michael-o commented on code in PR #161: URL: https://github.com/apache/maven-resolver/pull/161#discussion_r845860495
########## maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/collect/DependencyCollectorDelegate.java: ########## @@ -0,0 +1,96 @@ +package org.eclipse.aether.internal.impl.collect; + +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +import org.eclipse.aether.impl.ArtifactDescriptorReader; +import org.eclipse.aether.impl.DependencyCollector; +import org.eclipse.aether.impl.RemoteRepositoryManager; +import org.eclipse.aether.impl.VersionRangeResolver; +import org.eclipse.aether.spi.locator.ServiceLocator; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import static java.util.Objects.requireNonNull; + +/** + * Helper class for delegate implementations, they should subclass this class. Review Comment: Should or must? If they don't they aren't registered, no? ########## maven-resolver-impl/src/main/java/org/eclipse/aether/impl/guice/AetherModule.java: ########## @@ -132,8 +135,14 @@ protected void configure() .to( DefaultRepositorySystem.class ).in( Singleton.class ); bind( ArtifactResolver.class ) // .to( DefaultArtifactResolver.class ).in( Singleton.class ); + bind( DependencyCollector.class ) // .to( DefaultDependencyCollector.class ).in( Singleton.class ); + bind( DependencyCollectorDelegate.class ).annotatedWith( Names.named( BfDependencyCollector.NAME ) ) Review Comment: Why delegate and not `DependencyCollector` directly? ########## maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/collect/bf/BfDependencyCollector.java: ########## @@ -0,0 +1,893 @@ +package org.eclipse.aether.internal.impl.collect.bf; + +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +import javax.inject.Inject; +import javax.inject.Named; +import javax.inject.Singleton; + +import java.util.ArrayDeque; +import java.util.ArrayList; +import java.util.Collection; +import java.util.Collections; +import java.util.HashMap; +import java.util.HashSet; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Map; +import java.util.Queue; + +import org.eclipse.aether.DefaultRepositorySystemSession; +import org.eclipse.aether.RepositoryException; +import org.eclipse.aether.RepositorySystemSession; +import org.eclipse.aether.RequestTrace; +import org.eclipse.aether.artifact.Artifact; +import org.eclipse.aether.artifact.ArtifactProperties; +import org.eclipse.aether.collection.CollectRequest; +import org.eclipse.aether.collection.CollectResult; +import org.eclipse.aether.collection.DependencyCollectionException; +import org.eclipse.aether.collection.DependencyGraphTransformer; +import org.eclipse.aether.collection.DependencyManagement; +import org.eclipse.aether.collection.DependencyManager; +import org.eclipse.aether.collection.DependencySelector; +import org.eclipse.aether.collection.DependencyTraverser; +import org.eclipse.aether.collection.VersionFilter; +import org.eclipse.aether.graph.DefaultDependencyNode; +import org.eclipse.aether.graph.Dependency; +import org.eclipse.aether.graph.DependencyNode; +import org.eclipse.aether.graph.Exclusion; +import org.eclipse.aether.impl.ArtifactDescriptorReader; +import org.eclipse.aether.impl.RemoteRepositoryManager; +import org.eclipse.aether.impl.VersionRangeResolver; +import org.eclipse.aether.internal.impl.collect.CachingArtifactTypeRegistry; +import org.eclipse.aether.internal.impl.collect.DataPool; +import org.eclipse.aether.internal.impl.collect.DefaultDependencyCollectionContext; +import org.eclipse.aether.internal.impl.collect.DefaultDependencyCycle; +import org.eclipse.aether.internal.impl.collect.DefaultDependencyGraphTransformationContext; +import org.eclipse.aether.internal.impl.collect.DefaultVersionFilterContext; +import org.eclipse.aether.internal.impl.collect.DependencyCollectorDelegate; +import org.eclipse.aether.repository.ArtifactRepository; +import org.eclipse.aether.repository.RemoteRepository; +import org.eclipse.aether.resolution.ArtifactDescriptorException; +import org.eclipse.aether.resolution.ArtifactDescriptorRequest; +import org.eclipse.aether.resolution.ArtifactDescriptorResult; +import org.eclipse.aether.resolution.VersionRangeRequest; +import org.eclipse.aether.resolution.VersionRangeResolutionException; +import org.eclipse.aether.resolution.VersionRangeResult; +import org.eclipse.aether.spi.locator.Service; +import org.eclipse.aether.util.ConfigUtils; +import org.eclipse.aether.util.graph.manager.DependencyManagerUtils; +import org.eclipse.aether.util.graph.transformer.TransformationContextKeys; +import org.eclipse.aether.version.Version; + +import static java.util.Objects.requireNonNull; +import static org.eclipse.aether.internal.impl.collect.DefaultDependencyCycle.find; + +/** + * Breadth-first {@link org.eclipse.aether.impl.DependencyCollector} + * + * @since 1.8.0 + */ +@Singleton +@Named( BfDependencyCollector.NAME ) +public class BfDependencyCollector + extends DependencyCollectorDelegate implements Service +{ + public static final String NAME = "bf"; + + /** + * The key in the repository session's {@link RepositorySystemSession#getConfigProperties() + * configuration properties} used to store a {@link Boolean} flag controlling the resolver's skip mode. + * + * @since 1.8.0 + */ + public static final String CONFIG_PROP_USE_SKIP = "aether.dependencyCollector.bf.useSkip"; + + /** + * The default value for {@link #CONFIG_PROP_USE_SKIP}, {@code true}. + * + * @since 1.8.0 + */ + public static final boolean CONFIG_PROP_USE_SKIP_DEFAULT = true; + + public BfDependencyCollector() + { + // enables default constructor + } + + @Inject + BfDependencyCollector( RemoteRepositoryManager remoteRepositoryManager, + ArtifactDescriptorReader artifactDescriptorReader, + VersionRangeResolver versionRangeResolver ) + { + super( remoteRepositoryManager, artifactDescriptorReader, versionRangeResolver ); + } + + @SuppressWarnings( "checkstyle:methodlength" ) + public CollectResult collectDependencies( RepositorySystemSession session, CollectRequest request ) + throws DependencyCollectionException + { + requireNonNull( session, "session cannot be null" ); + requireNonNull( request, "request cannot be null" ); + session = optimizeSession( session ); + + boolean useSkip = ConfigUtils.getBoolean( + session, CONFIG_PROP_USE_SKIP_DEFAULT, CONFIG_PROP_USE_SKIP + ); + if ( useSkip ) + { + logger.debug( "Collector skip mode enabled" ); + } + + RequestTrace trace = RequestTrace.newChild( request.getTrace(), request ); + + CollectResult result = new CollectResult( request ); + + DependencySelector depSelector = session.getDependencySelector(); + DependencyManager depManager = session.getDependencyManager(); + DependencyTraverser depTraverser = session.getDependencyTraverser(); + VersionFilter verFilter = session.getVersionFilter(); + + Dependency root = request.getRoot(); + List<RemoteRepository> repositories = request.getRepositories(); + List<Dependency> dependencies = request.getDependencies(); + List<Dependency> managedDependencies = request.getManagedDependencies(); + + Map<String, Object> stats = new LinkedHashMap<>(); + long time1 = System.nanoTime(); + + DefaultDependencyNode node; + if ( root != null ) + { + List<? extends Version> versions; + VersionRangeResult rangeResult; + try + { + VersionRangeRequest rangeRequest = + new VersionRangeRequest( root.getArtifact(), request.getRepositories(), + request.getRequestContext() ); + rangeRequest.setTrace( trace ); + rangeResult = versionRangeResolver.resolveVersionRange( session, rangeRequest ); + versions = filterVersions( root, rangeResult, verFilter, new DefaultVersionFilterContext( session ) ); + } + catch ( VersionRangeResolutionException e ) + { + result.addException( e ); + throw new DependencyCollectionException( result, e.getMessage() ); + } + + Version version = versions.get( versions.size() - 1 ); + root = root.setArtifact( root.getArtifact().setVersion( version.toString() ) ); + + ArtifactDescriptorResult descriptorResult; + try + { + ArtifactDescriptorRequest descriptorRequest = new ArtifactDescriptorRequest(); + descriptorRequest.setArtifact( root.getArtifact() ); + descriptorRequest.setRepositories( request.getRepositories() ); + descriptorRequest.setRequestContext( request.getRequestContext() ); + descriptorRequest.setTrace( trace ); + if ( isLackingDescriptor( root.getArtifact() ) ) + { + descriptorResult = new ArtifactDescriptorResult( descriptorRequest ); + } + else + { + descriptorResult = descriptorReader.readArtifactDescriptor( session, descriptorRequest ); + } + } + catch ( ArtifactDescriptorException e ) + { + result.addException( e ); + throw new DependencyCollectionException( result, e.getMessage() ); + } + + root = root.setArtifact( descriptorResult.getArtifact() ); + + if ( !session.isIgnoreArtifactDescriptorRepositories() ) + { + repositories = remoteRepositoryManager.aggregateRepositories( session, repositories, + descriptorResult.getRepositories(), + true ); + } + dependencies = mergeDeps( dependencies, descriptorResult.getDependencies() ); + managedDependencies = mergeDeps( managedDependencies, descriptorResult.getManagedDependencies() ); + + node = new DefaultDependencyNode( root ); + node.setRequestContext( request.getRequestContext() ); + node.setRelocations( descriptorResult.getRelocations() ); + node.setVersionConstraint( rangeResult.getVersionConstraint() ); + node.setVersion( version ); + node.setAliases( descriptorResult.getAliases() ); + node.setRepositories( request.getRepositories() ); + } + else + { + node = new DefaultDependencyNode( request.getRootArtifact() ); + node.setRequestContext( request.getRequestContext() ); + node.setRepositories( request.getRepositories() ); + } + + result.setRoot( node ); + + boolean traverse = root == null || depTraverser == null || depTraverser.traverseDependency( root ); + String errorPath = null; + if ( traverse && !dependencies.isEmpty() ) + { + DataPool pool = new DataPool( session ); + + DefaultDependencyCollectionContext context = + new DefaultDependencyCollectionContext( session, request.getRootArtifact(), root, managedDependencies ); + + DefaultVersionFilterContext versionContext = new DefaultVersionFilterContext( session ); + + Args args = + new Args( session, trace, pool, context, versionContext, request, + useSkip ? DependencyResolutionSkipper.defaultSkipper() + : DependencyResolutionSkipper.neverSkipper() ); + Results results = new Results( result, session ); + + DependencySelector rootDepSelector = + depSelector != null ? depSelector.deriveChildSelector( context ) : null; + DependencyManager rootDepManager = depManager != null ? depManager.deriveChildManager( context ) : null; + DependencyTraverser rootDepTraverser = + depTraverser != null ? depTraverser.deriveChildTraverser( context ) : null; + VersionFilter rootVerFilter = verFilter != null ? verFilter.deriveChildFilter( context ) : null; + + List<DependencyNode> parents = Collections.singletonList( node ); + for ( Dependency dependency : dependencies ) + { + args.dependencyProcessingQueue.add( + new DependencyProcessingContext( rootDepSelector, rootDepManager, rootDepTraverser, + rootVerFilter, repositories, managedDependencies, parents, + dependency ) ); + } + + while ( !args.dependencyProcessingQueue.isEmpty() ) + { + processDependency( args, results, args.dependencyProcessingQueue.remove(), Collections.emptyList(), + false ); + } + + args.skipper.report(); + errorPath = results.errorPath; + } + + long time2 = System.nanoTime(); + + DependencyGraphTransformer transformer = session.getDependencyGraphTransformer(); + if ( transformer != null ) + { + try + { + DefaultDependencyGraphTransformationContext context = + new DefaultDependencyGraphTransformationContext( session ); + context.put( TransformationContextKeys.STATS, stats ); + result.setRoot( transformer.transformGraph( node, context ) ); + } + catch ( RepositoryException e ) + { + result.addException( e ); + } + } + + long time3 = System.nanoTime(); + stats.put( "DefaultDependencyCollector.collectTime", time2 - time1 ); + stats.put( "DefaultDependencyCollector.transformTime", time3 - time2 ); + logger.debug( "Dependency collection stats {}", stats ); + + if ( errorPath != null ) + { + throw new DependencyCollectionException( result, "Failed to collect dependencies at " + errorPath ); + } + if ( !result.getExceptions().isEmpty() ) + { + throw new DependencyCollectionException( result ); + } + + return result; + } + + private static RepositorySystemSession optimizeSession( RepositorySystemSession session ) + { + DefaultRepositorySystemSession optimized = new DefaultRepositorySystemSession( session ); + optimized.setArtifactTypeRegistry( CachingArtifactTypeRegistry.newInstance( session ) ); + return optimized; + } + + private List<Dependency> mergeDeps( List<Dependency> dominant, List<Dependency> recessive ) + { + List<Dependency> result; + if ( dominant == null || dominant.isEmpty() ) + { + result = recessive; + } + else if ( recessive == null || recessive.isEmpty() ) + { + result = dominant; + } + else + { + int initialCapacity = dominant.size() + recessive.size(); + result = new ArrayList<>( initialCapacity ); + Collection<String> ids = new HashSet<>( initialCapacity, 1.0f ); + for ( Dependency dependency : dominant ) + { + ids.add( getId( dependency.getArtifact() ) ); + result.add( dependency ); + } + for ( Dependency dependency : recessive ) + { + if ( !ids.contains( getId( dependency.getArtifact() ) ) ) + { + result.add( dependency ); + } + } + } + return result; + } + + private static String getId( Artifact a ) + { + return a.getGroupId() + ':' + a.getArtifactId() + ':' + a.getClassifier() + ':' + a.getExtension(); + } + + @SuppressWarnings( "checkstyle:parameternumber" ) + private void processDependency( Args args, Results results, DependencyProcessingContext context, + List<Artifact> relocations, boolean disableVersionManagement ) + { + + if ( context.depSelector != null && !context.depSelector.selectDependency( context.dependency ) ) + { + return; + } + + PremanagedDependency preManaged = + PremanagedDependency.create( context.depManager, context.dependency, disableVersionManagement, + args.premanagedState ); + Dependency dependency = preManaged.managedDependency; + + boolean noDescriptor = isLackingDescriptor( dependency.getArtifact() ); + + boolean traverse = + !noDescriptor && ( context.depTraverser == null || context.depTraverser.traverseDependency( + dependency ) ); + + List<? extends Version> versions; + VersionRangeResult rangeResult; + try + { + VersionRangeRequest rangeRequest = createVersionRangeRequest( args, context.repositories, dependency ); + + rangeResult = cachedResolveRangeResult( rangeRequest, args.pool, args.session ); + + versions = filterVersions( dependency, rangeResult, context.verFilter, args.versionContext ); + } + catch ( VersionRangeResolutionException e ) + { + results.addException( dependency, e, context.parents ); + return; + } + + //Resolve newer version first to maximize benefits of skipper + Collections.reverse( versions ); + for ( Version version : versions ) + { + Artifact originalArtifact = dependency.getArtifact().setVersion( version.toString() ); + Dependency d = dependency.setArtifact( originalArtifact ); + + ArtifactDescriptorRequest descriptorRequest = + createArtifactDescriptorRequest( args, context.repositories, d ); + + final ArtifactDescriptorResult descriptorResult = + noDescriptor + ? new ArtifactDescriptorResult( descriptorRequest ) + : resolveCachedArtifactDescriptor( args.pool, descriptorRequest, args.session, + context.withDependency( d ), results ); + + if ( descriptorResult != null ) + { + d = d.setArtifact( descriptorResult.getArtifact() ); + + int cycleEntry = find( context.parents, d.getArtifact() ); + if ( cycleEntry >= 0 ) + { + results.addCycle( context.parents, cycleEntry, d ); + DependencyNode cycleNode = context.parents.get( cycleEntry ); + if ( cycleNode.getDependency() != null ) + { + DefaultDependencyNode child = + createDependencyNode( relocations, preManaged, rangeResult, version, d, + descriptorResult, cycleNode ); + context.getParent().getChildren().add( child ); + continue; + } + } + + if ( !descriptorResult.getRelocations().isEmpty() ) + { + boolean disableVersionManagementSubsequently = + originalArtifact.getGroupId().equals( d.getArtifact().getGroupId() ) + && originalArtifact.getArtifactId().equals( d.getArtifact().getArtifactId() ); + + processDependency( args, results, context.withDependency( d ), descriptorResult.getRelocations(), + disableVersionManagementSubsequently ); + return; + } + else + { + d = args.pool.intern( d.setArtifact( args.pool.intern( d.getArtifact() ) ) ); + + List<RemoteRepository> repos = + getRemoteRepositories( rangeResult.getRepository( version ), context.repositories ); + + DefaultDependencyNode child = + createDependencyNode( relocations, preManaged, rangeResult, version, d, + descriptorResult.getAliases(), repos, args.request.getRequestContext() ); + + context.getParent().getChildren().add( child ); + + boolean recurse = traverse && !descriptorResult.getDependencies().isEmpty(); + if ( recurse ) + { + doRecurse( args, context.withDependency( d ), descriptorResult, child ); + } + } + } + else + { + List<RemoteRepository> repos = + getRemoteRepositories( rangeResult.getRepository( version ), context.repositories ); + DefaultDependencyNode child = + createDependencyNode( relocations, preManaged, rangeResult, version, d, null, repos, + args.request.getRequestContext() ); + context.getParent().getChildren().add( child ); + } + } + } + + @SuppressWarnings( "checkstyle:parameternumber" ) + private void doRecurse( Args args, DependencyProcessingContext parentContext, + ArtifactDescriptorResult descriptorResult, DefaultDependencyNode child ) + { + DefaultDependencyCollectionContext context = args.collectionContext; + context.set( parentContext.dependency, descriptorResult.getManagedDependencies() ); + + DependencySelector childSelector = + parentContext.depSelector != null ? parentContext.depSelector.deriveChildSelector( context ) : null; + DependencyManager childManager = + parentContext.depManager != null ? parentContext.depManager.deriveChildManager( context ) : null; + DependencyTraverser childTraverser = + parentContext.depTraverser != null ? parentContext.depTraverser.deriveChildTraverser( context ) : null; + VersionFilter childFilter = + parentContext.verFilter != null ? parentContext.verFilter.deriveChildFilter( context ) : null; + + final List<RemoteRepository> childRepos = + args.ignoreRepos + ? parentContext.repositories + : remoteRepositoryManager.aggregateRepositories( args.session, parentContext.repositories, + descriptorResult.getRepositories(), true ); + + Object key = + args.pool.toKey( parentContext.dependency.getArtifact(), childRepos, childSelector, childManager, + childTraverser, childFilter ); + + List<DependencyNode> children = args.pool.getChildren( key ); + if ( children == null ) + { + boolean skipResolution = args.skipper.skipResolution( child, parentContext.parents ); + if ( !skipResolution ) + { + List<DependencyNode> parents = new ArrayList<>( parentContext.parents.size() + 1 ); + parents.addAll( parentContext.parents ); + parents.add( child ); + for ( Dependency dependency : descriptorResult.getDependencies() ) + { + args.dependencyProcessingQueue.add( + new DependencyProcessingContext( childSelector, childManager, childTraverser, childFilter, + childRepos, descriptorResult.getManagedDependencies(), parents, dependency ) ); + } + args.pool.putChildren( key, child.getChildren() ); + args.skipper.cache( child, parents ); + } + } + else + { + child.setChildren( children ); + } + } + + private ArtifactDescriptorResult resolveCachedArtifactDescriptor( DataPool pool, + ArtifactDescriptorRequest descriptorRequest, + RepositorySystemSession session, + DependencyProcessingContext context, + Results results ) + { + Object key = pool.toKey( descriptorRequest ); + ArtifactDescriptorResult descriptorResult = pool.getDescriptor( key, descriptorRequest ); + if ( descriptorResult == null ) + { + try + { + descriptorResult = descriptorReader.readArtifactDescriptor( session, descriptorRequest ); + pool.putDescriptor( key, descriptorResult ); + } + catch ( ArtifactDescriptorException e ) + { + results.addException( context.dependency, e, context.parents ); + pool.putDescriptor( key, e ); + return null; + } + + } + else if ( descriptorResult == DataPool.NO_DESCRIPTOR ) + { + return null; + } + + return descriptorResult; + } + + @SuppressWarnings( "checkstyle:parameternumber" ) + private static DefaultDependencyNode createDependencyNode( List<Artifact> relocations, + PremanagedDependency preManaged, + VersionRangeResult rangeResult, Version version, + Dependency d, Collection<Artifact> aliases, + List<RemoteRepository> repos, String requestContext ) + { + DefaultDependencyNode child = new DefaultDependencyNode( d ); + preManaged.applyTo( child ); + child.setRelocations( relocations ); + child.setVersionConstraint( rangeResult.getVersionConstraint() ); + child.setVersion( version ); + child.setAliases( aliases ); + child.setRepositories( repos ); + child.setRequestContext( requestContext ); + return child; + } + + private static DefaultDependencyNode createDependencyNode( List<Artifact> relocations, + PremanagedDependency preManaged, + VersionRangeResult rangeResult, Version version, + Dependency d, ArtifactDescriptorResult descriptorResult, + DependencyNode cycleNode ) + { + DefaultDependencyNode child = + createDependencyNode( relocations, preManaged, rangeResult, version, d, descriptorResult.getAliases(), + cycleNode.getRepositories(), cycleNode.getRequestContext() ); + child.setChildren( cycleNode.getChildren() ); + return child; + } + + private static ArtifactDescriptorRequest createArtifactDescriptorRequest( Args args, + List<RemoteRepository> repositories, + Dependency d ) + { + ArtifactDescriptorRequest descriptorRequest = new ArtifactDescriptorRequest(); + descriptorRequest.setArtifact( d.getArtifact() ); + descriptorRequest.setRepositories( repositories ); + descriptorRequest.setRequestContext( args.request.getRequestContext() ); + descriptorRequest.setTrace( args.trace ); + return descriptorRequest; + } + + private static VersionRangeRequest createVersionRangeRequest( Args args, List<RemoteRepository> repositories, + Dependency dependency ) + { + VersionRangeRequest rangeRequest = new VersionRangeRequest(); + rangeRequest.setArtifact( dependency.getArtifact() ); + rangeRequest.setRepositories( repositories ); + rangeRequest.setRequestContext( args.request.getRequestContext() ); + rangeRequest.setTrace( args.trace ); + return rangeRequest; + } + + private VersionRangeResult cachedResolveRangeResult( VersionRangeRequest rangeRequest, DataPool pool, + RepositorySystemSession session ) + throws VersionRangeResolutionException + { + Object key = pool.toKey( rangeRequest ); + VersionRangeResult rangeResult = pool.getConstraint( key, rangeRequest ); + if ( rangeResult == null ) + { + rangeResult = versionRangeResolver.resolveVersionRange( session, rangeRequest ); + pool.putConstraint( key, rangeResult ); + } + return rangeResult; + } + + private static boolean isLackingDescriptor( Artifact artifact ) + { + return artifact.getProperty( ArtifactProperties.LOCAL_PATH, null ) != null; + } + + private static List<RemoteRepository> getRemoteRepositories( ArtifactRepository repository, + List<RemoteRepository> repositories ) + { + if ( repository instanceof RemoteRepository ) + { + return Collections.singletonList( (RemoteRepository) repository ); + } + if ( repository != null ) + { + return Collections.emptyList(); + } + return repositories; + } + + private static List<? extends Version> filterVersions( Dependency dependency, VersionRangeResult rangeResult, + VersionFilter verFilter, + DefaultVersionFilterContext verContext ) + throws VersionRangeResolutionException + { + if ( rangeResult.getVersions().isEmpty() ) + { + throw new VersionRangeResolutionException( rangeResult, + "No versions available for " + dependency.getArtifact() + + " within specified range" ); + } + + List<? extends Version> versions; + if ( verFilter != null && rangeResult.getVersionConstraint().getRange() != null ) + { + verContext.set( dependency, rangeResult ); + try + { + verFilter.filterVersions( verContext ); + } + catch ( RepositoryException e ) + { + throw new VersionRangeResolutionException( rangeResult, + "Failed to filter versions for " + dependency.getArtifact() + + ": " + e.getMessage(), e ); Review Comment: Let's drop `e.getMessage()`, it is duplicated. ########## src/site/markdown/configuration.md: ########## @@ -42,9 +42,10 @@ Option | Type | Description | Default Value | Supports Repo ID Suffix `aether.connector.smartChecksums` | boolean | Flag indicating that instead of comparing the external checksum fetched from the remote repo with the calculated one, it should try to extract the reference checksum from the actual artifact requests's response headers (several (strategies supported)[included-checksum-strategies.html]). This only works for transport-http transport. | `true` | no `aether.connector.userAgent` | String | The user agent that repository connectors should report to servers. | `"Aether"` | no `aether.connector.wagon.config` | Object | The configuration to use for the Wagon provider. | - | yes (must be used) -`aether.dependencyCollector.useSkip` | boolean | Flag controlling whether to skip resolving duplicate/conflicting nodes during the dependency collection process. | `true` | no `aether.dependencyCollector.maxCycles` | int | Only up to the given amount cyclic dependencies are emitted. | `10` | no `aether.dependencyCollector.maxExceptions` | int | Only exceptions up to the number given in this configuration property are emitted. Exceptions which exceed that number are swallowed. | `50` | no +`aether.dependencyCollector.impl` | String | The name of the dependency collector implementation to use: depth-first (original) named `df`, and breadth-first (new in 1.8) named `bf`. Both collectors produce equivalent results, but they may differ performance wise, depending on project being applied to. Our experience shows that existing `df` is well suited for smaller to medium size projects, while `bf` may perform better on huge projects with many dependencies. Experiment (and come back to us!) to figure out which one suits you the better. | `"df"` | no Review Comment: 1.8.0 ########## maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/collect/bf/BfDependencyCollector.java: ########## @@ -0,0 +1,893 @@ +package org.eclipse.aether.internal.impl.collect.bf; + +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +import javax.inject.Inject; +import javax.inject.Named; +import javax.inject.Singleton; + +import java.util.ArrayDeque; +import java.util.ArrayList; +import java.util.Collection; +import java.util.Collections; +import java.util.HashMap; +import java.util.HashSet; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Map; +import java.util.Queue; + +import org.eclipse.aether.DefaultRepositorySystemSession; +import org.eclipse.aether.RepositoryException; +import org.eclipse.aether.RepositorySystemSession; +import org.eclipse.aether.RequestTrace; +import org.eclipse.aether.artifact.Artifact; +import org.eclipse.aether.artifact.ArtifactProperties; +import org.eclipse.aether.collection.CollectRequest; +import org.eclipse.aether.collection.CollectResult; +import org.eclipse.aether.collection.DependencyCollectionException; +import org.eclipse.aether.collection.DependencyGraphTransformer; +import org.eclipse.aether.collection.DependencyManagement; +import org.eclipse.aether.collection.DependencyManager; +import org.eclipse.aether.collection.DependencySelector; +import org.eclipse.aether.collection.DependencyTraverser; +import org.eclipse.aether.collection.VersionFilter; +import org.eclipse.aether.graph.DefaultDependencyNode; +import org.eclipse.aether.graph.Dependency; +import org.eclipse.aether.graph.DependencyNode; +import