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.deploy;
  
  import backtype.storm.spout.SpoutOutputCollector;
  import backtype.storm.task.TopologyContext;
  import backtype.storm.topology.OutputFieldsDeclarer;
  import backtype.storm.topology.base.BaseRichSpout;
  import backtype.storm.tuple.Fields;
  import backtype.storm.tuple.Values;
  import com.alibaba.jstorm.utils.JStormUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.List;
  import java.util.Map;
  import java.util.Random;
  
  /**
   * @author JohnFang (xiaojian.fxj@alibaba-inc.com).
   */
  public class DeploySpoult extends BaseRichSpout {
  
      private final static Logger LOG = LoggerFactory.getLogger(DeploySpoult.class);
      private int _sizeInBytes;
      private long _messageCount;
      private SpoutOutputCollector _collector;
      private String[] _messages = null;
      private boolean _ackEnabled;
      private Random _rand = null;
  
      private Map<String, List<Integer>> _sourceTasks;
      private Map<String, List<Integer>> _targetTasks;
      private TopologyContext context;
  
  
      public DeploySpoult(int sizeInBytes, boolean ackEnabled) {
          if (sizeInBytes < 0) {
              sizeInBytes = 0;
          }
          _sizeInBytes = sizeInBytes;
          _messageCount = 0;
          _ackEnabled = ackEnabled;
      }
  
      public boolean isDistributed() {
          return true;
      }
  
      public void open(Map conf, TopologyContext context, SpoutOutputCollector collector) {
          _rand = new Random();
          this.context = context;
          _collector = collector;
          final int differentMessages = 100;
          _messages = new String[differentMessages];
          for (int i = 0; i < differentMessages; i++) {
              StringBuilder sb = new StringBuilder(_sizeInBytes);
              //Even though java encodes strings in UCS2, the serialized version sent by the tuples
              // is UTF8, so it should be a single byte
              for (int j = 0; j < _sizeInBytes; j++) {
                  sb.append(_rand.nextInt(9));
              }
              _messages[i] = sb.toString();
          }
          _sourceTasks = context.getThisSourceComponentTasks();
          _targetTasks = context.getThisTargetComponentTasks();
          LOG.info("this component's sourceTasks is {}, and the target tasks is {}", _sourceTasks, _targetTasks);
      }
  
      @Override
      public void close() {
  
          if (JStormUtils.isKilledStatus(context)){
              JStormUtils.sleepMs(10);
              int sendNum = 0;
              for (List<Integer> tasks : _targetTasks.values()) {
                  for (Integer task : tasks) {
                      sendNum++;
                      _collector.emitDirect(task, new Values());
                  }
              }
              _collector.flush();
              LOG.info("this component already sent {} finish messages", sendNum);
              JStormUtils.sleepMs(100);
          }
      }
  
  
      public void nextTuple() {
          JStormUtils.sleepMs(1);
          final String message = _messages[_rand.nextInt(_messages.length)];
          if (_ackEnabled) {
              _collector.emit(new Values(message), _messageCount);
          } else {
              _collector.emit(new Values(message));
          }
          _messageCount++;
      }
  
  
      @Override
      public void ack(Object msgId) {
          //Empty
      }
  
      @Override
      public void fail(Object msgId) {
          //Empty
      }
  
      public void declareOutputFields(OutputFieldsDeclarer declarer) {
          declarer.declare(new Fields("message"));
      }
  
  }