View Javadoc

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  
19  package org.apache.giraph.master;
20  
21  import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration;
22  
23  /**
24   * A no-op implementation of MasterObserver to make it easier for users.
25   */
26  public class DefaultMasterObserver implements MasterObserver {
27    /** Configuration to use */
28    private ImmutableClassesGiraphConfiguration conf;
29  
30    @Override
31    public void setConf(ImmutableClassesGiraphConfiguration configuration) {
32      this.conf = configuration;
33    }
34  
35    @Override
36    public ImmutableClassesGiraphConfiguration getConf() {
37      return conf;
38    }
39  
40    @Override
41    public void preApplication() { }
42  
43    @Override
44    public void postApplication() { }
45  
46    @Override
47    public void applicationFailed(Exception e) { }
48  
49    @Override
50    public void preSuperstep(long superstep) { }
51  
52    @Override
53    public void postSuperstep(long superstep) { }
54  }