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.block_app.framework.piece.global_comm.map; 19 20 import org.apache.giraph.block_app.framework.api.BlockMasterApi; 21 import org.apache.giraph.block_app.framework.piece.global_comm.ReducerHandle; 22 23 /** 24 * Handle to array of reducers 25 * 26 * @param <I> Key type 27 * @param <S> Single value type 28 * @param <R> Reduced value type 29 */ 30 public interface ReducerMapHandle<I, S, R> 31 extends MapHandle<I, ReducerHandle<S, R>> { 32 /** 33 * Number of elements that were reduced. 34 */ 35 int getReducedSize(BlockMasterApi master); 36 37 /** 38 * Broadcast whole map of reducers to master 39 * 40 * @return Handle to the broadcasted map. 41 */ 42 BroadcastMapHandle<I, R> broadcastValue(BlockMasterApi master); 43 }