:,^?kౙG^cAcvH3_O?esI<،^vӴi9vT~''[f݂Ytk1Ay~:.'yʃ('v<)I~SwF'Ou9Kjњ[#͢F& mk22bLwj_߰Fԩ#֙~ұk&P1O~:o=hΛval?CBYʿwdX6-[6ai~\,˿\+'0j_|pGǸw6O߷xIv,~~EOa)#6& mW㹦ڵ]h^k׮=o{Uiv#^,`ňquSVx?qq8Jsv^ c֭=th 7~@ X!O`Դ%'$C> c«.5\3A ɫN9-5e ;o֎K# pߑW8G0L?1dۡC+uB#8\a1q;jݺPV=Z%GeIKQ8:x0np{ww{|mlX ڲe>Ww9]dK=hso32b͙36O@+(3T&)Ζ_ R.jjfX+ cTЫ~BMO_ҥS 5kfE<=Pat0 mj{NN"Ba>ƍ-,: р?^E@z>x`s4"K ?%g[jHmjjfB!|gϲ!fdd\|aDnܸDFF={ cOOOpRR]ZZqqq&&&᪈ccI&ZiXCdʆ^/CDk>?JpĈH zcC̊:z\ j|\sK^^‡J']0NIIvJc]BTw ܹs?> K.ܱ.,Ó_v^ (2gvaeF]صɮ׋G>DC*>jAIL4@0~5j*LH rb(P>I?)}T5fRW QE7do&[p)=} _~dOa.D䥕~R<5 kHXܮ]νti1yhnZhq<رc͛#F޽˱w}Lv5=x0?ku9ںcq }BC;v,j OOwąy8Ĥ@InJRm'!mº|œ\3AOr#pSRɓ۷m1G CΝ[7ei fؖ-ɳgSzde0 })(,¨qc8mcU''H%DBW1$(LJJ8DY$V~?ŔӪ/P<5 $7*# ,ܼyCM3}}5z2e:J-;ΜeiiBW}Վp-[滸&MrW0~~PN,iTf[wI 'T(U?q)5'm&Yv\ mqK7i? 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.stepbuilder; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Step Builder Pattern * *

    * Intent
    * An extension of the Builder pattern that fully guides the user through the creation of the object * with no chances of confusion.
    * The user experience will be much more improved by the fact that he will only see the next step * methods available, NO build method until is the right time to build the object. * *

    * Implementation *

      * The concept is simple: * *
    • Write creational steps inner classes or interfaces where each method knows what can be * displayed next.
      • * *
    • Implement all your steps interfaces in an inner static class.
      • * *
    • Last step is the BuildStep, in charge of creating the object you need to build.
      • *
    * *

    * Applicability
    * Use the Step Builder pattern when the algorithm for creating a complex object should be * independent of the parts that make up the object and how they're assembled the construction * process must allow different representations for the object that's constructed when in the * process of constructing the order is important. *

    * http://rdafbn.blogspot.co.uk/2012/07/step-builder-pattern_28.html */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args command line args */ public static void main(String[] args) { Character warrior = CharacterStepBuilder.newBuilder().name("Amberjill").fighterClass("Paladin") .withWeapon("Sword").noAbilities().build(); LOGGER.info(warrior.toString()); Character mage = CharacterStepBuilder.newBuilder().name("Riobard").wizardClass("Sorcerer") .withSpell("Fireball").withAbility("Fire Aura").withAbility("Teleport") .noMoreAbilities().build(); LOGGER.info(mage.toString()); Character thief = CharacterStepBuilder.newBuilder().name("Desmond").fighterClass("Rogue").noWeapon().build(); LOGGER.info(thief.toString()); } } java-design-patterns-1.18.0/step-builder/src/main/java/com/iluwatar/stepbuilder/Character.java000066400000000000000000000054411322244523500323570ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.stepbuilder; import java.util.List; /** * The class with many parameters. */ public class Character { private String name; private String fighterClass; private String wizardClass; private String weapon; private String spell; private List abilities; public Character(String name) { this.name = name; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getFighterClass() { return fighterClass; } public void setFighterClass(String fighterClass) { this.fighterClass = fighterClass; } public String getWizardClass() { return wizardClass; } public void setWizardClass(String wizardClass) { this.wizardClass = wizardClass; } public String getWeapon() { return weapon; } public void setWeapon(String weapon) { this.weapon = weapon; } public String getSpell() { return spell; } public void setSpell(String spell) { this.spell = spell; } public List getAbilities() { return abilities; } public void setAbilities(List abilities) { this.abilities = abilities; } @Override public String toString() { StringBuilder sb = new StringBuilder(); sb.append("This is a ") .append(fighterClass != null ? fighterClass : wizardClass) .append(" named ") .append(name) .append(" armed with a ") .append(weapon != null ? weapon : spell != null ? spell : "with nothing") .append(abilities != null ? " and wielding " + abilities + " abilities" : "") .append('.'); return sb.toString(); } } CharacterStepBuilder.java000066400000000000000000000112351322244523500344410ustar00rootroot00000000000000java-design-patterns-1.18.0/step-builder/src/main/java/com/iluwatar/stepbuilder/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.stepbuilder; import java.util.ArrayList; import java.util.List; /** * The Step Builder class. */ public final class CharacterStepBuilder { private CharacterStepBuilder() {} public static NameStep newBuilder() { return new CharacterSteps(); } /** * First Builder Step in charge of the Character name. Next Step available : ClassStep */ public interface NameStep { ClassStep name(String name); } /** * This step is in charge of setting the Character class (fighter or wizard). Fighter choice : * Next Step available : WeaponStep Wizard choice : Next Step available : SpellStep */ public interface ClassStep { WeaponStep fighterClass(String fighterClass); SpellStep wizardClass(String wizardClass); } /** * This step is in charge of the weapon. Weapon choice : Next Step available : AbilityStep No * weapon choice : Next Step available : BuildStep */ public interface WeaponStep { AbilityStep withWeapon(String weapon); BuildStep noWeapon(); } /** * This step is in charge of the spell. Spell choice : Next Step available : AbilityStep No spell * choice : Next Step available : BuildStep */ public interface SpellStep { AbilityStep withSpell(String spell); BuildStep noSpell(); } /** * This step is in charge of abilities. Next Step available : BuildStep */ public interface AbilityStep { AbilityStep withAbility(String ability); BuildStep noMoreAbilities(); BuildStep noAbilities(); } /** * This is the final step in charge of building the Character Object. Validation should be here. */ public interface BuildStep { Character build(); } /** * Step Builder implementation. */ private static class CharacterSteps implements NameStep, ClassStep, WeaponStep, SpellStep, AbilityStep, BuildStep { private String name; private String fighterClass; private String wizardClass; private String weapon; private String spell; private List abilities = new ArrayList<>(); @Override public ClassStep name(String name) { this.name = name; return this; } @Override public WeaponStep fighterClass(String fighterClass) { this.fighterClass = fighterClass; return this; } @Override public SpellStep wizardClass(String wizardClass) { this.wizardClass = wizardClass; return this; } @Override public AbilityStep withWeapon(String weapon) { this.weapon = weapon; return this; } @Override public BuildStep noWeapon() { return this; } @Override public AbilityStep withSpell(String spell) { this.spell = spell; return this; } @Override public BuildStep noSpell() { return this; } @Override public AbilityStep withAbility(String ability) { this.abilities.add(ability); return this; } @Override public BuildStep noMoreAbilities() { return this; } @Override public BuildStep noAbilities() { return this; } @Override public Character build() { Character character = new Character(name); if (fighterClass != null) { character.setFighterClass(fighterClass); } else { character.setWizardClass(wizardClass); } if (weapon != null) { character.setWeapon(weapon); } else { character.setSpell(spell); } if (!abilities.isEmpty()) { character.setAbilities(abilities); } return character; } } } java-design-patterns-1.18.0/step-builder/src/test/000077500000000000000000000000001322244523500217765ustar00rootroot00000000000000java-design-patterns-1.18.0/step-builder/src/test/java/000077500000000000000000000000001322244523500227175ustar00rootroot00000000000000java-design-patterns-1.18.0/step-builder/src/test/java/com/000077500000000000000000000000001322244523500234755ustar00rootroot00000000000000java-design-patterns-1.18.0/step-builder/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500253255ustar00rootroot00000000000000java-design-patterns-1.18.0/step-builder/src/test/java/com/iluwatar/stepbuilder/000077500000000000000000000000001322244523500276475ustar00rootroot00000000000000java-design-patterns-1.18.0/step-builder/src/test/java/com/iluwatar/stepbuilder/AppTest.java000066400000000000000000000025141322244523500320740ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.stepbuilder; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } CharacterStepBuilderTest.java000066400000000000000000000130401322244523500353300ustar00rootroot00000000000000java-design-patterns-1.18.0/step-builder/src/test/java/com/iluwatar/stepbuilder/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.stepbuilder; import org.junit.jupiter.api.Test; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertNull; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Date: 12/29/15 - 9:21 PM * * @author Jeroen Meulemeester */ public class CharacterStepBuilderTest { /** * Build a new wizard {@link Character} and verify if it has the expected attributes */ @Test public void testBuildWizard() { final Character character = CharacterStepBuilder.newBuilder() .name("Merlin") .wizardClass("alchemist") .withSpell("poison") .withAbility("invisibility") .withAbility("wisdom") .noMoreAbilities() .build(); assertEquals("Merlin", character.getName()); assertEquals("alchemist", character.getWizardClass()); assertEquals("poison", character.getSpell()); assertNotNull(character.toString()); final List abilities = character.getAbilities(); assertNotNull(abilities); assertEquals(2, abilities.size()); assertTrue(abilities.contains("invisibility")); assertTrue(abilities.contains("wisdom")); } /** * Build a new wizard {@link Character} without spell or abilities and verify if it has the * expected attributes */ @Test public void testBuildPoorWizard() { final Character character = CharacterStepBuilder.newBuilder() .name("Merlin") .wizardClass("alchemist") .noSpell() .build(); assertEquals("Merlin", character.getName()); assertEquals("alchemist", character.getWizardClass()); assertNull(character.getSpell()); assertNull(character.getAbilities()); assertNotNull(character.toString()); } /** * Build a new wizard {@link Character} and verify if it has the expected attributes */ @Test public void testBuildWeakWizard() { final Character character = CharacterStepBuilder.newBuilder() .name("Merlin") .wizardClass("alchemist") .withSpell("poison") .noAbilities() .build(); assertEquals("Merlin", character.getName()); assertEquals("alchemist", character.getWizardClass()); assertEquals("poison", character.getSpell()); assertNull(character.getAbilities()); assertNotNull(character.toString()); } /** * Build a new warrior {@link Character} and verify if it has the expected attributes */ @Test public void testBuildWarrior() { final Character character = CharacterStepBuilder.newBuilder() .name("Cuauhtemoc") .fighterClass("aztec") .withWeapon("spear") .withAbility("speed") .withAbility("strength") .noMoreAbilities() .build(); assertEquals("Cuauhtemoc", character.getName()); assertEquals("aztec", character.getFighterClass()); assertEquals("spear", character.getWeapon()); assertNotNull(character.toString()); final List abilities = character.getAbilities(); assertNotNull(abilities); assertEquals(2, abilities.size()); assertTrue(abilities.contains("speed")); assertTrue(abilities.contains("strength")); } /** * Build a new wizard {@link Character} without weapon and abilities and verify if it has the * expected attributes */ @Test public void testBuildPoorWarrior() { final Character character = CharacterStepBuilder.newBuilder() .name("Poor warrior") .fighterClass("none") .noWeapon() .build(); assertEquals("Poor warrior", character.getName()); assertEquals("none", character.getFighterClass()); assertNull(character.getWeapon()); assertNull(character.getAbilities()); assertNotNull(character.toString()); } /** * Build a new warrior {@link Character} without any abilities, but with a weapon and verify if it * has the expected attributes */ @Test public void testBuildWeakWarrior() { final Character character = CharacterStepBuilder.newBuilder() .name("Weak warrior") .fighterClass("none") .withWeapon("Slingshot") .noAbilities() .build(); assertEquals("Weak warrior", character.getName()); assertEquals("none", character.getFighterClass()); assertEquals("Slingshot", character.getWeapon()); assertNull(character.getAbilities()); assertNotNull(character.toString()); } }java-design-patterns-1.18.0/strategy/000077500000000000000000000000001322244523500174735ustar00rootroot00000000000000java-design-patterns-1.18.0/strategy/README.md000066400000000000000000000027411322244523500207560ustar00rootroot00000000000000--- layout: pattern title: Strategy folder: strategy permalink: /patterns/strategy/ categories: Behavioral tags: - Java - Difficulty-Beginner - Gang Of Four --- ## Also known as Policy ## Intent Define a family of algorithms, encapsulate each one, and make them interchangeable. Strategy lets the algorithm vary independently from clients that use it. ![alt text](./etc/strategy_1.png "Strategy") ## Applicability Use the Strategy pattern when * many related classes differ only in their behavior. Strategies provide a way to configure a class either one of many behaviors * you need different variants of an algorithm. for example, you might define algorithms reflecting different space/time trade-offs. Strategies can be used when these variants are implemented as a class hierarchy of algorithms * an algorithm uses data that clients shouldn't know about. Use the Strategy pattern to avoid exposing complex, algorithm-specific data structures * a class defines many behaviors, and these appear as multiple conditional statements in its operations. Instead of many conditionals, move related conditional branches into their own Strategy class ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) * [Functional Programming in Java: Harnessing the Power of Java 8 Lambda Expressions](http://www.amazon.com/Functional-Programming-Java-Harnessing-Expressions/dp/1937785467/ref=sr_1_1) java-design-patterns-1.18.0/strategy/etc/000077500000000000000000000000001322244523500202465ustar00rootroot00000000000000java-design-patterns-1.18.0/strategy/etc/strategy.png000066400000000000000000000360411322244523500226220ustar00rootroot00000000000000PNG  IHDR-|;IDATx}ml-yF~ ׬4*D݆L XqmKPEBD)W Q|$ݰVyȦU|lJe*sk[}TE 1@GĖE&h{]ō?9;1sٝy< svg}ggfgcugS@ԃT\.X.7TIJ`0r ]pbD,{Ha!+ "=$tX3`076e L"" bCB5fs`3XÕV/1:cP}lx0+2o{{2;~bp׊L`Wxen͏ewѫa \@>lﰼ h fxWpo02ܻWb2@2m\)3LƅĝL&;6RBck +\3o{,aeTâ+PĨqAImFhde*lYvF'Q,ꝥҙ`WΘ7½s"]ew"FӵDu؛ږlz4LyXSwЍ`Wn7½M)eny{MD<4L0'7lLB{b^ጹ}#;g?(ҥX{/btkƇn'v3SiW 7ޓwó;-*R0+F fJc0V%;h` a0uiNqMVy֐IN;>r07½|:prna7 !Zuit'W9`Wܾ 68fFI \"=$tX3`076e L"" bCB5fs`3Xa$+ "=$tX3`076e L"" bC߸گ,yM~L^䕹"|2J3 1)J3ב|ty*kM lÝܒ0q|8ge!EM,[! ^ΕΤ:R]:ywko_'v>›DUhJ0 1 3Ko֗5-s]+Fƃy//.Zrs{jHktiU,ՌKʝ:].䁉{'D_K^J4W_##'PɹELå8ጕo׊{0E%_:I+lnXdq4$njX;!l3+ԫb:dMn>mOӣ/Ο.ˇ/dM谏r-xIr_|Go; ?m$40M~LnHȝJȗwr+ù-םCZegl[MmImkeEiIfZӴ_+lnX[SX(W_Lyq_%EyoiO,Չm`;\PnZ>|溙?ګ]W?>? 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.strategy; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * The Strategy pattern (also known as the policy pattern) is a software design pattern that enables * an algorithm's behavior to be selected at runtime. *

    * Before Java 8 the Strategies needed to be separate classes forcing the developer * to write lots of boilerplate code. With modern Java it is easy to pass behavior * with method references and lambdas making the code shorter and more readable. *

