Lori,
What we're talking about is having a (remote) client where the stub classes
do not exist until runtime. I tried to do that at one point with WebLogic
as well. Very cool that you got it to work. Did you classload the stub
classes from WebLogic over HTTP via the classpath servlet?
David
Lori Sutton <[EMAIL PROTECTED]> on 10/07/99 01:30:03 PM
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Subject Corba-based vs rmi-based App Servers
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I'm struggling with using a Corba-based vs an rmi-based EJB
application server. I don't know if my problem is unique or not.
I want to be able to write clients that dynamically and remotely
look into the app server, find out the EJBs that are deployed in
the JNDI directory, and dynamically get a reference to those beans
that were dynamically discovered. And I want to do this w/o the
client having any prior knowledge of the bean classes. I should
be able to use introspection/reflection to find out which methods
I can call on these beans and call them.
I've been able to do this with an rmi-based application server(Weblogic).
But, I'm trying a corba-based application server that doesn't allow me to
do this (Gemstone/J). In order for the Gemstone/J client to work,
there must a jar file on the client containing the bean classes.
This was not required with the rmi-based server.
Is this a fluke with these 2 app servers? Or is this pretty common with
corba-based vs rmi-based servers? I'm not a corba or rmi
expert, so I don't know. I know that the Gemstone orb doesn't support
DII. Is this the problem? Even if the Gemstone orb did support DII,
wouldn't there be a lot of work that the client would have to do to
be able to dynamically get a reference to one of these beans? And
it would be some pretty ugly CORBA code in the client? And it wouldn't
work if we wanted to re-deploy these beans in, say, Weblogic?
What is the basic issue? Does the issue lie with CORBA vs RMI, or is it
an issue between these 2 specific application servers? Is this why all
the hype for a pure java application server? Any help or comments would
be greatly appreciated.
Thank you,
Lori Sutton
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