org.apache.hadoop.hbase.zookeeper

类 ZKClusterId

java.lang.Object

org.apache.hadoop.hbase.zookeeper.ZKClusterId

@InterfaceAudience.Private
public class ZKClusterId
extends Object

Publishes and synchronizes a unique identifier specific to a given HBase cluster. The stored identifier is read from the file system by the active master on startup, and is subsequently available to all watchers (including clients).

构造器概要

构造器

构造器和说明
ZKClusterId(ZooKeeperWatcher watcher, Abortable abortable)

方法概要

方法

限定符和类型	方法和说明
String	getId()
static UUID	getUUIDForCluster(ZooKeeperWatcher zkw) Get the UUID for the provided ZK watcher.
boolean	hasId()
static String	readClusterIdZNode(ZooKeeperWatcher watcher)
static void	setClusterId(ZooKeeperWatcher watcher, ClusterId id)

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

ZKClusterId

public ZKClusterId(ZooKeeperWatcher watcher,
           Abortable abortable)

方法详细资料

hasId

public boolean hasId()

getId

public String getId()

readClusterIdZNode

public static String readClusterIdZNode(ZooKeeperWatcher watcher)
                                 throws org.apache.zookeeper.KeeperException

抛出:

org.apache.zookeeper.KeeperException

setClusterId

public static void setClusterId(ZooKeeperWatcher watcher,
                ClusterId id)
                         throws org.apache.zookeeper.KeeperException

抛出:

org.apache.zookeeper.KeeperException

getUUIDForCluster

public static UUID getUUIDForCluster(ZooKeeperWatcher zkw)
                              throws org.apache.zookeeper.KeeperException

Get the UUID for the provided ZK watcher. Doesn't handle any ZK exceptions

参数:

zkw - watcher connected to an ensemble

返回:

the UUID read from zookeeper

抛出:

org.apache.zookeeper.KeeperException