Example usage for org.apache.zookeeper Watcher interface-usage

List of usage examples for org.apache.zookeeper Watcher interface-usage

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Introduction

In this page you can find the example usage for org.apache.zookeeper Watcher interface-usage.

Usage

From source file org.apache.hoya.tools.ZKIntegration.java

public class ZKIntegration implements Watcher {

    /**
     * Base path for services
     */
    public static String ZK_SERVICES = "services";

From source file org.apache.niolex.zookeeper.core.ZKConnector.java

/**
 * The main Zookeeper connector, manage zookeeper and retry connection.
 * We encapsulate the common add, update, delete and watch operations for Zookeeper.
 * <br>
 * If user want to operate on the raw Zookeeper, use {@link #zooKeeper()}.
 *

From source file org.apache.niolex.zookeeper.watcher.RecoverableWatcher.java

/**
 * The interface extends the standard ZK watcher, and add a new
 * method for recover watcher when connection with ZK expired.
 *
 * @author <a href="mailto:xiejiyun@gmail.com">Xie, Jiyun</a>
 * @version 1.0.5

From source file org.apache.pulsar.zookeeper.ZooKeeperCache.java

/**
 * Per ZK client ZooKeeper cache supporting ZNode data and children list caches. A cache entry is identified, accessed
 * and invalidated by the ZNode path. For the data cache, ZNode data parsing is done at request time with the given
 * {@link Deserializer} argument.
 *
 * @param <T>

From source file org.apache.pulsar.zookeeper.ZooKeeperChildrenCache.java

/**
 * This class keeps a cache of the children for several z-nodes and updates it whenever it's changed on zookeeper.
 */
public class ZooKeeperChildrenCache implements Watcher, CacheUpdater<Set<String>> {
    private static final Logger LOG = LoggerFactory.getLogger(ZooKeeperChildrenCache.class);

From source file org.apache.pulsar.zookeeper.ZooKeeperDataCache.java

/**
 * Provides a generic cache for reading objects stored in zookeeper.
 *
 * Maintains the objects already serialized in memory and sets watches to receive changes notifications.
 *
 * @param <T>

From source file org.apache.pulsar.zookeeper.ZooKeeperSessionWatcher.java

/**
 * A ZooKeeper watcher for the Pulsar instance.
 *
 * Monitor the ZK session state every few seconds. If the session is not in Connected state for a while, we will kill
 * the process before the session is supposed to expire
 */

From source file org.apache.s4.comm.core.DefaultWatcher.java

public class DefaultWatcher implements Watcher {

    public static List<KeeperState> interestingStates = new ArrayList<KeeperState>();
    static {
        interestingStates.add(KeeperState.Expired);
        interestingStates.add(KeeperState.SyncConnected);

From source file org.apache.s4.core.triggers.TriggerablePE.java

public class TriggerablePE extends ProcessingElement implements Watcher {

    private ZooKeeper zk;

    public TriggerablePE() {
    }

From source file org.apache.s4.wordcount.WordClassifierPE.java

public class WordClassifierPE extends ProcessingElement implements Watcher {

    TreeMap<String, Integer> counts = new TreeMap<String, Integer>();
    private int counter;
    transient private ZooKeeper zk;