    * In this example ({@link DragonSlayingStrategy}) encapsulates an algorithm. The containing object * ({@link DragonSlayer}) can alter its behavior by changing its strategy. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args command line args */ public static void main(String[] args) { // GoF Strategy pattern LOGGER.info("Green dragon spotted ahead!"); DragonSlayer dragonSlayer = new DragonSlayer(new MeleeStrategy()); dragonSlayer.goToBattle(); LOGGER.info("Red dragon emerges."); dragonSlayer.changeStrategy(new ProjectileStrategy()); dragonSlayer.goToBattle(); LOGGER.info("Black dragon lands before you."); dragonSlayer.changeStrategy(new SpellStrategy()); dragonSlayer.goToBattle(); // Java 8 Strategy pattern LOGGER.info("Green dragon spotted ahead!"); dragonSlayer = new DragonSlayer( () -> LOGGER.info("With your Excalibur you severe the dragon's head!")); dragonSlayer.goToBattle(); LOGGER.info("Red dragon emerges."); dragonSlayer.changeStrategy(() -> LOGGER.info( "You shoot the dragon with the magical crossbow and it falls dead on the ground!")); dragonSlayer.goToBattle(); LOGGER.info("Black dragon lands before you."); dragonSlayer.changeStrategy(() -> LOGGER.info( "You cast the spell of disintegration and the dragon vaporizes in a pile of dust!")); dragonSlayer.goToBattle(); } } java-design-patterns-1.18.0/strategy/src/main/java/com/iluwatar/strategy/DragonSlayer.java000066400000000000000000000031241322244523500316340ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.strategy; /** * * DragonSlayer uses different strategies to slay the dragon. * */ public class DragonSlayer { private DragonSlayingStrategy strategy; public DragonSlayer(DragonSlayingStrategy strategy) { this.strategy = strategy; } public void changeStrategy(DragonSlayingStrategy strategy) { this.strategy = strategy; } public void goToBattle() { strategy.execute(); } } java-design-patterns-1.18.0/strategy/src/main/java/com/iluwatar/strategy/DragonSlayingStrategy.java000066400000000000000000000024671322244523500335370ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.strategy; /** * * Strategy interface. * */ @FunctionalInterface public interface DragonSlayingStrategy { void execute(); } java-design-patterns-1.18.0/strategy/src/main/java/com/iluwatar/strategy/MeleeStrategy.java000066400000000000000000000030441322244523500320150ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.strategy; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Melee strategy. * */ public class MeleeStrategy implements DragonSlayingStrategy { private static final Logger LOGGER = LoggerFactory.getLogger(MeleeStrategy.class); @Override public void execute() { LOGGER.info("With your Excalibur you sever the dragon's head!"); } } java-design-patterns-1.18.0/strategy/src/main/java/com/iluwatar/strategy/ProjectileStrategy.java000066400000000000000000000031221322244523500330630ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.strategy; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Projectile strategy. * */ public class ProjectileStrategy implements DragonSlayingStrategy { private static final Logger LOGGER = LoggerFactory.getLogger(ProjectileStrategy.class); @Override public void execute() { LOGGER.info("You shoot the dragon with the magical crossbow and it falls dead on the ground!"); } } java-design-patterns-1.18.0/strategy/src/main/java/com/iluwatar/strategy/SpellStrategy.java000066400000000000000000000031061322244523500320440ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.strategy; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Spell strategy. * */ public class SpellStrategy implements DragonSlayingStrategy { private static final Logger LOGGER = LoggerFactory.getLogger(SpellStrategy.class); @Override public void execute() { LOGGER.info("You cast the spell of disintegration and the dragon vaporizes in a pile of dust!"); } } java-design-patterns-1.18.0/strategy/src/test/000077500000000000000000000000001322244523500212415ustar00rootroot00000000000000java-design-patterns-1.18.0/strategy/src/test/java/000077500000000000000000000000001322244523500221625ustar00rootroot00000000000000java-design-patterns-1.18.0/strategy/src/test/java/com/000077500000000000000000000000001322244523500227405ustar00rootroot00000000000000java-design-patterns-1.18.0/strategy/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500245705ustar00rootroot00000000000000java-design-patterns-1.18.0/strategy/src/test/java/com/iluwatar/strategy/000077500000000000000000000000001322244523500264325ustar00rootroot00000000000000java-design-patterns-1.18.0/strategy/src/test/java/com/iluwatar/strategy/AppTest.java000066400000000000000000000025111322244523500306540ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.strategy; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/strategy/src/test/java/com/iluwatar/strategy/DragonSlayerTest.java000066400000000000000000000046731322244523500325410ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.strategy; import org.junit.jupiter.api.Test; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/29/15 - 10:50 PM * * @author Jeroen Meulemeester */ public class DragonSlayerTest { /** * Verify if the dragon slayer uses the strategy during battle */ @Test public void testGoToBattle() { final DragonSlayingStrategy strategy = mock(DragonSlayingStrategy.class); final DragonSlayer dragonSlayer = new DragonSlayer(strategy); dragonSlayer.goToBattle(); verify(strategy).execute(); verifyNoMoreInteractions(strategy); } /** * Verify if the dragon slayer uses the new strategy during battle after a change of strategy */ @Test public void testChangeStrategy() throws Exception { final DragonSlayingStrategy initialStrategy = mock(DragonSlayingStrategy.class); final DragonSlayer dragonSlayer = new DragonSlayer(initialStrategy); dragonSlayer.goToBattle(); verify(initialStrategy).execute(); final DragonSlayingStrategy newStrategy = mock(DragonSlayingStrategy.class); dragonSlayer.changeStrategy(newStrategy); dragonSlayer.goToBattle(); verify(newStrategy).execute(); verifyNoMoreInteractions(initialStrategy, newStrategy); } }DragonSlayingStrategyTest.java000066400000000000000000000066111322244523500343460ustar00rootroot00000000000000java-design-patterns-1.18.0/strategy/src/test/java/com/iluwatar/strategy/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.strategy; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.params.ParameterizedTest; import org.junit.jupiter.params.provider.MethodSource; import org.slf4j.LoggerFactory; import java.util.Arrays; import java.util.Collection; import java.util.LinkedList; import java.util.List; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Date: 12/29/15 - 10:58 PM * * @author Jeroen Meulemeester */ public class DragonSlayingStrategyTest { /** * @return The test parameters for each cycle */ static Collection dataProvider() { return Arrays.asList( new Object[]{ new MeleeStrategy(), "With your Excalibur you sever the dragon's head!" }, new Object[]{ new ProjectileStrategy(), "You shoot the dragon with the magical crossbow and it falls dead on the ground!" }, new Object[]{ new SpellStrategy(), "You cast the spell of disintegration and the dragon vaporizes in a pile of dust!" } ); } private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(); } @AfterEach public void tearDown() { appender.stop(); } /** * Test if executing the strategy gives the correct response */ @ParameterizedTest @MethodSource("dataProvider") public void testExecute(DragonSlayingStrategy strategy, String expectedResult) { strategy.execute(); assertEquals(expectedResult, appender.getLastMessage()); assertEquals(1, appender.getLogSize()); } private class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender() { ((Logger) LoggerFactory.getLogger("root")).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public int getLogSize() { return log.size(); } public String getLastMessage() { return log.get(log.size() - 1).getFormattedMessage(); } } } java-design-patterns-1.18.0/template-method/000077500000000000000000000000001322244523500207225ustar00rootroot00000000000000java-design-patterns-1.18.0/template-method/README.md000066400000000000000000000025731322244523500222100ustar00rootroot00000000000000--- layout: pattern title: Template method folder: template-method permalink: /patterns/template-method/ categories: Behavioral tags: - Java - Difficulty-Beginner - Gang Of Four --- ## Intent Define the skeleton of an algorithm in an operation, deferring some steps to subclasses. Template method lets subclasses redefine certain steps of an algorithm without changing the algorithm's structure. ![alt text](./etc/template-method_1.png "Template Method") ## Applicability The Template Method pattern should be used * to implement the invariant parts of an algorithm once and leave it up to subclasses to implement the behavior that can vary * when common behavior among subclasses should be factored and localized in a common class to avoid code duplication. This is good example of "refactoring to generalize" as described by Opdyke and Johnson. You first identify the differences in the existing code and then separate the differences into new operations. Finally, you replace the differing code with a template method that calls one of these new operations * to control subclasses extensions. You can define a template method that calls "hook" operations at specific points, thereby permitting extensions only at those points ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.18.0/template-method/etc/000077500000000000000000000000001322244523500214755ustar00rootroot00000000000000java-design-patterns-1.18.0/template-method/etc/template-method.png000066400000000000000000000427671322244523500253140ustar00rootroot00000000000000PNG  IHDR 5EIDATx}m}HT?T*]D R*m쨒AMk "mBġD倝ޮkzMjbʵNK`G)Q#&n"Z%_-?g_󺳻svg<]흳;3;ggfg~x^P<9ܟ`vR @;vyKS<%)p@8 O W8S VЬ8 O hGx|O 䎐KHϷ'VNs[7w:e)=tx m"橣@xl;ylWrh+]*:՗"y2~橣@^7~s G˻;eǟ;Sp+l%O>SyiԤ<Ƴ(Tc:0i)5mmۺV^ٌ=ebj[yY.i,(Hy*|SG<^g}[ݰ;kffo<KT 6C<Sk>u|d+<]B .!OvyKS<%)p@8:,OC2w6u8b'kty 'jiBSQ4+O:t=3u|-x0(ZcRm&!i,x$UWYv%dr=F9XU$({R$0*S Q4(OD)Ru 'I6^[AYܛ%+D/(K|=ogVBvDG1Zʫ8K|R|`k!O9yRjFa_d7wb)H3Cs%j ,v&D)=,9SRݠJxh 橣hg){SUy"D#MiFF(*njLDmX.{J_nЪ4hܙsX)EUtP Ӿ_a&BGYy"o8jɓ񶂼6%STEd&r틗{PuMnVHB,.2$kty :wIr^B U"TiV^'-ΝF3ɖl:)O-UHS0'|ƫxeyӔ0Tj 7MՔ< Z!)p|?|_ؿ:Ӑhs!gJey+0p89fRM)OiҊ GhfF'w*BWӬrޗXӈgJ|CN{GpPʃ_s(DSmc⍫N[Jw;M.!9v/]=>ڷ)pcwk Gٿ,P'Νu܁׳ J-Ojro_EX45{{﫰XUb iBN>w]o"Y` yVIarN|ƞ4 .Wᕬki}wJ/[ޗXM3yQiǮ;xǞ/9%vp݁h+Ou]dH'<g™X",e)mBYWa|T>橣g̗g׏a_<*'Oƞ +')~LG5"S OJd+ؓC Oxb;P`sE'< 9<#rk ;A=ŗ;ީجS>_+4"Uy(%XOVEm'E'kD)kNNc:nS:#vCP WPy ]' y '<]B .!Ov<+g54*yx5MSp/Oj](utSP<<2팦e݇V~ɜS,SSɓL!Alpq˝Py/AO</N *b c=ےOY*KkL))pms*?mT\9<v1!@ql))px'O؃7|,ՆܜB<]B .!Oc͚K{M0m)y|BY .\XfM۹ gϞ]~}۹ FyΝ; Oشi O;|۹ \rŋ O@x֮]v.yɓ'~۹ h۾}{۹ hLB ;@zvv.y`5^e Uk׮} 'T O/^KhbS%<E;iː4Pl((;!?Uܪ OǏߴiSzAziBiD"'Q\Ua$-QTe,//ܹ3=/飑= ,@f ~ZzD,,,>|X̑<)  DRcNIPcfY~ٳg!OiPd{QӚ5k.\ Fy O32JÅFcOrC{iP(Oc-W;ܥP\Xy 'MH.i iPm.)\@6'M8` hp1y\@'58` h۶mzsp1yTG]3b^yI]c 4>.3yFA%s1~x4G4Xb@vx`0[yZm>O|@p'?vFyr?@ fmdyrf9P (Ag<@ : <J O %>Py)!Otb7?rg򞐧@ :i<l+ 3x#Oǣ})-J᪻W[%>PG']ƔD XR!OJZ']שK>!хẸus˓2W8b o@ :C[Olh"7^.Ccܩ#[=Q/$e tn=Jgchn8EJ{ #iHQBG14K@ :.I-RG"ptҳӝC80&]jVv2_f (AgF(EW1-+Py!>Py)!OtH y3@@JS}RB% +ۯ@ :Ô7~n~jcַP\67,x7_/GSgy"f&y'(qE+2:i}lq~J]"3^7JS}<>k7}؎3??-$b]\HભJ#;z\K m/Djɥͅ<J~瑯>8?;䙽'zq7c%Ҹ/bقx]D6݋/4(Agp+O~Ͼ,_~³_&̎D4%4ݕpi!' _++$Xg~HQ LJbqu0/ PVu~W?0kn6ڥ%yI[2+ӥ4P&mDW(0ϊ r&{)6{'_t_-ߺ2o۰7pĖoط#\?ɍ`كRTc鰱|ܣZҟe)Tw+PЄU@VdEȶPeIBv;[nĜj)*J.IF,@ :BWJVvwb)+%y6U%wCk.h)ۙSZ=,9SRݠJx8/Q% jys0H)E$ iD!@_(,o/\&S*xII Ӿ_aW$p<J:'>PP[R/1 .&r`QȹK6[7th_nT(AgٹlCa_UήߑH{:}<Jt_.bhfSSG&-ԓU:(C<J tqg_r]|i.u>퍲:hS#Weor\Lb8[p{=U*o-2?Wmw!Ot<nٿ,P:dKuJܮ6ݖ wR {O==/KF]hkvٝp<$_6ykP0%y2VWU~_P ԤرPpGewT(Agg^hGtFH k&k3z:B% tfx8o4uwE55ߚE/y璌*ES},Oa͋s]q;sd[!]ܫvi^"Eqg "/u%~:l=;YIhf7J1cPf+B% y:}O&'OR>'_UڸbgKϸꝮD..ROU8Rido.U@$) /RBT{q4Y@ :NN=}wO\{6@⊄Lk}V a䝂J{jHe><4ʬ-Fi% :yz=O_=ibU.m޾#i(*ZR5②+~j4Ȝ VƦ&KyCvjbyP`[^wW2[#rƕ6 +d-'LRՊU &GZ$ޭ1.PUy3Ɵ_DMv5^,o\>Tܸ8%sҏǛDw+zLIpeTBf^$*eV#>PP8Ȩ)]6]:o"5F,Y@P)K{y|R Y@ :C<n̐[*7@ :C yR4Lu hL)*gaB% 5Ƀj-ݎ&Uj<Jty3@@JS}Gƽ6ekD9y3i\-SSrVt nD9 =܃e^!vِSMId) c@ :YFoiF@7|Ⱦs6{@Aтͱ؅SMKOa̢U ONtByVtLt y3̲Py)!OtH y3"OӒdoOfu!!OtY/VM<T(Ag0'|ƫlM;h7J$ Q}Gdi 2*|PyGTh{U[B% :yw=x?eҙYߍh8y=/>P&jyJMJjGr ˝xB/+B_L#]NT.?\D 4mYӜT(AgPq9<J'2cMf y3)O`[<J O %>Py)!Ot5k.@ fmdy ʶs6lmS8'?m;#annFQy?~׾qƶ,//p n;/@E@}mڴ… ;vؾ}{dX\xqaa%Q@:m۶eUB4(N,ey{=VӄAK.]v#&n1={ձ~ꪶ-XuhS+%VR5H6A}38y$l/={vms^VzJѣm K`Uk~~~ D;w=rȥ^B0 @&Osss*)?1)YokaͶX%ж@cUN|d'ޜs O{]5O>/0`B< Tf׀y%^.#MZIΉ۹A(Oxw5 X ,p<l1999 GhRbRP,8Ubpx<)рW44uN"ãϺaE*# w "#"b[̒ EI8 &O y% K% l'PK.!O']B@-!O`{O-|7ݴvvBZ/s ӮO1/83&;v-,\y([2M-`fb,8#X鹶9v$ZvKJ`[Q\ѬnKS4?be@̵ybްt|'O#gyģWw7ΡΝe( DߑLwdq`HRH&]©HjǓTV#TҨ);yDI0?5SfFӫ9m kW˷8R6,ob|c/?emZOYhHfP<~"G\ޙi۞>,.D2ɼ:wTJ'ڋI<!Zlى!P̵װ<}l}xGzg?ym}qxm+ ے6N'ҍ=Ϗ9]jkyb#TҨSa7j%&>7{#WS͵+w~?|'K{Oo9}PlRy" '%ŧܙe> ɇytZ$-њg]JUh!UjybUQ( I%n}9Ҋ7"tM0QO<҅w0@"@̵׊<g}[ˣci ?;'O``%@vo<@u5uyP:O6NTF94(( u ˓͖$)Hzsg-'.6mb蓲ʙ~5aXx; 27<8HQJu*s.O@< ;pE݆kH!rP<~RBW)m*(]UX'%e m {ZPDbUi q^j)JWYU0CG\Rc֊*~hˇ̪r&RƟ% e~Q`^ڹ?)OXع :'ے;hEn:3Qb0f}<Jy3VTtqAF1q{lbEsȓ6 #{$OWmѣˢCy@0PO#W|j&Cَ Vaz ,=ڮgv'f@}N_CտpFy\fRq+gUiaʫ. 6λKm29ⓥ{mJ4I&ʘVc-X>w]o"Y`A2YYSֿp'ŝY^%9Wq4ZXZE/THMce|*c.+O[=v;xiϩO-,@4Isk=O֓"v۫,Q!O5Qʓ|}ͷ1:G<% 𞛞#+Cǒ&$:-tw쵣lR!Sh@W)Gèe?&5i?d0"1M,oǟuفр@Jz6җ4grzWvWxC6Nj40>B|sZh#OhW\l#7E&Hf_́1cz5U!'pzʘ!OND[<$=2fȓ˔Bi:!OJj y% K% l'PK.!O']6%O9ɩ"iFkZx,; AzzϝRк<#+әUѲqX̔ջ h@Xบ˓)fI%O7sX=c*<eG5!rV# 9 yag 'PK.!O']B@-!O`Ů̳<g= :l&K8TYf@nOvf*B&,'c]Wdi! 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.templatemethod; /** * * Template Method defines a skeleton for an algorithm. The algorithm subclasses provide * implementation for the blank parts. *

    * In this example {@link HalflingThief} contains {@link StealingMethod} that can be changed. First * the thief hits with {@link HitAndRunMethod} and then with {@link SubtleMethod}. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { HalflingThief thief = new HalflingThief(new HitAndRunMethod()); thief.steal(); thief.changeMethod(new SubtleMethod()); thief.steal(); } } HalflingThief.java000066400000000000000000000027731322244523500343010ustar00rootroot00000000000000java-design-patterns-1.18.0/template-method/src/main/java/com/iluwatar/templatemethod/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.templatemethod; /** * * Halfling thief uses {@link StealingMethod} to steal. * */ public class HalflingThief { private StealingMethod method; public HalflingThief(StealingMethod method) { this.method = method; } public void steal() { method.steal(); } public void changeMethod(StealingMethod method) { this.method = method; } } HitAndRunMethod.java000066400000000000000000000033711322244523500345650ustar00rootroot00000000000000java-design-patterns-1.18.0/template-method/src/main/java/com/iluwatar/templatemethod/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.templatemethod; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * HitAndRunMethod implementation of {@link StealingMethod}. * */ public class HitAndRunMethod extends StealingMethod { private static final Logger LOGGER = LoggerFactory.getLogger(HitAndRunMethod.class); @Override protected String pickTarget() { return "old goblin woman"; } @Override protected void confuseTarget(String target) { LOGGER.info("Approach the {} from behind.", target); } @Override protected void stealTheItem(String target) { LOGGER.info("Grab the handbag and run away fast!"); } } StealingMethod.java000066400000000000000000000034701322244523500344770ustar00rootroot00000000000000java-design-patterns-1.18.0/template-method/src/main/java/com/iluwatar/templatemethod/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.templatemethod; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * StealingMethod defines skeleton for the algorithm. * */ public abstract class StealingMethod { private static final Logger LOGGER = LoggerFactory.getLogger(StealingMethod.class); protected abstract String pickTarget(); protected abstract void confuseTarget(String target); protected abstract void stealTheItem(String target); /** * Steal */ public void steal() { String target = pickTarget(); LOGGER.info("The target has been chosen as {}.", target); confuseTarget(target); stealTheItem(target); } } SubtleMethod.java000066400000000000000000000034171322244523500341700ustar00rootroot00000000000000java-design-patterns-1.18.0/template-method/src/main/java/com/iluwatar/templatemethod/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.templatemethod; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * SubtleMethod implementation of {@link StealingMethod}. * */ public class SubtleMethod extends StealingMethod { private static final Logger LOGGER = LoggerFactory.getLogger(SubtleMethod.class); @Override protected String pickTarget() { return "shop keeper"; } @Override protected void confuseTarget(String target) { LOGGER.info("Approach the {} with tears running and hug him!", target); } @Override protected void stealTheItem(String target) { LOGGER.info("While in close contact grab the {}'s wallet.", target); } } java-design-patterns-1.18.0/template-method/src/test/000077500000000000000000000000001322244523500224705ustar00rootroot00000000000000java-design-patterns-1.18.0/template-method/src/test/java/000077500000000000000000000000001322244523500234115ustar00rootroot00000000000000java-design-patterns-1.18.0/template-method/src/test/java/com/000077500000000000000000000000001322244523500241675ustar00rootroot00000000000000java-design-patterns-1.18.0/template-method/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500260175ustar00rootroot00000000000000java-design-patterns-1.18.0/template-method/src/test/java/com/iluwatar/templatemethod/000077500000000000000000000000001322244523500310335ustar00rootroot00000000000000java-design-patterns-1.18.0/template-method/src/test/java/com/iluwatar/templatemethod/AppTest.java000066400000000000000000000025171322244523500332630ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.templatemethod; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } HalflingThiefTest.java000066400000000000000000000044501322244523500351660ustar00rootroot00000000000000java-design-patterns-1.18.0/template-method/src/test/java/com/iluwatar/templatemethod/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.templatemethod; import org.junit.jupiter.api.Test; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/29/15 - 18:15 PM * * @author Jeroen Meulemeester */ public class HalflingThiefTest { /** * Verify if the thief uses the provided stealing method */ @Test public void testSteal() { final StealingMethod method = mock(StealingMethod.class); final HalflingThief thief = new HalflingThief(method); thief.steal(); verify(method).steal(); verifyNoMoreInteractions(method); } /** * Verify if the thief uses the provided stealing method, and the new method after changing it */ @Test public void testChangeMethod() { final StealingMethod initialMethod = mock(StealingMethod.class); final HalflingThief thief = new HalflingThief(initialMethod); thief.steal(); verify(initialMethod).steal(); final StealingMethod newMethod = mock(StealingMethod.class); thief.changeMethod(newMethod); thief.steal(); verify(newMethod).steal(); verifyNoMoreInteractions(initialMethod, newMethod); } }HitAndRunMethodTest.java000066400000000000000000000032141322244523500354540ustar00rootroot00000000000000java-design-patterns-1.18.0/template-method/src/test/java/com/iluwatar/templatemethod/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.templatemethod; /** * Date: 12/30/15 - 18:12 PM * * @author Jeroen Meulemeester */ public class HitAndRunMethodTest extends StealingMethodTest { /** * Create a new test for the {@link HitAndRunMethod} */ public HitAndRunMethodTest() { super( new HitAndRunMethod(), "old goblin woman", "The target has been chosen as old goblin woman.", "Approach the old goblin woman from behind.", "Grab the handbag and run away fast!" ); } }StealingMethodTest.java000066400000000000000000000120421322244523500353650ustar00rootroot00000000000000java-design-patterns-1.18.0/template-method/src/test/java/com/iluwatar/templatemethod/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.templatemethod; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import java.util.LinkedList; import java.util.List; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.slf4j.LoggerFactory; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Date: 12/30/15 - 18:12 PM * @param Type of StealingMethod * @author Jeroen Meulemeester */ public abstract class StealingMethodTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(); } @AfterEach public void tearDown() { appender.stop(); } /** * The tested stealing method */ private final M method; /** * The expected target */ private final String expectedTarget; /** * The expected target picking result */ private final String expectedTargetResult; /** * The expected confusion method */ private final String expectedConfuseMethod; /** * The expected stealing method */ private final String expectedStealMethod; /** * Create a new test for the given stealing method, together with the expected results * * @param method The tested stealing method * @param expectedTarget The expected target name * @param expectedTargetResult The expected target picking result * @param expectedConfuseMethod The expected confusion method * @param expectedStealMethod The expected stealing method */ public StealingMethodTest(final M method, String expectedTarget, final String expectedTargetResult, final String expectedConfuseMethod, final String expectedStealMethod) { this.method = method; this.expectedTarget = expectedTarget; this.expectedTargetResult = expectedTargetResult; this.expectedConfuseMethod = expectedConfuseMethod; this.expectedStealMethod = expectedStealMethod; } /** * Verify if the thief picks the correct target */ @Test public void testPickTarget() { assertEquals(expectedTarget, this.method.pickTarget()); } /** * Verify if the target confusing step goes as planned */ @Test public void testConfuseTarget() { assertEquals(0, appender.getLogSize()); this.method.confuseTarget(this.expectedTarget); assertEquals(this.expectedConfuseMethod, appender.getLastMessage()); assertEquals(1, appender.getLogSize()); } /** * Verify if the stealing step goes as planned */ @Test public void testStealTheItem() { assertEquals(0, appender.getLogSize()); this.method.stealTheItem(this.expectedTarget); assertEquals(this.expectedStealMethod, appender.getLastMessage()); assertEquals(1, appender.getLogSize()); } /** * Verify if the complete steal process goes as planned */ @Test public void testSteal() { this.method.steal(); assertTrue(appender.logContains(this.expectedTargetResult)); assertTrue(appender.logContains(this.expectedConfuseMethod)); assertTrue(appender.logContains(this.expectedStealMethod)); assertEquals(3, appender.getLogSize()); } private class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender() { ((Logger) LoggerFactory.getLogger("root")).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public int getLogSize() { return log.size(); } public String getLastMessage() { return log.get(log.size() - 1).getFormattedMessage(); } public boolean logContains(String message) { return log.stream().anyMatch(event -> event.getFormattedMessage().equals(message)); } } } SubtleMethodTest.java000066400000000000000000000032231322244523500350560ustar00rootroot00000000000000java-design-patterns-1.18.0/template-method/src/test/java/com/iluwatar/templatemethod/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.templatemethod; /** * Date: 12/30/15 - 18:19 PM * * @author Jeroen Meulemeester */ public class SubtleMethodTest extends StealingMethodTest { /** * Create a new test for the {@link SubtleMethod} */ public SubtleMethodTest() { super( new SubtleMethod(), "shop keeper", "The target has been chosen as shop keeper.", "Approach the shop keeper with tears running and hug him!", "While in close contact grab the shop keeper's wallet." ); } }java-design-patterns-1.18.0/thread-pool/000077500000000000000000000000001322244523500200475ustar00rootroot00000000000000java-design-patterns-1.18.0/thread-pool/README.md000066400000000000000000000013151322244523500213260ustar00rootroot00000000000000--- layout: pattern title: Thread Pool folder: thread-pool permalink: /patterns/thread-pool/ categories: Concurrency tags: - Java - Difficulty-Intermediate - Performance --- ## Intent It is often the case that tasks to be executed are short-lived and the number of tasks is large. Creating a new thread for each task would make the system spend more time creating and destroying the threads than executing the actual tasks. 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>yp])EdWѬ;e 'dg{Pv,*B>nhTeXv:,\W\oHY`/e13]=.)Z7흵<e1豢X, LkuP *6(K/ ؠ,0( b , *%y4'+{UK%STTzʂXj,{H9\ҹur9_UIA,u, EY<`cqC\DW($[cUVU0jFFܑn+JՙyqYn..xng5%ߚ,6ƒCS.5PNWtGST3rs?%nO,ƒCS֩s9##gU('z+y.R1MV} java-design-patterns-1.18.0/thread-pool/pom.xml000066400000000000000000000040661322244523500213720ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 thread-pool org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.mockito mockito-core test java-design-patterns-1.18.0/thread-pool/src/000077500000000000000000000000001322244523500206365ustar00rootroot00000000000000java-design-patterns-1.18.0/thread-pool/src/main/000077500000000000000000000000001322244523500215625ustar00rootroot00000000000000java-design-patterns-1.18.0/thread-pool/src/main/java/000077500000000000000000000000001322244523500225035ustar00rootroot00000000000000java-design-patterns-1.18.0/thread-pool/src/main/java/com/000077500000000000000000000000001322244523500232615ustar00rootroot00000000000000java-design-patterns-1.18.0/thread-pool/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500251115ustar00rootroot00000000000000java-design-patterns-1.18.0/thread-pool/src/main/java/com/iluwatar/threadpool/000077500000000000000000000000001322244523500272525ustar00rootroot00000000000000java-design-patterns-1.18.0/thread-pool/src/main/java/com/iluwatar/threadpool/App.java000066400000000000000000000076161322244523500306470ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.threadpool; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.ArrayList; import java.util.List; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; /** * * Thread Pool pattern is where a number of threads are created to perform a number of tasks, which * are usually organized in a queue. The results from the tasks being executed might also be placed * in a queue, or the tasks might return no result. Typically, there are many more tasks than * threads. As soon as a thread completes its task, it will request the next task from the queue * until all tasks have been completed. The thread can then terminate, or sleep until there are new * tasks available. *

