ABAP Proxy to XI scenario with no Receiver

Hi,

I am working on a scenario where R/3 sends a request to XI through ABAP Proxy and expects response synchronously. I am calling a UDF Java function within a mapping to get response, so there is no receiver, per se.

Can someone guide me how to map this scenario?

REQUEST_DT: Field1, Field2

RESPONSE_DT : Resp_Field1

Grpahical Mapping: Pass Field1, Field2 to a UDF function which populates Resp_Field1. This Resp_Field1 is sent back to R/3 synchronously for the Request.

I hope someone can help me.

Thanks

Venkat Viswanathan