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; 19 20 import java.util.List; 21 22 import org.apache.giraph.block_app.framework.api.BlockWorkerContextReceiveApi; 23 import org.apache.giraph.block_app.framework.api.BlockWorkerContextSendApi; 24 import org.apache.giraph.types.NoMessage; 25 import org.apache.hadoop.io.Writable; 26 import org.apache.hadoop.io.WritableComparable; 27 28 /** 29 * Piece that should be extended in common usecases, when we want to be: 30 * - sending and then receiving messages from vertices 31 * - sending data to be aggregated from workers to master 32 * - sending values from master, via aggregators, to workers 33 * 34 * (basically - we don't want to use WorkerContext) 35 * 36 * @param <I> Vertex id type 37 * @param <V> Vertex value type 38 * @param <E> Edge value type 39 * @param <M> Message type 40 * @param <S> Execution stage type 41 */ 42 @SuppressWarnings("rawtypes") 43 public class Piece<I extends WritableComparable, V extends Writable, 44 E extends Writable, M extends Writable, S> 45 extends DefaultParentPiece<I, V, E, M, Object, NoMessage, S> { 46 47 // Disallowing use of Worker Context functions: 48 @Override 49 public final void workerContextSend( 50 BlockWorkerContextSendApi<I, NoMessage> workerContextApi, 51 S executionStage, Object workerValue) { 52 } 53 54 @Override 55 public final void workerContextReceive( 56 BlockWorkerContextReceiveApi workerContextApi, 57 S executionStage, Object workerValue, List<NoMessage> workerMessages) { 58 } 59 }