com.gigaspaces.cluster.activeelection

Class PriorityElectionFilter

java.lang.Object

com.gigaspaces.cluster.activeelection.PriorityElectionFilter

All Implemented Interfaces:

IActiveElectionDecisionFilter

public class PriorityElectionFilter
extends Object
implements IActiveElectionDecisionFilter

This election decision filter provides the condition to aquire desired space state on NamingService. The state will be acquired only if isAcceptable(ActiveElectionState.State, List) returns true.

The final Primary space status will be acquired only if ActiveElectionState.State.ACTIVE will be accepted.

NOTE: The member with ISpaceState.STARTED of State or with lower order memberID in fail-over group is acceptable to advance to aquireState.

Since:

6.0

Version:

1.0

Author:

Igor Goldenberg

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	PriorityElectionFilter.CandidateEntry Comparable class to sort candidate members according the State and order ID in the cluster.

Constructor Summary

Constructors

Constructor and Description
PriorityElectionFilter(String memberName, FailOverPolicy failOverPolicy) Constructor.

Method Summary

Modifier and Type	Method and Description
int	compareTo(ServiceItem service1, ServiceItem service2)
ICandidateEntry	getCandidateEntry(ServiceItem service)
boolean	isAcceptable(ActiveElectionState.State aquireState, List<ServiceItem> candidateSrv) This method provides the condition to advance the manage member to aquireState state.

Methods inherited from class java.lang.Object

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

Constructor Detail

PriorityElectionFilter

public PriorityElectionFilter(String memberName,
                              FailOverPolicy failOverPolicy)

Constructor.

Parameters:

memberName - the cluster member name.

failOverPolicy - the fail over policy.

Method Detail

isAcceptable

public boolean isAcceptable(ActiveElectionState.State aquireState,
                            List<ServiceItem> candidateSrv)

This method provides the condition to advance the manage member to aquireState state.

Specified by:

isAcceptable in interface IActiveElectionDecisionFilter

Parameters:

candidateSrv - the candidates to aquire desired state.

aquireState - the state to aquire.

Returns:

true if the manage member is acceptable to aquire desired aquireState state.

compareTo

public int compareTo(ServiceItem service1,
                     ServiceItem service2)

Specified by:

compareTo in interface IActiveElectionDecisionFilter

getCandidateEntry

public ICandidateEntry getCandidateEntry(ServiceItem service)

Specified by:

getCandidateEntry in interface IActiveElectionDecisionFilter