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 backtype.storm.testing;
  
  import backtype.storm.topology.OutputFieldsDeclarer;
  import java.util.Map;
  import backtype.storm.spout.SpoutOutputCollector;
  import backtype.storm.task.TopologyContext;
  import backtype.storm.topology.base.BaseRichSpout;
  import backtype.storm.tuple.Fields;
  import backtype.storm.tuple.Values;
  import backtype.storm.utils.InprocMessaging;
  import java.util.HashMap;
  import java.util.List;
  import java.util.UUID;
  
  public class FeederSpout extends BaseRichSpout {
      private int _id;
      private Fields _outFields;
      private SpoutOutputCollector _collector;
      private AckFailDelegate _ackFailDelegate;
  
      public FeederSpout(Fields outFields) {
          _id = InprocMessaging.acquireNewPort();
          _outFields = outFields;
      }
  
      public void setAckFailDelegate(AckFailDelegate d) {
          _ackFailDelegate = d;
      }
  
      public void feed(List<Object> tuple) {
          feed(tuple, UUID.randomUUID().toString());
      }
  
      public void feed(List<Object> tuple, Object msgId) {
          InprocMessaging.sendMessage(_id, new Values(tuple, msgId));
      }
  
      public void open(Map conf, TopologyContext context, SpoutOutputCollector collector) {
          _collector = collector;
      }
  
      public void close() {
  
      }
  
      public void nextTuple() {
          List<Object> toEmit = (List<Object>) InprocMessaging.pollMessage(_id);
          if (toEmit != null) {
              List<Object> tuple = (List<Object>) toEmit.get(0);
              Object msgId = toEmit.get(1);
  
              _collector.emit(tuple, msgId);
          } else {
              try {
                  Thread.sleep(1);
              } catch (InterruptedException e) {
                  throw new RuntimeException(e);
              }
          }
      }
  
      public void ack(Object msgId) {
          if (_ackFailDelegate != null) {
              _ackFailDelegate.ack(msgId);
          }
      }
  
      public void fail(Object msgId) {
          if (_ackFailDelegate != null) {
              _ackFailDelegate.fail(msgId);
          }
      }
  
      public void declareOutputFields(OutputFieldsDeclarer declarer) {
          declarer.declare(_outFields);
      }
  
      @Override
      public Map<String, Object> getComponentConfiguration() {
          return new HashMap<String, Object>();
      }
  }