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.hadoop.hbase.master.ZKUnassignedWatcher.java

/**
 * Watches the UNASSIGNED znode in ZK for the master, and handles all events
 * relating to region transitions.
 */
public class ZKUnassignedWatcher implements Watcher {
    private static final Log LOG = LogFactory.getLog(ZKUnassignedWatcher.class);

From source file org.apache.hadoop.hbase.stargate.RESTServlet.java

/**
 * Singleton class encapsulating global REST servlet state and functions.
 */
public class RESTServlet extends ServletAdaptor implements Constants, Watcher {

    private static final Log LOG = LogFactory.getLog(RESTServlet.class);

From source file org.apache.hadoop.hbase.zookeeper.EmptyWatcher.java

/**
 * An empty ZooKeeper watcher
 */
@InterfaceAudience.Private
public class EmptyWatcher implements Watcher {
    // Used in this package but also by tests so needs to be public

From source file org.apache.hadoop.hbase.zookeeper.lock.DeletionWatcher.java

/**
 * A ZooKeeper watcher meant to detect deletions of ZNodes.
 */
public class DeletionWatcher implements Watcher {

    private static final Log LOG = LogFactory.getLog(DeletionWatcher.class);

From source file org.apache.hadoop.hbase.zookeeper.PendingWatcher.java

/**
 * Placeholder of a watcher which might be triggered before the instance is not yet created.
 * <p>
 * {@code ZooKeeper} starts its event thread within its constructor (and that is an anti-pattern),
 * and the watcher passed to the constructor might be called back by the event thread
 * before you get the instance of {@code ZooKeeper} from the constructor.

From source file org.apache.hadoop.hbase.zookeeper.WatcherWrapper.java

/**
 * Place-holder Watcher.
 * Does nothing currently.
 */
public class WatcherWrapper implements Watcher {
    private final Watcher otherWatcher;

From source file org.apache.hadoop.hbase.zookeeper.ZKWatcher.java

/**
 * Acts as the single ZooKeeper Watcher.  One instance of this is instantiated
 * for each Master, RegionServer, and client process.
 *
 * <p>This is the only class that implements {@link Watcher}.  Other internal
 * classes which need to be notified of ZooKeeper events must register with

From source file org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.java

/**
 * Acts as the single ZooKeeper Watcher.  One instance of this is instantiated
 * for each Master, RegionServer, and client process.
 *
 * <p>This is the only class that implements {@link Watcher}.  Other internal
 * classes which need to be notified of ZooKeeper events must register with

From source file org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.java

/**
 * Wraps a ZooKeeper instance and adds HBase specific functionality.
 *
 * This class provides methods to:
 * - read/write/delete the root region location in ZooKeeper.
 * - set/check out of safe mode flag.

From source file org.apache.hadoop.hdfs.server.namenode.bookkeeper.zk.ConnectionWatcher.java

/**
 * Implementation of {@link Watcher} that waits for a connection to be
 * established to ZooKeeper.
 */
public class ConnectionWatcher implements Watcher {