| /** |
| * 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.storm.trident.state.map; |
| |
| import java.io.Serializable; |
| import java.util.ArrayList; |
| import java.util.LinkedList; |
| import java.util.List; |
| |
| public class MicroBatchIBackingMap<T> implements IBackingMap<T> { |
| IBackingMap<T> delegate; |
| Options options; |
| |
| |
| public MicroBatchIBackingMap(final Options options, final IBackingMap<T> delegate) { |
| this.options = options; |
| this.delegate = delegate; |
| assert options.maxMultiPutBatchSize >= 0; |
| assert options.maxMultiGetBatchSize >= 0; |
| } |
| |
| @Override |
| public void multiPut(final List<List<Object>> keys, final List<T> values) { |
| int thisBatchSize; |
| if (options.maxMultiPutBatchSize == 0) { |
| thisBatchSize = keys.size(); |
| } else { |
| thisBatchSize = options.maxMultiPutBatchSize; |
| } |
| |
| LinkedList<List<Object>> keysTodo = new LinkedList<List<Object>>(keys); |
| LinkedList<T> valuesTodo = new LinkedList<T>(values); |
| |
| while (!keysTodo.isEmpty()) { |
| List<List<Object>> keysBatch = new ArrayList<List<Object>>(thisBatchSize); |
| List<T> valuesBatch = new ArrayList<T>(thisBatchSize); |
| for (int i = 0; i < thisBatchSize && !keysTodo.isEmpty(); i++) { |
| keysBatch.add(keysTodo.removeFirst()); |
| valuesBatch.add(valuesTodo.removeFirst()); |
| } |
| |
| delegate.multiPut(keysBatch, valuesBatch); |
| } |
| } |
| |
| @Override |
| public List<T> multiGet(final List<List<Object>> keys) { |
| int thisBatchSize; |
| if (options.maxMultiGetBatchSize == 0) { |
| thisBatchSize = keys.size(); |
| } else { |
| thisBatchSize = options.maxMultiGetBatchSize; |
| } |
| |
| LinkedList<List<Object>> keysTodo = new LinkedList<List<Object>>(keys); |
| |
| List<T> ret = new ArrayList<T>(keys.size()); |
| |
| while (!keysTodo.isEmpty()) { |
| List<List<Object>> keysBatch = new ArrayList<List<Object>>(thisBatchSize); |
| for (int i = 0; i < thisBatchSize && !keysTodo.isEmpty(); i++) { |
| keysBatch.add(keysTodo.removeFirst()); |
| } |
| |
| List<T> retSubset = delegate.multiGet(keysBatch); |
| ret.addAll(retSubset); |
| } |
| |
| return ret; |
| } |
| |
| public static class Options implements Serializable { |
| public int maxMultiGetBatchSize = 0; // 0 means delegate batch size = trident batch size. |
| public int maxMultiPutBatchSize = 0; |
| } |
| } |