Example usage for org.apache.zookeeper WatchedEvent getType

Introduction

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

Prototype

public EventType getType()

Source Link

Usage

From source file:com.nesscomputing.service.discovery.job.ZookeeperProcessingTask.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    LOG.debug("Received '%s' event", event.getState());
    switch (event.getState()) {
    case AuthFailed:
        LOG.warn("Got an auth request from zookeeper. Server config is not compatible to this client!");
        break;//from w ww. j  ava  2s. c  om
    case SyncConnected:
        LOG.trace("Session connected");
        connected = true;

        switch (event.getType()) {
        case None:
            break;
        default:
            LOG.trace("Zookeeper state changed: %s", event.getType());
            // Forces running of the work loop.
            generation.incrementAndGet();
            break;
        }

        break;
    case Disconnected:
        LOG.trace("Session disconnected, waiting for reconnect");
        connected = false;
        break;
    case Expired:
        LOG.trace("Session expired, closing zookeeper.");
        connected = false;
        closeZookeeper();
    default:
        // Huh?
        LOG.debug("Failed to process unknown state %s", event.getState());
        break;
    }
}

From source file:com.netflix.curator.ConnectionState.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    if (LOG_EVENTS) {
        log.debug("ConnectState watcher: " + event);
    }/*from w ww . j a va  2 s . co m*/

    for (Watcher parentWatcher : parentWatchers) {
        TimeTrace timeTrace = new TimeTrace("connection-state-parent-process", tracer.get());
        parentWatcher.process(event);
        timeTrace.commit();
    }

    boolean wasConnected = isConnected.get();
    boolean newIsConnected = wasConnected;
    if (event.getType() == Watcher.Event.EventType.None) {
        newIsConnected = checkState(event.getState(), wasConnected);
    }

    if (newIsConnected != wasConnected) {
        isConnected.set(newIsConnected);
        connectionStartMs = System.currentTimeMillis();
    }
}

From source file:com.netflix.curator.framework.imps.NamespaceWatchedEvent.java

License:Apache License

NamespaceWatchedEvent(CuratorFrameworkImpl client, WatchedEvent event) {
    super(event.getType(), event.getState(), client.unfixForNamespace(event.getPath()));
}

From source file:com.netflix.curator.framework.recipes.leader.LeaderLatch.java

License:Apache License

private void checkForLeadership() throws Exception {
    List<String> sortedChildren = LockInternals.getSortedChildren(client, latchPath, LOCK_NAME, sorter);
    if (sortedChildren.size() == 0) {
        throw new Exception("no children - unexpected state");
    }/* w  w  w.  java  2 s . co m*/

    int ourIndex = sortedChildren.indexOf(ZKPaths.getNodeFromPath(ourPath));
    if (ourIndex == 0) {
        setLeadership(true);
    } else {
        final String ourPathWhenWatched = ourPath; // protected against a lost/suspended connection and an old watcher - I'm not sure if this is possible but it can't hurt
        String watchPath = sortedChildren.get(ourIndex - 1);
        Watcher watcher = new Watcher() {
            @Override
            public void process(WatchedEvent event) {
                if ((event.getType() == Event.EventType.NodeDeleted) && (ourPath != null)
                        && ourPath.equals(ourPathWhenWatched)) {
                    try {
                        checkForLeadership();
                    } catch (Exception ex) {
                        log.error("An error ocurred checking the leadership.", ex);
                    }
                }
            }
        };
        if (client.checkExists().usingWatcher(watcher)
                .forPath(ZKPaths.makePath(latchPath, watchPath)) == null) {
            //the previous Participant may be down, so we need to reevaluate the list 
            //to get the actual previous Participant or get the leadership 
            checkForLeadership();
        }
    }
}

From source file:com.objectdriven.maven.zookeeper.sample.DataMonitor.java

public void process(WatchedEvent event) {
    String path = event.getPath();
    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;/*from   w  w  w.  j a  va2  s . co m*/
            listener.closing(KeeperException.Code.SessionExpired);
            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.oneapm.base.tools.ZookeeperClient.java

