SimpleSingletonElectionPolicy (WildFly: Singleton API 27.0.1.Final API)

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 Summary
  
  Constructors
  Constructor Description
  
  SimpleSingletonElectionPolicy()
  
  SimpleSingletonElectionPolicy(int position)
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  Node elect(List<Node> candidates)
  Elect a single node from the specified list of candidate nodes.
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SimpleSingletonElectionPolicy
```
public SimpleSingletonElectionPolicy()
```
  - SimpleSingletonElectionPolicy
```
public SimpleSingletonElectionPolicy(int position)
```
- Method Detail
  - elect
```
public Node elect(List<Node> candidates)
```
    Description copied from interface: SingletonElectionPolicy
    
    Elect a single node from the specified list of candidate nodes.
    
    Specified by:
    
    elect in interface SingletonElectionPolicy
    
    Parameters:
    
    candidates - a list of candidate nodes.
    
    Returns:
    
    the elected node