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.worker; 19 20 import org.apache.hadoop.io.Writable; 21 22 /** 23 * Methods on worker can provide values to reduce through this interface 24 */ 25 public interface WorkerReduceUsage { 26 /** 27 * Reduce given value. 28 * @param name Name of the reducer 29 * @param value Single value to reduce 30 */ 31 void reduce(String name, Object value); 32 33 /** 34 * Reduce given partial value. 35 * @param name Name of the reducer 36 * @param value Single value to reduce 37 */ 38 void reduceMerge(String name, Writable value); 39 }