    * In this example we create a list of tasks presenting work to be done. Each task is then wrapped * into a {@link Worker} object that implements {@link Runnable}. We create an * {@link ExecutorService} with fixed number of threads (Thread Pool) and use them to execute the * {@link Worker}s. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point * * @param args command line args */ public static void main(String[] args) { LOGGER.info("Program started"); // Create a list of tasks to be executed List tasks = new ArrayList<>(); tasks.add(new PotatoPeelingTask(3)); tasks.add(new PotatoPeelingTask(6)); tasks.add(new CoffeeMakingTask(2)); tasks.add(new CoffeeMakingTask(6)); tasks.add(new PotatoPeelingTask(4)); tasks.add(new CoffeeMakingTask(2)); tasks.add(new PotatoPeelingTask(4)); tasks.add(new CoffeeMakingTask(9)); tasks.add(new PotatoPeelingTask(3)); tasks.add(new CoffeeMakingTask(2)); tasks.add(new PotatoPeelingTask(4)); tasks.add(new CoffeeMakingTask(2)); tasks.add(new CoffeeMakingTask(7)); tasks.add(new PotatoPeelingTask(4)); tasks.add(new PotatoPeelingTask(5)); // Creates a thread pool that reuses a fixed number of threads operating off a shared // unbounded queue. At any point, at most nThreads threads will be active processing // tasks. If additional tasks are submitted when all threads are active, they will wait // in the queue until a thread is available. ExecutorService executor = Executors.newFixedThreadPool(3); // Allocate new worker for each task // The worker is executed when a thread becomes // available in the thread pool for (int i = 0; i < tasks.size(); i++) { Runnable worker = new Worker(tasks.get(i)); executor.execute(worker); } // All tasks were executed, now shutdown executor.shutdown(); while (!executor.isTerminated()) { Thread.yield(); } LOGGER.info("Program finished"); } } java-design-patterns-1.18.0/thread-pool/src/main/java/com/iluwatar/threadpool/CoffeeMakingTask.java000066400000000000000000000030061322244523500332550ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.threadpool; /** * * CoffeeMakingTask is a concrete task * */ public class CoffeeMakingTask extends Task { private static final int TIME_PER_CUP = 100; public CoffeeMakingTask(int numCups) { super(numCups * TIME_PER_CUP); } @Override public String toString() { return String.format("%s %s", this.getClass().getSimpleName(), super.toString()); } } java-design-patterns-1.18.0/thread-pool/src/main/java/com/iluwatar/threadpool/PotatoPeelingTask.java000066400000000000000000000030261322244523500335130ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.threadpool; /** * * PotatoPeelingTask is a concrete task * */ public class PotatoPeelingTask extends Task { private static final int TIME_PER_POTATO = 200; public PotatoPeelingTask(int numPotatoes) { super(numPotatoes * TIME_PER_POTATO); } @Override public String toString() { return String.format("%s %s", this.getClass().getSimpleName(), super.toString()); } } java-design-patterns-1.18.0/thread-pool/src/main/java/com/iluwatar/threadpool/Task.java000066400000000000000000000033171322244523500310230ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.threadpool; import java.util.concurrent.atomic.AtomicInteger; /** * * Abstract base class for tasks * */ public abstract class Task { private static final AtomicInteger ID_GENERATOR = new AtomicInteger(); private final int id; private final int timeMs; public Task(final int timeMs) { this.id = ID_GENERATOR.incrementAndGet(); this.timeMs = timeMs; } public int getId() { return id; } public int getTimeMs() { return timeMs; } @Override public String toString() { return String.format("id=%d timeMs=%d", id, timeMs); } } java-design-patterns-1.18.0/thread-pool/src/main/java/com/iluwatar/threadpool/Worker.java000066400000000000000000000034121322244523500313660ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.threadpool; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * Worker implements {@link Runnable} and thus can be executed by {@link ExecutorService} * */ public class Worker implements Runnable { private static final Logger LOGGER = LoggerFactory.getLogger(Worker.class); private final Task task; public Worker(final Task task) { this.task = task; } @Override public void run() { LOGGER.info("{} processing {}", Thread.currentThread().getName(), task.toString()); try { Thread.sleep(task.getTimeMs()); } catch (InterruptedException e) { e.printStackTrace(); } } } java-design-patterns-1.18.0/thread-pool/src/test/000077500000000000000000000000001322244523500216155ustar00rootroot00000000000000java-design-patterns-1.18.0/thread-pool/src/test/java/000077500000000000000000000000001322244523500225365ustar00rootroot00000000000000java-design-patterns-1.18.0/thread-pool/src/test/java/com/000077500000000000000000000000001322244523500233145ustar00rootroot00000000000000java-design-patterns-1.18.0/thread-pool/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500251445ustar00rootroot00000000000000java-design-patterns-1.18.0/thread-pool/src/test/java/com/iluwatar/threadpool/000077500000000000000000000000001322244523500273055ustar00rootroot00000000000000java-design-patterns-1.18.0/thread-pool/src/test/java/com/iluwatar/threadpool/AppTest.java000066400000000000000000000025341322244523500315340ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.threadpool; import org.junit.jupiter.api.Test; /** * Application test * * @author ilkka * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } CoffeeMakingTaskTest.java000066400000000000000000000026461322244523500341020ustar00rootroot00000000000000java-design-patterns-1.18.0/thread-pool/src/test/java/com/iluwatar/threadpool/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.threadpool; /** * Date: 12/30/15 - 18:23 PM * * @author Jeroen Meulemeester */ public class CoffeeMakingTaskTest extends TaskTest { /** * Create a new test instance */ public CoffeeMakingTaskTest() { super(CoffeeMakingTask::new, 100); } } PotatoPeelingTaskTest.java000066400000000000000000000026511322244523500343320ustar00rootroot00000000000000java-design-patterns-1.18.0/thread-pool/src/test/java/com/iluwatar/threadpool/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.threadpool; /** * Date: 12/30/15 - 18:23 PM * * @author Jeroen Meulemeester */ public class PotatoPeelingTaskTest extends TaskTest { /** * Create a new test instance */ public PotatoPeelingTaskTest() { super(PotatoPeelingTask::new, 200); } }java-design-patterns-1.18.0/thread-pool/src/test/java/com/iluwatar/threadpool/TaskTest.java000066400000000000000000000111271322244523500317140ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.threadpool; import org.junit.jupiter.api.Test; import java.util.ArrayList; import java.util.List; import java.util.Objects; import java.util.concurrent.Callable; import java.util.concurrent.ExecutionException; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.Future; import java.util.function.IntFunction; import java.util.stream.Collectors; import static java.time.Duration.ofMillis; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertTimeout; /** * Date: 12/30/15 - 18:22 PM * Test for Tasks using a Thread Pool * @param Type of Task * @author Jeroen Meulemeester */ public abstract class TaskTest { /** * The number of tasks used during the concurrency test */ private static final int TASK_COUNT = 128 * 1024; /** * The number of threads used during the concurrency test */ private static final int THREAD_COUNT = 8; /** * The task factory, used to create new test items */ private final IntFunction factory; /** * The expected time needed to run the task 1 single time, in milli seconds */ private final int expectedExecutionTime; /** * Create a new test instance * * @param factory The task factory, used to create new test items * @param expectedExecutionTime The expected time needed to run the task 1 time, in milli seconds */ public TaskTest(final IntFunction factory, final int expectedExecutionTime) { this.factory = factory; this.expectedExecutionTime = expectedExecutionTime; } /** * Verify if the generated id is unique for each task, even if the tasks are created in separate * threads */ @Test public void testIdGeneration() throws Exception { assertTimeout(ofMillis(10000), () -> { final ExecutorService service = Executors.newFixedThreadPool(THREAD_COUNT); final List> tasks = new ArrayList<>(); for (int i = 0; i < TASK_COUNT; i++) { tasks.add(() -> factory.apply(1).getId()); } final List ids = service.invokeAll(tasks) .stream() .map(TaskTest::get) .filter(Objects::nonNull) .collect(Collectors.toList()); service.shutdownNow(); final long uniqueIdCount = ids.stream() .distinct() .count(); assertEquals(TASK_COUNT, ids.size()); assertEquals(TASK_COUNT, uniqueIdCount); }); } /** * Verify if the time per execution of a task matches the actual time required to execute the task * a given number of times */ @Test public void testTimeMs() { for (int i = 0; i < 10; i++) { assertEquals(this.expectedExecutionTime * i, this.factory.apply(i).getTimeMs()); } } /** * Verify if the task has some sort of {@link T#toString()}, different from 'null' */ @Test public void testToString() { assertNotNull(this.factory.apply(0).toString()); } /** * Extract the result from a future or returns 'null' when an exception occurred * * @param future The future we want the result from * @param The result type * @return The result or 'null' when a checked exception occurred */ private static O get(Future future) { try { return future.get(); } catch (InterruptedException | ExecutionException e) { return null; } } } java-design-patterns-1.18.0/thread-pool/src/test/java/com/iluwatar/threadpool/WorkerTest.java000066400000000000000000000034251322244523500322650ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.threadpool; import org.junit.jupiter.api.Test; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/30/15 - 18:21 PM * * @author Jeroen Meulemeester */ public class WorkerTest { /** * Verify if a worker does the actual job */ @Test public void testRun() { final Task task = mock(Task.class); final Worker worker = new Worker(task); verifyZeroInteractions(task); worker.run(); verify(task).getTimeMs(); verifyNoMoreInteractions(task); } }java-design-patterns-1.18.0/throttling/000077500000000000000000000000001322244523500200275ustar00rootroot00000000000000java-design-patterns-1.18.0/throttling/README.md000066400000000000000000000010561322244523500213100ustar00rootroot00000000000000--- layout: pattern title: Throttling folder: throttling permalink: /patterns/throttling/ categories: Behavioral tags: - Java - Difficulty-Beginner --- ## Intent Ensure that a given client is not able to access service resources more than the assigned limit. ## Applicability The Throttling pattern should be used: * when a service access needs to be restricted to not have high impacts on the performance of the service. * when multiple clients are consuming the same service resources and restriction has to be made according to the usage per client. java-design-patterns-1.18.0/throttling/etc/000077500000000000000000000000001322244523500206025ustar00rootroot00000000000000java-design-patterns-1.18.0/throttling/etc/throttling-pattern.png000066400000000000000000001657701322244523500252010ustar00rootroot00000000000000PNG  IHDR9DIDATx \ ([TTb[ĶR$KbIner=%E%(j6QIu]?u.r Yr|v;{ts:5ףg>9>9cΜZ@;@?k@ЛJk(?$UɏHTB04QzUQ ~M2M<|>T@ @U?HF²q͍(~~ϟ66mԾU*t(?N_߻wO?(Tܥ(%%9nn$F]xceu 4j0O5ȩmyx8^RoMoii]cGsw-0]u=ܼ)˯4o̘zzڭZ}>IM733 U VV@ @T M''Ƥ/&)i:"o>y2ʤ]hnL?a-tӦY͸>@o a׮E=zݻy|֥K5l=ĉhwhhTV@ @T MON^Qg͚/)izqqs W?##2~֣G%%95,*lƅLo aϞ<{KB;BC;Xqe4j0OtJzLM =yRoM/++?QM)k#11A"`3_ݩIm*. 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.throttling; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.iluwatar.throttling.timer.Throttler; import com.iluwatar.throttling.timer.ThrottleTimerImpl; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; /** * Throttling pattern is a design pattern to throttle or limit the use of resources or even a complete service by * users or a particular tenant. This can allow systems to continue to function and meet service level agreements, * even when an increase in demand places load on resources. *

    * In this example we have ({@link App}) as the initiating point of the service. * This is a time based throttling, i.e. only a certain number of calls are allowed per second. *

    * ({@link Tenant}) is the Tenant POJO class with which many tenants can be created * ({@link B2BService}) is the service which is consumed by the tenants and is throttled. */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Application entry point * @param args main arguments */ public static void main(String[] args) { Tenant adidas = new Tenant("Adidas", 5); Tenant nike = new Tenant("Nike", 6); ExecutorService executorService = Executors.newFixedThreadPool(2); executorService.execute(() -> makeServiceCalls(adidas)); executorService.execute(() -> makeServiceCalls(nike)); executorService.shutdown(); try { executorService.awaitTermination(10, TimeUnit.SECONDS); } catch (InterruptedException e) { LOGGER.error("Executor Service terminated: {}", e.getMessage()); } } /** * Make calls to the B2BService dummy API * @param service an instance of B2BService */ private static void makeServiceCalls(Tenant tenant) { Throttler timer = new ThrottleTimerImpl(10); B2BService service = new B2BService(timer); for (int i = 0; i < 20; i++) { service.dummyCustomerApi(tenant); // Sleep is introduced to keep the output in check and easy to view and analyze the results. try { Thread.sleep(1); } catch (InterruptedException e) { LOGGER.error("Thread interrupted: {}", e.getMessage()); } } } } java-design-patterns-1.18.0/throttling/src/main/java/com/iluwatar/throttling/B2BService.java000066400000000000000000000042551322244523500320260ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.throttling; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.iluwatar.throttling.timer.Throttler; import java.util.concurrent.ThreadLocalRandom; /** * A service which accepts a tenant and throttles the resource based on the time given to the tenant. */ class B2BService { private static final Logger LOGGER = LoggerFactory.getLogger(B2BService.class); public B2BService(Throttler timer) { timer.start(); } /** * * @return customer id which is randomly generated */ public int dummyCustomerApi(Tenant tenant) { String tenantName = tenant.getName(); long count = CallsCount.getCount(tenantName); LOGGER.debug("Counter for {} : {} ", tenant.getName(), count); if (count >= tenant.getAllowedCallsPerSecond()) { LOGGER.error("API access per second limit reached for: {}", tenantName); return -1; } CallsCount.incrementCount(tenantName); return getRandomCustomerId(); } private int getRandomCustomerId() { return ThreadLocalRandom.current().nextInt(1, 10000); } } java-design-patterns-1.18.0/throttling/src/main/java/com/iluwatar/throttling/CallsCount.java000066400000000000000000000050431322244523500322030ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.throttling; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.Map; import java.util.Map.Entry; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.atomic.AtomicLong; /** * A class to keep track of the counter of different Tenants * @author drastogi * */ public final class CallsCount { private static final Logger LOGGER = LoggerFactory.getLogger(CallsCount.class); private static Map tenantCallsCount = new ConcurrentHashMap<>(); /** * Add a new tenant to the map. * @param tenantName name of the tenant. */ public static void addTenant(String tenantName) { tenantCallsCount.putIfAbsent(tenantName, new AtomicLong(0)); } /** * Increment the count of the specified tenant. * @param tenantName name of the tenant. */ public static void incrementCount(String tenantName) { tenantCallsCount.get(tenantName).incrementAndGet(); } /** * * @param tenantName name of the tenant. * @return the count of the tenant. */ public static long getCount(String tenantName) { return tenantCallsCount.get(tenantName).get(); } /** * Resets the count of all the tenants in the map. */ public static void reset() { LOGGER.debug("Resetting the map."); for (Entry e : tenantCallsCount.entrySet()) { tenantCallsCount.put(e.getKey(), new AtomicLong(0)); } } } java-design-patterns-1.18.0/throttling/src/main/java/com/iluwatar/throttling/Tenant.java000066400000000000000000000040111322244523500313570ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.throttling; import java.security.InvalidParameterException; /** * A Pojo class to create a basic Tenant with the allowed calls per second. */ public class Tenant { private String name; private int allowedCallsPerSecond; /** * * @param name Name of the tenant * @param allowedCallsPerSecond The number of calls allowed for a particular tenant. * @throws InvalidParameterException If number of calls is less than 0, throws exception. */ public Tenant(String name, int allowedCallsPerSecond) { if (allowedCallsPerSecond < 0) { throw new InvalidParameterException("Number of calls less than 0 not allowed"); } this.name = name; this.allowedCallsPerSecond = allowedCallsPerSecond; CallsCount.addTenant(name); } public String getName() { return name; } public int getAllowedCallsPerSecond() { return allowedCallsPerSecond; } } java-design-patterns-1.18.0/throttling/src/main/java/com/iluwatar/throttling/timer/000077500000000000000000000000001322244523500304075ustar00rootroot00000000000000ThrottleTimerImpl.java000066400000000000000000000035371322244523500346330ustar00rootroot00000000000000java-design-patterns-1.18.0/throttling/src/main/java/com/iluwatar/throttling/timer/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ /** * */ package com.iluwatar.throttling.timer; import java.util.Timer; import java.util.TimerTask; import com.iluwatar.throttling.CallsCount; /** * Implementation of throttler interface. This class resets the counter every second. * @author drastogi * */ public class ThrottleTimerImpl implements Throttler { private int throttlePeriod; public ThrottleTimerImpl(int throttlePeriod) { this.throttlePeriod = throttlePeriod; } /** * A timer is initiated with this method. The timer runs every second and resets the * counter. */ public void start() { new Timer(true).schedule(new TimerTask() { @Override public void run() { CallsCount.reset(); } }, 0, throttlePeriod); } } java-design-patterns-1.18.0/throttling/src/main/java/com/iluwatar/throttling/timer/Throttler.java000066400000000000000000000025131322244523500332420ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ /** * */ package com.iluwatar.throttling.timer; /** * An interface for defining the structure of different types of throttling ways. * @author drastogi * */ public interface Throttler { void start(); } java-design-patterns-1.18.0/throttling/src/test/000077500000000000000000000000001322244523500215755ustar00rootroot00000000000000java-design-patterns-1.18.0/throttling/src/test/java/000077500000000000000000000000001322244523500225165ustar00rootroot00000000000000java-design-patterns-1.18.0/throttling/src/test/java/com/000077500000000000000000000000001322244523500232745ustar00rootroot00000000000000java-design-patterns-1.18.0/throttling/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500251245ustar00rootroot00000000000000java-design-patterns-1.18.0/throttling/src/test/java/com/iluwatar/throttling/000077500000000000000000000000001322244523500273225ustar00rootroot00000000000000java-design-patterns-1.18.0/throttling/src/test/java/com/iluwatar/throttling/AppTest.java000066400000000000000000000025051322244523500315470ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.throttling; import org.junit.jupiter.api.Test; /** * Application test */ public class AppTest { @Test public void test() { final String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/throttling/src/test/java/com/iluwatar/throttling/B2BServiceTest.java000066400000000000000000000035101322244523500327120ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.throttling; import com.iluwatar.throttling.timer.ThrottleTimerImpl; import com.iluwatar.throttling.timer.Throttler; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertTrue; /** * B2BServiceTest class to test the B2BService */ public class B2BServiceTest { @Test public void dummyCustomerApiTest() { Tenant tenant = new Tenant("testTenant", 2); Throttler timer = new ThrottleTimerImpl(100); B2BService service = new B2BService(timer); for (int i = 0; i < 5; i++) { service.dummyCustomerApi(tenant); } long counter = CallsCount.getCount(tenant.getName()); assertTrue(counter == 2, "Counter limit must be reached"); } } java-design-patterns-1.18.0/throttling/src/test/java/com/iluwatar/throttling/TenantTest.java000066400000000000000000000030661322244523500322630ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.throttling; import org.junit.jupiter.api.Test; import java.security.InvalidParameterException; import static org.junit.jupiter.api.Assertions.assertThrows; /** * TenantTest to test the creation of Tenant with valid parameters. */ public class TenantTest { @Test public void constructorTest() { assertThrows(InvalidParameterException.class, () -> { Tenant tenant = new Tenant("FailTenant", -1); }); } } java-design-patterns-1.18.0/tls/000077500000000000000000000000001322244523500164335ustar00rootroot00000000000000java-design-patterns-1.18.0/tls/README.md000066400000000000000000000015371322244523500177200ustar00rootroot00000000000000--- layout: pattern title: Thread Local Storage folder: tls permalink: /patterns/tls/ pumlid: categories: Concurrency tags: - Java - Difficulty-Intermediate --- ## Intent Securing variables global to a thread against being spoiled by other threads. That is needed if you use class variables or static variables in your Callable object or Runnable object that are not read-only. ![alt text](./etc/tls.png "Thread Local Storage") ## Applicability Use the Thread Local Storage in any of the following situations * when you use class variables in your Callable / Runnable object that are not read-only and you use the same Callable instance in more than one thread running in parallel. * when you use static variables in your Callable / Runnable object that are not read-only and more than one instances of the Callable / Runnable may run in parallel threads. java-design-patterns-1.18.0/tls/etc/000077500000000000000000000000001322244523500172065ustar00rootroot00000000000000java-design-patterns-1.18.0/tls/etc/tls.png000066400000000000000000001033151322244523500205210ustar00rootroot00000000000000PNG  IHDR\AaIDATx}]W}}?HVVF CyT%vh0AybpCrB*$N$;@'7! j  Π Q7YgZ諫}Y{={w N:˖-o@Ɉ\ '8"3T9,8@ <: N'/΂ p1,8Յ`nRT\&#g*N ;<:K@c Wk8h;<:KXIuEel2gU @WY,NӦF/Mno!"ilỳ0ouK%f87d5д0+lq x~tZco' ƙFbY@ 41N1^DUayg֌yҴ '-@gQ-Mbs/NXz- ߪq]2ضǸOҭ @{YP |p/r:-K:*h5[I_%ǻ0=*, ' e,N@w~ XFazК_nMN1['4퓱,N IhzڕշsQHq^{='* ?7lK[Nd'@gIt7,w1ܗ[+;ȭ.;,N`|[>w75>n"מzx0|PR?[sAok J e!t_% On8}ϝߕ7~*66A f'>]려2{p$Vcz/ΒN~?}]/ʺڿߪ}ybuu19s*^K(W#0( _%p q}}Cl@fP||5/ICX $O1LqDoG8h/<:KJ' /[kV=f' @{Y; p1,8@ <: N'/΂ p1,8@ <: N'/bwK27pZ] Rl, 4Ny,h|.FEbeoYl$I8>TPk}#궆l΍N']@gID@,[7L`=Mpw:hg{d΍'p$qMHt A^::_?t_%c?/q%{'`}a SdÜ7Y5N/Β L&1Qj|!x|iu&طMdXt_%] :Nhۘ'Pg,N zAyK)|J~z4o -iN i9ӡu: i9v8^I7bO%H7vPB 艄ٰ;á# ']@g;,I8h/<: xec#_^'p8 p1,8@ <:ˆ @Ɉ\ '82N:;<: N'/΂ p1,z @{ tu Yp8x~tN _'@g bYp8x~tp07KӕVK` +._V'p|/~4Ѷ $obJl,N~/ʼX( xA?\Xno,1N?}o'^z@,# ٧z ,[ǫr}Cjp^x~t;ɳ:!>j2> ØޱβnBҞ[%_^{`xC_}FK<jp4Ν;y;&I}>8V}27w4f'iyG >p4}Z/QbwBDDT>PtIJv zTp(ad< N&yq17z[7tVO3ŲT MK4b vb\(A 'b׮]NL&L,P8:dk{&ǜ W[2{0/(+S9NfE붕=\JNC0 N&Z'4FK㡿F[A杸eNIqu NC0 N^At{˓4!&@vB^I? 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.tls; import java.util.Calendar; import java.util.Date; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.Future; /** * ThreadLocal pattern *

    * This App shows how to create an isolated space per each thread. In this * example the usage of SimpleDateFormat is made to be thread-safe. This is an * example of the ThreadLocal pattern. *

    * By applying the ThreadLocal pattern you can keep track of application * instances or locale settings throughout the handling of a request. The * ThreadLocal class works like a static variable, with the exception that it is * only bound to the current thread! This allows us to use static variables in a * thread-safe way. *

    * In Java, thread-local variables are implemented by the ThreadLocal class * object. ThreadLocal holds a variable of type T, which is accessible via get/set * methods. *

    * SimpleDateFormat is one of the basic Java classes and is not thread-safe. If * you do not isolate the instance of SimpleDateFormat per each thread then * problems arise. *

    * App converts the String date value 15/12/2015 to the Date format using the * Java class SimpleDateFormat. It does this 20 times using 4 threads, each doing * it 5 times. With the usage of as ThreadLocal in DateFormatCallable everything * runs well. But if you comment out the ThreadLocal variant (marked with "//TLTL") * and comment in the non ThreadLocal variant (marked with "//NTLNTL") you can * see what will happen without the ThreadLocal. Most likely you will get incorrect * date values and / or exceptions. *

