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1   package org.apache.maven.repository.internal;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *   http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import java.io.File;
23  import java.io.FileInputStream;
24  import java.io.IOException;
25  import java.util.ArrayList;
26  import java.util.Collections;
27  import java.util.HashMap;
28  import java.util.List;
29  import java.util.Map;
30  
31  import javax.inject.Inject;
32  import javax.inject.Named;
33  
34  import org.apache.maven.artifact.repository.metadata.Snapshot;
35  import org.apache.maven.artifact.repository.metadata.SnapshotVersion;
36  import org.apache.maven.artifact.repository.metadata.Versioning;
37  import org.apache.maven.artifact.repository.metadata.io.xpp3.MetadataXpp3Reader;
38  import org.codehaus.plexus.component.annotations.Component;
39  import org.codehaus.plexus.component.annotations.Requirement;
40  import org.codehaus.plexus.util.IOUtil;
41  import org.codehaus.plexus.util.StringUtils;
42  import org.eclipse.aether.RepositoryCache;
43  import org.eclipse.aether.RepositoryEvent.EventType;
44  import org.eclipse.aether.RepositoryEvent;
45  import org.eclipse.aether.RepositorySystemSession;
46  import org.eclipse.aether.RequestTrace;
47  import org.eclipse.aether.SyncContext;
48  import org.eclipse.aether.artifact.Artifact;
49  import org.eclipse.aether.impl.MetadataResolver;
50  import org.eclipse.aether.impl.RepositoryEventDispatcher;
51  import org.eclipse.aether.impl.SyncContextFactory;
52  import org.eclipse.aether.impl.VersionResolver;
53  import org.eclipse.aether.internal.impl.CacheUtils;
54  import org.eclipse.aether.metadata.DefaultMetadata;
55  import org.eclipse.aether.metadata.Metadata;
56  import org.eclipse.aether.repository.ArtifactRepository;
57  import org.eclipse.aether.repository.LocalRepository;
58  import org.eclipse.aether.repository.RemoteRepository;
59  import org.eclipse.aether.repository.WorkspaceReader;
60  import org.eclipse.aether.repository.WorkspaceRepository;
61  import org.eclipse.aether.resolution.MetadataRequest;
62  import org.eclipse.aether.resolution.MetadataResult;
63  import org.eclipse.aether.resolution.VersionRequest;
64  import org.eclipse.aether.resolution.VersionResolutionException;
65  import org.eclipse.aether.resolution.VersionResult;
66  import org.eclipse.aether.spi.locator.Service;
67  import org.eclipse.aether.spi.locator.ServiceLocator;
68  import org.eclipse.aether.spi.log.Logger;
69  import org.eclipse.aether.spi.log.LoggerFactory;
70  import org.eclipse.aether.spi.log.NullLoggerFactory;
71  import org.eclipse.aether.util.ConfigUtils;
72  
73  /**
74   * @author Benjamin Bentmann
75   */
76  @Named
77  @Component( role = VersionResolver.class )
78  public class DefaultVersionResolver
79      implements VersionResolver, Service
80  {
81  
82      private static final String MAVEN_METADATA_XML = "maven-metadata.xml";
83  
84      private static final String RELEASE = "RELEASE";
85  
86      private static final String LATEST = "LATEST";
87  
88      private static final String SNAPSHOT = "SNAPSHOT";
89  
90      @SuppressWarnings( "unused" )
91      @Requirement( role = LoggerFactory.class )
92      private Logger logger = NullLoggerFactory.LOGGER;
93  
94      @Requirement
95      private MetadataResolver metadataResolver;
96  
97      @Requirement
98      private SyncContextFactory syncContextFactory;
99  
100     @Requirement
101     private RepositoryEventDispatcher repositoryEventDispatcher;
102 
103     public DefaultVersionResolver()
104     {
105         // enable no-arg constructor
106     }
107 
108     @Inject
109     DefaultVersionResolver( MetadataResolver metadataResolver, SyncContextFactory syncContextFactory,
110                             RepositoryEventDispatcher repositoryEventDispatcher, LoggerFactory loggerFactory )
111     {
112         setMetadataResolver( metadataResolver );
113         setSyncContextFactory( syncContextFactory );
114         setLoggerFactory( loggerFactory );
115         setRepositoryEventDispatcher( repositoryEventDispatcher );
116     }
117 
118     public void initService( ServiceLocator locator )
119     {
120         setLoggerFactory( locator.getService( LoggerFactory.class ) );
121         setMetadataResolver( locator.getService( MetadataResolver.class ) );
122         setSyncContextFactory( locator.getService( SyncContextFactory.class ) );
123         setRepositoryEventDispatcher( locator.getService( RepositoryEventDispatcher.class ) );
124     }
125 
126     public DefaultVersionResolver setLoggerFactory( LoggerFactory loggerFactory )
127     {
128         this.logger = NullLoggerFactory.getSafeLogger( loggerFactory, getClass() );
129         return this;
130     }
131 
132     void setLogger( LoggerFactory loggerFactory )
133     {
134         // plexus support
