Coffeeshop with Scala

CoffeshopExample.scala

import akka.actor.{ActorSystem, Props, Actor, Inbox, ActorRef}
import scala.concurrent.duration._

case class NoSoupForYou
case class OpenShop
case class CloseShop
case class CappucinoRequest
case class TeaRequest
case class Check(amount: Int)

class CoffeeShop(barista: ActorRef) extends Actor{
 var isOpen=true
 def receive = {
   case OpenShop => 
      isOpen = true
     	println("The coffehouse is open")
   case CloseShop => 
    	isOpen = false
    	println("Coffeeshop closing")
   case TeaRequest => 
    	if (isOpen) {
    		println("Sending tea request to the kitchen")
    		barista ! TeaRequest
    		sender ! Check(5)
	      }
      	else {
      		println("No tea for you")
      		sender ! NoSoupForYou
      	}
  case CappucinoRequest =>
    	if (isOpen) {
    		println("Sending cappucino request to the kitchen")
    		barista ! CappucinoRequest 
    		sender ! Check(5)
	    }
    	else{
    		println("No capuccino for you")
    		sender ! NoSoupForYou
    	}
 }

}


class Barista extends Actor{
 
 def receive = {

   case CappucinoRequest => println("Making a Cappucino for the customer")
   case TeaRequest => println("Making Tea for the customer")
 }

}

case class OrderTea
case class OrderCoffee
class Customer(house: ActorRef) extends Actor{
 def receive = {
    case Check(amount) => println(s"Gotta pay my $amount dollar bill")
    case OrderTea => 
		println("I want tea, and I want it now!!")
		house ! TeaRequest
    case OrderCoffee => 
        println("I want coffee, and I want it now!!")
        house ! CappucinoRequest
    case NoSoupForYou => println("Nooooooooo!!!!!!!")
 }

}

object HelloAkkaScala extends App {
  val system = ActorSystem("coffee")
  val barista = system.actorOf(Props[Barista], "Barista")

  val house = system.actorOf(Props(new CoffeeShop(barista)), "house")
  val customer = system.actorOf(Props(new Customer(house)), "customer")
  
  house ! OpenShop
  customer ! OrderCoffee 
  customer ! OrderTea 
  customer ! OrderCoffee 
  customer ! OrderTea 
  house ! CloseShop 
  
  system.shutdown()
}