| /** |
| * 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.mongodb.bolt; |
| |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.commons.lang.Validate; |
| import org.apache.storm.mongodb.common.mapper.MongoMapper; |
| import org.apache.storm.task.OutputCollector; |
| import org.apache.storm.task.TopologyContext; |
| import org.apache.storm.topology.OutputFieldsDeclarer; |
| import org.apache.storm.tuple.Tuple; |
| import org.apache.storm.utils.BatchHelper; |
| import org.apache.storm.utils.TupleUtils; |
| import org.bson.Document; |
| |
| /** |
| * Basic bolt for writing to MongoDB. |
| * Note: Each MongoInsertBolt defined in a topology is tied to a specific collection. |
| */ |
| public class MongoInsertBolt extends AbstractMongoBolt { |
| |
| private static final int DEFAULT_FLUSH_INTERVAL_SECS = 1; |
| |
| private MongoMapper mapper; |
| |
| private boolean ordered = true; //default is ordered. |
| |
| private int batchSize; |
| |
| private BatchHelper batchHelper; |
| |
| private int flushIntervalSecs = DEFAULT_FLUSH_INTERVAL_SECS; |
| |
| /** |
| * MongoInsertBolt Constructor. |
| * @param url The MongoDB server url |
| * @param collectionName The collection where reading/writing data |
| * @param mapper MongoMapper converting tuple to an MongoDB document |
| */ |
| public MongoInsertBolt(String url, String collectionName, MongoMapper mapper) { |
| super(url, collectionName); |
| |
| Validate.notNull(mapper, "MongoMapper can not be null"); |
| |
| this.mapper = mapper; |
| } |
| |
| @Override |
| public void execute(Tuple tuple) { |
| try { |
| if (batchHelper.shouldHandle(tuple)) { |
| batchHelper.addBatch(tuple); |
| } |
| |
| if (batchHelper.shouldFlush()) { |
| flushTuples(); |
| batchHelper.ack(); |
| } |
| } catch (Exception e) { |
| batchHelper.fail(e); |
| } |
| } |
| |
| private void flushTuples() { |
| List<Document> docs = new LinkedList<>(); |
| for (Tuple t : batchHelper.getBatchTuples()) { |
| Document doc = mapper.toDocument(t); |
| docs.add(doc); |
| } |
| mongoClient.insert(docs, ordered); |
| } |
| |
| public MongoInsertBolt withBatchSize(int batchSize) { |
| this.batchSize = batchSize; |
| return this; |
| } |
| |
| public MongoInsertBolt withOrdered(boolean ordered) { |
| this.ordered = ordered; |
| return this; |
| } |
| |
| public MongoInsertBolt withFlushIntervalSecs(int flushIntervalSecs) { |
| this.flushIntervalSecs = flushIntervalSecs; |
| return this; |
| } |
| |
| @Override |
| public Map<String, Object> getComponentConfiguration() { |
| return TupleUtils.putTickFrequencyIntoComponentConfig(super.getComponentConfiguration(), flushIntervalSecs); |
| } |
| |
| @Override |
| public void prepare(Map<String, Object> topoConf, TopologyContext context, |
| OutputCollector collector) { |
| super.prepare(topoConf, context, collector); |
| this.batchHelper = new BatchHelper(batchSize, collector); |
| } |
| |
| @Override |
| public void declareOutputFields(OutputFieldsDeclarer declarer) { |
| |
| } |
| |
| } |