Class PromoteNewestMemberOnCoordinatorLeave

java.lang.Object

org.jgroups.protocols.pbcast.GMS.DefaultMembershipPolicy

org.jgroups.util.PromoteNewestMemberOnCoordinatorLeave

All Implemented Interfaces:

MembershipChangePolicy

public class PromoteNewestMemberOnCoordinatorLeave
extends GMS.DefaultMembershipPolicy

MembershipChangePolicy which promotes the newest member when the existing coordinator leaves. This minimizes the number of coordinator changes; during a rolling restart there will be only a single coordinator change.

Since:

5.5.1

Author:

Christian Fredriksson

Constructor Summary

Constructors

Constructor	Description
PromoteNewestMemberOnCoordinatorLeave()

Method Summary

Modifier and Type	Method	Description
List<Address>	getNewMembership(Collection<Address> currentMembers, Collection<Address> joiners, Collection<Address> leavers, Collection<Address> suspects)	Takes the existing membership list and removes suspected and left members, then adds new members to the end of the list

Methods inherited from class GMS.DefaultMembershipPolicy

getNewMembership, getNewMembershipOld

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

PromoteNewestMemberOnCoordinatorLeave

public PromoteNewestMemberOnCoordinatorLeave()

Method Details

getNewMembership

public List<Address> getNewMembership(Collection<Address> currentMembers,
 Collection<Address> joiners,
 Collection<Address> leavers,
 Collection<Address> suspects)

Description copied from class: GMS.DefaultMembershipPolicy

Takes the existing membership list and removes suspected and left members, then adds new members to the end of the list

Specified by:

getNewMembership in interface MembershipChangePolicy

Overrides:

getNewMembership in class GMS.DefaultMembershipPolicy

Parameters:

currentMembers - The list of current members. Guaranteed to be non-null (but may be empty)

joiners - The joining members. Guaranteed to be non-null (but may be empty)

leavers - Members that are leaving. Guaranteed to be non-null (but may be empty)

suspects - Members which are suspected. Guaranteed to be non-null (but may be empty)

Returns:

The new membership. Needs to be non-null and cannot contain duplicates