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:org.eclipse.ecf.provider.zookeeper.node.internal.NodeReader.java

License:Open Source License

public void process(WatchedEvent event) {

    if (this.isDisposed) {
        // Already disposed
        return;//from  w w  w . ja v a 2  s  . c o  m
    }
    if (event.getState() == KeeperState.Disconnected || event.getState() == KeeperState.Expired
            || event.getType() == EventType.NodeDeleted) {
        /*
         * This node is deleted or the connection with the server we're
         * reading from is down. This discovered service wrapped by this
         * node is no more available.
         */
        dispose();
    }

}

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From source file:org.eclipse.ecf.provider.zookeeper.node.internal.ReadRoot.java

License:Open Source License

public void process(final WatchedEvent event) {
    ZooDiscoveryContainer.CACHED_THREAD_POOL.execute(new Runnable() {
        public void run() {
            synchronized (connectionLock) {
                if (watchManager.isDisposed())
                    return;

                switch (event.getState()) {
                case Disconnected:
                    ReadRoot.this.isConnected = false;
                    connect();/* w ww  . j  ava  2s . c om*/
                    break;
                case Expired:
                    ReadRoot.this.isConnected = false;
                    connect();
                    break;
                case SyncConnected:
                    if (!ReadRoot.this.isConnected) {
                        ReadRoot.this.isConnected = true;
                        ReadRoot.this.watchManager.addZooKeeper(ReadRoot.this.readKeeper);
                        ReadRoot.this.readKeeper.exists(INode.ROOT, ReadRoot.this, null, null);
                        ReadRoot.this.readKeeper.getChildren(INode.ROOT, ReadRoot.this, ReadRoot.this, null);
                    }
                    break;

                // ignore @deprecated cases
                }
                switch (event.getType()) {
                case NodeDeleted:
                    if (event.getPath() == null || event.getPath().equals(INode.ROOT))
                        break;
                    ReadRoot.this.nodeReaders.remove(event.getPath());
                    break;
                case NodeChildrenChanged:
                    if (ReadRoot.this.isConnected) {
                        ReadRoot.this.readKeeper.exists(INode.ROOT, ReadRoot.this, null, null);
                        ReadRoot.this.readKeeper.getChildren(INode.ROOT, ReadRoot.this, ReadRoot.this, null);
                    }
                    break;
                }
            }
        }
    });
}

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From source file:org.eclipse.ecf.provider.zookeeper.node.internal.WriteRoot.java

License:Open Source License

@SuppressWarnings({ "incomplete-switch" })
public void process(final WatchedEvent event) {
    ZooDiscoveryContainer.CACHED_THREAD_POOL.execute(new Runnable() {
        public void run() {
            synchronized (connectionLock) {
                switch (event.getState()) {
                case Disconnected:
                    isConnected = false;
                    watchManager.unpublishAll();
                    connect();/*from   ww w.j  ava 2 s  .c o m*/
                    break;
                case Expired:
                    isConnected = false;
                    watchManager.unpublishAll();
                    connect();
                    break;
                case SyncConnected:
                    if (!isConnected) {
                        isConnected = true;
                        watchManager.addZooKeeper(writeKeeper);
                        watchManager.republishAll();
                    }
                    break;
                // ignore @deprecated cases
                }
            }
        }
    });
}

---

From source file:org.eclipse.gyrex.cloud.internal.admin.NodeConfigurer.java

License:Open Source License

@Override
public IStatus configureConnection(final String connectString) {
    ZooKeeper zk = null;//  ww  w. j a v  a2s  . c om
    try {
        if (connectString != null) {
            // try connect
            // TODO: not sure if this makes sense when configuring a remote system
            final CountDownLatch connected = new CountDownLatch(1);
            zk = new ZooKeeper(connectString, 5000, new Watcher() {

                @Override
                public void process(final WatchedEvent event) {
                    if ((event.getType() == EventType.None)
                            && (event.getState() == KeeperState.SyncConnected)) {
                        connected.countDown();
                    }
                }
            });

            // wait at most 5 seconds for a connection
            connected.await(5000, TimeUnit.MILLISECONDS);

            if (zk.getState() != States.CONNECTED) {
                throw new IllegalStateException(String.format(
                        "Timeout waiting for a connection to '%s'. Please verify the connect string.",
                        connectString));
            }

            // try reading some information from the cloud
            if (null == zk.exists(IZooKeeperLayout.PATH_GYREX_ROOT.toString(), false)) {
                // maybe a new cloud, try initialization
                final String path = IZooKeeperLayout.PATH_GYREX_ROOT.toString();
                final String createdPath = zk.create(path, null, ZooDefs.Ids.OPEN_ACL_UNSAFE,
                        CreateMode.PERSISTENT);
                if (!path.equals(createdPath)) {
                    throw new IllegalStateException(String
                            .format("created path does not match expected path (%s != %s)", path, createdPath));
                }
            }

            // at this point the connect string seems to be ok
            // TODO: store it in ZooKeeper and implement ZK to local sync
        }

        // store in instance preferences if local
        if (new NodeInfo().getNodeId().equals(nodeId)) {
            final Preferences preferences = InstanceScope.INSTANCE.getNode(CloudActivator.SYMBOLIC_NAME)
                    .node(ZooKeeperGateConfig.PREF_NODE_ZOOKEEPER);
            if (connectString != null) {
                preferences.put(ZooKeeperGateConfig.PREF_KEY_CLIENT_CONNECT_STRING, connectString);
            } else {
                preferences.remove(ZooKeeperGateConfig.PREF_KEY_CLIENT_CONNECT_STRING);
            }
            preferences.flush();

