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‎.gitignore

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.DS_Store
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.gradle
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.idea
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.classpath
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.project
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.settings
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.yardoc
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.yardopts
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bin
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build
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target
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out
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*.iml
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*.ipr
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*.iws
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test-output
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Scratch.java
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ScratchTest.java
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test-results
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test-tmp
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*.class
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src/gen
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src/test/java/io/vertx/codegen/**
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src/test/java/com/acme/**
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src/test/scala/io/vertx/scala/codegen/**
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src/test/scala/com/acme/**
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src/test/asciidoc

‎LICENSE-2.0.txt

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Apache License
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Version 2.0, January 2004
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http://www.apache.org/licenses/
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‎README.md

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#Multi-Jvm
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This projects provides a few helper classes to allow easy creation and
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destruction of multiple JVMs from inside an integration test.
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The main inspiration came from working with the [sbt-multi-jvm-plugin](https://github.com/sbt/sbt-multi-jvm)
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This is a cleanroom implementaion that is NOT based on the code from sbt-multi-jvm.
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#Why?
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When working with distributed systems (Vert.x, Akka, Quasar, ...) it is
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useful to test certain behavior from the outside (serialization,
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leader election, memory usage, ...). Spawning a small cluster using the
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code included in this project is quite simple and should enable testing
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of complex interaction scenarios (well, at least that's what I hope ...)
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#Usage
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Check out and do ```mvn clean install```
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Add the dependency to your project:
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```xml
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<dependency>
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<groupId>de.codeptibull</groupId>
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<artifactId>multi-jvm-runner</artifactId>
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<version>1.0-SNAPSHOT</version>
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<scope>test</test>
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</dependency>
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```
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In your test spawn the process:
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```java
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import de.codeptibull.maven.multijvm.JvmProcess
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JvmProcess proc = JvmProcess.builder().addCurrentClasspath().mainClass(JvmTest.class.getName()).build();
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proc.waitFor();
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```
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#Demo
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Take a look into the test-sources in *src/test/java/de/codepitbull/multijvm/vertx* for a full example.
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#Why no Maven?
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I initially thought about writing a Maven plugin to use this. It didn't
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really make sense as Maven's phases are a lot more static than those of
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sbt. I might continue if someone comes up with a good case for such a
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plugin.

‎pom.xml

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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>de.codeptibull</groupId>
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<artifactId>multi-jvm-runner</artifactId>
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<packaging>jar</packaging>
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<version>1.0-SNAPSHOT</version>
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<name>multi-jvm Runner</name>
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<licenses>
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<license>
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<name>The Apache Software License, Version 2.0</name>
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<url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
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<distribution>repo</distribution>
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</license>
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</licenses>
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<properties>
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<maven.compiler.source>1.8</maven.compiler.source>
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<maven.compiler.target>1.8</maven.compiler.target>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
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<junit.version>4.12</junit.version>
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<vertx.version>3.3.0</vertx.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>${junit.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>io.vertx</groupId>
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<artifactId>vertx-core</artifactId>
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<version>${vertx.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>io.vertx</groupId>
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<artifactId>vertx-hazelcast</artifactId>
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<version>${vertx.version}</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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</project>

‎src/main/java/de/codeptibull/multijvm/InputStreamProcessor.java

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package de.codeptibull.multijvm;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.util.List;
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import java.util.concurrent.CopyOnWriteArrayList;
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import java.util.function.Consumer;
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public class InputStreamProcessor {
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private InputStream inputStream;
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private List<Consumer<String>> consumerList = new CopyOnWriteArrayList<>();
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private Thread thread;
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private volatile boolean stop = false;
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public InputStreamProcessor(InputStream inputStream) {
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this.inputStream = inputStream;
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thread = new Thread() {
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@Override
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public void run() {
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try {
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try (BufferedReader br = new BufferedReader(new InputStreamReader(inputStream))) {
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String line;
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while (((line = br.readLine()) != null) && !stop) {
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for (Consumer<String> c : consumerList) {
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c.accept(line);
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}
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}
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}
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} catch (IOException ioe) {
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throw new RuntimeException(ioe);
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}
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}
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};
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}
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public InputStreamProcessor addConsumer(Consumer<String> consumer) {
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consumerList.add(consumer);
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return this;
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}
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public InputStreamProcessor removeConsumer(Consumer<String> consumer) {
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consumerList.remove(consumer);
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return this;
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}
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public InputStreamProcessor start() {
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thread.start();
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return this;
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}
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public InputStreamProcessor stop() {
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stop = true;
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thread.interrupt();
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return this;
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}
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}

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