com.lightbend.akka.sbr

Class SplitBrainResolver.KeepOldest

java.lang.Object

com.lightbend.akka.sbr.SplitBrainResolver.Strategy

com.lightbend.akka.sbr.SplitBrainResolver.KeepOldest

All Implemented Interfaces:

akka.actor.NoSerializationVerificationNeeded

Enclosing class:

SplitBrainResolver

public static class SplitBrainResolver.KeepOldest
extends SplitBrainResolver.Strategy

Down the part that does not contain the oldest member (current singleton).

There is one exception to this rule if downIfAlone is defined to true. Then, if the oldest node has partitioned from all other nodes the oldest will down itself and keep all other nodes running. The strategy will not down the single oldest node when it is the only remaining node in the cluster.

Note that if the oldest node crashes the others will remove it from the cluster when downIfAlone is true, otherwise they will down themselves if the oldest node crashes, i.e. shutdown the whole cluster together with the oldest node.

If the role is defined the decision is based only on members with that role, i.e. using the oldest member (singleton) within the nodes with that role.

It is only using members within the own data center, i.e. oldest within the data center.

Constructor Summary

Constructors

Constructor and Description
KeepOldest(java.lang.String selfDc, boolean downIfAlone, scala.Option<java.lang.String> role)

Method Summary

Modifier and Type	Method and Description
SplitBrainResolver.Decision	decide()
boolean	downIfAlone()
scala.math.Ordering<akka.cluster.Member>	ordering()
scala.Option<java.lang.String>	role()

Methods inherited from class com.lightbend.akka.sbr.SplitBrainResolver.Strategy

add, addReachable, addUnreachable, allMembersInDC, hasIndirectlyConnected, indirectlyConnected, isAllUnreachableDownOrExiting, joining, lease, members, members, membersWithRole, membersWithRole, nodesToDown, nodesToDown$default$1, reachability, reachableMembers, reachableMembers, reachableMembersWithRole, reachableMembersWithRole, remove, reverseDecision, seenBy, selfDc, setReachability, setSeenBy, unreachable, unreachable, unreachableButNotIndirectlyConnected, unreachableMembers, unreachableMembers, unreachableMembersWithRole, unreachableMembersWithRole

Methods inherited from class java.lang.Object

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

Constructor Detail

KeepOldest

public KeepOldest(java.lang.String selfDc,
                  boolean downIfAlone,
                  scala.Option<java.lang.String> role)

Method Detail

decide

public SplitBrainResolver.Decision decide()

Specified by:

decide in class SplitBrainResolver.Strategy

downIfAlone

public boolean downIfAlone()

ordering

public scala.math.Ordering<akka.cluster.Member> ordering()

Overrides:

ordering in class SplitBrainResolver.Strategy

role

public scala.Option<java.lang.String> role()

Specified by:

role in class SplitBrainResolver.Strategy