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.twitter.finagle.common.zookeeper.ZooKeeperClient.java

License:Apache License

/**
 * Clients that need to re-establish state after session expiration can register an
 * {@code onExpired} command to execute.
 *
 * @param onExpired the {@code Runnable} to register
 * @return the new {@link Watcher} which can later be passed to {@link #unregister} for
 *     removal.//ww w  .j  a  va 2  s .com
 */
public Watcher registerExpirationHandler(final Runnable onExpired) {
    Watcher watcher = new Watcher() {
        @Override
        public void process(WatchedEvent event) {
            if (event.getType() == EventType.None && event.getState() == KeeperState.Expired) {
                onExpired.run();
            }
        }
    };
    register(watcher);
    return watcher;
}

From source file:com.yahoo.pulsar.zookeeper.GlobalZooKeeperCache.java

License:Apache License

@Override
public <T> void process(WatchedEvent event, final CacheUpdater<T> updater) {
    synchronized (this) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("[{}] Got Global ZooKeeper WatchdEvent: EventType: {}, KeeperState: {}, path: {}",
                    this.hashCode(), event.getType(), event.getState(), event.getPath());
        }//  www .j a v  a2s.co  m
        if (event.getType() == Event.EventType.None) {
            switch (event.getState()) {
            case Expired:
                // in case of expired, the zkSession is no longer good for sure.
                // We need to restart the session immediately.
                // cancel any timer event since it is already bad
                ZooKeeper oldSession = this.zkSession.getAndSet(null);
                LOG.warn("Global ZK session lost. Triggering reconnection {}", oldSession);
                safeCloseZkSession(oldSession);
                asyncRestartZooKeeperSession();
                return;
            case SyncConnected:
            case ConnectedReadOnly:
                checkNotNull(zkSession.get());
                LOG.info("Global ZK session {} restored connection.", zkSession.get());

                //
                dataCache.synchronous().invalidateAll();
                childrenCache.invalidateAll();
                return;
            default:
                break;
            }
        }
    }

    // Other types of events
    super.process(event, updater);

}

From source file:com.yahoo.pulsar.zookeeper.LocalZooKeeperCache.java

License:Apache License

@Override
public <T> void process(WatchedEvent event, final CacheUpdater<T> updater) {
    if (LOG.isDebugEnabled()) {
        LOG.debug("Got Local ZooKeeper WatchedEvent: EventType: {}, KeeperState: {}, Path: {}", event.getType(),
                event.getState(), event.getPath());
    }//from www  .j a  va  2s. c  o  m
    if (event.getType() == Event.EventType.None) {
        switch (event.getState()) {
        case Expired:
            // in case of expired, the zkSession is no longer good
            LOG.warn("Lost connection from local ZK. Invalidating the whole cache.");
            dataCache.synchronous().invalidateAll();
            childrenCache.invalidateAll();
            return;
        default:
            break;
        }
    }
    super.process(event, updater);
}

From source file:com.yahoo.pulsar.zookeeper.ZooKeeperSessionWatcher.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    Watcher.Event.EventType eventType = event.getType();
    Watcher.Event.KeeperState eventState = event.getState();

    LOG.info("Received zookeeper notification, eventType={}, eventState={}", eventType, eventState);

    switch (eventType) {
    case None:/* ww  w .j  av  a  2 s. c  om*/
        if (eventState == Watcher.Event.KeeperState.Expired) {
            LOG.error("ZooKeeper session already expired, invoking shutdown");
            close();
            shuttingDown = true;
            shutdownService.shutdown(-1);
        }
        break;
    default:
        break;
    }

}

From source file:com.yihaodian.architecture.zkclient.ZkClient.java

License:Apache License

public void process(WatchedEvent event) {
    LOG.debug("Received event: " + event);
    _zookeeperEventThread = Thread.currentThread();

    boolean stateChanged = event.getPath() == null;
    boolean znodeChanged = event.getPath() != null;
    boolean dataChanged = event.getType() == EventType.NodeDataChanged
            || event.getType() == EventType.NodeDeleted || event.getType() == EventType.NodeCreated
            || event.getType() == EventType.NodeChildrenChanged;

    getEventLock().lock();/*from w ww. j a  v  a 2 s  .co  m*/
    try {

        // We might have to install child change event listener if a new
        // node was created
        if (getShutdownTrigger()) {
            LOG.debug("ignoring event '{" + event.getType() + " | " + event.getPath()
                    + "}' since shutdown triggered");
            return;
        }
        if (stateChanged) {
            processStateChanged(event);
        }
        if (dataChanged) {
            processDataOrChildChange(event);
        }
    } finally {
        if (stateChanged) {
            getEventLock().getStateChangedCondition().signalAll();

