| 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 java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.CompletionService; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.ExecutorCompletionService; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.TimeUnit; |
| |
| import javax.inject.Inject; |
| import javax.inject.Named; |
| import javax.inject.Singleton; |
| |
| import org.apache.maven.execution.MavenSession; |
| import org.apache.maven.lifecycle.internal.BuildThreadFactory; |
| import org.apache.maven.lifecycle.internal.LifecycleModuleBuilder; |
| import org.apache.maven.lifecycle.internal.ProjectBuildList; |
| import org.apache.maven.lifecycle.internal.ProjectSegment; |
| import org.apache.maven.lifecycle.internal.ReactorBuildStatus; |
| import org.apache.maven.lifecycle.internal.ReactorContext; |
| import org.apache.maven.lifecycle.internal.TaskSegment; |
| import org.apache.maven.lifecycle.internal.builder.Builder; |
| import org.apache.maven.project.MavenProject; |
| import org.codehaus.plexus.logging.Logger; |
| |
| /** |
| * Builds the full lifecycle in weave-mode (phase by phase as opposed to project-by-project). |
| * <p> |
| * This builder uses a number of threads equal to the minimum of the degree of concurrency (which is the thread count |
| * set with <code>-T</code> on the command-line) and the number of projects to build. As such, building a single project |
| * will always result in a sequential build, regardless of the thread count. |
| * </p> |
| * <strong>NOTE:</strong> This class is not part of any public api and can be changed or deleted without prior notice. |
| * |
| * @since 3.0 |
| * @author Kristian Rosenvold |
| * Builds one or more lifecycles for a full module |
| * NOTE: This class is not part of any public api and can be changed or deleted without prior notice. |
| */ |
| @Named( "multithreaded" ) |
| @Singleton |
| public class MultiThreadedBuilder |
| implements Builder |
| { |
| |
| @Inject |
| private Logger logger; |
| |
| @Inject |
| private LifecycleModuleBuilder lifecycleModuleBuilder; |
| |
| public MultiThreadedBuilder() |
| { |
| } |
| |
| @Override |
| public void build( MavenSession session, ReactorContext reactorContext, ProjectBuildList projectBuilds, |
| List<TaskSegment> taskSegments, ReactorBuildStatus reactorBuildStatus ) |
| throws ExecutionException, InterruptedException |
| { |
| int nThreads = Math.min( session.getRequest().getDegreeOfConcurrency(), session.getProjects().size() ); |
| boolean parallel = nThreads >= 2; |
| // Propagate the parallel flag to the root session and all of the cloned sessions in each project segment |
| session.setParallel( parallel ); |
| for ( ProjectSegment segment : projectBuilds ) |
| { |
| segment.getSession().setParallel( parallel ); |
| } |
| ExecutorService executor = Executors.newFixedThreadPool( nThreads, new BuildThreadFactory() ); |
| CompletionService<ProjectSegment> service = new ExecutorCompletionService<>( executor ); |
| |
| // Currently disabled |
| ThreadOutputMuxer muxer = null; // new ThreadOutputMuxer( analyzer.getProjectBuilds(), System.out ); |
| |
| for ( TaskSegment taskSegment : taskSegments ) |
| { |
| ProjectBuildList segmentProjectBuilds = projectBuilds.getByTaskSegment( taskSegment ); |
| Map<MavenProject, ProjectSegment> projectBuildMap = projectBuilds.selectSegment( taskSegment ); |
| try |
| { |
| ConcurrencyDependencyGraph analyzer = |
| new ConcurrencyDependencyGraph( segmentProjectBuilds, |
| session.getProjectDependencyGraph() ); |
| multiThreadedProjectTaskSegmentBuild( analyzer, reactorContext, session, service, taskSegment, |
| projectBuildMap, muxer ); |
| if ( reactorContext.getReactorBuildStatus().isHalted() ) |
| { |
| break; |
| } |
| } |
| catch ( Exception e ) |
| { |
| session.getResult().addException( e ); |
| break; |
| } |
| |
| } |
| |
| executor.shutdown(); |
| executor.awaitTermination( Long.MAX_VALUE, TimeUnit.MILLISECONDS ); |
| } |
| |
| private void multiThreadedProjectTaskSegmentBuild( ConcurrencyDependencyGraph analyzer, |
| ReactorContext reactorContext, MavenSession rootSession, |
| CompletionService<ProjectSegment> service, |
| TaskSegment taskSegment, |
| Map<MavenProject, ProjectSegment> projectBuildList, |
| ThreadOutputMuxer muxer ) |
| { |
| |
| // schedule independent projects |
| for ( MavenProject mavenProject : analyzer.getRootSchedulableBuilds() ) |
| { |
| ProjectSegment projectSegment = projectBuildList.get( mavenProject ); |
| logger.debug( "Scheduling: " + projectSegment.getProject() ); |
| Callable<ProjectSegment> cb = |
| createBuildCallable( rootSession, projectSegment, reactorContext, taskSegment, muxer ); |
| service.submit( cb ); |
| } |
| |
| // for each finished project |
| for ( int i = 0; i < analyzer.getNumberOfBuilds(); i++ ) |
| { |
| try |
| { |
| ProjectSegment projectBuild = service.take().get(); |
| if ( reactorContext.getReactorBuildStatus().isHalted() ) |
| { |
| break; |
| } |
| |
| // MNG-6170: Only schedule other modules from reactor if we have more modules to build than one. |
| if ( analyzer.getNumberOfBuilds() > 1 ) |
| { |
| final List<MavenProject> newItemsThatCanBeBuilt = |
| analyzer.markAsFinished( projectBuild.getProject() ); |
| for ( MavenProject mavenProject : newItemsThatCanBeBuilt ) |
| { |
| ProjectSegment scheduledDependent = projectBuildList.get( mavenProject ); |
| logger.debug( "Scheduling: " + scheduledDependent ); |
| Callable<ProjectSegment> cb = |
| createBuildCallable( rootSession, scheduledDependent, reactorContext, taskSegment, muxer ); |
| service.submit( cb ); |
| } |
| } |
| } |
| catch ( InterruptedException e ) |
| { |
| rootSession.getResult().addException( e ); |
| break; |
| } |
| catch ( ExecutionException e ) |
| { |
| // TODO MNG-5766 changes likely made this redundant |
| rootSession.getResult().addException( e ); |
| break; |
| } |
| } |
| } |
| |
| private Callable<ProjectSegment> createBuildCallable( final MavenSession rootSession, |
| final ProjectSegment projectBuild, |
| final ReactorContext reactorContext, |
| final TaskSegment taskSegment, final ThreadOutputMuxer muxer ) |
| { |
| return () -> |
| { |
| // muxer.associateThreadWithProjectSegment( projectBuild ); |
| lifecycleModuleBuilder.buildProject( projectBuild.getSession(), rootSession, reactorContext, |
| projectBuild.getProject(), taskSegment ); |
| // muxer.setThisModuleComplete( projectBuild ); |
| |
| return projectBuild; |
| }; |
| } |
| } |