org.apache.hadoop.hbase.master.assignment

Class RegionStates.RegionStateNode

java.lang.Object

org.apache.hadoop.hbase.master.assignment.RegionStates.RegionStateNode

All Implemented Interfaces:

Comparable<RegionStates.RegionStateNode>

Enclosing class:

RegionStates

public static class RegionStates.RegionStateNode
extends Object
implements Comparable<RegionStates.RegionStateNode>

Current Region State. In-memory only. Not persisted.

Field Summary

Fields

Modifier and Type	Field and Description
private ProcedureEvent<?>	event
private ServerName	lastHost
private long	lastUpdate Updated whenever a call to setRegionLocation(ServerName) or #setState(State, State...).
private long	openSeqNum
private RegionTransitionProcedure	procedure
private RegionInfo	regionInfo
private ServerName	regionLocation
private RegionState.State	state A Region-in-Transition (RIT) moves through states.

Constructor Summary

Constructors

Constructor and Description
RegionStateNode(RegionInfo regionInfo)

Method Summary

Modifier and Type	Method and Description
int	compareTo(RegionStates.RegionStateNode other)
boolean	equals(Object other)
int	getFormatVersion()
ServerName	getLastHost()
long	getLastUpdate()
long	getOpenSeqNum()
RegionTransitionProcedure	getProcedure()
ProcedureEvent<?>	getProcedureEvent()
RegionInfo	getRegionInfo()
ServerName	getRegionLocation()
RegionState.State	getState()
TableName	getTable()
int	hashCode()
boolean	isInState(RegionState.State... expected)
boolean	isInTransition()
boolean	isStuck()
boolean	isSystemTable()
ServerName	offline() Put region into OFFLINE mode (set state and clear location).
void	setLastHost(ServerName serverName)
void	setOpenSeqNum(long seqId)
boolean	setProcedure(RegionTransitionProcedure proc)
ServerName	setRegionLocation(ServerName serverName)
boolean	setState(RegionState.State update, RegionState.State... expected)
String	toDescriptiveString()
RegionState	toRegionState()
String	toShortString()
String	toString()
void	transitionState(RegionState.State update, RegionState.State... expected) Set new RegionState.State but only if currently in expected State (if not, throw UnexpectedStateException.
boolean	unsetProcedure(RegionTransitionProcedure proc)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

regionInfo

private final RegionInfo regionInfo

event

private final ProcedureEvent<?> event

procedure

private volatile RegionTransitionProcedure procedure

regionLocation

private volatile ServerName regionLocation

lastHost

private volatile ServerName lastHost

state

private volatile RegionState.State state

A Region-in-Transition (RIT) moves through states. See RegionState.State for complete list. A Region that is opened moves from OFFLINE => OPENING => OPENED.

lastUpdate

private volatile long lastUpdate

Updated whenever a call to setRegionLocation(ServerName) or #setState(State, State...).

openSeqNum

private volatile long openSeqNum

Constructor Detail

RegionStateNode

public RegionStateNode(RegionInfo regionInfo)

Method Detail

setState

public boolean setState(RegionState.State update,
                        RegionState.State... expected)

Parameters:

update - new region state this node should be assigned.

expected - current state should be in this given list of expected states

Returns:

true, if current state is in expected list; otherwise false.

offline

public ServerName offline()

Put region into OFFLINE mode (set state and clear location).

Returns:

Last recorded server deploy

transitionState

public void transitionState(RegionState.State update,
                            RegionState.State... expected)
                     throws UnexpectedStateException

Set new RegionState.State but only if currently in expected State (if not, throw UnexpectedStateException.

Throws:

UnexpectedStateException

isInState

public boolean isInState(RegionState.State... expected)

isStuck

public boolean isStuck()

isInTransition

public boolean isInTransition()

getLastUpdate

public long getLastUpdate()

setLastHost

public void setLastHost(ServerName serverName)

setOpenSeqNum

public void setOpenSeqNum(long seqId)

setRegionLocation

public ServerName setRegionLocation(ServerName serverName)

setProcedure

public boolean setProcedure(RegionTransitionProcedure proc)

unsetProcedure

public boolean unsetProcedure(RegionTransitionProcedure proc)

getProcedure

public RegionTransitionProcedure getProcedure()

getProcedureEvent

public ProcedureEvent<?> getProcedureEvent()

getRegionInfo

public RegionInfo getRegionInfo()

getTable

public TableName getTable()

isSystemTable

public boolean isSystemTable()

getLastHost

public ServerName getLastHost()

getRegionLocation

public ServerName getRegionLocation()

getState

public RegionState.State getState()

getOpenSeqNum

public long getOpenSeqNum()

getFormatVersion

public int getFormatVersion()

toRegionState

public RegionState toRegionState()

compareTo

public int compareTo(RegionStates.RegionStateNode other)

Specified by:

compareTo in interface Comparable<RegionStates.RegionStateNode>

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object other)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

toShortString

public String toShortString()

toDescriptiveString

public String toDescriptiveString()