org.jboss.ha.singleton
Class HASingletonSupport
java.lang.Object
org.jboss.mx.util.JBossNotificationBroadcasterSupport (src)
org.jboss.system.ServiceMBeanSupport (src)
org.jboss.ha.jmx.HAServiceMBeanSupport (src)
org.jboss.ha.singleton.HASingletonSupport
- All Implemented Interfaces:
- HAServiceMBean (src) , HASingleton (src) , HASingletonMBean (src) , MBeanRegistration (src) , NotificationBroadcaster (src) , NotificationEmitter (src) , Service (src) , ServiceMBean (src)
- Direct Known Subclasses:
- AbstractScheduleProvider (src) , HASingletonController (src) , HASingletonSupportTester (src)
- public class HASingletonSupport
- extends HAServiceMBeanSupport (src)
- implements HASingletonMBean (src) , HASingleton (src)
Management Bean for an HA-Singleton service.
| Fields inherited from interface org.jboss.system.ServiceMBean (src) |
CREATE_EVENT, CREATED, DESTROY_EVENT, DESTROYED, FAILED, REGISTERED, START_EVENT, STARTED, STARTING, states, STOP_EVENT, STOPPED, STOPPING, UNREGISTERED |
|
Method Summary |
void |
_stopOldMaster()
This method will be invoked twice by the local node
when it stops as well as by the remote |
boolean |
isMasterNode()
|
protected void |
makeThisNodeMaster()
|
void |
partitionTopologyChanged(java.util.List newReplicants,
int newViewID)
When topology changes, a new master is elected based on the result
of the isDRMMasterReplica() call. |
void |
startSingleton()
Extending classes should override this method and implement the custom
singleton logic. |
void |
stopSingleton()
Extending classes should override this method and implement the custom
singleton logic. |
| Methods inherited from class org.jboss.ha.jmx.HAServiceMBeanSupport (src) |
_receiveRemoteNotification, callAsyncMethodOnPartition, callMethodOnPartition, callMethodOnPartition, findHAPartitionWithName, getDistributedState, getPartition, getPartitionName, getServiceHAName, isDRMMasterReplica, registerDRMListener, registerRPCHandler, sendNotification, sendNotificationRemote, sendNotificationToLocalListeners, setDistributedState, setPartitionName, setupPartition, startService, stopService, unregisterDRMListener, unregisterRPCHandler |
| Methods inherited from class org.jboss.system.ServiceMBeanSupport (src) |
create, createService, destroy, destroyService, getLog, getName, getNextNotificationSequenceNumber, getObjectName, getServer, getServiceName, getState, getStateString, jbossInternalCreate, jbossInternalDescription, jbossInternalDestroy, jbossInternalLifecycle, jbossInternalStart, jbossInternalStop, postDeregister, postRegister, preDeregister, preRegister, start, stop |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
HASingletonSupport
public HASingletonSupport()
isMasterNode
public boolean isMasterNode()
- Specified by:
isMasterNode in interface HASingletonMBean (src)
- Returns:
- true if this cluster node has the active mbean singleton.
false otherwise
startSingleton
public void startSingleton()
Extending classes should override this method and implement the custom
singleton logic. Only one node in the cluster is the active master.
If the current node is elected for master, this method is invoked.
When another node is elected for master for some reason, the
stopSingleton() method is invokded.
When the extending class is a stateful singleton, it will
usually use putDistributedState() and getDistributedState() to save in
the cluster environment information that will be needed by the next node
elected for master should the current master node
fail.
- Specified by:
startSingleton in interface HASingleton (src)
- See Also:
HASingleton (src)
stopSingleton
public void stopSingleton()
- Extending classes should override this method and implement the custom
singleton logic. Only one node in the cluster is the active master.
If the current node is master and another node is elected for master, this
method is invoked.
- Specified by:
stopSingleton in interface HASingleton (src)
- See Also:
HASingleton (src)
partitionTopologyChanged
public void partitionTopologyChanged(java.util.List newReplicants,
int newViewID)
- When topology changes, a new master is elected based on the result
of the isDRMMasterReplica() call.
- Overrides:
partitionTopologyChanged in class HAServiceMBeanSupport (src)
- See Also:
HAServiceMBeanSupport.partitionTopologyChanged(List, int),
DistributedReplicantManager#isMasterReplica(String);
makeThisNodeMaster
protected void makeThisNodeMaster()
_stopOldMaster
public void _stopOldMaster()
- This method will be invoked twice by the local node
when it stops as well as by the remote