Example usage for org.apache.zookeeper WatchedEvent 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.continuuity.weave.internal.state.ZKServiceDecorator.java

License:Open Source License

private Watcher createConnectionWatcher() {
    final AtomicReference<Watcher.Event.KeeperState> keeperState = new AtomicReference<Watcher.Event.KeeperState>();

    return new Watcher() {
        @Override//w w w  .j a va2s.  c  om
        public void process(WatchedEvent event) {
            // When connected (either first time or reconnected from expiration), creates a ephemeral node
            Event.KeeperState current = event.getState();
            Event.KeeperState previous = keeperState.getAndSet(current);

            LOG.info("Connection state changed " + previous + " => " + current);

            if (current == Event.KeeperState.SyncConnected
                    && (previous == null || previous == Event.KeeperState.Expired)) {
                String liveNode = "/instances/" + id;
                LOG.info("Create live node " + liveNode);

                JsonObject content = new JsonObject();
                content.add("data", liveNodeData.get());
                listenFailure(zkClient.create(liveNode, encodeJson(content), CreateMode.EPHEMERAL));
            }
        }
    };
}

From source file:com.continuuity.weave.internal.zookeeper.KillZKSession.java

License:Apache License

/**
 * Kills a Zookeeper client to simulate failure scenarious during testing.
 * Callee will provide the amount of time to wait before it's considered failure
 * to kill a client.//  ww w .ja  v  a  2  s. c  o  m
 *
 * @param client that needs to be killed.
 * @param connectionString of Quorum
 * @param maxMs time in millisecond specifying the max time to kill a client.
 * @throws IOException When there is IO error
 * @throws InterruptedException When call has been interrupted.
 */
public static void kill(ZooKeeper client, String connectionString, int maxMs)
        throws IOException, InterruptedException {
    final CountDownLatch latch = new CountDownLatch(1);
    ZooKeeper zk = new ZooKeeper(connectionString, maxMs, new Watcher() {
        @Override
        public void process(WatchedEvent event) {
            if (event.getState() == Event.KeeperState.SyncConnected) {
                latch.countDown();
            }
        }
    }, client.getSessionId(), client.getSessionPasswd());

    try {
        Preconditions.checkState(latch.await(maxMs, TimeUnit.MILLISECONDS), "Fail to kill ZK connection.");
    } finally {
        zk.close();
    }
}

From source file:com.continuuity.weave.internal.zookeeper.RewatchOnExpireWatcher.java

License:Open Source License

@Override
public void process(WatchedEvent event) {
    if (delegate != null && event.getType() != Event.EventType.None) {
        try {/* w  ww  .j  a v a 2s .  co  m*/
            delegate.process(event);
        } catch (Throwable t) {
            LOG.error("Watcher throws exception.", t);
        }
    }

    if (event.getState() != Event.KeeperState.Expired) {
        return;
    }
    switch (actionType) {
    case EXISTS:
        exists();
        break;
    case CHILDREN:
        children();
        break;
    case DATA:
        data();
        break;
    }
}

From source file:com.dangdang.config.service.easyzk.ConfigNodeEventListener.java

License:Apache License

@Override
public void eventReceived(CuratorFramework client, CuratorEvent event) throws Exception {
    if (LOGGER.isDebugEnabled()) {
        LOGGER.debug(event.toString());//from   w w w  . j av  a  2  s.c  om
    }

    final WatchedEvent watchedEvent = event.getWatchedEvent();
    if (watchedEvent != null) {

        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug(watchedEvent.toString());
        }

        if (watchedEvent.getState() == KeeperState.SyncConnected) {
            boolean someChange = false;
            switch (watchedEvent.getType()) {
            case NodeChildrenChanged:
                configNode.loadNode(false);
                someChange = true;
                break;
            case NodeDataChanged:
                configNode.loadKey(watchedEvent.getPath());
                someChange = true;
                break;
            default:
                break;
            }

            if (someChange && configNode.getConfigLocalCache() != null) {
                configNode.getConfigLocalCache().saveLocalCache(configNode, configNode.getNode());
            }
        }
    }
}

From source file:com.dangdang.config.service.zookeeper.ConfigNodeEventListener.java

