Examples with WatchedEvent org.apache.zookeeper.WatchedEvent used on opensource projects

Example 56 with WatchedEvent

use of org.apache.zookeeper.WatchedEvent in project curator by Netflix.

the class CuratorZKClientBridge method connect.

@Override
public void connect(final Watcher watcher) {
    if (watcher != null) {
        CuratorListener localListener = new CuratorListener() {

            @Override
            public void eventReceived(CuratorFramework client, CuratorEvent event) throws Exception {
                if (event.getWatchedEvent() != null) {
                    watcher.process(event.getWatchedEvent());
                }
            }
        };
        curator.getCuratorListenable().addListener(localListener);
        listener.set(localListener);
        try {
            BackgroundCallback callback = new BackgroundCallback() {

                @Override
                public void processResult(CuratorFramework client, CuratorEvent event) throws Exception {
                    WatchedEvent fakeEvent = new WatchedEvent(Watcher.Event.EventType.None, curator.getZookeeperClient().isConnected() ? Watcher.Event.KeeperState.SyncConnected : Watcher.Event.KeeperState.Disconnected, null);
                    watcher.process(fakeEvent);
                }
            };
            curator.checkExists().inBackground(callback).forPath("/foo");
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}

Example 57 with WatchedEvent

use of org.apache.zookeeper.WatchedEvent in project yyl_example by Relucent.

the class Test1 method main.

public static void main(String[] args) throws Exception {
    ZooKeeper zk = new ZooKeeper("localhost:2181", 1000, new Watcher() {

        // 监控所有被触发的事件
        public void process(WatchedEvent event) {
            System.out.println("已经触发了" + event.getType() + "事件！");
        }
    });
    // 创建一个目录节点
    zk.create("/testRootPath", "testRootData".getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
    // 创建一个子目录节点
    zk.create("/testRootPath/testChildPathOne", "testChildDataOne".getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
    System.out.println(new String(zk.getData("/testRootPath", false, null)));
    // 取出子目录节点列表
    System.out.println(zk.getChildren("/testRootPath", true));
    // 修改子目录节点数据
    zk.setData("/testRootPath/testChildPathOne", "modifyChildDataOne".getBytes(), -1);
    System.out.println("目录节点状态：[" + zk.exists("/testRootPath", true) + "]");
    // 创建另外一个子目录节点
    zk.create("/testRootPath/testChildPathTwo", "testChildDataTwo".getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
    System.out.println(new String(zk.getData("/testRootPath/testChildPathTwo", true, null)));
    // 删除子目录节点
    zk.delete("/testRootPath/testChildPathTwo", -1);
    zk.delete("/testRootPath/testChildPathOne", -1);
    // 删除父目录节点
    zk.delete("/testRootPath", -1);
    // 关闭连接
    zk.close();
}

Example 58 with WatchedEvent

use of org.apache.zookeeper.WatchedEvent in project yyl_example by Relucent.

the class Test3 method main.

public static void main(String[] args) {
    ZooKeeper zk = null;
    try {
        zk = new ZooKeeper("localhost:2181", 1000, null);
        zk.exists("/test", new Watcher() {

            @Override
            public void process(WatchedEvent e) {
                System.out.println(e);
            }
        });
        Thread.sleep(60 * 1000);
    } catch (Exception e) {
        e.printStackTrace();
        try {
            if (zk != null) {
                zk.close();
            }
        } catch (Exception e1) {
        }
    }
}

Example 59 with WatchedEvent

use of org.apache.zookeeper.WatchedEvent in project distributedlog by twitter.

the class LocalDLMEmulator method connectZooKeeper.

public static ZooKeeper connectZooKeeper(String zkHost, int zkPort, int zkTimeoutSec) throws IOException, KeeperException, InterruptedException {
    final CountDownLatch latch = new CountDownLatch(1);
    final String zkHostPort = zkHost + ":" + zkPort;
    ZooKeeper zkc = new ZooKeeper(zkHostPort, zkTimeoutSec * 1000, new Watcher() {

        public void process(WatchedEvent event) {
            if (event.getState() == Event.KeeperState.SyncConnected) {
                latch.countDown();
            }
        }
    });
    if (!latch.await(zkTimeoutSec, TimeUnit.SECONDS)) {
        throw new IOException("Zookeeper took too long to connect");
    }
    return zkc;
}

Example 60 with WatchedEvent

use of org.apache.zookeeper.WatchedEvent in project distributedlog by twitter.

the class ZooKeeperClient method registerExpirationHandler.

/**
 * Clients that need to re-establish state after session expiration can register an
 * {@code onExpired} command to execute.
 *
 * @param onExpired the {@code Command} to register
 * @return the new {@link Watcher} which can later be passed to {@link #unregister} for
 *         removal.
 */
public Watcher registerExpirationHandler(final ZooKeeperSessionExpireNotifier onExpired) {
    Watcher watcher = new Watcher() {

        @Override
        public void process(WatchedEvent event) {
            if (event.getType() == EventType.None && event.getState() == KeeperState.Expired) {
                try {
                    onExpired.notifySessionExpired();
                } catch (Exception exc) {
                // do nothing
                }
            }
        }
    };
    register(watcher);
    return watcher;
}