org.apache.hadoop.hbase.zookeeper

类 RegionServerTracker

java.lang.Object

org.apache.hadoop.hbase.zookeeper.ZooKeeperListener

org.apache.hadoop.hbase.zookeeper.RegionServerTracker

@InterfaceAudience.Private
public class RegionServerTracker
extends ZooKeeperListener

Tracks the online region servers via ZK.

Handling of new RSs checking in is done via RPC. This class is only responsible for watching for expired nodes. It handles listening for changes in the RS node list and watching each node.

If an RS node gets deleted, this automatically handles calling of ServerManager.expireServer(ServerName)

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
RegionServerTracker(ZooKeeperWatcher watcher, MasterServices server, ServerManager serverManager)

方法概要

方法

限定符和类型	方法和说明
List<ServerName>	getOnlineServers() Gets the online servers.
org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.RegionServerInfo	getRegionServerInfo(ServerName sn)
void	nodeChildrenChanged(String path)
void	nodeDeleted(String path)
void	start() Starts the tracking of online RegionServers.

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

getWatcher, nodeCreated, 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

RegionServerTracker

public RegionServerTracker(ZooKeeperWatcher watcher,
                   MasterServices server,
                   ServerManager serverManager)

方法详细资料

start

public void start()
           throws org.apache.zookeeper.KeeperException,
                  IOException

Starts the tracking of online RegionServers.

All RSs will be tracked after this method is called.

抛出:

org.apache.zookeeper.KeeperException

IOException

nodeDeleted

public void nodeDeleted(String path)

覆盖:

nodeDeleted 在类中 ZooKeeperListener

nodeChildrenChanged

public void nodeChildrenChanged(String path)

覆盖:

nodeChildrenChanged 在类中 ZooKeeperListener

getRegionServerInfo

public org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.RegionServerInfo getRegionServerInfo(ServerName sn)

getOnlineServers

public List<ServerName> getOnlineServers()

Gets the online servers.

返回:

list of online servers