| /** |
| * 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 backtype.storm.coordination; |
| |
| import backtype.storm.coordination.CoordinatedBolt.FinishedCallback; |
| import backtype.storm.coordination.CoordinatedBolt.TimeoutCallback; |
| import backtype.storm.task.OutputCollector; |
| import backtype.storm.task.TopologyContext; |
| import backtype.storm.topology.FailedException; |
| import backtype.storm.topology.IRichBolt; |
| import backtype.storm.topology.OutputFieldsDeclarer; |
| import backtype.storm.tuple.Tuple; |
| import backtype.storm.utils.Utils; |
| import java.util.HashMap; |
| import java.util.Map; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class BatchBoltExecutor implements IRichBolt, FinishedCallback, TimeoutCallback { |
| public static Logger LOG = LoggerFactory.getLogger(BatchBoltExecutor.class); |
| |
| byte[] _boltSer; |
| Map<Object, IBatchBolt> _openTransactions; |
| Map _conf; |
| TopologyContext _context; |
| BatchOutputCollectorImpl _collector; |
| |
| public BatchBoltExecutor(IBatchBolt bolt) { |
| _boltSer = Utils.javaSerialize(bolt); |
| } |
| |
| @Override |
| public void prepare(Map conf, TopologyContext context, OutputCollector collector) { |
| _conf = conf; |
| _context = context; |
| _collector = new BatchOutputCollectorImpl(collector); |
| _openTransactions = new HashMap<Object, IBatchBolt>(); |
| } |
| |
| @Override |
| public void execute(Tuple input) { |
| Object id = input.getValue(0); |
| IBatchBolt bolt = getBatchBolt(id); |
| try { |
| bolt.execute(input); |
| _collector.ack(input); |
| } catch(FailedException e) { |
| LOG.error("Failed to process tuple in batch", e); |
| _collector.fail(input); |
| } |
| } |
| |
| @Override |
| public void cleanup() { |
| } |
| |
| @Override |
| public void finishedId(Object id) { |
| IBatchBolt bolt = getBatchBolt(id); |
| _openTransactions.remove(id); |
| bolt.finishBatch(); |
| } |
| |
| @Override |
| public void timeoutId(Object attempt) { |
| _openTransactions.remove(attempt); |
| } |
| |
| |
| @Override |
| public void declareOutputFields(OutputFieldsDeclarer declarer) { |
| newTransactionalBolt().declareOutputFields(declarer); |
| } |
| |
| @Override |
| public Map<String, Object> getComponentConfiguration() { |
| return newTransactionalBolt().getComponentConfiguration(); |
| } |
| |
| private IBatchBolt getBatchBolt(Object id) { |
| IBatchBolt bolt = _openTransactions.get(id); |
| if(bolt==null) { |
| bolt = newTransactionalBolt(); |
| bolt.prepare(_conf, _context, _collector, id); |
| _openTransactions.put(id, bolt); |
| } |
| return bolt; |
| } |
| |
| private IBatchBolt newTransactionalBolt() { |
| return Utils.javaDeserialize(_boltSer, IBatchBolt.class); |
| } |
| } |