135         setLoggerFactory( loggerFactory );
136     }
137 
138     public DefaultVersionResolver setMetadataResolver( MetadataResolver metadataResolver )
139     {
140         if ( metadataResolver == null )
141         {
142             throw new IllegalArgumentException( "metadata resolver has not been specified" );
143         }
144         this.metadataResolver = metadataResolver;
145         return this;
146     }
147 
148     public DefaultVersionResolver setSyncContextFactory( SyncContextFactory syncContextFactory )
149     {
150         if ( syncContextFactory == null )
151         {
152             throw new IllegalArgumentException( "sync context factory has not been specified" );
153         }
154         this.syncContextFactory = syncContextFactory;
155         return this;
156     }
157 
158     public DefaultVersionResolver setRepositoryEventDispatcher( RepositoryEventDispatcher repositoryEventDispatcher )
159     {
160         if ( repositoryEventDispatcher == null )
161         {
162             throw new IllegalArgumentException( "repository event dispatcher has not been specified" );
163         }
164         this.repositoryEventDispatcher = repositoryEventDispatcher;
165         return this;
166     }
167 
168     public VersionResult resolveVersion( RepositorySystemSession session, VersionRequest request )
169         throws VersionResolutionException
170     {
171         RequestTrace trace = RequestTrace.newChild( request.getTrace(), request );
172 
173         Artifact artifact = request.getArtifact();
174 
175         String version = artifact.getVersion();
176 
177         VersionResult result = new VersionResult( request );
178 
179         Key cacheKey = null;
180         RepositoryCache cache = session.getCache();
181         if ( cache != null && !ConfigUtils.getBoolean( session, false, "aether.versionResolver.noCache" ) )
182         {
183             cacheKey = new Key( session, request );
184 
185             Object obj = cache.get( session, cacheKey );
186             if ( obj instanceof Record )
187             {
188                 Record record = (Record) obj;
189                 result.setVersion( record.version );
190                 result.setRepository( CacheUtils.getRepository( session, request.getRepositories(), record.repoClass,
191                                                                 record.repoId ) );
192                 return result;
193             }
194         }
195 
196         Metadata metadata;
197 
198         if ( RELEASE.equals( version ) )
199         {
200             metadata =
201                 new DefaultMetadata( artifact.getGroupId(), artifact.getArtifactId(), MAVEN_METADATA_XML,
202                                      Metadata.Nature.RELEASE );
203         }
204         else if ( LATEST.equals( version ) )
205         {
206             metadata =
207                 new DefaultMetadata( artifact.getGroupId(), artifact.getArtifactId(), MAVEN_METADATA_XML,
208                                      Metadata.Nature.RELEASE_OR_SNAPSHOT );
209         }
210         else if ( version.endsWith( SNAPSHOT ) )
211         {
212             WorkspaceReader workspace = session.getWorkspaceReader();
213             if ( workspace != null && workspace.findVersions( artifact ).contains( version ) )
214             {
215                 metadata = null;
216                 result.setRepository( workspace.getRepository() );
217             }
218             else
219             {
220                 metadata =
221                     new DefaultMetadata( artifact.getGroupId(), artifact.getArtifactId(), version, MAVEN_METADATA_XML,
222                                          Metadata.Nature.SNAPSHOT );
223             }
224         }
225         else
226         {
227             metadata = null;
228         }
229 
230         if ( metadata == null )
231         {
232             result.setVersion( version );
233         }
234         else
235         {
236             List<MetadataRequest> metadataRequests = new ArrayList<MetadataRequest>( request.getRepositories().size() );
237 
238             metadataRequests.add( new MetadataRequest( metadata, null, request.getRequestContext() ) );
239 
240             for ( RemoteRepository repository : request.getRepositories() )
241             {
242                 MetadataRequest metadataRequest =
243                     new MetadataRequest( metadata, repository, request.getRequestContext() );
244                 metadataRequest.setDeleteLocalCopyIfMissing( true );
245                 metadataRequest.setFavorLocalRepository( true );
246                 metadataRequest.setTrace( trace );
247                 metadataRequests.add( metadataRequest );
248             }
249 
250             List<MetadataResult> metadataResults = metadataResolver.resolveMetadata( session, metadataRequests );
251 
