fix Junit test bug

src/test/java/com/lmax/disruptor/RemoveWorkHandlerTest.java

@@ -23,7 +23,6 @@ public class RemoveWorkHandlerTest
     public void removeWorkHandlerLostEventExample() throws InterruptedException
     {
         int eventSize = 8;
-        Set<Integer> data = initData(0, eventSize);
         CountDownLatch countDownLatch = new CountDownLatch(2 * eventSize);
         AtomicInteger count = new AtomicInteger();
 
@@ -32,7 +31,7 @@ public void removeWorkHandlerLostEventExample() throws InterruptedException
 
         // Build a disruptor and start it.
         Disruptor<StubEvent> disruptor = new Disruptor<>(
-                StubEvent.EVENT_FACTORY, 16, DaemonThreadFactory.INSTANCE);
+                StubEvent.EVENT_FACTORY, 4, DaemonThreadFactory.INSTANCE);
         RingBuffer<StubEvent> ringBuffer = disruptor.start();
 
         // Construct 2 batch event processors.
@@ -57,13 +56,17 @@ public void removeWorkHandlerLostEventExample() throws InterruptedException
         handler2.awaitStart();
 
         //add event
-        new MessageProducer(disruptor, data).addEvent();
+        MessageProducer producer1 = new MessageProducer(disruptor, initData(0, eventSize));
+        new Thread(producer1).start();
+        producer1.awaitStart();
 
         // use halt remove a processor will lost a event
         processor1.halt();
 
         //Make sure new event are added after processor1.halt()
-        new MessageProducer(disruptor, initData(eventSize, eventSize)).addEvent();
+        MessageProducer producer2 = new MessageProducer(disruptor, initData(eventSize, eventSize));
+        new Thread(producer2).start();
+        producer2.awaitStart();
 
         //waiting remove complete
         handler1.awaitShutdown();
@@ -92,7 +95,7 @@ public void removeWorkHandlerLaterTest() throws InterruptedException
 
         // Build a disruptor and start it.
         Disruptor<StubEvent> disruptor = new Disruptor<>(
-                StubEvent.EVENT_FACTORY, 16, DaemonThreadFactory.INSTANCE);
+                StubEvent.EVENT_FACTORY, 4, DaemonThreadFactory.INSTANCE);
         RingBuffer<StubEvent> ringBuffer = disruptor.start();
 
         // Construct 2 batch event processors.
@@ -116,14 +119,17 @@ public void removeWorkHandlerLaterTest() throws InterruptedException
         handler1.awaitStart();
         handler2.awaitStart();
 
-        new MessageProducer(disruptor, initData(0, eventSize)).addEvent();
+        MessageProducer producer1 = new MessageProducer(disruptor, initData(0, eventSize));
+        new Thread(producer1).start();
+        producer1.awaitStart();
 
         // haltLater will wait the last event consume
         processor1.haltLater();
 
         //Make sure new event are added after processor1.haltLater()
-        new MessageProducer(disruptor, initData(eventSize, eventSize)).addEvent();
-
+        MessageProducer producer2 = new MessageProducer(disruptor, initData(eventSize, eventSize));
+        new Thread(producer2).start();
+        producer2.awaitStart();
 
         handler1.awaitShutdown();
 
@@ -143,10 +149,11 @@ private Set<Integer> initData(int start, int size)
     }
 }
 
-class MessageProducer
+class MessageProducer implements Runnable
 {
-    Disruptor<StubEvent> disruptor;
-    Set<Integer> dataSet;
+    private Disruptor<StubEvent> disruptor;
+    private Set<Integer> dataSet;
+    private CountDownLatch startLatch = new CountDownLatch(1);
 
     MessageProducer(Disruptor<StubEvent> disruptor, Set<Integer> dataSet)
     {
@@ -170,6 +177,29 @@ void addEvent()
             }
         }
     }
+
+    /**
+     * When an object implementing interface <code>Runnable</code> is used
+     * to create a thread, starting the thread causes the object's
+     * <code>run</code> method to be called in that separately executing
+     * thread.
+     * <p>
+     * The general contract of the method <code>run</code> is that it may
+     * take any action whatsoever.
+     *
+     * @see Thread#run()
+     */
+    @Override
+    public void run()
+    {
+        startLatch.countDown();
+        addEvent();
+    }
+
+    public void awaitStart() throws InterruptedException
+    {
+        startLatch.await();
+    }
 }
 
 class DynamicHandler implements WorkHandler<StubEvent>, LifecycleAware
@@ -214,6 +244,10 @@ public void onEvent(StubEvent event) throws Exception
     {
         countdownlatch.countDown();
         completeCount.incrementAndGet();
+        System.out.println(
+                "thread id == " + Thread.currentThread().getId() + " ,event ==> " + event.getValue()
+        );
+        Thread.yield();
     }
 }