org.eclipse.aether.graph.Exclusion; +import org.eclipse.aether.impl.ArtifactDescriptorReader; +import org.eclipse.aether.impl.RemoteRepositoryManager; +import org.eclipse.aether.impl.VersionRangeResolver; +import org.eclipse.aether.internal.impl.collect.CachingArtifactTypeRegistry; +import org.eclipse.aether.internal.impl.collect.DataPool; +import org.eclipse.aether.internal.impl.collect.DefaultDependencyCollectionContext; +import org.eclipse.aether.internal.impl.collect.DefaultDependencyCycle; +import org.eclipse.aether.internal.impl.collect.DefaultDependencyGraphTransformationContext; +import org.eclipse.aether.internal.impl.collect.DefaultVersionFilterContext; +import org.eclipse.aether.internal.impl.collect.DependencyCollectorDelegate; +import org.eclipse.aether.repository.ArtifactRepository; +import org.eclipse.aether.repository.RemoteRepository; +import org.eclipse.aether.resolution.ArtifactDescriptorException; +import org.eclipse.aether.resolution.ArtifactDescriptorRequest; +import org.eclipse.aether.resolution.ArtifactDescriptorResult; +import org.eclipse.aether.resolution.VersionRangeRequest; +import org.eclipse.aether.resolution.VersionRangeResolutionException; +import org.eclipse.aether.resolution.VersionRangeResult; +import org.eclipse.aether.spi.locator.Service; +import org.eclipse.aether.util.ConfigUtils; +import org.eclipse.aether.util.graph.manager.DependencyManagerUtils; +import org.eclipse.aether.util.graph.transformer.TransformationContextKeys; +import org.eclipse.aether.version.Version; + +import static java.util.Objects.requireNonNull; +import static org.eclipse.aether.internal.impl.collect.DefaultDependencyCycle.find; + +/** + * Breadth-first {@link org.eclipse.aether.impl.DependencyCollector} + * + * @since 1.8.0 + */ +@Singleton +@Named( BfDependencyCollector.NAME ) +public class BfDependencyCollector + extends DependencyCollectorDelegate implements Service +{ + public static final String NAME = "bf"; + + /** + * The key in the repository session's {@link RepositorySystemSession#getConfigProperties() + * configuration properties} used to store a {@link Boolean} flag controlling the resolver's skip mode. + * + * @since 1.8.0 + */ + public static final String CONFIG_PROP_USE_SKIP = "aether.dependencyCollector.bf.useSkip"; Review Comment: I think this should be `.skipper` since we don't use imperative verbs in other boolean flags. ########## maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/collect/bf/DependencyResolutionSkipper.java: ########## @@ -0,0 +1,359 @@ +package org.eclipse.aether.internal.impl.collect.bf; + +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +import org.eclipse.aether.artifact.Artifact; +import org.eclipse.aether.graph.DependencyNode; +import org.eclipse.aether.util.artifact.ArtifactIdUtils; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.util.HashMap; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Map; +import java.util.concurrent.atomic.AtomicInteger; + +/** + * A skipper that determines whether to skip resolving given node during the dependency collection. + * Internal helper for {@link BfDependencyCollector}. + * + * @since 1.8.0 + */ +abstract class DependencyResolutionSkipper +{ + /** + * Check whether the resolution of current node can be skipped before resolving. + * + * @param node Current node + * @param parents All parent nodes of current node + * + * @return {@code true} if the node can be skipped for resolution, {@code false} if resolution required. + */ + abstract boolean skipResolution( DependencyNode node, List<DependencyNode> parents ); + + /** + * Cache the resolution result when a node is resolved by @See DependencyCollector after resolution. Review Comment: `@See` is broken ########## maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/collect/df/DfDependencyCollector.java: ########## @@ -0,0 +1,866 @@ +package org.eclipse.aether.internal.impl.collect.df; + +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +import java.util.ArrayList; +import java.util.Collection; +import java.util.Collections; +import java.util.HashMap; +import java.util.HashSet; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Map; +import static java.util.Objects.requireNonNull; + +import javax.inject.Inject; +import javax.inject.Named; +import javax.inject.Singleton; + +import org.eclipse.aether.DefaultRepositorySystemSession; +import org.eclipse.aether.RepositoryException; +import org.eclipse.aether.RepositorySystemSession; +import org.eclipse.aether.RequestTrace; +import org.eclipse.aether.artifact.Artifact; +import org.eclipse.aether.artifact.ArtifactProperties; +import org.eclipse.aether.collection.CollectRequest; +import org.eclipse.aether.collection.CollectResult; +import org.eclipse.aether.collection.DependencyCollectionException; +import org.eclipse.aether.collection.DependencyGraphTransformer; +import org.eclipse.aether.collection.DependencyManagement; +import org.eclipse.aether.collection.DependencyManager; +import org.eclipse.aether.collection.DependencySelector; +import org.eclipse.aether.collection.DependencyTraverser; +import org.eclipse.aether.collection.VersionFilter; +import org.eclipse.aether.graph.DefaultDependencyNode; +import org.eclipse.aether.graph.Dependency; +import org.eclipse.aether.graph.DependencyNode; +import org.eclipse.aether.graph.Exclusion; +import org.eclipse.aether.impl.ArtifactDescriptorReader; +import org.eclipse.aether.impl.RemoteRepositoryManager; +import org.eclipse.aether.impl.VersionRangeResolver; +import org.eclipse.aether.internal.impl.collect.CachingArtifactTypeRegistry; +import org.eclipse.aether.internal.impl.collect.DataPool; +import org.eclipse.aether.internal.impl.collect.DefaultDependencyCollectionContext; +import org.eclipse.aether.internal.impl.collect.DefaultDependencyCycle; +import org.eclipse.aether.internal.impl.collect.DefaultDependencyGraphTransformationContext; +import org.eclipse.aether.internal.impl.collect.DefaultVersionFilterContext; +import org.eclipse.aether.internal.impl.collect.DependencyCollectorDelegate; +import org.eclipse.aether.repository.ArtifactRepository; +import org.eclipse.aether.repository.RemoteRepository; +import org.eclipse.aether.resolution.ArtifactDescriptorException; +import org.eclipse.aether.resolution.ArtifactDescriptorRequest; +import org.eclipse.aether.resolution.ArtifactDescriptorResult; +import org.eclipse.aether.resolution.VersionRangeRequest; +import org.eclipse.aether.resolution.VersionRangeResolutionException; +import org.eclipse.aether.resolution.VersionRangeResult; +import org.eclipse.aether.spi.locator.Service; +import org.eclipse.aether.util.ConfigUtils; +import org.eclipse.aether.util.graph.manager.DependencyManagerUtils; +import org.eclipse.aether.util.graph.transformer.TransformationContextKeys; +import org.eclipse.aether.version.Version; + +/** + * Depth-first {@link org.eclipse.aether.impl.DependencyCollector} (the "original" default). Originally + * this class was located a package higher (as "default" implementation). + * + * @since 1.8.0 + */ +@Singleton +@Named( DfDependencyCollector.NAME ) +public class DfDependencyCollector + extends DependencyCollectorDelegate implements Service +{ + public static final String NAME = "df"; + + public DfDependencyCollector() + { + // enables default constructor + } + + @Inject + DfDependencyCollector( RemoteRepositoryManager remoteRepositoryManager, + ArtifactDescriptorReader artifactDescriptorReader, + VersionRangeResolver versionRangeResolver ) + { + super( remoteRepositoryManager, artifactDescriptorReader, versionRangeResolver ); + } + + @SuppressWarnings( "checkstyle:methodlength" ) + public CollectResult collectDependencies( RepositorySystemSession session, CollectRequest request ) + throws DependencyCollectionException + { + requireNonNull( session, "session cannot be null" ); + requireNonNull( request, "request cannot be null" ); + session = optimizeSession( session ); + + RequestTrace trace = RequestTrace.newChild( request.getTrace(), request ); + + CollectResult result = new CollectResult( request ); + + DependencySelector depSelector = session.getDependencySelector(); + DependencyManager depManager = session.getDependencyManager(); + DependencyTraverser depTraverser = session.getDependencyTraverser(); + VersionFilter verFilter = session.getVersionFilter(); + + Dependency root = request.getRoot(); + List<RemoteRepository> repositories = request.getRepositories(); + List<Dependency> dependencies = request.getDependencies(); + List<Dependency> managedDependencies = request.getManagedDependencies(); + + Map<String, Object> stats = new LinkedHashMap<>(); + long time1 = System.nanoTime(); + + DefaultDependencyNode node; + if ( root != null ) + { + List<? extends Version> versions; + VersionRangeResult rangeResult; + try + { + VersionRangeRequest rangeRequest = + new VersionRangeRequest( root.getArtifact(), request.getRepositories(), + request.getRequestContext() ); + rangeRequest.setTrace( trace ); + rangeResult = versionRangeResolver.resolveVersionRange( session, rangeRequest ); + versions = filterVersions( root, rangeResult, verFilter, new DefaultVersionFilterContext( session ) ); + } + catch ( VersionRangeResolutionException e ) + { + result.addException( e ); + throw new DependencyCollectionException( result, e.getMessage() ); + } + + Version version = versions.get( versions.size() - 1 ); + root = root.setArtifact( root.getArtifact().setVersion( version.toString() ) ); + + ArtifactDescriptorResult descriptorResult; + try + { + ArtifactDescriptorRequest descriptorRequest = new ArtifactDescriptorRequest(); + descriptorRequest.setArtifact( root.getArtifact() ); + descriptorRequest.setRepositories( request.getRepositories() ); + descriptorRequest.setRequestContext( request.getRequestContext() ); + descriptorRequest.setTrace( trace ); + if ( isLackingDescriptor( root.getArtifact() ) ) + { + descriptorResult = new ArtifactDescriptorResult( descriptorRequest ); + } + else + { + descriptorResult = descriptorReader.readArtifactDescriptor( session, descriptorRequest ); + } + } + catch ( ArtifactDescriptorException e ) + { + result.addException( e ); + throw new DependencyCollectionException( result, e.getMessage() ); + } + + root = root.setArtifact( descriptorResult.getArtifact() ); + + if ( !session.isIgnoreArtifactDescriptorRepositories() ) + { + repositories = remoteRepositoryManager.aggregateRepositories( session, repositories, + descriptorResult.getRepositories(), + true ); + } + dependencies = mergeDeps( dependencies, descriptorResult.getDependencies() ); + managedDependencies = mergeDeps( managedDependencies, descriptorResult.getManagedDependencies() ); + + node = new DefaultDependencyNode( root ); + node.setRequestContext( request.getRequestContext() ); + node.setRelocations( descriptorResult.getRelocations() ); + node.setVersionConstraint( rangeResult.getVersionConstraint() ); + node.setVersion( version ); + node.setAliases( descriptorResult.getAliases() ); + node.setRepositories( request.getRepositories() ); + } + else + { + node = new DefaultDependencyNode( request.getRootArtifact() ); + node.setRequestContext( request.getRequestContext() ); + node.setRepositories( request.getRepositories() ); + } + + result.setRoot( node ); + + boolean traverse = root == null || depTraverser == null || depTraverser.traverseDependency( root ); + String errorPath = null; + if ( traverse && !dependencies.isEmpty() ) + { + DataPool pool = new DataPool( session ); + + NodeStack nodes = new NodeStack(); + nodes.push( node ); + + DefaultDependencyCollectionContext context = + new DefaultDependencyCollectionContext( session, request.getRootArtifact(), root, managedDependencies ); + + DefaultVersionFilterContext versionContext = new DefaultVersionFilterContext( session ); + + Args args = new Args( session, trace, pool, nodes, context, versionContext, request ); + Results results = new Results( result, session ); + + process( args, results, dependencies, repositories, + depSelector != null ? depSelector.deriveChildSelector( context ) : null, + depManager != null ? depManager.deriveChildManager( context ) : null, + depTraverser != null ? depTraverser.deriveChildTraverser( context ) : null, + verFilter != null ? verFilter.deriveChildFilter( context ) : null ); + + errorPath = results.errorPath; + } + + long time2 = System.nanoTime(); + + DependencyGraphTransformer transformer = session.getDependencyGraphTransformer(); + if ( transformer != null ) + { + try + { + DefaultDependencyGraphTransformationContext context = + new DefaultDependencyGraphTransformationContext( session ); + context.put( TransformationContextKeys.STATS, stats ); + result.setRoot( transformer.transformGraph( node, context ) ); + } + catch ( RepositoryException e ) + { + result.addException( e ); + } + } + + long time3 = System.nanoTime(); + stats.put( "DefaultDependencyCollector.collectTime", time2 - time1 ); + stats.put( "DefaultDependencyCollector.transformTime", time3 - time2 ); + logger.debug( "Dependency collection stats {}", stats ); Review Comment: Same here. Plus, `DefaultDependencyCollector` isn't correct anymore. ########## maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/collect/bf/BfDependencyCollector.java: ########## @@ -0,0 +1,893 @@ +package org.eclipse.aether.internal.impl.collect.bf; + +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +import javax.inject.Inject; +import javax.inject.Named; +import javax.inject.Singleton; + +import java.util.ArrayDeque; +import java.util.ArrayList; +import java.util.Collection; +import java.util.Collections; +import java.util.HashMap; +import java.util.HashSet; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Map; +import java.util.Queue; + +import org.eclipse.aether.DefaultRepositorySystemSession; +import org.eclipse.aether.RepositoryException; +import org.eclipse.aether.RepositorySystemSession; +import org.eclipse.aether.RequestTrace; +import org.eclipse.aether.artifact.Artifact; +import org.eclipse.aether.artifact.ArtifactProperties; +import org.eclipse.aether.collection.CollectRequest; +import org.eclipse.aether.collection.CollectResult; +import org.eclipse.aether.collection.DependencyCollectionException; +import org.eclipse.aether.collection.DependencyGraphTransformer; +import org.eclipse.aether.collection.DependencyManagement; +import org.eclipse.aether.collection.DependencyManager; +import org.eclipse.aether.collection.DependencySelector; +import org.eclipse.aether.collection.DependencyTraverser; +import org.eclipse.aether.collection.VersionFilter; +import org.eclipse.aether.graph.DefaultDependencyNode; +import org.eclipse.aether.graph.Dependency; +import org.eclipse.aether.graph.DependencyNode; +import org.eclipse.aether.graph.Exclusion; +import org.eclipse.aether.impl.ArtifactDescriptorReader; +import org.eclipse.aether.impl.RemoteRepositoryManager; +import org.eclipse.aether.impl.VersionRangeResolver; +import org.eclipse.aether.internal.impl.collect.CachingArtifactTypeRegistry; +import org.eclipse.aether.internal.impl.collect.DataPool; +import org.eclipse.aether.internal.impl.collect.DefaultDependencyCollectionContext; +import org.eclipse.aether.internal.impl.collect.DefaultDependencyCycle; +import org.eclipse.aether.internal.impl.collect.DefaultDependencyGraphTransformationContext; +import org.eclipse.aether.internal.impl.collect.DefaultVersionFilterContext; +import org.eclipse.aether.internal.impl.collect.DependencyCollectorDelegate; +import org.eclipse.aether.repository.ArtifactRepository; +import org.eclipse.aether.repository.RemoteRepository; +import org.eclipse.aether.resolution.ArtifactDescriptorException; +import org.eclipse.aether.resolution.ArtifactDescriptorRequest; +import org.eclipse.aether.resolution.ArtifactDescriptorResult; +import org.eclipse.aether.resolution.VersionRangeRequest; +import org.eclipse.aether.resolution.VersionRangeResolutionException; +import org.eclipse.aether.resolution.VersionRangeResult; +import org.eclipse.aether.spi.locator.Service; +import org.eclipse.aether.util.ConfigUtils; +import org.eclipse.aether.util.graph.manager.DependencyManagerUtils; +import org.eclipse.aether.util.graph.transformer.TransformationContextKeys; +import org.eclipse.aether.version.Version; + +import static java.util.Objects.requireNonNull; +import static org.eclipse.aether.internal.impl.collect.DefaultDependencyCycle.find; + +/** + * Breadth-first {@link org.eclipse.aether.impl.DependencyCollector} + * + * @since 1.8.0 + */ +@Singleton +@Named( BfDependencyCollector.NAME ) +public class BfDependencyCollector + extends DependencyCollectorDelegate implements Service +{ + public static final String NAME = "bf"; + + /** + * The key in the repository session's {@link RepositorySystemSession#getConfigProperties() + * configuration properties} used to store a {@link Boolean} flag controlling the resolver's skip mode. + * + * @since 1.8.0 + */ + public static final String CONFIG_PROP_USE_SKIP = "aether.dependencyCollector.bf.useSkip"; + + /** + * The default value for {@link #CONFIG_PROP_USE_SKIP}, {@code true}. + * + * @since 1.8.0 + */ + public static final boolean CONFIG_PROP_USE_SKIP_DEFAULT = true; + + public BfDependencyCollector() + { + // enables default constructor + } + + @Inject + BfDependencyCollector( RemoteRepositoryManager remoteRepositoryManager, + ArtifactDescriptorReader artifactDescriptorReader, + VersionRangeResolver versionRangeResolver ) + { + super( remoteRepositoryManager, artifactDescriptorReader, versionRangeResolver ); + } + + @SuppressWarnings( "checkstyle:methodlength" ) + public CollectResult collectDependencies( RepositorySystemSession session, CollectRequest request ) + throws DependencyCollectionException + { + requireNonNull( session, "session cannot be null" ); + requireNonNull( request, "request cannot be null" ); + session = optimizeSession( session ); + + boolean useSkip = ConfigUtils.getBoolean( + session, CONFIG_PROP_USE_SKIP_DEFAULT, CONFIG_PROP_USE_SKIP + ); + if ( useSkip ) + { + logger.debug( "Collector skip mode enabled" ); + } + + RequestTrace trace = RequestTrace.newChild( request.getTrace(), request ); + + CollectResult result = new CollectResult( request ); + + DependencySelector depSelector = session.getDependencySelector(); + DependencyManager depManager = session.getDependencyManager(); + DependencyTraverser depTraverser = session.getDependencyTraverser(); + VersionFilter verFilter = session.getVersionFilter(); + + Dependency root = request.getRoot(); + List<RemoteRepository> repositories = request.getRepositories(); + List<Dependency> dependencies = request.getDependencies(); + List<Dependency> managedDependencies = request.getManagedDependencies(); + + Map<String, Object> stats = new LinkedHashMap<>(); + long time1 = System.nanoTime(); + + DefaultDependencyNode node; + if ( root != null ) + { + List<? extends Version> versions; + VersionRangeResult rangeResult; + try + { + VersionRangeRequest rangeRequest = + new VersionRangeRequest( root.getArtifact(), request.getRepositories(), + request.getRequestContext() ); + rangeRequest.setTrace( trace ); + rangeResult = versionRangeResolver.resolveVersionRange( session, rangeRequest ); + versions = filterVersions( root, rangeResult, verFilter, new DefaultVersionFilterContext( session ) ); + } + catch ( VersionRangeResolutionException e ) + { + result.addException( e ); + throw new DependencyCollectionException( result, e.getMessage() ); + } + + Version version = versions.get( versions.size() - 1 ); + root = root.setArtifact( root.getArtifact().setVersion( version.toString() ) ); + + ArtifactDescriptorResult descriptorResult; + try + { + ArtifactDescriptorRequest descriptorRequest = new ArtifactDescriptorRequest(); + descriptorRequest.setArtifact( root.getArtifact() ); + descriptorRequest.setRepositories( request.getRepositories() ); + descriptorRequest.setRequestContext( request.getRequestContext() ); + descriptorRequest.setTrace( trace ); + if ( isLackingDescriptor( root.getArtifact() ) ) + { + descriptorResult = new ArtifactDescriptorResult( descriptorRequest ); + } + else + { + descriptorResult = descriptorReader.readArtifactDescriptor( session, descriptorRequest ); + } + } + catch ( ArtifactDescriptorException e ) + { + result.addException( e ); + throw new DependencyCollectionException( result, e.getMessage() ); + } + + root = root.setArtifact( descriptorResult.getArtifact() ); + + if ( !session.isIgnoreArtifactDescriptorRepositories() ) + { + repositories = remoteRepositoryManager.aggregateRepositories( session, repositories, + descriptorResult.getRepositories(), + true ); + } + dependencies = mergeDeps( dependencies, descriptorResult.getDependencies() ); + managedDependencies = mergeDeps( managedDependencies, descriptorResult.getManagedDependencies() ); + + node = new DefaultDependencyNode( root ); + node.setRequestContext( request.getRequestContext() ); + node.setRelocations( descriptorResult.getRelocations() ); + node.setVersionConstraint( rangeResult.getVersionConstraint() ); + node.setVersion( version ); + node.setAliases( descriptorResult.getAliases() ); + node.setRepositories( request.getRepositories() ); + } + else + { + node = new DefaultDependencyNode( request.getRootArtifact() ); + node.setRequestContext( request.getRequestContext() ); + node.setRepositories( request.getRepositories() ); + } + + result.setRoot( node ); + + boolean traverse = root == null || depTraverser == null || depTraverser.traverseDependency( root ); + String errorPath = null; + if ( traverse && !dependencies.isEmpty() ) + { + DataPool pool = new DataPool( session ); + + DefaultDependencyCollectionContext context = + new DefaultDependencyCollectionContext( session, request.getRootArtifact(), root, managedDependencies ); + + DefaultVersionFilterContext versionContext = new DefaultVersionFilterContext( session ); + + Args args = + new Args( session, trace, pool, context, versionContext, request, + useSkip ? DependencyResolutionSkipper.defaultSkipper() + : DependencyResolutionSkipper.neverSkipper() ); + Results results = new Results( result, session ); + + DependencySelector rootDepSelector = + depSelector != null ? depSelector.deriveChildSelector( context ) : null; + DependencyManager rootDepManager = depManager != null ? depManager.deriveChildManager( context ) : null; + DependencyTraverser rootDepTraverser = + depTraverser != null ? depTraverser.deriveChildTraverser( context ) : null; + VersionFilter rootVerFilter = verFilter != null ? verFilter.deriveChildFilter( context ) : null; + + List<DependencyNode> parents = Collections.singletonList( node ); + for ( Dependency dependency : dependencies ) + { + args.dependencyProcessingQueue.add( + new DependencyProcessingContext( rootDepSelector, rootDepManager, rootDepTraverser, + rootVerFilter, repositories, managedDependencies, parents, + dependency ) ); + } + + while ( !args.dependencyProcessingQueue.isEmpty() ) + { + processDependency( args, results, args.dependencyProcessingQueue.remove(), Collections.emptyList(), + false ); + } + + args.skipper.report(); + errorPath = results.errorPath; + } + + long time2 = System.nanoTime(); + + DependencyGraphTransformer transformer = session.getDependencyGraphTransformer(); + if ( transformer != null ) + { + try + { + DefaultDependencyGraphTransformationContext context = + new DefaultDependencyGraphTransformationContext( session ); + context.put( TransformationContextKeys.STATS, stats ); + result.setRoot( transformer.transformGraph( node, context ) ); + } + catch ( RepositoryException e ) + { + result.addException( e ); + } + } + + long time3 = System.nanoTime(); + stats.put( "DefaultDependencyCollector.collectTime", time2 - time1 ); + stats.put( "DefaultDependencyCollector.transformTime", time3 - time2 ); + logger.debug( "Dependency collection stats {}", stats ); Review Comment: Do you we really need a map here and the object creation? The ouput also lacks a unit which makes it hard to read. Maybe: ``` logger.debug( "Dependency collection stats: collect time: {} ms, transform time {} ms", toMS(time2 - time1), toMS(time3 - time2)); ``` ########## maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/collect/df/DfDependencyCollector.java: ########## @@ -0,0 +1,866 @@ +package org.eclipse.aether.internal.impl.collect.df; + +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +import java.util.ArrayList; +import java.util.Collection; +import java.util.Collections; +import java.util.HashMap; +import java.util.HashSet; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Map; +import static java.util.Objects.requireNonNull; + +import javax.inject.Inject; +import javax.inject.Named; +import javax.inject.Singleton; + +import org.eclipse.aether.DefaultRepositorySystemSession; +import org.eclipse.aether.RepositoryException; +import org.eclipse.aether.RepositorySystemSession; +import org.eclipse.aether.RequestTrace; +import org.eclipse.aether.artifact.Artifact; +import org.eclipse.aether.artifact.ArtifactProperties; +import org.eclipse.aether.collection.CollectRequest; +import org.eclipse.aether.collection.CollectResult; +import org.eclipse.aether.collection.DependencyCollectionException; +import org.eclipse.aether.collection.DependencyGraphTransformer; +import org.eclipse.aether.collection.DependencyManagement; +import org.eclipse.aether.collection.DependencyManager; +import org.eclipse.aether.collection.DependencySelector; +import org.eclipse.aether.collection.DependencyTraverser; +import org.eclipse.aether.collection.VersionFilter; +import org.eclipse.aether.graph.DefaultDependencyNode; +import org.eclipse.aether.graph.Dependency; +import org.eclipse.aether.graph.DependencyNode; +import org.eclipse.aether.graph.Exclusion; +import org.eclipse.aether.impl.ArtifactDescriptorReader; +import org.eclipse.aether.impl.RemoteRepositoryManager; +import org.eclipse.aether.impl.VersionRangeResolver; +import org.eclipse.aether.internal.impl.collect.CachingArtifactTypeRegistry; +import org.eclipse.aether.internal.impl.collect.DataPool; +import org.eclipse.aether.internal.impl.collect.DefaultDependencyCollectionContext; +import org.eclipse.aether.internal.impl.collect.DefaultDependencyCycle; +import org.eclipse.aether.internal.impl.collect.DefaultDependencyGraphTransformationContext; +import org.eclipse.aether.internal.impl.collect.DefaultVersionFilterContext; +import org.eclipse.aether.internal.impl.collect.DependencyCollectorDelegate; +import org.eclipse.aether.repository.ArtifactRepository; +import org.eclipse.aether.repository.RemoteRepository; +import org.eclipse.aether.resolution.ArtifactDescriptorException; +import org.eclipse.aether.resolution.ArtifactDescriptorRequest; +import org.eclipse.aether.resolution.ArtifactDescriptorResult; +import org.eclipse.aether.resolution.VersionRangeRequest; +import org.eclipse.aether.resolution.VersionRangeResolutionException; +import org.eclipse.aether.resolution.VersionRangeResult; +import org.eclipse.aether.spi.locator.Service; +import org.eclipse.aether.util.ConfigUtils; +import org.eclipse.aether.util.graph.manager.DependencyManagerUtils; +import org.eclipse.aether.util.graph.transformer.TransformationContextKeys; +import org.eclipse.aether.version.Version; + +/** + * Depth-first {@link org.eclipse.aether.impl.DependencyCollector} (the "original" default). Originally + * this class was located a package higher (as "default" implementation). + * + * @since 1.8.0 + */ +@Singleton +@Named( DfDependencyCollector.NAME ) +public class DfDependencyCollector + extends DependencyCollectorDelegate implements Service +{ + public static final String NAME = "df"; + + public DfDependencyCollector() + { + // enables default constructor + } + + @Inject + DfDependencyCollector( RemoteRepositoryManager remoteRepositoryManager, + ArtifactDescriptorReader artifactDescriptorReader, + VersionRangeResolver versionRangeResolver ) + { + super( remoteRepositoryManager, artifactDescriptorReader, versionRangeResolver ); + } + + @SuppressWarnings( "checkstyle:methodlength" ) + public CollectResult