This blog gives you a short demo of how to invoke Rules Web Service from WebDynpro Application.
For this purpose, I have created a silent demonstration available at - http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/a0ace84f-40f0-2b10-09b9-e31e90cb920b
In this demo, I performed the following set of steps –
1. Created the WebService for the ruleset by making use of the WSGenerator Tool(available at - )
2. Created Adaptive Web Service model by using the wsdl generated from the previous step.
3. Created the Component and applied the service controller template to it.
4. Created the required forms and tables in the view and included lines of code to call the execute invoke rule method created at the service controller level.
A step by step explanation of this is available in the presentation available here - http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/e04e00db-3df0-2b10-9b92-ff8f00bc2df2