package org.apache.maven.lifecycle.internal;
/*
* 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 org.apache.maven.execution.ProjectDependencyGraph;
import org.apache.maven.project.MavenProject;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
/**
* Presents a view of the Dependency Graph that is suited for concurrent building.
*
* @since 3.0
* @author Kristian Rosenvold
* <p/>
* NOTE: This class is not part of any public api and can be changed or deleted without prior notice.
*/
public class ConcurrencyDependencyGraph
{
private final ProjectBuildList projectBuilds;
private final ProjectDependencyGraph projectDependencyGraph;
private final HashSet<MavenProject> finishedProjects = new HashSet<MavenProject>();
public ConcurrencyDependencyGraph( ProjectBuildList projectBuilds, ProjectDependencyGraph projectDependencyGraph )
{
this.projectDependencyGraph = projectDependencyGraph;
this.projectBuilds = projectBuilds;
}
public int getNumberOfBuilds()
{
return projectBuilds.size();
}
/**
* Gets all the builds that have no reactor-dependencies
*
* @return A list of all the initial builds
*/
public List<MavenProject> getRootSchedulableBuilds()
{
List<MavenProject> result = new ArrayList<MavenProject>();
for ( ProjectSegment projectBuild : projectBuilds )
{
if ( projectDependencyGraph.getUpstreamProjects( projectBuild.getProject(), false ).size() == 0 )
{
result.add( projectBuild.getProject() );
}
}
return result;
}
/**
* Marks the provided project as finished. Returns a list of
*
* @param mavenProject The project
* @return The list of builds that are eligible for starting now that the provided project is done
*/
public List<MavenProject> markAsFinished( MavenProject mavenProject )
{
finishedProjects.add( mavenProject );
return getSchedulableNewProcesses( mavenProject );
}
private List<MavenProject> getSchedulableNewProcesses( MavenProject finishedProject )
{
List<MavenProject> result = new ArrayList<MavenProject>();
// schedule dependent projects, if all of their requirements are met
for ( MavenProject dependentProject : projectDependencyGraph.getDownstreamProjects( finishedProject, false ) )
{
final List<MavenProject> upstreamProjects =
projectDependencyGraph.getUpstreamProjects( dependentProject, false );
if ( finishedProjects.containsAll( upstreamProjects ) )
{
result.add( dependentProject );
}
}
return result;
}
public ProjectBuildList getProjectBuilds()
{
return projectBuilds;
}
}