| /* |
| * 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. |
| */ |
| package org.apache.maven.lifecycle.internal.builder.multithreaded; |
| |
| import javax.inject.Inject; |
| import javax.inject.Named; |
| import javax.inject.Singleton; |
| |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| 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 java.util.function.Function; |
| import java.util.stream.Collectors; |
| |
| 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.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * 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 |
| * 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 { |
| private final Logger logger = LoggerFactory.getLogger(getClass()); |
| |
| private final LifecycleModuleBuilder lifecycleModuleBuilder; |
| |
| @Inject |
| public MultiThreadedBuilder(LifecycleModuleBuilder lifecycleModuleBuilder) { |
| this.lifecycleModuleBuilder = lifecycleModuleBuilder; |
| } |
| |
| @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 > 1; |
| // 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) { |
| // gather artifactIds which are not unique so that the respective thread names can be extended with the groupId |
| Set<String> duplicateArtifactIds = projectBuildList.keySet().stream() |
| .map(MavenProject::getArtifactId) |
| .collect(Collectors.groupingBy(Function.identity(), Collectors.counting())) |
| .entrySet() |
| .stream() |
| .filter(p -> p.getValue() > 1) |
| .map(Map.Entry::getKey) |
| .collect(Collectors.toSet()); |
| |
| // 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, duplicateArtifactIds); |
| 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, |
| duplicateArtifactIds); |
| 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, |
| final Set<String> duplicateArtifactIds) { |
| return () -> { |
| final Thread currentThread = Thread.currentThread(); |
| final String originalThreadName = currentThread.getName(); |
| final MavenProject project = projectBuild.getProject(); |
| |
| final String threadNameSuffix = duplicateArtifactIds.contains(project.getArtifactId()) |
| ? project.getGroupId() + ":" + project.getArtifactId() |
| : project.getArtifactId(); |
| currentThread.setName("mvn-builder-" + threadNameSuffix); |
| |
| try { |
| // muxer.associateThreadWithProjectSegment( projectBuild ); |
| lifecycleModuleBuilder.buildProject( |
| projectBuild.getSession(), rootSession, reactorContext, project, taskSegment); |
| // muxer.setThisModuleComplete( projectBuild ); |
| |
| return projectBuild; |
| } finally { |
| currentThread.setName(originalThreadName); |
| } |
| }; |
| } |
| } |