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.curator.x.rpc.RpcTests.java

License:Apache License

@Test
public void testEphemeralCleanup() throws Exception {
    CuratorProjection curatorProjection = curatorServiceClient.newCuratorProjection("test");
    CreateSpec spec = new CreateSpec();
    spec.path = "/test";
    spec.data = ByteBuffer.wrap("value".getBytes());
    spec.mode = CreateMode.EPHEMERAL;/*from  w w  w.jav a2s  .  c  o m*/
    OptionalPath node = curatorServiceClient.createNode(curatorProjection, spec);
    System.out.println(node);

    final CountDownLatch latch = new CountDownLatch(1);
    CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
    try {
        client.start();
        Watcher watcher = new Watcher() {
            @Override
            public void process(WatchedEvent event) {
                if (event.getType() == Event.EventType.NodeDeleted) {
                    latch.countDown();
                }
            }
        };
        client.checkExists().usingWatcher(watcher).forPath("/test");

        curatorServiceClient.closeCuratorProjection(curatorProjection);

        Assert.assertTrue(timing.awaitLatch(latch));
    } finally {
        CloseableUtils.closeQuietly(client);
    }
}

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;// w w w . j  a va 2 s .c  o  m
    }
    if (Event.EventType.NodeChildrenChanged == watchedEvent.getType()) {
        // fetch the namespace
        fetchSubNamespaces(this).whenComplete(this);
    }
}

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

License:Apache License

/**
 * Process the watched events for registered listeners.
 *//* w  w w  .  ja  v a 2  s.com*/
@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;
    }
}

From source file:org.apache.flume.node.MyWatcher.java

License:Apache License

public void process(WatchedEvent event) {
    try {//from   w w  w . j  a  v a2 s  .co  m
        if ((event.getPath() != null) && (event.getType() != Watcher.Event.EventType.None))
            ZooKeeperUtils.keeper.exists(this.path, new MyWatcher(this.path));
    } catch (Exception e) {
        logger.error("watcher:", e);
    }
    logger.info("zookeeper node change :" + event.getPath() + "-" + event.getType().toString());
    if (StringUtils.isEmpty(this.path))
        return;
    if ((this.path.equals(event.getPath())) && (event.getType() == Watcher.Event.EventType.NodeDeleted))
        System.exit(0);
}

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());
    }//  w w  w  . j a  v  a  2  s .c  om

    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.bsp.BspService.java

License:Apache License

/**
 * Process WatchedEvent for Mapping Inputsplits
 *
 * @param event watched event/*from  w  w  w.  j  a v  a  2  s  . c  o  m*/
 * @return true if event processed
 */
public final boolean processMappingEvent(WatchedEvent event) {
    boolean eventProcessed = false;
    if (event.getPath().equals(mappingInputSplitsPaths.getAllReadyPath())
            && (event.getType() == EventType.NodeCreated)) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: inputSplitsReadyChanged " + "(input splits ready)");
        }
        mappingInputSplitsEvents.getAllReadyChanged().signal();
        eventProcessed = true;
    } else if (event.getPath().endsWith(MAPPING_INPUT_SPLIT_RESERVED_NODE)
            && (event.getType() == EventType.NodeCreated)) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("process: mappingInputSplitsStateChanged " + "(made a reservation)");
        }
        mappingInputSplitsEvents.getStateChanged().signal();
        eventProcessed = true;
    } else if (event.getPath().endsWith(MAPPING_INPUT_SPLIT_RESERVED_NODE)
            && (event.getType() == EventType.NodeDeleted)) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: mappingInputSplitsStateChanged " + "(lost a reservation)");
        }
        mappingInputSplitsEvents.getStateChanged().signal();
        eventProcessed = true;
    } else if (event.getPath().endsWith(MAPPING_INPUT_SPLIT_FINISHED_NODE)
            && (event.getType() == EventType.NodeCreated)) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("process: mappingInputSplitsStateChanged " + "(finished inputsplit)");
        }
        mappingInputSplitsEvents.getStateChanged().signal();
        eventProcessed = true;
    } else if (event.getPath().endsWith(MAPPING_INPUT_SPLIT_DONE_DIR)
            && (event.getType() == EventType.NodeChildrenChanged)) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("process: mappingInputSplitsDoneStateChanged " + "(worker finished sending)");
        }
        mappingInputSplitsEvents.getDoneStateChanged().signal();
        eventProcessed = true;
    } else if (event.getPath().equals(mappingInputSplitsPaths.getAllDonePath())
            && (event.getType() == EventType.NodeCreated)) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: mappingInputSplitsAllDoneChanged " + "(all entries sent from input splits)");
        }
        mappingInputSplitsEvents.getAllDoneChanged().signal();
        eventProcessed = true;
    }
    return eventProcessed;
}

