Package org.apache.hadoop.ha

Enum HAServiceProtocol.HAServiceState

java.lang.Object

java.lang.Enum<HAServiceProtocol.HAServiceState>

org.apache.hadoop.ha.HAServiceProtocol.HAServiceState

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<HAServiceProtocol.HAServiceState>

Enclosing interface:

HAServiceProtocol

public static enum HAServiceProtocol.HAServiceState
extends java.lang.Enum<HAServiceProtocol.HAServiceState>

An HA service may be in active or standby state. During startup, it is in an unknown INITIALIZING state. During shutdown, it is in the STOPPING state and can no longer return to active/standby states.

Enum Constant Summary

Enum Constants

Enum Constant	Description
ACTIVE
INITIALIZING
OBSERVER
STANDBY
STOPPING

Method Summary

Modifier and Type	Method	Description
java.lang.String	toString()
static HAServiceProtocol.HAServiceState	valueOf(java.lang.String name)	Returns the enum constant of this type with the specified name.
static HAServiceProtocol.HAServiceState[]	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, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

INITIALIZING

public static final HAServiceProtocol.HAServiceState INITIALIZING

ACTIVE

public static final HAServiceProtocol.HAServiceState ACTIVE

STANDBY

public static final HAServiceProtocol.HAServiceState STANDBY

OBSERVER

public static final HAServiceProtocol.HAServiceState OBSERVER

STOPPING

public static final HAServiceProtocol.HAServiceState STOPPING

Method Detail

values

public static HAServiceProtocol.HAServiceState[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (HAServiceProtocol.HAServiceState c : HAServiceProtocol.HAServiceState.values())
    System.out.println(c);

Returns:

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

valueOf

public static HAServiceProtocol.HAServiceState valueOf(java.lang.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:

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

java.lang.NullPointerException - if the argument is null

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Enum<HAServiceProtocol.HAServiceState>