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.comm.messages; 20 21 import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration; 22 import org.apache.giraph.conf.MessageClasses; 23 import org.apache.hadoop.io.Writable; 24 import org.apache.hadoop.io.WritableComparable; 25 26 /** 27 * Factory for message stores 28 * 29 * @param <I> Vertex id 30 * @param <M> Message data 31 * @param <MS> Message store 32 */ 33 public interface MessageStoreFactory<I extends WritableComparable, 34 M extends Writable, MS> { 35 /** 36 * Creates new message store. 37 * 38 * @param messageClasses Message classes information to be held in the store 39 * @return New message store 40 */ 41 MS newStore(MessageClasses<I, M> messageClasses); 42 43 /** 44 * Implementation class should use this method of initialization 45 * of any required internal state. 46 * 47 * @param partitionInfo Partition split info 48 * @param conf Configuration 49 */ 50 void initialize(PartitionSplitInfo<I> partitionInfo, 51 ImmutableClassesGiraphConfiguration<I, ?, ?> conf); 52 }