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.apache.curator.x.async.details.InternalWatcher.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    final WatchedEvent localEvent = (watcherFilter != null) ? watcherFilter.apply(event) : event;
    switch (localEvent.getState()) {
    default: {/*  w w w . ja  v a 2 s.com*/
        if ((watchMode != WatchMode.stateChangeOnly) && (localEvent.getType() != Event.EventType.None)) {
            if (!future.complete(localEvent)) {
                future.obtrudeValue(localEvent);
            }
        }
        break;
    }

    case Disconnected:
    case AuthFailed:
    case Expired: {
        if (watchMode != WatchMode.successOnly) {
            AsyncEventException exception = new AsyncEventException() {
                private final AtomicBoolean isReset = new AtomicBoolean(false);

                @Override
                public Event.KeeperState getKeeperState() {
                    return localEvent.getState();
                }

                @Override
                public CompletionStage<WatchedEvent> reset() {
                    Preconditions.checkState(isReset.compareAndSet(false, true), "Already reset");
                    future = new CompletableFuture<>();
                    return future;
                }
            };
            future.completeExceptionally(exception);
        }
        break;
    }
    }
}

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From source file:org.apache.curator.x.rpc.idl.structs.RpcCuratorEvent.java

License:Apache License

public RpcCuratorEvent(WatchedEvent event) {
    this.type = RpcCuratorEventType.WATCHED;
    this.resultCode = 0;
    this.path = event.getPath();
    this.context = null;
    this.stat = null;
    this.data = null;
    this.name = null;
    this.children = null;
    this.aclList = null;
    this.watchedEvent = new RpcWatchedEvent(RpcKeeperState.valueOf(event.getState().name()),
            RpcEventType.valueOf(event.getType().name()), event.getPath());
    this.leaderEvent = null;
    this.childrenCacheEvent = null;
}

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From source file:org.apache.curator.x.rpc.idl.structs.RpcWatchedEvent.java

License:Apache License

public RpcWatchedEvent(WatchedEvent watchedEvent) {
    keeperState = RpcKeeperState.valueOf(watchedEvent.getState().name());
    eventType = RpcEventType.valueOf(watchedEvent.getType().name());
    path = watchedEvent.getPath();//from w w w  .  j a  va  2 s  .  co  m
}

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From source file:org.apache.cxf.dosgi.discovery.zookeeper.ZooKeeperDiscovery.java

License:Apache License

public void process(WatchedEvent event) {
    LOG.debug("got ZooKeeper event " + event);
    switch (event.getState()) {
    case SyncConnected:
        LOG.info("Connection to ZooKeeper established");
        // this event can be triggered more than once in a row (e.g. after Disconnected event),
        // so we must be re-entrant here
        start();/*from  ww w .j a  va 2s  .  c o m*/
        break;

    case Expired:
        LOG.info("Connection to ZooKeeper expired. Trying to create a new connection");
        stop(false);
        createZooKeeper(curConfiguration);
        break;

    default:
        // ignore other events
        break;
    }
}

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From source file:org.apache.distributedlog.impl.federated.FederatedZKLogMetadataStore.java

License:Apache License

@Override
public void process(WatchedEvent watchedEvent) {
    if (Event.EventType.None == watchedEvent.getType()
            && Event.KeeperState.Expired == watchedEvent.getState()) {
        scheduleTask(this, conf.getZKSessionTimeoutMilliseconds());
        return;/*from w  w w  . j a  v a  2  s  .  c o  m*/
    }
    if (Event.EventType.NodeChildrenChanged == watchedEvent.getType()) {
        // fetch the namespace
        fetchSubNamespaces(this).whenComplete(this);
    }
}

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From source file:org.apache.distributedlog.impl.ZKLogSegmentMetadataStore.java

License:Apache License

/**
 * Process the watched events for registered listeners.
 *//*ww  w.ja  v a  2s .  co  m*/
@Override
public void process(WatchedEvent event) {
    if (Event.EventType.None == event.getType() && Event.KeeperState.Expired == event.getState()) {
        Set<String> keySet = new HashSet<String>(listeners.keySet());
        for (String logSegmentsPath : keySet) {
            scheduleTask(logSegmentsPath, new ReadLogSegmentsTask(logSegmentsPath, this), 0L);
        }
        return;
    }
    String path = event.getPath();
    if (null == path) {
        return;
    }
    switch (event.getType()) {
    case NodeDeleted:
        notifyLogStreamDeleted(path, listeners.remove(path));
        break;
    case NodeChildrenChanged:
        new ReadLogSegmentsTask(path, this).run();
        break;
    default:
        break;
    }
}

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From source file:org.apache.giraph.bsp.BspService.java

