Module org.cojen.tupl

Package org.cojen.tupl.repl

Enum Class Role

java.lang.Object

java.lang.Enum<Role>

org.cojen.tupl.repl.Role

All Implemented Interfaces:

Serializable, Comparable<Role>, Constable

public enum Role
extends Enum<Role>

Supported membership roles.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
NORMAL	Normal members receive replicated data, they can proxy writes, they provide consensus, and they can become the leader.
OBSERVER	Observers only receive replicated data.
PROXY	Proxy members receive replicated data, and they can proxy writes.
RESTORING	A restoring member is an observer which just joined the group and is receiving a snapshot.
STANDBY	Standby members receive replicated data, they can proxy writes, and they provide consensus.

Method Summary

Modifier and Type	Method	Description
static Role	valueOf(String name)	Returns the enum constant of this class with the specified name.
static Role[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

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

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

NORMAL

public static final Role NORMAL

Normal members receive replicated data, they can proxy writes, they provide consensus, and they can become the leader.

STANDBY

public static final Role STANDBY

Standby members receive replicated data, they can proxy writes, and they provide consensus. They can only become an interim leader, to permit a normal member to catch up. An interim leader doesn't accept any new writes.

PROXY

public static final Role PROXY

Proxy members receive replicated data, and they can proxy writes. They don't provide consensus, and they cannot become the leader.

OBSERVER

public static final Role OBSERVER

Observers only receive replicated data. They don't proxy writes, they don't provide consensus, and they cannot become the leader.

RESTORING

public static final Role RESTORING

A restoring member is an observer which just joined the group and is receiving a snapshot. If the restore fails, the member is automatically removed from the group.

Method Details

values

public static Role[] values()

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

Returns:

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

valueOf

public static Role valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (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 class has no constant with the specified name

NullPointerException - if the argument is null