/**
 * ??,?//  w  w w  . j  av  a 2s. co  m
 *
 * @param event
 */
@Override
public void process(WatchedEvent event) {
    LOG.info("" + event.getState());
    if (event.getType() == Event.EventType.NodeDataChanged && event.getPath().equals("/ni/caution")) {
        setRules(event.getPath());
    }
    if (event.getType() == Event.EventType.NodeDataChanged && event.getPath().equals("/ni/license")) {
        setLicense(event.getPath());
    }
}

From source file:com.proofpoint.zookeeper.ChildDataWatcher.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    try {/*from w w w . j av  a2s .  c o  m*/
        switch (event.getType()) {
        case NodeChildrenChanged: {
            log.debug("Getting children: %s", path);
            client.usingWatcher(this).inBackground(backgroundKey).getChildren(path);
            break;
        }

        case NodeDataChanged: {
            String child = event.getPath().substring(path.length() + 1);

            log.debug("Getting data: %s", event.getPath());
            client.usingWatcher(this).inBackground(backgroundKey).withContext(child).getData(event.getPath());
            break;
        }
        }
    } catch (Exception e) {
        log.error(e);
        throw new RuntimeException(e);
    }
}

From source file:com.proofpoint.zookeeper.ConnectionState.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    boolean localIsConnected;
    synchronized (this) {
        boolean needsNotify = false;
        if (event.getType() == Watcher.Event.EventType.None) {
            boolean wasConnected = isConnected;
            isConnected = (event.getState() == Event.KeeperState.SyncConnected);
            needsNotify = isConnected && !wasConnected;

            if (event.getState() == Event.KeeperState.Expired) {
                File sessionIdFile = new File(config.getSessionStorePath());
                if (!sessionIdFile.delete()) {
                    log.error("Could not delete session ID file: " + config.getSessionStorePath());
                }/*from  w ww  . j ava  2 s .  c  om*/
                needsNotify = true;
            } else if (event.getState() == Event.KeeperState.Disconnected) {
                needsNotify = true;
            }
        }

        if (needsNotify) {
            if (!isConnected && (zookeeper != null)) {
                try {
                    zookeeper.close();
                } catch (InterruptedException e) {
                    Thread.currentThread().interrupt();
                    log.error(e, "Interrupted trying to close Zookeeper. Ignoring at this level.");
                }
                clear();
            }

            notifyAll();
        }

        localIsConnected = isConnected;
    }

    if (localIsConnected) {
        client.postEvent(new ZookeeperEvent(getTypeFromWatched(event), 0, event.getPath(), null, null, null,
                null, null, null));
    }
}

From source file:com.proofpoint.zookeeper.ConnectionState.java

License:Apache License

private ZookeeperEvent.Type getTypeFromWatched(WatchedEvent event) {
    switch (event.getType()) {
    case None: {/*from  w w  w .  jav a2  s  .c  o  m*/
        return ZookeeperEvent.Type.WATCHED_NONE;
    }

    case NodeCreated: {
        return ZookeeperEvent.Type.WATCHED_NODE_CREATED;
    }

    case NodeDeleted: {
        return ZookeeperEvent.Type.WATCHED_NODE_DELETED;
    }

    case NodeDataChanged: {
        return ZookeeperEvent.Type.WATCHED_NODE_DATA_CHANGED;
    }

    case NodeChildrenChanged: {
        return ZookeeperEvent.Type.WATCHED_NODE_CHILDREN_CHANGED;
    }
    }
    return ZookeeperEvent.Type.WATCHED_NONE;
}

From source file:com.rapleaf.hank.coordinator.zk.ZkRing.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    LOG.debug(event);//  w  w  w .  j av  a  2  s  .  c  om
    switch (event.getType()) {
    case NodeChildrenChanged:
        refreshAndRegister();
    }
}