org.jboss.system

Class ServiceMBeanSupport

java.lang.Object

javax.management.NotificationBroadcasterSupport

org.jboss.system.ServiceMBeanSupport

All Implemented Interfaces:

MBeanRegistration, NotificationBroadcaster, NotificationEmitter, Service, ServiceMBean

public class ServiceMBeanSupport
extends NotificationBroadcasterSupport
implements ServiceMBean, MBeanRegistration

An abstract base class JBoss services can subclass to implement a service that conforms to the ServiceMBean interface. Subclasses must override getName() method and should override startService(), and stopService() as approriate.

Author:

Rickard Öberg, Scott.Stark@jboss.org, Andreas Schaefer, Jason Dillon, Eduardo Martins (AS7)

See Also:

ServiceMBean

Field Summary

Fields

Modifier and Type	Field and Description
protected Logger	log
protected MBeanServer	server The MBeanServer which we have been register with.
protected ObjectName	serviceName The object name which we are registered under.

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

Constructor Summary

Constructors

Constructor and Description
ServiceMBeanSupport() Construct a ServiceMBeanSupport.
ServiceMBeanSupport(Class<?> type) Construct a ServiceMBeanSupport.
ServiceMBeanSupport(Logger log) Construct a ServiceMBeanSupport.
ServiceMBeanSupport(String category) Construct a ServiceMBeanSupport.

Method Summary

Modifier and Type	Method and Description
void	create() create the service, do expensive operations etc
protected void	createService() Sub-classes should override this method to provide custum 'create' logic.
void	destroy() destroy the service, tear down
protected void	destroyService() Sub-classes should override this method to provide custum 'destroy' logic.
Logger	getLog()
String	getName() Use the short class name as the default for the service name.
protected long	getNextNotificationSequenceNumber() The getNextNotificationSequenceNumber method returns the next sequence number for use in notifications.
protected ObjectName	getObjectName(MBeanServer server, ObjectName name) Sub-classes should override this method if they only need to set their object name during MBean pre-registration.
MBeanServer	getServer()
ObjectName	getServiceName()
int	getState()
String	getStateString()
protected void	jbossInternalCreate()
protected String	jbossInternalDescription()
protected void	jbossInternalDestroy()
void	jbossInternalLifecycle(String method) Detyped lifecycle invocation
protected void	jbossInternalStart()
protected void	jbossInternalStop()
long	nextNotificationSequenceNumber() The nextNotificationSequenceNumber method returns the next sequence number for use in notifications.
void	postDeregister()
void	postRegister(Boolean registrationDone)
void	preDeregister()
ObjectName	preRegister(MBeanServer server, ObjectName name) Callback method of MBeanRegistration before the MBean is registered at the JMX Agent.
void	start() start the service, create is already called
protected void	startService() Sub-classes should override this method to provide custum 'start' logic.
void	stop() stop the service
protected void	stopService() Sub-classes should override this method to provide custum 'stop' logic.

Methods inherited from class javax.management.NotificationBroadcasterSupport

addNotificationListener, getNotificationInfo, handleNotification, removeNotificationListener, removeNotificationListener, sendNotification

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

log

protected Logger log

server

protected MBeanServer server

The MBeanServer which we have been register with.

serviceName

protected ObjectName serviceName

The object name which we are registered under.

Constructor Detail

ServiceMBeanSupport

public ServiceMBeanSupport()

Construct a ServiceMBeanSupport.

Sets up logging.

ServiceMBeanSupport

public ServiceMBeanSupport(Class<?> type)

Construct a ServiceMBeanSupport.

Sets up logging.

Parameters:

type - The class type to determine category name from.

ServiceMBeanSupport

public ServiceMBeanSupport(String category)

Construct a ServiceMBeanSupport.

Sets up logging.

Parameters:

category - The logger category name.

ServiceMBeanSupport

public ServiceMBeanSupport(Logger log)

Construct a ServiceMBeanSupport.

Parameters:

log - The logger to use.

Method Detail

getName

public String getName()

Use the short class name as the default for the service name.