    * This example clearly show what will happen when using non thread-safe classes * in a thread. In real life this may happen one in of 1.000 or 10.000 conversions * and those are really hard to find errors. * * @author Thomas Bauer, 2017 */ public class App { /** * Program entry point * * @param args * command line args */ public static void main(String[] args) { int counterDateValues = 0; int counterExceptions = 0; // Create a callable DateFormatCallable callableDf = new DateFormatCallable("dd/MM/yyyy", "15/12/2015"); // start 4 threads, each using the same Callable instance ExecutorService executor = Executors.newCachedThreadPool(); Future futureResult1 = executor.submit(callableDf); Future futureResult2 = executor.submit(callableDf); Future futureResult3 = executor.submit(callableDf); Future futureResult4 = executor.submit(callableDf); try { Result[] result = new Result[4]; result[0] = futureResult1.get(); result[1] = futureResult2.get(); result[2] = futureResult3.get(); result[3] = futureResult4.get(); // Print results of thread executions (converted dates and raised exceptions) // and count them for (int i = 0; i < result.length; i++) { counterDateValues = counterDateValues + printAndCountDates(result[i]); counterExceptions = counterExceptions + printAndCountExceptions(result[i]); } // a correct run should deliver 20 times 15.12.2015 // and a correct run shouldn't deliver any exception System.out.println("The List dateList contains " + counterDateValues + " date values"); System.out.println("The List exceptionList contains " + counterExceptions + " exceptions"); } catch (Exception e) { System.out.println("Abnormal end of program. Program throws exception: " + e); } executor.shutdown(); } /** * Print result (date values) of a thread execution and count dates * * @param res contains results of a thread execution */ private static int printAndCountDates(Result res) { // a correct run should deliver 5 times 15.12.2015 per each thread int counter = 0; for (Date dt : res.getDateList()) { counter++; Calendar cal = Calendar.getInstance(); cal.setTime(dt); // Formatted output of the date value: DD.MM.YYYY System.out.println( cal.get(Calendar.DAY_OF_MONTH) + "." + cal.get(Calendar.MONTH) + "." + +cal.get(Calendar.YEAR)); } return counter; } /** * Print result (exceptions) of a thread execution and count exceptions * * @param res contains results of a thread execution * @return number of dates */ private static int printAndCountExceptions(Result res) { // a correct run shouldn't deliver any exception int counter = 0; for (String ex : res.getExceptionList()) { counter++; System.out.println(ex); } return counter; } } java-design-patterns-1.18.0/tls/src/main/java/com/iluwatar/tls/DateFormatCallable.java000066400000000000000000000076601322244523500306210ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2016 Thomas Bauer * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.tls; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.concurrent.Callable; /** * DateFormatCallable converts string dates to a date format using * SimpleDateFormat. The date format and the date value will be passed to the * Callable by the constructor. The constructor creates a instance of * SimpleDateFormat and stores it in a ThreadLocal class variable. For the * complete description of the example see {@link App} * * You can comment out the code marked with //TLTL and comment in the * code marked //NTLNTL. Then you can see what will happen if you do not * use the ThreadLocal. For details see the description of {@link App} * * @author Thomas Bauer, 2017 */ public class DateFormatCallable implements Callable { // class variables (members) private ThreadLocal df; //TLTL // private DateFormat df; //NTLNTL private String dateValue; // for dateValue Thread Local not needed /** * The date format and the date value are passed to the constructor * * @param inDateFormat * string date format string, e.g. "dd/MM/yyyy" * @param inDateValue * string date value, e.g. "21/06/2016" */ public DateFormatCallable(String inDateFormat, String inDateValue) { final String idf = inDateFormat; //TLTL this.df = new ThreadLocal() { //TLTL @Override //TLTL protected DateFormat initialValue() { //TLTL return new SimpleDateFormat(idf); //TLTL } //TLTL }; //TLTL // this.df = new SimpleDateFormat(inDateFormat); //NTLNTL this.dateValue = inDateValue; } /** * @see java.util.concurrent.Callable#call() */ @Override public Result call() { System.out.println(Thread.currentThread() + " started executing..."); Result result = new Result(); // Convert date value to date 5 times for (int i = 1; i <= 5; i++) { try { // this is the statement where it is important to have the // instance of SimpleDateFormat locally // Create the date value and store it in dateList result.getDateList().add(this.df.get().parse(this.dateValue)); //TLTL // result.getDateList().add(this.df.parse(this.dateValue)); //NTLNTL } catch (Exception e) { // write the Exception to a list and continue work result.getExceptionList().add(e.getClass() + ": " + e.getMessage()); } } System.out.println(Thread.currentThread() + " finished processing part of the thread"); return result; } } java-design-patterns-1.18.0/tls/src/main/java/com/iluwatar/tls/Result.java000066400000000000000000000041351322244523500264230ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ /* * Fiducia IT AG, All rights reserved. Use is subject to license terms. */ package com.iluwatar.tls; import java.util.ArrayList; import java.util.Date; import java.util.List; /** * Result object that will be returned by the Callable {@link DateFormatCallable} * used in {@link App} * * @author Thomas Bauer, 2017 */ public class Result { // A list to collect the date values created in one thread private List dateList = new ArrayList(); // A list to collect Exceptions thrown in one threads (should be none in // this example) private List exceptionList = new ArrayList(); /** * * @return List of date values collected within an thread execution */ public List getDateList() { return dateList; } /** * * @return List of exceptions thrown within an thread execution */ public List getExceptionList() { return exceptionList; } } java-design-patterns-1.18.0/tls/src/test/000077500000000000000000000000001322244523500202015ustar00rootroot00000000000000java-design-patterns-1.18.0/tls/src/test/java/000077500000000000000000000000001322244523500211225ustar00rootroot00000000000000java-design-patterns-1.18.0/tls/src/test/java/com/000077500000000000000000000000001322244523500217005ustar00rootroot00000000000000java-design-patterns-1.18.0/tls/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500235305ustar00rootroot00000000000000java-design-patterns-1.18.0/tls/src/test/java/com/iluwatar/tls/000077500000000000000000000000001322244523500243325ustar00rootroot00000000000000java-design-patterns-1.18.0/tls/src/test/java/com/iluwatar/tls/AppTest.java000066400000000000000000000026371322244523500265650ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2016 Thomas Bauer * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.tls; import org.junit.jupiter.api.Test; /** * Tests that thread local storage example runs without errors. * * @author Thomas Bauer, January 2017 * */ public class AppTest { @Test public void test() throws Exception { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/tls/src/test/java/com/iluwatar/tls/DateFormatCallableTest.java000066400000000000000000000120321322244523500315010ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2016 Thomas Bauer * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.tls; import java.util.ArrayList; import java.util.Arrays; import java.util.Calendar; import java.util.Date; import java.util.List; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.Future; import org.junit.jupiter.api.BeforeAll; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.fail; /** * * Test of the Callable * * In this test {@link DateFormatCallable} is tested with only one thread (i.e. without concurrency situation) *

    * After a successful run 5 date values should be in the result object. All dates should have * the same value (15.11.2015). To avoid problems with time zone not the date instances themselves * are compared by the test. For the test the dates are converted into string format DD.MM.YYY *

    * Additionally the number of list entries are tested for both the list with the date values * and the list with the exceptions * * @author Thomas Bauer, January 2017 * */ public class DateFormatCallableTest { // Class variables used in setup() have to be static because setup() has to be static /** * Result object given back by DateFormatCallable * -- Array with converted date values * -- Array with thrown exceptions */ static Result result; /** * The date values created by the run of of DateFormatRunnalbe. List will be filled in the setup() method */ static List createdDateValues = new ArrayList(); /** * Expected number of date values in the date value list created by the run of DateFormatRunnalbe */ int expectedCounterDateValues = 5; /** * Expected number of exceptions in the exception list created by the run of DateFormatRunnalbe. */ int expectedCounterExceptions = 0; /** * Expected content of the list containing the date values created by the run of DateFormatRunnalbe */ List expectedDateValues = Arrays.asList("15.11.2015", "15.11.2015", "15.11.2015", "15.11.2015", "15.11.2015"); /** * Run Callable and prepare results for usage in the test methods */ @BeforeAll public static void setup() { // Create a callable DateFormatCallable callableDf = new DateFormatCallable("dd/MM/yyyy", "15/12/2015"); // start thread using the Callable instance ExecutorService executor = Executors.newCachedThreadPool(); Future futureResult = executor.submit(callableDf); try { result = futureResult.get(); createdDateValues = convertDatesToString(result); } catch (Exception e) { fail("Setup failed: " + e); } executor.shutdown(); } private static List convertDatesToString(Result res) { // Format date value as DD.MM.YYYY if (res == null || res.getDateList() == null || res.getDateList().size() == 0) { return null; } List returnList = new ArrayList(); for (Date dt : res.getDateList()) { Calendar cal = Calendar.getInstance(); cal.setTime(dt); returnList.add(cal.get(Calendar.DAY_OF_MONTH) + "." + cal.get(Calendar.MONTH) + "." + cal.get(Calendar.YEAR)); } return returnList; } /** * Test date values after the run of DateFormatRunnalbe. A correct run should deliver 5 times 15.12.2015 */ @Test public void testDateValues() { assertEquals(expectedDateValues, createdDateValues); } /** * Test number of dates in the list after the run of DateFormatRunnalbe. A correct run should deliver 5 date values */ @Test public void testCounterDateValues() { assertEquals(expectedCounterDateValues, result.getDateList().size()); } /** * Test number of Exceptions in the list after the run of DateFormatRunnalbe. A correct run should deliver * no exceptions */ @Test public void testCounterExceptions() { assertEquals(expectedCounterExceptions, result.getExceptionList().size()); } } DateFormatCallableTestIncorrectDateFormat.java000066400000000000000000000110131322244523500352400ustar00rootroot00000000000000java-design-patterns-1.18.0/tls/src/test/java/com/iluwatar/tls/** * The MIT License * Copyright (c) 2016 Thomas Bauer * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.tls; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.Future; import org.junit.jupiter.api.BeforeAll; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.fail; /** * * Test of the Callable * * In this test {@link DateFormatCallable} is tested with only one thread (i.e. without concurrency situation) *

    * An incorrect formatted date is passed to the Callable * After a successful run 0 date values and 5 exceptions should be in the result object. * * @author Thomas Bauer, January 2017 * */ public class DateFormatCallableTestIncorrectDateFormat { // Class variables used in setup() have to be static because setup() has to be static /** * Result object given back by DateFormatCallable * -- Array with converted date values * -- Array with thrown exceptions */ static Result result; /** * The date values created by the run of DateFormatRunnalbe. List will be filled in the setup() method */ static List createdExceptions = new ArrayList(); /** * Expected number of date values in the date value list created by the run of DateFormatRunnalbe */ int expectedCounterDateValues = 0; /** * Expected number of exceptions in the exception list created by the run of DateFormatRunnalbe. */ int expectedCounterExceptions = 5; /** * Expected content of the list containing the exceptions created by the run of DateFormatRunnalbe */ List expectedExceptions = Arrays.asList("class java.text.ParseException: Unparseable date: \"15.12.2015\"", "class java.text.ParseException: Unparseable date: \"15.12.2015\"", "class java.text.ParseException: Unparseable date: \"15.12.2015\"", "class java.text.ParseException: Unparseable date: \"15.12.2015\"", "class java.text.ParseException: Unparseable date: \"15.12.2015\""); /** * Run Callable and prepare results for usage in the test methods */ @BeforeAll public static void setup() { // Create a callable. Pass a string date value not matching the format string DateFormatCallable callableDf = new DateFormatCallable("dd/MM/yyyy", "15.12.2015"); // start thread using the Callable instance ExecutorService executor = Executors.newCachedThreadPool(); Future futureResult = executor.submit(callableDf); try { result = futureResult.get(); } catch (Exception e) { fail("Setup failed: " + e); } executor.shutdown(); } /** * Test Exceptions after the run of DateFormatRunnalbe. A correct run should deliver 5 times the * same exception */ @Test public void testExecptions() { assertEquals(expectedExceptions, result.getExceptionList()); } /** * Test number of dates in the list after the run of DateFormatRunnalbe. A correct run should deliver no date values */ @Test public void testCounterDateValues() { assertEquals(expectedCounterDateValues, result.getDateList().size()); } /** * Test number of Exceptions in the list after the run of DateFormatRunnalbe. A correct run should * deliver 5 exceptions */ @Test public void testCounterExceptions() { assertEquals(expectedCounterExceptions, result.getExceptionList().size()); } } DateFormatCallableTestMultiThread.java000066400000000000000000000133261322244523500335740ustar00rootroot00000000000000java-design-patterns-1.18.0/tls/src/test/java/com/iluwatar/tls/** * The MIT License * Copyright (c) 2016 Thomas Bauer * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.tls; import java.util.ArrayList; import java.util.Arrays; import java.util.Calendar; import java.util.Date; import java.util.List; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.Future; import org.junit.jupiter.api.BeforeAll; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.fail; /** * * Test of the Callable * * In this test {@link DateFormatCallable} is used by 4 threads in parallel *

    * After a successful run 5 date values should be in the result object of each thread. All dates * should have the same value (15.11.2015). To avoid problems with time zone not the date instances * themselves are compared by the test. For the test the dates are converted into string format DD.MM.YYY *

    * Additionally the number of list entries are tested for both the list with the date values * and the list with the exceptions * * @author Thomas Bauer, January 2017 * */ public class DateFormatCallableTestMultiThread { // Class variables used in setup() have to be static because setup() has to be static /** * Result object given back by DateFormatCallable, one for each thread * -- Array with converted date values * -- Array with thrown exceptions */ static Result[] result = new Result[4]; /** * The date values created by the run of of DateFormatRunnalbe. List will be filled in the setup() method */ @SuppressWarnings("serial") static class StringArrayList extends ArrayList { /* nothing needed here */ } static List[] createdDateValues = new StringArrayList[4]; /** * Expected number of date values in the date value list created by each thread */ int expectedCounterDateValues = 5; /** * Expected number of exceptions in the exception list created by each thread */ int expectedCounterExceptions = 0; /** * Expected content of the list containing the date values created by each thread */ List expectedDateValues = Arrays.asList("15.11.2015", "15.11.2015", "15.11.2015", "15.11.2015", "15.11.2015"); /** * Run Callable and prepare results for usage in the test methods */ @BeforeAll public static void setup() { // Create a callable DateFormatCallable callableDf = new DateFormatCallable("dd/MM/yyyy", "15/12/2015"); // start thread using the Callable instance ExecutorService executor = Executors.newCachedThreadPool(); Future futureResult1 = executor.submit(callableDf); Future futureResult2 = executor.submit(callableDf); Future futureResult3 = executor.submit(callableDf); Future futureResult4 = executor.submit(callableDf); try { result[0] = futureResult1.get(); result[1] = futureResult2.get(); result[2] = futureResult3.get(); result[3] = futureResult4.get(); for (int i = 0; i < result.length; i++) { createdDateValues[i] = convertDatesToString(result[i]); } } catch (Exception e) { fail("Setup failed: " + e); } executor.shutdown(); } private static List convertDatesToString(Result res) { // Format date value as DD.MM.YYYY if (res == null || res.getDateList() == null || res.getDateList().size() == 0) { return null; } List returnList = new StringArrayList(); for (Date dt : res.getDateList()) { Calendar cal = Calendar.getInstance(); cal.setTime(dt); returnList.add(cal.get(Calendar.DAY_OF_MONTH) + "." + cal.get(Calendar.MONTH) + "." + cal.get(Calendar.YEAR)); } return returnList; } /** * Test date values after the run of DateFormatRunnalbe. A correct run should deliver 5 times 15.12.2015 * by each thread */ @Test public void testDateValues() { for (int i = 0; i < createdDateValues.length; i++) { assertEquals(expectedDateValues, createdDateValues[i]); } } /** * Test number of dates in the list after the run of DateFormatRunnalbe. A correct run should * deliver 5 date values by each thread */ @Test public void testCounterDateValues() { for (int i = 0; i < result.length; i++) { assertEquals(expectedCounterDateValues, result[i].getDateList().size()); } } /** * Test number of Exceptions in the list after the run of DateFormatRunnalbe. A correct run should * deliver no exceptions */ @Test public void testCounterExceptions() { for (int i = 0; i < result.length; i++) { assertEquals(expectedCounterExceptions, result[i].getExceptionList().size()); } } } java-design-patterns-1.18.0/tolerant-reader/000077500000000000000000000000001322244523500207215ustar00rootroot00000000000000java-design-patterns-1.18.0/tolerant-reader/README.md000066400000000000000000000013431322244523500222010ustar00rootroot00000000000000--- layout: pattern title: Tolerant Reader folder: tolerant-reader permalink: /patterns/tolerant-reader/ categories: Integration tags: - Java - Difficulty-Beginner --- ## Intent Tolerant Reader is an integration pattern that helps creating robust communication systems. The idea is to be as tolerant as possible when reading data from another service. This way, when the communication schema changes, the readers must not break. ![alt text](./etc/tolerant-reader.png "Tolerant Reader") ## Applicability Use the Tolerant Reader pattern when * the communication schema can evolve and change and yet the receiving side should not break ## Credits * [Martin Fowler - Tolerant Reader](http://martinfowler.com/bliki/TolerantReader.html) java-design-patterns-1.18.0/tolerant-reader/etc/000077500000000000000000000000001322244523500214745ustar00rootroot00000000000000java-design-patterns-1.18.0/tolerant-reader/etc/tolerant-reader.png000066400000000000000000000500421322244523500252730ustar00rootroot00000000000000PNG  IHDR7wOIDATx_%Ga毲GyE~qɌHbFĖ 5xq@ fc2fchgl|xQ& ]G?]3DH:ݧs>]?UTw1RF@ T Vpo6DF:/w T V k2H@K@`#Dƞ~Z*!*5P)QJFJ=dȴ0 liE}&*5P)G6/L BTRcO?-'*5iֆ^$Tp~>URcO?-!yF. !e7:EW yݣKM/"iث?yWmѢ [fm4]*rT{h G=z8wky^zMq{^^mqy󽺛F^Wm\(zw[ܖP\B[.dFDl% *5Q;Nwϙ߈(on>9?G?C~~qCb$JLuu(7ȑc v}1=X%o:*5Q[/qy[oG~8?q׭'߯MeI3aT[JmTY(Jy){$ZxsHRyL *1)Tj%$R;:vᔈҿ\wO-kOa-mUȷTXKH!_ʟrM*Uc[CwhT{h _8vw߷[7COo{/oѝ9;%:3VT!H ܛ1L *4ƞ~ZB"*?x_8_YFoۓgWs 2M^PzƖR?ف/XddC6` S) fRia%$R';㎯|hO>ǿғ83W:]=Qf 7G*Q͞LOaﲳ2To0Q\ny{|ޯ=p3XQ%ʨRU/WLtE,SjlKcO?-!)e]|C_:;RcO?-!5=%*5P)QJFJ=T 6BTj%RRcO?-{h l@K@`#Dƞ~ZB*5E }qk>=d[Cƞ~ZB*JJKTj%4RyyvEypgHT:6VFXNNcfכݦlG]LlUzrE1]C3n{gK>)4)ߙ=n*ƞ~ZB*% F!sӊwQKNKɺR-_WVIQ/e]_hW(~Sr(W1(uGTQ!|sxJR`%4R~~Ӭ-W w7T1k_9X=2rT]G 5-|<˟KEZcO?-+`MԢ.N*deWѐcDCFj5@ɬ=Tj}=xg{R-E,Zq_mKi5&3U~´C@Khx\,RtO6 SjǥWTH=.e~jcO?- ?J9+wezy+;j[>n1~9~ Șexc]Eט+DA?sPF0R)8vRcO?-{h l@K@`#Dƞ~Z*!*5P)Qo6X"#u;*@+ؠ-m#0JFJ=T 6BTj%h*5+/;AvKu揝'.(KpDƞ~ZRBKAuIt#LT~I,c;,9^lU@uIRE7Pnt+&^zue}k|& W%ys?d/ |ļkGF1J2ҫT g_kXYN% UņGP}egW6?1nNnʼnv$*5PRL*/?sWY=$ݟyfvM/_zS=ps1VuA՝hbC$[a)¦@c"߹]9#yRL wQq U ^q_Ts?\{W׭֕vIy/|cM2qɋݢ@A*uѣ"+D3E*%y:ЮLzUӢRZYZ/mg)UxVT,K@$6./Vin*/mkO&UQݯ|cP)[7,O\S/RJca1U)oZq;d@nr]Mcemkz֙=R}U*ݧw >{KjBYF΍'x]@2Se$wF65O066nHZAJĊfDŽq`*:d-=ɸTb uKu;O3_&^z*jv7ZH*؋_?s> ΫwJ%DgAoDm@yU">ƘxTyExULF%2i\=>8%yP)!E{O7_:?@}򳏾?w*T>jJMW*T***LR2ܸhunLUs~7?śqOO_SkKK{&/C0teZ#Gf~)ȳwJ) 3f)6ձ}/qލUʼ7W*Y9~wmlU5Mh]n}pWm;w<{֓{w]|qu\L4JIӍ,ay){$+[zTCg+5@-j%gTDpg<b~]./s_x7v_<>TثuG_/Vg&%Dz[]ʟZDɌ -c )KW=r!3~1,q^Tȴ&yRO}CoW~?9͛VGwdqi\-UR -Y. 2 UJ)!dEBnYTj6&qRrdyĘɟu?ߞ|?Wdqgl) SQ'd y֑jacJI%NJ6ޥR| "0ҋJFx>N~w>|_|ۏ'_qgxן%J7U[1$Ut2r*>nj4ewEK.-d.Zc-q T 6yD{BH-qϙ}W3D]qD;j{S4o>.ΞP,3}}{#\^T 6y':+/(J2қb#LT ٫wf5.ev@d<R-eCsFd=0N5.es*&#`*UZԺX@my=R W)-OHDt/Q}ڒ(wvTұ^ eVj } QV=ޯ'>]C3n{gK>)0˜qz^+PF[^mWWݬyR`"QCs]$ߏA*55B6/NJճdy`y~Sr(W1(uGTQ!|sx!G5Xx>TMQRiRb)k5LHYm^ꑑc]u”E䴸GL7:jLrT2|vL4TT^lOVԢEuE6⾪ۖj|Mf\󫔱RuKow]pPLT QNiBJ@`_xu=)(N UcfBYY/s7E`O CywxqN?G@}޶@ rl%Njuzu+.bj_-U~Y畖vL 14lDh۩2PȠ-KS]fUNJd7xݧOˋb(ot^܄}eիǏ߿Ç/]Tؖ2{M V;61і69 =rؘy>+)ϟL&7tܴTи}ôvԖrY3hZ P 2[R]}ejִZ@<5u\ʴ)|P?veUjt<{Bt:ű88q[;>wܡC|AѮhl&sEc[+z['s 1nըYs?-ct@#RWt\Qx q|ڵxwwW(ŋrBQN:5+E[;ﱩx>{mM&N N!*JRسgϊLEK. $*%NZ"@@-ձCT }e:Bn馼#~wL'wTjv;u7 c"')=w7 q|}&;**u;ϞpLs% {Q)Sbu#d0| T}F3+%m>+Y&kbbTxK/*a<* A.6RɩLQ&{۔[5lLR&# TS?7L=׶kտ)uiNd Ӄ`7JCP^,Qnq&R~=çāW kվ2L'Tf):VS/{7v)Wtg/LumltUa(w'//)r&Ec0mojs C|Ja[0/T3=W=/8}\+NjKa95nJ%dUt+y^< %d{c۝SIQx}`m&ib׭R=ѝr&淭@*Uezׅ+Qyޏ~sTW+WjCXTj`RZ*[+̧h9r2biL G\P x6JuJ9z]\6^WѨu]Xz>u>J=p~'^:Nw'͙oVfkڹJ-*\c{"϶#vZ9Vǰ+f $s_TTy_*@HV[krw`;|A'~wSw>~ q fUTf6*~ʹű_=fd:?,MKo`[$6pu%cau܋Jx>ЙgW櫘e7`|m)ꤤ^!by3級>Q[ h9k-|jU)WﲝԒ*n٢o L *5_W2|`iae$X|{v|okM֖ŠM&#b#hH͒/ Qt@`_x@-yRLvUpW/_|W!(.ؘxglXQ>OplLR&#`]*w K/*a<3;eVЬG&1`y3pro _뚙{xݷmw1VT+yJva>3i5nt FR(L:wbiKVcҖӠR C[M!yʹb~jϺ#| yO1za_x Xz1bF_d#]񓩇PE޾^T֍;W])^ty$:&9eVdԏb(޾^TSsϺ#|=5ϠWҟp}/lWIJWAy&^zQ)gUl]fOx&^zQ)cެ2Uܚ$ jwe?+{xE`#Ly*Tc#]o]ԥkb#CjGNU9ΞKY9PoK@z ߚejed!h3ldv^Z6U"/e<R]CM TW+մf6^^ -WYhݿ7ήX{w#;Jќ37tTFM T|YZZT,Y`L7jsp,IZUpCe<RpTL TY/-SW)ZwOʷ;\&#}eVvRSl" jWkKXRxy K@,KyfN JY;\&#^W&^z*piG6S⯎ږdVy`UFI$ly>W/+/uZerHLԼFzgN'G ޻ Z~/ڽm_Kw^X]GpjLR&#^~4{7h{umڕoH1ҋJFx>z͋6q!(NjVk ^$ #8-&^zQ)АWu#Z?r𢭿=}Y,*ej>z'K/*a<k Z~y !]ыAzKo*%罕M8W hȫ>AUnޠj5N{ug^NH*ey7łV*.-U?U󢵼.y =a]ZϬŭDyLaTͩh^[jѫRXQR2|Q)8B&^zmEVˋ~3bREe<P)W&^zm*WoqƸc=+^T*"J2(P-y nf,RRF׶2|U{Y@9ÒFl^72!4@oR?5 T^ҥK]"iUj6nM k+^{j*WvtJY@ 0/{ʠ-ƚmƭi 0/{8~8-*#&*55qܹoƍ]G$9RRcO?X׮]: ){A#mﾛ?l‰'PuJFJ=A0:%j{k"J|p$S{A=p׻HRm[VzVbMj(tES{A8qٳgEpT+^Qޑv;4Ցx RcO?h#oQ9T-^kƗŸo]!mW+{,æNlM3KG)J=%\xq]6jѫ׬R4]Kۮםy%=NG`k % G)J==:uj̻(TE^_}ә[ @6P6?qx RcO?h׮]?J뚃RSz]+f4_7BtЍS{A8~d2PT*WoR>kM*홫*ƞ~'NMfyzǥ|q)S[\ Ӹ7$R}Fƞ~ (DCfx]geB{BE2d:6o¨a2lnnvxp2lܫ7ٗ.Ǒx RcO?7n?XZ*ejt-S{A|;w(mƽz}0*5-drѮ#:&*5BotցJFJ=+\z]ǢERRcO? ׯ_?pӧH[@`#Dƞ~!P xO T 6BTjŋ'N:#Jͷ~-k5ۧ ̷]f KTj#TJb%D[G$YoPnN6,{A d[ͫ_k;.Tj$V^RcO?HCZPzeBW՜P gfo[]z6 Cu;#xVcO?HW^MZj!"pl;\zkʪ0[yA9D۷w]k:MDZw V^RcO?nױXQ{AX{Apҥō{Ap쟴o6X"#u;*s8p-g J۷o0.]mZ*zWv.>|}:t눀JDz|7ntM|T Ν;p@ױٳG88tJ~ѩn7 )ќ:: ]RvڡC7޸7NHN8qѮcBqqysmnnv2P)0(ؿlq)}#P)0L8.]4Lj'E[ST 'Nxbױ.>|  Ds4Q./p JB& B eR:X8@0qq~'rN#P)0dAmN2=J_:-)ӁhHyMu4AZ@(41ztY 7nܘL&t%%T xAK.u P* AhӧJ/"`D~?uD,!TM,ƈ],ƈ^EH U @d0j={};* QCn7x눌, ,w}7* 0իW:{|<T xA@Amhc1a=R D馛nŗUR  vww]/_{@d(._i\ T xA wu T xA`SN }UJ8pӨ ,W^=~hB>|@qtzM7P)Y:Ο??L2??۷Ξ=uT xAi瓟Эc4@R ~} j@@ l2_nHlT *! 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.tolerantreader; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.IOException; /** * * Tolerant Reader is an integration pattern that helps creating robust communication systems. The * idea is to be as tolerant as possible when reading data from another service. This way, when the * communication schema changes, the readers must not break. *

