001package org.apache.maven.plugin.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
022import java.util.concurrent.atomic.AtomicReference;
023import org.apache.maven.execution.MavenSession;
024import org.apache.maven.plugin.LegacySupport;
025import org.codehaus.plexus.component.annotations.Component;
026import org.eclipse.aether.RepositorySystemSession;
027
028/**
029 * Helps to provide backward-compatibility with plugins that use legacy components. <strong>Warning:</strong> This is an
030 * internal utility component that is only public for technical reasons, it is not part of the public API. In
031 * particular, this component can be changed or deleted without prior notice.
032 * 
033 * @since 3.0
034 * @author Benjamin Bentmann
035 */
036@Component( role = LegacySupport.class )
037public class DefaultLegacySupport
038    implements LegacySupport
039{
040
041    private static final ThreadLocal<AtomicReference<MavenSession>> SESSION = new InheritableThreadLocal<AtomicReference<MavenSession>>();
042
043    public void setSession( MavenSession session )
044    {
045        AtomicReference<MavenSession> reference = DefaultLegacySupport.SESSION.get();
046        if ( reference != null )
047        {
048            reference.set( null );
049        }
050
051        if ( session == null && reference != null )
052        {
053            DefaultLegacySupport.SESSION.remove();
054        }
055        else
056        {
057            DefaultLegacySupport.SESSION.set( new AtomicReference<MavenSession>( session ) );
058        }
059    }
060
061    public MavenSession getSession()
062    {
063        AtomicReference<MavenSession> currentSession = DefaultLegacySupport.SESSION.get();
064        return currentSession != null ? currentSession.get() : null;
065    }
066
067    public RepositorySystemSession getRepositorySession()
068    {
069        MavenSession session = getSession();
070        return ( session != null ) ? session.getRepositorySession() : null;
071    }
072
073}