Package org.apache.curator.framework

Examples of org.apache.curator.framework.CuratorFramework

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    }

    @Test
    public void     testBackgroundCreate() throws Exception
    {
        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
        client.start();
        try
        {
            client.getCuratorListenable().addListener
            (
                new CuratorListener()
                {
                    @Override
                    public void eventReceived(CuratorFramework client, CuratorEvent event) throws Exception
                    {
                        if ( event.getType() == CuratorEventType.CREATE )
                        {
                            Assert.assertEquals(event.getPath(), "/test");
                            ((CountDownLatch)event.getContext()).countDown();
                        }
                    }
                }
            );

            CountDownLatch     latch = new CountDownLatch(1);
            client.create().inBackground(latch).forPath("/test", new byte[]{1, 2, 3});
            Assert.assertTrue(latch.await(10, TimeUnit.SECONDS));
        }
        finally
        {
            client.close();
        }
    }
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    }

    @Test
    public void     testCreateModes() throws Exception
    {
        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
        client.start();
        try
        {
            byte[]  writtenBytes = {1, 2, 3};
            client.create().forPath("/test", writtenBytes); // should be persistent

            client.close();
            client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
            client.start();

            byte[]  readBytes = client.getData().forPath("/test");
            Assert.assertEquals(writtenBytes, readBytes);

            client.create().withMode(CreateMode.EPHEMERAL).forPath("/ghost", writtenBytes);

            client.close();
            client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
            client.start();

            readBytes = client.getData().forPath("/test");
            Assert.assertEquals(writtenBytes, readBytes);
            Stat    stat = client.checkExists().forPath("/ghost");
            Assert.assertNull(stat);

            String  realPath = client.create().withMode(CreateMode.PERSISTENT_SEQUENTIAL).forPath("/pseq", writtenBytes);
            Assert.assertNotSame(realPath, "/pseq");

            client.close();
            client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
            client.start();

            readBytes = client.getData().forPath(realPath);
            Assert.assertEquals(writtenBytes, readBytes);

            realPath = client.create().withMode(CreateMode.EPHEMERAL_SEQUENTIAL).forPath("/eseq", writtenBytes);
            Assert.assertNotSame(realPath, "/eseq");

            client.close();
            client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
            client.start();

            stat = client.checkExists().forPath(realPath);
            Assert.assertNull(stat);
        }
        finally
        {
            client.close();
        }
    }
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    }

    @Test
    public void     testSimple() throws Exception
    {
        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
        client.start();
        try
        {
            String    path = client.create().withMode(CreateMode.PERSISTENT).forPath("/test", new byte[]{1, 2, 3});
            Assert.assertEquals(path, "/test");
        }
        finally
        {
            client.close();
        }
    }
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    public void testListenerConnectedAtStart() throws Exception
    {
        server.close();

        Timing timing = new Timing(2);
        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryNTimes(0, 0));
        try
        {
            client.start();

            final CountDownLatch connectedLatch = new CountDownLatch(1);
            final AtomicBoolean firstListenerAction = new AtomicBoolean(true);
            final AtomicReference<ConnectionState> firstListenerState = new AtomicReference<ConnectionState>();
            ConnectionStateListener listener = new ConnectionStateListener()
            {
                @Override
                public void stateChanged(CuratorFramework client, ConnectionState newState)
                {
                    if ( firstListenerAction.compareAndSet(true, false) )
                    {
                        firstListenerState.set(newState);
                        System.out.println("First listener state is " + newState);
                    }
                    if ( newState == ConnectionState.CONNECTED )
                    {
                        connectedLatch.countDown();
                    }
                }
            };
            client.getConnectionStateListenable().addListener(listener);

            // due to CURATOR-72, this was causing a LOST event to precede the CONNECTED event
            client.create().inBackground().forPath("/foo");

            server = new TestingServer(server.getPort());

            Assert.assertTrue(timing.awaitLatch(connectedLatch));
            Assert.assertFalse(firstListenerAction.get());
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    @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
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{
    @Test
    public void     testConnectionState() throws Exception
    {
        Timing                  timing = new Timing();
        CuratorFramework        client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
        try
        {
            final BlockingQueue<ConnectionState>        queue = new LinkedBlockingQueue<ConnectionState>();
            ConnectionStateListener                     listener = new ConnectionStateListener()
            {
                @Override
                public void stateChanged(CuratorFramework client, ConnectionState newState)
                {
                    queue.add(newState);
                }
            };
            client.getConnectionStateListenable().addListener(listener);

            client.start();
            Assert.assertEquals(queue.poll(timing.multiple(4).seconds(), TimeUnit.SECONDS), ConnectionState.CONNECTED);
            server.stop();
            Assert.assertEquals(queue.poll(timing.multiple(4).seconds(), TimeUnit.SECONDS), ConnectionState.SUSPENDED);
            Assert.assertEquals(queue.poll(timing.multiple(4).seconds(), TimeUnit.SECONDS), ConnectionState.LOST);
        }
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    @Test
    public void     testNamespaceWithWatcher() throws Exception
    {
        CuratorFrameworkFactory.Builder builder = CuratorFrameworkFactory.builder();
        CuratorFramework client = builder.connectString(server.getConnectString()).namespace("aisa").retryPolicy(new RetryOneTime(1)).build();
        client.start();
        try
        {
            final BlockingQueue<String>     queue = new LinkedBlockingQueue<String>();
            Watcher                         watcher = new Watcher()
            {
                @Override
                public void process(WatchedEvent event)
                {
                    try
                    {
                        queue.put(event.getPath());
                    }
                    catch ( InterruptedException e )
                    {
                        throw new Error(e);
                    }
                }
            };
            client.create().forPath("/base");
            client.getChildren().usingWatcher(watcher).forPath("/base");
            client.create().forPath("/base/child");