            // remove connection to cloud
            CloudState.unregisterNode();

            // bring down ZooKeeper Gate
            ZooKeeperGateApplication.reconnect();

            // register with new cloud
            CloudState.registerNode();
        }
    } catch (final Exception e) {
        LOG.debug("Exception connecting to cloud using connect string {}.", connectString, e);
        return new Status(IStatus.ERROR, CloudActivator.SYMBOLIC_NAME,
                "Unable to connect to ZooKeeper. " + ExceptionUtils.getRootCauseMessage(e), e);
    } finally {
        if (zk != null) {
            try {
                zk.close();
            } catch (final InterruptedException e) {
                Thread.currentThread().interrupt();
            }
        }
    }

    return Status.OK_STATUS;
}

---

From source file:org.fusesource.ide.zk.zookeeper.data.ZooKeeperConnection.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    KeeperState state = event.getState();

    if (state == KeeperState.SyncConnected) {
        ZooKeeperConnectionDescriptor zooKeeperConnectionDescriptor = getDescriptor();
        List<AuthInfo> authInfos = zooKeeperConnectionDescriptor.getAuthInfos();
        if (authInfos != null && !authInfos.isEmpty()) {

            for (AuthInfo authInfo : authInfos) {
                String scheme = authInfo.getScheme();
                byte[] auth;

                try {
                    auth = authInfo.getAuth();
                } catch (IOException e) {
                    e.printStackTrace();
                    continue;
                }//from   www . j av  a 2  s  .c  o  m

                // TODO: Is the lack of thread saftey of this method a concern here?
                addAuthInfo(scheme, auth);
            }
        }
    }

    fireConnectionStateChanged();
}

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From source file:org.fusesource.meshkeeper.distribution.registry.zk.ZooKeeperRegistry.java

License:Open Source License

public void start() throws Exception {
    synchronized (this) {
        if (zk == null) {
            //ZK doesn't like schemes, so just take host and port
            URI uri = new URI(connectUrl);

            zk = new ZooKeeper(uri.getHost() + ":" + uri.getPort(), sessionTimeout, new Watcher() {
                public void process(WatchedEvent event) {
                    switch (event.getState()) {
                    case SyncConnected:
                        connected.countDown();
                        break;

                    }//  ww w. j a v  a  2 s .  co m
                }
            });
            zk.addAuthInfo("digest", (userid + ":" + password).getBytes());

        }
    }

    // Wait for the client to establish a connection.
    if (connectTimeout > 0) {
        if (!connected.await(connectTimeout, TimeUnit.MILLISECONDS)) {
            throw new IOException("Failed to connect to ZooKeeper at " + connectUrl + " within "
                    + connectTimeout + " milliseconds.");
        }
    } else {
        connected.await();
    }
}

---

From source file:org.glassfish.grizzly.memcached.zookeeper.ZKClient.java

License:Open Source License

private boolean processStateChanged(final WatchedEvent event) {
    if (event == null) {
        throw new IllegalArgumentException("event must not be null");
    }/*from  w  w w .  j  ava  2s .c o m*/
    final Watcher.Event.KeeperState eventState = event.getState();
    final String eventPath = event.getPath();
    final boolean isStateChangedEvent;
    // state changed
    if (eventPath == null) {
        lock.lock();
        try {
            currentState = eventState;
            lockCondition.signalAll();
        } finally {
            lock.unlock();
        }
        isStateChangedEvent = true;
    } else {
        isStateChangedEvent = false;
    }
    if (eventState == Watcher.Event.KeeperState.Expired) {
        try {
            reconnect();
        } catch (Exception e) {
            if (logger.isLoggable(Level.SEVERE)) {
                logger.log(Level.SEVERE, "failed to reconnect the zookeeper server", e);
            }
        }
    }
    return isStateChangedEvent;
}

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From source file:org.goldenorb.zookeeper.ConnectWatcher.java

License:Apache License

/**
 * This method executes its content given a Watcher event.
 * /* w w  w . j  av a 2s. c om*/
 * @param event
 *          - WatchedEvent
 */
public void process(WatchedEvent event) {
    if (event.getState() == KeeperState.SyncConnected) {
        connectedSignal.countDown();
    }
}

---

From source file:org.hummer.config.WatcherAdapter.java

License:Apache License

public void process(WatchedEvent event) {
    WatchEvent evt = new WatchEvent();
    evt.setState(event.getState().getIntValue());
    evt.setType(event.getType().getIntValue());
    evt.setArg(event.getPath());/*from  w w  w .ja v  a  2 s  .  c o m*/
    innerWatcher.onEvent(evt);
}

---

From source file:org.inria.myriads.snoozenode.groupmanager.leadelection.api.impl.ZooKeeperLeaderElection.java

License:Open Source License

/**
 * Processes the watcher event.//from   w  w w. j ava  2 s.c o m
 * 
 * @param event     The watched event
 */
public void process(WatchedEvent event) {
    Guard.check(event);
    log_.debug("Processing the watch event");

    KeeperState state = event.getState();
    try {
        switch (state) {
        case Disconnected:
            log_.debug("Received disconnected event!");
            initializeZooKeeper();
            break;

        case Expired:
            log_.debug("Received expired event!");
            initializeZooKeeper();
            break;

        case SyncConnected:
            log_.debug("Connection estabilished!");
            break;

        default:
            log_.debug(String.format("Unknown keeper state received: %s", state));
        }
    } catch (Exception exception) {
        log_.debug("Exception during zookeeper initialization", exception);
    }
}

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