In OSI model, SOAP protocol is not on the same layer as IP/TCP. IP/TCP is a transform layer, serving the SOAP protocal. In another word, your SOAP may be based on the IP/TCP transform layer, just like HTTP is based on IP/TCP or other protocols on the transport layer.

Session.clear

If you run your program locally as a server, you need to install. I think what you should be careful about is the connecting string of your database file.