| /* |
| * 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 org.apache.giraph.conf.DefaultImmutableClassesGiraphConfigurable; |
| import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration; |
| import org.apache.giraph.mapping.MappingStore; |
| import org.apache.giraph.mapping.MappingStoreOps; |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hadoop.io.WritableComparable; |
| import org.apache.log4j.Logger; |
| |
| /** |
| * Stores LocalData for each worker |
| * |
| * @param <I> vertexId type |
| * @param <V> vertex value type |
| * @param <E> edge value type |
| * @param <B> mappingTarget type |
| */ |
| @SuppressWarnings("unchecked") |
| public class LocalData<I extends WritableComparable, V extends Writable, |
| E extends Writable, B extends Writable> |
| extends DefaultImmutableClassesGiraphConfigurable<I, V, E> { |
| /** Logger Instance */ |
| private static final Logger LOG = Logger.getLogger(LocalData.class); |
| /** MappingStore from vertexId - target */ |
| private MappingStore<I, B> mappingStore; |
| /** Do operations using mapping store */ |
| private MappingStoreOps<I, B> mappingStoreOps; |
| /** |
| * Constructor |
| * |
| * Set configuration, create & initialize mapping store |
| * @param conf giraph configuration |
| */ |
| public LocalData(ImmutableClassesGiraphConfiguration<I, V, E> conf) { |
| // set configuration |
| setConf(conf); |
| // check if user set the mapping store => create & initialize it |
| mappingStore = (MappingStore<I, B>) getConf().createMappingStore(); |
| if (mappingStore != null) { |
| mappingStore.initialize(); |
| } |
| mappingStoreOps = (MappingStoreOps<I, B>) getConf().createMappingStoreOps(); |
| if (mappingStoreOps != null) { |
| mappingStoreOps.initialize(mappingStore); |
| } |
| } |
| |
| public MappingStore<I, B> getMappingStore() { |
| return mappingStore; |
| } |
| |
| public MappingStoreOps<I, B> getMappingStoreOps() { |
| return mappingStoreOps; |
| } |
| |
| /** |
| * Remove mapping store from localData |
| * if mapping data is already embedded into vertexIds |
| */ |
| public void removeMappingStoreIfPossible() { |
| if (mappingStoreOps != null && mappingStoreOps.hasEmbedding()) { |
| mappingStore = null; |
| } |
| } |
| |
| /** |
| * Prints Stats of individual data it stores |
| */ |
| public void printStats() { |
| if (LOG.isInfoEnabled()) { |
| LOG.info("MappingStore has : " + mappingStore.getStats() + " entries"); |
| } |
| } |
| } |