I can't get a child actor to receive messages - scala

Question

I'm new to akka and I'm wondering how to get a child actor to receive messages.
I have one parent actor which prints out that it received a message and then sends a message to its child which then prints out that it received a message.
When I run the program, only the parent actor prints its message. Is there
something I'm missing?
The parent actor
class TestDirector(name: String) extends Actor {
import TestDirector._
implicit val timeout = Timeout(5.seconds)
private var child: ActorRef = _
override def preStart(): Unit = {
println(name + " pre-start")
child = context.actorOf(props("test-file"), name = "child-actor")
}
override def receive: Receive = {
case TestDirectory(dir) =>
println("Test Director")
child ! TestWorker.TestFile
}
}
object TestDirector {
case class TestDirectory(dirName: String)
case class TestResponse(message: String)
def props(dirName: String) = Props(classOf[TestDirector], dirName)
}
The child actor
class TestWorker(fileName: String) extends Actor {
import TestWorker._
override def receive: Receive = {
case TestFile => println("Hello world")
}
}
object TestWorker {
case object TestFile
def props(fileName: String) = Props(classOf[TestWorker], fileName)
}

Answer 1

In TestDirector.preStart, you say
child = context.actorOf(props("test-file"), name = "child-actor")
Those "props" are TestDirector.props, which you imported a few lines above, so you're endlessly creating new TestDirectors. I think what you want instead is TestWorker.props:
child = context.actorOf(TestWorker.props("test-file"), name = "child-actor")