You could probably use reflection to choose the SomeHandlersXYZ
at runtime, but if you don't want to resort to reflection then I don't think that there is a way of achieving what you want without at least duplicating the subactor instantiation code (see this answer of mine for an explanation). You could do it the following way (sketched), where you basically pass in a factory function:
class ActorSupervisor(prop: Prop, getSubActor: Actor => SubActorClass) extends Actor {
val dbSuper = context.actorOf(prop)
val subActor = context.actorOf(Props(getSubActor(dbSuper)))
def receive = {
case msg =>
subActor forward msg
}
}
val asOne = new ActorSupervisor(..., a => new SubActorClass(a) with SomeHandlersOne)
val asTwo = new ActorSupervisor(..., a => new SubActorClass(a) with SomeHandlersTwo)