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Dockerfile

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FROM maven:amazoncorretto as build
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WORKDIR /javaapp
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COPY . .
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RUN mvn clean install
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FROM adhig93/tomcat-conf
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COPY --from=build /javaapp/target/*.war /usr/local/tomcat/webapps/

Procfile

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web: java $JAVA_OPTS -jar target/dependency/jetty-runner.jar --port $PORT target/*.war

README.md

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# Simple Java Project
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This is a demo project that you can use with [Buddy Continuous Deployment](https://buddy.works).

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" 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/maven-v4_0_0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>works.buddy.samples</groupId>
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<artifactId>works-with-heroku</artifactId>
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<version>1.0</version>
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<packaging>war</packaging>
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<properties>
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<maven.compiler.source>1.6</maven.compiler.source>
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<maven.compiler.target>1.6</maven.compiler.target>
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</properties>
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<dependencies>
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<dependency>
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<groupId>javax.servlet</groupId>
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<artifactId>servlet-api</artifactId>
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<version>2.5</version>
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<scope>provided</scope>
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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>4.12</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.mockito</groupId>
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<artifactId>mockito-all</artifactId>
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<version>1.10.19</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-dependency-plugin</artifactId>
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<version>2.3</version>
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<executions>
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<execution>
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<phase>package</phase>
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<goals><goal>copy</goal></goals>
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<configuration>
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<artifactItems>
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<artifactItem>
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<groupId>org.eclipse.jetty</groupId>
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<artifactId>jetty-runner</artifactId>
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<version>9.3.3.v20150827</version>
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<destFileName>jetty-runner.jar</destFileName>
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</artifactItem>
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</artifactItems>
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</configuration>
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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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</project>
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package works.buddy.samples;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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import java.io.PrintWriter;
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public class WorksWithHerokuServlet extends HttpServlet {
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protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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response.setContentType("text/plain");
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response.setStatus(404);
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PrintWriter writer = response.getWriter();
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writer.print("WEB APP WORKING");
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writer.close();
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}
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}

src/main/webapp/WEB-INF/web.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
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<display-name>Works with Heroku</display-name>
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<servlet>
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<servlet-name>WorksWithHerokuServlet</servlet-name>
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<servlet-class>works.buddy.samples.WorksWithHerokuServlet</servlet-class>
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</servlet>
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<servlet-mapping>
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<servlet-name>WorksWithHerokuServlet</servlet-name>
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<url-pattern>/</url-pattern>
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</servlet-mapping>
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</web-app>
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package works.buddy.samples;
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import org.junit.Before;
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import org.junit.Test;
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import org.mockito.Mock;
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import org.mockito.MockitoAnnotations;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.ByteArrayOutputStream;
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import java.io.PrintWriter;
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import static org.junit.Assert.assertEquals;
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import static org.mockito.Mockito.when;
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public class WorksWithHerokuServletTest {
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private WorksWithHerokuServlet servlet;
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@Mock
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private HttpServletRequest request;
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@Mock
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private HttpServletResponse response;
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@Before
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public void setUp() throws Exception {
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MockitoAnnotations.initMocks(this);
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servlet = new WorksWithHerokuServlet();
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}
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@Test
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public void testDoGet() throws Exception {
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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PrintWriter writer = new PrintWriter(out);
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when(response.getWriter()).thenReturn(writer);
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servlet.doGet(request, response);
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assertEquals("WEB APP WORKING", new String( out.toByteArray(), "UTF-8"));
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}
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}

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