sstone

case class AddRequest(x:Int, y:Int)
case class AddResponse(sum:Int)

class Calculator extends Actor {
 protected def receive = {
   case AddRequest(a, b) => sender ! AddResponse(a + b)
 }
}

sstone

package com.aphelia

import akka.actor.{Actor, ActorRef}
import akka.pattern.ask
import akka.serialization.Serializer
import amqp.Amqp.{Publish, Delivery}
import amqp.{RpcClient, RpcServer}
import amqp.RpcServer.ProcessResult
import com.rabbitmq.client.AMQP.BasicProperties
import akka.dispatch.{Future, Await}