    * In this example we use Java serialization to write representations of {@link RainbowFish} objects * to file. {@link RainbowFish} is the initial version which we can easily read and write using * {@link RainbowFishSerializer} methods. {@link RainbowFish} then evolves to {@link RainbowFishV2} * and we again write it to file with a method designed to do just that. However, the reader client * does not know about the new format and still reads with the method designed for V1 schema. * Fortunately the reading method has been designed with the Tolerant Reader pattern and does not * break even though {@link RainbowFishV2} has new fields that are serialized. * */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point */ public static void main(String[] args) throws IOException, ClassNotFoundException { // Write V1 RainbowFish fishV1 = new RainbowFish("Zed", 10, 11, 12); LOGGER.info("fishV1 name={} age={} length={} weight={}", fishV1.getName(), fishV1.getAge(), fishV1.getLengthMeters(), fishV1.getWeightTons()); RainbowFishSerializer.writeV1(fishV1, "fish1.out"); // Read V1 RainbowFish deserializedFishV1 = RainbowFishSerializer.readV1("fish1.out"); LOGGER.info("deserializedFishV1 name={} age={} length={} weight={}", deserializedFishV1.getName(), deserializedFishV1.getAge(), deserializedFishV1.getLengthMeters(), deserializedFishV1.getWeightTons()); // Write V2 RainbowFishV2 fishV2 = new RainbowFishV2("Scar", 5, 12, 15, true, true, true); LOGGER.info( "fishV2 name={} age={} length={} weight={} sleeping={} hungry={} angry={}", fishV2.getName(), fishV2.getAge(), fishV2.getLengthMeters(), fishV2.getWeightTons(), fishV2.getHungry(), fishV2.getAngry(), fishV2.getSleeping()); RainbowFishSerializer.writeV2(fishV2, "fish2.out"); // Read V2 with V1 method RainbowFish deserializedFishV2 = RainbowFishSerializer.readV1("fish2.out"); LOGGER.info("deserializedFishV2 name={} age={} length={} weight={}", deserializedFishV2.getName(), deserializedFishV2.getAge(), deserializedFishV2.getLengthMeters(), deserializedFishV2.getWeightTons()); } } RainbowFish.java000066400000000000000000000035701322244523500340020ustar00rootroot00000000000000java-design-patterns-1.18.0/tolerant-reader/src/main/java/com/iluwatar/tolerantreader/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.tolerantreader; import java.io.Serializable; /** * * RainbowFish is the initial schema * */ public class RainbowFish implements Serializable { private static final long serialVersionUID = 1L; private String name; private int age; private int lengthMeters; private int weightTons; /** * Constructor */ public RainbowFish(String name, int age, int lengthMeters, int weightTons) { this.name = name; this.age = age; this.lengthMeters = lengthMeters; this.weightTons = weightTons; } public String getName() { return name; } public int getAge() { return age; } public int getLengthMeters() { return lengthMeters; } public int getWeightTons() { return weightTons; } } RainbowFishSerializer.java000066400000000000000000000073441322244523500360370ustar00rootroot00000000000000java-design-patterns-1.18.0/tolerant-reader/src/main/java/com/iluwatar/tolerantreader/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.tolerantreader; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.util.HashMap; import java.util.Map; /** * * RainbowFishSerializer provides methods for reading and writing {@link RainbowFish} objects to * file. Tolerant Reader pattern is implemented here by serializing maps instead of * {@link RainbowFish} objects. This way the reader does not break even though new properties are * added to the schema. * */ public final class RainbowFishSerializer { private RainbowFishSerializer() { } /** * Write V1 RainbowFish to file */ public static void writeV1(RainbowFish rainbowFish, String filename) throws IOException { Map map = new HashMap<>(); map.put("name", rainbowFish.getName()); map.put("age", String.format("%d", rainbowFish.getAge())); map.put("lengthMeters", String.format("%d", rainbowFish.getLengthMeters())); map.put("weightTons", String.format("%d", rainbowFish.getWeightTons())); try (FileOutputStream fileOut = new FileOutputStream(filename); ObjectOutputStream objOut = new ObjectOutputStream(fileOut)) { objOut.writeObject(map); } } /** * Write V2 RainbowFish to file */ public static void writeV2(RainbowFishV2 rainbowFish, String filename) throws IOException { Map map = new HashMap<>(); map.put("name", rainbowFish.getName()); map.put("age", String.format("%d", rainbowFish.getAge())); map.put("lengthMeters", String.format("%d", rainbowFish.getLengthMeters())); map.put("weightTons", String.format("%d", rainbowFish.getWeightTons())); map.put("angry", Boolean.toString(rainbowFish.getAngry())); map.put("hungry", Boolean.toString(rainbowFish.getHungry())); map.put("sleeping", Boolean.toString(rainbowFish.getSleeping())); try (FileOutputStream fileOut = new FileOutputStream(filename); ObjectOutputStream objOut = new ObjectOutputStream(fileOut)) { objOut.writeObject(map); } } /** * Read V1 RainbowFish from file */ public static RainbowFish readV1(String filename) throws IOException, ClassNotFoundException { Map map = null; try (FileInputStream fileIn = new FileInputStream(filename); ObjectInputStream objIn = new ObjectInputStream(fileIn)) { map = (Map) objIn.readObject(); } return new RainbowFish(map.get("name"), Integer.parseInt(map.get("age")), Integer.parseInt(map.get("lengthMeters")), Integer.parseInt(map.get("weightTons"))); } } RainbowFishV2.java000066400000000000000000000037421322244523500342130ustar00rootroot00000000000000java-design-patterns-1.18.0/tolerant-reader/src/main/java/com/iluwatar/tolerantreader/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.tolerantreader; /** * * RainbowFishV2 is the evolved schema * */ public class RainbowFishV2 extends RainbowFish { private static final long serialVersionUID = 1L; private boolean sleeping; private boolean hungry; private boolean angry; public RainbowFishV2(String name, int age, int lengthMeters, int weightTons) { super(name, age, lengthMeters, weightTons); } /** * Constructor */ public RainbowFishV2(String name, int age, int lengthMeters, int weightTons, boolean sleeping, boolean hungry, boolean angry) { this(name, age, lengthMeters, weightTons); this.sleeping = sleeping; this.hungry = hungry; this.angry = angry; } public boolean getSleeping() { return sleeping; } public boolean getHungry() { return hungry; } public boolean getAngry() { return angry; } } java-design-patterns-1.18.0/tolerant-reader/src/test/000077500000000000000000000000001322244523500224675ustar00rootroot00000000000000java-design-patterns-1.18.0/tolerant-reader/src/test/java/000077500000000000000000000000001322244523500234105ustar00rootroot00000000000000java-design-patterns-1.18.0/tolerant-reader/src/test/java/com/000077500000000000000000000000001322244523500241665ustar00rootroot00000000000000java-design-patterns-1.18.0/tolerant-reader/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500260165ustar00rootroot00000000000000java-design-patterns-1.18.0/tolerant-reader/src/test/java/com/iluwatar/tolerantreader/000077500000000000000000000000001322244523500310315ustar00rootroot00000000000000java-design-patterns-1.18.0/tolerant-reader/src/test/java/com/iluwatar/tolerantreader/AppTest.java000066400000000000000000000032571322244523500332630ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.tolerantreader; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import java.io.File; import java.io.IOException; /** * * Application test * */ public class AppTest { @Test public void test() throws ClassNotFoundException, IOException { String[] args = {}; App.main(args); } @BeforeEach @AfterEach public void cleanup() { File file1 = new File("fish1.out"); file1.delete(); File file2 = new File("fish2.out"); file2.delete(); } } RainbowFishSerializerTest.java000066400000000000000000000063551322244523500367330ustar00rootroot00000000000000java-design-patterns-1.18.0/tolerant-reader/src/test/java/com/iluwatar/tolerantreader/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.tolerantreader; import org.junit.Rule; import org.junit.jupiter.api.Test; import org.junit.jupiter.migrationsupport.rules.EnableRuleMigrationSupport; import org.junit.rules.TemporaryFolder; import java.io.File; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertNotSame; /** * Date: 12/30/15 - 18:39 PM * * @author Jeroen Meulemeester */ @EnableRuleMigrationSupport public class RainbowFishSerializerTest { /** * Create a temporary folder, used to generate files in during this test */ @Rule public final TemporaryFolder testFolder = new TemporaryFolder(); /** * Rainbow fish version 1 used during the tests */ private static final RainbowFish V1 = new RainbowFish("version1", 1, 2, 3); /** * Rainbow fish version 2 used during the tests */ private static final RainbowFishV2 V2 = new RainbowFishV2("version2", 4, 5, 6, true, false, true); /** * Verify if a fish, written as version 1 can be read back as version 1 */ @Test public void testWriteV1ReadV1() throws Exception { final File outputFile = this.testFolder.newFile(); RainbowFishSerializer.writeV1(V1, outputFile.getPath()); final RainbowFish fish = RainbowFishSerializer.readV1(outputFile.getPath()); assertNotSame(V1, fish); assertEquals(V1.getName(), fish.getName()); assertEquals(V1.getAge(), fish.getAge()); assertEquals(V1.getLengthMeters(), fish.getLengthMeters()); assertEquals(V1.getWeightTons(), fish.getWeightTons()); } /** * Verify if a fish, written as version 2 can be read back as version 1 */ @Test public void testWriteV2ReadV1() throws Exception { final File outputFile = this.testFolder.newFile(); RainbowFishSerializer.writeV2(V2, outputFile.getPath()); final RainbowFish fish = RainbowFishSerializer.readV1(outputFile.getPath()); assertNotSame(V2, fish); assertEquals(V2.getName(), fish.getName()); assertEquals(V2.getAge(), fish.getAge()); assertEquals(V2.getLengthMeters(), fish.getLengthMeters()); assertEquals(V2.getWeightTons(), fish.getWeightTons()); } }RainbowFishTest.java000066400000000000000000000032671322244523500347000ustar00rootroot00000000000000java-design-patterns-1.18.0/tolerant-reader/src/test/java/com/iluwatar/tolerantreader/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.tolerantreader; import org.junit.Test; import static org.junit.Assert.assertEquals; /** * Date: 12/30/15 - 18:34 PM * * @author Jeroen Meulemeester */ public class RainbowFishTest { /** * Verify if the getters of a {@link RainbowFish} return the expected values */ @Test public void testValues() { final RainbowFish fish = new RainbowFish("name", 1, 2, 3); assertEquals("name", fish.getName()); assertEquals(1, fish.getAge()); assertEquals(2, fish.getLengthMeters()); assertEquals(3, fish.getWeightTons()); } }RainbowFishV2Test.java000066400000000000000000000035221322244523500351020ustar00rootroot00000000000000java-design-patterns-1.18.0/tolerant-reader/src/test/java/com/iluwatar/tolerantreader/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.tolerantreader; import org.junit.Test; import static org.junit.Assert.assertEquals; /** * Date: 12/30/15 - 18:35 PM * * @author Jeroen Meulemeester */ public class RainbowFishV2Test { /** * Verify if the getters of a {@link RainbowFish} return the expected values */ @Test public void testValues() { final RainbowFishV2 fish = new RainbowFishV2("name", 1, 2, 3, false, true, false); assertEquals("name", fish.getName()); assertEquals(1, fish.getAge()); assertEquals(2, fish.getLengthMeters()); assertEquals(3, fish.getWeightTons()); assertEquals(false, fish.getSleeping()); assertEquals(true, fish.getHungry()); assertEquals(false, fish.getAngry()); } }java-design-patterns-1.18.0/twin/000077500000000000000000000000001322244523500166125ustar00rootroot00000000000000java-design-patterns-1.18.0/twin/.gitignore000066400000000000000000000000111322244523500205720ustar00rootroot00000000000000/target/ java-design-patterns-1.18.0/twin/README.md000066400000000000000000000011771322244523500200770ustar00rootroot00000000000000--- layout: pattern title: Twin folder: twin permalink: /patterns/twin/ categories: Creational tags: - Java - Difficulty-Intermediate --- ## Intent Twin pattern is a design pattern which provides a standard solution to simulate multiple inheritance in java ![alt text](./etc/twin.png "Twin") ## Applicability Use the Twin idiom when * to simulate multiple inheritance in a language that does not support this feature. * to avoid certain problems of multiple inheritance such as name clashes. ## Credits * [Twin – A Design Pattern for Modeling Multiple Inheritance](http://www.ssw.uni-linz.ac.at/Research/Papers/Moe99/Paper.pdf) java-design-patterns-1.18.0/twin/etc/000077500000000000000000000000001322244523500173655ustar00rootroot00000000000000java-design-patterns-1.18.0/twin/etc/twin.png000066400000000000000000000717621322244523500210710ustar00rootroot00000000000000PNG  IHDR:`sIDATx]XVр (" VVl#(b+bE {ATBN[5VTd7fsr{q{gvvfvvgogAO H A:ϟ@ N!qPҝBALT I ALT I AK|yDuf:*BC8/U`f橩ST\6ۇxt͚4~CRgAE:|r3gbG}x>{vwR<=ޝCϞ )d$u&TsZZ…#}|߼ Vcc'WRHڵlR-LFF<9\jy+'bV<i֭S9ɔ`2Ə.l-]Lo^K@&sTTlɓQyt:ARgAE:3^l$4E:o$Y3  ᇦĶi"A)S Ud=̷$c<稄f*N6FoHL }VgIL RgZHL RgZHL RgZHL RgZHL }UgĄxM yu>}TK6s?8IK+i$u&Tns%C1"k83SkǻwYf~|+47I  i3cɻ/H|1ƞZWڵQw 8Vhhoy5k&hI |)XBrJlZQzr\e3۷`iϷw<ճuz;wFxѢ8ܹzy@RgAE:/vOVqҼ39/[֦P!|!waٲlȑ5n\J"_Jtqqslgg]j/lԨmqք;6+YG73E\;wp qq(y8'3"tUwZsrj~1Y+#~{DHm[8NW ︢EMml E$>>Q(IgȨq/\ʼpa==K" [m*ep.-F77˗7ˢ4~I {vMWn'V!ްa*:qyyg+(s8_|eHL ]UgMf{FNfwןqq`Hço߾1Nyh_>)??soР:LZ۷8F1Ecf~?>kbo$3kw^&3'6;p[$J˒4~I ": J{ ?r5u /ߧ^iEN'8gPNŋ gD;ej#rieeÇ_E …_b,ڨQ 'E=v8 6 K'u&Χ/r۬~_{|?iY={O] B.yۻwK(T(==̙ߋL@-XܔdJ)qa"|yÉ޽Kq!z\㝽Ei+IRgAE:9Orw_нoI3/ݣ^İ˔˫k5sN ,^z5x, /n^@~h+ݡƒu\b n.&9"+V,@ ̦(y8 3"tX9@LvﴢUE/ˆ"͌оfH}x{E${ʔHPnDFE",ԙ@P>{.EEu?TĬ>,ԙ@P:'}Zpa]zzjppWO]LIYsܱF+W.77޽3u޹s6[͛$=~G\,[ÄnZwV#D$[ݺ)/^βkHT%|b"PTWD9kNuI 3*ۣB :3'qRUNeN>2-[ªU+@r~g6x \J9&L背QP4?w.vǎYd5Uɛò6ou j^V.ԙ@P:ΣGI{8]pUo 96Oŋb|u~63qذ,APyy5\]HeO,X8άڙUFuau޿_sukרQ~c{qu,-~t2bdV0{}y|,SgN͚8ѰauիD&hyPt^.nĂ̪ML 2tXޝ:yԚuqq`Gʕ+}Otvva M,ps疜-755q㚰 XZZ"ewO,X83@̘#l2"2?> ;7KǏw fgyu&j'I ALT I ALT I ALT I ALT I ʟ? 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.twin; /** * Twin pattern is a design pattern which provides a standard solution to simulate multiple * inheritance in java. *

