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.liveramp.hank.zookeeper.ZooKeeperConnection.java

License:Apache License

/**
 * Listens for notifications from the ZooKeeper service telling that we have
 * been connected, disconnected, or our session has expired.
 * <p/>//from   w  w w .jav a 2s.  c  o  m
 * Upon connection, we first make a call to {@link #onConnect()}, and then we
 * release all threads that are blocking on {@link #waitForConnection()}.
 * <p/>
 * Upon disconnection, we call {@link #onDisconnect()}, and then we reset the
 * latch to block any threads that call {@link #waitForConnection()}.
 * <p/>
 * On session expiry, we call {@link #onSessionExpire()}, reset the latch, and
 * then manually try to reconnect to the ZooKeeper service.
 *
 * @param event
 */
@Override
public void process(WatchedEvent event) {
    if (event.getType() == Event.EventType.None) {
        KeeperState state = event.getState();
        LOG.info("Getting event: " + state);

        for (Coordinator.StateChangeListener listener : listeners) {
            listener.process(state.name());
        }

        switch (state) {
        case SyncConnected:
            onConnect();
            connectedSignal.countDown();
            break;
        case Disconnected:
            onDisconnect();
            connectedSignal = new CountDownLatch(1);
            break;
        case Expired:
            onSessionExpire();
            connectedSignal = new CountDownLatch(1);
            try {
                LOG.info("Attempting ZooKeeper reconnect");
                connect(maxConnectAttempts);
            } catch (IOException e) {
                LOG.error("Failed to connect to the ZooKeeper service", e);
                throw new RuntimeException("Couldn't connect to the ZooKeeper service", e);
            }
            break;
        }
        // Return because we are done processing this event; do not let subclasses
        // process.
        return;
    }
}

From source file:com.martin.zkedit.utils.ZKConnHelper.java

License:Open Source License

public ZooKeeper connect(String hosts, int sessionTimeout) throws IOException, InterruptedException {
    final CountDownLatch connectedSignal = new CountDownLatch(1);
    ZooKeeper zk = new ZooKeeper(hosts, sessionTimeout, new Watcher() {
        @Override/* w w  w .  j ava  2s.  co m*/
        public void process(WatchedEvent event) {
            if (event.getState() == Watcher.Event.KeeperState.SyncConnected) {
                connectedSignal.countDown();
            }
        }
    });
    connectedSignal.await();
    return zk;
}

From source file:com.navercorp.client.Client.java

License:Apache License

public Client(String connectionString, int timeoutms) throws IOException, InterruptedException {
    final CountDownLatch sync = new CountDownLatch(1);
    zk = new ZooKeeper(connectionString, timeoutms, new Watcher() {
        public void process(WatchedEvent event) {
            if (event.getType() == Event.EventType.None
                    && event.getState() == Event.KeeperState.SyncConnected) {
                sync.countDown();//from www . j a v  a 2s.c o  m
            }
        }
    });

    if (sync.await(timeoutms, TimeUnit.MILLISECONDS) == false) {
        zk.close();
        throw new IOException("Connection to zookeeper timed out. connectionString: " + connectionString);
    }
}

From source file:com.navercorp.nbasearc.confmaster.server.WatchEventHandler.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    if (event.getType() == Event.EventType.None) {
        Logger.info(event.toString());
        if (event.getState() == Watcher.Event.KeeperState.SyncConnected) {
            Logger.info("Connection to zookeeper is established. {}", event);
            Logger.flush(INFO);//  w  w  w  . j  a  v a 2s.  co  m
            connWait.countDown();
        } else if (event.getState() == Watcher.Event.KeeperState.Expired) {
            Logger.info("ZooKeeper session expired, shutdown... {}", event);
            Logger.flush(DEBUG);
            System.exit(-1);
        } else {
            Logger.info("Connection to ZooKeeper state changed. {}", event);
            Logger.flush(INFO);
        }
    } else if (event.getType() == Event.EventType.NodeChildrenChanged
            || event.getType() == Event.EventType.NodeDataChanged) {
        processChildrenOrDataChangedEvent(event);
    }
}

From source file:com.navercorp.pinpoint.flink.cluster.FlinkServerRegister.java

License:Apache License

@SuppressWarnings("deprecation")
@Override//w  ww  .  j  a v  a2s  .co  m
public void process(WatchedEvent event) {
    logger.info("Handle Zookeeper Event({}) started.", event);

    KeeperState state = event.getState();
    EventType eventType = event.getType();
    String path = event.getPath();

