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.continuuity.weave.internal.state.ZKServiceDecorator.java

License:Open Source License

private void watchMessages() {
    final String messagesPath = getZKPath("messages");
    Futures.addCallback(zkClient.getChildren(messagesPath, new Watcher() {
        @Override/*  w w w.  j  a  v  a 2 s .  co m*/
        public void process(WatchedEvent event) {
            // TODO: Do we need to deal with other type of events?
            if (event.getType() == Event.EventType.NodeChildrenChanged && decoratedService.isRunning()) {
                watchMessages();
            }
        }
    }), new FutureCallback<NodeChildren>() {
        @Override
        public void onSuccess(NodeChildren result) {
            // Sort by the name, which is the messageId. Assumption is that message ids is ordered by time.
            List<String> messages = Lists.newArrayList(result.getChildren());
            Collections.sort(messages);
            for (String messageId : messages) {
                processMessage(messagesPath + "/" + messageId, messageId);
            }
        }

        @Override
        public void onFailure(Throwable t) {
            // TODO: what could be done besides just logging?
            LOG.error("Failed to watch messages.", t);
        }
    });
}

From source file:com.continuuity.weave.internal.zookeeper.RewatchOnExpireWatcher.java

License:Open Source License

@Override
public void process(WatchedEvent event) {
    if (delegate != null && event.getType() != Event.EventType.None) {
        try {/*from  w  w  w.j  a v  a 2 s  .c  o m*/
            delegate.process(event);
        } catch (Throwable t) {
            LOG.error("Watcher throws exception.", t);
        }
    }

    if (event.getState() != Event.KeeperState.Expired) {
        return;
    }
    switch (actionType) {
    case EXISTS:
        exists();
        break;
    case CHILDREN:
        children();
        break;
    case DATA:
        data();
        break;
    }
}

From source file:com.continuuity.weave.zookeeper.ZKOperations.java

License:Open Source License

public static void watchDeleted(final ZKClient zkClient, final String path,
        final SettableFuture<String> completion) {

    Futures.addCallback(zkClient.exists(path, new Watcher() {
        @Override//from   w  w  w . jav  a 2s .  com
        public void process(WatchedEvent event) {
            if (!completion.isDone()) {
                if (event.getType() == Event.EventType.NodeDeleted) {
                    completion.set(path);
                } else {
                    watchDeleted(zkClient, path, completion);
                }
            }
        }
    }), new FutureCallback<Stat>() {
        @Override
        public void onSuccess(Stat result) {
            if (result == null) {
                completion.set(path);
            }
        }

        @Override
        public void onFailure(Throwable t) {
            completion.setException(t);
        }
    });
}

From source file:com.dang.crawler.conlony.zookeeper.election.LeaderElectionSupport.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    if (event.getType().equals(Event.EventType.NodeDeleted)) {
        if (!event.getPath().equals(leaderOffer.getNodePath()) && state != State.STOP) {
            logger.debug("Node {} deleted. Need to run through the election process.", event.getPath());
            try {
                determineElectionStatus();
            } catch (KeeperException e) {
                becomeFailed(e);//from  w w  w .ja  va  2  s  . c  o  m
            } catch (InterruptedException e) {
                becomeFailed(e);
            }
        }
    }
}

From source file:com.dangdang.config.service.easyzk.ConfigNodeEventListener.java

License:Apache License

@Override
public void eventReceived(CuratorFramework client, CuratorEvent event) throws Exception {
    if (LOGGER.isDebugEnabled()) {
        LOGGER.debug(event.toString());/*from   w w w .  j  a v  a 2  s.  c o  m*/
    }

    final WatchedEvent watchedEvent = event.getWatchedEvent();
    if (watchedEvent != null) {

        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug(watchedEvent.toString());
        }

        if (watchedEvent.getState() == KeeperState.SyncConnected) {
            boolean someChange = false;
            switch (watchedEvent.getType()) {
            case NodeChildrenChanged:
                configNode.loadNode(false);
                someChange = true;
                break;
            case NodeDataChanged:
                configNode.loadKey(watchedEvent.getPath());
                someChange = true;
                break;
            default:
                break;
            }

            if (someChange && configNode.getConfigLocalCache() != null) {
                configNode.getConfigLocalCache().saveLocalCache(configNode, configNode.getNode());
            }
        }
    }
}

From source file:com.dangdang.config.service.zookeeper.ConfigNodeEventListener.java

