Example usage for org.apache.zookeeper WatchedEvent getState

Introduction

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

Prototype

public KeeperState getState()

Source Link

Usage

From source file:org.apache.whirr.service.cdh.integration.CdhZooKeeperServiceTest.java

License:Apache License

@Test(timeout = TestConstants.ITEST_TIMEOUT)
public void test() throws Exception {
    class ConnectionWatcher implements Watcher {

        private ZooKeeper zk;
        private CountDownLatch latch = new CountDownLatch(1);

        public void connect(String hosts) throws IOException, InterruptedException {
            zk = new ZooKeeper(hosts, 5000, this);
            latch.await();/*from  www  .ja va 2s.  c o  m*/
        }

        public ZooKeeper getZooKeeper() {
            return zk;
        }

        @Override
        public void process(WatchedEvent event) {
            if (event.getState() == KeeperState.SyncConnected) {
                latch.countDown();
            }
        }

        public void close() throws InterruptedException {
            if (zk != null) {
                zk.close();
            }
        }

    }

    String path = "/data";
    String data = "Hello";
    ConnectionWatcher watcher = new ConnectionWatcher();
    watcher.connect(hosts);
    watcher.getZooKeeper().create(path, data.getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
    watcher.close();

    watcher = new ConnectionWatcher();
    watcher.connect(hosts);
    byte[] actualData = watcher.getZooKeeper().getData(path, false, null);
    assertEquals(data, new String(actualData));
    watcher.close();
}

From source file:org.apache.whirr.service.zookeeper.ZooKeeperServiceTest.java

License:Apache License

@Test
public void test() throws Exception {
    class ConnectionWatcher implements Watcher {

        private ZooKeeper zk;
        private CountDownLatch latch = new CountDownLatch(1);

        public void connect(String hosts) throws IOException, InterruptedException {
            zk = new ZooKeeper(hosts, 5000, this);
            latch.await();/*  w w w  .  j a  va2  s .  c om*/
        }

        public ZooKeeper getZooKeeper() {
            return zk;
        }

        @Override
        public void process(WatchedEvent event) {
            if (event.getState() == KeeperState.SyncConnected) {
                latch.countDown();
            }
        }

        public void close() throws InterruptedException {
            if (zk != null) {
                zk.close();
            }
        }

    }

    String path = "/data";
    String data = "Hello";
    ConnectionWatcher watcher = new ConnectionWatcher();
    watcher.connect(cluster.getHosts());
    watcher.getZooKeeper().create(path, data.getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
    watcher.close();

    watcher = new ConnectionWatcher();
    watcher.connect(cluster.getHosts());
    byte[] actualData = watcher.getZooKeeper().getData(path, false, null);
    assertEquals(data, new String(actualData));
    watcher.close();
}

From source file:org.bboxdb.distribution.zookeeper.ZookeeperClient.java

License:Apache License

/**
 * Connect to zookeeper//ww w .  j  ava 2s .co  m
 */
@Override
public void init() {
    if (zookeeperHosts == null || zookeeperHosts.isEmpty()) {
        logger.warn("No Zookeeper hosts are defined, not connecting to zookeeper");
        return;
    }

    try {
        shutdownPending = false;

        final CountDownLatch connectLatch = new CountDownLatch(1);

        zookeeper = new ZooKeeper(generateConnectString(), ZOOKEEPER_SESSION_TIMEOUT, new Watcher() {
            @Override
            public void process(final WatchedEvent event) {
                if (event.getState() == Watcher.Event.KeeperState.SyncConnected) {
                    connectLatch.countDown();
                }
            }
        });

        boolean waitResult = connectLatch.await(ZOOKEEPER_CONNCT_TIMEOUT, TimeUnit.SECONDS);

        if (waitResult == false) {
            logger.warn("Unable to connect in " + ZOOKEEPER_CONNCT_TIMEOUT + " seconds");
            closeZookeeperConnectionNE();
            return;
        }

        createDirectoryStructureIfNeeded();

        registerInstanceIfNameWasSet();
    } catch (Exception e) {
        logger.warn("Got exception while connecting to zookeeper", e);
    }
}

From source file:org.cane.rpc.servicectrl.ServiceRegistry.java

License:Open Source License

/**
 * create connection to zookeeper server
 * @return//  ww w  . j  av a 2  s .c  o m
 */
private ZooKeeper connectZookeeperServer() {
    ZooKeeper zk = null;
    try {
        zk = new ZooKeeper(zookeeperAddress, ServiceConstant.SESSION_TIMEOUT, new Watcher() {

            @Override
            public void process(WatchedEvent event) {
                if (event.getState() == KeeperState.SyncConnected) {
                    latch.countDown();
                }
            }
        });
        latch.await();
    } catch (Exception e) {
        LOG.error("Can not connect given zookeeper server!", e);
    }
    return zk;
}

From source file:org.cloudata.core.commitlog.CommitLogServer.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    if (event.getType() == Event.EventType.None) {
        switch (event.getState()) {
        case SyncConnected:
            break;
        case Disconnected:
            LOG.warn("Disconnected:" + event);
            break;
        case Expired:
            LOG.info("Shutdown cause lock expired:" + event);
            stopCommitLogServer();//from  w w w  .j a  v  a2s.c  om
        }
    }
}

From source file:org.cloudata.core.master.CloudataMaster.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    if (event.getType() == Event.EventType.None) {
        switch (event.getState()) {
        case SyncConnected:
            break;
        case Disconnected:
            LOG.warn("Disconnected:" + event);
            break;
        case Expired:
            LOG.info("Shutdown cause lock expired:" + event);
            shutdown();/*  w  w  w .  j  a  v  a  2s.co  m*/
            break;
        }
    }
}

From source file:org.cloudata.core.tabletserver.TabletServer.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    if (event.getType() == Event.EventType.None) {
        switch (event.getState()) {
        case SyncConnected:
            break;
        case Disconnected:
            LOG.warn("Disconnected:" + event);
            break;
        case Expired:
            LOG.fatal("Shutdown cause lock expired:" + event);
            shutdown();/*www  . j  ava  2s .c  om*/
            break;
        }
    }
}

From source file:org.deeplearning4j.hadoop.util.HdfsLock.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    if (event.getState() == KeeperState.Expired) {
        zk = new ZookeeperBuilder().setHost(host).setPort(port).setWatcher(this).build();

    }//ww w. ja  v  a  2  s .c o  m
}

From source file:org.deeplearning4j.scaleout.zookeeper.ZookeeperBuilder.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    if (event.getState() == KeeperState.SyncConnected) {
        log.info("Synced");
    } else if (event.getState() == KeeperState.Disconnected) {
        keeper = build();// ww  w.j a v a  2 s .c  o m
    } else if (event.getState() == KeeperState.Expired) {
        keeper = build();
    }
    if (watcher != null)
        watcher.process(event);
    log.info("Processed event...");
}

From source file:org.deeplearning4j.scaleout.zookeeper.ZookeeperConfigurationRetriever.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    if (event.getState() == KeeperState.Expired) {
        keeper = new ZookeeperBuilder().setHost(host).setPort(port).setWatcher(this).build();

    }/*from w w w  .j ava 2 s.  c o  m*/
}