License:Apache License

@Override
public final void process(WatchedEvent event) {
    // 1. Process all shared events
    // 2. Process specific derived class events
    if (LOG.isDebugEnabled()) {
        LOG.debug("process: Got a new event, path = " + event.getPath() + ", type = " + event.getType()
                + ", state = " + event.getState());
    }/*from  ww  w  .j  ava  2 s . c  o m*/

    if ((event.getPath() == null) && (event.getType() == EventType.None)) {
        if (event.getState() == KeeperState.Disconnected) {
            // Watches may not be triggered for some time, so signal all BspEvents
            for (BspEvent bspEvent : registeredBspEvents) {
                bspEvent.signal();
            }
            LOG.warn("process: Disconnected from ZooKeeper (will automatically " + "try to recover) " + event);
        } else if (event.getState() == KeeperState.SyncConnected) {
            if (LOG.isInfoEnabled()) {
                LOG.info("process: Asynchronous connection complete.");
            }
            connectedEvent.signal();
        } else {
            LOG.warn("process: Got unknown null path event " + event);
        }
        return;
    }

    boolean eventProcessed = false;
    if (event.getPath().startsWith(masterJobStatePath)) {
        // This will cause all becomeMaster() MasterThreads to notice the
        // change in job state and quit trying to become the master.
        masterElectionChildrenChanged.signal();
        eventProcessed = true;
    } else if ((event.getPath().contains(WORKER_HEALTHY_DIR) || event.getPath().contains(WORKER_UNHEALTHY_DIR))
            && (event.getType() == EventType.NodeChildrenChanged)) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("process: workerHealthRegistrationChanged "
                    + "(worker health reported - healthy/unhealthy )");
        }
        workerHealthRegistrationChanged.signal();
        eventProcessed = true;
    } else if (processMappingEvent(event) || processVertexEvent(event) || processEdgeEvent(event)) {
        return;
    } else if (event.getPath().contains(ADDRESSES_AND_PARTITIONS_DIR)
            && event.getType() == EventType.NodeCreated) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: partitionAssignmentsReadyChanged " + "(partitions are assigned)");
        }
        addressesAndPartitionsReadyChanged.signal();
        eventProcessed = true;
    } else if (event.getPath().contains(SUPERSTEP_FINISHED_NODE) && event.getType() == EventType.NodeCreated) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: superstepFinished signaled");
        }
        superstepFinished.signal();
        eventProcessed = true;
    } else if (event.getPath().endsWith(applicationAttemptsPath)
            && event.getType() == EventType.NodeChildrenChanged) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: applicationAttemptChanged signaled");
        }
        applicationAttemptChanged.signal();
        eventProcessed = true;
    } else if (event.getPath().contains(MASTER_ELECTION_DIR)
            && event.getType() == EventType.NodeChildrenChanged) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: masterElectionChildrenChanged signaled");
        }
        masterElectionChildrenChanged.signal();
        eventProcessed = true;
    } else if (event.getPath().equals(cleanedUpPath) && event.getType() == EventType.NodeChildrenChanged) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: cleanedUpChildrenChanged signaled");
        }
        cleanedUpChildrenChanged.signal();
        eventProcessed = true;
    }

    if (!(processEvent(event)) && (!eventProcessed)) {
        LOG.warn("process: Unknown and unprocessed event (path=" + event.getPath() + ", type=" + event.getType()
                + ", state=" + event.getState() + ")");
    }
}

---

From source file:org.apache.giraph.graph.BspService.java

License:Apache License

@Override
public final void process(WatchedEvent event) {
    // 1. Process all shared events
    // 2. Process specific derived class events
    if (LOG.isDebugEnabled()) {
        LOG.debug("process: Got a new event, path = " + event.getPath() + ", type = " + event.getType()
                + ", state = " + event.getState());
    }/*w ww .  ja  v a  2  s .c o m*/

    if ((event.getPath() == null) && (event.getType() == EventType.None)) {
        if (event.getState() == KeeperState.Disconnected) {
            // No way to recover from a disconnect event, signal all BspEvents
            for (BspEvent bspEvent : registeredBspEvents) {
                bspEvent.signal();
            }
            throw new RuntimeException("process: Disconnected from ZooKeeper, cannot recover - " + event);
        } else if (event.getState() == KeeperState.SyncConnected) {
            if (LOG.isInfoEnabled()) {
                LOG.info("process: Asynchronous connection complete.");
            }
            connectedEvent.signal();
        } else {
            LOG.warn("process: Got unknown null path event " + event);
        }
        return;
    }

