Package org.apache.curator.test

Examples of org.apache.curator.test.Timing

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    }

    @Test
    public void         testSimple() throws Exception
    {
        Timing                      timing = new Timing();
        DistributedQueue<String>    queue = null;
        CuratorFramework            client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
        try
        {
            client.start();

            final List<String>          messages = new CopyOnWriteArrayList<String>();
            final CountDownLatch        latch = new CountDownLatch(2);
            final Semaphore             semaphore = new Semaphore(0);
            QueueConsumer<String>       consumer = new QueueConsumer<String>()
            {
                @Override
                public void consumeMessage(String message) throws Exception
                {
                    messages.add(message);
                    semaphore.acquire();
                }

                @Override
                public void stateChanged(CuratorFramework client, ConnectionState newState)
                {
                }
            };
            queue = QueueBuilder.builder(client, consumer, serializer, "/queue").executor(Executors.newSingleThreadExecutor()).maxItems(1).buildQueue();
            queue.start();

            QueuePutListener<String>    listener = new QueuePutListener<String>()
            {
                @Override
                public void putCompleted(String item)
                {
                    latch.countDown();
                }

                @Override
                public void putMultiCompleted(MultiItem<String> items)
                {
                }
            };
            queue.getPutListenerContainer().addListener(listener);

            Assert.assertTrue(queue.put("1", timing.milliseconds(), TimeUnit.MILLISECONDS));   // should end up in consumer
            Assert.assertTrue(queue.put("2", timing.milliseconds(), TimeUnit.MILLISECONDS));   // should sit blocking in DistributedQueue
            Assert.assertTrue(timing.awaitLatch(latch));
            timing.sleepABit();
            Assert.assertFalse(queue.put("3", timing.multiple(.5).milliseconds(), TimeUnit.MILLISECONDS));

            semaphore.release(100);
            Assert.assertTrue(queue.put("3", timing.milliseconds(), TimeUnit.MILLISECONDS));
            Assert.assertTrue(queue.put("4", timing.milliseconds(), TimeUnit.MILLISECONDS));
            Assert.assertTrue(queue.put("5", timing.milliseconds(), TimeUnit.MILLISECONDS));

            for ( int i = 0; i < 5; ++i )
            {
                if ( messages.size() == 3 )
                {
                    break;
                }
                timing.sleepABit();
            }
            timing.sleepABit();

            Assert.assertEquals(messages, Arrays.asList("1", "2", "3", "4", "5"));
        }
        finally
        {
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public class TestDistributedDelayQueue extends BaseClassForTests
{
    @Test
    public void     testLateAddition() throws Exception
    {
        Timing                          timing = new Timing();
        DistributedDelayQueue<Long>     queue = null;
        CuratorFramework                client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
        client.start();
        try
        {
            BlockingQueueConsumer<Long> consumer = new BlockingQueueConsumer<Long>(Mockito.mock(ConnectionStateListener.class));
            queue = QueueBuilder.builder(client, consumer, new LongSerializer(), "/test").buildDelayQueue();
            queue.start();

            queue.put(1L, System.currentTimeMillis() + Integer.MAX_VALUE);  // never come out
            Long        value = consumer.take(1, TimeUnit.SECONDS);
            Assert.assertNull(value);

            queue.put(2L, System.currentTimeMillis());
            value = consumer.take(timing.seconds(), TimeUnit.SECONDS);
            Assert.assertEquals(value, Long.valueOf(2));

            value = consumer.take(1, TimeUnit.SECONDS);
            Assert.assertNull(value);
        }
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    }

    @Test
    public void     testBasic() throws Exception
    {
        Timing                          timing = new Timing();
        DistributedDelayQueue<Long>     queue = null;
        CuratorFramework                client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
        client.start();
        try
        {
            BlockingQueueConsumer<Long> consumer = new BlockingQueueConsumer<Long>(Mockito.mock(ConnectionStateListener.class));
            queue = QueueBuilder.builder(client, consumer, new LongSerializer(), "/test").buildDelayQueue();
            queue.start();

            queue.put(1L, System.currentTimeMillis() + 1000);
            Thread.sleep(100);
            Assert.assertEquals(consumer.size(), 0);    // delay hasn't been reached

            Long        value = consumer.take(timing.forWaiting().seconds(), TimeUnit.SECONDS);
            Assert.assertEquals(value, Long.valueOf(1));
        }
        finally
        {
            CloseableUtils.closeQuietly(queue);
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    @Test
    public void     testSimple() throws Exception
    {
        final int QTY = 10;

        Timing                          timing = new Timing();
        DistributedDelayQueue<Long>     queue = null;
        CuratorFramework                client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
        client.start();
        try
        {
            BlockingQueueConsumer<Long> consumer = new BlockingQueueConsumer<Long>(Mockito.mock(ConnectionStateListener.class));
            queue = QueueBuilder.builder(client, consumer, new LongSerializer(), "/test").buildDelayQueue();
            queue.start();

