Example usage for org.apache.zookeeper WatchedEvent WatchedEvent

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

  1. HOME
  2. Java
  3. org.apache.zookeeper
  4. org.apache.zookeeper.*
  5. WatchedEvent
  6. WatchedEvent

Introduction

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

Prototype

public WatchedEvent(EventType eventType, KeeperState keeperState, String path)

Source Link

Document

Create a WatchedEvent with specified type, state and path

Usage

From source file:org.apache.camel.component.zookeeper.operations.FutureEventDrivenOperationTest.java

License:Apache License

@Test
public void shouldWaitForEvents() throws Exception {
    final FutureEventDrivenOperation<String> future = new FutureEventDrivenOperation<String>(null, "somepath",
            EventType.NodeCreated) {/*from ww w.  j  av  a 2s.  c  om*/

        @Override
        protected void installWatch() {
        }

        @Override
        public OperationResult<String> getResult() {
            return new OperationResult<String>(data, statistics);
        }
    };

    WatchedEvent event = new WatchedEvent(EventType.NodeCreated, null, "somepath");
    fireEventIn(future, event, 100);
    assertEquals(data, future.get().getResult());
    assertEquals(statistics, future.get().getStatistics());
    assertEquals(event, future.getWatchedEvent());
}

From source file:org.apache.curator.framework.imps.CuratorFrameworkImpl.java

License:Apache License

private void performBackgroundOperation(OperationAndData<?> operationAndData) {
    try {//from  w w w .j  a  v  a2  s. c om
        if (client.isConnected()) {
            operationAndData.callPerformBackgroundOperation();
        } else {
            client.getZooKeeper(); // important - allow connection resets, timeouts, etc. to occur
            if (operationAndData.getElapsedTimeMs() >= client.getConnectionTimeoutMs()) {
                throw new CuratorConnectionLossException();
            }
            operationAndData.sleepFor(1, TimeUnit.SECONDS);
            queueOperation(operationAndData);
        }
    } catch (Throwable e) {
        ThreadUtils.checkInterrupted(e);

        /**
         * Fix edge case reported as CURATOR-52. ConnectionState.checkTimeouts() throws KeeperException.ConnectionLossException
         * when the initial (or previously failed) connection cannot be re-established. This needs to be run through the retry policy
         * and callbacks need to get invoked, etc.
         */
        if (e instanceof CuratorConnectionLossException) {
            WatchedEvent watchedEvent = new WatchedEvent(Watcher.Event.EventType.None,
                    Watcher.Event.KeeperState.Disconnected, null);
            CuratorEvent event = new CuratorEventImpl(this, CuratorEventType.WATCHED,
                    KeeperException.Code.CONNECTIONLOSS.intValue(), null, null, operationAndData.getContext(),
                    null, null, null, watchedEvent, null);
            if (checkBackgroundRetry(operationAndData, event)) {
                queueOperation(operationAndData);
            } else {
                logError("Background retry gave up", e);
            }
        } else {
            handleBackgroundOperationException(operationAndData, e);
        }
    }
}

From source file:org.apache.curator.utils.InjectSessionExpiration.java

License:Apache License

public static void injectSessionExpiration(ZooKeeper zooKeeper) {
    try {//  w  w  w  .  j  a  v a 2  s . com
        WatchedEvent event = new WatchedEvent(Watcher.Event.EventType.None, Watcher.Event.KeeperState.Expired,
                null);

        ClientCnxn clientCnxn = (ClientCnxn) cnxnField.get(zooKeeper);
        Object eventThread = eventThreadField.get(clientCnxn);
        queueEventMethod.invoke(eventThread, event);
        queueEventOfDeathMethod.invoke(eventThread);
        stateField.set(clientCnxn, ZooKeeper.States.CLOSED);
        Object sendThread = sendThreadField.get(clientCnxn);
        Object clientCnxnSocket = getClientCnxnSocketMethod.invoke(sendThread);
        wakeupCnxnMethod.invoke(clientCnxnSocket);
    } catch (ReflectiveOperationException e) {
        throw new RuntimeException("Could not inject session expiration using reflection", e);
    }
}

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

License:Apache License

public void testInterfaceMonitor() throws KeeperException, InterruptedException {

    IMocksControl c = EasyMock.createNiceControl();

    BundleContext ctx = c.createMock(BundleContext.class);
    ZooKeeperDiscovery zkd = c.createMock(ZooKeeperDiscovery.class);

    ZooKeeper zk = c.createMock(ZooKeeper.class);
    EasyMock.expect(zk.getState()).andReturn(ZooKeeper.States.CONNECTED).anyTimes();

    EasyMock.expect(zkd.getZookeeper()).andReturn(zk).anyTimes();

    EndpointListenerTrackerCustomizer.Interest interest = new EndpointListenerTrackerCustomizer.Interest();

    String scope = "(myProp=test)";
    String interf = "es.schaaf.test";
    String node = Util.getZooKeeperPath(interf);

    final InterfaceDataMonitorListenerImpl idmli = c.createMock(InterfaceDataMonitorListenerImpl.class);

    InterfaceMonitor im = new InterfaceMonitor(zk, interf, interest, scope, ctx) {
        @Override/*from w  w  w.j a v a 2s  . c  om*/
        protected InterfaceDataMonitorListenerImpl createInterfaceDataMonitorListener(ZooKeeper zk, String intf,
                Interest zkd, String scope, BundleContext bctx) {
            return idmli;
        }
    };

    idmli.change();
    EasyMock.expectLastCall().once();

    zk.exists(EasyMock.eq(node), EasyMock.eq(im), EasyMock.eq(im), EasyMock.anyObject());
    EasyMock.expectLastCall().once();

