Example usage for org.apache.zookeeper WatchedEvent getType

List of usage examples for org.apache.zookeeper WatchedEvent getType

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Introduction

In this page you can find the example usage for org.apache.zookeeper WatchedEvent getType.

Prototype

public EventType getType()

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Usage

From source file:com.haoocai.jscheduler.core.monitor.TaskExecutionMonitor.java

License:Apache License

@Override
public void process(WatchedEvent watchedEvent) {
    watch();//from   ww w  .  j  a v  a2  s .  c o m
    if (watchedEvent.getType() == Event.EventType.NodeDataChanged) {
        byte[] doneSchedulerUnitBytes = zkAccessor.getData(watchedEvent.getPath());
        updateDoneInfoLock.lock();
        recvDoneSchedulerUnit = new SchedulerUnit(new String(doneSchedulerUnitBytes));
        recvDonePoint = System.currentTimeMillis();
        updateDoneInfoLock.unlock();
    }
}

From source file:com.jkoolcloud.tnt4j.streams.configure.zookeeper.ZKConfigManager.java

License:Apache License

/**
 * Initializes ZK ensemble node data monitoring (over {@link org.apache.zookeeper.Watcher}) and initial data
 * loading./*from w  w w .j a va2s. co m*/
 * 
 * @param zk
 *            ZooKeeper instance
 * @param path
 *            node path
 * @param zkCfgChangeListener
 *            zookeeper node data change listener instance
 */
public static void handleZKStoredConfiguration(final ZooKeeper zk, final String path,
        final ZKConfigChangeListener zkCfgChangeListener) {
    Watcher watch = new Watcher() {
        @Override
        public void process(WatchedEvent watchedEvent) {
            if (path.equals(watchedEvent.getPath())) {
                if (watchedEvent.getType() == Event.EventType.NodeDataChanged) {
                    LOGGER.log(OpLevel.DEBUG, StreamsResources.getString(StreamsResources.RESOURCE_BUNDLE_NAME,
                            "ZKConfigManager.node.changed"), path);
                    zkCfgChangeListener.reconfigure(zk, path, this);
                } else if (watchedEvent.getType() == Event.EventType.NodeDeleted) {
                    LOGGER.log(OpLevel.DEBUG, StreamsResources.getString(StreamsResources.RESOURCE_BUNDLE_NAME,
                            "ZKConfigManager.node.deleted"), path);
                    zk.exists(path, this, null, null);
                } else if (watchedEvent.getType() == Event.EventType.NodeCreated) {
                    LOGGER.log(OpLevel.DEBUG, StreamsResources.getString(StreamsResources.RESOURCE_BUNDLE_NAME,
                            "ZKConfigManager.node.created"), path);
                    zkCfgChangeListener.reconfigure(zk, path, this);
                }
            }
        }
    };

    Stat nStat = null;

    try {
        nStat = zk.exists(path, false);
    } catch (Exception exc) {
        LOGGER.log(OpLevel.WARNING, StreamsResources.getString(StreamsResources.RESOURCE_BUNDLE_NAME,
                "ZKConfigManager.node.exists.failed"), path, exc);
    }

    if (nStat == null) {
        LOGGER.log(OpLevel.DEBUG, StreamsResources.getString(StreamsResources.RESOURCE_BUNDLE_NAME,
                "ZKConfigManager.node.create.wait"), path);
        zk.exists(path, watch, null, null);
    } else {
        zkCfgChangeListener.reconfigure(zk, path, watch);
    }
}

