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.jstorm.example.unittests.sequence;
  
  import backtype.storm.task.OutputCollector;
  import backtype.storm.task.TopologyContext;
  import backtype.storm.topology.IRichBolt;
  import backtype.storm.topology.OutputFieldsDeclarer;
  import backtype.storm.tuple.Fields;
  import backtype.storm.tuple.Tuple;
  import backtype.storm.tuple.Values;
  import com.alibaba.jstorm.common.metric.AsmCounter;
  import com.alibaba.jstorm.metric.MetricClient;
  import com.alipay.dw.jstorm.example.sequence.SequenceTopologyDef;
  import com.alipay.dw.jstorm.example.sequence.bean.Pair;
  import com.alipay.dw.jstorm.example.sequence.bean.TradeCustomer;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.concurrent.atomic.AtomicLong;
  
  /**
   * @author binyang.dby on 2016/7/8.
   */
  public class SequenceTestMergeRecord implements IRichBolt
  {
      private Map<Long, Tuple> tradeMap    = new HashMap<Long, Tuple>();
      private Map<Long, Tuple> customerMap = new HashMap<Long, Tuple>();
      private AtomicLong tradeSum    = new AtomicLong(0);
      private AtomicLong customerSum = new AtomicLong(0);
      private OutputCollector collector;
      private MetricClient metricClient;
      private AsmCounter emitCounter;
      @Override
      public void prepare(Map stormConf, TopologyContext context, OutputCollector collector) {
          metricClient = new MetricClient(context);
          emitCounter = metricClient.registerCounter(SequenceTestMetricsDef.METRIC_MERGE_EMIT);
          this.collector = collector;
      }
  
      @Override
      public void execute(Tuple input) {
          Long tupleId = input.getLong(0);
          Pair pair = (Pair) input.getValue(1);
  
          Pair trade = null;
          Pair customer = null;
  
          Tuple tradeTuple = null;
          Tuple customerTuple = null;
  
          if (input.getSourceComponent().equals(SequenceTopologyDef.CUSTOMER_BOLT_NAME)) {
              customer = pair;
              customerTuple = input;
  
              tradeTuple = tradeMap.remove(tupleId);
              if (tradeTuple == null) {
                  customerMap.put(tupleId, input);
                  return;
              }
  
              trade = (Pair) tradeTuple.getValue(1);
  
          } else if (input.getSourceComponent().equals(SequenceTopologyDef.TRADE_BOLT_NAME)) {
              trade = pair;
              tradeTuple = input;
  
              customerTuple = customerMap.remove(tupleId);
              if (customerTuple == null) {
                  tradeMap.put(tupleId, input);
                  return;
              }
  
              customer = (Pair) customerTuple.getValue(1);
          } else {
              collector.fail(input);
              return;
          }
  
          tradeSum.addAndGet(trade.getValue());
          customerSum.addAndGet(customer.getValue());
  
          collector.ack(tradeTuple);
          collector.ack(customerTuple);
  
          TradeCustomer tradeCustomer = new TradeCustomer();
          tradeCustomer.setTrade(trade);
          tradeCustomer.setCustomer(customer);
          collector.emit(new Values(tupleId, tradeCustomer));
          emitCounter.inc();
      }
  
      @Override
      public void cleanup() {
  
      }
  
      @Override
      public void declareOutputFields(OutputFieldsDeclarer declarer) {
          declarer.declare(new Fields("ID", "RECORD"));
      }
  
      @Override
      public Map<String, Object> getComponentConfiguration() {
          return null;
      }
  }
  