[JBoss 5.1 GA & EJB 3.0] disable persistence for an EJB Time

[longbeach]

Hi,
As stated here : http://www.jboss.org/file-access/default/members/jbossas/freezone/docs/Server_Configuration_Guide/4/html/EJBs_on_JBoss-EJB_Timer_Configuration.html

Timer events are intended to be persistent and should be executed even in the event of a server failure.

How do you disable persistence of EJB Timers in JBoss 5.1 GA, so that EJB timers do not automatically restart when the server restarts ?

Thanks.

[longbeach]

Well, after some investigation on the jmx console, it seems that one way to do it is to invoke the deleteTimer operation in the EJBTimerService service.

Restart the server and the timer is gone.

I am not sure this is the correct way to do it though.
Can anyone confirm or infirm this ?

Thanks

[longbeach]

Correction :
I meant to invoke the operation clearTimers and not deleteTimer

Thanks.
Celinio Fernandes

[dimitris]

There is a NoopPersistencePolicy you can use in ejb3-timer-service.xml

[longbeach]

There is a NoopPersistencePolicy you can use in ejb3-timer-service.xml

Thanks.

Did you mean jboss-5.1.0.GA.jdk6\server\default\deploy\ejb2-timer-service.xml ?

Because i do not see any ejb3-timer-service.xml file in this version of JBoss.

Celinio Fernandes

[longbeach]

There is also another file called ejb3-timerservice-jboss-beans.xml, which is almost empty.

Not too sure which one to use and tweak.

What do you think ?

Thanks
Celinio Fernandes

[wolfc]

Dimitris meant ejb2-timer-service.xml, see also how it was done in AS 4 http://www.jboss.org/file-access/default/members/jbossas/freezone/docs/Server_Configuration_Guide/4/html/EJBs_on_JBoss-EJB_Timer_Configuration.html.

ejb3-timerservice-jboss-beans.xml only defines a bean that delegates to the old EJB 2 Timer Service. So ejb2-timer-service.xml is authoritative.

[longbeach]

Thanks wolfc.
So if i want to disable persistence of every timer, all i need to do is remove the comments around the EJBTimerService MBean, in ejb2-timer-service.xml :

<mbean code="org.jboss.ejb.txtimer.NoopPersistencePolicy" name="jboss.ejb:service=EJBTimerService,persistencePolicy=noop"/>

Am i correct ?

Thanks.
Celinio Fernandes

[jaikiran]

"longbeach" wrote:
all i need to do is remove the comments around the EJBTimerService MBean, in ejb2-timer-service.xml
...
Am i correct ?

And also let the EJBTimerServiceImpl, in that file, know that it has to use this persistence policy. So change the PersistencePolicy attribute in that file to

<attribute name="PersistencePolicy">jboss.ejb:service=EJBTimerService,persistencePolicy=noop</attribute>

[longbeach]

Thanks.

So that means to change that code :

 <!-- An EJB Timer Service that is Tx aware -->
 <mbean code="org.jboss.ejb.txtimer.EJBTimerServiceImpl"
 name="jboss.ejb:service=EJBTimerService">
 <attribute name="TimerIdGeneratorClassName">org.jboss.ejb.txtimer.BigIntegerTimerIdGenerator</attribute>
 <attribute name="TimedObjectInvokerClassName">org.jboss.ejb.txtimer.TimedObjectInvokerImpl</attribute>
 <depends optional-attribute-name="RetryPolicy">jboss.ejb:service=EJBTimerService,retryPolicy=fixedDelay</depends>
 <depends optional-attribute-name="PersistencePolicy">jboss.ejb:service=EJBTimerService,persistencePolicy=database</depends>
 <depends optional-attribute-name="TransactionManagerFactory" proxy-type="org.jboss.tm.TransactionManagerFactory">
 jboss:service=TransactionManager
 </depends>
 </mbean>

to that :

 <mbean code="org.jboss.ejb.txtimer.EJBTimerServiceImpl"
 name="jboss.ejb:service=EJBTimerService">
 <attribute name="TimerIdGeneratorClassName">org.jboss.ejb.txtimer.BigIntegerTimerIdGenerator</attribute>
 <attribute name="TimedObjectInvokerClassName">org.jboss.ejb.txtimer.TimedObjectInvokerImpl</attribute>
 <attribute name="PersistencePolicy">jboss.ejb:service=EJBTimerService,persistencePolicy=noop</attribute>
 <depends optional-attribute-name="RetryPolicy">jboss.ejb:service=EJBTimerService,retryPolicy=fixedDelay</depends>
 <!-- <depends optional-attribute-name="PersistencePolicy">jboss.ejb:service=EJBTimerService,persistencePolicy=database</depends> -->
 <depends optional-attribute-name="TransactionManagerFactory" proxy-type="org.jboss.tm.TransactionManagerFactory">
 jboss:service=TransactionManager
 </depends>
 </mbean>

I added that line and comment out the dependance on optional-attribute-name.

Is that right ? I am not too familiar with MBeans.

Thanks again.
Celinio Fernandes

[jaikiran]

"longbeach" wrote:

and comment out the dependance on optional-attribute-name.

Instead of commenting out that dependency, change it to depend on the new MBean:

<depends optional-attribute-name="PersistencePolicy">jboss.ejb:service=EJBTimerService,persistencePolicy=noop</depends>