Interface that parameterizes the MultiActionController class
using the Strategy GoF Design pattern, allowing
the mapping from incoming request to handler method name
to be varied without affecting other application code.
Return a method name that can handle this request. Such
mappings are typically, but not necessarily, based on URL.
Parameters: request - current HTTP request a method name that can handle this request.Never returns null; throws exception if not resolvable. throws: NoSuchRequestHandlingMethodException - if no handler methodcan be found for the given request