content: package backtype.storm.testing;
  
  import backtype.storm.spout.ISpout;
  import backtype.storm.spout.SpoutOutputCollector;
  import backtype.storm.task.TopologyContext;
  import backtype.storm.utils.Utils;
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.UUID;
  import static backtype.storm.utils.Utils.get;
  
  public class FixedTupleSpout implements ISpout {
      private static final Map<String, Integer> acked = new HashMap<String, Integer>();
      private static final Map<String, Integer> failed = new HashMap<String, Integer>();
  
      public static int getNumAcked(String stormId) {
          synchronized(acked) {
              return get(acked, stormId, 0);
          }
      }
  
      public static int getNumFailed(String stormId) {
          synchronized(failed) {
              return get(failed, stormId, 0);
          }
      }
      
      public static void clear(String stormId) {
          acked.remove(stormId);
          failed.remove(stormId);
      }
  
      private List<FixedTuple> _tuples;
      private SpoutOutputCollector _collector;
  
      private TopologyContext _context;
      private List<FixedTuple> _serveTuples;
      private Map<String, FixedTuple> _pending;
  
      private String _id;
      
      public FixedTupleSpout(List tuples) {
          _id = UUID.randomUUID().toString();
          synchronized(acked) {
              acked.put(_id, 0);
          }
          synchronized(failed) {
              failed.put(_id, 0);
          }
          _tuples = new ArrayList<FixedTuple>();
          for(Object o: tuples) {
              FixedTuple ft;
              if(o instanceof FixedTuple) {
                  ft = (FixedTuple) o;
              } else {
                  ft = new FixedTuple((List) o);
              }
              _tuples.add(ft);
          }
      }
  
      public List<FixedTuple> getSourceTuples() {
          return _tuples;
      }
      
      public int getCompleted() {
          int ackedAmt;
          int failedAmt;
          
          synchronized(acked) {
              ackedAmt = acked.get(_id);
          }
          synchronized(failed) {
              failedAmt = failed.get(_id);
          }
          return ackedAmt + failedAmt;
      }
      
      public void cleanup() {
          synchronized(acked) {            
              acked.remove(_id);
          } 
          synchronized(failed) {            
              failed.remove(_id);
          }
      }
  
      public void open(Map conf, TopologyContext context, SpoutOutputCollector collector) {
          _context = context;
          List<Integer> tasks = context.getComponentTasks(context.getThisComponentId());
          int startIndex;
          for(startIndex=0; startIndex<tasks.size(); startIndex++) {
              if(tasks.get(startIndex)==context.getThisTaskId()) {
                  break;
              }
          }
          _collector = collector;
          _pending = new HashMap<String, FixedTuple>();
          _serveTuples = new ArrayList<FixedTuple>();
          for(int i=startIndex; i<_tuples.size(); i+=tasks.size()) {
              _serveTuples.add(_tuples.get(i));
          }
      }
  
      public void close() {
      }
  
      public void nextTuple() {
          if(_serveTuples.size()>0) {
              FixedTuple ft = _serveTuples.remove(0);
              String id = UUID.randomUUID().toString();
              _pending.put(id, ft);
              _collector.emit(ft.stream, ft.values, id);
          } else {
              Utils.sleep(100);
          }
      }
  
      public void ack(Object msgId) {
          synchronized(acked) {
              int curr = get(acked, _id, 0);
              acked.put(_id, curr+1);
          }
      }
  
      public void fail(Object msgId) {
          synchronized(failed) {
              int curr = get(failed, _id, 0);
              failed.put(_id, curr+1);
          }
      }
  }
  