            // If the session expired we have to signal all conditions,
            // because watches might have been removed and
            // there is no guarantee that those
            // conditions will be signaled at all after an Expired event
            // TODO PVo write a test for this
            if (event.getState() == KeeperState.Expired) {
                getEventLock().getZNodeEventCondition().signalAll();
                getEventLock().getDataChangedCondition().signalAll();
                // We also have to notify all listeners that something might
                // have changed
                fireAllEvents();
            }
        }
        if (znodeChanged) {
            getEventLock().getZNodeEventCondition().signalAll();
        }
        if (dataChanged) {
            getEventLock().getDataChangedCondition().signalAll();
        }
        getEventLock().unlock();
        LOG.debug("Leaving process event");
    }
}

From source file:com.zookeeper.web.inspector.manager.ZooInspectorManagerImpl.java

License:Apache License

@Override
public boolean connect(Properties connectionProps) {
    connected = false;//  w w  w . j  a va2s. co m
    try {
        if (this.zooKeeper == null) {
            String connectString = connectionProps.getProperty(CONNECT_STRING);
            String sessionTimeout = connectionProps.getProperty(SESSION_TIMEOUT);
            String encryptionManager = connectionProps.getProperty(DATA_ENCRYPTION_MANAGER);
            if (connectString == null || sessionTimeout == null) {
                throw new IllegalArgumentException("Both connect string and session timeout are required.");
            }
            if (encryptionManager == null) {
                this.encryptionManager = new BasicDataEncryptionManager();
            } else {
                Class<?> clazz = Class.forName(encryptionManager);

                if (Arrays.asList(clazz.getInterfaces()).contains(DataEncryptionManager.class)) {
                    this.encryptionManager = (DataEncryptionManager) Class.forName(encryptionManager)
                            .newInstance();
                } else {
                    throw new IllegalArgumentException(
                            "Data encryption manager must implement DataEncryptionManager interface");
                }
            }
            this.connectString = connectString;
            this.sessionTimeout = Integer.valueOf(sessionTimeout);

            //        long start = System.currentTimeMillis();
            //        System.out.println("[START] connecting...");
            this.zooKeeper = new ZooKeeperRetry(connectString, Integer.valueOf(sessionTimeout), new Watcher() {

                @Override
                public void process(WatchedEvent event) {
                    if (event.getState() == KeeperState.Expired) {
                        connected = false;
                    }
                }
            });
            ((ZooKeeperRetry) this.zooKeeper).setRetryLimit(10);
            //        System.out.println("[START] connected took: " + (System.currentTimeMillis() - start));

            connected = ((ZooKeeperRetry) this.zooKeeper).testConnection();
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    // connected = false;

    // do initial cache refresh on all childs of "/"
    if (connected == true) {
        cache = new ZooInspectorManagerCache(this);
        try {
            cache.refresh(Arrays.asList("/"), 1);
        } catch (KeeperException e) {
            // TODO Auto-generated catch block
            disconnect();
            e.printStackTrace();
        }
    } else {
        disconnect();
    }

    return connected;
}

From source file:common.CountdownWatcher.java

License:Apache License

public synchronized void process(WatchedEvent event) {
    LOG.info("Watcher " + name + " got event " + event);

    state = event.getState();
    if (state == KeeperState.SyncConnected) {
        connected = true;//from w  ww.ja v  a2 s  . c o m
        clientConnected.countDown();
    } else {
        connected = false;
    }
    notifyAll();
}

From source file:crunch.MaxTemperature.java

License:Apache License

@Override
    public void process(WatchedEvent event) {
        if (event.getState() == KeeperState.SyncConnected) {
            connectedSignal.countDown();
        }//from  w  ww . ja  v  a2  s .  co m
    }

From source file:crunch.MaxTemperature.java

License:Apache License

@Override
    public void process(WatchedEvent event) { // Watcher interface
        if (event.getState() == KeeperState.SyncConnected) {
            connectedSignal.countDown();
        }//  ww w  . j a  va  2s . co  m
    }

From source file:dsync.synchronization.impl.zk.SessionManager.java

License:Apache License

public void process(WatchedEvent watchedEvent) {
    if (watchedEvent.getType() == Event.EventType.None) {
        switch (watchedEvent.getState()) {
        case Disconnected:
        case Expired:
            revocate();//from  ww w.j  a  va  2 s  .c  o m
        }
    }

}