            Random random = new Random();
            for ( int i = 0; i < QTY; ++i )
            {
                long    delay = System.currentTimeMillis() + random.nextInt(100);
                queue.put(delay, delay);
            }

            long            lastValue = -1;
            for ( int i = 0; i < QTY; ++i )
            {
                Long        value = consumer.take(timing.forWaiting().seconds(), TimeUnit.SECONDS);
                Assert.assertNotNull(value);
                Assert.assertTrue(value >= lastValue);
                lastValue = value;
            }
        }
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    public void testSorting() throws Exception
    {
        //Need to use a fairly large number to ensure that sorting can take some time.
        final int QTY = 1000;

        Timing                          timing = new Timing();
        DistributedDelayQueue<Long>     putQueue = null;
        DistributedDelayQueue<Long>     getQueue = null;
        CuratorFramework                client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
        client.start();
        try
        {
            putQueue = QueueBuilder.builder(client, null, new LongSerializer(), "/test2").putInBackground(false).buildDelayQueue();
            putQueue.start();
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public class TestLeaderSelectorCluster
{
    @Test
    public void     testRestart() throws Exception
    {
        final Timing        timing = new Timing();

        CuratorFramework    client = null;
        TestingCluster      cluster = new TestingCluster(3);
        cluster.start();
        try
        {
            client = CuratorFrameworkFactory.newClient(cluster.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
            client.start();

            final Semaphore             semaphore = new Semaphore(0);
            LeaderSelectorListener      listener = new LeaderSelectorListener()
            {
                @Override
                public void takeLeadership(CuratorFramework client) throws Exception
                {
                    List<String>        names = client.getChildren().forPath("/leader");
                    Assert.assertTrue(names.size() > 0);
                    semaphore.release();
                }

                @Override
                public void stateChanged(CuratorFramework client, ConnectionState newState)
                {
                }
            };
            LeaderSelector      selector = new LeaderSelector(client, "/leader", listener);
            selector.autoRequeue();
            selector.start();
            Assert.assertTrue(timing.acquireSemaphore(semaphore));

            InstanceSpec connectionInstance = cluster.findConnectionInstance(client.getZookeeperClient().getZooKeeper());
            cluster.killServer(connectionInstance);

            Assert.assertTrue(timing.multiple(4).acquireSemaphore(semaphore));
        }
        finally
        {
            CloseableUtils.closeQuietly(client);
            CloseableUtils.closeQuietly(cluster);
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    }

    @Test
    public void     testLostRestart() throws Exception
    {
        final Timing        timing = new Timing();

        CuratorFramework    client = null;
        TestingCluster      cluster = new TestingCluster(3);
        cluster.start();
        try
        {
            client = CuratorFrameworkFactory.newClient(cluster.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
            client.start();
            client.sync().forPath("/");

            final AtomicReference<Exception>        error = new AtomicReference<Exception>(null);
            final AtomicReference<String>           lockNode = new AtomicReference<String>(null);
            final Semaphore                         semaphore = new Semaphore(0);
            final CountDownLatch                    lostLatch = new CountDownLatch(1);
            final CountDownLatch                    internalLostLatch = new CountDownLatch(1);
            LeaderSelectorListener                  listener = new LeaderSelectorListener()
            {
                @Override
                public void takeLeadership(CuratorFramework client) throws Exception
                {
                    try
                    {
                        List<String>        names = client.getChildren().forPath("/leader");
                        if ( names.size() != 1 )
                        {
                            semaphore.release();
                            Exception exception = new Exception("Names size isn't 1: " + names.size());
                            error.set(exception);
                            return;
                        }
                        lockNode.set(names.get(0));

                        semaphore.release();
                        if ( !timing.multiple(4).awaitLatch(internalLostLatch) )
                        {
                            error.set(new Exception("internalLostLatch await failed"));
                        }
                    }
                    finally
                    {
                        lostLatch.countDown();
                    }
                }

                @Override
                public void stateChanged(CuratorFramework client, ConnectionState newState)
                {
                    if ( newState == ConnectionState.LOST )
                    {
                        internalLostLatch.countDown();
                    }
                }
            };
            LeaderSelector      selector = new LeaderSelector(client, "/leader", listener);
            selector.start();
            Assert.assertTrue(timing.multiple(4).acquireSemaphore(semaphore));
            if ( error.get() != null )
            {
                throw new AssertionError(error.get());
            }

            Collection<InstanceSpec>    instances = cluster.getInstances();
            cluster.stop();

            Assert.assertTrue(timing.multiple(4).awaitLatch(lostLatch));
            timing.sleepABit();
            Assert.assertFalse(selector.hasLeadership());

