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Java Source Code / Java Documentation » EJB Server JBoss 4.2.1 » cluster » org.jboss.ha.jmx

Source Cross Reference Class Diagram Java Document (Java Doc)

org.jboss.ha.jmx .HAServiceMBeanSupport

All known Subclasses:   org.jboss.ha.jmx.examples .HANotificationBroadcasterExample,  org.jboss.ha.singleton .HASingletonSupport,
HAServiceMBeanSupport
public class HAServiceMBeanSupport extends ServiceMBeanSupport implements HAServiceMBean(Code)
Management Bean for an HA-Service. Provides a convenient common base for cluster symmetric MBeans. This class is also a user transparent extension of the standard NotificationBroadcasterSupport to a clustered environment. Listeners register with their local broadcaster. Invoking sendNotification() on any broadcaster, will notify all listeners in the same cluster partition. TODO: The performance can be further optimized by avoiding broadcast messages when remote listener nodes are not interested (e.g. have no local subscribers) or by iterating locally over filters or remote listeners.
author:
   Ivelin Ivanov *
version:
   $Revision: 57188 $

Constructor Summary
public HAServiceMBeanSupport()


Method Summary
public void _receiveRemoteNotification(Notification notification)
     Invoked by remote broadcasters.
protected void callAsyncMethodOnPartition(String methodName, Object[] args, Class[] types)

public void callMethodOnPartition(String methodName, Object[] args)

public void callMethodOnPartition(String methodName, Object[] args, Class[] types)

protected HAPartition findHAPartitionWithName(String name)

public ClusterPartitionMBean getClusterPartition()

public Serializable getDistributedState(String key)
     Convenience method for sharing state across a cluster partition.
public HAPartition getPartition()

public String getPartitionName()

public boolean getSendLocalLifecycleNotifications()
     Gets whether JMX Notifications should be sent to local (same JVM) listeners if the notification is for an attribute change to attribute "State".
public boolean getSendRemoteLifecycleNotifications()
     Gets whether JMX Notifications should be sent to remote listeners if the notification is for an attribute change to attribute "State".
public String getServiceHAName()
     Override this method only if you need to provide a custom partition wide unique service name.
protected boolean isDRMMasterReplica()

public void partitionTopologyChanged(List newReplicants, int newReplicantsViewId)

protected void registerDRMListener()

protected void registerRPCHandler()

public void sendNotification(Notification notification)
     Broadcast the notification to the remote listener nodes (if any) and then invoke super.sendNotification() to notify local listeners.
Parameters:
  notification - sent out to local listeners and other nodes.
protected void sendNotificationRemote(Notification notification)

protected void sendNotificationToLocalListeners(Notification notification)

public void setClusterPartition(ClusterPartitionMBean clusterPartition)

public void setDistributedState(String key, Serializable value)
     Convenience method for sharing state across a cluster partition.
public void setPartitionName(String newPartitionName)

public void setSendLocalLifecycleNotifications(boolean sendLocalLifecycleNotifications)
     Sets whether JMX Notifications should be sent to local (same JVM) listeners if the notification is for an attribute change to attribute "State".
public void setSendRemoteLifecycleNotifications(boolean sendRemoteLifecycleNotifications)
     Sets whether JMX Notifications should be sent to remote listeners if the notification is for an attribute change to attribute "State".
protected void setupPartition()

protected void startService()

Implementors of this method should not code the singleton logic here.
protected void stopService()

protected void unregisterDRMListener()

protected void unregisterRPCHandler()


Constructor Detail
HAServiceMBeanSupport
public HAServiceMBeanSupport()(Code)

Method Detail
_receiveRemoteNotification
public void _receiveRemoteNotification(Notification notification)(Code)
Invoked by remote broadcasters. Delegates to the super class

callAsyncMethodOnPartition
protected void callAsyncMethodOnPartition(String methodName, Object[] args, Class[] types) throws Exception(Code)

callMethodOnPartition
public void callMethodOnPartition(String methodName, Object[] args) throws Exception(Code)

Parameters:
  methodName -
Parameters:
  args -
throws:
  Exception - HAServiceMBeanSupport.callMethodOnPartition(String,Object[],Class[])

callMethodOnPartition
public void callMethodOnPartition(String methodName, Object[] args, Class[] types) throws Exception(Code)

findHAPartitionWithName
protected HAPartition findHAPartitionWithName(String name) throws Exception(Code)

getClusterPartition
public ClusterPartitionMBean getClusterPartition()(Code)

getDistributedState
public Serializable getDistributedState(String key)(Code)
Convenience method for sharing state across a cluster partition. Delegates to the DistributedStateService
Parameters:
  key - key for the distributed object Serializable the distributed object

getPartition
public HAPartition getPartition()(Code)

getPartitionName
public String getPartitionName()(Code)

getSendLocalLifecycleNotifications
public boolean getSendLocalLifecycleNotifications()(Code)
Gets whether JMX Notifications should be sent to local (same JVM) listeners if the notification is for an attribute change to attribute "State".
Default is true.

