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 import org.apache.giraph.metrics.AggregatedMetrics; 23 import org.apache.giraph.partition.PartitionStats; 24 25 import java.util.List; 26 27 /** 28 * A no-op implementation of MasterObserver to make it easier for users. 29 */ 30 public class DefaultMasterObserver implements MasterObserver { 31 /** Configuration to use */ 32 private ImmutableClassesGiraphConfiguration conf; 33 34 @Override 35 public void setConf(ImmutableClassesGiraphConfiguration configuration) { 36 this.conf = configuration; 37 } 38 39 @Override 40 public ImmutableClassesGiraphConfiguration getConf() { 41 return conf; 42 } 43 44 @Override 45 public void preApplication() { } 46 47 @Override 48 public void postApplication() { } 49 50 @Override 51 public void applicationFailed(Exception e) { } 52 53 @Override 54 public void preSuperstep(long superstep) { } 55 56 @Override 57 public void postSuperstep(long superstep) { } 58 59 @Override 60 public void superstepMetricsUpdate(long superstep, 61 AggregatedMetrics aggregatedMetrics, 62 List<PartitionStats> partitionStatsList) { } 63 }