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:org.apache.bookkeeper.zookeeper.BkZooKeeperClient.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    if (event.getType() == EventType.None && event.getState() == KeeperState.Expired) {
        onExpired();/*w ww. j  ava2  s  .  c om*/
    }
}

From source file:org.apache.bookkeeper.zookeeper.TestZooKeeperClient.java

License:Apache License

@Test(timeout = 12000)
public void testReconnectAfterExipred() throws Exception {
    final CountDownLatch expireLatch = new CountDownLatch(1);
    Watcher testWatcher = new Watcher() {

        @Override//from   ww  w .j  a  va  2 s. c om
        public void process(WatchedEvent event) {
            if (event.getType() == EventType.None && event.getState() == KeeperState.Expired) {
                expireLatch.countDown();
            }
        }

    };
    final int timeout = 2000;
    ZooKeeperWatcherBase watcherManager = new ZooKeeperWatcherBase(timeout).addChildWatcher(testWatcher);
    List<Watcher> watchers = new ArrayList<Watcher>(1);
    watchers.add(testWatcher);
    ZooKeeperClient client = new ShutdownZkServerClient(zkUtil.getZooKeeperConnectString(), timeout,
            watcherManager, new BoundExponentialBackoffRetryPolicy(timeout, timeout, 0));
    client.waitForConnection();
    Assert.assertTrue("Client failed to connect an alive ZooKeeper.", client.getState().isConnected());
    logger.info("Expire zookeeper client");
    expireZooKeeperSession(client, timeout);

    // wait until session expire
    Assert.assertTrue("Client registered watcher should receive expire event.",
            expireLatch.await(2 * timeout, TimeUnit.MILLISECONDS));

    Assert.assertFalse("Client doesn't receive expire event from ZooKeeper.", client.getState().isConnected());

    try {
        client.exists("/tmp", false);
        Assert.fail("Should fail due to connection loss.");
    } catch (KeeperException.ConnectionLossException cle) {
        // expected
    } catch (KeeperException.SessionExpiredException cle) {
        // expected
    }

    zkUtil.restartServer();

    // wait for a reconnect cycle
    Thread.sleep(2 * timeout);
    Assert.assertTrue("Client failed to connect zookeeper even it was back.", client.getState().isConnected());
    try {
        client.exists("/tmp", false);
    } catch (KeeperException.ConnectionLossException cle) {
        Assert.fail("Should not throw ConnectionLossException");
    } catch (KeeperException.SessionExpiredException cle) {
        Assert.fail("Should not throw SessionExpiredException");
    }
}

From source file:org.apache.bookkeeper.zookeeper.ZooKeeperWatcherBase.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    // If event type is NONE, this is a connection status change
    if (event.getType() != EventType.None) {
        LOG.debug("Received event: {}, path: {} from ZooKeeper server", event.getType(), event.getPath());
        getEventCounter(event.getType()).inc();
        // notify the child watchers
        notifyEvent(event);/*w  w w .  ja v  a  2s .com*/
        return;
    }
    getStateCounter(event.getState()).inc();
    LOG.debug("Received {} from ZooKeeper server", event.getState());
    // TODO: Needs to handle AuthFailed, SaslAuthenticated events
    switch (event.getState()) {
    case SyncConnected:
        LOG.info("ZooKeeper client is connected now.");
        clientConnectLatch.countDown();
        break;
    case Disconnected:
        LOG.info(
                "ZooKeeper client is disconnected from zookeeper now, but it is OK unless we received EXPIRED event.");
        break;
    case Expired:
        clientConnectLatch = new CountDownLatch(1);
        LOG.error("ZooKeeper client connection to the ZooKeeper server has expired!");
        break;
    default:
        // do nothing
        break;
    }
    // notify the child watchers
    notifyEvent(event);
}

From source file:org.apache.camel.component.zookeeper.operations.FutureEventDrivenOperation.java

