A dispatching system that uses a common interface to interface with all sub-applications, regardless of their logic models. The common interface provides a service method or routine that the dispatching system invokes to effect processing by the sub-application. Each sub-application implements the common interface and shares a common context with the other sub-applications. In one embodiment, the dispatching system receives requests (e.g., HTTP requests), identifies the sub-applications that should process the received requests, and invokes the service routines of the identified sub-applications to process the received requests. Each sub-application may have an associated match criteria that indicates when the sub-application should process the requests.