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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, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.giraph.utils;
19  
20  import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration;
21  import org.apache.giraph.master.MasterObserver;
22  import org.apache.giraph.worker.WorkerObserver;
23  
24  /**
25   * Logs versions of Giraph dependencies on job start.
26   */
27  public class LogVersions implements WorkerObserver, MasterObserver {
28    @Override
29    public void applicationFailed(Exception e) { }
30  
31    @Override
32    public void setConf(ImmutableClassesGiraphConfiguration configuration) { }
33  
34    @Override
35    public ImmutableClassesGiraphConfiguration getConf() {
36      return null;
37    }
38  
39    @Override
40    public void preLoad() { }
41  
42    @Override
43    public void postSave() { }
44  
45    @Override
46    public void preApplication() {
47      GiraphDepVersions.get().logVersionsUsed();
48    }
49  
50    @Override
51    public void postApplication() { }
52  
53    @Override
54    public void preSuperstep(long superstep) { }
55  
56    @Override
57    public void postSuperstep(long superstep) { }
58  }