Package org.apache.hadoop.ozone.container.common.statemachine

Enum DatanodeStateMachine.DatanodeStates

java.lang.Object

java.lang.Enum<DatanodeStateMachine.DatanodeStates>

org.apache.hadoop.ozone.container.common.statemachine.DatanodeStateMachine.DatanodeStates

All Implemented Interfaces:

Serializable, Comparable<DatanodeStateMachine.DatanodeStates>

Enclosing class:

DatanodeStateMachine

public static enum DatanodeStateMachine.DatanodeStates
extends Enum<DatanodeStateMachine.DatanodeStates>

States that a datanode can be in. GetNextState will move this enum from getInitState to getLastState.

Enum Constant Summary

Enum Constants

Enum Constant	Description
INIT
RUNNING
SHUTDOWN

Method Summary

Modifier and Type	Method	Description
static DatanodeStateMachine.DatanodeStates	getInitState()	Returns the first State.
static DatanodeStateMachine.DatanodeStates	getLastState()	The last state of endpoint states.
DatanodeStateMachine.DatanodeStates	getNextState()	Returns the next logical state that endPoint should move to.
int	getValue()	returns the numeric value associated with the endPoint.
boolean	isTransitionAllowedTo(DatanodeStateMachine.DatanodeStates newState)
static DatanodeStateMachine.DatanodeStates	valueOf(String name)	Returns the enum constant of this type with the specified name.
static DatanodeStateMachine.DatanodeStates[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

INIT

public static final DatanodeStateMachine.DatanodeStates INIT

RUNNING

public static final DatanodeStateMachine.DatanodeStates RUNNING

SHUTDOWN

public static final DatanodeStateMachine.DatanodeStates SHUTDOWN

Method Details

values

public static DatanodeStateMachine.DatanodeStates[] values()

Returns an array containing the constants of this enum type, in the order they are declared.

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static DatanodeStateMachine.DatanodeStates valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

getInitState

public static DatanodeStateMachine.DatanodeStates getInitState()

Returns the first State.

Returns:

First State.

getLastState

public static DatanodeStateMachine.DatanodeStates getLastState()

The last state of endpoint states.

Returns:

last state.

getValue

public int getValue()

returns the numeric value associated with the endPoint.

Returns:

int.

getNextState

public DatanodeStateMachine.DatanodeStates getNextState()

Returns the next logical state that endPoint should move to. This function assumes the States are sequentially numbered.

Returns:

NextState.

isTransitionAllowedTo

public boolean isTransitionAllowedTo(DatanodeStateMachine.DatanodeStates newState)