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Merge pull request #10 from seeker89/jvm
Chapter 8: JVM
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‎Makefile

+4-1
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all: killer-whiles who-you-gonna-call
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all: killer-whiles who-you-gonna-call jvm
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killer-whiles:
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(cd examples/killer-whiles && make)
@@ -7,6 +7,9 @@ who-you-gonna-call:
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(cd examples/who-you-gonna-call && make)
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(cd examples/who-you-gonna-call/src && make gen && make)
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jvm:
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(cd examples/jvm && make)
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clean:
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rm -rf vm/vm.zip vm/parts.sha256 vm/chaos-engineering-VM*
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‎examples/jvm/Makefile

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CFLAGS=-O0
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all: FizzBuzzEnterpriseEdition/bin/FizzBuzzEnterpriseEdition byteman-download-4.0.11 byte-monkey.jar
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src:
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git clone https://github.com/EnterpriseQualityCoding/FizzBuzzEnterpriseEdition.git src
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byteman-download-4.0.11:
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wget https://downloads.jboss.org/byteman/4.0.11/byteman-download-4.0.11-bin.zip
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unzip byteman-download-4.0.11-bin.zip
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rm byteman-download-4.0.11-bin.zip
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byte-monkey.jar:
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wget https://github.com/mrwilson/byte-monkey/releases/download/1.0.0/byte-monkey.jar
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FizzBuzzEnterpriseEdition/bin/FizzBuzzEnterpriseEdition: src
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(cd src && ./gradlew assemble && ./gradlew build)
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unzip src/build/distributions/FizzBuzzEnterpriseEdition.zip
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run:
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./FizzBuzzEnterpriseEdition/bin/FizzBuzzEnterpriseEdition
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run2:
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java -classpath "./FizzBuzzEnterpriseEdition/lib/*" com.seriouscompany.business.java.fizzbuzz.packagenamingpackage.impl.Main
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run3:
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javap -classpath "./FizzBuzzEnterpriseEdition/lib/*" -c com.seriouscompany.business.java.fizzbuzz.packagenamingpackage.impl.Main
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run4:
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java -javaagent:./agent1.jar -classpath "./FizzBuzzEnterpriseEdition/lib/*" com.seriouscompany.business.java.fizzbuzz.packagenamingpackage.impl.Main
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run5:
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java -javaagent:./agent2.jar -classpath "./FizzBuzzEnterpriseEdition/lib/*" com.seriouscompany.business.java.fizzbuzz.packagenamingpackage.impl.Main
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run6:
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java \
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-javaagent:./byteman-download-4.0.11/lib/byteman.jar=script:throw.btm \
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-classpath "./FizzBuzzEnterpriseEdition/lib/*" \
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com.seriouscompany.business.java.fizzbuzz.packagenamingpackage.impl.Main
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run7:
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java \
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-javaagent:byte-monkey.jar=mode:fault,rate:0.5,filter:com/seriouscompany/business/java/fizzbuzz/packagenamingpackage/impl/strategies/SystemOutFizzBuzzOutputStrategy/output \
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-classpath "./FizzBuzzEnterpriseEdition/lib/*" \
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com.seriouscompany.business.java.fizzbuzz.packagenamingpackage.impl.Main
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example1-compile:
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javac ./org/my/example1.java
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example1-run:
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java org.my.Example1
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example1-bytecode:
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javap -c org.my.Example1
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example1-agent:
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java -javaagent:./agent1.jar org.my.Example1
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example2-compile:
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javac ./org/my/example2.java
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example2-run:
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java org.my.Example2
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example2-bytecode:
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javap -c org.my.Example2
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.PHONY: run run2 run3 example1-compile example1-run example1-bytecode example2-compile example2-run example2-bytecode
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agent1.jar: org/agent/Agent.java org/agent/ClassPrinter.java org/agent/manifest.mf
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javac org/agent/Agent.java
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javac org/agent/ClassPrinter.java
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jar vcmf org/agent/manifest.mf agent1.jar org/agent
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agent2.jar: org/agent2/Agent.java org/agent2/ClassInjector.java org/agent2/manifest.mf
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javac -XDignore.symbol.file org/agent2/Agent.java
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javac -XDignore.symbol.file org/agent2/ClassInjector.java
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jar vcmf org/agent2/manifest.mf agent2.jar org/agent2

‎examples/jvm/org/agent/Agent.java

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package org.agent;
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import java.lang.instrument.Instrumentation;
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class Agent {
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public static void premain(String args, Instrumentation instrumentation){
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ClassPrinter transformer = new ClassPrinter();
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instrumentation.addTransformer(transformer);
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}
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}