            String      path = queue.take();
            Assert.assertEquals(path, "/base");
        }
        finally
        {
            client.close();
        }
    }
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    @Test
    public void     testNamespaceInBackground() throws Exception
    {
        CuratorFrameworkFactory.Builder builder = CuratorFrameworkFactory.builder();
        CuratorFramework client = builder.connectString(server.getConnectString()).namespace("aisa").retryPolicy(new RetryOneTime(1)).build();
        client.start();
        try
        {
            final BlockingQueue<String>     queue = new LinkedBlockingQueue<String>();
            CuratorListener                 listener = new CuratorListener()
            {
                @Override
                public void eventReceived(CuratorFramework client, CuratorEvent event) throws Exception
                {
                    if ( event.getType() == CuratorEventType.EXISTS )
                    {
                        queue.put(event.getPath());
                    }
                }
            };

            client.getCuratorListenable().addListener(listener);
            client.create().forPath("/base");
            client.checkExists().inBackground().forPath("/base");

            String      path = queue.poll(10, TimeUnit.SECONDS);
            Assert.assertEquals(path, "/base");

            client.getCuratorListenable().removeListener(listener);

            BackgroundCallback      callback = new BackgroundCallback()
            {
                @Override
                public void processResult(CuratorFramework client, CuratorEvent event) throws Exception
                {
                    queue.put(event.getPath());
                }
            };
            client.getChildren().inBackground(callback).forPath("/base");
            path = queue.poll(10, TimeUnit.SECONDS);
            Assert.assertEquals(path, "/base");
        }
        finally
        {
            client.close();
        }
    }
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    @Test
    public void     testCreateACL() throws Exception
    {
        CuratorFrameworkFactory.Builder builder = CuratorFrameworkFactory.builder();
        CuratorFramework client = builder
            .connectString(server.getConnectString())
            .authorization("digest", "me:pass".getBytes())
            .retryPolicy(new RetryOneTime(1))
            .build();
        client.start();
        try
        {
            ACL acl = new ACL(ZooDefs.Perms.WRITE, ZooDefs.Ids.AUTH_IDS);
            List<ACL> aclList = Lists.newArrayList(acl);
            client.create().withACL(aclList).forPath("/test", "test".getBytes());
            client.close();

            client = builder
                .connectString(server.getConnectString())
                .authorization("digest", "me:pass".getBytes())
                .retryPolicy(new RetryOneTime(1))
                .build();
            client.start();
            try
            {
                client.setData().forPath("/test", "test".getBytes());
            }
            catch ( KeeperException.NoAuthException e )
            {
                Assert.fail("Auth failed");
            }
            client.close();

            client = builder
                .connectString(server.getConnectString())
                .authorization("digest", "something:else".getBytes())
                .retryPolicy(new RetryOneTime(1))
                .build();
            client.start();
            try
            {
                client.setData().forPath("/test", "test".getBytes());
                Assert.fail("Should have failed with auth exception");
            }
            catch ( KeeperException.NoAuthException e )
            {
                // expected
            }
        }
        finally
        {
            client.close();
        }
    }
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    @Test
    public void     testCreateACLWithReset() throws Exception
    {
        Timing timing = new Timing();
        CuratorFrameworkFactory.Builder builder = CuratorFrameworkFactory.builder();
        CuratorFramework client = builder
            .connectString(server.getConnectString())
            .sessionTimeoutMs(timing.session())
            .connectionTimeoutMs(timing.connection())
            .authorization("digest", "me:pass".getBytes())
            .retryPolicy(new RetryOneTime(1))
            .build();
        client.start();
        try
        {
            final CountDownLatch lostLatch = new CountDownLatch(1);
            ConnectionStateListener listener = new ConnectionStateListener()
            {
                @Override
                public void stateChanged(CuratorFramework client, ConnectionState newState)
                {
                    if ( newState == ConnectionState.LOST )
                    {
                        lostLatch.countDown();
                    }
                }
            };
            client.getConnectionStateListenable().addListener(listener);

            ACL acl = new ACL(ZooDefs.Perms.WRITE, ZooDefs.Ids.AUTH_IDS);
            List<ACL> aclList = Lists.newArrayList(acl);
            client.create().withACL(aclList).forPath("/test", "test".getBytes());

            server.stop();
            Assert.assertTrue(timing.awaitLatch(lostLatch));
            try
            {
                client.checkExists().forPath("/");
                Assert.fail("Connection should be down");
            }
            catch ( KeeperException.ConnectionLossException e )
            {
                // expected
            }

            server.restart();
            try
            {
                client.setData().forPath("/test", "test".getBytes());
            }
            catch ( KeeperException.NoAuthException e )
            {
                Assert.fail("Auth failed");
            }
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