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 19 package org.apache.giraph.edge; 20 21 import org.apache.giraph.bsp.CentralizedServiceWorker; 22 import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration; 23 import org.apache.hadoop.io.Writable; 24 import org.apache.hadoop.io.WritableComparable; 25 import org.apache.hadoop.util.Progressable; 26 27 /** 28 * Factory to create a new Edge Store 29 * @param <I> vertex id 30 * @param <V> vertex value 31 * @param <E> edge value 32 */ 33 public interface EdgeStoreFactory<I extends WritableComparable, 34 V extends Writable, E extends Writable> { 35 36 /** 37 * Creates new edge store. 38 * 39 * @return edge store 40 */ 41 EdgeStore<I, V, E> newStore(); 42 43 /** 44 * Implementation class should use this method of initialization 45 * of any required internal state. 46 * 47 * @param service Service to get partition mappings 48 * @param conf Configuration 49 * @param progressable Progressable 50 */ 51 void initialize(CentralizedServiceWorker<I, V, E> service, 52 ImmutableClassesGiraphConfiguration<I, V, E> conf, 53 Progressable progressable); 54 }