001 package org.apache.maven.lifecycle.internal;
002
003 /*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements. See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership. The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License. You may obtain a copy of the License at
011 *
012 * http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied. See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022 import org.apache.maven.execution.ExecutionEvent;
023 import org.apache.maven.execution.MavenExecutionRequest;
024 import org.apache.maven.execution.MavenExecutionResult;
025 import org.apache.maven.execution.MavenSession;
026 import org.apache.maven.lifecycle.DefaultLifecycles;
027 import org.apache.maven.lifecycle.MissingProjectException;
028 import org.apache.maven.lifecycle.NoGoalSpecifiedException;
029 import org.codehaus.plexus.component.annotations.Component;
030 import org.codehaus.plexus.component.annotations.Requirement;
031 import org.codehaus.plexus.logging.Logger;
032
033 import java.util.List;
034 import java.util.concurrent.CompletionService;
035 import java.util.concurrent.ExecutorCompletionService;
036 import java.util.concurrent.ExecutorService;
037 import java.util.concurrent.TimeUnit;
038
039 /**
040 * Starts the build life cycle
041 * @author Jason van Zyl
042 * @author Benjamin Bentmann
043 * @author Kristian Rosenvold
044 */
045 @Component( role = LifecycleStarter.class )
046 public class LifecycleStarter
047 {
048
049 @Requirement
050 private ExecutionEventCatapult eventCatapult;
051
052 @Requirement
053 private DefaultLifecycles defaultLifeCycles;
054
055 @Requirement
056 private Logger logger;
057
058 @Requirement
059 private LifecycleModuleBuilder lifecycleModuleBuilder;
060
061 @Requirement
062 private LifecycleWeaveBuilder lifeCycleWeaveBuilder;
063
064 @Requirement
065 private LifecycleThreadedBuilder lifecycleThreadedBuilder;
066
067 @Requirement
068 private BuildListCalculator buildListCalculator;
069
070 @Requirement
071 private LifecycleDebugLogger lifecycleDebugLogger;
072
073 @Requirement
074 private LifecycleTaskSegmentCalculator lifecycleTaskSegmentCalculator;
075
076 @Requirement
077 private ThreadConfigurationService threadConfigService;
078
079 public void execute( MavenSession session )
080 {
081 eventCatapult.fire( ExecutionEvent.Type.SessionStarted, session, null );
082
083 MavenExecutionResult result = session.getResult();
084
085 try
086 {
087 if ( !session.isUsingPOMsFromFilesystem() && lifecycleTaskSegmentCalculator.requiresProject( session ) )
088 {
089 throw new MissingProjectException( "The goal you specified requires a project to execute"
090 + " but there is no POM in this directory (" + session.getExecutionRootDirectory() + ")."
091 + " Please verify you invoked Maven from the correct directory." );
092 }
093
094 final MavenExecutionRequest executionRequest = session.getRequest();
095 boolean isThreaded = executionRequest.isThreadConfigurationPresent();
096 session.setParallel( isThreaded );
097
098 List<TaskSegment> taskSegments = lifecycleTaskSegmentCalculator.calculateTaskSegments( session );
099
100 ProjectBuildList projectBuilds = buildListCalculator.calculateProjectBuilds( session, taskSegments );
101
102 if ( projectBuilds.isEmpty() )
103 {
104 throw new NoGoalSpecifiedException( "No goals have been specified for this build."
105 + " You must specify a valid lifecycle phase or a goal in the format <plugin-prefix>:<goal> or"
106 + " <plugin-group-id>:<plugin-artifact-id>[:<plugin-version>]:<goal>."
107 + " Available lifecycle phases are: " + defaultLifeCycles.getLifecyclePhaseList() + "." );
108 }
109
110 ProjectIndex projectIndex = new ProjectIndex( session.getProjects() );
111
112 if ( logger.isDebugEnabled() )
113 {
114 lifecycleDebugLogger.debugReactorPlan( projectBuilds );
115 }
116
117 ClassLoader oldContextClassLoader = Thread.currentThread().getContextClassLoader();
118
119 ReactorBuildStatus reactorBuildStatus = new ReactorBuildStatus( session.getProjectDependencyGraph() );
120 ReactorContext callableContext =
121 new ReactorContext( result, projectIndex, oldContextClassLoader, reactorBuildStatus );
122
123 if ( isThreaded )
124 {
125 ExecutorService executor =
126 threadConfigService.getExecutorService( executionRequest.getThreadCount(),
127 executionRequest.isPerCoreThreadCount(),
128 session.getProjects().size() );
129 try
130 {
131
132 final boolean isWeaveMode = LifecycleWeaveBuilder.isWeaveMode( executionRequest );
133 if ( isWeaveMode )
134 {
135 lifecycleDebugLogger.logWeavePlan( session );
136 lifeCycleWeaveBuilder.build( projectBuilds, callableContext, taskSegments, session, executor,
137 reactorBuildStatus );
138 }
139 else
140 {
141 ConcurrencyDependencyGraph analyzer =
142 new ConcurrencyDependencyGraph( projectBuilds, session.getProjectDependencyGraph() );
143
144 CompletionService<ProjectSegment> service =
145 new ExecutorCompletionService<ProjectSegment>( executor );
146
147 lifecycleThreadedBuilder.build( session, callableContext, projectBuilds, taskSegments, analyzer,
148 service );
149 }
150 }
151 finally
152 {
153 executor.shutdown();
154 // If the builder has terminated with an exception we want to catch any stray threads before going
155 // to System.exit in the mavencli.
156 executor.awaitTermination( 5, TimeUnit.SECONDS ) ;
157 }
158 }
159 else
160 {
161 singleThreadedBuild( session, callableContext, projectBuilds, taskSegments, reactorBuildStatus );
162 }
163
164 }
165 catch ( Exception e )
166 {
167 result.addException( e );
168 }
169
170 eventCatapult.fire( ExecutionEvent.Type.SessionEnded, session, null );
171 }
172
173 private void singleThreadedBuild( MavenSession session, ReactorContext callableContext,
174 ProjectBuildList projectBuilds, List<TaskSegment> taskSegments,
175 ReactorBuildStatus reactorBuildStatus )
176 {
177 for ( TaskSegment taskSegment : taskSegments )
178 {
179 for ( ProjectSegment projectBuild : projectBuilds.getByTaskSegment( taskSegment ) )
180 {
181 try
182 {
183 lifecycleModuleBuilder.buildProject( session, callableContext, projectBuild.getProject(),
184 taskSegment );
185 if ( reactorBuildStatus.isHalted() )
186 {
187 break;
188 }
189 }
190 catch ( Exception e )
191 {
192 break; // Why are we just ignoring this exception? Are exceptions are being used for flow control
193 }
194
195 }
196 }
197 }
198 }