Indira, Nehru, and the Roadside Romeo

gistfile1.scala

import actors.Actor

case class Letter(sender: Actor, contents: String)

object Indira extends Actor {
  private var n = 0

  def act: Unit = loopWhile(n < 10) {
    n += 1
    react {
      case Letter(Nehru, contents) => {
        println("Indira received: " + contents)
        Nehru ! Letter(this, "Hello dad!")
      }

      case Letter(from, _) => {
        println("Indira received a letter from an unknown sender. Indira freaked out.")
        from ! Letter(this, "Who are you???")
      }
    }
  }
}

object Nehru extends Actor {
  private var n = 0

  def act: Unit = {
    Indira ! Letter(this, "Hi daughter!")
    loopWhile(n < 10) {
      n += 1
      react {
        case Letter(Indira, contents) => {
          println("Nehru received: " + contents)
          Indira ! Letter(this, "Hi daughter!")
        }
      }
    }
  }
}

case object RoadSideRomeo extends Actor {
  def act: Unit = {
    Indira ! Letter(this, "Hi sweetie")
  }
}

object Main {
  def main(args: Array[String]): Unit = {
    Indira.start
    Nehru.start
    RoadSideRomeo.start
  }
}