Package org.apache.curator.test

Examples of org.apache.curator.test.Timing

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        final int PARTICIPANT_QTY = 10;

        ExecutorService executorService = Executors.newFixedThreadPool(PARTICIPANT_QTY);
        ExecutorCompletionService<Void> service = new ExecutorCompletionService<Void>(executorService);

        final Timing timing = new Timing();
        final CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
        try
        {
            client.start();

            final AtomicBoolean thereIsALeader = new AtomicBoolean(false);
            for ( int i = 0; i < PARTICIPANT_QTY; ++i )
            {
                service.submit(new Callable<Void>()
                {
                    @Override
                    public Void call() throws Exception
                    {
                        LeaderLatch latch = new LeaderLatch(client, PATH_NAME);
                        try
                        {
                            latch.start();
                            Assert.assertTrue(latch.await(timing.forWaiting().seconds(), TimeUnit.SECONDS));
                            Assert.assertTrue(thereIsALeader.compareAndSet(false, true));
                            Thread.sleep((int)(10 * Math.random()));
                        }
                        finally
                        {
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        final int PARTICIPANT_QTY = 10;
        final CountDownLatch timesSquare = new CountDownLatch(PARTICIPANT_QTY);
        final AtomicLong masterCounter = new AtomicLong(0);
        final AtomicLong notLeaderCounter = new AtomicLong(0);

        Timing timing = new Timing();
        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
        ExecutorService exec = Executors.newSingleThreadExecutor(new ThreadFactoryBuilder().setDaemon(true).setNameFormat("callbackSanity-%s").build());

        List<LeaderLatch> latches = Lists.newArrayList();
        for ( int i = 0; i < PARTICIPANT_QTY; ++i )
        {
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        final CountDownLatch timesSquare = new CountDownLatch(PARTICIPANT_QTY);
        final AtomicLong masterCounter = new AtomicLong(0);
        final AtomicLong notLeaderCounter = new AtomicLong(0);

        Timing timing = new Timing();
        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
        ExecutorService exec = Executors.newSingleThreadExecutor(new ThreadFactoryBuilder().setDaemon(true).setNameFormat("callbackNotifyLeader-%s").build());

        List<LeaderLatch> latches = Lists.newArrayList();
        for ( int i = 0; i < PARTICIPANT_QTY; ++i )
        {
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    public void testCallbackDontNotify() throws Exception
    {
        final AtomicLong masterCounter = new AtomicLong(0);
        final AtomicLong notLeaderCounter = new AtomicLong(0);

        Timing timing = new Timing();
        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));

        final LeaderLatch leader = new LeaderLatch(client, PATH_NAME);
        final LeaderLatch notifiedLeader = new LeaderLatch(client, PATH_NAME, "", LeaderLatch.CloseMode.NOTIFY_LEADER);

        leader.addListener(new LeaderLatchListener()
        {
            @Override
            public void isLeader()
            {
            }

            @Override
            public void notLeader()
            {
                masterCounter.incrementAndGet();
            }
        });

        notifiedLeader.addListener(new LeaderLatchListener()
        {
            @Override
            public void isLeader()
            {
            }

            @Override
            public void notLeader()
            {
                notLeaderCounter.incrementAndGet();
            }
        });

        try
        {
            client.start();

            leader.start();

            timing.sleepABit();

            notifiedLeader.start();

            timing.sleepABit();

            notifiedLeader.close();

            timing.sleepABit();

            // Test the close override
            leader.close(LeaderLatch.CloseMode.NOTIFY_LEADER);

            Assert.assertEquals(leader.getState(), LeaderLatch.State.CLOSED);
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    public void         testCrashedServerMultiInstances() throws Exception
    {
        List<Closeable>     closeables = Lists.newArrayList();
        try
        {
            Timing              timing = new Timing();
            CuratorFramework    client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
            closeables.add(client);
            client.start();

            final Semaphore             semaphore = new Semaphore(0);
            ServiceInstance<String>     instance1 = ServiceInstance.<String>builder().payload("thing").name("test").port(10064).build();
            ServiceInstance<String>     instance2 = ServiceInstance.<String>builder().payload("thing").name("test").port(10065).build();
            ServiceDiscovery<String>    discovery = new ServiceDiscoveryImpl<String>(client, "/test", new JsonInstanceSerializer<String>(String.class), instance1)
            {
                @Override
                protected void internalRegisterService(ServiceInstance<String> service) throws Exception
                {
                    super.internalRegisterService(service);
                    semaphore.release();
                }
            };
            closeables.add(discovery);
            discovery.start();
            discovery.registerService(instance2);

            timing.acquireSemaphore(semaphore, 2);
            Assert.assertEquals(discovery.queryForInstances("test").size(), 2);