From source file:com.jointhegrid.ironcount.manager.WorkerThread.java

License:Apache License

@Override
public void process(WatchedEvent we) {
    logger.debug(we);/*  w  w w  . ja v  a 2 s.  c  o  m*/
    if (we.getType() == EventType.NodeDataChanged) {
        if (we.getPath().equals("/ironcount/workloads/" + this.workload.name)) {
            logger.debug("change detected " + we);
            try {
                Stat s = zk.exists("/ironcount/workloads/" + this.workload.name, false);
                byte[] dat = zk.getData("/ironcount/workloads/" + this.workload.name, false, s);
                Workload w = this.m.deserializeWorkload(dat);
                if (w.active.equals(Boolean.FALSE)) {
                    this.goOn = false;
                    this.executor.shutdown();
                    logger.debug("Shutdown");
                }
            } catch (KeeperException ex) {
                logger.error(ex);
                throw new RuntimeException(ex);
            } catch (InterruptedException ex) {
                logger.error(ex);
                throw new RuntimeException(ex);
            }
        }
    }
}

From source file:com.jointhegrid.ironcount.manager.WorkloadManager.java

License:Apache License

@Override
public void process(WatchedEvent we) {
    logger.debug(we);/*from w ww.  j  a  va2s  . com*/
    if (we.getType() == we.getType().NodeCreated) {
        try {
            if (we.getPath().equals("/ironcount/workloads")) {
                List<String> children = zk.getChildren("/ironcount/workloads", this);
                considerStarting(children);
            }
        } catch (KeeperException ex) {
            throw new RuntimeException(ex);
        } catch (InterruptedException ex) {
            throw new RuntimeException(ex);
        }
    }
    if (we.getType() == we.getType().NodeDeleted) {
        if (we.getPath().startsWith("/ironcount/workloads")) {
            stopWorkerThreadIfRunning(we.getPath());
        }
    }
    if (we.getType() == we.getType().NodeChildrenChanged) {
        if (we.getPath().equals("/ironcount/workloads")) {
            try {
                //new workloads have been added NOT DELETED
                List<String> children = zk.getChildren("/ironcount/workloads", this);
                considerStarting(children);

            } catch (KeeperException ex) {
                throw new RuntimeException(ex);
            } catch (InterruptedException ex) {
                throw new RuntimeException(ex);
            }
        }
    }
}

From source file:com.jxt.web.cluster.zookeeper.ZookeeperClusterDataManager.java

License:Apache License

@SuppressWarnings("deprecation")
@Override/*from  w  ww  . jav  a 2  s .  c o  m*/
public void process(WatchedEvent event) {
    logger.info("Handle Zookeeper Event({}) started.", event);

    KeeperState state = event.getState();
    EventType eventType = event.getType();
    String path = event.getPath();

    // when this happens, ephemeral node disappears
    // reconnects automatically, and process gets notified for all events
    boolean result = false;
    if (ZookeeperUtils.isDisconnectedEvent(event)) {
        result = handleDisconnected();
        if (state == KeeperState.Expired) {
            client.reconnectWhenSessionExpired();
        }
    } else if (state == KeeperState.SyncConnected || state == KeeperState.NoSyncConnected) {
        if (eventType == EventType.None) {
            result = handleConnected();
        } else if (eventType == EventType.NodeChildrenChanged) {
            result = handleNodeChildrenChanged(path);
        } else if (eventType == EventType.NodeDeleted) {
            result = handleNodeDeleted(path);
        } else if (eventType == EventType.NodeDataChanged) {
            result = handleNodeDataChanged(path);
        }
    }

    if (result) {
        logger.info("Handle Zookeeper Event({}) completed.", event);
    } else {
        logger.info("Handle Zookeeper Event({}) failed.", event);
    }
}

From source file:com.jxt.web.cluster.zookeeper.ZookeeperUtils.java

License:Apache License

public static boolean isConnectedEvent(WatchedEvent event) {
    KeeperState state = event.getState();
    EventType eventType = event.getType();

    return isConnectedEvent(state, eventType);
}

From source file:com.jxt.web.cluster.zookeeper.ZookeeperUtils.java

License:Apache License

public static boolean isDisconnectedEvent(WatchedEvent event) {
    KeeperState state = event.getState();
    EventType eventType = event.getType();

    return isDisconnectedEvent(state, eventType);
}

From source file:com.lin.stride.zk.election.LeaderElectionSupport.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    if (event.getType().equals(Watcher.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);// ww  w  .  j ava  2  s .c  o  m
            } catch (InterruptedException e) {
                becomeFailed(e);
            }
        }
    }
}

