Play Framework: Chain ActionsBuilder and ActionRefiner
问题 I am desperate. I tried to do ActionComposition like in the very last paragraph of the official docs: https://playframework.com/documentation/2.3.x/ScalaActionsComposition My code: object ActionBuilder1 extends ActionRefiner[Request, Request] { override protected def refine[A](request: Request[A]): Future[Either[Result, Request[A]]] = Future {Right(request)} } object ActionBuilder2 extends ActionBuilder[Request] { def invokeBlock[A](request: Request[A], block: (Request[A]) => Future[Result])