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()

Source Link

Usage

From source file:com.ebay.jetstream.messaging.zookeeper.lp.Consumer.java

License:MIT License

@Override
public void process(WatchedEvent event) {
    switch (event.getType()) {
    case NodeChildrenChanged:
        childrenChanged++;//from   w  ww .j ava  2 s  .  c  o m
        setChildrenWatch(event.getPath());
        break;
    case NodeCreated:
        nodecreated++;
        setChildrenWatch(event.getPath());
        break;
    case NodeDataChanged:
        //System.out.println(" changed Node" + event.getPath());
        datachanged++;
        getData(event.getPath());
        setNodeWatch(event.getPath());

        break;
    case NodeDeleted:
        break;
    case None:
        break;
    default:
        break;
    }
}

From source file:com.ebay.jetstream.messaging.zookeeper.lp.ZKTester.java

License:MIT License

@Override
public void process(WatchedEvent event) {

    switch (event.getType()) {

    case NodeChildrenChanged:
        break;//from w  w  w .  j  a va 2s .c  o  m
    case NodeCreated:
        break;
    case NodeDataChanged:
        try {
            //   Stat stat = framework.checkExists().forPath(event.getPath());
            //   long curtime = System.currentTimeMillis();
            //   long delay = curtime - stat.getMtime();
            // System.out.println("Notification delay : " + delay);
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        listenercounter++;

        break;
    case NodeDeleted:
        break;
    case None:
        break;
    default:
        break;
    }

}

From source file:com.edmunds.etm.agent.impl.RuleSetMonitor.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    String path = event.getPath();
    if (path != null && path.equals(ruleSetNodePath)) {
        switch (event.getType()) {
        case NodeCreated:
        case NodeDataChanged:
            AsyncCallback.DataCallback cb = new AsyncCallback.DataCallback() {
                @Override// ww  w.ja va 2 s  . c o  m
                public void processResult(int rc, String path, Object ctx, byte[] data, Stat stat) {
                    onGetRuleSetData(Code.get(rc), path, data);
                }
            };
            connection.getData(ruleSetNodePath, this, cb, null);
        case None:
        case NodeDeleted:
        case NodeChildrenChanged:
        default:
            // Ignore other event types
        }
    }
}

From source file:com.edmunds.zookeeper.election.ZooKeeperElection.java

License:Apache License

private void processCurrentWatcher(ZooKeeperElectionContext ctx, WatchedEvent event) {

    final KeeperState connectionState = event.getState();
    if (connectionState == KeeperState.SyncConnected) {

        // Has someone blown our node away ?
        if (event.getType() == EventType.NodeDeleted) {
            // Withdraw from this election and sign up again.
            if (ctx.isActive()) {
                withdrawAndEnroll(ctx, "Current Node Deleted");
            }/*w w w . j a  v  a2  s . c o  m*/
        }
    } else {
        error("Connection lost - Primary watch: " + connectionState, Code.CONNECTIONLOSS, "/", ctx);
        withdrawInternal(ctx, "Current Node Connection Lost");
    }
}

From source file:com.edmunds.zookeeper.treewatcher.ZooKeeperTreeWatcher.java

License:Apache License

private void processEvent(WatchedEvent event, ZooKeeperTreeState state) {
    final String path = event.getPath();
    final ZooKeeperTreeNode node = state.getNode(path);
    final Event.EventType eventType = event.getType();

    switch (eventType) {
    case NodeCreated:
        if (rootPath.equals(path)) {
            scanRootNode();/*www.jav a2s.  c  om*/
        } else {
            recoverableError(path, eventType, "Unexpected node Created");
        }
        break;
    case NodeDataChanged:
        if (node != null) {
            state.setFlags(path, false, node.isChildListConsistent());
            getData(path, null);
        } else {
            recoverableError(path, eventType, "Path is not tracked");
        }
        break;
    case NodeChildrenChanged:
        if (node != null) {
            state.setFlags(path, node.isDataConsistent(), false);
            getChildren(path, null);
        } else {
            recoverableError(path, eventType, "Path is not tracked");
        }
        break;
    case NodeDeleted:
        // Apply deletions immediately.
        if (node != null) {
            safeDelete(path);
        }
        break;
    default:
        unexpectedEventError(event);
        break;
    }
}

From source file:com.ery.estorm.zk.ZooKeeperWatcher.java

License:Apache License

/**
 * Method called from ZooKeeper for events and connection status.
 * <p>//  www.j ava  2 s. co  m
 * Valid events are passed along to listeners. Connection status changes are
 * dealt with locally.
 */
@Override
public void process(WatchedEvent event) {

    String path = event.getPath();
    if (path != null || EventType.NodeDeleted == event.getType()) {
        try {
            ZKUtil.watchAndCheckExists(this, path);
        } catch (KeeperException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    LOG.debug(prefix("Received ZooKeeper Event, " + "type=" + event.getType() + ", " + "state="
            + event.getState() + ", " + "path=" + path));
    switch (event.getType()) {

