General question: Connect to EJB

Hi,
At the moment I am working on the architectural design of a new application written by J2EE technology.
To study the subject I read many books and tried a large number of HelloWorld applications with EJB.
As I understand it, the EJB works like this:
Client ==> [RMI] ==> EJB ==> [JCA] ==> Node X
or
Client ==> [RMI] ==> EJB ==> [JDBC] ==> RDBMS
My picture from EJB down to JCA or JDBC is quite clear although the construction of a JCA was quite troublesome. My picture from the Client to the EJB is not so clear.
Until now I succeeded to connect to a EJB by using JMS, RMI and Webservice (SOAP).
Web Services is great since my application must support this so it looks a good idea to connect this with a stateless session bean.......
However I also need to support some kind of simplified LDAP and perhaps another legacy protocol. So I think I actually need to add a listening socket to the EJB. Of course this cannot be done by default, since a EJB is not allowed to act as server. But how can we achieve this anyway and work "by the book"? I would like to use stateless session beans to use the Application Servers infrastructure like robust thread handling, clustering and hot deployment possibilities.
Downstream we use JCA/JDBC but how to we listen to upstream commands? Is there only SOAP, RMI and JMS? Should I develop another JCA and connect this to a EJB in some way?
Sorry for all my questions, but in all Hello Pet Store World examples I have seen so far a web tier exists. All operations are initiated by the web browser. In my case there is not such a thing like a web browser or web tier.
Thanks for your support, it would be great if I just knew where to continue reading!
Joop

Hi Dmitry, I too had a few problems with the Sun App server. I was trying to call add a message to a JMS Message queue (of a Message-Driven bean) from a standalone Java application running on a second node. After researching the problem for some time, we still have not found a solution for this bug. We are getting a GIOP Magic error.
You should not have problems deploying an EAR. This is working. You might need to investigate these problems, i.e. deployment process, configuration, etc.
How should I make lookups if I deploy "Enterprise Applications" with EJB inside it. Your lookups should use the InitialContext and the JNDI tree of the application server. Again, you need to make sure that your deployment is correctly building the JNDI tree.
How are you deploying the application modules?
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HunterBD wrote:
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Excellent!
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