License:Apache License

public void process(WatchedEvent event) {
    this.event = event;
    EventType received = event.getType();
    if (LOG.isDebugEnabled()) {
        LOG.debug(format("Recieved event of type %s for node '%s'", received, event.getPath()));
    }//ww w.  j a  v a2  s  .c om

    for (EventType watched : awaitedTypes) {
        if (watched.equals(received)) {
            result = getResult();
            waitForAnyWatchedType.countDown();
        }
    }

    if (LOG.isTraceEnabled() && waitForAnyWatchedType.getCount() > 0) {

        StringBuilder b = new StringBuilder();
        for (EventType type : awaitedTypes) {
            b.append(type).append(", ");
        }
        if (b.length() > 0) {
            b.setLength(b.length() - 2);
        }
        LOG.trace(String.format("Recieved event of type %s did not match any watched types %s", received,
                awaitedTypes));
    }
}

From source file:org.apache.camel.component.zookeeper.ZooKeeperMessage.java

License:Apache License

public ZooKeeperMessage(String node, Stat statistics, Map<String, Object> headers, WatchedEvent watchedEvent) {
    setHeaders(headers);/*from  w  w w  .  j  a  v  a  2s.  c  om*/
    this.setHeader(ZOOKEEPER_NODE, node);
    this.setHeader(ZOOKEEPER_STATISTICS, statistics);
    if (watchedEvent != null) {
        this.setHeader(ZOOKEEPER_EVENT_TYPE, watchedEvent.getType());
    }
}

From source file:org.apache.cassandra.mutex.ClusterMutex.java

License:Apache License

/**
 * process any events from ZooKeeper. We simply wake up any clients that are waiting for
 * file deletion. Number of clients is usually very small (most likely just one), so no need
 * for any complex logic.//from  w ww. j a  va 2s.  c o  m
 */
public void process(WatchedEvent event) {
    if (logger.isTraceEnabled())
        logger.trace("Got event " + event.getType() + ", keeper state " + event.getState() + ", path "
                + event.getPath());

    synchronized (mutex) {
        mutex.notifyAll();
    }
}

From source file:org.apache.curator.ConnectionState.java

License:Apache License

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

    final boolean eventTypeNone = event.getType() == Watcher.Event.EventType.None;

    if (eventTypeNone) {
        boolean wasConnected = isConnected.get();
        boolean newIsConnected = checkState(event.getState(), wasConnected);
        if (newIsConnected != wasConnected) {
            isConnected.set(newIsConnected);
            connectionStartMs = System.currentTimeMillis();
        }
    }

    // only wait during tests
    if (debugWaitOnExpiredEvent && event.getState() == Event.KeeperState.Expired) {
        waitOnExpiredEvent();
    }

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

    if (eventTypeNone)
        handleState(event.getState());
}

From source file:org.apache.curator.framework.imps.EnsembleTracker.java

License:Apache License

@Override
public void process(WatchedEvent event) throws Exception {
    if (event.getType() == Watcher.Event.EventType.NodeDataChanged) {
        reset();//from ww w  .ja  v  a2 s.  c o  m
    }
}

From source file:org.apache.curator.framework.imps.TestEnabledSessionExpiredState.java

License:Apache License

@Test
public void testInjectedWatchedEvent() throws Exception {
    Assert.assertEquals(states.poll(timing.milliseconds(), TimeUnit.MILLISECONDS), ConnectionState.CONNECTED);

    final CountDownLatch latch = new CountDownLatch(1);
    Watcher watcher = new Watcher() {
        @Override/*from  ww w.ja  va 2 s . co m*/
        public void process(WatchedEvent event) {
            if (event.getType() == Event.EventType.None) {
                if (event.getState() == Event.KeeperState.Expired) {
                    latch.countDown();
                }
            }
        }
    };
    client.checkExists().usingWatcher(watcher).forPath("/");
    server.stop();
    Assert.assertTrue(timing.forSessionSleep().awaitLatch(latch));
}

From source file:org.apache.curator.framework.imps.TestReconfiguration.java

License:Apache License

private CountDownLatch setChangeWaiter(CuratorFramework client) throws Exception {
    final CountDownLatch latch = new CountDownLatch(1);
    Watcher watcher = new Watcher() {
        @Override//from   w w w.j a v a 2  s  .  c  o  m
        public void process(WatchedEvent event) {
            if (event.getType() == Event.EventType.NodeDataChanged) {
                latch.countDown();
            }
        }
    };
    client.getConfig().usingWatcher(watcher).forEnsemble();
    return latch;
}