Package org.apache.curator.framework

Examples of org.apache.curator.framework.CuratorFramework

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     * CURATOR-128: access root node within a namespace.
     */
    @Test
    public void     testRootAccess() throws Exception
    {
        CuratorFramework    client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
        try
        {
            client.start();

            client.create().forPath("/one");
            Assert.assertNotNull(client.getZookeeperClient().getZooKeeper().exists("/one", false));

            Assert.assertNotNull(client.checkExists().forPath("/"));
            try
            {
                client.checkExists().forPath("");
                Assert.fail("IllegalArgumentException expected");
            }
            catch ( IllegalArgumentException expected )
            {
            }

            Assert.assertNotNull(client.usingNamespace("one").checkExists().forPath("/"));
            try
            {
                client.usingNamespace("one").checkExists().forPath("");
                Assert.fail("IllegalArgumentException expected");
            }
            catch ( IllegalArgumentException expected )
            {
            }
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    @Test
    public void     testIsStarted() throws Exception
    {
        CuratorFramework    client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
        client.start();
        CuratorFramework    namespaced = client.usingNamespace(null);

        Assert.assertEquals(client.getState(), namespaced.getState(), "Namespaced state did not match true state after call to start.");

        client.close();
        Assert.assertEquals(client.getState(), namespaced.getState(), "Namespaced state did not match true state after call to close.");
    }
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     * @throws Exception
     */
    @Test
    public void testACL() throws Exception
    {
        CuratorFramework    client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
        client.start();
        client.getZookeeperClient().blockUntilConnectedOrTimedOut();

        client.create().creatingParentsIfNeeded().forPath("/parent/child", "A string".getBytes());
        CuratorFramework client2 = client.usingNamespace("parent");

        Assert.assertNotNull(client2.getData().forPath("/child")); 
        client.setACL().withACL(Collections.singletonList(
            new ACL(ZooDefs.Perms.WRITE, ZooDefs.Ids.ANYONE_ID_UNSAFE))).
                forPath("/parent/child");
        // This will attempt to setACL on /parent/child, Previously this failed because /child
        // isn't present. Using "child" would case a failure because the path didn't start with
        // a slash
        try
        {
            List<ACL> acls = client2.getACL().forPath("/child");
            Assert.assertNotNull(acls);
            Assert.assertEquals(acls.size(), 1);
            Assert.assertEquals(acls.get(0).getId(), ZooDefs.Ids.ANYONE_ID_UNSAFE);
            Assert.assertEquals(acls.get(0).getPerms(), ZooDefs.Perms.WRITE);
            client2.setACL().withACL(Collections.singletonList(
                new ACL(ZooDefs.Perms.DELETE, ZooDefs.Ids.ANYONE_ID_UNSAFE))).
                    forPath("/child");
            Assert.fail("Expected auth exception was not thrown");
        }
        catch(NoAuthException e)
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public class TestMultiClient extends BaseClassForTests
{
    @Test
    public void     testNotify() throws Exception
    {
        CuratorFramework client1 = null;
        CuratorFramework client2 = null;
        try
        {
            client1 = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
            client2 = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));

            client1.start();
            client2.start();

            final CountDownLatch        latch = new CountDownLatch(1);
            client1.getCuratorListenable().addListener
            (
                new CuratorListener()
                {
                    @Override
                    public void eventReceived(CuratorFramework client, CuratorEvent event) throws Exception
                    {
                        if ( event.getType() == CuratorEventType.WATCHED )
                        {
                            if ( event.getWatchedEvent().getType() == Watcher.Event.EventType.NodeDataChanged )
                            {
                                if ( event.getPath().equals("/test") )
                                {
                                    latch.countDown();
                                }
                            }
                        }
                    }
                }
            );

            client1.create().forPath("/test", new byte[]{1, 2, 3});
            client1.checkExists().watched().forPath("/test");

            client2.getCuratorListenable().addListener
            (
                new CuratorListener()
                {
                    @Override
                    public void eventReceived(CuratorFramework client, CuratorEvent event) throws Exception
                    {
                        if ( event.getType() == CuratorEventType.SYNC )
                        {
                            client.setData().forPath("/test", new byte[]{10, 20});
                        }
                    }
                }
            );

            client2.sync().forPath("/test");

            Assert.assertTrue(latch.await(10, TimeUnit.SECONDS));
        }
        finally
        {
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    @Test
    public void testConnectionStateNewClient() throws Exception
    {
        Timing timing = new Timing();
        TestingCluster cluster = new TestingCluster(3);
        CuratorFramework client = null;
        try
        {
            cluster.start();

            client = CuratorFrameworkFactory.newClient(cluster.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(100));
            client.start();
            client.checkExists().forPath("/");
            client.close();
            client = null;

