/** * 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 com.huawei.streaming.storm; import java.util.Map; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.huawei.streaming.application.StreamAdapter; import com.huawei.streaming.config.StreamingConfig; import com.huawei.streaming.event.TupleEvent; import com.huawei.streaming.exception.StreamingException; import com.huawei.streaming.operator.IRichOperator; import com.huawei.streaming.operator.OutputOperator; import backtype.storm.task.OutputCollector; import backtype.storm.task.TopologyContext; import backtype.storm.topology.IRichBolt; import backtype.storm.topology.OutputFieldsDeclarer; import backtype.storm.tuple.Tuple; /** * Storm的输出bolt * */ public class StormOutputBolt implements IRichBolt, StreamAdapter { private static final long serialVersionUID = -5921149658363414958L; private static final Logger LOG = LoggerFactory.getLogger(StormOutputBolt.class); private OutputCollector outputCollector; private OutputOperator output; private boolean needAck = false; /** * {@inheritDoc} */ @Override public void setOperator(IRichOperator operator) { this.output = (OutputOperator)operator; } /** * {@inheritDoc} */ @Override public void prepare(Map stormConf, TopologyContext context, OutputCollector collector) { LOG.debug("Start to prepare storm output bolt."); outputCollector = collector; if (null != output.getConfig().get(StreamingConfig.STREAMING_STORM_COMMON_ISACK)) { needAck = Boolean.valueOf(output.getConfig().get(StreamingConfig.STREAMING_STORM_COMMON_ISACK).toString()); } try { output.initialize(); } catch (StreamingException e) { LOG.error("Failed to initialize output stream."); throw new RuntimeException("Failed to initialize output stream", e); } } /** * {@inheritDoc} */ @Override public void execute(Tuple tuple) { LOG.debug("Start up to execute tuple."); String sourceStreamName = tuple.getSourceStreamId(); try { for (String streamName : output.getInputStream()) { if (sourceStreamName.equals(streamName)) { TupleEvent event = com.huawei.streaming.storm.TupleTransform.tupeToEvent(tuple, output.getInputSchema().get(streamName)); output.execute(streamName, event); } } } catch (StreamingException e) { LOG.error("Failed to execute tuple."); throw new RuntimeException("Failed to execute tuple.", e); } if (needAck) { outputCollector.ack(tuple); } } /** * {@inheritDoc} */ @Override public void cleanup() { LOG.debug("Start to cleanup storm output bolt."); try { output.destroy(); } catch (StreamingException e) { LOG.error("Failed to destroy output."); throw new RuntimeException("Failed to destroy output", e); } } /** * {@inheritDoc} */ @Override public void declareOutputFields(OutputFieldsDeclarer declarer) { } /** * {@inheritDoc} */ @Override public Map<String, Object> getComponentConfiguration() { return output.getConfig(); } }