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BAEL-1277: RESTFul CRUD application with JavaLite (eugenp#3359)
* BAEL-1277: RESTFul CRUD application with JavaLite. * BAEL-1277: RESTFul CRUD application with JavaLite. Adding exception handling.
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‎java-lite/README.md‎

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### Relevant Articles:
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- [RESTFul CRUD application with JavaLite] ()

‎java-lite/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>org.baeldung</groupId>
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<artifactId>java-lite</artifactId>
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<version>1.0-SNAPSHOT</version>
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<parent>
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<groupId>com.baeldung</groupId>
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<artifactId>parent-modules</artifactId>
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<version>1.0.0-SNAPSHOT</version>
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</parent>
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<properties>
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<jetty.maven.plugin.version>9.3.4.RC1</jetty.maven.plugin.version>
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<activejdbc.version>1.4.13</activejdbc.version>
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<activeweb.version>1.15</activeweb.version>
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<mysql.connector.java.version>5.1.45</mysql.connector.java.version>
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<sun.tools.version>1.7.0</sun.tools.version>
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<jackson.version>1.8.2</jackson.version>
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<junit.version>4.11</junit.version>
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</properties>
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<build>
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<plugins>
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<plugin>
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<groupId>org.eclipse.jetty</groupId>
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<artifactId>jetty-maven-plugin</artifactId>
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<version>${jetty.maven.plugin.version}</version>
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<configuration>
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<systemProperties>
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<systemProperty>
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<name>activejdbc.log</name>
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<value></value>
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</systemProperty>
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<systemProperty>
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<name>active_reload</name>
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<value>true</value>
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</systemProperty>
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<systemProperty>
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<name>activeweb.log.request</name>
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<value>true</value>
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</systemProperty>
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</systemProperties>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.javalite</groupId>
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<artifactId>activejdbc-instrumentation</artifactId>
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<version>${activejdbc.version}</version>
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<executions>
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<execution>
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<phase>process-classes</phase>
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<goals>
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<goal>instrument</goal>
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</goals>
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</execution>
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</executions>
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</plugin>
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</plugins>
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</build>
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<dependencies>
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<dependency>
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<groupId>org.javalite</groupId>
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<artifactId>activeweb</artifactId>
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<version>${activeweb.version}</version>
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</dependency>
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<dependency>
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<groupId>mysql</groupId>
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<artifactId>mysql-connector-java</artifactId>
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<version>${mysql.connector.java.version}</version>
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</dependency>
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<dependency>
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<groupId>com.sun</groupId>
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<artifactId>tools</artifactId>
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<version>${sun.tools.version}</version>
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<scope>system</scope>
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<systemPath>${java.home}/../lib/tools.jar</systemPath>
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</dependency>
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<dependency>
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<groupId>org.codehaus.jackson</groupId>
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<artifactId>jackson-core-lgpl</artifactId>
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<version>${jackson.version}</version>
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</dependency>
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<dependency>
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<groupId>org.codehaus.jackson</groupId>
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<artifactId>jackson-mapper-lgpl</artifactId>
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<version>${jackson.version}</version>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>${junit.version}</version>
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</dependency>
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</dependencies>
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</project>

‎java-lite/src/main/java/app/config/AppBootstrap.java‎

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package app.config;
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import org.javalite.activeweb.AppContext;
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import org.javalite.activeweb.Bootstrap;
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public class AppBootstrap extends Bootstrap {
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public void init(AppContext context) {
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}
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}

‎java-lite/src/main/java/app/config/AppControllerConfig.java‎

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package app.config;
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import app.controllers.ProductsController;
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import org.javalite.activeweb.AbstractControllerConfig;
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import org.javalite.activeweb.AppContext;
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import org.javalite.activeweb.controller_filters.DBConnectionFilter;
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import org.javalite.activeweb.controller_filters.TimingFilter;
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public class AppControllerConfig extends AbstractControllerConfig {
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@Override
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public void init(AppContext appContext) {
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addGlobalFilters(new TimingFilter());
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add(new DBConnectionFilter()).to(ProductsController.class);
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}
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}

‎java-lite/src/main/java/app/config/DbConfig.java‎

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package app.config;
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import org.javalite.activeweb.AbstractDBConfig;
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import org.javalite.activeweb.AppContext;
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public class DbConfig extends AbstractDBConfig {
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@Override
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public void init(AppContext appContext) {
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this.configFile("/database.properties");
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}
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}

‎java-lite/src/main/java/app/controllers/ProductsController.java‎

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package app.controllers;
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import app.models.Product;
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import org.codehaus.jackson.map.ObjectMapper;
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import org.javalite.activeweb.AppController;
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import org.javalite.activeweb.annotations.RESTful;
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import java.util.Map;
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@RESTful
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public class ProductsController extends AppController {
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public void index() {
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try {
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view("products", Product.findAll());
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render().contentType("application/json");
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} catch (Exception e) {
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view("message", "There was an error.", "code", 200);
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render("message");
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}
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}
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public void create() {
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try {
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Map payload = new ObjectMapper().readValue(getRequestString(), Map.class);
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Product p = new Product();
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p.fromMap(payload);
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p.saveIt();
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view("message", "Successfully saved product id " + p.get("id"), "code", 200);
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render("message");
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} catch (Exception e) {
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view("message", "There was an error.", "code", 200);
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render("message");
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}
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}
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public void update() {
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try {
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Map payload = new ObjectMapper().readValue(getRequestString(), Map.class);
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String id = getId();
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Product p = Product.findById(id);
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if (p == null) {
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view("message", "Product id " + id + " not found.", "code", 200);
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render("message");
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return;
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}
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p.fromMap(payload);
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p.saveIt();
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view("message", "Successfully updated product id " + id, "code", 200);
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render("message");
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} catch (Exception e) {
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view("message", "There was an error.", "code", 200);
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render("message");
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}
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}
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public void show() {
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try {
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String id = getId();
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Product p = Product.findById(id);
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if (p == null) {
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view("message", "Product id " + id + " not found.", "code", 200);
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render("message");
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return;
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}
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view("product", p);
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render("_product");
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} catch (Exception e) {
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view("message", "There was an error.", "code", 200);
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render("message");
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}
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}
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public void destroy() {
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try {
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String id = getId();
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Product p = Product.findById(id);
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if (p == null) {
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view("message", "Product id " + id + " not found.", "code", 200);
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render("message");
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return;
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}
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p.delete();
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view("message", "Successfully deleted product id " + id, "code", 200);
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render("message");
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} catch (Exception e) {
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view("message", "There was an error.", "code", 200);
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render("message");
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}
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}
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@Override
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protected String getContentType() {
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return "application/json";
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}
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@Override
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protected String getLayout() {
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return null;
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}
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}

‎java-lite/src/main/java/app/models/Product.java‎

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package app.models;
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import org.javalite.activejdbc.Model;
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public class Product extends Model {
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}

‎java-lite/src/main/resources/database.properties‎

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development.driver=com.mysql.jdbc.Driver
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development.username=user
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development.password=password
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development.url=jdbc:mysql://localhost/dbname

‎java-lite/src/main/webapp/WEB-INF/views/products/_comma.ftl‎

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,

‎java-lite/src/main/webapp/WEB-INF/views/products/_product.ftl‎

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{
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"id" : ${product.id},
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"name" : "${product.name}"
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}

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