I've created the actor below and when I attempt to run my app, I get the
error "could not find implicit value for parameter um:
akka.http.unmarshalling.FromRequestUnmarshaller" for the Person class
despite the fact that I have defined an implicit formatter for it.

When I had this same route and server binding defined outside of an actor
(in the main app), I didn't have this problem. Any thoughts? Thanks in
advance. I was following this post as a guide, BTW:
http://blog.michaelhamrah.com/2015/01/adding-http-server-side-events-to-akka-streams/

class HttpService
  extends Actor
  with Directives
  with ImplicitFlowMaterializer
  with CoreActors
  with DefaultJsonProtocol
  with ActorLogging{

  implicit val system = context.system //used by CoreActors trait
  implicit val executionContext = context.system.dispatcher
  implicit val personFormat = jsonFormat1(Person)
  implicit val timeout = new Timeout(1 second)
  implicit val materializer = FlowMaterializer()

  override def receive: Receive = Actor.emptyBehavior

  Http()(context.system)
    .bind("localhost", 8081)
    .startHandlingWith(route)

  private def route: Route =
    path("person" ) {
      post {
        handleWith { person:Person =>
          (personServiceActor ? person).mapTo[String]
        }
      }
    }
}

object HttpService {
  def props = Props(new HttpService)
}

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