Package org.apache.hadoop.hbase.master

Class BooleanStateStore

java.lang.Object

org.apache.hadoop.hbase.master.MasterStateStore

org.apache.hadoop.hbase.master.BooleanStateStore

Direct Known Subclasses:

LoadBalancerStateStore, RegionNormalizerStateStore, ReplicationPeerModificationStateStore, SnapshotCleanupStateStore, SplitOrMergeStateStore.SwitchStateStore

@Private
public abstract class BooleanStateStore
extends MasterStateStore

Store a boolean state.

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	on

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
boolean	get()	Returns true if the flag is on, otherwise false
protected abstract boolean	parseFrom(byte[] bytes)
boolean	set(boolean on)	Set the flag on/off.
protected abstract byte[]	toByteArray(boolean on)

Methods inherited from class org.apache.hadoop.hbase.master.MasterStateStore

getState, setState

Methods inherited from class java.lang.Object

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

Field Details

on

private volatile boolean on

Constructor Details

BooleanStateStore

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

Throws:

IOException

org.apache.zookeeper.KeeperException

DeserializationException

Method Details

get

public boolean get()

Returns true if the flag is on, otherwise false

set

public boolean set(boolean on)
            throws IOException

Set the flag on/off.

Parameters:

on - true if the flag should be on, false otherwise

Returns:

returns the previous state

Throws:

IOException - if the operation fails

toByteArray

protected abstract byte[] toByteArray(boolean on)

parseFrom

protected abstract boolean parseFrom(byte[] bytes)
                              throws DeserializationException

Throws:

DeserializationException