Hi all,
I'm not a very experienced J2EE developer.
Recently, I'm trying to write an application which is divided into 3 tiers:

* business logic level (running on a J2EE server) consists of EJB
components.
* orchestration level (running on a J2EE server) which will accept
requests from client applications (not web browsers) and talk to
business logic level components to achieve certain tasks
* client level will run heavy client applications which will talk to
orchestration level across internet connections.

My question is: what communication method/protocol will be suitable for
the communications between these 3 tiers. The options are:
* RMI-IIOP
* XML-RPC
* SOAP
* Other :)

P.S. Transfer of binary data is also required

Could some one please give me some advices of which communication
methods shall I use? Performance is the priority consideration. Please
help. Thanks!!

Joe