    // If event type is NONE, this is a connection status change
    case None: {
        connectionEvent(event);
        break;
    }

    // Otherwise pass along to the listeners

    case NodeCreated: {
        for (ZooKeeperListener listener : listeners) {
            listener.nodeCreated(path);
        }
        break;
    }

    case NodeDeleted: {
        for (ZooKeeperListener listener : listeners) {
            listener.nodeDeleted(path);
        }
        break;
    }

    case NodeDataChanged: {
        for (ZooKeeperListener listener : listeners) {
            listener.nodeDataChanged(path);
        }
        break;
    }

    case NodeChildrenChanged: {
        for (ZooKeeperListener listener : listeners) {
            listener.nodeChildrenChanged(path);
        }
        break;
    }
    }
}

From source file:com.example.directorio.ZooKeeperMannager.java

public String getData(String path2) throws InterruptedException, KeeperException, UnsupportedEncodingException {
    final String path = path2;
    Stat stat = znode_exists(path);//from   w  w w  .  j av  a2 s  .c o  m

    byte[] b = null;
    if (stat != null) {
        b = zk.getData(path, new Watcher() {
            public void process(WatchedEvent we) {
                if (we.getType() == Event.EventType.None) {
                    switch (we.getState()) {
                    case Expired:
                        zkConnection.getConnectedSignal().countDown();
                        break;
                    }

                } else {
                    try {
                        byte[] bn = zk.getData(path, false, null);
                        String data = new String(bn, "UTF-8");
                        System.out.println(data);
                        zkConnection.getConnectedSignal().countDown();

                    } catch (Exception ex) {
                        ex.printStackTrace();
                    }
                }
            }
        }, null);

        String data = new String(b, "UTF-8");
        //System.out.println(data);
        zkConnection.getConnectedSignal().await();

    } else {
        System.out.println("Node does not exists");
    }
    return new String(b);
}

From source file:com.facebook.zookeeper.election.TestZkLeaderElection.java

License:Apache License

@Test(groups = "fast")
public void testEnter() throws Exception {
    // Verify no candidates
    MockWatcher mockWatcher = new MockWatcher();
    List<String> candidates = zk1.getChildren(electionRoot, mockWatcher);
    Assert.assertTrue(candidates.isEmpty());

    // Enter the candidate and run any callbacks
    zkLeaderElection1.enter();//from  w  w w. j a  v  a 2s . co m
    mockExecutor1.drain();

    // Check that candidate is created
    candidates = zk1.getChildren(electionRoot, null);
    Assert.assertEquals(candidates.size(), 1);

    // Check that candidate is elected
    Assert.assertTrue(mockLeaderElectionCallback1.isElected());
    mockLeaderElectionCallback1.resetElected();
    Assert.assertEquals(zkLeaderElection1.getLeader(), candidates.get(0));

    // Check data contents
    String data = VariablePayload.decode(zk1.getData(electionRoot + "/" + candidates.get(0), null, null));
    Assert.assertEquals(data, testData1);

    // Check that external watch was notified of candidate creation
    Assert.assertEquals(mockWatcher.getEventQueue().size(), 1);
    WatchedEvent watchedEvent = mockWatcher.getEventQueue().remove();
    Assert.assertEquals(watchedEvent.getType(), EventType.NodeChildrenChanged);
    Assert.assertEquals(watchedEvent.getPath(), electionRoot);
}

From source file:com.facebook.zookeeper.election.TestZkLeaderElection.java

License:Apache License

@Test(groups = "fast")
public void testWithdraw() throws Exception {
    zkLeaderElection1.enter();/*from w  w  w .j a  v a  2  s .  c  om*/
    mockExecutor1.drain();

    // Verify candidate
    MockWatcher mockWatcher = new MockWatcher();
    List<String> candidates = zk1.getChildren(electionRoot, mockWatcher);
    Assert.assertEquals(candidates.size(), 1);
    Assert.assertTrue(mockLeaderElectionCallback1.isElected());
    mockLeaderElectionCallback1.resetElected();

    zkLeaderElection1.withdraw();
    mockExecutor1.drain();

    candidates = zk1.getChildren(electionRoot, null);
    Assert.assertTrue(candidates.isEmpty());
    Assert.assertEquals(zkLeaderElection1.getLeader(), null);
    // Manual withdraw should not trigger a "removed" callback
    Assert.assertFalse(mockLeaderElectionCallback1.isRemoved());
    Assert.assertEquals(mockWatcher.getEventQueue().size(), 1);
    WatchedEvent watchedEvent = mockWatcher.getEventQueue().remove();
    Assert.assertEquals(watchedEvent.getType(), EventType.NodeChildrenChanged);
    Assert.assertEquals(watchedEvent.getPath(), electionRoot);
}

From source file:com.fjn.helper.frameworkex.apache.zookeeper.dispatcher.Dispatcher.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    event.getPath();
    event.getState();
    event.getType();

}