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package org.apache.maven.lifecycle.internal.builder.multithreaded;
/*
* 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.
*/
import junit.framework.TestCase;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.lifecycle.LifecycleNotFoundException;
import org.apache.maven.lifecycle.LifecyclePhaseNotFoundException;
import org.apache.maven.lifecycle.internal.ProjectBuildList;
import org.apache.maven.lifecycle.internal.ProjectSegment;
import org.apache.maven.lifecycle.internal.builder.multithreaded.ThreadOutputMuxer;
import org.apache.maven.lifecycle.internal.stub.ProjectDependencyGraphStub;
import org.apache.maven.plugin.InvalidPluginDescriptorException;
import org.apache.maven.plugin.MojoNotFoundException;
import org.apache.maven.plugin.PluginDescriptorParsingException;
import org.apache.maven.plugin.PluginNotFoundException;
import org.apache.maven.plugin.PluginResolutionException;
import org.apache.maven.plugin.prefix.NoPluginFoundForPrefixException;
import org.apache.maven.plugin.version.PluginVersionResolutionException;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.CompletionService;
import java.util.concurrent.ExecutorCompletionService;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
/**
* @author Kristian Rosenvold
*/
public class ThreadOutputMuxerTest
extends TestCase
{
final String paid = "Paid";
final String in = "In";
final String full = "Full";
public void testSingleThreaded()
throws Exception
{
ProjectBuildList src = getProjectBuildList();
ProjectBuildList projectBuildList =
new ProjectBuildList( Arrays.asList( src.get( 0 ), src.get( 1 ), src.get( 2 ) ) );
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
PrintStream systemOut = new PrintStream( byteArrayOutputStream );
ThreadOutputMuxer threadOutputMuxer = new ThreadOutputMuxer( projectBuildList, systemOut );
threadOutputMuxer.associateThreadWithProjectSegment( projectBuildList.get( 0 ) );
System.out.print( paid ); // No, this does not print to system.out. It's part of the test
assertEquals( paid.length(), byteArrayOutputStream.size() );
threadOutputMuxer.associateThreadWithProjectSegment( projectBuildList.get( 1 ) );
System.out.print( in ); // No, this does not print to system.out. It's part of the test
assertEquals( paid.length(), byteArrayOutputStream.size() );
threadOutputMuxer.associateThreadWithProjectSegment( projectBuildList.get( 2 ) );
System.out.print( full ); // No, this does not print to system.out. It's part of the test
assertEquals( paid.length(), byteArrayOutputStream.size() );
threadOutputMuxer.setThisModuleComplete( projectBuildList.get( 0 ) );
threadOutputMuxer.setThisModuleComplete( projectBuildList.get( 1 ) );
threadOutputMuxer.setThisModuleComplete( projectBuildList.get( 2 ) );
threadOutputMuxer.close();
assertEquals( ( paid + in + full ).length(), byteArrayOutputStream.size() );
}
public void testMultiThreaded()
throws Exception
{
ProjectBuildList projectBuildList = getProjectBuildList();
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
PrintStream systemOut = new PrintStream( byteArrayOutputStream );
final ThreadOutputMuxer threadOutputMuxer = new ThreadOutputMuxer( projectBuildList, systemOut );
final List<String> stringList =
Arrays.asList( "Thinkin", "of", "a", "master", "plan", "Cuz", "ain’t", "nuthin", "but", "sweat", "inside",
"my", "hand" );
Iterator<String> lyrics = stringList.iterator();
ExecutorService executor = Executors.newFixedThreadPool( 10 );
CompletionService<ProjectSegment> service = new ExecutorCompletionService<ProjectSegment>( executor );
List<Future<ProjectSegment>> futures = new ArrayList<Future<ProjectSegment>>();
for ( ProjectSegment projectBuild : projectBuildList )
{
final Future<ProjectSegment> buildFuture =
service.submit( new Outputter( threadOutputMuxer, projectBuild, lyrics.next() ) );
futures.add( buildFuture );
}
for ( Future<ProjectSegment> future : futures )
{
future.get();
}
int expectedLength = 0;
for ( int i = 0; i < projectBuildList.size(); i++ )
{
expectedLength += stringList.get( i ).length();
}
threadOutputMuxer.close();
final byte[] bytes = byteArrayOutputStream.toByteArray();
String result = new String( bytes );
assertEquals( result, expectedLength, bytes.length );
}
class Outputter
implements Callable<ProjectSegment>
{
private final ThreadOutputMuxer threadOutputMuxer;
private final ProjectSegment item;
private final String response;
Outputter( ThreadOutputMuxer threadOutputMuxer, ProjectSegment item, String response )
{
this.threadOutputMuxer = threadOutputMuxer;
this.item = item;
this.response = response;
}
public ProjectSegment call()
throws Exception
{
threadOutputMuxer.associateThreadWithProjectSegment( item );
System.out.print( response );
threadOutputMuxer.setThisModuleComplete( item );
return item;
}
}
private ProjectBuildList getProjectBuildList()
throws InvalidPluginDescriptorException, PluginVersionResolutionException, PluginDescriptorParsingException,
NoPluginFoundForPrefixException, MojoNotFoundException, PluginNotFoundException, PluginResolutionException,
LifecyclePhaseNotFoundException, LifecycleNotFoundException
{
final MavenSession session = ProjectDependencyGraphStub.getMavenSession();
return ProjectDependencyGraphStub.getProjectBuildList( session );
}
}
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