Calling Adapter Service from Portlet

Hi Guys, Is it possible to call an adapter service in IS from a portlet or does it need to be wrapped with a flow service? Specifically I want to call a service(adaptor or flow) to fill a dropdown box. Thanks

It is always recommended to wrap any adapter services as flow services in IS before consume them from CAF application


Cool thanks for the info so now I will ask more, are there any best practices/patterns for this technique?