Example usage for org.apache.zookeeper WatchedEvent getState

List of usage examples for org.apache.zookeeper WatchedEvent getState

  1. HOME
  2. Java
  3. org.apache.zookeeper
  4. org.apache.zookeeper.*
  5. WatchedEvent
  6. getState

Introduction

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

Prototype

public KeeperState getState()

Source Link

Usage

From source file:com.digitgroup.fullstackroad.j2ee.zookeeper.Master.java

License:Apache License

/**
 * This method implements the process method of the
 * Watcher interface. We use it to deal with the
 * different states of a session. //w w w  .  j a  va  2 s .  c o m
 * 
 * @param e new session event to be processed
 */
public void process(WatchedEvent e) {
    LOG.info("Processing event: " + e.toString());
    if (e.getType() == EventType.None) {
        switch (e.getState()) {
        case SyncConnected:
            connected = true;
            break;
        case Disconnected:
            connected = false;
            break;
        case Expired:
            expired = true;
            connected = false;
            LOG.error("Session expiration");
        default:
            break;
        }
    }
}

From source file:com.digitgroup.fullstackroad.j2ee.zookeeper.Worker.java

License:Apache License

/**
 * Deals with session events like connecting
 * and disconnecting./*from w  w  w .  j  av  a 2 s .c o m*/
 * 
 * @param e new event generated
 */
public void process(WatchedEvent e) {
    LOG.info(e.toString() + ", " + hostPort);
    if (e.getType() == EventType.None) {
        switch (e.getState()) {
        case SyncConnected:
            /*
             * Registered with ZooKeeper
             */
            connected = true;
            break;
        case Disconnected:
            connected = false;
            break;
        case Expired:
            expired = true;
            connected = false;
            LOG.error("Session expired");
        default:
            break;
        }
    }
}

From source file:com.dingwang.rpc.register.ServiceDiscovery.java

License:Open Source License

private ZooKeeper connectServer() {
    ZooKeeper zk = null;//w  w w  . j  a  v a 2  s . c o  m
    try {
        zk = new ZooKeeper(registryAddress, Constant.ZK_SESSION_TIMEOUT, new Watcher() {
            @Override
            public void process(WatchedEvent event) {
                if (event.getState() == Event.KeeperState.SyncConnected) {
                    latch.countDown();
                }
            }
        });
        latch.await();
    } catch (IOException | InterruptedException e) {
        LOGGER.error("", e);
    }
    return zk;
}

From source file:com.dinstone.zkclient.core.ZkConnection.java

License:Apache License

public synchronized ZooKeeper getZooKeeper() throws InterruptedException {
    if (this.zooKeeper == null || !zooKeeper.getState().isAlive()) {
        final CountDownLatch connectSingal = new CountDownLatch(1);
        try {//w  w  w  .j av  a 2  s  . co  m
            this.zooKeeper = new ZooKeeper(zkServers, timeout, new Watcher() {

                public void process(WatchedEvent event) {
                    LOG.debug("Received zookeeper event, {}", event.toString());
                    if (event.getPath() == null) {
                        if (KeeperState.SyncConnected == event.getState()) {
                            connectSingal.countDown();
                            fireStateChangedEvent(event.getState());
                        } else if (KeeperState.Disconnected == event.getState()) {
                            fireStateChangedEvent(event.getState());
                        } else if (KeeperState.Expired == event.getState()) {
                            LOG.debug("Session is expired, need to clear process");
                            fireStateChangedEvent(event.getState());
                        }
                    }
                }
            });
        } catch (IOException e) {
            throw new ZkException("connect zookeeper error", e);
        }
        connectSingal.await();
    }

    return this.zooKeeper;
}

From source file:com.dinstone.zkclient.leader.ZookeeperTest.java

License:Apache License

/**
 * @return/*from www.  j a  v  a 2 s . c  o  m*/
 */
private static ZooKeeper getZookeeper() {
    ZooKeeper zooKeeper = null;

    final CountDownLatch connectSingal = new CountDownLatch(1);
    try {
        String quorumServers = "172.21.31.32:2181";
        zooKeeper = new ZooKeeper(quorumServers, 1000, new Watcher() {

            public void process(WatchedEvent event) {
                System.out.println("Received zookeeper event, type={" + event.getType() + "}, state={"
                        + event.getState() + "}, ={" + event.getPath() + "}");

                if (KeeperState.SyncConnected == event.getState()) {
                    connectSingal.countDown();
                } else if (KeeperState.Expired == event.getState()) {
                    System.err.println("Session is expired, need to redo the action");
                }
            }
        });
    } catch (IOException e) {
        e.printStackTrace();
    }

    try {
        connectSingal.await();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }

    return zooKeeper;
}

From source file:com.discovery.darchrow.ZookeeperClientTest.java

License:Open Source License

public static void main(String[] args) throws Exception {
    // ?/*from   w  ww.  ja va2s.c  o m*/
    ZooKeeper zk = new ZooKeeper("localhost:2181", 30000, new Watcher() {
        // ?
        public void process(WatchedEvent event) {
            System.out.println("?:" + event.getState() + ":" + event.getType() + ":" + event.getWrapper()
                    + ":" + event.getPath());
        }
    });
    // ktv???????
    zk.create(ROOT, "root-ktv".getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);

