Sending messages to actors and collecting responses

In this recipe, you will learn how a parent sends messages to its child, and collects responses from them.

To step through this recipe, we need to import the Hello-Akka project in the IDE.

How to do it...

1. Create a file, SendMesagesToChilds.scala, in package com.packt.chapter2.
2. Add the following imports to the top of the file:

        import akka.actor.{ Props, ActorSystem, Actor, ActorRef } 

3. Create messages to be sent to the actors as follows:

        case class DoubleValue(x: Int) 
        case object CreateChild 
        case object Send 
        case class Response(x: Int) 

4. Define a child actor. It doubles the value sent to it.

        class DoubleActor extends Actor { 
          def receive = { 
        ...