            Iterator<InstanceSpec> iterator = cluster.getInstances().iterator();
            for ( int i = 0; i < 2; ++i )
            {
                cluster.killServer(iterator.next());
            }

            client = CuratorFrameworkFactory.builder()
                .connectString(cluster.getConnectString())
                .sessionTimeoutMs(timing.session())
                .connectionTimeoutMs(timing.connection())
                .retryPolicy(new RetryNTimes(3, timing.milliseconds()))
                .canBeReadOnly(true)
                .build();

            final BlockingQueue<ConnectionState> states = Queues.newLinkedBlockingQueue();
            client.getConnectionStateListenable().addListener
            (
                new ConnectionStateListener()
                {
                    @Override
                    public void stateChanged(CuratorFramework client, ConnectionState newState)
                    {
                        states.add(newState);
                    }
                }
            );
            client.start();

            client.checkExists().forPath("/");

            ConnectionState state = states.poll(timing.forWaiting().milliseconds(), TimeUnit.MILLISECONDS);
            Assert.assertEquals(state, ConnectionState.READ_ONLY);
        }
        finally
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    @Test
    public void testReadOnly() throws Exception
    {
        Timing timing = new Timing();

        CuratorFramework client = null;
        TestingCluster cluster = new TestingCluster(2);
        try
        {
            cluster.start();

            client = CuratorFrameworkFactory.builder().connectString(cluster.getConnectString()).canBeReadOnly(true).connectionTimeoutMs(timing.connection()).sessionTimeoutMs(timing.session()).retryPolicy(new ExponentialBackoffRetry(100, 3)).build();
            client.start();

            client.create().forPath("/test");

            final CountDownLatch readOnlyLatch = new CountDownLatch(1);
            final CountDownLatch reconnectedLatch = new CountDownLatch(1);
            ConnectionStateListener listener = new ConnectionStateListener()
            {
                @Override
                public void stateChanged(CuratorFramework client, ConnectionState newState)
                {
                    if ( newState == ConnectionState.READ_ONLY )
                    {
                        readOnlyLatch.countDown();
                    }
                    else if ( newState == ConnectionState.RECONNECTED )
                    {
                        reconnectedLatch.countDown();
                    }
                }
            };
            client.getConnectionStateListenable().addListener(listener);

            InstanceSpec ourInstance = cluster.findConnectionInstance(client.getZookeeperClient().getZooKeeper());
            Iterator<InstanceSpec> iterator = cluster.getInstances().iterator();
            InstanceSpec killInstance = iterator.next();
            if ( killInstance.equals(ourInstance) )
            {
                killInstance = iterator.next(); // kill the instance we're not connected to
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    {
        server.stop();

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

            final AtomicBoolean resetCalled = new AtomicBoolean(false);
            final CountDownLatch cancelStartTaskLatch = new CountDownLatch(1);
            latch = new LeaderLatch(client, PATH_NAME)
            {
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    @Test
    public void testResetRace() throws Exception
    {
        Timing timing = new Timing();
        LeaderLatch latch = null;
        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
        try
        {
            client.start();
            latch = new LeaderLatch(client, PATH_NAME);

            latch.debugResetWaitLatch = new CountDownLatch(1);
            latch.start();  // will call reset()
            latch.reset();  // should not result in two nodes

            timing.sleepABit();

            latch.debugResetWaitLatch.countDown();

            timing.sleepABit();

            Assert.assertEquals(client.getChildren().forPath(PATH_NAME).size(), 1);
        }
        finally
        {
            CloseableUtils.closeQuietly(latch);
            CloseableUtils.closeQuietly(client);
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    @Test
    public void testCreateDeleteRace() throws Exception
    {
        Timing timing = new Timing();
        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
        try
        {
            client.start();
            client.create().creatingParentsIfNeeded().forPath(PATH_NAME);

            LeaderLatch latch = new LeaderLatch(client, PATH_NAME);

            latch.debugResetWaitLatch = new CountDownLatch(1);

            latch.start();
            latch.close();

            timing.sleepABit();

            latch.debugResetWaitLatch.countDown();

            timing.sleepABit();

            Assert.assertEquals(client.getChildren().forPath(PATH_NAME).size(), 0);

        }
        finally
        {
            CloseableUtils.closeQuietly(client);
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        final int PARTICIPANT_QTY = 10;

        List<LeaderLatch> latches = Lists.newArrayList();

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

            final CountDownLatch countDownLatch = new CountDownLatch(1);
            client.getConnectionStateListenable().addListener(new ConnectionStateListener()
            {
                @Override
                public void stateChanged(CuratorFramework client, ConnectionState newState)
                {
                    if ( newState == ConnectionState.LOST )
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