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.github.mosuka.zookeeper.nicli.util.ZooKeeperConnection.java

License:Apache License

public void connect(String server, int timeout) throws IOException, InterruptedException {
    zookeeper = new ZooKeeper(server, timeout, new Watcher() {
        public void process(WatchedEvent event) {
            if (event.getState() == KeeperState.SyncConnected) {
                connSignal.countDown();/*w  ww  .j av  a 2  s.c  o  m*/
            }
        }
    });
    connSignal.await();
}

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From source file:com.github.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  .  ja 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
            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");
    }
}

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From source file:com.glaf.cluster.catalina.session.ConnectionWatcher.java

License:Apache License

public void process(WatchedEvent event) {
    KeeperState state = event.getState();
    if (state == KeeperState.SyncConnected) {
        signal.countDown();//from  w  w  w.  j a  v  a2 s  .c o  m
    }
}

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From source file:com.glaf.cluster.catalina.session.ZooKeeperClientImpl.java

License:Apache License

protected void doStart() {
    try {//from   www .  ja va 2s .co  m
        final Watcher watcher = new Watcher() {
            @Override
            public void process(WatchedEvent event) {
                switch (event.getState()) {
                case Expired:
                    resetSession();
                    break;
                case SyncConnected:
                    notifySessionConnected();
                    break;
                case Disconnected:
                    notifySessionDisconnected();
                    break;
                default:
                    break;
                }
            }
        };
        zooKeeper = zooKeeperFactory.newZooKeeper(watcher);
        createPersistentNode(GROUP_NAME);
    } catch (InterruptedException e) {
        throw new RuntimeException("Cannot start ZooKeeper client", e);
    }
}

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From source file:com.glaf.core.test.zookeeper.CreateGroup.java

License:Apache License

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

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From source file:com.griddynamics.jagger.coordinator.zookeeper.ZookeeperCoordinator.java

License:Open Source License

@Override
public void registerNode(NodeContext nodeContext, Set<Worker> workers, final StatusChangeListener listener)
        throws CoordinatorException {
    log.info("Going to register node {} with {} workers", nodeContext.getId(), workers.size());

    ZNode typeNode = rootNode.child(CoordinationUtil.nodeNameOf(nodeContext.getId().getType()));
    ZNode node = typeNode.createChild(znode().withPath(nodeContext.getId().getIdentifier()));

    Set<CommandExecutor<?, ?>> executors = Sets.newHashSet();
    Set<Qualifier<?>> qualifiers = Sets.newHashSet();

    for (Worker worker : workers) {
        for (CommandExecutor<?, ?> executor : worker.getExecutors()) {
            Qualifier<?> qualifier = executor.getQualifier();
            if (qualifiers.contains(qualifier)) {
                throw new CoordinatorException(
                        "Executor for qualifier " + qualifier + " is already registered");
            }/*from  www.j  av a2 s .  c om*/

            executors.add(executor);
        }
    }

    for (CommandExecutor<?, ?> executor : executors) {
        registerExecutor(nodeContext, executor, node);
    }

    rootNode.addNodeWatcher(new Watcher() {
        @Override
        public void process(WatchedEvent event) {
            if (event.getState() == Event.KeeperState.Disconnected) {
                listener.onCoordinatorDisconnected();
            }

            if (event.getState() == Event.KeeperState.SyncConnected) {
                listener.onCoordinatorConnected();
            }
        }
    });

    ZNode statuses = rootNode.child(CoordinationUtil.STATUSES_NODE_NAME);

    statuses.createChild(znode().ephemeralSequential().withDataObject(nodeContext.getId()));

    Lock lock = new ReentrantLock();

    lock.lock();
    try {
        Collection<NodeId> nodeIds = Sets.newHashSet();
        StatusWatcher statusWatcher = new StatusWatcher(statuses, lock, nodeIds, listener);
        List<ZNode> nodes = statuses.children(statusWatcher);
        for (ZNode zNode : nodes) {
            nodeIds.add(zNode.getObject(NodeId.class));
        }
    } finally {
        lock.unlock();
    }

    node.createChild(znode().withPath(CoordinationUtil.AVAILABLE_NODE_NAME));
}

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From source file:com.griddynamics.jagger.coordinator.zookeeper.ZooKeeperFactory.java