collectDependencies( RepositorySystemSession session, CollectRequest request ) + throws DependencyCollectionException + { + requireNonNull( session, "session cannot be null" ); + requireNonNull( request, "request cannot be null" ); + session = optimizeSession( session ); + + RequestTrace trace = RequestTrace.newChild( request.getTrace(), request ); + + CollectResult result = new CollectResult( request ); + + DependencySelector depSelector = session.getDependencySelector(); + DependencyManager depManager = session.getDependencyManager(); + DependencyTraverser depTraverser = session.getDependencyTraverser(); + VersionFilter verFilter = session.getVersionFilter(); + + Dependency root = request.getRoot(); + List<RemoteRepository> repositories = request.getRepositories(); + List<Dependency> dependencies = request.getDependencies(); + List<Dependency> managedDependencies = request.getManagedDependencies(); + + Map<String, Object> stats = new LinkedHashMap<>(); + long time1 = System.nanoTime(); + + DefaultDependencyNode node; + if ( root != null ) + { + List<? extends Version> versions; + VersionRangeResult rangeResult; + try + { + VersionRangeRequest rangeRequest = + new VersionRangeRequest( root.getArtifact(), request.getRepositories(), + request.getRequestContext() ); + rangeRequest.setTrace( trace ); + rangeResult = versionRangeResolver.resolveVersionRange( session, rangeRequest ); + versions = filterVersions( root, rangeResult, verFilter, new DefaultVersionFilterContext( session ) ); + } + catch ( VersionRangeResolutionException e ) + { + result.addException( e ); + throw new DependencyCollectionException( result, e.getMessage() ); + } + + Version version = versions.get( versions.size() - 1 ); + root = root.setArtifact( root.getArtifact().setVersion( version.toString() ) ); + + ArtifactDescriptorResult descriptorResult; + try + { + ArtifactDescriptorRequest descriptorRequest = new ArtifactDescriptorRequest(); + descriptorRequest.setArtifact( root.getArtifact() ); + descriptorRequest.setRepositories( request.getRepositories() ); + descriptorRequest.setRequestContext( request.getRequestContext() ); + descriptorRequest.setTrace( trace ); + if ( isLackingDescriptor( root.getArtifact() ) ) + { + descriptorResult = new ArtifactDescriptorResult( descriptorRequest ); + } + else + { + descriptorResult = descriptorReader.readArtifactDescriptor( session, descriptorRequest ); + } + } + catch ( ArtifactDescriptorException e ) + { + result.addException( e ); + throw new DependencyCollectionException( result, e.getMessage() ); + } + + root = root.setArtifact( descriptorResult.getArtifact() ); + + if ( !session.isIgnoreArtifactDescriptorRepositories() ) + { + repositories = remoteRepositoryManager.aggregateRepositories( session, repositories, + descriptorResult.getRepositories(), + true ); + } + dependencies = mergeDeps( dependencies, descriptorResult.getDependencies() ); + managedDependencies = mergeDeps( managedDependencies, descriptorResult.getManagedDependencies() ); + + node = new DefaultDependencyNode( root ); + node.setRequestContext( request.getRequestContext() ); + node.setRelocations( descriptorResult.getRelocations() ); + node.setVersionConstraint( rangeResult.getVersionConstraint() ); + node.setVersion( version ); + node.setAliases( descriptorResult.getAliases() ); + node.setRepositories( request.getRepositories() ); + } + else + { + node = new DefaultDependencyNode( request.getRootArtifact() ); + node.setRequestContext( request.getRequestContext() ); + node.setRepositories( request.getRepositories() ); + } + + result.setRoot( node ); + + boolean traverse = root == null || depTraverser == null || depTraverser.traverseDependency( root ); + String errorPath = null; + if ( traverse && !dependencies.isEmpty() ) + { + DataPool pool = new DataPool( session ); + + NodeStack nodes = new NodeStack(); + nodes.push( node ); + + DefaultDependencyCollectionContext context = + new DefaultDependencyCollectionContext( session, request.getRootArtifact(), root, managedDependencies ); + + DefaultVersionFilterContext versionContext = new DefaultVersionFilterContext( session ); + + Args args = new Args( session, trace, pool, nodes, context, versionContext, request ); + Results results = new Results( result, session ); + + process( args, results, dependencies, repositories, + depSelector != null ? depSelector.deriveChildSelector( context ) : null, + depManager != null ? depManager.deriveChildManager( context ) : null, + depTraverser != null ? depTraverser.deriveChildTraverser( context ) : null, + verFilter != null ? verFilter.deriveChildFilter( context ) : null ); + + errorPath = results.errorPath; + } + + long time2 = System.nanoTime(); + + DependencyGraphTransformer transformer = session.getDependencyGraphTransformer(); + if ( transformer != null ) + { + try + { + DefaultDependencyGraphTransformationContext context = + new DefaultDependencyGraphTransformationContext( session ); + context.put( TransformationContextKeys.STATS, stats ); + result.setRoot( transformer.transformGraph( node, context ) ); + } + catch ( RepositoryException e ) + { + result.addException( e ); + } + } + + long time3 = System.nanoTime(); + stats.put( "DefaultDependencyCollector.collectTime", time2 - time1 ); + stats.put( "DefaultDependencyCollector.transformTime", time3 - time2 ); + logger.debug( "Dependency collection stats {}", stats ); + + if ( errorPath != null ) + { + throw new DependencyCollectionException( result, "Failed to collect dependencies at " + errorPath ); + } + if ( !result.getExceptions().isEmpty() ) + { + throw new DependencyCollectionException( result ); + } + + return result; + } + + private static RepositorySystemSession optimizeSession( RepositorySystemSession session ) + { + DefaultRepositorySystemSession optimized = new DefaultRepositorySystemSession( session ); + optimized.setArtifactTypeRegistry( CachingArtifactTypeRegistry.newInstance( session ) ); + return optimized; + } + + private List<Dependency> mergeDeps( List<Dependency> dominant, List<Dependency> recessive ) + { + List<Dependency> result; + if ( dominant == null || dominant.isEmpty() ) + { + result = recessive; + } + else if ( recessive == null || recessive.isEmpty() ) + { + result = dominant; + } + else + { + int initialCapacity = dominant.size() + recessive.size(); + result = new ArrayList<>( initialCapacity ); + Collection<String> ids = new HashSet<>( initialCapacity, 1.0f ); + for ( Dependency dependency : dominant ) + { + ids.add( getId( dependency.getArtifact() ) ); + result.add( dependency ); + } + for ( Dependency dependency : recessive ) + { + if ( !ids.contains( getId( dependency.getArtifact() ) ) ) + { + result.add( dependency ); + } + } + } + return result; + } + + private static String getId( Artifact a ) + { + return a.getGroupId() + ':' + a.getArtifactId() + ':' + a.getClassifier() + ':' + a.getExtension(); + } + + @SuppressWarnings( "checkstyle:parameternumber" ) + private void process( final Args args, Results results, List<Dependency> dependencies, + List<RemoteRepository> repositories, DependencySelector depSelector, + DependencyManager depManager, DependencyTraverser depTraverser, VersionFilter verFilter ) + { + for ( Dependency dependency : dependencies ) + { + processDependency( args, results, repositories, depSelector, depManager, depTraverser, verFilter, + dependency ); + } + } + + @SuppressWarnings( "checkstyle:parameternumber" ) + private void processDependency( Args args, Results results, List<RemoteRepository> repositories, + DependencySelector depSelector, DependencyManager depManager, + DependencyTraverser depTraverser, VersionFilter verFilter, Dependency dependency ) + { + + List<Artifact> relocations = Collections.emptyList(); + processDependency( args, results, repositories, depSelector, depManager, depTraverser, verFilter, dependency, + relocations, false ); + } + + @SuppressWarnings( "checkstyle:parameternumber" ) + private void processDependency( Args args, Results results, List<RemoteRepository> repositories, + DependencySelector depSelector, DependencyManager depManager, + DependencyTraverser depTraverser, VersionFilter verFilter, Dependency dependency, + List<Artifact> relocations, boolean disableVersionManagement ) + { + + if ( depSelector != null && !depSelector.selectDependency( dependency ) ) + { + return; + } + + PremanagedDependency preManaged = + PremanagedDependency.create( depManager, dependency, disableVersionManagement, args.premanagedState ); + dependency = preManaged.managedDependency; + + boolean noDescriptor = isLackingDescriptor( dependency.getArtifact() ); + + boolean traverse = !noDescriptor && ( depTraverser == null || depTraverser.traverseDependency( dependency ) ); + + List<? extends Version> versions; + VersionRangeResult rangeResult; + try + { + VersionRangeRequest rangeRequest = createVersionRangeRequest( args, repositories, dependency ); + + rangeResult = cachedResolveRangeResult( rangeRequest, args.pool, args.session ); + + versions = filterVersions( dependency, rangeResult, verFilter, args.versionContext ); + } + catch ( VersionRangeResolutionException e ) + { + results.addException( dependency, e, args.nodes ); + return; + } + + for ( Version version : versions ) + { + Artifact originalArtifact = dependency.getArtifact().setVersion( version.toString() ); + Dependency d = dependency.setArtifact( originalArtifact ); + + ArtifactDescriptorRequest descriptorRequest = createArtifactDescriptorRequest( args, repositories, d ); + + final ArtifactDescriptorResult descriptorResult = + getArtifactDescriptorResult( args, results, noDescriptor, d, descriptorRequest ); + if ( descriptorResult != null ) + { + d = d.setArtifact( descriptorResult.getArtifact() ); + + DependencyNode node = args.nodes.top(); + + int cycleEntry = DefaultDependencyCycle.find( args.nodes.nodes, d.getArtifact() ); + if ( cycleEntry >= 0 ) + { + results.addCycle( args.nodes, cycleEntry, d ); + DependencyNode cycleNode = args.nodes.get( cycleEntry ); + if ( cycleNode.getDependency() != null ) + { + DefaultDependencyNode child = + createDependencyNode( relocations, preManaged, rangeResult, version, d, descriptorResult, + cycleNode ); + node.getChildren().add( child ); + continue; + } + } + + if ( !descriptorResult.getRelocations().isEmpty() ) + { + boolean disableVersionManagementSubsequently = + originalArtifact.getGroupId().equals( d.getArtifact().getGroupId() ) + && originalArtifact.getArtifactId().equals( d.getArtifact().getArtifactId() ); + + processDependency( args, results, repositories, depSelector, depManager, depTraverser, verFilter, d, + descriptorResult.getRelocations(), disableVersionManagementSubsequently ); + return; + } + else + { + d = args.pool.intern( d.setArtifact( args.pool.intern( d.getArtifact() ) ) ); + + List<RemoteRepository> repos = + getRemoteRepositories( rangeResult.getRepository( version ), repositories ); + + DefaultDependencyNode child = + createDependencyNode( relocations, preManaged, rangeResult, version, d, + descriptorResult.getAliases(), repos, args.request.getRequestContext() ); + + node.getChildren().add( child ); + + boolean recurse = traverse && !descriptorResult.getDependencies().isEmpty(); + if ( recurse ) + { + doRecurse( args, results, repositories, depSelector, depManager, depTraverser, verFilter, d, + descriptorResult, child ); + } + } + } + else + { + DependencyNode node = args.nodes.top(); + List<RemoteRepository> repos = + getRemoteRepositories( rangeResult.getRepository( version ), repositories ); + DefaultDependencyNode child = + createDependencyNode( relocations, preManaged, rangeResult, version, d, null, repos, + args.request.getRequestContext() ); + node.getChildren().add( child ); + } + } + } + + @SuppressWarnings( "checkstyle:parameternumber" ) + private void doRecurse( Args args, Results results, List<RemoteRepository> repositories, + DependencySelector depSelector, DependencyManager depManager, + DependencyTraverser depTraverser, VersionFilter verFilter, Dependency d, + ArtifactDescriptorResult descriptorResult, DefaultDependencyNode child ) + { + DefaultDependencyCollectionContext context = args.collectionContext; + context.set( d, descriptorResult.getManagedDependencies() ); + + DependencySelector childSelector = depSelector != null ? depSelector.deriveChildSelector( context ) : null; + DependencyManager childManager = depManager != null ? depManager.deriveChildManager( context ) : null; + DependencyTraverser childTraverser = depTraverser != null ? depTraverser.deriveChildTraverser( context ) : null; + VersionFilter childFilter = verFilter != null ? verFilter.deriveChildFilter( context ) : null; + + final List<RemoteRepository> childRepos = + args.ignoreRepos + ? repositories + : remoteRepositoryManager.aggregateRepositories( args.session, repositories, + descriptorResult.getRepositories(), true ); + + Object key = + args.pool.toKey( d.getArtifact(), childRepos, childSelector, childManager, childTraverser, childFilter ); + + List<DependencyNode> children = args.pool.getChildren( key ); + if ( children == null ) + { + args.pool.putChildren( key, child.getChildren() ); + + args.nodes.push( child ); + + process( args, results, descriptorResult.getDependencies(), childRepos, childSelector, childManager, + childTraverser, childFilter ); + + args.nodes.pop(); + } + else + { + child.setChildren( children ); + } + } + + private ArtifactDescriptorResult getArtifactDescriptorResult( Args args, Results results, boolean noDescriptor, + Dependency d, + ArtifactDescriptorRequest descriptorRequest ) + { + return noDescriptor + ? new ArtifactDescriptorResult( descriptorRequest ) + : resolveCachedArtifactDescriptor( args.pool, descriptorRequest, args.session, d, results, args ); + + } + + private ArtifactDescriptorResult resolveCachedArtifactDescriptor( DataPool pool, + ArtifactDescriptorRequest descriptorRequest, + RepositorySystemSession session, Dependency d, + Results results, Args args ) + { + Object key = pool.toKey( descriptorRequest ); + ArtifactDescriptorResult descriptorResult = pool.getDescriptor( key, descriptorRequest ); + if ( descriptorResult == null ) + { + try + { + descriptorResult = descriptorReader.readArtifactDescriptor( session, descriptorRequest ); + pool.putDescriptor( key, descriptorResult ); + } + catch ( ArtifactDescriptorException e ) + { + results.addException( d, e, args.nodes ); + pool.putDescriptor( key, e ); + return null; + } + + } + else if ( descriptorResult == DataPool.NO_DESCRIPTOR ) + { + return null; + } + + return descriptorResult; + } + + @SuppressWarnings( "checkstyle:parameternumber" ) + private static DefaultDependencyNode createDependencyNode( List<Artifact> relocations, + PremanagedDependency preManaged, + VersionRangeResult rangeResult, Version version, + Dependency d, Collection<Artifact> aliases, + List<RemoteRepository> repos, String requestContext ) + { + DefaultDependencyNode child = new DefaultDependencyNode( d ); + preManaged.applyTo( child ); + child.setRelocations( relocations ); + child.setVersionConstraint( rangeResult.getVersionConstraint() ); + child.setVersion( version ); + child.setAliases( aliases ); + child.setRepositories( repos ); + child.setRequestContext( requestContext ); + return child; + } + + private static DefaultDependencyNode createDependencyNode( List<Artifact> relocations, + PremanagedDependency preManaged, + VersionRangeResult rangeResult, Version version, + Dependency d, ArtifactDescriptorResult descriptorResult, + DependencyNode cycleNode ) + { + DefaultDependencyNode child = + createDependencyNode( relocations, preManaged, rangeResult, version, d, descriptorResult.getAliases(), + cycleNode.getRepositories(), cycleNode.getRequestContext() ); + child.setChildren( cycleNode.getChildren() ); + return child; + } + + private static ArtifactDescriptorRequest createArtifactDescriptorRequest( Args args, + List<RemoteRepository> repositories, + Dependency d ) + { + ArtifactDescriptorRequest descriptorRequest = new ArtifactDescriptorRequest(); + descriptorRequest.setArtifact( d.getArtifact() ); + descriptorRequest.setRepositories( repositories ); + descriptorRequest.setRequestContext( args.request.getRequestContext() ); + descriptorRequest.setTrace( args.trace ); + return descriptorRequest; + } + + private static VersionRangeRequest createVersionRangeRequest( Args args, List<RemoteRepository> repositories, + Dependency dependency ) + { + VersionRangeRequest rangeRequest = new VersionRangeRequest(); + rangeRequest.setArtifact( dependency.getArtifact() ); + rangeRequest.setRepositories( repositories ); + rangeRequest.setRequestContext( args.request.getRequestContext() ); + rangeRequest.setTrace( args.trace ); + return rangeRequest; + } + + private VersionRangeResult cachedResolveRangeResult( VersionRangeRequest rangeRequest, DataPool pool, + RepositorySystemSession session ) + throws VersionRangeResolutionException + { + Object key = pool.toKey( rangeRequest ); + VersionRangeResult rangeResult = pool.getConstraint( key, rangeRequest ); + if ( rangeResult == null ) + { + rangeResult = versionRangeResolver.resolveVersionRange( session, rangeRequest ); + pool.putConstraint( key, rangeResult ); + } + return rangeResult; + } + + private static boolean isLackingDescriptor( Artifact artifact ) + { + return artifact.getProperty( ArtifactProperties.LOCAL_PATH, null ) != null; + } + + private static List<RemoteRepository> getRemoteRepositories( ArtifactRepository repository, + List<RemoteRepository> repositories ) + { + if ( repository instanceof RemoteRepository ) + { + return Collections.singletonList( (RemoteRepository) repository ); + } + if ( repository != null ) + { + return Collections.emptyList(); + } + return repositories; + } + + private static List<? extends Version> filterVersions( Dependency dependency, VersionRangeResult rangeResult, + VersionFilter verFilter, + DefaultVersionFilterContext verContext ) + throws VersionRangeResolutionException + { + if ( rangeResult.getVersions().isEmpty() ) + { + throw new VersionRangeResolutionException( rangeResult, + "No versions available for " + dependency.getArtifact() + + " within specified range" ); + } + + List<? extends Version> versions; + if ( verFilter != null && rangeResult.getVersionConstraint().getRange() != null ) + { + verContext.set( dependency, rangeResult ); + try + { + verFilter.filterVersions( verContext ); + } + catch ( RepositoryException e ) + { + throw new VersionRangeResolutionException( rangeResult, + "Failed to filter versions for " + dependency.getArtifact() + + ": " + e.getMessage(), e ); Review Comment: Same here. -- This is an automated message from the Apache Git Service. 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