Example usage for org.apache.zookeeper WatchedEvent getPath

Introduction

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

Prototype

public String getPath() 

Source Link

Usage

From source file:com.alibaba.jstorm.zk.Zookeeper.java

License:Apache License

/**
 * connect ZK, register Watch/unhandle Watch
 * //  w  w  w  . j  a  v  a2s  .co m
 * @return
 */
public CuratorFramework mkClient(Map conf, List<String> servers, Object port, String root,
        final WatcherCallBack watcher) {

    CuratorFramework fk = Utils.newCurator(conf, servers, port, root);

    fk.getCuratorListenable().addListener(new CuratorListener() {
        @Override
        public void eventReceived(CuratorFramework _fk, CuratorEvent e) throws Exception {
            if (e.getType().equals(CuratorEventType.WATCHED)) {
                WatchedEvent event = e.getWatchedEvent();

                watcher.execute(event.getState(), event.getType(), event.getPath());
            }

        }
    });

    fk.getUnhandledErrorListenable().addListener(new UnhandledErrorListener() {
        @Override
        public void unhandledError(String msg, Throwable error) {
            String errmsg = "Unrecoverable Zookeeper error, halting process: " + msg;
            LOG.error(errmsg, error);
            JStormUtils.halt_process(1, "Unrecoverable Zookeeper error");

        }
    });
    fk.start();
    return fk;
}

---

From source file:com.alibaba.otter.shared.common.utils.zookeeper.ZkClientx.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();//  ww w . j  a v  a 2  s  .c  om
    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.alibaba.otter.shared.common.utils.zookeeper.ZkClientx.java

License:Apache License

private void processDataOrChildChange(WatchedEvent event) {
    final String path = event.getPath();

    if (event.getType() == EventType.NodeChildrenChanged || event.getType() == EventType.NodeCreated
            || event.getType() == EventType.NodeDeleted) {
        Set<IZkChildListener> childListeners = _childListener.get(path);
        if (childListeners != null && !childListeners.isEmpty()) {
            fireChildChangedEvents(path, childListeners);
        }//from  www .ja va  2  s. c o  m
    }

    if (event.getType() == EventType.NodeDataChanged || event.getType() == EventType.NodeDeleted
            || event.getType() == EventType.NodeCreated) {
        Set<IZkDataListener> listeners = _dataListener.get(path);
        if (listeners != null && !listeners.isEmpty()) {
            fireDataChangedEvents(event.getPath(), listeners);
        }
    }
}

---

From source file:com.alibaba.wasp.zookeeper.ZooKeeperWatcher.java

License:Apache License

/**
 * Method called from ZooKeeper for events and connection status.
 * <p>/*from   ww  w  .  ja  va2s. c om*/
 * Valid events are passed along to listeners. Connection status changes are
 * dealt with locally.
 */
@Override
public void process(WatchedEvent event) {
    LOG.debug(prefix("Received ZooKeeper Event, " + "type=" + event.getType() + ", " + "state="
            + event.getState() + ", " + "path=" + event.getPath()));

    switch (event.getType()) {

    // If event type is NONE, this is a connection status change
    case None: {
        connectionEvent(event);
        break;
    }

    // Otherwise pass along to the listeners

    case NodeCreated: {
        for (ZooKeeperListener listener : listeners) {
            listener.nodeCreated(event.getPath());
        }
        break;
    }

    case NodeDeleted: {
        for (ZooKeeperListener listener : listeners) {
            listener.nodeDeleted(event.getPath());
        }
        break;
    }

    case NodeDataChanged: {
        for (ZooKeeperListener listener : listeners) {
            listener.nodeDataChanged(event.getPath());
        }
        break;
    }

    case NodeChildrenChanged: {
        for (ZooKeeperListener listener : listeners) {
            listener.nodeChildrenChanged(event.getPath());
        }
        break;
    }
    }
}

---

From source file:com.amazonaws.services.kinesis.stormspout.state.zookeeper.ZookeeperStateManager.java

License:Open Source License

@Override
public synchronized void process(WatchedEvent event) {
    checkState(active, "Cannot process events if state is not active (a ZK" + " connection is necessary).");

    // Re-hook the watcher.
    // Ordering the statements this way will ensure that no ZK shardList update is missed.
    // Since bootstrapStateFromZookeeper does its own getShardList(null) call, and the
    // call is after the re-hook, then any modification made in between the time the process()
    // function is called and the re-hook is made is captured by bootstrapStateFromZookeeper.
    // Note that this could end up in multiple calls being made for the same shardList update.
    try {/*from ww w.  j ava2 s  .  co  m*/
        zk.watchShardList(this);
    } catch (Exception e) {
        // Failure is fatal for the task (and it's been retried, so it's indicative of a
        // bigger Zookeeper/global state issue).
        LOG.error(this + " failure to re-attach event handler for ZK node " + event.getPath(), e);
        throw new KinesisSpoutException(e);
    }

