Example usage for org.apache.zookeeper Watcher Watcher

Introduction

In this page you can find the example usage for org.apache.zookeeper Watcher Watcher.

Prototype

Watcher

Source Link

Usage

From source file:com.linkedin.helix.AppTest.java

License:Apache License

@Test(enabled = false)
private static void testChroot() throws Exception {
    Watcher watcher = new Watcher() {
        @Override// w  w  w .j  a  v a  2  s.  c o m
        public void process(WatchedEvent event) {
            System.out.println("Event:" + event);
        }
    };
    ZooKeeper zk = new ZooKeeper("localhost:2181/foo", 6000, watcher);
    // uncommenting this line will not cause infinite connect/disconnect
    // zk.create("/", new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);

    zk.exists("/", true);
    System.out.println("Stop the server and restart it when you see this message");
    Thread.currentThread().join();
}

From source file:com.linkedin.helix.TestZkClientWrapper.java

License:Apache License

@Test()
void testSessioExpire() {
    IZkStateListener listener = new IZkStateListener() {

        @Override//from   w ww  . j  av  a2 s. c  om
        public void handleStateChanged(KeeperState state) throws Exception {
            System.out.println("In Old connection New state " + state);
        }

        @Override
        public void handleNewSession() throws Exception {
            System.out.println("In Old connection New session");
        }
    };
    _zkClient.subscribeStateChanges(listener);
    ZkConnection connection = ((ZkConnection) _zkClient.getConnection());
    ZooKeeper zookeeper = connection.getZookeeper();
    System.out.println("old sessionId= " + zookeeper.getSessionId());
    try {
        Watcher watcher = new Watcher() {
            @Override
            public void process(WatchedEvent event) {
                System.out.println("In New connection In process event:" + event);
            }
        };
        ZooKeeper newZookeeper = new ZooKeeper(connection.getServers(), zookeeper.getSessionTimeout(), watcher,
                zookeeper.getSessionId(), zookeeper.getSessionPasswd());
        Thread.sleep(3000);
        System.out.println("New sessionId= " + newZookeeper.getSessionId());
        Thread.sleep(3000);
        newZookeeper.close();
        Thread.sleep(10000);
        connection = ((ZkConnection) _zkClient.getConnection());
        zookeeper = connection.getZookeeper();
        System.out.println("After session expiry sessionId= " + zookeeper.getSessionId());
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

From source file:com.linkedin.helix.ZkUnitTestBase.java

License:Apache License

protected void simulateSessionExpiry(ZkConnection zkConnection) throws IOException, InterruptedException {
    ZooKeeper oldZookeeper = zkConnection.getZookeeper();
    LOG.info("Old sessionId = " + oldZookeeper.getSessionId());

    Watcher watcher = new Watcher() {
        @Override//  w w  w  .  jav a 2s .  c om
        public void process(WatchedEvent event) {
            LOG.info("In New connection, process event:" + event);
        }
    };

    ZooKeeper newZookeeper = new ZooKeeper(zkConnection.getServers(), oldZookeeper.getSessionTimeout(), watcher,
            oldZookeeper.getSessionId(), oldZookeeper.getSessionPasswd());
    LOG.info("New sessionId = " + newZookeeper.getSessionId());
    // Thread.sleep(3000);
    newZookeeper.close();
    Thread.sleep(10000);
    oldZookeeper = zkConnection.getZookeeper();
    LOG.info("After session expiry sessionId = " + oldZookeeper.getSessionId());
}

From source file:com.linkedin.helix.ZkUnitTestBase.java

License:Apache License

protected void simulateSessionExpiry(ZkClient zkClient) throws IOException, InterruptedException {
    IZkStateListener listener = new IZkStateListener() {
        @Override//from   w  w w  .  j ava2s . c o m
        public void handleStateChanged(KeeperState state) throws Exception {
            LOG.info("In Old connection, state changed:" + state);
        }

        @Override
        public void handleNewSession() throws Exception {
            LOG.info("In Old connection, new session");
        }
    };
    zkClient.subscribeStateChanges(listener);
    ZkConnection connection = ((ZkConnection) zkClient.getConnection());
    ZooKeeper oldZookeeper = connection.getZookeeper();
    LOG.info("Old sessionId = " + oldZookeeper.getSessionId());

    Watcher watcher = new Watcher() {
        @Override
        public void process(WatchedEvent event) {
            LOG.info("In New connection, process event:" + event);
        }
    };

