Creating a ScatterGatherFirstCompletedPool of actors

In this recipe, we will learn about the ScatterGatherFirstCompletedPool of actors. Eponymously it sends the same message to all the actors, waits for the actor who first completes the work, and sends a response to it. It then discards replied from the other actors.

Getting ready

1. Create a Scala file, ScatterGatherFirstCompletedpool.scala, in the package com.packt.chapter3.
2. Add the following imports at the top of the file:

        import akka.actor.{Actor, ActorSystem, Props} 
        import akka.pattern.ask 
        import akka.routing.ScatterGatherFirstCompletedPool 
        import akka.util.Timeout 
        import scala.concurrent.Await 
        import scala.concurrent.duration 

3. Create an example actor as follows:

        class ScatterGatherFirstCompletedPoolActor extends Actor {  
          override def receive = {  
            case msg: String => sender ! "I say hello back to you"  
            case _ => println(s" I don't understand...