Specified by:

getName in interface ServiceMBean

Returns:

a description of the mbean

getServiceName

public ObjectName getServiceName()

getServer

public MBeanServer getServer()

getState

public int getState()

Specified by:

getState in interface ServiceMBean

getStateString

public String getStateString()

Specified by:

getStateString in interface ServiceMBean

getLog

public Logger getLog()

create

public void create()
            throws Exception

Description copied from interface: Service

create the service, do expensive operations etc

Specified by:

create in interface Service

Throws:

Exception - for any error

start

public void start()
           throws Exception

Description copied from interface: Service

start the service, create is already called

Specified by:

start in interface Service

Throws:

Exception - for any error

stop

public void stop()

Description copied from interface: Service

stop the service

Specified by:

stop in interface Service

destroy

public void destroy()

Description copied from interface: Service

destroy the service, tear down

Specified by:

destroy in interface Service

jbossInternalDescription

protected String jbossInternalDescription()

jbossInternalLifecycle

public void jbossInternalLifecycle(String method)
                            throws Exception

Description copied from interface: ServiceMBean

Detyped lifecycle invocation

Specified by:

jbossInternalLifecycle in interface ServiceMBean

Throws:

Exception

jbossInternalCreate

protected void jbossInternalCreate()
                            throws Exception

Throws:

Exception

jbossInternalStart

protected void jbossInternalStart()
                           throws Exception

Throws:

Exception

jbossInternalStop

protected void jbossInternalStop()

jbossInternalDestroy

protected void jbossInternalDestroy()

preRegister

public ObjectName preRegister(MBeanServer server,
                              ObjectName name)
                       throws Exception

Callback method of MBeanRegistration before the MBean is registered at the JMX Agent.

Attention: Always call this method when you overwrite it in a subclass because it saves the Object Name of the MBean.

Specified by:

preRegister in interface MBeanRegistration

Parameters:

server - Reference to the JMX Agent this MBean is registered on

name - Name specified by the creator of the MBean. Note that you can overwrite it when the given ObjectName is null otherwise the change is discarded (maybe a bug in JMX-RI).

Returns:

the ObjectName

Throws:

Exception - for any error

postRegister

public void postRegister(Boolean registrationDone)

Specified by:

postRegister in interface MBeanRegistration

preDeregister

public void preDeregister()
                   throws Exception

Specified by:

preDeregister in interface MBeanRegistration

Throws:

Exception

postDeregister

public void postDeregister()

Specified by:

postDeregister in interface MBeanRegistration

getObjectName

protected ObjectName getObjectName(MBeanServer server,
                                   ObjectName name)
                            throws MalformedObjectNameException

Sub-classes should override this method if they only need to set their object name during MBean pre-registration.

Parameters:

server - the mbeanserver

name - the suggested name, maybe null

Returns:

the object name

Throws:

MalformedObjectNameException - for a bad object name

createService

protected void createService()
                      throws Exception

Sub-classes should override this method to provide custum 'create' logic.

This method is empty, and is provided for convenience when concrete service classes do not need to perform anything specific for this state change.

Throws:

Exception - for any error

startService

protected void startService()
                     throws Exception

Sub-classes should override this method to provide custum 'start' logic.

This method is empty, and is provided for convenience when concrete service classes do not need to perform anything specific for this state change.

Throws:

Exception - for any error

stopService

protected void stopService()
                    throws Exception

Sub-classes should override this method to provide custum 'stop' logic.

This method is empty, and is provided for convenience when concrete service classes do not need to perform anything specific for this state change.

Throws:

Exception - for any error

destroyService

protected void destroyService()
                       throws Exception

Sub-classes should override this method to provide custum 'destroy' logic.

This method is empty, and is provided for convenience when concrete service classes do not need to perform anything specific for this state change.

Throws:

Exception - for any error

nextNotificationSequenceNumber

public long nextNotificationSequenceNumber()

The nextNotificationSequenceNumber method returns the next sequence number for use in notifications.

Returns:

a long value

getNextNotificationSequenceNumber

protected long getNextNotificationSequenceNumber()

The getNextNotificationSequenceNumber method returns the next sequence number for use in notifications.

Returns:

a long value