9:27 a.m.
We have just one deployment, the RHQ EAR, which is deployed in "A Mixed
Approach" manner, as described by Brian in this wiki page:
https://community.jboss.org/wiki/ExtendingAS7
I'm not expecting the server to determine a shutdown order, as it has no
way to know which jobs our Quartz scheduler is currently running.
What I'm asking is an advice on how I can make one @Singleton bean
automatically depend on all other beans in the deployment.
So far, the only solution I could imagine was a implementing a
DeploymentUnitProcessor in a AS extension.
For the record, before we moved to AS7, our shutdown code was triggered
by the notification of type STOP_NOTIFICATION_TYPE from the JBoss MBean
server.
On startup:
ObjectName jbossServerName = new ObjectName("jboss.system:type=Server");
MBeanServer jbossServer = MBeanServerLocator.locateJBoss();
jbossServer.addNotificationListener(jbossServerName, new
ShutdownListener(), null, null);
And in the ShutdownListener:
if
(org.jboss.system.server.Server.STOP_NOTIFICATION_TYPE.equals(notification.getType()))
// Do shutdown
}
Le 23/05/2013 15:09, Stuart Douglas a écrit :
What are you actually asking for?
I'm not really sure what your use case is, is there just one deployment?
Can you be very specific as to what EJB's depend on other EJB's and why
they have a dependency?
Reading your email it sounds like you expect us to magically determine a
shutdown order, which does not sound possible based on what you describe.
Stuart
Thomas Segismont wrote:
> Hi,
>
> I recently created this BZ for EAP6.1:
>
> Bug 958217 - Unable to call Stateless bean methods from Singleton
> PreDestroy callback
> https://bugzilla.redhat.com/show_bug.cgi?id=958217
>
> I though I could call any EJB bean from a @Singleton @PreDestroy method
> but, as Jaikiran pointed out, the @DependsOn annotation is needed to
> prevent dependencies from being shutdown before this last call.
>
> While it is doable to manually list a few dependencies, it is obviously
> not an option if your shutdown code virtually needs any of your EJB
> beans to be available: in RHQ, we want to be able to shutdown a Quartz
> scheduler gracefully, and the jobs running at shutdown might depend on
> any EJB bean.
>
> I though of adding a DeploymentUnitProcessor which would automatically
> make a "special" @Singleton bean (marked with an annotation) depend on
> all over beans in the RHQ deployment.
>
> What do you think?
>
> Thanks and regards,
> Thomas
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