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 in time, cluster-wide.

The service provides a simple way for a concrete mbean 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: 1.2.8.2 $

Author:

Ivelin Ivanov, Dimitris Andreadis

Field Summary

static String	HASINGLETON_STARTED_NOTIFICATION
static String	HASINGLETON_STARTING_NOTIFICATION Notifications emitted locally by an HASingleton to indicate state transitions
static String	HASINGLETON_STOPPED_NOTIFICATION
static String	HASINGLETON_STOPPING_NOTIFICATION

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() True if this cluster node has the active mbean singleton, false otherwise

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

callMethodOnPartition, getClusterPartition, getDistributedState, getPartitionName, sendNotification, setClusterPartition, 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

Field Detail

HASINGLETON_STARTING_NOTIFICATION

static final String HASINGLETON_STARTING_NOTIFICATION

Notifications emitted locally by an HASingleton to indicate state transitions

See Also:

Constant Field Values

HASINGLETON_STARTED_NOTIFICATION

static final String HASINGLETON_STARTED_NOTIFICATION

See Also:

Constant Field Values

HASINGLETON_STOPPING_NOTIFICATION

static final String HASINGLETON_STOPPING_NOTIFICATION

See Also:

Constant Field Values

HASINGLETON_STOPPED_NOTIFICATION

static final String HASINGLETON_STOPPED_NOTIFICATION

See Also:

Constant Field Values

Method Detail

isMasterNode

boolean isMasterNode()

True if this cluster node has the active mbean singleton, false otherwise