| /* |
| * 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.graph.partition; |
| |
| import org.apache.hadoop.conf.Configurable; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hadoop.io.WritableComparable; |
| |
| /** |
| * Divides the vertices into partitions by their hash code using a simple |
| * round-robin hash for great balancing if given a random hash code. |
| * |
| * @param <I> Vertex index value |
| * @param <V> Vertex value |
| * @param <E> Edge value |
| * @param <M> Message value |
| */ |
| @SuppressWarnings("rawtypes") |
| public class HashPartitionerFactory<I extends WritableComparable, |
| V extends Writable, E extends Writable, M extends Writable> |
| implements Configurable, |
| GraphPartitionerFactory<I, V, E, M> { |
| private Configuration conf; |
| |
| @Override |
| public MasterGraphPartitioner<I, V, E, M> createMasterGraphPartitioner() { |
| return new HashMasterPartitioner<I, V, E, M>(getConf()); |
| } |
| |
| @Override |
| public WorkerGraphPartitioner<I, V, E, M> createWorkerGraphPartitioner() { |
| return new HashWorkerPartitioner<I, V, E, M>(); |
| } |
| |
| @Override |
| public Configuration getConf() { |
| return conf; |
| } |
| |
| @Override |
| public void setConf(Configuration conf) { |
| this.conf = conf; |
| } |
| } |