001package org.eclipse.aether.internal.transport.wagon;
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 static java.util.Objects.requireNonNull;
023
024import org.apache.maven.wagon.Wagon;
025import org.codehaus.plexus.PlexusContainer;
026import org.eclipse.aether.transport.wagon.WagonProvider;
027
028import javax.inject.Inject;
029import javax.inject.Named;
030import javax.inject.Singleton;
031
032/**
033 * A wagon provider backed by a Plexus container and the wagons registered with this container.
034 */
035@Named( "plexus" )
036@Singleton
037public class PlexusWagonProvider
038    implements WagonProvider
039{
040    private PlexusContainer container;
041
042    /**
043     * Creates a wagon provider using the specified Plexus container.
044     *
045     * @param container The Plexus container instance to use, must not be {@code null}.
046     */
047    @Inject
048    public PlexusWagonProvider( final PlexusContainer container )
049    {
050        this.container = requireNonNull( container, "plexus container cannot be null" );
051    }
052
053    public Wagon lookup( String roleHint )
054        throws Exception
055    {
056        return container.lookup( Wagon.class, roleHint );
057    }
058
059    public void release( Wagon wagon )
060    {
061        try
062        {
063            if ( wagon != null )
064            {
065                container.release( wagon );
066            }
067        }
068        catch ( Exception e )
069        {
070            // too bad
071        }
072    }
073
074}