使用Context.actorOf时如何将回调函数传递给akka actor构造函数？

我想将回调传递给其构造函数中的akka​​ actor：

object FSMActorWithCallback {
  type Tracer = (Int, NodeState, NodeData, ActorRef, Any) => Unit
}

class FSMActorWithCallback(tracerCallback: FSMActorWithCallback.Tracer) extends FSMAwesomeActor
  // method is called each FSM Event so we can record current state and next message 
  override def trace(state: NodeState, data: NodeData, sender: ActorRef, msg: Any) : Unit = {
    // different tracing callback for different test rigs such as unit tests or integration tests
    tracerCallback(nodeUniqueId, state, data, sender, msg)
  }
}

这将允许我使用定义原始actor，new但我需要使用actorOffactory方法来使actor正确挂接到系统中：

class Supervisor extends Actor {

  def outputStateTrace(state: NodeState, data: NodeData, sender: ActorRef, msg: Any): Unit = { 
    /*actually make a binary log for analysis of complex failures*/
  }

  // COMPILE ERROR "follow this method with _ if you wan to treat it as a partially applied function" 
  var child = contact.actorOf(Props(classOf[FSMActorWithCallback], outputStateTracer) 

  // seems to work fine but not what i need
  val childRaw = new FSMActorWithCallback(tracer) 

}

actor的实际构造需要通过所示的factory方法进行，但我无法弄清楚如何通过factory方法传递回调。