            KillSession.kill(client.getZookeeperClient().getZooKeeper(), server.getConnectString());
            server.stop();

            server = new TestingServer(server.getPort(), server.getTempDirectory());
            closeables.add(server);

            timing.acquireSemaphore(semaphore, 2);
            Assert.assertEquals(discovery.queryForInstances("test").size(), 2);
        }
        finally
        {
            for ( Closeable c : closeables )
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    public void         testCrashedServer() throws Exception
    {
        List<Closeable>     closeables = Lists.newArrayList();
        try
        {
            Timing              timing = new Timing();
            CuratorFramework    client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
            closeables.add(client);
            client.start();

            final Semaphore             semaphore = new Semaphore(0);
            ServiceInstance<String>     instance = ServiceInstance.<String>builder().payload("thing").name("test").port(10064).build();
            ServiceDiscovery<String>    discovery = new ServiceDiscoveryImpl<String>(client, "/test", new JsonInstanceSerializer<String>(String.class), instance)
            {
                @Override
                protected void internalRegisterService(ServiceInstance<String> service) throws Exception
                {
                    super.internalRegisterService(service);
                    semaphore.release();
                }
            };
            closeables.add(discovery);
            discovery.start();

            timing.acquireSemaphore(semaphore);
            Assert.assertEquals(discovery.queryForInstances("test").size(), 1);

            KillSession.kill(client.getZookeeperClient().getZooKeeper(), server.getConnectString());
            server.stop();

            server = new TestingServer(server.getPort(), server.getTempDirectory());
            closeables.add(server);

            timing.acquireSemaphore(semaphore);
            Assert.assertEquals(discovery.queryForInstances("test").size(), 1);
        }
        finally
        {
            for ( Closeable c : closeables )
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    public void         testCrashedInstance() throws Exception
    {
        List<Closeable>     closeables = Lists.newArrayList();
        try
        {
            Timing              timing = new Timing();

            CuratorFramework    client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
            closeables.add(client);
            client.start();

            ServiceInstance<String>     instance = ServiceInstance.<String>builder().payload("thing").name("test").port(10064).build();
            ServiceDiscovery<String>    discovery = new ServiceDiscoveryImpl<String>(client, "/test", new JsonInstanceSerializer<String>(String.class), instance);
            closeables.add(discovery);
            discovery.start();

            Assert.assertEquals(discovery.queryForInstances("test").size(), 1);
           
            KillSession.kill(client.getZookeeperClient().getZooKeeper(), server.getConnectString());
            Thread.sleep(timing.multiple(1.5).session());

            Assert.assertEquals(discovery.queryForInstances("test").size(), 1);
        }
        finally
        {
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    }

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

        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
        client.start();
        try
        {
            final Semaphore semaphore = new Semaphore(0);
            final CountDownLatch interruptedLatch = new CountDownLatch(1);
            final AtomicInteger leaderCount = new AtomicInteger(0);
            LeaderSelectorListener listener = new LeaderSelectorListenerAdapter()
            {
                @Override
                public void takeLeadership(CuratorFramework client) throws Exception
                {
                    leaderCount.incrementAndGet();
                    try
                    {
                        semaphore.release();
                        try
                        {
                            Thread.currentThread().join();
                        }
                        catch ( InterruptedException e )
                        {
                            Thread.currentThread().interrupt();
                            interruptedLatch.countDown();
                        }
                    }
                    finally
                    {
                        leaderCount.decrementAndGet();
                    }
                }
            };
            LeaderSelector leaderSelector1 = new LeaderSelector(client, PATH_NAME, listener);
            LeaderSelector leaderSelector2 = new LeaderSelector(client, PATH_NAME, listener);

            boolean leaderSelector1Closed = false;
            boolean leaderSelector2Closed = false;

            leaderSelector1.start();
            leaderSelector2.start();

            Assert.assertTrue(timing.acquireSemaphore(semaphore, 1));

            KillSession.kill(client.getZookeeperClient().getZooKeeper(), server.getConnectString());

            Assert.assertTrue(timing.awaitLatch(interruptedLatch));
            timing.sleepABit();

            boolean requeued1 = leaderSelector1.requeue();
            boolean requeued2 = leaderSelector2.requeue();
            Assert.assertTrue(requeued1);
            Assert.assertTrue(requeued2);

            Assert.assertTrue(timing.acquireSemaphore(semaphore, 1));
            Assert.assertEquals(leaderCount.get(), 1);

            if ( leaderSelector1.hasLeadership() )
            {
                leaderSelector1.close();
                leaderSelector1Closed = true;
            }
            else if ( leaderSelector2.hasLeadership() )
            {
                leaderSelector2.close();
                leaderSelector2Closed = true;
            }
            else
            {
                fail("No leaderselector has leadership!");
            }

