001package org.eclipse.aether.internal.impl;
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.ArrayList;
023import java.util.Collection;
024import static java.util.Objects.requireNonNull;
025import java.util.Set;
026
027import javax.inject.Inject;
028import javax.inject.Named;
029
030import org.eclipse.aether.RepositoryEvent;
031import org.eclipse.aether.RepositoryListener;
032import org.eclipse.aether.impl.RepositoryEventDispatcher;
033import org.eclipse.aether.spi.locator.Service;
034import org.eclipse.aether.spi.locator.ServiceLocator;
035import org.slf4j.Logger;
036import org.slf4j.LoggerFactory;
037
038/**
039 */
040@Named
041public class DefaultRepositoryEventDispatcher
042    implements RepositoryEventDispatcher, Service
043{
044
045    private static final Logger LOGGER = LoggerFactory.getLogger( DefaultRepositoryEventDispatcher.class );
046
047    private Collection<RepositoryListener> listeners = new ArrayList<RepositoryListener>();
048
049    public DefaultRepositoryEventDispatcher()
050    {
051        // enables no-arg constructor
052    }
053
054    @Inject
055    DefaultRepositoryEventDispatcher( Set<RepositoryListener> listeners )
056    {
057        setRepositoryListeners( listeners );
058    }
059
060    public DefaultRepositoryEventDispatcher addRepositoryListener( RepositoryListener listener )
061    {
062        this.listeners.add( requireNonNull( listener, "repository listener cannot be null" ) );
063        return this;
064    }
065
066    public DefaultRepositoryEventDispatcher setRepositoryListeners( Collection<RepositoryListener> listeners )
067    {
068        if ( listeners == null )
069        {
070            this.listeners = new ArrayList<RepositoryListener>();
071        }
072        else
073        {
074            this.listeners = listeners;
075        }
076        return this;
077    }
078
079    public void initService( ServiceLocator locator )
080    {
081        setRepositoryListeners( locator.getServices( RepositoryListener.class ) );
082    }
083
084    public void dispatch( RepositoryEvent event )
085    {
086        if ( !listeners.isEmpty() )
087        {
088            for ( RepositoryListener listener : listeners )
089            {
090                dispatch( event, listener );
091            }
092        }
093
094        RepositoryListener listener = event.getSession().getRepositoryListener();
095
096        if ( listener != null )
097        {
098            dispatch( event, listener );
099        }
100    }
101
102    private void dispatch( RepositoryEvent event, RepositoryListener listener )
103    {
104        try
105        {
106            switch ( event.getType() )
107            {
108                case ARTIFACT_DEPLOYED:
109                    listener.artifactDeployed( event );
110                    break;
111                case ARTIFACT_DEPLOYING:
112                    listener.artifactDeploying( event );
113                    break;
114                case ARTIFACT_DESCRIPTOR_INVALID:
115                    listener.artifactDescriptorInvalid( event );
116                    break;
117                case ARTIFACT_DESCRIPTOR_MISSING:
118                    listener.artifactDescriptorMissing( event );
119                    break;
120                case ARTIFACT_DOWNLOADED:
121                    listener.artifactDownloaded( event );
122                    break;
123                case ARTIFACT_DOWNLOADING:
124                    listener.artifactDownloading( event );
125                    break;
126                case ARTIFACT_INSTALLED:
127                    listener.artifactInstalled( event );
128                    break;
129                case ARTIFACT_INSTALLING:
130                    listener.artifactInstalling( event );
131                    break;
132                case ARTIFACT_RESOLVED:
133                    listener.artifactResolved( event );
134                    break;
135                case ARTIFACT_RESOLVING:
136                    listener.artifactResolving( event );
137                    break;
138                case METADATA_DEPLOYED:
139                    listener.metadataDeployed( event );
140                    break;
141                case METADATA_DEPLOYING:
142                    listener.metadataDeploying( event );
143                    break;
144                case METADATA_DOWNLOADED:
145                    listener.metadataDownloaded( event );
146                    break;
147                case METADATA_DOWNLOADING:
148                    listener.metadataDownloading( event );
149                    break;
150                case METADATA_INSTALLED:
151                    listener.metadataInstalled( event );
152                    break;
153                case METADATA_INSTALLING:
154                    listener.metadataInstalling( event );
155                    break;
156                case METADATA_INVALID:
157                    listener.metadataInvalid( event );
158                    break;
159                case METADATA_RESOLVED:
160                    listener.metadataResolved( event );
161                    break;
162                case METADATA_RESOLVING:
163                    listener.metadataResolving( event );
164                    break;
165                default:
166                    throw new IllegalStateException( "unknown repository event type " + event.getType() );
167            }
168        }
169        catch ( Exception e )
170        {
171            logError( e, listener );
172        }
173        catch ( LinkageError e )
174        {
175            logError( e, listener );
176        }
177    }
178
179    private void logError( Throwable e, Object listener )
180    {
181        String msg =
182            "Failed to dispatch repository event to " + listener.getClass().getCanonicalName() + ": " + e.getMessage();
183
184        if ( LOGGER.isDebugEnabled() )
185        {
186            LOGGER.warn( msg, e );
187        }
188        else
189        {
190            LOGGER.warn( msg );
191        }
192    }
193
194}