See Also:   HAServiceMBeanSupport.sendNotification(Notification)

getSendRemoteLifecycleNotifications
public boolean getSendRemoteLifecycleNotifications()(Code)
Gets whether JMX Notifications should be sent to remote listeners if the notification is for an attribute change to attribute "State".
Default is true.

See http://jira.jboss.com/jira/browse/JBAS-3194 for an example of a use case where this property should be set to false.

See Also:   HAServiceMBeanSupport.sendNotification(Notification)

getServiceHAName
public String getServiceHAName()(Code)
Override this method only if you need to provide a custom partition wide unique service name. The default implementation will usually work, provided that the getServiceName() method returns a unique canonical MBean name. partition wide unique service name

isDRMMasterReplica
protected boolean isDRMMasterReplica()(Code)

partitionTopologyChanged
public void partitionTopologyChanged(List newReplicants, int newReplicantsViewId)(Code)

registerDRMListener
protected void registerDRMListener() throws Exception(Code)

registerRPCHandler
protected void registerRPCHandler()(Code)

sendNotification
public void sendNotification(Notification notification)(Code)
Broadcast the notification to the remote listener nodes (if any) and then invoke super.sendNotification() to notify local listeners.
Parameters:
  notification - sent out to local listeners and other nodes. It should be serializable.It is recommended that the source of the notification is an ObjectName of an MBean that is is available on all nodes where the broadcaster MBean is registered.
See Also:   HAServiceMBeanSupport.getSendLocalLifecycleNotifications()
See Also:   HAServiceMBeanSupport.getSendRemoteLifecycleNotifications()
See Also:   javax.management.NotificationBroadcasterSupport.sendNotification(Notification)

sendNotificationRemote
protected void sendNotificationRemote(Notification notification) throws Exception(Code)
Broadcast a notifcation remotely to the partition participants
Parameters:
  notification -

sendNotificationToLocalListeners
protected void sendNotificationToLocalListeners(Notification notification)(Code)

setClusterPartition
public void setClusterPartition(ClusterPartitionMBean clusterPartition)(Code)

setDistributedState
public void setDistributedState(String key, Serializable value) throws Exception(Code)
Convenience method for sharing state across a cluster partition. Delegates to the DistributedStateService
Parameters:
  key - key for the distributed object
Parameters:
  value - the distributed object

setPartitionName
public void setPartitionName(String newPartitionName)(Code)

setSendLocalLifecycleNotifications
public void setSendLocalLifecycleNotifications(boolean sendLocalLifecycleNotifications)(Code)
Sets whether JMX Notifications should be sent to local (same JVM) listeners if the notification is for an attribute change to attribute "State".
Default is true.

See Also:   HAServiceMBeanSupport.sendNotification(Notification)

setSendRemoteLifecycleNotifications
public void setSendRemoteLifecycleNotifications(boolean sendRemoteLifecycleNotifications)(Code)
Sets whether JMX Notifications should be sent to remote listeners if the notification is for an attribute change to attribute "State".
Default is true.

See http://jira.jboss.com/jira/browse/JBAS-3194 for an example of a use case where this property should be set to false.

See Also:   HAServiceMBeanSupport.sendNotification(Notification)

setupPartition
protected void setupPartition() throws Exception(Code)

startService
protected void startService() throws Exception(Code)

Implementors of this method should not code the singleton logic here. The MBean lifecycle create/start/stop are separate from the singleton logic. Singleton logic should originate in becomeMaster().

Attention: Always call this method when you overwrite it in a subclass because it elects the master singleton node.

stopService
protected void stopService() throws Exception(Code)

Attention: Always call this method when you overwrite it in a subclass

unregisterDRMListener
protected void unregisterDRMListener() throws Exception(Code)

unregisterRPCHandler
protected void unregisterRPCHandler()(Code)

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