1/*2 * Licensed to the Apache Software Foundation (ASF) under one3 * or more contributor license agreements. See the NOTICE file4 * distributed with this work for additional information5 * regarding copyright ownership. The ASF licenses this file6 * to you under the Apache License, Version 2.0 (the7 * "License"); you may not use this file except in compliance8 * with the License. You may obtain a copy of the License at9 *10 * http://www.apache.org/licenses/LICENSE-2.011 *12 * Unless required by applicable law or agreed to in writing, software13 * 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 and16 * limitations under the License.17 */1819package org.apache.giraph.comm.messages;
2021import org.apache.giraph.factories.MessageValueFactory;
22import org.apache.giraph.utils.ExtendedDataInput;
23import org.apache.giraph.utils.Factory;
24import org.apache.giraph.utils.RepresentativeByteStructIterable;
25import org.apache.hadoop.io.Writable;
2627/**28 * Special iterable that recycles the message29 *30 * @param <M> Message data31 */32publicclass MessagesIterable<M extends Writable>
33extends RepresentativeByteStructIterable<M> {
34/** Message class */35privatefinal MessageValueFactory<M> messageValueFactory;
3637/**38 * Constructor39 *40 * @param dataInputFactory Factory for data inputs41 * @param messageValueFactory factory for creating message values42 */43publicMessagesIterable(
44 Factory<? extends ExtendedDataInput> dataInputFactory,
45 MessageValueFactory<M> messageValueFactory) {
46super(dataInputFactory);
47this.messageValueFactory = messageValueFactory;
48 }
4950 @Override
51protected M createWritable() {
52return messageValueFactory.newInstance();
53 }
54 }