org.apache.hadoop.hbase.zookeeper

类 ZKLeaderManager

java.lang.Object

org.apache.hadoop.hbase.zookeeper.ZooKeeperListener

org.apache.hadoop.hbase.zookeeper.ZKLeaderManager

已过时。

Not used

@Deprecated
@InterfaceAudience.Private
public class ZKLeaderManager
extends ZooKeeperListener

Handles coordination of a single "leader" instance among many possible candidates. The first ZKLeaderManager to successfully create the given znode becomes the leader, allowing the instance to continue with whatever processing must be protected. Other ZKLeaderManager instances will wait to be notified of changes to the leader znode. If the current master instance fails, the ephemeral leader znode will be removed, and all waiting instances will be notified, with the race to claim the leader znode beginning all over again.

字段概要

从类继承的字段 org.apache.hadoop.hbase.zookeeper.ZooKeeperListener

watcher

构造器概要

构造器

构造器和说明
ZKLeaderManager(ZooKeeperWatcher watcher, String leaderZNode, byte[] identifier, Stoppable candidate) 已过时。

方法概要

方法

限定符和类型	方法和说明
boolean	hasLeader() 已过时。
void	nodeCreated(String path) 已过时。 Called when a new node has been created.
void	nodeDeleted(String path) 已过时。 Called when a node has been deleted
void	start() 已过时。
void	stepDownAsLeader() 已过时。 Removes the leader znode, if it is currently claimed by this instance.
void	waitToBecomeLeader() 已过时。 Blocks until this instance has claimed the leader ZNode in ZooKeeper

从类继承的方法 org.apache.hadoop.hbase.zookeeper.ZooKeeperListener

getWatcher, nodeChildrenChanged, nodeDataChanged

从类继承的方法 java.lang.Object

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

构造器详细资料

ZKLeaderManager

public ZKLeaderManager(ZooKeeperWatcher watcher,
               String leaderZNode,
               byte[] identifier,
               Stoppable candidate)

已过时。

方法详细资料

start

public void start()

已过时。

nodeCreated

public void nodeCreated(String path)

已过时。

从类复制的说明: ZooKeeperListener

Called when a new node has been created.

覆盖:

nodeCreated 在类中 ZooKeeperListener

参数:

path - full path of the new node

nodeDeleted

public void nodeDeleted(String path)

已过时。

从类复制的说明: ZooKeeperListener

Called when a node has been deleted

覆盖:

nodeDeleted 在类中 ZooKeeperListener

参数:

path - full path of the deleted node

waitToBecomeLeader

public void waitToBecomeLeader()

已过时。

Blocks until this instance has claimed the leader ZNode in ZooKeeper

stepDownAsLeader

public void stepDownAsLeader()

已过时。

Removes the leader znode, if it is currently claimed by this instance.

hasLeader

public boolean hasLeader()

已过时。