HASingletonMBean (JBoss Cluster API) - JBoss 4.0.1 sp1 cluster API Documentation 英文版文档

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org.jboss.ha.singleton
Interface HASingletonMBean

All Superinterfaces:: HAServiceMBean, javax.management.NotificationBroadcaster, org.jboss.system.Service, org.jboss.system.ServiceMBean

All Known Subinterfaces:: HASingletonControllerMBean

All Known Implementing Classes:: HASingletonController, HASingletonSupport

public interface HASingletonMBean
extends HAServiceMBean

HA-Singleton interface. Only one mbean is active at any point of time cluster-wide.

The abstract service provides a simple way for a concrete mbeans to detect whether or not it is the active one in the cluster.

Concrete mbeans would usually do activities like regular clean up of database tables or saving statistics about cluster usage.

Version:: $Revision: 1.2 $
Revisions:
Author:: Ivelin Ivanov

Field Summary

Fields inherited from interface org.jboss.system.ServiceMBean

CREATE_EVENT, CREATED, DESTROY_EVENT, DESTROYED, FAILED, REGISTERED, START_EVENT, STARTED, STARTING, states, STOP_EVENT, STOPPED, STOPPING, UNREGISTERED

Method Summary

boolean isMasterNode()

Methods inherited from interface org.jboss.ha.jmx.HAServiceMBean

callMethodOnPartition, getDistributedState, getPartitionName, sendNotification, setDistributedState, setPartitionName

Methods inherited from interface org.jboss.system.ServiceMBean

getName, getState, getStateString, jbossInternalLifecycle

Methods inherited from interface org.jboss.system.Service

create, destroy, start, stop

Methods inherited from interface javax.management.NotificationBroadcaster

addNotificationListener, getNotificationInfo, removeNotificationListener

Method Detail

isMasterNode

public boolean isMasterNode()

Returns:: true if this cluster node has the active mbean singleton. false otherwise