content: /**
   * 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.alipay.dw.jstorm.example.tm;
  
  import java.util.Map;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.alibaba.jstorm.task.master.TopologyMaster;
  import com.alipay.dw.jstorm.example.tm.TMUdfHandler.TMUdfMessage;
  
  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;
  
  public class TMUdfBolt implements IRichBolt {
      private static Logger LOG = LoggerFactory.getLogger(TMUdfBolt.class);
  
      @Override
      public void prepare(Map stormConf, TopologyContext context, OutputCollector collector) {
          
      }
  
      @Override
      public void execute(Tuple input) {
          Object value = input.getValue(0);
          if (input.getSourceStreamId().equals(TopologyMaster.USER_DEFINED_STREAM)) {
              TMUdfMessage message = (TMUdfMessage) value;
              LOG.info("Received TM UDF message trigged by task-{}", message.spoutTaskId);
          } else {
              LOG.info("Received unkown message: {}", input);
          }
      }
  
      @Override
      public void cleanup() {
          
      }
  
      @Override
      public void declareOutputFields(OutputFieldsDeclarer declarer) {
          
      }
  
      @Override
      public Map<String, Object> getComponentConfiguration() {
          return null;
      }
      
  }