impl goat actor

build.sbt

@@ -3,3 +3,9 @@ name := "akka-goat-mail"
 version := "1.0"
 
 scalaVersion := "2.11.7"
+
+lazy val akkaVersion = "2.4.1"
+
+libraryDependencies ++= Seq(
+  "com.typesafe.akka" %% "akka-actor" % akkaVersion
+)

src/main/scala/GoatMail.scala

@@ -0,0 +1,29 @@
+import akka.actor.{ActorRef, Props, ActorSystem, Actor}
+
+case class Mail(message: String)
+
+case class Start(target: ActorRef)
+
+case class Goat(name: String) extends Actor {
+
+  def say(msg: String) = println(name + ": " + msg)
+
+  def eat(): Unit = this.say("om nom nom nom...")
+
+  def receive = {
+    case Start(ar) =>
+      ar ! Mail("Hello!")
+    case Mail(s) =>
+      this.eat()
+      sender() ! Mail("What did you write about?")
+  }
+
+}
+
+object GoatMail extends App {
+  val goatPool = ActorSystem("goat-pool")
+  val whiteGoat = goatPool.actorOf(Props(classOf[Goat], "white-goat"))
+  val blackGoat = goatPool.actorOf(Props(classOf[Goat], "black-goat"))
+
+  whiteGoat ! Start(blackGoat)
+}