Package org.wildfly.clustering.singleton.election

Class SimpleSingletonElectionPolicy

java.lang.Object

org.wildfly.clustering.singleton.election.SimpleSingletonElectionPolicy

All Implemented Interfaces:

SingletonElectionPolicy

@Deprecated(forRemoval=true)
public class SimpleSingletonElectionPolicy
extends Object
implements SingletonElectionPolicy

Deprecated, for removal: This API element is subject to removal in a future version.

Replaced by SingletonElectionPolicy.position(int).

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 Summary

Constructors

Constructor	Description
SimpleSingletonElectionPolicy()	Deprecated, for removal: This API element is subject to removal in a future version.
SimpleSingletonElectionPolicy(int position)	Deprecated, for removal: This API element is subject to removal in a future version.

Method Summary

Modifier and Type	Method	Description
Node	elect(List<Node> candidates)	Deprecated, for removal: This API element is subject to removal in a future version. Elect a single member from the specified list of candidate members.

Methods inherited from class java.lang.Object

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

Constructor Details

SimpleSingletonElectionPolicy

public SimpleSingletonElectionPolicy()

Deprecated, for removal: This API element is subject to removal in a future version.

SimpleSingletonElectionPolicy

public SimpleSingletonElectionPolicy(int position)

Deprecated, for removal: This API element is subject to removal in a future version.

Method Details

elect

public Node elect(List<Node> candidates)

Deprecated, for removal: This API element is subject to removal in a future version.

Description copied from interface: SingletonElectionPolicy

Elect a single member from the specified list of candidate members.

Specified by:

elect in interface SingletonElectionPolicy

Returns:

the elected member