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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.DefaultRepositorySystemSession;
24  import org.eclipse.aether.RepositorySystem;
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  import org.eclipse.aether.util.listener.ChainedRepositoryListener;
33  
34  /**
35   * Example of building reverse dependency tree using custom {@link ReverseTreeRepositoryListener}.
36   */
37  public class ReverseDependencyTree {
38  
39      /**
40       * Main.
41       * @param args
42       * @throws Exception
43       */
44      public static void main(String[] args) throws Exception {
45          System.out.println("------------------------------------------------------------");
46          System.out.println(ReverseDependencyTree.class.getSimpleName());
47  
48          RepositorySystem system = Booter.newRepositorySystem(Booter.selectFactory(args));
49  
50          DefaultRepositorySystemSession session = Booter.newRepositorySystemSession(system);
51  
52          // install the listener into session
53          session.setRepositoryListener(
54                  new ChainedRepositoryListener(session.getRepositoryListener(), new ReverseTreeRepositoryListener()));
55  
56          session.setConfigProperty(ConflictResolver.CONFIG_PROP_VERBOSE, true);
57          session.setConfigProperty(DependencyManagerUtils.CONFIG_PROP_VERBOSE, true);
58  
59          Artifact artifact = new DefaultArtifact("org.apache.maven:maven-resolver-provider:3.6.1");
60  
61          ArtifactDescriptorRequest descriptorRequest = new ArtifactDescriptorRequest();
62          descriptorRequest.setArtifact(artifact);
63          descriptorRequest.setRepositories(Booter.newRepositories(system, session));
64          ArtifactDescriptorResult descriptorResult = system.readArtifactDescriptor(session, descriptorRequest);
65  
66          CollectRequest collectRequest = new CollectRequest();
67          collectRequest.setRequestContext("demo");
68          collectRequest.setRootArtifact(descriptorResult.getArtifact());
69          collectRequest.setDependencies(descriptorResult.getDependencies());
70          collectRequest.setManagedDependencies(descriptorResult.getManagedDependencies());
71          collectRequest.setRepositories(descriptorRequest.getRepositories());
72  
73          system.collectDependencies(session, collectRequest);
74  
75          // in this demo we are not interested in collect result,
76          // as all the "demo work" is done by installed ReverseTreeRepositoryListener
77      }
78  }