252             Map<String, VersionInfo> infos = new HashMap<String, VersionInfo>();
253 
254             for ( MetadataResult metadataResult : metadataResults )
255             {
256                 result.addException( metadataResult.getException() );
257 
258                 ArtifactRepository repository = metadataResult.getRequest().getRepository();
259                 if ( repository == null )
260                 {
261                     repository = session.getLocalRepository();
262                 }
263 
264                 Versioning versioning = readVersions( session, trace, metadataResult.getMetadata(), repository, result );
265                 merge( artifact, infos, versioning, repository );
266             }
267 
268             if ( RELEASE.equals( version ) )
269             {
270                 resolve( result, infos, RELEASE );
271             }
272             else if ( LATEST.equals( version ) )
273             {
274                 if ( !resolve( result, infos, LATEST ) )
275                 {
276                     resolve( result, infos, RELEASE );
277                 }
278 
279                 if ( result.getVersion() != null && result.getVersion().endsWith( SNAPSHOT ) )
280                 {
281                     VersionRequest subRequest = new VersionRequest();
282                     subRequest.setArtifact( artifact.setVersion( result.getVersion() ) );
283                     if ( result.getRepository() instanceof RemoteRepository )
284                     {
285                         subRequest.setRepositories( Collections.singletonList( (RemoteRepository) result.getRepository() ) );
286                     }
287                     else
288                     {
289                         subRequest.setRepositories( request.getRepositories() );
290                     }
291                     VersionResult subResult = resolveVersion( session, subRequest );
292                     result.setVersion( subResult.getVersion() );
293                     result.setRepository( subResult.getRepository() );
294                     for ( Exception exception : subResult.getExceptions() )
295                     {
296                         result.addException( exception );
297                     }
298                 }
299             }
300             else
301             {
302                 String key = SNAPSHOT + getKey( artifact.getClassifier(), artifact.getExtension() );
303                 merge( infos, SNAPSHOT, key );
304                 if ( !resolve( result, infos, key ) )
305                 {
306                     result.setVersion( version );
307                 }
308             }
309 
310             if ( StringUtils.isEmpty( result.getVersion() ) )
311             {
312                 throw new VersionResolutionException( result );
313             }
314         }
315 
316         if ( cacheKey != null && metadata != null && isSafelyCacheable( session, artifact ) )
317         {
318             cache.put( session, cacheKey, new Record( result.getVersion(), result.getRepository() ) );
319         }
320 
321         return result;
322     }
323 
324     private boolean resolve( VersionResult result, Map<String, VersionInfo> infos, String key )
325     {
326         VersionInfo info = infos.get( key );
327         if ( info != null )
328         {
329             result.setVersion( info.version );
330             result.setRepository( info.repository );
331         }
332         return info != null;
333     }
334 
335     private Versioning readVersions( RepositorySystemSession session, RequestTrace trace, Metadata metadata,
336                                      ArtifactRepository repository, VersionResult result )
337     {
338         Versioning versioning = null;
339 
340         FileInputStream fis = null;
341         try
342         {
343             if ( metadata != null )
344             {
345                 SyncContext syncContext = syncContextFactory.newInstance( session, true );
346 
347                 try
348                 {
349                     syncContext.acquire( null, Collections.singleton( metadata ) );
350 
351                     if ( metadata.getFile() != null && metadata.getFile().exists() )
352                     {
353                         fis = new FileInputStream( metadata.getFile() );
354                         org.apache.maven.artifact.repository.metadata.Metadata m =
355                             new MetadataXpp3Reader().read( fis, false );
356                         versioning = m.getVersioning();
357 
358                         /*
359                          * NOTE: Users occasionally misuse the id "local" for remote repos which screws up the metadata
360                          * of the local repository. This is especially troublesome during snapshot resolution so we try
361                          * to handle that gracefully.
