Code files for my blog post at http://johnmurray.io

akka-output

Starting Akka...
Running Akka 2.2.0
Deploying file:/Users/jmurray/IdeaProjects/HelloAkka/akka/deploy/hello-akka_2.10-0.0.1.jar
Starting up HelloWorldKernel
Successfully started Akka
Hello, World
Hello, World
Hello, World
Hello, World
...

build.sbt

name := "Hello Akka"
 
version := "0.0.1"
 
scalaVersion := "2.10.2"

resolvers += "Typesafe Repository" at "http://repo.typesafe.com/typesafe/releases/"

libraryDependencies += "com.typesafe.akka" %% "akka-actor" % "2.2.0"

libraryDependencies += "com.typesafe.akka" %% "akka-kernel" % "2.2.0"

Greeter.scala

import akka.actor.Actor

object Greeter {
  case object Greet
}
class Greeter extends Actor {
  def receive = {
    case Greeter.Greet => {
      println("Hello, World")
    }
  }
}

HelloWorldActor.scala

mport akka.actor.{Actor, Props}

object HelloWorldActor {
  case object Tick
}

class HelloWorldActor extends Actor {
  val greeter = context.actorOf(Props[Greeter], "greeter")

  def receive: Actor.Receive = {
    case HelloWorldActor.Tick => greeter ! Greeter.Greet
  }
}

HelloWorldKernel.scala

import akka.actor.{ActorSystem, Props}
import akka.kernel.Bootable
import scala.concurrent.duration._

class HelloWorldKernel extends Bootable {
  val system = ActorSystem("helloworldkernel")
  import system.dispatcher

  def startup() {
    val helloWorldActor = system.actorOf(Props[HelloWorldActor])
    system.scheduler.schedule(0 milliseconds,
      500 milliseconds,
      helloWorldActor,
      HelloWorldActor.Tick)
  }

  def shutdown() {
    system.shutdown()
  }
}

Makefile

all: build deploy
run: build deploy start

build:
  sbt package:clean
  sbt package

start:
  ./akka/bin/akka HelloWorldKernel

deploy:
  mv target/scala-2.10/hello-akka_2.10-0.0.1.jar akka/deploy/

run.sh

wget http://downloads.typesafe.com/akka/akka-2.2.1.tgz
tar xzf akka-2.2.1.tgz
mv akka-2.2.1 akka
rm akka-2.2.1.tgz
dos2unix akka/bin/akka