Akka/Scala example source code file (Faq.scala)

This example Akka source code file (Faq.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Akka and Scala source code examples by using tags.

All credit for the original source code belongs to akka.io; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Akka tags/keywords

actor, akka, barmessage, bazmessage, foomessage, got, int, message, myactor, reply, string

The Faq.scala Akka example source code

package docs.faq

import akka.actor.Actor

//#exhaustiveness-check
object MyActor {
  // these are the messages we accept
  sealed abstract trait Message
  final case class FooMessage(foo: String) extends Message
  final case class BarMessage(bar: Int) extends Message

  // these are the replies we send
  sealed abstract trait Reply
  final case class BazMessage(baz: String) extends Reply
}

class MyActor extends Actor {
  import MyActor._
  def receive = {
    case message: Message => message match {
      case BarMessage(bar) => sender() ! BazMessage("Got " + bar)
      // warning here: 
      // "match may not be exhaustive. It would fail on the following input: FooMessage(_)"
    }
  }
}
//#exhaustiveness-check