A generic routing service

gistfile1.scala

class RoutingService[REQUEST <: Request, RESPONSE](
     val routes: PartialFunction[Request, Service[REQUEST, RESPONSE]])
  extends Service[REQUEST, RESPONSE] {

  protected[this] val requestToService = routes

  def apply(request: REQUEST): Future[RESPONSE] = {
    val service = requestToService(request)
    service(request)
  }
}

object MyRoutingService {
  def byRequest[REQUEST, RESPONSE](routes: PartialFunction[Request, Service[REQUEST, RESPONSE]]) =
    new RoutingService(
      new PartialFunction[Request, Service[REQUEST, RESPONSE]] {
        def apply(request: Request)       = routes(request)
        def isDefinedAt(request: Request) = routes.isDefinedAt(request)
      }
    )
}