    ZooKeeper newZookeeper = new ZooKeeper(connection.getServers(), oldZookeeper.getSessionTimeout(), watcher,
            oldZookeeper.getSessionId(), oldZookeeper.getSessionPasswd());
    LOG.info("New sessionId = " + newZookeeper.getSessionId());
    // Thread.sleep(3000);
    newZookeeper.close();
    Thread.sleep(10000);
    connection = (ZkConnection) zkClient.getConnection();
    oldZookeeper = connection.getZookeeper();
    LOG.info("After session expiry sessionId = " + oldZookeeper.getSessionId());
}

From source file:com.liveramp.hank.test.ZkTestCase.java

License:Apache License

@Before
public final void setUpZk() throws Exception {

    setupZkServer();/*from   w ww.ja  v a  2s. com*/

    final Object lock = new Object();
    final AtomicBoolean connected = new AtomicBoolean(false);

    zk = new ZooKeeperPlus("127.0.0.1:" + zkClientPort, 1000000, new Watcher() {
        @Override
        public void process(WatchedEvent event) {
            switch (event.getType()) {
            case None:
                if (event.getState() == KeeperState.SyncConnected) {
                    connected.set(true);
                    synchronized (lock) {
                        lock.notifyAll();
                    }
                }
            }
            LOG.debug(event.toString());
        }
    });

    synchronized (lock) {
        lock.wait(2000);
    }
    if (!connected.get()) {
        fail("timed out waiting for the zk client connection to come online!");
    }
    LOG.debug("session timeout: " + zk.getSessionTimeout());

    zk.deleteNodeRecursively(zkRoot);
    WaitUntil.orDie(() -> {
        try {
            return zk.exists(zkRoot, false) == null;
        } catch (KeeperException | InterruptedException e) {
            throw new RuntimeException(e);
        }
    });
    createNodeRecursively(zkRoot);
}

From source file:com.martin.zkedit.utils.ZKConnHelper.java

License:Open Source License

public ZooKeeper connect(String hosts, int sessionTimeout) throws IOException, InterruptedException {
    final CountDownLatch connectedSignal = new CountDownLatch(1);
    ZooKeeper zk = new ZooKeeper(hosts, sessionTimeout, new Watcher() {
        @Override/*  w w w .ja v a 2  s .  com*/
        public void process(WatchedEvent event) {
            if (event.getState() == Watcher.Event.KeeperState.SyncConnected) {
                connectedSignal.countDown();
            }
        }
    });
    connectedSignal.await();
    return zk;
}

From source file:com.navercorp.client.Client.java

License:Apache License

public Client(String connectionString, int timeoutms) throws IOException, InterruptedException {
    final CountDownLatch sync = new CountDownLatch(1);
    zk = new ZooKeeper(connectionString, timeoutms, new Watcher() {
        public void process(WatchedEvent event) {
            if (event.getType() == Event.EventType.None
                    && event.getState() == Event.KeeperState.SyncConnected) {
                sync.countDown();/*w  ww. ja  va 2s  .  c  om*/
            }
        }
    });

    if (sync.await(timeoutms, TimeUnit.MILLISECONDS) == false) {
        zk.close();
        throw new IOException("Connection to zookeeper timed out. connectionString: " + connectionString);
    }
}

From source file:com.navercorp.pinpoint.common.server.cluster.zookeeper.CuratorZookeeperClientTest.java

License:Apache License

private ZooKeeper createZookeeper() throws IOException {
    ZooKeeper zooKeeper = new ZooKeeper(ts.getConnectString(), 3000, new Watcher() {
        @Override// w  w w . j a  va 2  s.c  om
        public void process(WatchedEvent watchedEvent) {
            LOGGER.info("ZooKeeper process:{}", watchedEvent);
        }
    });

    return zooKeeper;
}

From source file:com.nearinfinity.blur.manager.clusterstatus.ZookeeperClusterStatus.java

License:Apache License

public ZookeeperClusterStatus(String connectionStr) throws IOException {
    this(new ZooKeeper(connectionStr, 30000, new Watcher() {
        @Override/*from   w  w w . j  a v  a 2  s .co  m*/
        public void process(WatchedEvent event) {

        }
    }));
}

From source file:com.nearinfinity.blur.manager.indexserver.BlurServerShutDown.java

License:Apache License

public void register(final BlurShutdown shutdown, ZooKeeper zooKeeper) {
    this.shutdown = shutdown;
    this.zooKeeper = zooKeeper;
    zooKeeper.register(new Watcher() {
        @Override//www .ja v a2  s.  c  o m
        public void process(WatchedEvent event) {
            KeeperState state = event.getState();
            if (state == KeeperState.Expired) {
                LOG.fatal("Zookeeper session has [" + state + "] server process shutting down.");
                shutdown.shutdown();
            }
        }
    });
}