SampleActor34.scala

import akka.actor.{Actor, Props}
import play.libs.Akka

object Sample {

  case class MsgNotify()
  case class MsgFindOrder(orderId: String)
  case class MsgOrderFound(order: {def accountId: String})
  case class MsgFindAccount(accountId: String)
  case class MsgAccountFound(account: {def email:String})
  case class MsgSend(email: String, message: String)

  class SomeDbActor extends Actor {
    def receive = { case _ => {} }
  }
  class SomeEmailActor extends Actor {
    def receive = { case _ => {} }
  }

  class MyActor(orderId:String, notification:String) extends Actor {
    val db    = Akka.system.actorOf(Props(new SomeDbActor()))
    val email = Akka.system.actorOf(Props(new SomeEmailActor()))

    def receive = {
      case MsgNotify => db ! MsgFindOrder(orderId)
      case MsgOrderFound(order) => db ! MsgFindAccount(order.accountId)
      case MsgAccountFound(account) => email ! MsgSend(account.email, notification)
    }
  }

  def notify(orderId: String, notification: String) = {
    val a = Akka.system.actorOf(Props(new MyActor(orderId, notification)))
    a ! new MsgNotify
  }

}