com.sun.enterprise.ee.cms.core
Enum GroupManagementService.MemberType

java.lang.Object
  java.lang.Enum<GroupManagementService.MemberType>
      com.sun.enterprise.ee.cms.core.GroupManagementService.MemberType

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<GroupManagementService.MemberType>

Enclosing interface:

GroupManagementService

public static enum GroupManagementService.MemberType
extends java.lang.Enum<GroupManagementService.MemberType>

Members joining the group should be one of the following types. Core members are ones whose failure is a material event to the group, Spectators are those whose failure is not a material event to other group members. A Watchdog member of the group can report to the group that a member of the group has failed. The failure of a Watchdog is not a material event to the other group members. In order to lower overhead for a WATCHDOG, Distributed State Cache management is disabled for a WATCHDOG member. Additionally, a WATCHDOG member does not receive any GMS event notifications nor can it ever be the MASTER of a GMS group.

Motivation for WATCHDOG member is to enable Framework Agents that control and monitor the runtime status of GMS members to be able to report failures to GMS when they are detected. If a Framework Agent runs on same machine as processes it monitors, it can detect failure sooner and more reliably than heartbeat based failure detection can. A WATCHDOG member can lessen the amount of time that GMS takes to notify a group that a member has failed.

Enum Constant Summary

CORE

SPECTATOR

WATCHDOG

Method Summary

static GroupManagementService.MemberType	valueOf(java.lang.String name) Returns the enum constant of this type with the specified name.
static GroupManagementService.MemberType[]	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 Detail

CORE

public static final GroupManagementService.MemberType CORE

SPECTATOR

public static final GroupManagementService.MemberType SPECTATOR

WATCHDOG

public static final GroupManagementService.MemberType WATCHDOG

Method Detail

values

public static GroupManagementService.MemberType[] 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 (GroupManagementService.MemberType c : GroupManagementService.MemberType.values())
    System.out.println(c);

Returns:

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

valueOf

public static GroupManagementService.MemberType 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