Examples of java.util.concurrent.CountDownLatch.countDown()

Class java.util.concurrent.CountDownLatch

Examples of java.util.concurrent.CountDownLatch.countDown()

java.util.concurrent.CountDownLatch.countDown()
Decrements the count of the latch, releasing all waiting threads if the count reaches zero.
If the current count is greater than zero then it is decremented. If the new count is zero then all waiting threads are re-enabled for thread scheduling purposes.
If the current count equals zero then nothing happens.

      public void run() {
        try {
          HRegionInterface rrs = getRS();
          // Dummy call which should fail
          rrs.getHServerInfo();
          latch.countDown();
        } catch (IOException ex) {
          if (ex instanceof RemoteException) {
            ex = ((RemoteException) ex).unwrapRemoteException();
          }
          LOG.info("Slave cluster looks down: " + ex.getMessage());

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                @Override
                public void stateChanged(CuratorFramework client, ConnectionState newState)
                {
                    if ( newState == ConnectionState.LOST )
                    {
                        lostLatch.countDown();
                    }
                }
            };
            client.getConnectionStateListenable().addListener(listener);

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                {
                    if ( event.getType() == CuratorEventType.CREATE )
                    {
                        if ( event.getPath().equals("/head") )
                        {
                            latch.countDown();
                        }
                    }
                }
            };
            client.create().inBackground(callback).forPath("/head");

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                @Override
                public void processResult(CuratorFramework client, CuratorEvent event) throws Exception
                {
                    if ( event.getType() == CuratorEventType.SYNC )
                    {
                        latch.countDown();
                    }
                }
            };
            client.sync().inBackground(callback).forPath("/head");
            Assert.assertTrue(latch.await(10, TimeUnit.SECONDS));

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                        else if ( event.getType() == CuratorEventType.WATCHED )
                        {
                            if ( event.getWatchedEvent().getType() == Watcher.Event.EventType.NodeDataChanged )
                            {
                                Assert.assertEquals(event.getPath(), "/test");
                                watchedLatch.countDown();
                            }
                        }
                    }
                }
            );

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                    if ( data.getOperation().getClass().getName().contains("CreateBuilderImpl") )
                    {
                        long now = System.currentTimeMillis();
                        times.add(now - start.get());
                        start.set(now);
                        latch.countDown();
                    }
                }
            };


            server.stop();

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            {
                @Override
                public void processResult(CuratorFramework client, CuratorEvent event) throws Exception
                {
                    paths.add(event.getPath());
                    latch.countDown();
                }
            };
            client.create().inBackground(callback).forPath("/one");
            client.create().inBackground(callback).forPath("/one/two");
            client.create().inBackground(callback).forPath("/one/two/three");

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                public void processResult(CuratorFramework client, CuratorEvent event)
                    throws Exception
                {
                    if ( event.getResultCode() == Code.CONNECTIONLOSS.intValue() )
                    {
                        latch.countDown();
                    }
                }
            };
            // Stop the Zookeeper server
            server.stop();

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            };
            FutureTask<SimpleProblemCollector> task = new FutureTask<SimpleProblemCollector>(future);
            futures.add ( task);
            new Thread( task).start();
        }
        countDownLatch.countDown(); // Start all the threads
        for(Future<SimpleProblemCollector> result : futures){
            SimpleProblemCollector problemCollector = result.get(); // ArrayIndexOutOfBoundsException are typical indication of threading issues
            assertProblemFree(  problemCollector );
            
        }

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    if (rowLatch == null) {
      LOG.error("Releases row not locked, lockId: " + lockId + " row: "
          + rowKey);
      return;
    }
    rowLatch.countDown();
  }


  /**
   * See if row is currently locked.
   * @param lockid

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