    boolean eventProcessed = false;
    if (event.getPath().startsWith(masterJobStatePath)) {
        // This will cause all becomeMaster() MasterThreads to notice the
        // change in job state and quit trying to become the master.
        masterElectionChildrenChanged.signal();
        eventProcessed = true;
    } else if ((event.getPath().contains(WORKER_HEALTHY_DIR) || event.getPath().contains(WORKER_UNHEALTHY_DIR))
            && (event.getType() == EventType.NodeChildrenChanged)) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("process: workerHealthRegistrationChanged "
                    + "(worker health reported - healthy/unhealthy )");
        }
        workerHealthRegistrationChanged.signal();
        eventProcessed = true;
    } else if (event.getPath().equals(inputSplitsAllReadyPath) && (event.getType() == EventType.NodeCreated)) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: inputSplitsReadyChanged " + "(input splits ready)");
        }
        inputSplitsAllReadyChanged.signal();
        eventProcessed = true;
    } else if (event.getPath().endsWith(INPUT_SPLIT_RESERVED_NODE)
            && (event.getType() == EventType.NodeCreated)) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("process: inputSplitsStateChanged " + "(made a reservation)");
        }
        inputSplitsStateChanged.signal();
        eventProcessed = true;
    } else if (event.getPath().endsWith(INPUT_SPLIT_RESERVED_NODE)
            && (event.getType() == EventType.NodeDeleted)) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: inputSplitsStateChanged " + "(lost a reservation)");
        }
        inputSplitsStateChanged.signal();
        eventProcessed = true;
    } else if (event.getPath().endsWith(INPUT_SPLIT_FINISHED_NODE)
            && (event.getType() == EventType.NodeCreated)) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("process: inputSplitsStateChanged " + "(finished inputsplit)");
        }
        inputSplitsStateChanged.signal();
        eventProcessed = true;
    } else if (event.getPath().endsWith(INPUT_SPLIT_DONE_DIR)
            && (event.getType() == EventType.NodeChildrenChanged)) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("process: inputSplitsDoneStateChanged " + "(worker finished sending)");
        }
        inputSplitsDoneStateChanged.signal();
        eventProcessed = true;
    } else if (event.getPath().equals(inputSplitsAllDonePath) && (event.getType() == EventType.NodeCreated)) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: inputSplitsAllDoneChanged " + "(all vertices sent from input splits)");
        }
        inputSplitsAllDoneChanged.signal();
        eventProcessed = true;
    } else if (event.getPath().contains(PARTITION_ASSIGNMENTS_DIR)
            && event.getType() == EventType.NodeCreated) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: partitionAssignmentsReadyChanged " + "(partitions are assigned)");
        }
        partitionAssignmentsReadyChanged.signal();
        eventProcessed = true;
    } else if (event.getPath().contains(SUPERSTEP_FINISHED_NODE) && event.getType() == EventType.NodeCreated) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: superstepFinished signaled");
        }
        superstepFinished.signal();
        eventProcessed = true;
    } else if (event.getPath().endsWith(applicationAttemptsPath)
            && event.getType() == EventType.NodeChildrenChanged) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: applicationAttemptChanged signaled");
        }
        applicationAttemptChanged.signal();
        eventProcessed = true;
    } else if (event.getPath().contains(MASTER_ELECTION_DIR)
            && event.getType() == EventType.NodeChildrenChanged) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: masterElectionChildrenChanged signaled");
        }
        masterElectionChildrenChanged.signal();
        eventProcessed = true;
    } else if (event.getPath().equals(cleanedUpPath) && event.getType() == EventType.NodeChildrenChanged) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: cleanedUpChildrenChanged signaled");
        }
        cleanedUpChildrenChanged.signal();
        eventProcessed = true;
    }

    if (!(processEvent(event)) && (!eventProcessed)) {
        LOG.warn("process: Unknown and unprocessed event (path=" + event.getPath() + ", type=" + event.getType()
                + ", state=" + event.getState() + ")");
    }
}

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From source file:org.apache.giraph.worker.InputSplitsHandler.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    if (event.getPath() == null) {
        LOG.warn("process: Problem with zookeeper, got event with path null, " + "state " + event.getState()
                + ", event type " + event.getType());
        return;//from   ww w  .  j a  va2  s  . c  om
    }
    // Check if the reservation for the input split was lost
    // (some worker died)
    if (event.getPath().endsWith(inputSplitReservedNode)
            && event.getType() == Watcher.Event.EventType.NodeDeleted) {
        synchronized (pathList) {
            String split = event.getPath();
            split = split.substring(0, split.indexOf(inputSplitReservedNode));
            pathList.add(split);
            if (LOG.isInfoEnabled()) {
                LOG.info("process: Input split " + split + " lost reservation");
            }
        }
    }
}

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From source file:org.apache.hadoop.contrib.bkjournal.BKJMUtil.java

License:Apache License

static ZooKeeper connectZooKeeper() throws IOException, KeeperException, InterruptedException {
    final CountDownLatch latch = new CountDownLatch(1);

    ZooKeeper zkc = new ZooKeeper(zkEnsemble, 3600, new Watcher() {
        public void process(WatchedEvent event) {
            if (event.getState() == Watcher.Event.KeeperState.SyncConnected) {
                latch.countDown();//from  w w w.  j  a  v  a2s . c  o m
            }
        }
    });
    if (!latch.await(3, TimeUnit.SECONDS)) {
        throw new IOException("Zookeeper took too long to connect");
    }
    return zkc;
}

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