001 package org.apache.maven.plugin;
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
022 import java.util.ArrayList;
023 import java.util.Collections;
024 import java.util.HashMap;
025 import java.util.List;
026 import java.util.Map;
027
028 import org.apache.maven.model.Plugin;
029 import org.apache.maven.project.MavenProject;
030 import org.codehaus.plexus.component.annotations.Component;
031 import org.eclipse.aether.RepositorySystemSession;
032 import org.eclipse.aether.artifact.Artifact;
033 import org.eclipse.aether.graph.DependencyFilter;
034 import org.eclipse.aether.repository.LocalRepository;
035 import org.eclipse.aether.repository.RemoteRepository;
036 import org.eclipse.aether.repository.WorkspaceRepository;
037
038 /**
039 * @author Igor Fedorenko
040 * @author Benjamin Bentmann
041 */
042 @Component( role = PluginArtifactsCache.class )
043 public class DefaultPluginArtifactsCache
044 implements PluginArtifactsCache
045 {
046
047 private static class CacheKey
048 implements Key
049 {
050
051 private final Plugin plugin;
052
053 private final WorkspaceRepository workspace;
054
055 private final LocalRepository localRepo;
056
057 private final List<RemoteRepository> repositories;
058
059 private final DependencyFilter filter;
060
061 private final int hashCode;
062
063 public CacheKey( Plugin plugin, DependencyFilter extensionFilter, List<RemoteRepository> repositories,
064 RepositorySystemSession session )
065 {
066 this.plugin = plugin.clone();
067 workspace = CacheUtils.getWorkspace( session );
068 this.localRepo = session.getLocalRepository();
069 this.repositories = new ArrayList<RemoteRepository>( repositories.size() );
070 for ( RemoteRepository repository : repositories )
071 {
072 if ( repository.isRepositoryManager() )
073 {
074 this.repositories.addAll( repository.getMirroredRepositories() );
075 }
076 else
077 {
078 this.repositories.add( repository );
079 }
080 }
081 this.filter = extensionFilter;
082
083 int hash = 17;
084 hash = hash * 31 + CacheUtils.pluginHashCode( plugin );
085 hash = hash * 31 + hash( workspace );
086 hash = hash * 31 + hash( localRepo );
087 hash = hash * 31 + CacheUtils.repositoriesHashCode( repositories );
088 hash = hash * 31 + hash( extensionFilter );
089 this.hashCode = hash;
090 }
091
092 @Override
093 public String toString()
094 {
095 return plugin.getId();
096 }
097
098 @Override
099 public int hashCode()
100 {
101 return hashCode;
102 }
103
104 private static int hash( Object obj )
105 {
106 return obj != null ? obj.hashCode() : 0;
107 }
108
109 @Override
110 public boolean equals( Object o )
111 {
112 if ( o == this )
113 {
114 return true;
115 }
116
117 if ( !( o instanceof CacheKey ) )
118 {
119 return false;
120 }
121
122 CacheKey that = (CacheKey) o;
123
124 return CacheUtils.pluginEquals( plugin, that.plugin ) && eq( workspace, that.workspace )
125 && eq( localRepo, that.localRepo ) && CacheUtils.repositoriesEquals( repositories, that.repositories )
126 && eq( filter, that.filter );
127 }
128
129 private static <T> boolean eq( T s1, T s2 )
130 {
131 return s1 != null ? s1.equals( s2 ) : s2 == null;
132 }
133
134 }
135
136 protected final Map<Key, CacheRecord> cache = new HashMap<Key, CacheRecord>();
137
138 public Key createKey( Plugin plugin, DependencyFilter extensionFilter, List<RemoteRepository> repositories,
139 RepositorySystemSession session )
140 {
141 return new CacheKey( plugin, extensionFilter, repositories, session );
142 }
143
144 public CacheRecord get( Key key )
145 throws PluginResolutionException
146 {
147 CacheRecord cacheRecord = cache.get( key );
148
149 if ( cacheRecord != null && cacheRecord.exception != null )
150 {
151 throw cacheRecord.exception;
152 }
153
154 return cacheRecord;
155 }
156
157 public CacheRecord put( Key key, List<Artifact> pluginArtifacts )
158 {
159 if ( pluginArtifacts == null )
160 {
161 throw new NullPointerException();
162 }
163
164 assertUniqueKey( key );
165
166 CacheRecord record =
167 new CacheRecord( Collections.unmodifiableList( new ArrayList<Artifact>( pluginArtifacts ) ) );
168
169 cache.put( key, record );
170
171 return record;
172 }
173
174 protected void assertUniqueKey( Key key )
175 {
176 if ( cache.containsKey( key ) )
177 {
178 throw new IllegalStateException( "Duplicate artifact resolution result for plugin " + key );
179 }
180 }
181
182 public CacheRecord put( Key key, PluginResolutionException exception )
183 {
184 if ( exception == null )
185 {
186 throw new NullPointerException();
187 }
188
189 assertUniqueKey( key );
190
191 CacheRecord record = new CacheRecord( exception );
192
193 cache.put( key, record );
194
195 return record;
196 }
197
198 public void flush()
199 {
200 cache.clear();
201 }
202
203 protected static int pluginHashCode( Plugin plugin )
204 {
205 return CacheUtils.pluginHashCode( plugin );
206 }
207
208 protected static boolean pluginEquals( Plugin a, Plugin b )
209 {
210 return CacheUtils.pluginEquals( a, b );
211 }
212
213 public void register( MavenProject project, CacheRecord record )
214 {
215 // default cache does not track record usage
216 }
217
218 }