License:Apache License

@Override
public void eventReceived(CuratorFramework client, CuratorEvent event) throws Exception {
    if (LOGGER.isDebugEnabled()) {
        LOGGER.debug(event.toString());/*  w  w w  . j a  va 2s . co m*/
    }

    final WatchedEvent watchedEvent = event.getWatchedEvent();
    if (watchedEvent != null) {
        LOGGER.debug("Watched event: {}" + watchedEvent);

        if (watchedEvent.getState() == KeeperState.SyncConnected) {
            boolean someChange = false;
            switch (watchedEvent.getType()) {
            case NodeChildrenChanged:
                configNode.loadNode();
                someChange = true;
                break;
            case NodeDataChanged:
                configNode.reloadKey(watchedEvent.getPath());
                someChange = true;
                break;
            default:
                break;
            }

            if (someChange && configNode.getConfigLocalCache() != null) {
                configNode.getConfigLocalCache().saveLocalCache(configNode, configNode.getNode());
            }
        }
    }
}

From source file:com.dangdang.config.service.zookeeper.ZookeeperConfigGroup.java

License:Apache License

/**
 * ?//from   w  ww .j av a2  s . c  om
 */
private void initConfigs() {
    client = CuratorFrameworkFactory.newClient(configProfile.getConnectStr(), configProfile.getRetryPolicy());
    client.start();

    client.getCuratorListenable().addListener(new CuratorListener() {
        @Override
        public void eventReceived(CuratorFramework client, CuratorEvent event) throws Exception {
            LOGGER.info("Event: {}", event);

            final WatchedEvent watchedEvent = event.getWatchedEvent();
            if (watchedEvent != null) {
                LOGGER.debug("Watched event: {}", watchedEvent);

                if (watchedEvent.getState() == Watcher.Event.KeeperState.SyncConnected) {
                    switch (watchedEvent.getType()) {
                    case NodeChildrenChanged:
                        loadNode();
                        break;
                    case NodeDataChanged:
                        reloadKey(watchedEvent.getPath());
                        break;
                    default:
                        break;
                    }
                }
            }
        }
    });

    final CountDownLatch countDownLatch = new CountDownLatch(1);
    client.getConnectionStateListenable().addListener(new ConnectionStateListener() {

        @Override
        public void stateChanged(CuratorFramework client, ConnectionState newState) {
            LOGGER.info("Connection state change: {}", newState);
            if (newState == ConnectionState.CONNECTED) {
                LOGGER.debug("Loading properties for node: {}", node);
                loadNode();
                countDownLatch.countDown();
            } else if (newState == ConnectionState.RECONNECTED) {
                loadNode();
            }
        }
    });

    try {
        countDownLatch.await();
    } catch (InterruptedException e) {
        LOGGER.error(e.getMessage(), e);
        throw new RuntimeException("Config Load error.", e);
    }

    // Update local cache
    if (configLocalCache != null) {
        configLocalCache.saveLocalCache(this, node);
    }
}

From source file:com.datis.zookafka.client.Creator.java

@Override
public void process(WatchedEvent e) {
    LOG.info("Processing event: " + e.toString());
    if (e.getType() == Event.EventType.None) {
        switch (e.getState()) {
        case SyncConnected:
            System.out.println("Event SynConnected");
            connected = true;/*from  w w  w  .ja  v  a2  s . c  o m*/
            break;
        case Disconnected:
            System.out.println("Event Disconnected");
            connected = false;
            break;
        case Expired:
            System.out.println("Event Expired");
            expired = true;
            connected = false;
            LOG.error("Session expiration");
        default:
            break;
        }
    }
}

From source file:com.demo.master_work.Client.java

License:Apache License

public void process(WatchedEvent e) {
    System.out.println(e);//  w  ww.  ja v  a2  s.  c o  m
    if (e.getType() == Event.EventType.None) {
        switch (e.getState()) {
        case SyncConnected:
            connected = true;
            break;
        case Disconnected:
            connected = false;
            break;
        case Expired:
            expired = true;
            connected = false;
            System.out.println("Exiting due to session expiration");
        default:
            break;
        }
    }
}

From source file:com.dianping.lion.client.zookeeper.SessionRecoverableZookeeper.java

License:Open Source License

@Override
public void process(WatchedEvent event) {
    if (event.getType() == Event.EventType.None && event.getState() == KeeperState.Expired) {
        try {/*from   w  w  w .j  a va  2  s .co m*/
            reconnectToZookeeper(this.zookeeper);
        } catch (Exception e) {
            logger.warn("Reconnect to zookeeper cluster failed while session expired.", e);
        }
    }
    if (this.watcher != null) {
        this.watcher.process(event);
    }
}