| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.giraph.worker; |
| |
| import java.io.IOException; |
| |
| import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration; |
| import org.apache.giraph.graph.VertexEdgeCount; |
| import org.apache.giraph.io.GiraphInputFormat; |
| import org.apache.giraph.io.MappingInputFormat; |
| import org.apache.giraph.io.MappingReader; |
| import org.apache.giraph.mapping.MappingEntry; |
| import org.apache.giraph.mapping.MappingStore; |
| import org.apache.giraph.io.InputType; |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hadoop.io.WritableComparable; |
| import org.apache.hadoop.mapreduce.InputSplit; |
| import org.apache.hadoop.mapreduce.Mapper; |
| |
| /** |
| * Load as many mapping input splits as possible. |
| * Every thread will has its own instance of WorkerClientRequestProcessor |
| * to send requests. |
| * |
| * @param <I> vertexId type |
| * @param <V> vertexValue type |
| * @param <E> edgeValue type |
| * @param <B> mappingTarget type |
| */ |
| @SuppressWarnings("unchecked") |
| public class MappingInputSplitsCallable<I extends WritableComparable, |
| V extends Writable, E extends Writable, B extends Writable> |
| extends InputSplitsCallable<I, V, E> { |
| /** User supplied mappingInputFormat */ |
| private final MappingInputFormat<I, V, E, B> mappingInputFormat; |
| /** Link to bspServiceWorker */ |
| private final BspServiceWorker<I, V, E> bspServiceWorker; |
| |
| /** |
| * Constructor |
| * |
| * @param mappingInputFormat mappingInputFormat |
| * @param context Context |
| * @param configuration Configuration |
| * @param bspServiceWorker bsp service worker |
| * @param splitsHandler Splits handler |
| */ |
| public MappingInputSplitsCallable( |
| MappingInputFormat<I, V, E, B> mappingInputFormat, |
| Mapper<?, ?, ?, ?>.Context context, |
| ImmutableClassesGiraphConfiguration<I, V, E> configuration, |
| BspServiceWorker<I, V, E> bspServiceWorker, |
| WorkerInputSplitsHandler splitsHandler) { |
| super(context, configuration, bspServiceWorker, splitsHandler); |
| this.mappingInputFormat = mappingInputFormat; |
| this.bspServiceWorker = bspServiceWorker; |
| } |
| |
| @Override |
| public GiraphInputFormat getInputFormat() { |
| return mappingInputFormat; |
| } |
| |
| @Override |
| public InputType getInputType() { |
| return InputType.MAPPING; |
| } |
| |
| @Override |
| protected VertexEdgeCount readInputSplit(InputSplit inputSplit) |
| throws IOException, InterruptedException { |
| MappingReader<I, V, E, B> mappingReader = |
| mappingInputFormat.createMappingReader(inputSplit, context); |
| mappingReader.setConf(configuration); |
| |
| WorkerThreadGlobalCommUsage globalCommUsage = this.bspServiceWorker |
| .getAggregatorHandler().newThreadAggregatorUsage(); |
| |
| mappingReader.initialize(inputSplit, context); |
| mappingReader.setWorkerGlobalCommUsage(globalCommUsage); |
| |
| int entriesLoaded = 0; |
| MappingStore<I, B> mappingStore = |
| (MappingStore<I, B>) bspServiceWorker.getLocalData().getMappingStore(); |
| |
| while (mappingReader.nextEntry()) { |
| MappingEntry<I, B> entry = mappingReader.getCurrentEntry(); |
| entriesLoaded += 1; |
| mappingStore.addEntry(entry.getVertexId(), entry.getMappingTarget()); |
| } |
| return new VertexEdgeCount(0, 0, entriesLoaded); |
| } |
| } |