Package org.apache.zookeeper

Class WatchedEvent

java.lang.Object

org.apache.zookeeper.WatchedEvent

@Public
public class WatchedEvent
extends Object

A WatchedEvent represents a change on the ZooKeeper that a Watcher is able to respond to. The WatchedEvent includes exactly what happened, the current state of the ZooKeeper, and the path of the znode that was involved in the event.

Field Summary

Fields

Modifier and Type	Field	Description
static long	NO_ZXID

Constructor Summary

Constructors

Constructor	Description
WatchedEvent(WatcherEvent eventMessage, long zxid)	Convert a WatcherEvent sent over the wire into a full-fledged WatchedEvent
WatchedEvent(Watcher.Event.EventType eventType, Watcher.Event.KeeperState keeperState, String path)	Create a WatchedEvent with specified type, state and path
WatchedEvent(Watcher.Event.EventType eventType, Watcher.Event.KeeperState keeperState, String path, long zxid)	Create a WatchedEvent with specified type, state, path and zxid

Method Summary

Modifier and Type	Method	Description
String	getPath()
Watcher.Event.KeeperState	getState()
Watcher.Event.EventType	getType()
WatcherEvent	getWrapper()	Convert WatchedEvent to type that can be sent over network
long	getZxid()	Returns the zxid of the transaction that triggered this watch if it is of one of the following types: Watcher.Event.EventType.NodeCreated Watcher.Event.EventType.NodeDeleted Watcher.Event.EventType.NodeDataChanged Watcher.Event.EventType.NodeChildrenChanged Otherwise, returns -1L.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

NO_ZXID

public static final long NO_ZXID

See Also:

Constant Field Values

Constructor Detail

WatchedEvent

public WatchedEvent(Watcher.Event.EventType eventType,
                    Watcher.Event.KeeperState keeperState,
                    String path,
                    long zxid)

Create a WatchedEvent with specified type, state, path and zxid

WatchedEvent

public WatchedEvent(Watcher.Event.EventType eventType,
                    Watcher.Event.KeeperState keeperState,
                    String path)

Create a WatchedEvent with specified type, state and path

WatchedEvent

public WatchedEvent(WatcherEvent eventMessage,
                    long zxid)

Convert a WatcherEvent sent over the wire into a full-fledged WatchedEvent

Method Detail

getState

public Watcher.Event.KeeperState getState()

getType

public Watcher.Event.EventType getType()

getPath

public String getPath()

getZxid

public long getZxid()

Returns the zxid of the transaction that triggered this watch if it is of one of the following types:

• Watcher.Event.EventType.NodeCreated
• Watcher.Event.EventType.NodeDeleted
• Watcher.Event.EventType.NodeDataChanged
• Watcher.Event.EventType.NodeChildrenChanged

Otherwise, returns -1L. Note that -1L is also returned by old servers that do not support this feature.

toString

public String toString()

Overrides:

toString in class Object

getWrapper

public WatcherEvent getWrapper()

Convert WatchedEvent to type that can be sent over network