Package org.wildfly.clustering.singleton.election

Class SimpleSingletonElectionPolicy

java.lang.Object
org.wildfly.clustering.singleton.election.SimpleSingletonElectionPolicy
All Implemented Interfaces:
SingletonElectionPolicy
public class SimpleSingletonElectionPolicy extends Object implements SingletonElectionPolicy
A simple concrete policy service that decides which node in the cluster should be the primary node to run certain HASingleton service based on attribute "Position". The value will be divided by partition size and only remainder will be used. Let's say partition size is n: 0 means the first oldest node. 1 means the 2nd oldest node. ... n-1 means the nth oldest node. -1 means the youngest node. -2 means the 2nd youngest node. ... -n means the nth youngest node. E.g. the following attribute says the singleton will be running on the 3rd oldest node of the current partition: 2 If no election policy is defined, the oldest node in the cluster runs the singleton. This behavior can be achieved with this policy when "position" is set to 0.
Author:
Alex Fu, Galder Zamarreno, Paul Ferraro

  • Constructor Details

    • SimpleSingletonElectionPolicy

      public SimpleSingletonElectionPolicy()

    • SimpleSingletonElectionPolicy

      public SimpleSingletonElectionPolicy(int position)

  • Method Details