Restrictive connection to SAP system from J2EE

Hi,
I am using NW04s SP15. I have a webservice defined in stateless session bean. In my web service I am connecting to SAP system and doing some processing. If there are too many invocations of this webservice all DIA workprocesses of backend system gets used up and CPU runs into 100%. Is there a way I can restrict the number of connections to backend specifically for my application? This has to be configurable at customer end. It should be such that if configured number of DIA workprocesses is exceeded then application should wait and connect again. It should not throw any exception.
I do not want something generic for the J2EE engine, but something specific for my application which is deployed on the server.
Any hints/suggestions would be highly appreciated.
Best Regards,
Suparna

Kumar, in addition to the technical connectivity that Sushma is talking about, if you have security considerations SAP GUI supports SNC, which needs to be configured at both the GUI and server to connect securely. I believe this only secures GUI communication, so if you have other connections between the systems you'll need to have additional security.
There are many hardware routers available, at all cost levels, that will allow you to establish a dedicated VPN (virtual private network) and encrypt all communication. On the extremely low-cost end you can also set up SSL port forwarding for all SAP services (ports 32XX, 80XX, etc), but SSL services have to be enabled on both the front-end and back-end servers.
If you're using web services or other HTTP services, SAP supports the use of HTTPS. Those services need to be set up in ICM control (tcode SICF or SMICM, I can't remember off the top of my head).

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Restrictive connection to SAP system from J2EE

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