Right out of the gate in my experience with Oracle BPEL, I have to integrate with a non-SOAP HTTP service. Luckily, Lucas Jellema over on the AMIS Technology blog has a very well written article that goes end to end on exactly what you need to do in order to get Oracle and HTTP (REST) Get to play nicely with each other.
I’d also like to add that Oracle themselves include an example as well in the documentation in section “702.Bindings”.
If I was in WebSphere Integration Developer v6.0.2.x, I’d have to write the custom invocation logic myself.
In WebSphere Integration Developer v6.1.x I can use the HTTP Import Binding.