    * In this example, the essence of the Twin pattern is the {@link BallItem} class and * {@link BallThread} class represent the twin objects to coordinate with each other(via the twin * reference) like a single class inheriting from {@link GameItem} and {@link Thread}. */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) throws Exception { BallItem ballItem = new BallItem(); BallThread ballThread = new BallThread(); ballItem.setTwin(ballThread); ballThread.setTwin(ballItem); ballThread.start(); waiting(); ballItem.click(); waiting(); ballItem.click(); waiting(); // exit ballThread.stopMe(); } private static void waiting() throws Exception { Thread.sleep(750); } } java-design-patterns-1.18.0/twin/src/main/java/com/iluwatar/twin/BallItem.java000066400000000000000000000037101322244523500271720ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.twin; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * This class represents a Ball which extends {@link GameItem} and implements the logic for ball * item, like move and draw. It hold a reference of {@link BallThread} to delegate the suspend and * resume task. */ public class BallItem extends GameItem { private static final Logger LOGGER = LoggerFactory.getLogger(BallItem.class); private boolean isSuspended; private BallThread twin; public void setTwin(BallThread twin) { this.twin = twin; } @Override public void doDraw() { LOGGER.info("doDraw"); } public void move() { LOGGER.info("move"); } @Override public void click() { isSuspended = !isSuspended; if (isSuspended) { twin.suspendMe(); } else { twin.resumeMe(); } } } java-design-patterns-1.18.0/twin/src/main/java/com/iluwatar/twin/BallThread.java000066400000000000000000000044221322244523500275040ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.twin; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * This class is a UI thread for drawing the {@link BallItem}, and provide the method for suspend * and resume. It hold the reference of {@link BallItem} to delegate the draw task. * */ public class BallThread extends Thread { private static final Logger LOGGER = LoggerFactory.getLogger(BallThread.class); private BallItem twin; private volatile boolean isSuspended; private volatile boolean isRunning = true; public void setTwin(BallItem twin) { this.twin = twin; } /** * Run the thread */ public void run() { while (isRunning) { if (!isSuspended) { twin.draw(); twin.move(); } try { Thread.sleep(250); } catch (InterruptedException e) { throw new RuntimeException(e); } } } public void suspendMe() { isSuspended = true; LOGGER.info("Begin to suspend BallThread"); } public void resumeMe() { isSuspended = false; LOGGER.info("Begin to resume BallThread"); } public void stopMe() { this.isRunning = false; this.isSuspended = true; } } java-design-patterns-1.18.0/twin/src/main/java/com/iluwatar/twin/GameItem.java000066400000000000000000000031511322244523500271700ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.twin; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * GameItem is a common class which provides some common methods for game object. */ public abstract class GameItem { private static final Logger LOGGER = LoggerFactory.getLogger(GameItem.class); /** * Template method, do some common logic before draw */ public void draw() { LOGGER.info("draw"); doDraw(); } public abstract void doDraw(); public abstract void click(); } java-design-patterns-1.18.0/twin/src/test/000077500000000000000000000000001322244523500203605ustar00rootroot00000000000000java-design-patterns-1.18.0/twin/src/test/java/000077500000000000000000000000001322244523500213015ustar00rootroot00000000000000java-design-patterns-1.18.0/twin/src/test/java/com/000077500000000000000000000000001322244523500220575ustar00rootroot00000000000000java-design-patterns-1.18.0/twin/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500237075ustar00rootroot00000000000000java-design-patterns-1.18.0/twin/src/test/java/com/iluwatar/twin/000077500000000000000000000000001322244523500246705ustar00rootroot00000000000000java-design-patterns-1.18.0/twin/src/test/java/com/iluwatar/twin/AppTest.java000066400000000000000000000025261322244523500271200ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.twin; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() throws Exception { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/twin/src/test/java/com/iluwatar/twin/BallItemTest.java000066400000000000000000000074221322244523500300710ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.twin; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertTrue; import static org.mockito.Mockito.inOrder; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verifyNoMoreInteractions; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import java.util.LinkedList; import java.util.List; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.mockito.InOrder; import org.slf4j.LoggerFactory; /** * Date: 12/30/15 - 18:44 PM * * @author Jeroen Meulemeester */ public class BallItemTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(); } @AfterEach public void tearDown() { appender.stop(); } @Test public void testClick() { final BallThread ballThread = mock(BallThread.class); final BallItem ballItem = new BallItem(); ballItem.setTwin(ballThread); final InOrder inOrder = inOrder(ballThread); for (int i = 0; i < 10; i++) { ballItem.click(); inOrder.verify(ballThread).suspendMe(); ballItem.click(); inOrder.verify(ballThread).resumeMe(); } inOrder.verifyNoMoreInteractions(); } @Test public void testDoDraw() { final BallItem ballItem = new BallItem(); final BallThread ballThread = mock(BallThread.class); ballItem.setTwin(ballThread); ballItem.draw(); assertTrue(appender.logContains("draw")); assertTrue(appender.logContains("doDraw")); verifyNoMoreInteractions(ballThread); assertEquals(2, appender.getLogSize()); } @Test public void testMove() { final BallItem ballItem = new BallItem(); final BallThread ballThread = mock(BallThread.class); ballItem.setTwin(ballThread); ballItem.move(); assertTrue(appender.logContains("move")); verifyNoMoreInteractions(ballThread); assertEquals(1, appender.getLogSize()); } /** * Logging Appender Implementation */ public class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender() { ((Logger) LoggerFactory.getLogger("root")).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public boolean logContains(String message) { return log.stream().anyMatch(event -> event.getMessage().equals(message)); } public int getLogSize() { return log.size(); } } } java-design-patterns-1.18.0/twin/src/test/java/com/iluwatar/twin/BallThreadTest.java000066400000000000000000000073251322244523500304040ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.twin; import org.junit.jupiter.api.Test; import static java.lang.Thread.UncaughtExceptionHandler; import static java.lang.Thread.sleep; import static java.time.Duration.ofMillis; import static org.junit.jupiter.api.Assertions.assertTimeout; import static org.mockito.Matchers.any; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.timeout; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/30/15 - 18:55 PM * * @author Jeroen Meulemeester */ public class BallThreadTest { /** * Verify if the {@link BallThread} can be resumed */ @Test public void testSuspend() throws Exception { assertTimeout(ofMillis(5000), () -> { final BallThread ballThread = new BallThread(); final BallItem ballItem = mock(BallItem.class); ballThread.setTwin(ballItem); ballThread.start(); verify(ballItem, timeout(2000).atLeastOnce()).draw(); verify(ballItem, timeout(2000).atLeastOnce()).move(); ballThread.suspendMe(); sleep(1000); ballThread.stopMe(); ballThread.join(); verifyNoMoreInteractions(ballItem); }); } /** * Verify if the {@link BallThread} can be resumed */ @Test public void testResume() throws Exception { assertTimeout(ofMillis(5000), () -> { final BallThread ballThread = new BallThread(); final BallItem ballItem = mock(BallItem.class); ballThread.setTwin(ballItem); ballThread.suspendMe(); ballThread.start(); sleep(1000); verifyZeroInteractions(ballItem); ballThread.resumeMe(); verify(ballItem, timeout(2000).atLeastOnce()).draw(); verify(ballItem, timeout(2000).atLeastOnce()).move(); ballThread.stopMe(); ballThread.join(); verifyNoMoreInteractions(ballItem); }); } /** * Verify if the {@link BallThread} is interruptible */ @Test public void testInterrupt() throws Exception { assertTimeout(ofMillis(5000), () -> { final BallThread ballThread = new BallThread(); final UncaughtExceptionHandler exceptionHandler = mock(UncaughtExceptionHandler.class); ballThread.setUncaughtExceptionHandler(exceptionHandler); ballThread.setTwin(mock(BallItem.class)); ballThread.start(); ballThread.interrupt(); ballThread.join(); verify(exceptionHandler).uncaughtException(eq(ballThread), any(RuntimeException.class)); verifyNoMoreInteractions(exceptionHandler); }); } }java-design-patterns-1.18.0/unit-of-work/000077500000000000000000000000001322244523500201725ustar00rootroot00000000000000java-design-patterns-1.18.0/unit-of-work/README.md000066400000000000000000000015321322244523500214520ustar00rootroot00000000000000--- layout: pattern title: Unit Of Work folder: unit-of-work permalink: /patterns/unit-of-work/ categories: Architectural tags: - Java - KISS - YAGNI - Difficulty-Beginner --- ## Intent When a business transaction is completed, all the these updates are sent as one big unit of work to be persisted in a database in one go so as to minimize database trips. ![alt text](etc/unit-of-work.urm.png "unit-of-work") ## Applicability Use the Unit Of Work pattern when * To optimize the time taken for database transactions. * To send changes to database as a unit of work which ensures atomicity of the transaction. * To reduce number of database calls. ## Credits * [Design Pattern - Unit Of Work Pattern](https://www.codeproject.com/Articles/581487/Unit-of-Work-Design-Pattern) * [Unit Of Work](https://martinfowler.com/eaaCatalog/unitOfWork.html) java-design-patterns-1.18.0/unit-of-work/etc/000077500000000000000000000000001322244523500207455ustar00rootroot00000000000000java-design-patterns-1.18.0/unit-of-work/etc/unit-of-work.ucls000066400000000000000000000107631322244523500242050ustar00rootroot00000000000000 java-design-patterns-1.18.0/unit-of-work/etc/unit-of-work.urm.png000066400000000000000000001175441322244523500246320ustar00rootroot00000000000000PNG  IHDR)tEXtcopyleftGenerated by http://plantuml.com09zTXtplantumlxUmK@? 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 d {ɜoI<4CW2OOsr,ysUV#!!ջ7l˖R@Jff&IB-+_q娢t9f'wWr\^5fIo=)%3%奡C9zC_Fd[ɻ㴧J-*& Ӧefo(yh^ּNog2mv_*DRщ I~,*j:0<USuu'$ĪlVhqR~|ϝgT6mh8AS#5DԔẋIEZ_iSLok3f.Ͳyr|mwâR~LaH2NHS]jwJM ɁqqZƍ )R6ez5ZT9Ѱl+-y`{57zj~JWP2i\>$7w, 4X??=2V8`b֥_/]:8rNP#߮\Y[54ע~gLLNT[[f]-YWwLҎyhGtD];Ţo/V홞u{jjJCCTt~4#">~͒0ʉKi^˫J4zl[yCOd^+߿q96oNbpT.}`ZU YIcc[XX3?$NT͐LӬzu"riﺬ.cݜ9SR^O hyhޭy~b'uzG]1|[H@45TQ )JJ8pD7N)gΜ 5=hB{>cD/\(QIyyuJg]tX|+י6aI•O0uJZRU w6-UHt[yh^<bvl.ᏤνJ*jٳc{D4C:<Ԫݒ/ C|CWQeҵY\sa@}'yhq Θ(((صkȭ@j{yhq+hީS,{L`M[/<555CмV\$WOբE3ʶJ'?~\NTPP:r Amm-=@<4F׮w\kjJ==zsћUU!!fmVl+G-y555rSNUTTtcW_C4CnT\VեI䬒-==A}ܺup"0AŅ %ezVP}[V%8{g9(]wEFYIccČ0OU(i=GHM+JbϞÇ߯k7oN>=˜#dj@Լ7dޓ2AmX{]gȍNIyJm#.nV]{o2:+8ɔ2яEER?*b'OHXzzBVXߺu'U;9'F'*pzR)/B(9Æ'%1\x9Wk;E̓LZ9US-df&)SR:8l6̣Gwe˞WEjI7.TlJi۔):"lݻߩ<{vgX>`ϤIvbqYRR}% '"gi2y\VsrsW!hypSjyx*-'͜9AFcfd5xRܾ}ʼzIuWTA'Ygg<{+DP)ʳ^tȑs14n&Kh͛Vuo(';==ᄱjey*Tw>0-m%qȎ^QzlVhq7'Sy6%M|6>Uw̙xdN@@[l<@мyM ez'(5zn?o (IԔbSbVII~~>u<8@-q9s!,A{Z_?_'ֽ.;V ZGi4)\ΜklF̓U󮯐ybS14I6Wt>ΟHj\][E2m~5{vC4 { + DELETE : String {static} + INSERT : String {static} + MODIFY : String {static} + commit() {abstract} + registerDeleted(T) {abstract} + registerModified(T) {abstract} + registerNew(T) {abstract} } class Student { - address : String - id : Integer - name : String + Student(id : Integer, name : String, address : String) + getAddress() : String + getId() : Integer + getName() : String } class StudentDatabase { + StudentDatabase() + delete(student : Student) + insert(student : Student) + modify(student : Student) } class StudentRepository { - LOGGER : Logger {static} - context : Map> - studentDatabase : StudentDatabase + StudentRepository(context : Map>, studentDatabase : StudentDatabase) + commit() - commitDelete() - commitInsert() - commitModify() - register(student : Student, operation : String) + registerDeleted(student : Student) + registerModified(student : Student) + registerNew(student : Student) } } StudentRepository --> "-studentDatabase" StudentDatabase StudentRepository ..|> IUnitOfWork @endumljava-design-patterns-1.18.0/unit-of-work/pom.xml000066400000000000000000000017371322244523500215170ustar00rootroot00000000000000 java-design-patterns com.iluwatar 1.18.0 4.0.0 unit-of-work junit junit org.junit.vintage junit-vintage-engine test org.mockito mockito-core java-design-patterns-1.18.0/unit-of-work/src/000077500000000000000000000000001322244523500207615ustar00rootroot00000000000000java-design-patterns-1.18.0/unit-of-work/src/main/000077500000000000000000000000001322244523500217055ustar00rootroot00000000000000java-design-patterns-1.18.0/unit-of-work/src/main/java/000077500000000000000000000000001322244523500226265ustar00rootroot00000000000000java-design-patterns-1.18.0/unit-of-work/src/main/java/com/000077500000000000000000000000001322244523500234045ustar00rootroot00000000000000java-design-patterns-1.18.0/unit-of-work/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500252345ustar00rootroot00000000000000java-design-patterns-1.18.0/unit-of-work/src/main/java/com/iluwatar/unitofwork/000077500000000000000000000000001322244523500274435ustar00rootroot00000000000000java-design-patterns-1.18.0/unit-of-work/src/main/java/com/iluwatar/unitofwork/App.java000066400000000000000000000037071322244523500310350ustar00rootroot00000000000000/* * The MIT License (MIT) * * Copyright (c) 2014-2017 Piyush Chaudhari * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.unitofwork; import java.util.HashMap; import java.util.List; /** * {@link App} Application for managing student data. */ public class App { /** * * @param args no argument sent */ public static void main(String[] args) { Student ram = new Student(1, "Ram", "Street 9, Cupertino"); Student shyam = new Student(2, "Shyam", "Z bridge, Pune"); Student gopi = new Student(3, "Gopi", "Street 10, Mumbai"); HashMap> context = new HashMap<>(); StudentDatabase studentDatabase = new StudentDatabase(); StudentRepository studentRepository = new StudentRepository(context, studentDatabase); studentRepository.registerNew(ram); studentRepository.registerModified(shyam); studentRepository.registerDeleted(gopi); studentRepository.commit(); } } java-design-patterns-1.18.0/unit-of-work/src/main/java/com/iluwatar/unitofwork/IUnitOfWork.java000066400000000000000000000035411322244523500324710ustar00rootroot00000000000000/* * The MIT License (MIT) * * Copyright (c) 2014-2017 Piyush Chaudhari * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.unitofwork; /** * @param Any generic entity */ public interface IUnitOfWork { String INSERT = "INSERT"; String DELETE = "DELETE"; String MODIFY = "MODIFY"; /** * Any register new operation occurring on UnitOfWork is only going to be performed on commit. */ void registerNew(T entity); /** * Any register modify operation occurring on UnitOfWork is only going to be performed on commit. */ void registerModified(T entity); /** * Any register delete operation occurring on UnitOfWork is only going to be performed on commit. */ void registerDeleted(T entity); /*** * All UnitOfWork operations batched together executed in commit only. */ void commit(); }java-design-patterns-1.18.0/unit-of-work/src/main/java/com/iluwatar/unitofwork/Student.java000066400000000000000000000033331322244523500317360ustar00rootroot00000000000000/* * The MIT License (MIT) * * Copyright (c) 2014-2017 Piyush Chaudhari * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.unitofwork; /** * {@link Student} is an entity. */ public class Student { private final Integer id; private final String name; private final String address; /** * @param id student unique id * @param name name of student * @param address address of student */ public Student(Integer id, String name, String address) { this.id = id; this.name = name; this.address = address; } public String getName() { return name; } public Integer getId() { return id; } public String getAddress() { return address; } } java-design-patterns-1.18.0/unit-of-work/src/main/java/com/iluwatar/unitofwork/StudentDatabase.java000066400000000000000000000027271322244523500333710ustar00rootroot00000000000000/* * The MIT License (MIT) * * Copyright (c) 2014-2017 Piyush Chaudhari * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.unitofwork; /** * Act as Database for student records. */ public class StudentDatabase { public void insert(Student student) { //Some insert logic to DB } public void modify(Student student) { //Some modify logic to DB } public void delete(Student student) { //Some delete logic to DB } } StudentRepository.java000066400000000000000000000101061322244523500337530ustar00rootroot00000000000000java-design-patterns-1.18.0/unit-of-work/src/main/java/com/iluwatar/unitofwork/* * The MIT License (MIT) * * Copyright (c) 2014-2017 Piyush Chaudhari * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.unitofwork; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.ArrayList; import java.util.List; import java.util.Map; /** * {@link StudentRepository} Student database repository. * supports unit of work for student data. */ public class StudentRepository implements IUnitOfWork { private static final Logger LOGGER = LoggerFactory.getLogger(StudentRepository.class); private Map> context; private StudentDatabase studentDatabase; /** * @param context set of operations to be perform during commit. * @param studentDatabase Database for student records. */ public StudentRepository(Map> context, StudentDatabase studentDatabase) { this.context = context; this.studentDatabase = studentDatabase; } @Override public void registerNew(Student student) { LOGGER.info("Registering {} for insert in context.", student.getName()); register(student, IUnitOfWork.INSERT); } @Override public void registerModified(Student student) { LOGGER.info("Registering {} for modify in context.", student.getName()); register(student, IUnitOfWork.MODIFY); } @Override public void registerDeleted(Student student) { LOGGER.info("Registering {} for delete in context.", student.getName()); register(student, IUnitOfWork.DELETE); } private void register(Student student, String operation) { List studentsToOperate = context.get(operation); if (studentsToOperate == null) { studentsToOperate = new ArrayList<>(); } studentsToOperate.add(student); context.put(operation, studentsToOperate); } /** * All UnitOfWork operations are batched and executed together on commit only. */ @Override public void commit() { if (context == null || context.size() == 0) { return; } LOGGER.info("Commit started"); if (context.containsKey(IUnitOfWork.INSERT)) { commitInsert(); } if (context.containsKey(IUnitOfWork.MODIFY)) { commitModify(); } if (context.containsKey(IUnitOfWork.DELETE)) { commitDelete(); } LOGGER.info("Commit finished."); } private void commitInsert() { List studentsToBeInserted = context.get(IUnitOfWork.INSERT); for (Student student : studentsToBeInserted) { LOGGER.info("Saving {} to database.", student.getName()); studentDatabase.insert(student); } } private void commitModify() { List modifiedStudents = context.get(IUnitOfWork.MODIFY); for (Student student : modifiedStudents) { LOGGER.info("Modifying {} to database.", student.getName()); studentDatabase.modify(student); } } private void commitDelete() { List deletedStudents = context.get(IUnitOfWork.DELETE); for (Student student : deletedStudents) { LOGGER.info("Deleting {} to database.", student.getName()); studentDatabase.delete(student); } } } java-design-patterns-1.18.0/unit-of-work/src/test/000077500000000000000000000000001322244523500217405ustar00rootroot00000000000000java-design-patterns-1.18.0/unit-of-work/src/test/java/000077500000000000000000000000001322244523500226615ustar00rootroot00000000000000java-design-patterns-1.18.0/unit-of-work/src/test/java/com/000077500000000000000000000000001322244523500234375ustar00rootroot00000000000000java-design-patterns-1.18.0/unit-of-work/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500252675ustar00rootroot00000000000000java-design-patterns-1.18.0/unit-of-work/src/test/java/com/iluwatar/unitofwork/000077500000000000000000000000001322244523500274765ustar00rootroot00000000000000java-design-patterns-1.18.0/unit-of-work/src/test/java/com/iluwatar/unitofwork/AppTest.java000066400000000000000000000025501322244523500317230ustar00rootroot00000000000000/* * The MIT License (MIT) * * Copyright (c) 2014-2017 Piyush Chaudhari * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.unitofwork; import org.junit.Test; import java.io.IOException; /** * AppTest */ public class AppTest { @Test public void test() throws IOException { String[] args = {}; App.main(args); } } StudentRepositoryTest.java000066400000000000000000000116471322244523500346610ustar00rootroot00000000000000java-design-patterns-1.18.0/unit-of-work/src/test/java/com/iluwatar/unitofwork/* * The MIT License (MIT) * * Copyright (c) 2014-2017 Piyush Chaudhari * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.iluwatar.unitofwork; import org.junit.Before; import org.junit.Test; import org.junit.runner.RunWith; import org.mockito.Mock; import org.mockito.runners.MockitoJUnitRunner; import java.util.Collections; import java.util.HashMap; import java.util.List; import java.util.Map; import static org.junit.Assert.assertEquals; import static org.mockito.Mockito.*; /** * tests {@link StudentRepository} */ @RunWith(MockitoJUnitRunner.class) public class StudentRepositoryTest { private final Student student1 = new Student(1, "Ram", "street 9, cupertino"); private final Student student2 = new Student(1, "Sham", "Z bridge, pune"); private Map> context; @Mock private StudentDatabase studentDatabase; private StudentRepository studentRepository; @Before public void setUp() throws Exception { context = new HashMap<>(); studentRepository = new StudentRepository(context, studentDatabase); } @Test public void shouldSaveNewStudentWithoutWritingToDb() throws Exception { studentRepository.registerNew(student1); studentRepository.registerNew(student2); assertEquals(2, context.get(IUnitOfWork.INSERT).size()); verifyNoMoreInteractions(studentDatabase); } @Test public void shouldSaveDeletedStudentWithoutWritingToDb() throws Exception { studentRepository.registerDeleted(student1); studentRepository.registerDeleted(student2); assertEquals(2, context.get(IUnitOfWork.DELETE).size()); verifyNoMoreInteractions(studentDatabase); } @Test public void shouldSaveModifiedStudentWithoutWritingToDb() throws Exception { studentRepository.registerModified(student1); studentRepository.registerModified(student2); assertEquals(2, context.get(IUnitOfWork.MODIFY).size()); verifyNoMoreInteractions(studentDatabase); } @Test public void shouldSaveAllLocalChangesToDb() throws Exception { context.put(IUnitOfWork.INSERT, Collections.singletonList(student1)); context.put(IUnitOfWork.MODIFY, Collections.singletonList(student1)); context.put(IUnitOfWork.DELETE, Collections.singletonList(student1)); studentRepository.commit(); verify(studentDatabase, times(1)).insert(student1); verify(studentDatabase, times(1)).modify(student1); verify(studentDatabase, times(1)).delete(student1); } @Test public void shouldNotWriteToDbIfContextIsNull() throws Exception { StudentRepository studentRepository = new StudentRepository(null, studentDatabase); studentRepository.commit(); verifyNoMoreInteractions(studentDatabase); } @Test public void shouldNotWriteToDbIfNothingToCommit() throws Exception { StudentRepository studentRepository = new StudentRepository(new HashMap<>(), studentDatabase); studentRepository.commit(); verifyZeroInteractions(studentDatabase); } @Test public void shouldNotInsertToDbIfNoRegisteredStudentsToBeCommitted() throws Exception { context.put(IUnitOfWork.MODIFY, Collections.singletonList(student1)); context.put(IUnitOfWork.DELETE, Collections.singletonList(student1)); studentRepository.commit(); verify(studentDatabase, never()).insert(student1); } @Test public void shouldNotModifyToDbIfNotRegisteredStudentsToBeCommitted() throws Exception { context.put(IUnitOfWork.INSERT, Collections.singletonList(student1)); context.put(IUnitOfWork.DELETE, Collections.singletonList(student1)); studentRepository.commit(); verify(studentDatabase, never()).modify(student1); } @Test public void shouldNotDeleteFromDbIfNotRegisteredStudentsToBeCommitted() throws Exception { context.put(IUnitOfWork.INSERT, Collections.singletonList(student1)); context.put(IUnitOfWork.MODIFY, Collections.singletonList(student1)); studentRepository.commit(); verify(studentDatabase, never()).delete(student1); } }java-design-patterns-1.18.0/update-ghpages.sh000066400000000000000000000032661322244523500210720ustar00rootroot00000000000000#!/bin/bash # # The MIT License # Copyright (c) 2014-2016 Ilkka Seppälä # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. # # Clone gh-pages git clone -b gh-pages "https://${GH_REF}" ghpagesclone cd ghpagesclone # Init and update submodule to latest git submodule update --init --recursive git submodule update --remote # Setup Git git config user.name "Travis-CI" git config user.email "travis@no.reply" # If there is a new version of the master branch if git status | grep patterns > /dev/null 2>&1 then # it should be committed git add . git commit -m ":sparkles: :up: Automagic Update via Travis-CI" git push --quiet "https://${GH_TOKEN}:x-oauth-basic@${GH_REF}" gh-pages > /dev/null 2>&1 fi java-design-patterns-1.18.0/value-object/000077500000000000000000000000001322244523500202115ustar00rootroot00000000000000java-design-patterns-1.18.0/value-object/README.md000066400000000000000000000021621322244523500214710ustar00rootroot00000000000000--- layout: pattern title: Value Object folder: value-object permalink: /patterns/value-object/ categories: Creational tags: - Java - Difficulty-Beginner --- ## Intent Provide objects which follow value semantics rather than reference semantics. This means value objects' equality are not based on identity. Two value objects are equal when they have the same value, not necessarily being the same object. ![alt text](./etc/value-object.png "Value Object") ## Applicability Use the Value Object when * you need to measure the objects' equality based on the objects' value ## Real world examples * [java.util.Optional](https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html) * [java.time.LocalDate](https://docs.oracle.com/javase/8/docs/api/java/time/LocalDate.html) * [joda-time, money, beans](http://www.joda.org/) ## Credits * [Patterns of Enterprise Application Architecture](http://www.martinfowler.com/books/eaa.html) * [VALJOs - Value Java Objects : Stephen Colebourne's blog](http://blog.joda.org/2014/03/valjos-value-java-objects.html) * [Value Object : Wikipedia](https://en.wikipedia.org/wiki/Value_object) java-design-patterns-1.18.0/value-object/etc/000077500000000000000000000000001322244523500207645ustar00rootroot00000000000000java-design-patterns-1.18.0/value-object/etc/value-object.png000066400000000000000000000116411322244523500240550ustar00rootroot00000000000000PNG  IHDR hIDATxmEO4~$W?Ac ȍhJZ.%MI%pbJ!sH ossޙ}y;ӛЂ`}TftW{tha@"3 残0aF!ŒB-<:;ugkh} fd DŽ:ɥH3IeD_g'ɿZ!x<K\'0֌z%b!A*HYh3I#3-DbqE9=o1K/Q?i1WsF޺#fk3WΚce0yh+m2++fgY1<sT*Ơ?;4F٤1gY4-Iꥹ͞\36T]F}!Q519sMc*̤"(DQ0aF!ŒB|>veWܷ}fkj?wyɟnrswbk?Vs_p䎧xwFUGۖ)ÞE9He|R-bB' \efC[D]^ |f+Ӣ.fy}p"Qf,G7o8x?؋o=c{4G]Ga[1q쌈,uD AMǼb5vT|c?tӟ7&l`i20KÎhF j3olAݫ;aw{,ͯ{;1.\zΕv>w2$%9Rbf\fk"G!yjwvrh;} ]lL8G od,7Rj AJ6bP/ k3a/v]M>$xz땟=gnZ3/ g1rFj =E_MW_y`wfS߾ kL'+Yݕ}^a 0GϾcŚkٸF}fk$ځyWߴuw5{͐s5Iӈ0aF!ŒB3 5h.ziKf~)_G٘*AW#抏?R'3ל^ȘLپY$6ܽ¶i۳_`Jhujr6a.s)]ae>G~_G&.U䠆c6"R10aF!ŒBA!rGP#(TBm.ِ{%pF`2=Qfs3ԴB%G\<`BF-MYf\(M&%G2=(tr$P3yFL&Gң6߈-6eJݰTv`}#Mc s{$lF;$HE =i;T4`54?tAj,fTc1|0aF!ŒBBi<`&HsC&HUBmv LQ:,oSݍ7sHRAdq#٭Q07 s$ m`p}Lj3 f"(DQ0aF!3Mر&D5DQhz̓|^ﵟ Դ?wUx{هχX?%)ŒB%4r4:L2DoW8r}lG0/Od ?+SXNbbl ,Ӥ6!b".qvyz;׹=d_>v`{YlF83oCm,GRyc ?f镜F_)|df(?e0n)YoSF2!1R\LhT^SS쪭Oo~j5e'1K\4j'̞1 LK1Som/ VP]9f|7N>t,&$e@xcFqn2TL*>YO.<-~j? :3Ѩ=e~PBηáឲ#0aF!ŒBBtdbI p+PY4Ĝ,I5(3_r4I4Sqh|pYg ޛsvwiAhy&;FjwLy~ݓcX?5*w4Ϫ#u:41 p|s}bSH}e+-ˊ&=PdH.)0~쎗w<3h'Vj%7lL\07JPf̧Y{oyP+[ wL=1b2+n0W㢙C\/,>p‡J#%{ci^7163M&N`tԫ/.޸=}`_d  0D>ߢrkc#X).03̯TCJJETLc$ELJaF!/?GK CP:fREQ0aF!ŒBua#ٛtd?lG X㎘fG HE[Rn̚{}tn#JdrHwG _s7Փ}H؃ʇ="-5-Қ̈o|*]鰴\ʇ=}⿄`؈clW}.+f'9 u#+f7r,Ya]B6XiaBGHW`09#.L/ߵ),4AJjnU^pw=!8f"(DQ0aF!ŒBœaH믐 +^äf8RU8]&1Iwh v-V1_z[M I># [^V0J𘹺0ɇٿ{$3kkC;UacKK0w`fbc5\.(0wd-ofj^m䓎8Lr?yv845a IY=R;0)3q"(DQ0aF!ŒB3 Յ9=*(W<*#5xܘK{%Ɛ]x4sY x4sYt`9zؕS0gc ׌8KsY 6 hM#]x4 ܠSQ.Mgcyw ̓fG:(OpǣGyjL̴Ӗ)|M3qsq̖֍\#i%aӺ=h皧jhue*=JËuk֔Grv.)U"HsL֔#5GL*"ŒB3 f"(DQ0P '"N=|lX'="K_xzzqN=M <׈j*K\jǃXG [޳>8I9repEKi\(n$eGࡀ8@̆UA68L[#0"cH Sr,bG"#f xkx^x(dF;e~v؆7ٌDW3ȡ{ kwNIj{$pN $0caF!ŒB3 f"(DQS؃]C.''oHEϥ!KB#`g9rG)"P;L4DC'",^15zc>花w͑O*Ɯo9,^lό.Q#g"Gв8Kiqm>siQ҆Z]4iV=b7qzYi𾛆Y.n@жlavZT=b7R1U@>Fۆ9XR.fmig]fWfbP~$:3QZ3#%85jݲ{m t5c䛹xS Z.>=0INXV)UHG0sxuֳd:d+{?i3)yW+}/]Q;>1jaF!ŒB3 ,9GKLKŒb!(|dIENDB`java-design-patterns-1.18.0/value-object/etc/value-object.ucls000066400000000000000000000026121322244523500242350ustar00rootroot00000000000000 java-design-patterns-1.18.0/value-object/pom.xml000066400000000000000000000042441322244523500215320ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.18.0 value-object com.google.guava guava-testlib 19.0 test org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test org.mockito mockito-core test java-design-patterns-1.18.0/value-object/src/000077500000000000000000000000001322244523500210005ustar00rootroot00000000000000java-design-patterns-1.18.0/value-object/src/main/000077500000000000000000000000001322244523500217245ustar00rootroot00000000000000java-design-patterns-1.18.0/value-object/src/main/java/000077500000000000000000000000001322244523500226455ustar00rootroot00000000000000java-design-patterns-1.18.0/value-object/src/main/java/com/000077500000000000000000000000001322244523500234235ustar00rootroot00000000000000java-design-patterns-1.18.0/value-object/src/main/java/com/iluwatar/000077500000000000000000000000001322244523500252535ustar00rootroot00000000000000java-design-patterns-1.18.0/value-object/src/main/java/com/iluwatar/value/000077500000000000000000000000001322244523500263675ustar00rootroot00000000000000java-design-patterns-1.18.0/value-object/src/main/java/com/iluwatar/value/object/000077500000000000000000000000001322244523500276355ustar00rootroot00000000000000java-design-patterns-1.18.0/value-object/src/main/java/com/iluwatar/value/object/App.java000066400000000000000000000052031322244523500312200ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.value.object; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * A Value Object are objects which follow value semantics rather than reference semantics. This * means value objects' equality are not based on identity. Two value objects are equal when they * have the same value, not necessarily being the same object.. * * Value Objects must override equals(), hashCode() to check the equality with values. * Value Objects should be immutable so declare members final. * Obtain instances by static factory methods. * The elements of the state must be other values, including primitive types. * Provide methods, typically simple getters, to get the elements of the state. * A Value Object must check equality with equals() not == * * For more specific and strict rules to implement value objects check the rules from Stephen * Colebourne's term VALJO : http://blog.joda.org/2014/03/valjos-value-java-objects.html */ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * This practice creates three HeroStats(Value object) and checks equality between those. */ public static void main(String[] args) { HeroStat statA = HeroStat.valueOf(10, 5, 0); HeroStat statB = HeroStat.valueOf(10, 5, 0); HeroStat statC = HeroStat.valueOf(5, 1, 8); LOGGER.info(statA.toString()); LOGGER.info("Is statA and statB equal : {}", statA.equals(statB)); LOGGER.info("Is statA and statC equal : {}", statA.equals(statC)); } } java-design-patterns-1.18.0/value-object/src/main/java/com/iluwatar/value/object/HeroStat.java000066400000000000000000000061511322244523500322340ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.value.object; /** * HeroStat is a value object * * {@link http://docs.oracle.com/javase/8/docs/api/java/lang/doc-files/ValueBased.html} */ public class HeroStat { // Stats for a hero private final int strength; private final int intelligence; private final int luck; // All constructors must be private. private HeroStat(int strength, int intelligence, int luck) { super(); this.strength = strength; this.intelligence = intelligence; this.luck = luck; } // Static factory method to create new instances. public static HeroStat valueOf(int strength, int intelligence, int luck) { return new HeroStat(strength, intelligence, luck); } public int getStrength() { return strength; } public int getIntelligence() { return intelligence; } public int getLuck() { return luck; } /* * Recommended to provide a static factory method capable of creating an instance from the formal * string representation declared like this. public static HeroStat parse(String string) {} */ // toString, hashCode, equals @Override public String toString() { return "HeroStat [strength=" + strength + ", intelligence=" + intelligence + ", luck=" + luck + "]"; } @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + intelligence; result = prime * result + luck; result = prime * result + strength; return result; } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (obj == null) { return false; } if (getClass() != obj.getClass()) { return false; } HeroStat other = (HeroStat) obj; if (intelligence != other.intelligence) { return false; } if (luck != other.luck) { return false; } if (strength != other.strength) { return false; } return true; } // The clone() method should not be public. Just don't override it. } java-design-patterns-1.18.0/value-object/src/test/000077500000000000000000000000001322244523500217575ustar00rootroot00000000000000java-design-patterns-1.18.0/value-object/src/test/java/000077500000000000000000000000001322244523500227005ustar00rootroot00000000000000java-design-patterns-1.18.0/value-object/src/test/java/com/000077500000000000000000000000001322244523500234565ustar00rootroot00000000000000java-design-patterns-1.18.0/value-object/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500253065ustar00rootroot00000000000000java-design-patterns-1.18.0/value-object/src/test/java/com/iluwatar/value/000077500000000000000000000000001322244523500264225ustar00rootroot00000000000000java-design-patterns-1.18.0/value-object/src/test/java/com/iluwatar/value/object/000077500000000000000000000000001322244523500276705ustar00rootroot00000000000000java-design-patterns-1.18.0/value-object/src/test/java/com/iluwatar/value/object/AppTest.java000066400000000000000000000025061322244523500321160ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.value.object; import org.junit.jupiter.api.Test; /** * Application test */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/value-object/src/test/java/com/iluwatar/value/object/HeroStatTest.java000066400000000000000000000045061322244523500331310ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.value.object; import com.google.common.testing.EqualsTester; import org.junit.jupiter.api.Test; import static org.hamcrest.CoreMatchers.is; import static org.hamcrest.CoreMatchers.not; import static org.junit.Assert.assertThat; /** * Unit test for HeroStat. */ public class HeroStatTest { /** * Tester for equals() and hashCode() methods of a class. Using guava's EqualsTester. * * @see http://static.javadoc.io/com.google.guava/guava-testlib/19.0/com/google/common/testing/ * EqualsTester.html */ @Test public void testEquals() { HeroStat heroStatA = HeroStat.valueOf(3, 9, 2); HeroStat heroStatB = HeroStat.valueOf(3, 9, 2); new EqualsTester().addEqualityGroup(heroStatA, heroStatB).testEquals(); } /** * The toString() for two equal values must be the same. For two non-equal values it must be * different. */ @Test public void testToString() { HeroStat heroStatA = HeroStat.valueOf(3, 9, 2); HeroStat heroStatB = HeroStat.valueOf(3, 9, 2); HeroStat heroStatC = HeroStat.valueOf(3, 9, 8); assertThat(heroStatA.toString(), is(heroStatB.toString())); assertThat(heroStatA.toString(), is(not(heroStatC.toString()))); } } java-design-patterns-1.18.0/visitor/000077500000000000000000000000001322244523500173305ustar00rootroot00000000000000java-design-patterns-1.18.0/visitor/README.md000066400000000000000000000045051322244523500206130ustar00rootroot00000000000000--- layout: pattern title: Visitor folder: visitor permalink: /patterns/visitor/ categories: Behavioral tags: - Java - Difficulty-Intermediate - Gang Of Four --- ## Intent Represent an operation to be performed on the elements of an object structure. Visitor lets you define a new operation without changing the classes of the elements on which it operates. ![alt text](./etc/visitor_1.png "Visitor") ## Applicability Use the Visitor pattern when * an object structure contains many classes of objects with differing interfaces, and you want to perform operations on these objects that depend on their concrete classes * many distinct and unrelated operations need to be performed on objects in an object structure, and you want to avoid "polluting" their classes with these operations. Visitor lets you keep related operations together by defining them in one class. When the object structure is shared by many applications, use Visitor to put operations in just those applications that need them * the classes defining the object structure rarely change, but you often want to define new operations over the structure. Changing the object structure classes requires redefining the interface to all visitors, which is potentially costly. If the object structure classes change often, then it's probably better to define the operations in those classes ## Real world examples * [Apache Wicket](https://github.com/apache/wicket) component tree, see [MarkupContainer](https://github.com/apache/wicket/blob/b60ec64d0b50a611a9549809c9ab216f0ffa3ae3/wicket-core/src/main/java/org/apache/wicket/MarkupContainer.java) * [javax.lang.model.element.AnnotationValue](http://docs.oracle.com/javase/8/docs/api/javax/lang/model/element/AnnotationValue.html) and [AnnotationValueVisitor](http://docs.oracle.com/javase/8/docs/api/javax/lang/model/element/AnnotationValueVisitor.html) * [javax.lang.model.element.Element](http://docs.oracle.com/javase/8/docs/api/javax/lang/model/element/Element.html) and [Element Visitor](http://docs.oracle.com/javase/8/docs/api/javax/lang/model/element/ElementVisitor.html) * [java.nio.file.FileVisitor](http://docs.oracle.com/javase/8/docs/api/java/nio/file/FileVisitor.html) ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.18.0/visitor/etc/000077500000000000000000000000001322244523500201035ustar00rootroot00000000000000java-design-patterns-1.18.0/visitor/etc/visitor.png000066400000000000000000000544061322244523500223210ustar00rootroot00000000000000PNG  IHDR?8ӖXIDATxl%}M# B pm@P,QhUL9 ĭ$f%ܸMYvLRޥײdu P`S Zl\ `ϝ̜uw|< sΜeh%  L8^ L8^ L8^ L8^G㳗ر}h @ 5Ө#&5qQ؁Ib?^Lۯ{l,V[>*FMa7qĨ#&LQgv7z[kg@"8 GԄ8qDMGё~/{9m̵Vz بL?@D-) ]lL4<#dQ-GQ+DQQ\d#ߦ.,uiz}mԽt(ۉvel@44∌$8"c}%YgG،5ȉd/I## Q ]֡lo>dRPCI^ +s=׮>ݏ*_^QG9Qo Jȉe/PpdNX7K9Ȑ[=OON2]UfOʮ0fi^9b?YlPG|KuJ6Oڦ/&:o+Ozvx?ߢ O>=kscYw#ud9Q8٧`Kȉe/E܇4Ew+lfuުX5dNn]9ɘBmttlLG|}/#yCjﾷowa,O~w'ħ0oW\w_#cmg9Q쥠yj82mFYc=蟋wi#ghIO髳L2 |r͜9ۏ2y :YؤǦ939r e/Ⱦ/Q4p[nw|7^~s:_/?[|4YI?,YU|K9Q쥨S]jݦWnx't\WZ,Ӳ b#+DF="10Qb&8€S]/v>J1~;Y{?9q'_,|4+ANL+QT '*s`?1 }b}ޑu#}?|3&іv6˴fӠU)p4%.`%69h# j>Ԏ^'&:s?٧>1jG|g?I-a#3 |XLyY@NT5{9(@XYR3iYfᲱ C-8<؏ g/ f+vfm# #qh5ladtuf0׌8B8'ً {V B8B8'ً {V B8B8'ً {V B8B8'ً {V B8B8'ً {V B8B8'ً {V B8B8"';o v_R ~ 3 PITqGXIMkQHb?^|f*8&#lbިuY\NH㽀 ^[^tm-bKW;_Y:n)yW*C1M~Qj$*^>*U3 8G8GTx|t۾ W__yY|{es=XR5~W b:E"Pi8~CG"T#DRQnmPYi8G8RЌWMeYO)q=ȻF.UYȎ-(E؏0DQ[>5Ӱ#pЊ! 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.visitor; /** * * Visitor pattern defines mechanism to apply operations on nodes in hierarchy. New operations can * be added without altering the node interface. *