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

License:Apache License

/**
 * Process WatchedEvent for Vertex Inputsplits
 *
 * @param event watched event/*from   w w w . jav  a 2  s .c  o  m*/
 * @return true if event processed
 */
public final boolean processVertexEvent(WatchedEvent event) {
    boolean eventProcessed = false;
    if (event.getPath().equals(vertexInputSplitsPaths.getAllReadyPath())
            && (event.getType() == EventType.NodeCreated)) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: inputSplitsReadyChanged " + "(input splits ready)");
        }
        vertexInputSplitsEvents.getAllReadyChanged().signal();
        eventProcessed = true;
    } else if (event.getPath().endsWith(VERTEX_INPUT_SPLIT_RESERVED_NODE)
            && (event.getType() == EventType.NodeCreated)) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("process: vertexInputSplitsStateChanged " + "(made a reservation)");
        }
        vertexInputSplitsEvents.getStateChanged().signal();
        eventProcessed = true;
    } else if (event.getPath().endsWith(VERTEX_INPUT_SPLIT_RESERVED_NODE)
            && (event.getType() == EventType.NodeDeleted)) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: vertexInputSplitsStateChanged " + "(lost a reservation)");
        }
        vertexInputSplitsEvents.getStateChanged().signal();
        eventProcessed = true;
    } else if (event.getPath().endsWith(VERTEX_INPUT_SPLIT_FINISHED_NODE)
            && (event.getType() == EventType.NodeCreated)) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("process: vertexInputSplitsStateChanged " + "(finished inputsplit)");
        }
        vertexInputSplitsEvents.getStateChanged().signal();
        eventProcessed = true;
    } else if (event.getPath().endsWith(VERTEX_INPUT_SPLIT_DONE_DIR)
            && (event.getType() == EventType.NodeChildrenChanged)) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("process: vertexInputSplitsDoneStateChanged " + "(worker finished sending)");
        }
        vertexInputSplitsEvents.getDoneStateChanged().signal();
        eventProcessed = true;
    } else if (event.getPath().equals(vertexInputSplitsPaths.getAllDonePath())
            && (event.getType() == EventType.NodeCreated)) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: vertexInputSplitsAllDoneChanged " + "(all vertices sent from input splits)");
        }
        vertexInputSplitsEvents.getAllDoneChanged().signal();
        eventProcessed = true;
    }
    return eventProcessed;
}

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

License:Apache License

/**
 * Process WatchedEvent for Edge Inputsplits
 *
 * @param event watched event/* w w w. j a v  a  2  s .c o m*/
 * @return true if event processed
 */
public final boolean processEdgeEvent(WatchedEvent event) {
    boolean eventProcessed = false;
    if (event.getPath().equals(edgeInputSplitsPaths.getAllReadyPath())
            && (event.getType() == EventType.NodeCreated)) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: edgeInputSplitsReadyChanged " + "(input splits ready)");
        }
        edgeInputSplitsEvents.getAllReadyChanged().signal();
        eventProcessed = true;
    } else if (event.getPath().endsWith(EDGE_INPUT_SPLIT_RESERVED_NODE)
            && (event.getType() == EventType.NodeCreated)) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("process: edgeInputSplitsStateChanged " + "(made a reservation)");
        }
        edgeInputSplitsEvents.getStateChanged().signal();
        eventProcessed = true;
    } else if (event.getPath().endsWith(EDGE_INPUT_SPLIT_RESERVED_NODE)
            && (event.getType() == EventType.NodeDeleted)) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: edgeInputSplitsStateChanged " + "(lost a reservation)");
        }
        edgeInputSplitsEvents.getStateChanged().signal();
        eventProcessed = true;
    } else if (event.getPath().endsWith(EDGE_INPUT_SPLIT_FINISHED_NODE)
            && (event.getType() == EventType.NodeCreated)) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("process: edgeInputSplitsStateChanged " + "(finished inputsplit)");
        }
        edgeInputSplitsEvents.getStateChanged().signal();
        eventProcessed = true;
    } else if (event.getPath().endsWith(EDGE_INPUT_SPLIT_DONE_DIR)
            && (event.getType() == EventType.NodeChildrenChanged)) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("process: edgeInputSplitsDoneStateChanged " + "(worker finished sending)");
        }
        edgeInputSplitsEvents.getDoneStateChanged().signal();
        eventProcessed = true;
    } else if (event.getPath().equals(edgeInputSplitsPaths.getAllDonePath())
            && (event.getType() == EventType.NodeCreated)) {
        if (LOG.isInfoEnabled()) {
            LOG.info("process: edgeInputSplitsAllDoneChanged " + "(all edges sent from input splits)");
        }
        edgeInputSplitsEvents.getAllDoneChanged().signal();
        eventProcessed = true;
    }
    return eventProcessed;
}

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());
    }/*from  w  w  w . j  av  a2  s  . co  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() + ")");
    }
}

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

License:Apache License

@Override
public boolean processEvent(WatchedEvent event) {
    boolean foundEvent = false;
    if (event.getPath().contains(WORKER_HEALTHY_DIR) && (event.getType() == EventType.NodeDeleted)) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("processEvent: Healthy worker died (node deleted) " + "in " + event.getPath());
        }//from   w  w w. ja va 2 s. c o  m
        checkHealthyWorkerFailure(event.getPath());
        superstepStateChanged.signal();
        foundEvent = true;
    } else if (event.getPath().contains(WORKER_FINISHED_DIR)
            && event.getType() == EventType.NodeChildrenChanged) {
        if (LOG.isDebugEnabled()) {
            LOG.debug(
                    "processEvent: Worker finished (node change) " + "event - superstepStateChanged signaled");
        }
        superstepStateChanged.signal();
        foundEvent = true;
    }

    return foundEvent;
}