Sharing objects among session beans

owulff Dec 7, 2002 7:47 AM

I use the ServletContext to share objects among servlets. This objects are singletons or object references to corba services.

What possibilities do I have in EJB to share objects among session beans?

I use a servlet which stores some objects in the ServletContext during startup of the engine. How can I do this with EJB?

Thanks for your help!

Oliver

1. Re: Sharing objects among session beans

owulff Dec 8, 2002 8:56 AM (in response to owulff)

I want to precise my problem. During startup, I initialize my Corba Orb and store it in the servlet context. I've still no idea how I can solve this in EJB.

Should I write just a singleton object which returns the Orb? How can I initialize the Orb during startup of JBoss?

Oliver
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2. Re: Sharing objects among session beans

mjremijan Dec 8, 2002 12:46 PM (in response to owulff)

As far as I can tell this cannot be done. Session beans are a service and only become available once a service start. There is no "starting point" like an init() method, at least as far as I can tell. However, you can approximate the behavior with a static property/method call of a shared library. If you put a library in /lib/ext, then the first time a session bean make a call, it will be initialized. Other session beans will be able to grab the same reference.
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3. Re: Sharing objects among session beans

owulff Dec 9, 2002 2:28 AM (in response to owulff)

What about writing an MBean which does some core initialization and stores common objects in JNDI?
Where can I find information about writing my own mbeans which fit in the jBoss architecture?
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