[jboss-user] [EJB] - EJB Remote Invocation Problem

catmarch2004 do-not-reply at jboss.com
Tue Nov 10 03:32:54 EST 2009




I have some issues with EJB remote procedure returning. The target application server is a JBoss App Server. In-explicably, the remote call is unable to locate the class being returned and subsequently throws a ClassNotFoundException. After tracing, it seems that the JBoss remoting mechanism is unable to locate the classes despite the dependencies between each plug-in.


Attempts to resolve this using Buddy Policy (either registered or global) did not work. 


In my Eclipse RCP application, I currently have 4 plug-ins

n       plug-in A (where the EJB interfaces are stored)

n       plug-in B (where the classes being returned by interfaces in A are stored)

n       plug-in C (my RCP main app is stored)

n       plug-in D (the plugin containing the code that will call the interfaces in A.)


I have set up the plug-in dependencies so that it works this way:

n       plug-in A depends on plug-in B

n       plug-in B has no dependency

n       plug-in C depends on plug-in D

n       plug-in D depends on A


So the dependency chart looks something like C ¨¤ D ¨¤ A ¨¤ B. I have also added to the MANIFEST.MF the packages needed to be exported as well. 


I am baffled to why the recommended solutions (dependencies and Buddy-Policy) did not work. I am able to get it to work by changing the ContextClassLoader, but frankly, using that will involve a lot of boiler plate code that makes my eyes bleed. I am posting my problem here to see if I can get this resolved without resorting to the ContextClassLoader hack. 


Any advice or solutions will be most appreciated.

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