Package org.apache.hadoop.hbase.zookeeper

Class MasterMaintenanceModeTracker

java.lang.Object

org.apache.hadoop.hbase.zookeeper.ZKListener

org.apache.hadoop.hbase.zookeeper.MasterMaintenanceModeTracker

@Private
public class MasterMaintenanceModeTracker
extends ZKListener

Tracks the master Maintenance Mode via ZK. Unused. Used to be set by hbck to prevent concurrent splits/merges, but those use PV2 now and HBCK2 uses it's own service, so no longer an issue. Left in, in case we need to use this for the incomplete parts of HBCK2...

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	hasChildren

Fields inherited from class org.apache.hadoop.hbase.zookeeper.ZKListener

watcher

Constructor Summary

Constructors

Constructor	Description
MasterMaintenanceModeTracker(ZKWatcher watcher)

Method Summary

Modifier and Type	Method	Description
boolean	isInMaintenanceMode()
void	nodeChildrenChanged(String path)	Called when an existing node has a child node added or removed.
void	nodeCreated(String path)	Called when a new node has been created.
void	nodeDeleted(String path)	Called when a node has been deleted
void	start()	Starts the tracking of whether master is in Maintenance Mode.
private void	update()
private void	update(String path)

Methods inherited from class org.apache.hadoop.hbase.zookeeper.ZKListener

getWatcher, nodeDataChanged

Methods inherited from class java.lang.Object

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

Field Details

hasChildren

private boolean hasChildren

Constructor Details

MasterMaintenanceModeTracker

public MasterMaintenanceModeTracker(ZKWatcher watcher)

Method Details

isInMaintenanceMode

public boolean isInMaintenanceMode()

update

private void update(String path)

update

private void update()

start

public void start()

Starts the tracking of whether master is in Maintenance Mode.

nodeCreated

public void nodeCreated(String path)

Description copied from class: ZKListener

Called when a new node has been created.

Overrides:

nodeCreated in class ZKListener

Parameters:

path - full path of the new node

nodeDeleted

public void nodeDeleted(String path)

Description copied from class: ZKListener

Called when a node has been deleted

Overrides:

nodeDeleted in class ZKListener

Parameters:

path - full path of the deleted node

nodeChildrenChanged

public void nodeChildrenChanged(String path)

Description copied from class: ZKListener

Called when an existing node has a child node added or removed.

Overrides:

nodeChildrenChanged in class ZKListener

Parameters:

path - full path of the node whose children have changed