362                          */
363                         if ( versioning != null && repository instanceof LocalRepository )
364                         {
365                             if ( versioning.getSnapshot() != null && versioning.getSnapshot().getBuildNumber() > 0 )
366                             {
367                                 Versioning repaired = new Versioning();
368                                 repaired.setLastUpdated( versioning.getLastUpdated() );
369                                 Snapshot snapshot = new Snapshot();
370                                 snapshot.setLocalCopy( true );
371                                 repaired.setSnapshot( snapshot );
372                                 versioning = repaired;
373 
374                                 throw new IOException( "Snapshot information corrupted with remote repository data"
375                                     + ", please verify that no remote repository uses the id '" + repository.getId()
376                                     + "'" );
377                             }
378                         }
379                     }
380                 }
381                 finally
382                 {
383                     syncContext.close();
384                 }
385             }
386         }
387         catch ( Exception e )
388         {
389             invalidMetadata( session, trace, metadata, repository, e );
390             result.addException( e );
391         }
392         finally
393         {
394             IOUtil.close( fis );
395         }
396 
397         return ( versioning != null ) ? versioning : new Versioning();
398     }
399 
400     private void invalidMetadata( RepositorySystemSession session, RequestTrace trace, Metadata metadata,
401                                   ArtifactRepository repository, Exception exception )
402     {
403         RepositoryEvent.Builder event = new RepositoryEvent.Builder( session, EventType.METADATA_INVALID );
404         event.setTrace( trace );
405         event.setMetadata( metadata );
406         event.setException( exception );
407         event.setRepository( repository );
408 
409         repositoryEventDispatcher.dispatch( event.build() );
410     }
411 
412     private void merge( Artifact artifact, Map<String, VersionInfo> infos, Versioning versioning,
413                         ArtifactRepository repository )
414     {
415         if ( StringUtils.isNotEmpty( versioning.getRelease() ) )
416         {
417             merge( RELEASE, infos, versioning.getLastUpdated(), versioning.getRelease(), repository );
418         }
419 
420         if ( StringUtils.isNotEmpty( versioning.getLatest() ) )
421         {
422             merge( LATEST, infos, versioning.getLastUpdated(), versioning.getLatest(), repository );
423         }
424 
425         for ( SnapshotVersion sv : versioning.getSnapshotVersions() )
426         {
427             if ( StringUtils.isNotEmpty( sv.getVersion() ) )
428             {
429                 String key = getKey( sv.getClassifier(), sv.getExtension() );
430                 merge( SNAPSHOT + key, infos, sv.getUpdated(), sv.getVersion(), repository );
431             }
432         }
433 
434         Snapshot snapshot = versioning.getSnapshot();
435         if ( snapshot != null && versioning.getSnapshotVersions().isEmpty() )
436         {
437             String version = artifact.getVersion();
438             if ( snapshot.getTimestamp() != null && snapshot.getBuildNumber() > 0 )
439             {
440                 String qualifier = snapshot.getTimestamp() + '-' + snapshot.getBuildNumber();
441                 version = version.substring( 0, version.length() - SNAPSHOT.length() ) + qualifier;
442             }
443             merge( SNAPSHOT, infos, versioning.getLastUpdated(), version, repository );
444         }
445     }
446 
447     private void merge( String key, Map<String, VersionInfo> infos, String timestamp, String version,
448                         ArtifactRepository repository )
449     {
450         VersionInfo info = infos.get( key );
451         if ( info == null )
452         {
453             info = new VersionInfo( timestamp, version, repository );
454             infos.put( key, info );
455         }
456         else if ( info.isOutdated( timestamp ) )
457         {
458             info.version = version;
459             info.repository = repository;
460             info.timestamp = timestamp;
461         }
462     }
463 
464     private void merge( Map<String, VersionInfo> infos, String srcKey, String dstKey )
465     {
466         VersionInfo srcInfo = infos.get( srcKey );
467         VersionInfo dstInfo = infos.get( dstKey );
468 
469         if ( dstInfo == null
470             || ( srcInfo != null && dstInfo.isOutdated( srcInfo.timestamp ) && srcInfo.repository != dstInfo.repository ) )
471         {
472             infos.put( dstKey, srcInfo );
473         }
474     }
475 
476     private String getKey( String classifier, String extension )
477     {
478         return StringUtils.clean( classifier ) + ':' + StringUtils.clean( extension );
479     }
480 
481     private boolean isSafelyCacheable( RepositorySystemSession session, Artifact artifact )
482     {
483         /*
484          * The workspace/reactor is in flux so we better not assume definitive information for any of its
485          * artifacts/projects.