            // Verify that the other leader took over leadership.
            Assert.assertTrue(timing.acquireSemaphore(semaphore, 1));
            Assert.assertEquals(leaderCount.get(), 1);

            if ( !leaderSelector1Closed )
            {
                leaderSelector1.close();
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     * it uses autoRequeue instead of explicitly calling requeue
     */
    @Test
    public void testKillServerThenCloseShouldElectNewLeader() throws Exception
    {
        final Timing timing = new Timing();

        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
        client.start();
        try
        {
            final Semaphore semaphore = new Semaphore(0);
            final CountDownLatch interruptedLatch = new CountDownLatch(1);
            final AtomicInteger leaderCount = new AtomicInteger(0);
            LeaderSelectorListener listener = new LeaderSelectorListenerAdapter()
            {
                @Override
                public void takeLeadership(CuratorFramework client) throws Exception
                {
                    leaderCount.incrementAndGet();
                    try
                    {
                        semaphore.release();
                        try
                        {
                            Thread.currentThread().join();
                        }
                        catch ( InterruptedException e )
                        {
                            Thread.currentThread().interrupt();
                            interruptedLatch.countDown();
                        }
                    }
                    finally
                    {
                        leaderCount.decrementAndGet();
                    }
                }
            };
            LeaderSelector leaderSelector1 = new LeaderSelector(client, PATH_NAME, listener);
            LeaderSelector leaderSelector2 = new LeaderSelector(client, PATH_NAME, listener);

            boolean leaderSelector1Closed = false;
            boolean leaderSelector2Closed = false;

            leaderSelector1.autoRequeue();
            leaderSelector2.autoRequeue();

            leaderSelector1.start();
            leaderSelector2.start();

            Assert.assertTrue(timing.acquireSemaphore(semaphore, 1));

            int port = server.getPort();
            server.stop();
            timing.sleepABit();
            server = new TestingServer(port);
            Assert.assertTrue(timing.awaitLatch(interruptedLatch));
            timing.sleepABit();

            Assert.assertTrue(timing.acquireSemaphore(semaphore, 1));
            Assert.assertEquals(leaderCount.get(), 1);

            if ( leaderSelector1.hasLeadership() )
            {
                leaderSelector1.close();
                leaderSelector1Closed = true;
            }
            else if ( leaderSelector2.hasLeadership() )
            {
                leaderSelector2.close();
                leaderSelector2Closed = true;
            }
            else
            {
                fail("No leaderselector has leadership!");
            }

            // Verify that the other leader took over leadership.
            Assert.assertTrue(timing.acquireSemaphore(semaphore, 1));
            Assert.assertEquals(leaderCount.get(), 1);

            if ( !leaderSelector1Closed )
            {
                leaderSelector1.close();
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    public void testRotatingLeadership() throws Exception
    {
        final int LEADER_QTY = 5;
        final int REPEAT_QTY = 3;

        final Timing timing = new Timing();
        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
        client.start();
        try
        {
            final BlockingQueue<Integer> leaderList = new LinkedBlockingQueue<Integer>();
            List<LeaderSelector> selectors = Lists.newArrayList();
            for ( int i = 0; i < LEADER_QTY; ++i )
            {
                final int ourIndex = i;
                LeaderSelector leaderSelector = new LeaderSelector(client, PATH_NAME, new LeaderSelectorListener()
                {
                    @Override
                    public void takeLeadership(CuratorFramework client) throws Exception
                    {
                        timing.sleepABit();
                        leaderList.add(ourIndex);
                    }

                    @Override
                    public void stateChanged(CuratorFramework client, ConnectionState newState)
                    {
                    }
                });
                selectors.add(leaderSelector);
            }

            List<Integer> localLeaderList = Lists.newArrayList();
            for ( int i = 1; i <= REPEAT_QTY; ++i )
            {
                for ( LeaderSelector leaderSelector : selectors )
                {
                    if ( i > 1 )
                    {
                        leaderSelector.requeue();
                    }
                    else
                    {
                        leaderSelector.start();
                    }
                }

                while ( localLeaderList.size() != (i * selectors.size()) )
                {
                    Integer polledIndex = leaderList.poll(10, TimeUnit.SECONDS);
                    Assert.assertNotNull(polledIndex);
                    localLeaderList.add(polledIndex);
                }
                timing.sleepABit();
            }

            for ( LeaderSelector leaderSelector : selectors )
            {
                leaderSelector.close();
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