From source file:com.linkedin.d2.discovery.stores.zk.SymlinkAwareZooKeeperTest.java

License:Apache License

@Test
public void testSymlinkWithExistWatch() throws InterruptedException, ExecutionException {
    final CountDownLatch latch = new CountDownLatch(1);
    final CountDownLatch latch2 = new CountDownLatch(1);
    final AsyncCallback.StatCallback existCallback = new AsyncCallback.StatCallback() {
        @Override// ww  w  .  j ava2 s. c o m
        public void processResult(int rc, String path, Object ctx, Stat stat) {
            KeeperException.Code result = KeeperException.Code.get(rc);
            Assert.assertEquals(result, KeeperException.Code.OK);
            latch.countDown();
        }
    };
    Watcher existWatch = new Watcher() {
        @Override
        public void process(WatchedEvent event) {
            Assert.assertEquals(event.getType(), Event.EventType.NodeCreated);
            _zkClient.getZooKeeper().exists(event.getPath(), null, existCallback, null);
        }
    };
    AsyncCallback.StatCallback existCallback2 = new AsyncCallback.StatCallback() {
        @Override
        public void processResult(int rc, String path, Object ctx, Stat stat) {
            KeeperException.Code result = KeeperException.Code.get(rc);
            Assert.assertEquals(result, KeeperException.Code.NONODE);
            latch2.countDown();
        }
    };
    // symlink: /foo/$link/newNode -> /foo/bar/newNode
    _zkClient.getZooKeeper().exists("/foo/$link/newNode", existWatch, existCallback2, null);
    latch2.await(30, TimeUnit.SECONDS);
    _zkClient.ensurePersistentNodeExists("/foo/bar/newNode", new FutureCallback<None>());
    latch.await(30, TimeUnit.SECONDS);
    _zkClient.removeNodeUnsafe("/foo/bar/newNode", new FutureCallback<None>());
}

From source file:com.linkedin.d2.discovery.stores.zk.SymlinkAwareZooKeeperTest.java

License:Apache License

@Test
public void testSymlinkWithExistWatch2() throws InterruptedException, ExecutionException {
    final CountDownLatch latch = new CountDownLatch(1);
    final CountDownLatch latch2 = new CountDownLatch(1);
    final AsyncCallback.StatCallback existCallback = new AsyncCallback.StatCallback() {
        @Override//from  w w w.  j  a v a 2s .  c o  m
        public void processResult(int rc, String path, Object ctx, Stat stat) {
            KeeperException.Code result = KeeperException.Code.get(rc);
            Assert.assertEquals(result, KeeperException.Code.OK);
            latch.countDown();
        }
    };
    Watcher existWatch = new Watcher() {
        @Override
        public void process(WatchedEvent event) {
            Assert.assertEquals(event.getType(), Event.EventType.NodeDataChanged);
            _zkClient.getZooKeeper().exists(event.getPath(), null, existCallback, null);
        }
    };
    AsyncCallback.StatCallback existCallback2 = new AsyncCallback.StatCallback() {
        @Override
        public void processResult(int rc, String path, Object ctx, Stat stat) {
            KeeperException.Code result = KeeperException.Code.get(rc);
            Assert.assertEquals(result, KeeperException.Code.NONODE);
            latch2.countDown();
        }
    };
    // symlink: /foo/$link/foo -> /foo/bar/foo, which doesn't exist
    _zkClient.getZooKeeper().exists("/foo/$link/foo", existWatch, existCallback2, null);
    latch2.await(30, TimeUnit.SECONDS);
    // update symlink. now it points to /bar/foo, which does exist.
    _zkClient.setSymlinkData("/foo/$link", "/bar", new FutureCallback<None>());
    latch.await(30, TimeUnit.SECONDS);
    // restore symlink
    _zkClient.setSymlinkData("/foo/$link", "/foo/bar", new FutureCallback<None>());
}