    * In this example there is a unit hierarchy beginning from {@link Commander}. This hierarchy is * traversed by visitors. {@link SoldierVisitor} applies its operation on {@link Soldier}s, * {@link SergeantVisitor} on {@link Sergeant}s and so on. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { Commander commander = new Commander(new Sergeant(new Soldier(), new Soldier(), new Soldier()), new Sergeant( new Soldier(), new Soldier(), new Soldier())); commander.accept(new SoldierVisitor()); commander.accept(new SergeantVisitor()); commander.accept(new CommanderVisitor()); } } java-design-patterns-1.18.0/visitor/src/main/java/com/iluwatar/visitor/Commander.java000066400000000000000000000030131322244523500306360ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.visitor; /** * * Commander * */ public class Commander extends Unit { public Commander(Unit... children) { super(children); } @Override public void accept(UnitVisitor visitor) { visitor.visitCommander(this); super.accept(visitor); } @Override public String toString() { return "commander"; } } java-design-patterns-1.18.0/visitor/src/main/java/com/iluwatar/visitor/CommanderVisitor.java000066400000000000000000000033261322244523500322250ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.visitor; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * CommanderVisitor * */ public class CommanderVisitor implements UnitVisitor { private static final Logger LOGGER = LoggerFactory.getLogger(CommanderVisitor.class); @Override public void visitSoldier(Soldier soldier) { // Do nothing } @Override public void visitSergeant(Sergeant sergeant) { // Do nothing } @Override public void visitCommander(Commander commander) { LOGGER.info("Good to see you {}", commander); } } java-design-patterns-1.18.0/visitor/src/main/java/com/iluwatar/visitor/Sergeant.java000066400000000000000000000030061322244523500305030ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.visitor; /** * * Sergeant * */ public class Sergeant extends Unit { public Sergeant(Unit... children) { super(children); } @Override public void accept(UnitVisitor visitor) { visitor.visitSergeant(this); super.accept(visitor); } @Override public String toString() { return "sergeant"; } } java-design-patterns-1.18.0/visitor/src/main/java/com/iluwatar/visitor/SergeantVisitor.java000066400000000000000000000033101322244523500320610ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.visitor; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * SergeantVisitor * */ public class SergeantVisitor implements UnitVisitor { private static final Logger LOGGER = LoggerFactory.getLogger(SergeantVisitor.class); @Override public void visitSoldier(Soldier soldier) { // Do nothing } @Override public void visitSergeant(Sergeant sergeant) { LOGGER.info("Hello {}", sergeant); } @Override public void visitCommander(Commander commander) { // Do nothing } } java-design-patterns-1.18.0/visitor/src/main/java/com/iluwatar/visitor/Soldier.java000066400000000000000000000030011322244523500303270ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.visitor; /** * * Soldier * */ public class Soldier extends Unit { public Soldier(Unit... children) { super(children); } @Override public void accept(UnitVisitor visitor) { visitor.visitSoldier(this); super.accept(visitor); } @Override public String toString() { return "soldier"; } } java-design-patterns-1.18.0/visitor/src/main/java/com/iluwatar/visitor/SoldierVisitor.java000066400000000000000000000033101322244523500317120ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.visitor; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * SoldierVisitor * */ public class SoldierVisitor implements UnitVisitor { private static final Logger LOGGER = LoggerFactory.getLogger(SoldierVisitor.class); @Override public void visitSoldier(Soldier soldier) { LOGGER.info("Greetings {}", soldier); } @Override public void visitSergeant(Sergeant sergeant) { // Do nothing } @Override public void visitCommander(Commander commander) { // Do nothing } } java-design-patterns-1.18.0/visitor/src/main/java/com/iluwatar/visitor/Unit.java000066400000000000000000000030251322244523500276530ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.visitor; /** * * Interface for the nodes in hierarchy. * */ public abstract class Unit { private Unit[] children; public Unit(Unit... children) { this.children = children; } /** * Accept visitor */ public void accept(UnitVisitor visitor) { for (Unit child : children) { child.accept(visitor); } } } java-design-patterns-1.18.0/visitor/src/main/java/com/iluwatar/visitor/UnitVisitor.java000066400000000000000000000026041322244523500312350ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.visitor; /** * * Visitor interface. * */ public interface UnitVisitor { void visitSoldier(Soldier soldier); void visitSergeant(Sergeant sergeant); void visitCommander(Commander commander); } java-design-patterns-1.18.0/visitor/src/test/000077500000000000000000000000001322244523500210765ustar00rootroot00000000000000java-design-patterns-1.18.0/visitor/src/test/java/000077500000000000000000000000001322244523500220175ustar00rootroot00000000000000java-design-patterns-1.18.0/visitor/src/test/java/com/000077500000000000000000000000001322244523500225755ustar00rootroot00000000000000java-design-patterns-1.18.0/visitor/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500244255ustar00rootroot00000000000000java-design-patterns-1.18.0/visitor/src/test/java/com/iluwatar/visitor/000077500000000000000000000000001322244523500261245ustar00rootroot00000000000000java-design-patterns-1.18.0/visitor/src/test/java/com/iluwatar/visitor/AppTest.java000066400000000000000000000025101322244523500303450ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.visitor; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/visitor/src/test/java/com/iluwatar/visitor/CommanderTest.java000066400000000000000000000031701322244523500315350ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.visitor; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.verify; /** * Date: 12/30/15 - 19:45 PM * * @author Jeroen Meulemeester */ public class CommanderTest extends UnitTest { /** * Create a new test instance for the given {@link Commander} */ public CommanderTest() { super(Commander::new); } @Override void verifyVisit(Commander unit, UnitVisitor mockedVisitor) { verify(mockedVisitor).visitCommander(eq(unit)); } }java-design-patterns-1.18.0/visitor/src/test/java/com/iluwatar/visitor/CommanderVisitorTest.java000066400000000000000000000031101322244523500331070ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.visitor; import java.util.Optional; /** * Date: 12/30/15 - 18:43 PM * * @author Jeroen Meulemeester */ public class CommanderVisitorTest extends VisitorTest { /** * Create a new test instance for the given visitor */ public CommanderVisitorTest() { super( new CommanderVisitor(), Optional.of("Good to see you commander"), Optional.empty(), Optional.empty() ); } } java-design-patterns-1.18.0/visitor/src/test/java/com/iluwatar/visitor/SergeantTest.java000066400000000000000000000031611322244523500314000ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.visitor; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.verify; /** * Date: 12/30/15 - 19:45 PM * * @author Jeroen Meulemeester */ public class SergeantTest extends UnitTest { /** * Create a new test instance for the given {@link Sergeant} */ public SergeantTest() { super(Sergeant::new); } @Override void verifyVisit(Sergeant unit, UnitVisitor mockedVisitor) { verify(mockedVisitor).visitSergeant(eq(unit)); } }java-design-patterns-1.18.0/visitor/src/test/java/com/iluwatar/visitor/SergeantVisitorTest.java000066400000000000000000000030711322244523500327600ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.visitor; import java.util.Optional; /** * Date: 12/30/15 - 18:36 PM * * @author Jeroen Meulemeester */ public class SergeantVisitorTest extends VisitorTest { /** * Create a new test instance for the given visitor */ public SergeantVisitorTest() { super( new SergeantVisitor(), Optional.empty(), Optional.of("Hello sergeant"), Optional.empty() ); } } java-design-patterns-1.18.0/visitor/src/test/java/com/iluwatar/visitor/SoldierTest.java000066400000000000000000000031521322244523500312310ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.visitor; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.verify; /** * Date: 12/30/15 - 19:45 PM * * @author Jeroen Meulemeester */ public class SoldierTest extends UnitTest { /** * Create a new test instance for the given {@link Soldier} */ public SoldierTest() { super(Soldier::new); } @Override void verifyVisit(Soldier unit, UnitVisitor mockedVisitor) { verify(mockedVisitor).visitSoldier(eq(unit)); } }java-design-patterns-1.18.0/visitor/src/test/java/com/iluwatar/visitor/SoldierVisitorTest.java000066400000000000000000000030701322244523500326100ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.visitor; import java.util.Optional; /** * Date: 12/30/15 - 18:59 PM * * @author Jeroen Meulemeester */ public class SoldierVisitorTest extends VisitorTest { /** * Create a new test instance for the given visitor */ public SoldierVisitorTest() { super( new SoldierVisitor(), Optional.empty(), Optional.empty(), Optional.of("Greetings soldier") ); } } java-design-patterns-1.18.0/visitor/src/test/java/com/iluwatar/visitor/UnitTest.java000066400000000000000000000053741322244523500305570ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.visitor; import org.junit.jupiter.api.Test; import java.util.Arrays; import java.util.function.Function; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/30/15 - 18:59 PM * Test related to Units * @param Type of Unit * @author Jeroen Meulemeester */ public abstract class UnitTest { /** * Factory to create new instances of the tested unit */ private final Function factory; /** * Create a new test instance for the given unit type {@link U} * * @param factory Factory to create new instances of the tested unit */ public UnitTest(final Function factory) { this.factory = factory; } @Test public void testAccept() throws Exception { final Unit[] children = new Unit[5]; Arrays.setAll(children, (i) -> mock(Unit.class)); final U unit = this.factory.apply(children); final UnitVisitor visitor = mock(UnitVisitor.class); unit.accept(visitor); verifyVisit(unit, visitor); for (final Unit child : children) { verify(child).accept(eq(visitor)); } verifyNoMoreInteractions(children); verifyNoMoreInteractions(visitor); } /** * Verify if the correct visit method is called on the mock, depending on the tested instance * * @param unit The tested unit instance * @param mockedVisitor The mocked {@link UnitVisitor} who should have gotten a visit by the unit */ abstract void verifyVisit(final U unit, final UnitVisitor mockedVisitor); } java-design-patterns-1.18.0/visitor/src/test/java/com/iluwatar/visitor/VisitorTest.java000066400000000000000000000106161322244523500312720ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.visitor; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.AppenderBase; import java.util.LinkedList; import java.util.List; import java.util.Optional; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.slf4j.LoggerFactory; import static org.junit.jupiter.api.Assertions.assertEquals; /** * Date: 12/30/15 - 18:59 PM * Test case for Visitor Pattern * @param Type of UnitVisitor * @author Jeroen Meulemeester */ public abstract class VisitorTest { private InMemoryAppender appender; @BeforeEach public void setUp() { appender = new InMemoryAppender(); } @AfterEach public void tearDown() { appender.stop(); } /** * The tested visitor instance */ private final V visitor; /** * The optional expected response when being visited by a commander */ private final Optional commanderResponse; /** * The optional expected response when being visited by a sergeant */ private final Optional sergeantResponse; /** * The optional expected response when being visited by a soldier */ private final Optional soldierResponse; /** * Create a new test instance for the given visitor * * @param commanderResponse The optional expected response when being visited by a commander * @param sergeantResponse The optional expected response when being visited by a sergeant * @param soldierResponse The optional expected response when being visited by a soldier */ public VisitorTest(final V visitor, final Optional commanderResponse, final Optional sergeantResponse, final Optional soldierResponse) { this.visitor = visitor; this.commanderResponse = commanderResponse; this.sergeantResponse = sergeantResponse; this.soldierResponse = soldierResponse; } @Test public void testVisitCommander() { this.visitor.visitCommander(new Commander()); if (this.commanderResponse.isPresent()) { assertEquals(this.commanderResponse.get(), appender.getLastMessage()); assertEquals(1, appender.getLogSize()); } } @Test public void testVisitSergeant() { this.visitor.visitSergeant(new Sergeant()); if (this.sergeantResponse.isPresent()) { assertEquals(this.sergeantResponse.get(), appender.getLastMessage()); assertEquals(1, appender.getLogSize()); } } @Test public void testVisitSoldier() { this.visitor.visitSoldier(new Soldier()); if (this.soldierResponse.isPresent()) { assertEquals(this.soldierResponse.get(), appender.getLastMessage()); assertEquals(1, appender.getLogSize()); } } private class InMemoryAppender extends AppenderBase { private List log = new LinkedList<>(); public InMemoryAppender() { ((Logger) LoggerFactory.getLogger("root")).addAppender(this); start(); } @Override protected void append(ILoggingEvent eventObject) { log.add(eventObject); } public int getLogSize() { return log.size(); } public String getLastMessage() { return log.get(log.size() - 1).getFormattedMessage(); } } }