486          */
487 
488         WorkspaceReader workspace = session.getWorkspaceReader();
489         if ( workspace == null )
490         {
491             return true;
492         }
493 
494         Artifact pomArtifact = ArtifactDescriptorUtils.toPomArtifact( artifact );
495 
496         return workspace.findArtifact( pomArtifact ) == null;
497     }
498 
499     private static class VersionInfo
500     {
501 
502         String timestamp;
503 
504         String version;
505 
506         ArtifactRepository repository;
507 
508         public VersionInfo( String timestamp, String version, ArtifactRepository repository )
509         {
510             this.timestamp = ( timestamp != null ) ? timestamp : "";
511             this.version = version;
512             this.repository = repository;
513         }
514 
515         public boolean isOutdated( String timestamp )
516         {
517             return timestamp != null && timestamp.compareTo( this.timestamp ) > 0;
518         }
519 
520     }
521 
522     private static class Key
523     {
524 
525         private final String groupId;
526 
527         private final String artifactId;
528 
529         private final String classifier;
530 
531         private final String extension;
532 
533         private final String version;
534 
535         private final String context;
536 
537         private final File localRepo;
538 
539         private final WorkspaceRepository workspace;
540 
541         private final List<RemoteRepository> repositories;
542 
543         private final int hashCode;
544 
545         public Key( RepositorySystemSession session, VersionRequest request )
546         {
547             Artifact artifact = request.getArtifact();
548             groupId = artifact.getGroupId();
549             artifactId = artifact.getArtifactId();
550             classifier = artifact.getClassifier();
551             extension = artifact.getExtension();
552             version = artifact.getVersion();
553             localRepo = session.getLocalRepository().getBasedir();
554             workspace = CacheUtils.getWorkspace( session );
555             repositories = new ArrayList<RemoteRepository>( request.getRepositories().size() );
556             boolean repoMan = false;
557             for ( RemoteRepository repository : request.getRepositories() )
558             {
559                 if ( repository.isRepositoryManager() )
560                 {
561                     repoMan = true;
562                     repositories.addAll( repository.getMirroredRepositories() );
563                 }
564                 else
565                 {
566                     repositories.add( repository );
567                 }
568             }
569             context = repoMan ? request.getRequestContext() : "";
570 
571             int hash = 17;
572             hash = hash * 31 + groupId.hashCode();
573             hash = hash * 31 + artifactId.hashCode();
574             hash = hash * 31 + classifier.hashCode();
575             hash = hash * 31 + extension.hashCode();
576             hash = hash * 31 + version.hashCode();
577             hash = hash * 31 + localRepo.hashCode();
578             hash = hash * 31 + CacheUtils.repositoriesHashCode( repositories );
579             hashCode = hash;
580         }
581 
582         @Override
583         public boolean equals( Object obj )
584         {
585             if ( obj == this )
586             {
587                 return true;
588             }
589             else if ( obj == null || !getClass().equals( obj.getClass() ) )
590             {
591                 return false;
592             }
593 
594             Key that = (Key) obj;
595             return artifactId.equals( that.artifactId ) && groupId.equals( that.groupId )
596                 && classifier.equals( that.classifier ) && extension.equals( that.extension )
597                 && version.equals( that.version ) && context.equals( that.context )
598                 && localRepo.equals( that.localRepo ) && CacheUtils.eq( workspace, that.workspace )
599                 && CacheUtils.repositoriesEquals( repositories, that.repositories );
600         }
601 
602         @Override
603         public int hashCode()
604         {
605             return hashCode;
606         }
607 
608     }
609 
610     private static class Record
611     {
612         final String version;
613 
614         final String repoId;
615 
616         final Class<?> repoClass;
617 
618         public Record( String version, ArtifactRepository repository )
619         {
620             this.version = version;
621             if ( repository != null )
622             {
623                 repoId = repository.getId();
624                 repoClass = repository.getClass();
625             }
626             else
627             {
628                 repoId = null;
629                 repoClass = null;
630             }
631         }
632     }
633 
634 }