    // If we are handling a shardList modification, then most probably another task handled
    // a reshard, and we need to sync with the state in ZK.
    if (event.getType() == EventType.NodeDataChanged && zk.isShardList(event.getPath())) {
        LOG.info(this + " detected change in shardList. Committing current shard state and "
                + "reinitializing spout task from ZK.");

        commitShardStates();
        bootstrapStateFromZookeeper();
    }
}

---

From source file:com.anteam.demo.zookeeper.DataMonitor.java

License:Apache License

@SuppressWarnings("deprecation")
public void process(WatchedEvent event) {
    System.out.println("----------------------------------------");
    System.out.println("event:" + event);
    String path = event.getPath();
    System.out.println("DataMonitor.process.path:" + path);
    if (event.getType() == Event.EventType.None) {
        // We are are being told that the state of the
        // connection has changed
        switch (event.getState()) {
        case SyncConnected:
            // In this particular example we don't need to do anything
            // here - watches are automatically re-registered with
            // server and any watches triggered while the client was
            // disconnected will be delivered (in order of course)
            break;
        case Expired:
            // It's all over
            dead = true;/*  w ww .  jav a2  s.c om*/
            listener.closing(KeeperException.Code.SessionExpired);
            break;
        default:
            break;
        }
    } else {
        if (path != null && path.equals(znode)) {
            // Something has changed on the node, let's find out
            zk.exists(znode, true, this, null);
        }
    }
    if (chainedWatcher != null) {
        chainedWatcher.process(event);
    }
}

---

From source file:com.api6.zkclient.watcher.ZKWatcher.java

License:Apache License

/**
 * ?//from www .j a  v a  2 s.  co m
 * @see org.apache.zookeeper.Watcher#process(org.apache.zookeeper.WatchedEvent)
 */
@Override
public void process(WatchedEvent event) {
    LOG.debug("ZooKeeper event is arrived [" + event + " ]...");
    EventType eventType = event.getType();
    //?
    boolean stateChanged = event.getPath() == null;
    //
    boolean znodeChanged = event.getPath() != null;

    //???
    boolean nodeChanged = eventType == EventType.NodeDataChanged || eventType == EventType.NodeDeleted
            || eventType == EventType.NodeCreated;

    //???????????
    boolean childChanged = eventType == EventType.NodeDeleted || eventType == EventType.NodeCreated
            || eventType == EventType.NodeChildrenChanged;

    client.acquireEventLock();
    try {
        if (client.getShutdownTrigger()) {
            LOG.debug("client will shutdown,ignore the event [" + eventType + " | " + event.getPath() + "]");
            return;
        }
        if (stateChanged) {//ZooKeeper???
            process.processStateChanged(event);
        }
        if (nodeChanged) {//??????
            process.processNodeChanged(event);
        }
        if (childChanged) {//??????????
            process.processChildChanged(event);
        }
    } finally {
        if (stateChanged) {
            client.getEventLock().getStateChangedCondition().signalAll();
            // ????watch.
            // ????????
            // ????
            if (event.getState() == KeeperState.Expired) {
                client.getEventLock().getNodeEventCondition().signalAll();
                client.getEventLock().getNodeOrChildChangedCondition().signalAll();

                // ????
                process.processAllNodeAndChildListeners(event);
            }
        }
        if (znodeChanged) {
            client.getEventLock().getNodeEventCondition().signalAll();
        }
        if (nodeChanged || childChanged) {
            client.getEventLock().getNodeOrChildChangedCondition().signalAll();
        }
        client.releaseEventLock();
    }
}

---

From source file:com.api6.zkclient.watcher.ZKWatcherProcess.java

License:Apache License

/**
 * ???//  w  w w  . j  a  v a 2 s . co  m
 * @param event 
 * @return void
 */
public void processChildChanged(final WatchedEvent event) {
    final String path = event.getPath();
    final Set<ZKListener> listeners = client.getChildListenerMap().get(path);
    //????
    submitChildEvent(listeners, path, event.getType());
}

---

From source file:com.api6.zkclient.watcher.ZKWatcherProcess.java

License:Apache License

/**
 * ???// w  ww. ja  v  a  2 s  . co m
 * @param event 
 * @return void
 */
public void processNodeChanged(final WatchedEvent event) {
    final String path = event.getPath();
    final EventType eventType = event.getType();
    final Set<ZKListener> listeners = client.getNodeListenerMap().get(path);
    if (listeners == null || listeners.isEmpty()) {
        return;
    }

    //listenersZKChildDataListener?
    //??????
    //????ZKChildDataListener
    final Set<ZKListener> childDataChangeListners = new CopyOnWriteArraySet<>();
    final Set<ZKListener> nodeListners = new CopyOnWriteArraySet<>();

    classifyListeners(listeners, nodeListners, childDataChangeListners);

    //????
    submitNodeEvent(nodeListners, childDataChangeListners, path, eventType);

    //????
    if (eventType == EventType.NodeDataChanged) {
        //????
        submitChildDataEvent(childDataChangeListners, path, eventType);
    }
}

---

From source file:com.att.nsa.zkUtils.ZkWatcher.java

License:Open Source License

public static Watcher getLoggingWatcher(final String title, final Logger log) {
    return new Watcher() {
        @Override//from   w  w  w  . j  a  v a  2s . co  m
        public void process(WatchedEvent event) {
            log.info("ZK watch for " + title + ": " + event.getType() + " @ " + event.getPath());
        }
    };
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• »