            Assert.assertNotNull(lockNode.get());
           
            cluster = new TestingCluster(instances.toArray(new InstanceSpec[instances.size()]));
            cluster.start();

            try
            {
                client.delete().forPath(ZKPaths.makePath("/leader", lockNode.get()));   // simulate the lock deleting due to session expiration
            }
            catch ( Exception ignore )
            {
                // ignore
            }

            Assert.assertTrue(semaphore.availablePermits() == 0);
            Assert.assertFalse(selector.hasLeadership());

            selector.requeue();
            Assert.assertTrue(timing.multiple(4).acquireSemaphore(semaphore));
        }
        finally
        {
            CloseableUtils.closeQuietly(client);
            CloseableUtils.closeQuietly(cluster);
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    }

    @Test
    public void testMultiClientVersioned() throws Exception
    {
        Timing timing = new Timing();
        CuratorFramework client1 = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
        CuratorFramework client2 = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
        SharedCount count1 = new SharedCount(client1, "/count", 0);
        SharedCount count2 = new SharedCount(client2, "/count", 0);
        try
        {
            client1.start();
            client2.start();
            count1.start();
            count2.start();

            VersionedValue<Integer> versionedValue = count1.getVersionedValue();
            Assert.assertTrue(count1.trySetCount(versionedValue, 10));
            timing.sleepABit();
            versionedValue = count2.getVersionedValue();
            Assert.assertTrue(count2.trySetCount(versionedValue, 20));
            timing.sleepABit();

            VersionedValue<Integer> versionedValue1 = count1.getVersionedValue();
            VersionedValue<Integer> versionedValue2 = count2.getVersionedValue();
            Assert.assertTrue(count2.trySetCount(versionedValue2, 30));
            Assert.assertFalse(count1.trySetCount(versionedValue1, 40));
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    @Test
    public void testRaceAtStateChanged() throws Exception
    {
        LeaderSelector selector = null;
        Timing timing = new Timing();
        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
        try
        {
            client.start();

            final CountDownLatch takeLeadershipLatch = new CountDownLatch(1);
            final CountDownLatch lostLatch = new CountDownLatch(1);
            final CountDownLatch reconnectedLatch = new CountDownLatch(1);
            LeaderSelectorListener listener = new LeaderSelectorListener()
            {
                @Override
                public void takeLeadership(CuratorFramework client) throws Exception
                {
                    takeLeadershipLatch.countDown();  // should never get here
                }

                @Override
                public void stateChanged(CuratorFramework client, ConnectionState newState)
                {
                    if ( newState == ConnectionState.RECONNECTED )
                    {
                        reconnectedLatch.countDown();
                    }
                    else if ( newState == ConnectionState.LOST )
                    {
                        lostLatch.countDown();
                        throw new CancelLeadershipException();
                    }
                }
            };

            selector = new LeaderSelector(client, "/leader", listener);
            CountDownLatch debugLeadershipLatch = new CountDownLatch(1);
            CountDownLatch debugLeadershipWaitLatch = new CountDownLatch(1);
            selector.debugLeadershipLatch = debugLeadershipLatch;
            selector.debugLeadershipWaitLatch = debugLeadershipWaitLatch;

            selector.start();

            Assert.assertTrue(timing.awaitLatch(debugLeadershipLatch));
            server.stop();
            Assert.assertTrue(timing.awaitLatch(lostLatch));
            timing.sleepABit();
            debugLeadershipWaitLatch.countDown();

            server = new TestingServer(server.getPort(), server.getTempDirectory());
            Assert.assertTrue(timing.awaitLatch(reconnectedLatch));

            Assert.assertFalse(takeLeadershipLatch.await(3, TimeUnit.SECONDS));
        }
        finally
        {
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    }
   
    @Test
    public void     testErrorMode() throws Exception
    {
        Timing                    timing = new Timing();
        CuratorFramework          client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
        client.start();
        try
        {
            final AtomicReference<CountDownLatch>   latch = new AtomicReference<CountDownLatch>(new CountDownLatch(1));
            final AtomicInteger                     count = new AtomicInteger(0);
            QueueConsumer<TestQueueItem>            consumer = new QueueConsumer<TestQueueItem>()
            {
                @Override
                public void consumeMessage(TestQueueItem message) throws Exception
                {
                    if ( count.incrementAndGet() < 2 )
                    {
                        throw new Exception();
                    }
                    latch.get().countDown();
                }

                @Override
                public void stateChanged(CuratorFramework client, ConnectionState newState)
                {
                }
            };
            DistributedQueue<TestQueueItem> queue = QueueBuilder.builder(client, consumer, serializer, QUEUE_PATH).lockPath("/locks").buildQueue();
            try
            {
                queue.start();

                TestQueueItem       item = new TestQueueItem("1");
                queue.put(item);

                Assert.assertTrue(timing.awaitLatch(latch.get()));
                Assert.assertEquals(count.get(), 2);

                queue.setErrorMode(ErrorMode.DELETE);

                count.set(0);
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