    * In this example we organize the request handlers ({@link RequestHandler}) into a chain where each * handler has a chance to act on the request on its turn. Here the king ({@link OrcKing}) makes * requests and the military orcs ({@link OrcCommander}, {@link OrcOfficer}, {@link OrcSoldier}) * form the handler chain. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { OrcKing king = new OrcKing(); king.makeRequest(new Request(RequestType.DEFEND_CASTLE, "defend castle")); king.makeRequest(new Request(RequestType.TORTURE_PRISONER, "torture prisoner")); king.makeRequest(new Request(RequestType.COLLECT_TAX, "collect tax")); } } java-design-patterns-1.18.0/chain/src/main/java/com/iluwatar/chain/OrcCommander.java000066400000000000000000000031411322244523500302520ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.chain; /** * * OrcCommander * */ public class OrcCommander extends RequestHandler { public OrcCommander(RequestHandler handler) { super(handler); } @Override public void handleRequest(Request req) { if (req.getRequestType().equals(RequestType.DEFEND_CASTLE)) { printHandling(req); req.markHandled(); } else { super.handleRequest(req); } } @Override public String toString() { return "Orc commander"; } } java-design-patterns-1.18.0/chain/src/main/java/com/iluwatar/chain/OrcKing.java000066400000000000000000000027611322244523500272440ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.chain; /** * * OrcKing makes requests that are handled by the chain. * */ public class OrcKing { RequestHandler chain; public OrcKing() { buildChain(); } private void buildChain() { chain = new OrcCommander(new OrcOfficer(new OrcSoldier(null))); } public void makeRequest(Request req) { chain.handleRequest(req); } } java-design-patterns-1.18.0/chain/src/main/java/com/iluwatar/chain/OrcOfficer.java000066400000000000000000000031351322244523500277250ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.chain; /** * * OrcOfficer * */ public class OrcOfficer extends RequestHandler { public OrcOfficer(RequestHandler handler) { super(handler); } @Override public void handleRequest(Request req) { if (req.getRequestType().equals(RequestType.TORTURE_PRISONER)) { printHandling(req); req.markHandled(); } else { super.handleRequest(req); } } @Override public String toString() { return "Orc officer"; } } java-design-patterns-1.18.0/chain/src/main/java/com/iluwatar/chain/OrcSoldier.java000066400000000000000000000031271322244523500277520ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.chain; /** * * OrcSoldier * */ public class OrcSoldier extends RequestHandler { public OrcSoldier(RequestHandler handler) { super(handler); } @Override public void handleRequest(Request req) { if (req.getRequestType().equals(RequestType.COLLECT_TAX)) { printHandling(req); req.markHandled(); } else { super.handleRequest(req); } } @Override public String toString() { return "Orc soldier"; } } java-design-patterns-1.18.0/chain/src/main/java/com/iluwatar/chain/Request.java000066400000000000000000000056401322244523500273370ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.chain; import java.util.Objects; /** * Request */ public class Request { /** * The type of this request, used by each item in the chain to see if they should or can handle * this particular request */ private final RequestType requestType; /** * A description of the request */ private final String requestDescription; /** * Indicates if the request is handled or not. A request can only switch state from unhandled to * handled, there's no way to 'unhandle' a request */ private boolean handled; /** * Create a new request of the given type and accompanied description. * * @param requestType The type of request * @param requestDescription The description of the request */ public Request(final RequestType requestType, final String requestDescription) { this.requestType = Objects.requireNonNull(requestType); this.requestDescription = Objects.requireNonNull(requestDescription); } /** * Get a description of the request * * @return A human readable description of the request */ public String getRequestDescription() { return requestDescription; } /** * Get the type of this request, used by each person in the chain of command to see if they should * or can handle this particular request * * @return The request type */ public RequestType getRequestType() { return requestType; } /** * Mark the request as handled */ public void markHandled() { this.handled = true; } /** * Indicates if this request is handled or not * * @return true when the request is handled, false if not */ public boolean isHandled() { return this.handled; } @Override public String toString() { return getRequestDescription(); } } java-design-patterns-1.18.0/chain/src/main/java/com/iluwatar/chain/RequestHandler.java000066400000000000000000000034101322244523500306260ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.chain; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * RequestHandler * */ public abstract class RequestHandler { private static final Logger LOGGER = LoggerFactory.getLogger(RequestHandler.class); private RequestHandler next; public RequestHandler(RequestHandler next) { this.next = next; } /** * Request handler */ public void handleRequest(Request req) { if (next != null) { next.handleRequest(req); } } protected void printHandling(Request req) { LOGGER.info("{} handling request \"{}\"", this, req); } @Override public abstract String toString(); } java-design-patterns-1.18.0/chain/src/main/java/com/iluwatar/chain/RequestType.java000066400000000000000000000024151322244523500301760ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.chain; /** * * RequestType enumeration * */ public enum RequestType { DEFEND_CASTLE, TORTURE_PRISONER, COLLECT_TAX } java-design-patterns-1.18.0/chain/src/test/000077500000000000000000000000001322244523500204615ustar00rootroot00000000000000java-design-patterns-1.18.0/chain/src/test/java/000077500000000000000000000000001322244523500214025ustar00rootroot00000000000000java-design-patterns-1.18.0/chain/src/test/java/com/000077500000000000000000000000001322244523500221605ustar00rootroot00000000000000java-design-patterns-1.18.0/chain/src/test/java/com/iluwatar/000077500000000000000000000000001322244523500240105ustar00rootroot00000000000000java-design-patterns-1.18.0/chain/src/test/java/com/iluwatar/chain/000077500000000000000000000000001322244523500250725ustar00rootroot00000000000000java-design-patterns-1.18.0/chain/src/test/java/com/iluwatar/chain/AppTest.java000066400000000000000000000025061322244523500273200ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.chain; import org.junit.jupiter.api.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.18.0/chain/src/test/java/com/iluwatar/chain/OrcKingTest.java000066400000000000000000000040411322244523500301300ustar00rootroot00000000000000/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.chain; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertTrue; /** * Date: 12/6/15 - 9:29 PM * * @author Jeroen Meulemeester */ public class OrcKingTest { /** * All possible requests */ private static final Request[] REQUESTS = new Request[]{ new Request(RequestType.DEFEND_CASTLE, "Don't let the barbarians enter my castle!!"), new Request(RequestType.TORTURE_PRISONER, "Don't just stand there, tickle him!"), new Request(RequestType.COLLECT_TAX, "Don't steal, the King hates competition ..."), }; @Test public void testMakeRequest() throws Exception { final OrcKing king = new OrcKing(); for (final Request request : REQUESTS) { king.makeRequest(request); assertTrue( request.isHandled(), "Expected all requests from King to be handled, but [" + request + "] was not!" ); } } }java-design-patterns-1.18.0/checkstyle-suppressions.xml000066400000000000000000000032301322244523500232620ustar00rootroot00000000000000 java-design-patterns-1.18.0/checkstyle.xml000066400000000000000000000217101322244523500205120ustar00rootroot00000000000000 java-design-patterns-1.18.0/command/000077500000000000000000000000001322244523500172475ustar00rootroot00000000000000java-design-patterns-1.18.0/command/README.md000066400000000000000000000054471322244523500205400ustar00rootroot00000000000000--- layout: pattern title: Command folder: command permalink: /patterns/command/ categories: Behavioral tags: - Java - Gang Of Four - Difficulty-Intermediate - Functional --- ## Also known as Action, Transaction ## Intent Encapsulate a request as an object, thereby letting you parameterize clients with different requests, queue or log requests, and support undoable operations. ![alt text](./etc/command.png "Command") ## Applicability Use the Command pattern when you want to * parameterize objects by an action to perform. You can express such parameterization in a procedural language with a callback function, that is, a function that's registered somewhere to be called at a later point. Commands are an object-oriented replacement for callbacks. * specify, queue, and execute requests at different times. A Command object can have a lifetime independent of the original request. If the receiver of a request can be represented in an address space-independent way, then you can transfer a command object for the request to a different process and fulfill the request there * support undo. The Command's execute operation can store state for reversing its effects in the command itself. The Command interface must have an added Unexecute operation that reverses the effects of a previous call to execute. Executed commands are stored in a history list. Unlimited-level undo and redo is achieved by traversing this list backwards and forwards calling unexecute and execute, respectively * support logging changes so that they can be reapplied in case of a system crash. By augmenting the Command interface with load and store operations, you can keep a persistent log of changes. Recovering from a crash involves reloading logged commands from disk and re-executing them with the execute operation * structure a system around high-level operations build on primitive operations. Such a structure is common in information systems that support transactions. A transaction encapsulates a set of changes to data. The Command pattern offers a way to model transactions. Commands have a common interface, letting you invoke all transactions the same way. The pattern also makes it easy to extend the system with new transactions ## Typical Use Case * to keep a history of requests * implement callback functionality * implement the undo functionality ## Presentations * [Command Pattern](etc/presentation.html) ## Real world examples * [java.lang.Runnable](http://docs.oracle.com/javase/8/docs/api/java/lang/Runnable.html) * [Netflix Hystrix](https://github.com/Netflix/Hystrix/wiki) * [javax.swing.Action](http://docs.oracle.com/javase/8/docs/api/javax/swing/Action.html) ## Credits * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.18.0/command/etc/000077500000000000000000000000001322244523500200225ustar00rootroot00000000000000java-design-patterns-1.18.0/command/etc/command.png000066400000000000000000000657351322244523500221660ustar00rootroot00000000000000PNG  IHDRH3kIDATxo]$ DU :XTQLTR7PZqzNjuܜ&!1j$NGjEl!OLx7gΟ9ggvv[Wٳ;;;ٙ%A ylJP{w (Xk/΀Ͳx:Á3p+~V `í`[16LfцhW{AOVώ%ۯ:ayümw7p 6ݗwۯ: AΒrYe+4%+wvޑPH$hk;2-_uX蒨os:3gzgC}ykjӶ#mar!`U65tk Qy> guN`SBnW{|-f.#nͱ)No$i\(~; u&۽ey/Wry21xQ"X.Qe .=v|L; vn{x߬C+3 h<`<{U]ߒi+ +:莃]窷Y~i8 *PiF{œ6c5+ bWnۯ6܊_llp+~V ?`_~G_>-i=U5}Cg>|v\X-RR ^xՕIGjn<l،_{}{W;3|vN0MҞ 2`U`6?{ЅﾨK=m&F#3G8;^u&Ƀ''x_|_]xk_gu oCU\FG̖0 479>TnKc4!,sWvL{}wn{ꕿe?ij2}N~UvSό.0gGG1]MR$V\XQ_%6kiof5w޼|C3p{䶝yj&欢.% `F:{jߛ`qxvդWBD~Wuj?>%3΄X["-=Ӫ~9£2 $'`O6wף{0X6 ?`Q`[1+ bWnۯ6܊_llp+~V *)W67r٭o+J`UR`slL4qJ, xócz-2Y|bj-I<'D6[2\ FGB1YjbL[2\Ib~N$O+R'g" Ul!+%oo7 W h@NLho6693b(ϑr;2زg4y֛Ber>pSzk%4ŗQg2՜g ^(b`Mkr:p[z '{1u&}=^򺺨mwF6~\+ԥ5vLc.^tQup—K 5nW&p-Tל7]:" tY  r0_?Bu͢Z72J[Z! `2+E.[b! +{2hP9!Wm-9R%["T_h!lEd)ۉhtPnCDPZjjBL-TBXj vv3 Y&p(S*" Rf+3P3iC*GtPQl8\^DeP!8`e<͒~?YEq P߸yJϚ0^7 V(s9N+nTHI"( I* 7xC5 m*b&~Q!U{V0)xE`{3Ԙo jcR9W&"ԷxӚDy+E%<%40~ϵ+PY!tskYqu9&@W0^v` l*D,qA&Qv>۩Ql ;`[tZ< I2$sl~e) YQ_d:ʽ{\H`Yƞ; 5ѝ^LFB`ؑ)r#hXRW GU[h^ 0ܔyƞo h7;nYDP!T(eŚ M޳5 okR\F{@^e ~\S;I<#wMkWpF`8T<3iY缹6j& `U`L9^Y| y0h_WKx3Ph_ul8Alp+~V `í`[16>Smxʱ,⍤gW<*Kx#`l?T *Kx#`*"3*x#` l*F#g5*.x#` l*F"EST⍤gW&]"XB:5 8nq+gӸ8;{/?ɐcXu8iXSIp:ؑM{|␊l[~*!.J1m#9ui|C-f|e:<>Ih?AW|)뫉~tŕtmk3 (\!Oθp7ρM:: r+WMCI˄LV6X\~V|NOθiI;8 q+Z Gʷ-D]Y[& &tp(.ip#2dg``B`%q^Ǐ`e /ݾfW^?CЎ=,MVo۶Wl-J}]xq׮]9b{޽O^xbFu($CЖm(V9ب#x]AcOĒv6`G|Z#xFu+츔3/5;X0Q]J;.zu׮]{O|^JWի_OO5U lT׽V}PbnrG]Uv!wTN`ۅQ;amrGU`o +YjqG BJ ʠ,5 gm#{v.õM;;{#{DƒrYe+4%+N^ˎԅB"ɅES_ۑi9/䎪.5.#\g,TlY}m6m;!.z >Q ئnm^ js#Qه,`SBl/BƖ{ TVu?Qvio`&_ƎBU-cey/Wry21xQ"X.QA\{QFx߬C+U p:ggB[r#"|r!zţrGU;ϱfsxC.@:T qo.䎪v4 `w.* l;v' B؝0 *8ӟ^%st.*`_~G_>sg`+v!wTyӇ<}5*mݬ;|ͨ߿~ܷ7y?>sɩliw싨 hW/!wT56kg]ʾvxn5> t5F` `ۅQ8y=|_ɷc^S7rIGV1m3;{}wn{ꕿe\}sqO?~R-'[ ]MPƢ)6W&u_ݕj.W]U}۷~ ;o^}y=rcwܼA~Q9[FW=ﾦDp З[7d/mrGU`7qQ_>zΣ{|+?{:|vr;]~|V [5 t&>[_S]+ b²qdބQ8졝εco/<;{'i]ϤEna+ҍS'/rRrGU`_~|w&^뽧o:|}PVt ޯOFuM9_5J!䎪f^Ɖܽ^}OƑG^xe?|j{HeTgH[kJ9*G̳BvMsw}e]3[R]QsN<#I.wMLɕHW W;;<=z]}ߗ>>XWOW.%R2U7֟OЋ!lB6ܠ]Uv!wTN`ۅQ;amrG]Uv!wTN`ۅQ;amrGU7]67$٭oӛ v;f; ` c$‹Әv+Hω$BV_:gP WFCev#ptz#y,{1!wTQ`^.3 ,\:="d 7Woإ͒[jjW0GۗdOmrG6_RKmVqU:Pv^eeqzbTiZ/C\.);hI(7 vQʳB ]aFm1&ńQQڐEoSW6b6|]M ,{Egw<&ɌmUBmzkrGղ."Nh] u&EǛ-]u7q\W4[z$}/.*p\v!wTN`ۅQ;amrG]Uv!wTN`ۅQeu(zvIZ[5v<@mrG]Uv!wTN`ۅQγNgvlU]5UUv!wTN`ۅQ5ӛ kkeWv!wTwH3CeWv!wT { Bjl!8~{06Ka؊XyrGղMq)2I?.`WA-~c3 gΟ7Ô<Fd)`"`ۅQe}mϯ}WN_w%UMt1g97N+\/ʪfA?Uӳꚣ*%"Rrv!wTy]9U /[(fʼ?k?VWPm9soȂm12 <<<#a`Ѽ+nKϵ+(<)mZ]U&>=ϰ_PrlY-M-_vB2#>cZ?/\e մ3S-uΙ^c4Qe<'o{N||}`T%~2yB!{X;쏻>]q5b_lYoنPS*Lo2\Bx2B.W*j¾_5$ ;Ɠ*!ytBb+Nyq]m_nfdcv!wTvǢΊxlaUe qS꽮y|bٴI)!`*¦h;lg!wTv.YJ$sM̷Lo_%{ j_If=XKkӫ{rGJC`sy!ݳ%X{]UGKRYx%y"6߬r_[w`ۅQe)aOt+Kf,ߴ{$R,d4^ޗ\E:66%wD7d]U&.T6dOVM\M\3n5^1V!)kϙvVuk8 nwkWekǐھ\UyQe{AjVpz5B<^HmJ`(klW2Zf|4} Į~mSJ7awK` vG`)}!nmrGU`/ E"Zv:]Uim!V#pnv!wT%vv!wTN`ۅQ5'ؘݎ]U*`ۅQ5؈Җ]Um]߫á Q]U`7A6pB<9T B-JMyH%`ۅQe) P&N#"HBDnmrG l*di$W.A!J"7 SC1T-HW DIv!wTvBs} BlX3 `w.*DP]U l;Av!wTS!wT)ۋ;FPAEUDP3+&\+N^Q|@LxU=`BZ> viYg"p "䎪#08 Bj, Sv!wT-A6 lBZ&:ރ);;݅)6l;Slv!wT6X BllmrG]U l;Av!wT!J' BjQ >PDiOJ +䎪#NT 8^%LnV}P)ءQtxC &c9D_ ^UEPo43)Z8mb$F޲,Nɴc<{أJ nCU&#DLddߊX67.y-fbVkD_ ݊;L`;FPfnP"q0ABy/NW`#*nTO3ѷ,Cņt~>h ՠ(|.w} )Sn1Jd)(JΛK0)yVAE$"x_ U"U|#JP*i} )A+LtMU]Wo'J}WWB`#**Y+Fl;+VQ-;[iHLWL)mc`.* l;v' BڲijD-ݦ^wT4~v*z-ݚջvؤ__bvBKU'S /xii^x[ol%݂r\rm۶Ŏn2dv+ءũf/]t 7敃>J~oIէ~: ['i?6I~@[I/d!DR=SVۻLTO $'O8p@_ `i`[Z"`;G٩fbB&)Ο??M߂Ŋ/CRddv|G[o۶xX* -V'o߾]_ήqփe  `{+Gݺuwk_ZA oeA `ӎ;~gfVY+v-۲eKŋ{eHfv@bXfmoVQ35[jt0={-riW8l?~ˊ8dZ#h0ْR/b5kʰX& n`Yv*!v54Y]h ȓw1m"m'$qlb嘵NE\•._:kB `H:6lBII0ԫ/. 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IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.command; /** * * The Command pattern is a behavioral design pattern in which an object is used to encapsulate all * information needed to perform an action or trigger an event at a later time. This information * includes the method name, the object that owns the method and values for the method parameters. *