‎examples/jvm/org/agent/ClassPrinter.java

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package org.agent;
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import java.lang.instrument.ClassFileTransformer;
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import java.lang.instrument.IllegalClassFormatException;
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import java.security.ProtectionDomain;
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class ClassPrinter implements ClassFileTransformer {
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public byte[] transform(ClassLoader loader,
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String className,
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Class<?> classBeingRedefined,
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ProtectionDomain protectionDomain,
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byte[] classfileBuffer) throws IllegalClassFormatException {
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System.out.println("Found class: " + className + " (" + classfileBuffer.length + " bytes)");
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return classfileBuffer;
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}
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}

‎examples/jvm/org/agent/manifest.mf

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Manifest-Version: 1.0
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Premain-Class: org.agent.Agent

‎examples/jvm/org/agent2/Agent.java

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package org.agent2;
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import java.lang.instrument.Instrumentation;
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class Agent {
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public static void premain(String args, Instrumentation instrumentation){
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ClassInjector transformer = new ClassInjector();
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instrumentation.addTransformer(transformer);
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}
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}

‎examples/jvm/org/agent2/ClassInjector.java

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package org.agent2;
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import java.io.IOException;
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import java.util.List;
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import java.lang.instrument.ClassFileTransformer;
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import java.lang.instrument.IllegalClassFormatException;
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import java.security.ProtectionDomain;
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import jdk.internal.org.objectweb.asm.ClassReader;
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import jdk.internal.org.objectweb.asm.ClassWriter;
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import jdk.internal.org.objectweb.asm.tree.*;
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import jdk.internal.org.objectweb.asm.Opcodes;
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public class ClassInjector implements ClassFileTransformer {
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public String targetClassName = "com/seriouscompany/business/java/fizzbuzz/packagenamingpackage/impl/strategies/SystemOutFizzBuzzOutputStrategy";
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public byte[] transform(ClassLoader loader,
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String className,
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Class<?> classBeingRedefined,
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ProtectionDomain protectionDomain,
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byte[] classfileBuffer) throws IllegalClassFormatException {
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if (className.equals(this.targetClassName)){
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System.err.println("[CHAOS] TARGET ACQUIRED: " + className + " (" + classfileBuffer.length + " bytes)");
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ClassNode classNode = new ClassNode();
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new ClassReader(classfileBuffer).accept(classNode, 0);
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classNode.methods.stream()
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.filter(method -> method.name.equals("output"))
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.forEach(method -> {
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InsnList instructions = new InsnList();
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instructions.add(new MethodInsnNode(
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Opcodes.INVOKESTATIC,
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"org/agent2/ClassInjector",
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"throwIOException",
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"()V",
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false // not a method
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));
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method.maxStack += 1;
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method.instructions.insertBefore(method.instructions.getFirst(), instructions);
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System.err.println("[CHAOS] Method " + method.name + " modified");
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});
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final ClassWriter classWriter = new ClassWriter(0);
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classNode.accept(classWriter);
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byte[] bytes = classWriter.toByteArray();
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System.err.println("[CHAOS] Rewrote: " + className + " (" + bytes.length + " bytes)");
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return bytes;
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}
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return classfileBuffer;
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}
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public static void throwIOException() throws IOException
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{
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System.err.println("[CHAOS] BOOM! Throwing");
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throw new IOException("CHAOS");
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}
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}

‎examples/jvm/org/agent2/manifest.mf

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Manifest-Version: 1.0
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Premain-Class: org.agent2.Agent
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Can-Redefine-Classes: true
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Can-Retransform-Classes: true

‎examples/jvm/org/my/example1.java

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package org.my;
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class Example1
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{
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public static void main(String[] args)
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{
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System.out.println("Hello chaos!");
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}
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}

‎examples/jvm/org/my/example2.java

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package org.my;
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import java.io.IOException;
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class Example2
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{
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public static void main(String[] args) throws IOException
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{
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Example2.throwIOException();
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}
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public static void throwIOException() throws IOException
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{
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throw new IOException("Oops");
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}
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}

‎examples/jvm/throw.btm

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RULE throw an exception at output
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CLASS SystemOutFizzBuzzOutputStrategy
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METHOD output
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AT ENTRY
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IF true
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DO
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traceln("entering the method output");
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throw new java.io.IOException("BOOM");
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ENDRULE

‎vm/ansible/prerequisites/defaults/main.yml

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@@ -42,6 +42,8 @@ packages_to_install:
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- manpages-posix-dev
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# seccomp
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- libseccomp-dev
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# java
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- openjdk-8-jdk
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packages_to_remove:
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- libreoffice-core

‎vm/ansible/prerequisites/tasks/main.yml

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become: false
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shell: |
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gsettings set org.gnome.desktop.session idle-delay 0
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- name: Add auto-login
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become: true
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lineinfile:
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path: /etc/gdm3/custom.conf
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line: "{{ item }}"
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loop:
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- "AutomaticLoginEnable = true"
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- "AutomaticLogin = chaos"

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