org.apache.hadoop.hbase.master

Class MasterStateStore

java.lang.Object

org.apache.hadoop.hbase.master.MasterStateStore

Direct Known Subclasses:

BooleanStateStore

@InterfaceAudience.Private
public abstract class MasterStateStore
extends Object

A state storage which stores the state in master local region.

We used to store some persistent state on zookeeper, so here we provide the ability to migrate the state from zookeeper.

Since parsing the state may introduce some extra overhead, we make this class abstract and the get and set state methods protected. Sub classes should store their state in decoded format to save the extra parsing overhead.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	MasterStateStore(MasterRegion masterRegion, String stateName, ZKWatcher watcher, String zkPath)

Method Summary

Modifier and Type	Method and Description
protected byte[]	getState()
protected void	setState(byte[] state)

Methods inherited from class java.lang.Object

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

Constructor Detail

MasterStateStore

protected MasterStateStore(MasterRegion masterRegion,
                           String stateName,
                           ZKWatcher watcher,
                           String zkPath)
                    throws IOException,
                           org.apache.zookeeper.KeeperException

Throws:

IOException

org.apache.zookeeper.KeeperException

Method Detail

getState

protected final byte[] getState()
                         throws IOException

Throws:

IOException

setState

protected final void setState(byte[] state)
                       throws IOException

Throws:

IOException