    // when this happens, ephemeral node disappears
    // reconnects automatically, and process gets notified for all events
    boolean result = false;
    if (ZookeeperUtils.isDisconnectedEvent(event)) {
        result = handleDisconnected();
        if (state == KeeperState.Expired) {
            client.reconnectWhenSessionExpired();
        }
    } else if (state == KeeperState.SyncConnected || state == KeeperState.NoSyncConnected) {
        if (eventType == EventType.None) {
            result = handleConnected();
        } else if (eventType == EventType.NodeChildrenChanged) {
            logger.info("zookeeper Event occurs : NodeChildrenChanged event");
        } else if (eventType == EventType.NodeDeleted) {
            logger.info("zookeeper Event occurs : NodeDeleted");
        } else if (eventType == EventType.NodeDataChanged) {
            logger.info("zookeeper Event occurs : NodeDataChanged");
        }
    }

    if (result) {
        logger.info("Handle Zookeeper Event({}) completed.", event);
    } else {
        logger.info("Handle Zookeeper Event({}) failed.", event);
    }
}

From source file:com.navercorp.pinpoint.web.cluster.zookeeper.ZookeeperClusterManager.java

License:Apache License

@SuppressWarnings("deprecation")
@Override//from  ww  w.jav a2 s. c o  m
public void process(WatchedEvent event) {
    synchronized (initializeLock) {
        // wait for client variable to be assigned.
    }

    logger.info("Zookeeper Event({}) occurred.", event);

    KeeperState state = event.getState();
    EventType eventType = event.getType();
    String path = event.getPath();

    // when this happens, ephemeral node disappears
    // reconnects automatically, and process gets notified for all events
    boolean result = false;
    if (ZookeeperUtils.isDisconnectedEvent(event)) {
        result = handleDisconnected();
        if (state == KeeperState.Expired) {
            client.reconnectWhenSessionExpired();
        }
    } else if (state == KeeperState.SyncConnected || state == KeeperState.NoSyncConnected) {
        if (eventType == EventType.None) {
            result = handleConnected();
        } else if (eventType == EventType.NodeChildrenChanged) {
            result = handleNodeChildrenChanged(path);
        } else if (eventType == EventType.NodeDeleted) {
            result = handleNodeDeleted(path);
        } else if (eventType == EventType.NodeDataChanged) {
            result = handleNodeDataChanged(path);
        }
    }

    if (result) {
        logger.info("Zookeeper Event({}) succeeded.", event);
    } else {
        logger.info("Zookeeper Event({}) failed.", event);
    }
}

From source file:com.navercorp.redis.cluster.gateway.NodeWatcher.java

License:Apache License

/**
 * @param event//from   ww w . j  a va 2s . c  o  m
 * @see org.apache.zookeeper.Watcher#process(org.apache.zookeeper.WatchedEvent)
 */
public void process(WatchedEvent event) {
    log.debug("[NodeWatcher] Zookeeper watched");
    log.info("[NodeWatcher] Event {type=" + event.getType() + ", state=" + event.getState() + ", path="
            + event.getPath() + "}");

    if (event.getType() == Event.EventType.None) {
        switch (event.getState()) {
        case SyncConnected:
            log.debug("[NodeWatcher] SyncConnected");
            this.connLatcher.countDown();
            break;
        default:

        }
    } else if (event.getType() == Event.EventType.NodeChildrenChanged) {
        log.debug("[NodeWatcher] NodeChildrenChanged");
        reloadGatewaylist();
        reloadGatewayAffinity();
    } else if (event.getType() == Event.EventType.NodeDataChanged) {
        log.debug("[NodeWatcher] NodeDataChanged");
        reloadGatewayAffinity();
    } else if (event.getType() == Event.EventType.NodeDeleted) {
        log.debug("[NodeWatcher] NodeDeleted");
    } else if (event.getType() == Event.EventType.NodeCreated) {
        log.debug("[NodeWatcher] NodeCreated");
    }
}

From source file:com.navercorp.redis.cluster.ZookeeperConTest.java

License:Apache License

/**
 * @param event/*from  w w  w .  j  a v a2 s.co m*/
 * @see org.apache.zookeeper.Watcher#process(org.apache.zookeeper.WatchedEvent)
 */
public void process(WatchedEvent event) {
    log.info("[NodeWatcher] Event {type=" + event.getType() + ", state=" + event.getState() + ", path="
            + event.getPath() + "}");

    if (event.getType() == Event.EventType.None) {
        switch (event.getState()) {
        case SyncConnected:
            log.debug("SyncConnected");
            this.connLatcher.countDown();
            break;
        default:

        }
    }
}

From source file:com.nearinfinity.blur.manager.indexserver.BlurServerShutDown.java

License:Apache License

public void register(final BlurShutdown shutdown, ZooKeeper zooKeeper) {
    this.shutdown = shutdown;
    this.zooKeeper = zooKeeper;
    zooKeeper.register(new Watcher() {
        @Override/*from w  w  w  .j  av  a  2s .c  o  m*/
        public void process(WatchedEvent event) {
            KeeperState state = event.getState();
            if (state == KeeperState.Expired) {
                LOG.fatal("Zookeeper session has [" + state + "] server process shutting down.");
                shutdown.shutdown();
            }
        }
    });
}

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;/*ww  w.  java2s .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;
    }
}