Hi there, Protocol buffers don't really works on "any case class", you have to map values to protoc generated message classes, (middle collumn in the example), whihc are generated from an IDL shows on the left hand side column here: https://developers.google.com/protocol-buffers/
Read up on how protoc works, that should help a bit to grasp how to go about it I think. You could also use a simpler serialization mechanism, like Kryo or even some JSON formats depending on what your use case is. Protocol buffers are really great at long term schema evolution and overall efficiency of serialization, sadly they require some additional work from you as a developer to prepare the messages – a world of tradeoffs we live in :) -- Cheers, Konrad 'ktoso’ Malawski Akka @ Typesafe On 14 February 2016 at 07:28:07, Lap Ming Lee ([email protected]) wrote: I have a service that relies on path dependent types for its protocol such that: class Service[P <: Protocol] extends PersistentActor { type Request = P#Request sealed trait RequestEvent case class RequestAccepted(id: RequestId, request: Request) extends RequestEvent override def receiveCommand: Receive = { case request: Request => persist(RequestAccepted(request.id, request)) {event => ...} } } The request type is a base type such that any implementation simply extends it case class RequestA(id: RequestId, somethingA:Any) extends Request case class RequestB(id: RequestId, somethingB:Any, processId: String) extends Request How would one go persisting path dependent types with Protobuff in this case? Since a) RequestAccepted case class cannot be in an object since Request is not known outside of Service class b) Request is only the base type. How do I ensure it persists the implementation type instead? => I read something about extensions and unions, but doesn't it request the RequestAccepted case class to specify the implement type instead? -- >>>>>>>>>> Read the docs: http://akka.io/docs/ >>>>>>>>>> Check the FAQ: >>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user --- You received this message because you are subscribed to the Google Groups "Akka User List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout. -- >>>>>>>>>> Read the docs: http://akka.io/docs/ >>>>>>>>>> Check the FAQ: >>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user --- You received this message because you are subscribed to the Google Groups "Akka User List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout.
