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1   package org.apache.maven;
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 org.apache.maven.execution.MavenSession;
23  
24  /**
25   * Allows core extensions to participate in Maven build session lifecycle.
26   *
27   * All callback methods (will) follow beforeXXX/afterXXX naming pattern to
28   * indicate at what lifecycle point it is being called.
29   *
30   * @see <a href="https://maven.apache.org/examples/maven-3-lifecycle-extensions.html">example</a>
31   * @see <a href="https://issues.apache.org/jira/browse/MNG-4224">MNG-4224</a>
32   * @since 3.0-alpha-3
33   */
34  public abstract class AbstractMavenLifecycleParticipant
35  {
36  
37      /**
38       * Invoked after all MavenProject instances have been created.
39       *
40       * This callback is intended to allow extensions to manipulate MavenProjects
41       * before they are sorted and actual build execution starts.
42       */
43      public void afterProjectsRead( MavenSession session )
44          throws MavenExecutionException
45      {
46          // do nothing
47      }
48  
49      /**
50       * Invoked after MavenSession instance has been created.
51       *
52       * This callback is intended to allow extensions to inject execution properties,
53       * activate profiles and perform similar tasks that affect MavenProject
54       * instance construction.
55       */
56      // TODO This is too early for build extensions, so maybe just remove it?
57      public void afterSessionStart( MavenSession session )
58          throws MavenExecutionException
59      {
60          // do nothing
61      }
62  
63      /**
64       * Invoked after all projects were built.
65       *
66       * This callback is intended to allow extensions to perform cleanup of any
67       * allocated external resources after the build. It is invoked on best-effort
68       * basis and may be missed due to an Error or RuntimeException in Maven core
69       * code.
70       * @since 3.2.1, MNG-5389
71       */
72      public void afterSessionEnd( MavenSession session )
73          throws MavenExecutionException
74      {
75          // do nothing
76      }
77  }