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.combiner; 20 21 import org.apache.hadoop.io.DoubleWritable; 22 import org.apache.hadoop.io.WritableComparable; 23 24 /** 25 * A combiner that sums double-valued messages 26 * 27 * Use SumMessageCombiner.DOUBLE instead. 28 */ 29 @Deprecated() 30 public class DoubleSumMessageCombiner 31 implements MessageCombiner<WritableComparable, DoubleWritable> { 32 @Override 33 public void combine(WritableComparable vertexIndex, 34 DoubleWritable originalMessage, DoubleWritable messageToCombine) { 35 originalMessage.set(originalMessage.get() + messageToCombine.get()); 36 } 37 38 @Override 39 public DoubleWritable createInitialMessage() { 40 return new DoubleWritable(0); 41 } 42 }