001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.eclipse.aether.internal.transport.wagon;
020
021import javax.inject.Inject;
022import javax.inject.Named;
023import javax.inject.Singleton;
024
025import org.apache.maven.wagon.Wagon;
026import org.codehaus.plexus.PlexusContainer;
027import org.eclipse.aether.transport.wagon.WagonProvider;
028
029import static java.util.Objects.requireNonNull;
030
031/**
032 * A wagon provider backed by a Plexus container and the wagons registered with this container.
033 */
034@Named("plexus")
035@Singleton
036public class PlexusWagonProvider implements WagonProvider {
037    private final PlexusContainer container;
038
039    /**
040     * Creates a wagon provider using the specified Plexus container.
041     *
042     * @param container The Plexus container instance to use, must not be {@code null}.
043     */
044    @Inject
045    public PlexusWagonProvider(final PlexusContainer container) {
046        this.container = requireNonNull(container, "plexus container cannot be null");
047    }
048
049    public Wagon lookup(String roleHint) throws Exception {
050        return container.lookup(Wagon.class, roleHint);
051    }
052
053    public void release(Wagon wagon) {
054        try {
055            if (wagon != null) {
056                container.release(wagon);
057            }
058        } catch (Exception e) {
059            // too bad
060        }
061    }
062}