第20章：Scalaでアクター！ ref: http://qiita.com/f81@github/items/55b83d7f4104b1a4dfac

ActorSample.scala

import akka.actor.ActorSystem
import akka.actor.Props
import akka.actor.Actor
import akka.routing.RoundRobinRouter

object ActorSample {

def main(args: Array[String]): Unit = {
val system = ActorSystem("helloSystem")
val router = system.actorOf(Props[HelloActor].withRouter(RoundRobinRouter(4)))

router ! "Hello"

system.shutdown
}
}

class HelloActor extends Actor {

def receive = {
case "Hello" => println("Hello World!!")
case _ => println("Bad World!!")
}

}

file0.txt

$ git clone https://github.com/f81/actor_sample.git

file1.txt

actor_sample $ tree
.
├── LICENSE
├── README.md
├── build
├── build.gradle
└── src
├── main
│   ├── resources
│   └── scala
│   └── ActorSample.scala
└── test
├── resources
└── scala

file3.txt

$ cd actor_sample
$ gradle run
:compileJava UP-TO-DATE
:compileScala
:processResources UP-TO-DATE
:classes
:run
Hello World!!

BUILD SUCCESSFUL

Total time: 11.639 secs

file4.scala

router ! "Hello"

file5.scala

val system = ActorSystem("helloSystem")
val router = system.actorOf(Props[HelloActor].withRouter(RoundRobinRouter(4)))