Apache风暴中的单元测试 - 使用BaseRichBolt超时但不使用BaseBasicBolt

Question

我正在尝试为风暴螺栓（Java）实现单元测试。下面的代码工作正常，并在风暴1.0.3与成功结束：

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 3.887 sec

然而，当我上线46改变BaseBasicParrotBolt到BaseRichParrotBolt，因此断言不会运行，并将其与下面的异常结束：

13610 [main] ERROR o.a.s.testing4j - Error in cluster java.lang.AssertionError: Test timed out (10000ms) (not (every? exhausted? (spout-objects spouts)))

如果你通过它一步一个调试器，你会看到，螺栓不接收和发射元组，但它似乎是Testing.completeTopology永远不会返回。我觉得这很奇怪，因为螺栓几乎是相同的。我所有的螺栓从BaseRichBolt延伸，所以我真的很想让它为那些工作。有任何想法吗？

import java.util.Map; 
import org.apache.storm.Config; 
import org.apache.storm.ILocalCluster; 
import org.apache.storm.Testing; 
import org.apache.storm.generated.StormTopology; 
import org.apache.storm.spout.SpoutOutputCollector; 
import org.apache.storm.task.OutputCollector; 
import org.apache.storm.task.TopologyContext; 
import org.apache.storm.testing.CompleteTopologyParam; 
import org.apache.storm.testing.MkClusterParam; 
import org.apache.storm.testing.MockedSources; 
import org.apache.storm.testing.TestJob; 
import org.apache.storm.topology.BasicOutputCollector; 
import org.apache.storm.topology.OutputFieldsDeclarer; 
import org.apache.storm.topology.TopologyBuilder; 
import org.apache.storm.topology.base.BaseBasicBolt; 
import org.apache.storm.topology.base.BaseRichBolt; 
import org.apache.storm.topology.base.BaseRichSpout; 
import org.apache.storm.tuple.Fields; 
import org.apache.storm.tuple.Tuple; 
import org.apache.storm.tuple.Values; 
import java.util.Arrays; 
import java.util.List; 
import static junit.framework.Assert.*; 
import org.junit.Test; 

public class StormTestExample { 
    private final static String EVENT = "event"; 
    private final static String SPOUT_ID = "spout"; 
    private final static String BOLT_ID = "parrot"; 
    private final static List<String> COMPONENT_IDS = Arrays.asList(SPOUT_ID, BOLT_ID); 

    @Test 
    public void testBasicTopology() { 
     MkClusterParam mkClusterParam = new MkClusterParam(); 
     mkClusterParam.setSupervisors(4); 
     Config daemonConf = new Config(); 
     daemonConf.put(Config.STORM_LOCAL_MODE_ZMQ, false); 
     mkClusterParam.setDaemonConf(daemonConf); 

     Testing.withSimulatedTimeLocalCluster(mkClusterParam, new TestJob() { 
      @Override 
      public void run(ILocalCluster cluster) { 
       TopologyBuilder builder = new TopologyBuilder(); 
       builder.setSpout(SPOUT_ID, new TestSpout()); 
       builder.setBolt(BOLT_ID, new BaseBasicParrotBolt()).shuffleGrouping(SPOUT_ID); 
       StormTopology topology = builder.createTopology(); 

       MockedSources mockedSources = new MockedSources(); 
       mockedSources.addMockData(SPOUT_ID, 
         new Values("nathan"), 
         new Values("bob"), 
         new Values("joey"), 
         new Values("nathan")); 

       Config conf = new Config(); 
       conf.setNumWorkers(2); 

       CompleteTopologyParam completeTopologyParam = new CompleteTopologyParam(); 
       completeTopologyParam.setMockedSources(mockedSources); 
       completeTopologyParam.setStormConf(conf); 

       final Map result = Testing.completeTopology(cluster, topology, completeTopologyParam); 

       final Values expected = new Values(new Values("nathan"), new Values("bob"), new Values("joey"), 
         new Values("nathan")); 

       for (String component : COMPONENT_IDS) { 
        assertTrue("Error in " + component + " output", 
           Testing.multiseteq(expected, Testing.readTuples(result, component))); 
       } 
      } 
     }); 
    } 

    private static class TestSpout extends BaseRichSpout {  
     @Override 
     public void declareOutputFields(OutputFieldsDeclarer ofd) { 
      ofd.declare(new Fields(EVENT)); 
     } 

     @Override 
     public void open(Map map, TopologyContext tc, SpoutOutputCollector soc) { 
      throw new UnsupportedOperationException(); // Don't need an implementation to run the test. 
     } 

     @Override 
     public void nextTuple() { 
      throw new UnsupportedOperationException(); // Don't need an implementation to run the test. 
     } 
    } 

    private static class BaseBasicParrotBolt extends BaseBasicBolt {  
     @Override 
     public void declareOutputFields(OutputFieldsDeclarer ofd) { 
      ofd.declare(new Fields(EVENT)); 
     } 

     @Override 
     public void execute(Tuple tuple, BasicOutputCollector boc) { 
      boc.emit(new Values(tuple.getValue(0))); 
     } 
    } 

    private static class BaseRichParrotBolt extends BaseRichBolt { 
     private OutputCollector oc; 

     @Override 
     public void declareOutputFields(OutputFieldsDeclarer ofd) { 
      ofd.declare(new Fields(EVENT)); 
     } 

     @Override 
     public void prepare(Map map, TopologyContext tc, OutputCollector oc) { 
      this.oc = oc; 
     } 

     @Override 
     public void execute(Tuple tuple) { 
      oc.emit(new Values(tuple.getValue(0))); 
     } 
    } 
} 

Answer 1

如果使用BaseRichBolt，你应该叫ACK（）在自己的execute（），这是由BaseBasicBolt处理。