org.jboss.ha.singleton
Interface HASingletonMBean

All Superinterfaces:

HAServiceMBean (src) , NotificationBroadcaster (src) , Service (src) , ServiceMBean (src)

All Known Subinterfaces:

HASingletonControllerMBean (src)

All Known Implementing Classes:

HASingletonController (src) , HASingletonSupport (src)

public interface HASingletonMBean

extends HAServiceMBean (src)

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.

isMasterNode

public boolean isMasterNode()

Returns:

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