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.alibaba.jstorm.flux.examples;
  
  import backtype.storm.Config;
  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 backtype.storm.utils.Utils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Random;
  
  /**
   * @author JohnFang (xiaojian.fxj@alibaba-inc.com).
   */
  public class WordSpout extends BaseRichSpout {
      public static Logger LOG = LoggerFactory.getLogger(WordSpout.class);
      boolean _isDistributed;
      SpoutOutputCollector _collector;
  
      public WordSpout() {
          this(true);
      }
  
      public WordSpout(boolean isDistributed) {
          _isDistributed = isDistributed;
      }
  
      public void open(Map conf, TopologyContext context, SpoutOutputCollector collector) {
          _collector = collector;
      }
  
      public void close() {
  
      }
  
      public void nextTuple() {
          Utils.sleep(100);
          final String[] words = new String[] { "nathan", "mike", "jackson", "golda", "bertels" };
          final Random rand = new Random();
          final String word = words[rand.nextInt(words.length)];
          _collector.emit(new Values(word));
      }
  
      public void ack(Object msgId) {
  
      }
  
      public void fail(Object msgId) {
  
      }
  
      public void declareOutputFields(OutputFieldsDeclarer declarer) {
          declarer.declare(new Fields("word"));
      }
  
      @Override
      public Map<String, Object> getComponentConfiguration() {
          if (!_isDistributed) {
              Map<String, Object> ret = new HashMap<String, Object>();
              ret.put(Config.TOPOLOGY_MAX_TASK_PARALLELISM, 1);
              return ret;
          } else {
              return null;
          }
      }
  }