com.sun.sgs.impl.service.nodemap.policy
Class LocalNodePolicy

java.lang.Object
  com.sun.sgs.impl.service.nodemap.policy.AbstractNodePolicy
      com.sun.sgs.impl.service.nodemap.policy.RoundRobinPolicy
          com.sun.sgs.impl.service.nodemap.policy.LocalNodePolicy

All Implemented Interfaces:

NodeAssignPolicy

public class LocalNodePolicy
extends RoundRobinPolicy

The simpliest node policy possible: always assign to the local requesting node. Round robin assignment is used when the server is making the request due to node failure.

Field Summary

Fields inherited from class com.sun.sgs.impl.service.nodemap.policy.AbstractNodePolicy

availableNodes

Fields inherited from interface com.sun.sgs.impl.service.nodemap.NodeAssignPolicy

SERVER_NODE

Constructor Summary

LocalNodePolicy(Properties props)
Creates a new instance of the LocalNodePolicy, which always assigns an identity to the node which requested an assignment be made.

Method Summary

long	chooseNode(long requestingNode) Choose a node to assign an identity, or set of identities to.

Methods inherited from class com.sun.sgs.impl.service.nodemap.policy.AbstractNodePolicy

chooseNode, nodeAvailable, nodeUnavailable, reset

Methods inherited from class java.lang.Object

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

Constructor Detail

LocalNodePolicy

public LocalNodePolicy(Properties props)

Creates a new instance of the LocalNodePolicy, which always assigns an identity to the node which requested an assignment be made.

Parameters:

props - service properties

Method Detail

chooseNode

public long chooseNode(long requestingNode)
                throws NoNodesAvailableException

Choose a node to assign an identity, or set of identities to.

This implementation simply assigns to the node making the request. Round robin assignment is used if the server is making the request (due to reassigning identities from a failed node).

Specified by:

chooseNode in interface NodeAssignPolicy

Overrides:

chooseNode in class RoundRobinPolicy

Parameters:

requestingNode - the id of the node making the request, or SERVER_NODE if the system is making the request

Returns:

the chosen node's id

Throws:

NoNodesAvailableException - if there are no live nodes to assign to