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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.maven.resolver.examples;
20  
21  import org.apache.maven.resolver.examples.util.Booter;
22  import org.apache.maven.resolver.examples.util.ReverseTreeRepositoryListener;
23  import org.eclipse.aether.RepositorySystem;
24  import org.eclipse.aether.RepositorySystemSession.CloseableSession;
25  import org.eclipse.aether.artifact.Artifact;
26  import org.eclipse.aether.artifact.DefaultArtifact;
27  import org.eclipse.aether.collection.CollectRequest;
28  import org.eclipse.aether.resolution.ArtifactDescriptorRequest;
29  import org.eclipse.aether.resolution.ArtifactDescriptorResult;
30  import org.eclipse.aether.util.graph.manager.DependencyManagerUtils;
31  import org.eclipse.aether.util.graph.transformer.ConflictResolver;
32  
33  /**
34   * Example of building reverse dependency tree using custom {@link ReverseTreeRepositoryListener}.
35   */
36  public class ReverseDependencyTree {
37  
38      /**
39       * Main.
40       * @param args
41       * @throws Exception
42       */
43      public static void main(String[] args) throws Exception {
44          System.out.println("------------------------------------------------------------");
45          System.out.println(ReverseDependencyTree.class.getSimpleName());
46  
47          try (RepositorySystem system = Booter.newRepositorySystem(Booter.selectFactory(args))) {
48              try (CloseableSession session = Booter.newRepositorySystemSession(system)
49                      .withRepositoryListener(new ReverseTreeRepositoryListener())
50                      .setConfigProperty(ConflictResolver.CONFIG_PROP_VERBOSE, true)
51                      .setConfigProperty(DependencyManagerUtils.CONFIG_PROP_VERBOSE, true)
52                      .build()) {
53                  Artifact artifact = new DefaultArtifact("org.apache.maven:maven-resolver-provider:3.6.1");
54  
55                  ArtifactDescriptorRequest descriptorRequest = new ArtifactDescriptorRequest();
56                  descriptorRequest.setArtifact(artifact);
57                  descriptorRequest.setRepositories(Booter.newRepositories(system, session));
58                  ArtifactDescriptorResult descriptorResult = system.readArtifactDescriptor(session, descriptorRequest);
59  
60                  CollectRequest collectRequest = new CollectRequest();
61                  collectRequest.setRequestContext("demo");
62                  collectRequest.setRootArtifact(descriptorResult.getArtifact());
63                  collectRequest.setDependencies(descriptorResult.getDependencies());
64                  collectRequest.setManagedDependencies(descriptorResult.getManagedDependencies());
65                  collectRequest.setRepositories(descriptorRequest.getRepositories());
66  
67                  system.collectDependencies(session, collectRequest);
68  
69                  // in this demo we are not interested in collect result,
70                  // as all the "demo work" is done by installed ReverseTreeRepositoryListener
71              }
72          }
73      }
74  }