On 2001.08.03 02:14:09 -0400 Andreas Schaefer wrote:
> Hi David
>
> Based on the Marc's presentation about the future of JBoss I see that you
> basically JBoss loads and instantiate the
> ServiceControl/ConfigurationService
> and then "deploys" the MBeans at runtime where there is not difference if
> at the startup or in any other part of the life of the application
> server.
>
> There are some points I want to bring in here:
>
> - when you talking about the classes in the classpath you are talking
> about
> how the classes gets looked up and loaded which is different from the
> instantiation of the objects (which is like the deployment of the EJBs
> and
> creations of the EJBs through create() or the finder methods).
> - we could use application specific classloaders which would allow to
> undeploy
> the class the MBeans are based on (or to load the new classes in the
> new
> classloader).
> - The service.xml (or service deployement descriptor) declares what
> instances
> of MBeans are created (name, constructor arguments and attributes). We
> should maybe also add (what someone else brought up earlier) an
> operation
> tag allowing the deployement descriptor what operations to call (right
> know
> we assume that this would be init() and start()) but this wouldn't be
> true
> for
> applications specific MBeans).
I'm not sure about the tags- right now you can define a ServiceFactory
class with the mbean that will accept the lifecycle calls (init, start,
stop, destroy) and do with them what it wishes: the original intent was to
block calls, but you could map them to something else just as well. I
don't see why we'd want more than these 4 service lifecycle events, so I
don't see much use in more tags.
>
> Mad Andy
>
>
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