    EasyMock.expect(zk.exists(EasyMock.eq(node), EasyMock.eq(false))).andReturn(new Stat()).anyTimes();

    EasyMock.expect(zk.getChildren(EasyMock.eq(node), EasyMock.eq(im))).andReturn(Collections.EMPTY_LIST)
            .once();

    c.replay();

    im.start();

    // simulate a zk callback
    WatchedEvent we = new WatchedEvent(EventType.NodeCreated, KeeperState.SyncConnected, node);
    im.process(we);

    c.verify();
}

From source file:org.apache.distributedlog.zk.TestZKWatcherManager.java

License:Apache License

@Test(timeout = 60000)
public void testRegisterUnregisterWatcher() throws Exception {
    ZKWatcherManager watcherManager = ZKWatcherManager.newBuilder().name("test-register-unregister-watcher")
            .zkc(null).statsLogger(NullStatsLogger.INSTANCE).build();
    String path = "/test-register-unregister-watcher";
    final List<WatchedEvent> events = new LinkedList<WatchedEvent>();
    final CountDownLatch latch = new CountDownLatch(2);
    Watcher watcher = new Watcher() {
        @Override/* w w  w .java2 s. c om*/
        public void process(WatchedEvent event) {
            events.add(event);
            latch.countDown();
        }
    };
    watcherManager.registerChildWatcher(path, watcher);

    // fire the event
    WatchedEvent event0 = new WatchedEvent(Watcher.Event.EventType.NodeCreated,
            Watcher.Event.KeeperState.SyncConnected, path);
    WatchedEvent event1 = new WatchedEvent(Watcher.Event.EventType.None,
            Watcher.Event.KeeperState.SyncConnected, path);
    WatchedEvent event2 = new WatchedEvent(Watcher.Event.EventType.NodeChildrenChanged,
            Watcher.Event.KeeperState.SyncConnected, path);
    watcher.process(event1);
    watcher.process(event2);

    latch.await();

    assertEquals(2, events.size());
    assertEquals(event1, events.get(0));
    assertEquals(event2, events.get(1));

    // unregister watcher
    watcherManager.unregisterChildWatcher(path, watcher, true);
    // unregister gauges
    watcherManager.unregisterGauges();
    assertEquals(0, watcherManager.childWatches.size());
}

From source file:org.apache.helix.ZkTestHelper.java

License:Apache License

/**
 * Simulate a zk state change by calling {@link ZkClient#process(WatchedEvent)} directly
 *//* ww w .  j  ava 2  s. c  om*/
public static void simulateZkStateDisconnected(ZkClient client) {
    WatchedEvent event = new WatchedEvent(EventType.None, KeeperState.Disconnected, null);
    client.process(event);
}

From source file:org.apache.niolex.zookeeper.core.ZKConnectorExceTest.java

License:Apache License

@Test
@Order(0)//from w w  w  .  j  a v  a2  s.  c om
public void testProcessEvent() throws Exception {
    WatchedEvent event = new WatchedEvent(EventType.NodeCreated, KeeperState.Expired, "/a/ab/cc");
    ZKC.addAuthInfo("abc", "lex");
    ZKC.process(event);
    event = new WatchedEvent(EventType.NodeCreated, KeeperState.Disconnected, "/a/ab/cc");
    ZKC.process(event);
    event = new WatchedEvent(EventType.NodeCreated, KeeperState.AuthFailed, "/a/ab/cc");
    ZKC.process(event);
}

From source file:org.apache.niolex.zookeeper.watcher.CommonRecoverableWatcherTest.java

License:Apache License

@Test
public void testCommonRecoverableWatcher() throws Exception {
    WatchedEvent event = new WatchedEvent(EventType.NodeCreated, KeeperState.AuthFailed, "/a/ab/cc");
    wcl.process(event);/*  w  w  w .  j ava 2 s .  c om*/
    verify(listn, never()).onDataChange(any(byte[].class));
    verify(listn, never()).onChildrenChange(any(List.class));
    verify(zk, never()).getData(any(String.class), any(Watcher.class), any(Stat.class));
    verify(zk, never()).getChildren(any(String.class), any(Watcher.class));
}

From source file:org.apache.niolex.zookeeper.watcher.CommonRecoverableWatcherTest.java

License:Apache License

@Test
public void testCommonRecoverableWatchera() throws Exception {
    WatchedEvent event = new WatchedEvent(EventType.NodeCreated, KeeperState.AuthFailed, "/a/ab/cc");
    wda.process(event);//from  ww  w  .j a va2s  .  c om
    verify(listn, never()).onDataChange(any(byte[].class));
    verify(listn, never()).onChildrenChange(any(List.class));
    verify(zk, never()).getData(any(String.class), any(Watcher.class), any(Stat.class));
    verify(zk, never()).getChildren(any(String.class), any(Watcher.class));
}

From source file:org.apache.niolex.zookeeper.watcher.CommonRecoverableWatcherTest.java

License:Apache License

@Test
public void testProcess() throws Exception {
    WatchedEvent event = new WatchedEvent(EventType.NodeChildrenChanged, KeeperState.AuthFailed, "/a/ab/cc");
    wcl.process(event);/*from  www . j a  va  2  s  .c om*/
    verify(listn, never()).onDataChange(any(byte[].class));
    verify(listn, times(1)).onChildrenChange(any(List.class));
    verify(zk, never()).getData(any(String.class), any(Watcher.class), any(Stat.class));
    verify(zk, times(1)).getChildren(any(String.class), any(Watcher.class));
}