License:Open Source License

public IZookeeper create() {
    final CountDownLatch connectedSignal = new CountDownLatch(1);
    IZookeeper zooKeeper = null;//from  www. j  a v a 2s  . c o m

    try {
        zooKeeper = new DefaultZookeeper(connectString, sessionTimeout, new Watcher() {
            @Override
            public void process(WatchedEvent event) {
                if (event.getState() == Event.KeeperState.SyncConnected) {
                    connectedSignal.countDown();
                }
            }
        }, reconnectPeriod);

        connectedSignal.await();

    } catch (Exception e) {
        throw new ZooException(e);
    }

    return zooKeeper;
}

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From source file:com.guang.eunormia.common.dislock.ZKClient.java

License:Open Source License

@Override
synchronized public void process(WatchedEvent event) {
    Event.KeeperState state = event.getState();
    if (state == Event.KeeperState.SyncConnected) {
        connectedSignal.countDown();/*from   ww w .  jav  a 2 s.  c  o  m*/
    } else if (state == Event.KeeperState.Expired) {
        logger.warn("- the connect to ZooKeeper session expired ...");
        connect();
    } else if (state == Event.KeeperState.Disconnected) {
        logger.warn("- the zookeeper state is disconnected and it will connect later ...");
    } else {
        logger.warn("- the zookeeper state is " + state);
    }
}

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From source file:com.gxl.shark.resources.conn.ZookeeperConnectionManager.java

License:Apache License

/**
 * zookeeper/*from w w w .  ja v a2s.co  m*/
 * 
 * @author JohnGao
 */
private void connection() {
    try {
        zk_client = new ZooKeeper(zk_address, zk_session_timeout, new Watcher() {
            @Override
            public void process(WatchedEvent event) {
                final KeeperState STATE = event.getState();
                final String VALUE = "zookeeper?[" + zk_address + "]";
                switch (STATE) {
                case SyncConnected:
                    countDownLatch.countDown();
                    logger.info(VALUE + "?");
                    break;
                case Disconnected:
                    logger.warn(VALUE + "?");
                    break;
                case Expired:
                    logger.error(VALUE + "??");
                    break;
                case AuthFailed:
                    logger.error(VALUE + "?ACL?");
                default:
                    break;
                }
            }
        });
        countDownLatch.await();
        /* ?? */
        registerNode.register(zk_client, nodePath);
    } catch (IOException e) {
        throw new ResourceException("zookeeper?[" + e.toString() + "]");
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
}

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From source file:com.gxl.test.shark.resource.zkSetData.java

License:Apache License

public @Test void testSetData() {
    try (BufferedReader reader = new BufferedReader(new FileReader("c:/shark-datasource.xml"))) {
        StringBuffer str = new StringBuffer();
        String value = "";
        while (null != (value = reader.readLine()))
            str.append(value);/* w w  w .  java2s  .  c om*/
        final CountDownLatch countDownLatch = new CountDownLatch(1);
        ZooKeeper zk_client = new ZooKeeper(
                "120.25.58.116:2181,120.25.58.116:2182,120.25.58.116:2183,120.25.58.116:2184", 30000,
                new Watcher() {
                    @Override
                    public void process(WatchedEvent event) {
                        final KeeperState STATE = event.getState();
                        switch (STATE) {
                        case SyncConnected:
                            countDownLatch.countDown();
                            logger.info("?zookeeper?");
                            break;
                        case Disconnected:
                            logger.warn("zookeeper?");
                            break;
                        case Expired:
                            logger.error("session?...");
                            break;
                        case AuthFailed:
                            logger.error("ACL?...");
                        default:
                            break;
                        }
                    }
                });
        countDownLatch.await();
        zk_client.setData("/info/datasource", str.toString().getBytes(), -1);
        logger.info("insert success");
    } catch (Exception e) {
        logger.error("insert fail", e);
    }
}

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