License:Apache License

@Override
public void eventReceived(CuratorFramework client, CuratorEvent event) throws Exception {
    if (LOGGER.isDebugEnabled()) {
        LOGGER.debug(event.toString());//from w w  w .  j a  va  2  s .c  o  m
    }

    final WatchedEvent watchedEvent = event.getWatchedEvent();
    if (watchedEvent != null) {
        LOGGER.debug("Watched event: {}" + watchedEvent);

        if (watchedEvent.getState() == KeeperState.SyncConnected) {
            boolean someChange = false;
            switch (watchedEvent.getType()) {
            case NodeChildrenChanged:
                configNode.loadNode();
                someChange = true;
                break;
            case NodeDataChanged:
                configNode.reloadKey(watchedEvent.getPath());
                someChange = true;
                break;
            default:
                break;
            }

            if (someChange && configNode.getConfigLocalCache() != null) {
                configNode.getConfigLocalCache().saveLocalCache(configNode, configNode.getNode());
            }
        }
    }
}

From source file:com.dangdang.config.service.zookeeper.ZookeeperConfigGroup.java

License:Apache License

/**
 * ?/*  www .ja  v  a  2 s .c o m*/
 */
private void initConfigs() {
    client = CuratorFrameworkFactory.newClient(configProfile.getConnectStr(), configProfile.getRetryPolicy());
    client.start();

    client.getCuratorListenable().addListener(new CuratorListener() {
        @Override
        public void eventReceived(CuratorFramework client, CuratorEvent event) throws Exception {
            LOGGER.info("Event: {}", event);

            final WatchedEvent watchedEvent = event.getWatchedEvent();
            if (watchedEvent != null) {
                LOGGER.debug("Watched event: {}", watchedEvent);

                if (watchedEvent.getState() == Watcher.Event.KeeperState.SyncConnected) {
                    switch (watchedEvent.getType()) {
                    case NodeChildrenChanged:
                        loadNode();
                        break;
                    case NodeDataChanged:
                        reloadKey(watchedEvent.getPath());
                        break;
                    default:
                        break;
                    }
                }
            }
        }
    });

    final CountDownLatch countDownLatch = new CountDownLatch(1);
    client.getConnectionStateListenable().addListener(new ConnectionStateListener() {

        @Override
        public void stateChanged(CuratorFramework client, ConnectionState newState) {
            LOGGER.info("Connection state change: {}", newState);
            if (newState == ConnectionState.CONNECTED) {
                LOGGER.debug("Loading properties for node: {}", node);
                loadNode();
                countDownLatch.countDown();
            } else if (newState == ConnectionState.RECONNECTED) {
                loadNode();
            }
        }
    });

    try {
        countDownLatch.await();
    } catch (InterruptedException e) {
        LOGGER.error(e.getMessage(), e);
        throw new RuntimeException("Config Load error.", e);
    }

    // Update local cache
    if (configLocalCache != null) {
        configLocalCache.saveLocalCache(this, node);
    }
}

From source file:com.datis.zookafka.client.Creator.java

@Override
public void process(WatchedEvent e) {
    LOG.info("Processing event: " + e.toString());
    if (e.getType() == Event.EventType.None) {
        switch (e.getState()) {
        case SyncConnected:
            System.out.println("Event SynConnected");
            connected = true;//from  w ww . j  a  v a2  s. com
            break;
        case Disconnected:
            System.out.println("Event Disconnected");
            connected = false;
            break;
        case Expired:
            System.out.println("Event Expired");
            expired = true;
            connected = false;
            LOG.error("Session expiration");
        default:
            break;
        }
    }
}

From source file:com.demo.master_work.Client.java

License:Apache License

public void process(WatchedEvent e) {
    System.out.println(e);/*from   w  ww .  ja  va2s  .  co  m*/
    if (e.getType() == Event.EventType.None) {
        switch (e.getState()) {
        case SyncConnected:
            connected = true;
            break;
        case Disconnected:
            connected = false;
            break;
        case Expired:
            expired = true;
            connected = false;
            System.out.println("Exiting due to session expiration");
        default:
            break;
        }
    }
}

From source file:com.dianping.lion.client.zookeeper.SessionRecoverableZookeeper.java

License:Open Source License

@Override
public void process(WatchedEvent event) {
    if (event.getType() == Event.EventType.None && event.getState() == KeeperState.Expired) {
        try {/*from  w w  w.  j  av a  2s .c  o  m*/
            reconnectToZookeeper(this.zookeeper);
        } catch (Exception e) {
            logger.warn("Reconnect to zookeeper cluster failed while session expired.", e);
        }
    }
    if (this.watcher != null) {
        this.watcher.process(event);
    }
}

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

License:Apache License

public void process(WatchedEvent e) {
    System.out.println(e);/*from ww  w. java  2s.c o  m*/
    if (e.getType() == EventType.None) {
        switch (e.getState()) {
        case SyncConnected:
            connected = true;
            break;
        case Disconnected:
            connected = false;
            break;
        case Expired:
            expired = true;
            connected = false;
            System.out.println("Exiting due to session expiration");
        default:
            break;
        }
    }
}