    // ??KTV ,       PERSISTENT_SEQUENTIAL  0000000000 ?
    zk.create(ROOT + "/?KTV", "?KTV".getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE,
            CreateMode.PERSISTENT_SEQUENTIAL);

    // ?,       EPHEMERAL session 
    zk.create(ROOT + "/KTV", "KTV".getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);

    // ???EPHEMERAL_SEQUENTIAL  session ?
    zk.create(ROOT + "/KTV-", "KTV-".getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE,
            CreateMode.EPHEMERAL_SEQUENTIAL);

    // ? ? ktv
    List<String> ktvs = zk.getChildren(ROOT, true);
    System.out.println(Arrays.toString(ktvs.toArray()));
    for (String node : ktvs) {
        // 
        zk.delete(ROOT + "/" + node, -1);
    }
    // ?
    zk.delete(ROOT, -1);
    zk.close();
}

From source file:com.doctor.zookeeper.api.Practice.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    System.out.println("receive WatchedEvent " + event);
    if (KeeperState.SyncConnected == event.getState()) {
        countDownLatch.countDown();/*ww  w  .ja  va2 s . co  m*/
    }

}

From source file:com.dw.zk.ZkSessionPoller.java

License:Apache License

public static void main(String... args) throws Exception {
    org.apache.log4j.Logger rootLogger = org.apache.log4j.Logger.getRootLogger();
    rootLogger.setLevel(Level.INFO);
    rootLogger.addAppender(new ConsoleAppender(new SimpleLayout()));

    final ZooKeeper zk = new ZooKeeper("172.16.84.129:2181", 2000, new Watcher() {
        @Override/*from   w  w  w. j  av a 2  s.c  o  m*/
        public void process(WatchedEvent event) {
            System.out.printf("state=%s\ttype=%s%n", event.getState(), event.getType());
        }
    });

    final CountDownLatch latch = new CountDownLatch(1);

    ZkSessionPoller poller = new ZkSessionPoller(zk, 200, new ConnectionListenerSkeleton() {

        @Override
        public void expired() {
            System.err.println("Session Expired, shutting down.");
            try {
                zk.close();
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
            latch.countDown();
        }
    });

    poller.startPolling();
    latch.await();
    poller.stopPolling();
}

From source file:com.ebay.jetstream.messaging.transport.zookeeper.ZooKeeperTransport.java

License:MIT License

/**
 * Call back receiver method to process notifications on node changes.
 *//*from   www . ja  v  a2s. c om*/
public void process(WatchedEvent event) {
    LOGGER.info("Event State :: " + event.getState().name() + " Event Type:: " + event.getType()
            + " Event path :: " + event.getPath());

    if (m_shutdown.get()) {
        LOGGER.warn("Transport is in Shutdown State.");
        return;
    }

    switch (event.getType()) {

    case NodeChildrenChanged:
        if (m_group != null) {
            boolean isDiscoveryTopic = false;
            for (String nettydiscoverable : m_NettyDiscoverableTopics) {
                if (event.getPath().contains(nettydiscoverable)) {
                    isDiscoveryTopic = true;
                    for (String nettyconextnode : m_nettyContexts) {
                        if (event.getPath().contains(nettyconextnode)) {
                            m_group.registerChildrenCallback(event.getPath());
                            m_group.getChildrenAndSetWatch(event.getPath());
                            break;
                        }
                    }
                }
            }
            if (!isDiscoveryTopic) {
                m_group.registerChildrenCallback(event.getPath());
                m_group.getChildrenAndSetWatch(event.getPath());
            }
        }

        break;

    case NodeCreated:
        if (m_group != null) {
            m_group.registerDataCallBack(event.getPath());
        }
        break;

    case NodeDataChanged:
        if (m_group != null) {
            m_group.registerDataCallBack(event.getPath());
        }
        break;

    case NodeDeleted:
        if (m_group != null) {
            int parentIndex = event.getPath().lastIndexOf('/');
            String parentNode = event.getPath().substring(0, parentIndex);
            m_group.getChildrenAndSetWatch(parentNode);
        }
        break;

    case None:
        break;
    default:
        break;
    }

}

From source file:com.edmunds.zookeeper.election.ZooKeeperElection.java

License:Apache License

private void processCurrentWatcher(ZooKeeperElectionContext ctx, WatchedEvent event) {

    final KeeperState connectionState = event.getState();
    if (connectionState == KeeperState.SyncConnected) {

        // Has someone blown our node away ?
        if (event.getType() == EventType.NodeDeleted) {
            // Withdraw from this election and sign up again.
            if (ctx.isActive()) {
                withdrawAndEnroll(ctx, "Current Node Deleted");
            }/*w ww.j av  a 2s. com*/
        }
    } else {
        error("Connection lost - Primary watch: " + connectionState, Code.CONNECTIONLOSS, "/", ctx);
        withdrawInternal(ctx, "Current Node Connection Lost");
    }
}