Duncan Example

gistfile1.txt

import scala.actor._
import scala.actor.Actor._

sealed trait DoSomething
case class SaySomething(text: String) extends DoSomething
case class YellSomething(text: String) extends DoSomething

object DuncanExample {
  def main(args: Array[String]) {
    val nActors = 5
    Scheduler.impl = new SingleThreadedScheduler

    val mySupervisor = new MySupervisor
    mySupervisor start
}

class MySupervisor extends Actor {
	val myChildren = List(new MyChild, new MyChild, new MyChild)
	myChildren.map(child => {
			this link child
			child start
		})
	
	def act(): Unit = {
		trapExit = true // if you don't trap, this gets killed along with the one that died
		def run(head: Actor): Nothing = react {
			case Exit(deadActor, reason) => // do something, maybe create/start new instance, or just report it
			case x => {
				myChildren.map(child => child ! x)
				run(head)
			}
		}
	}
}

class MyChild extends Actor {
	override def act : Unit = {
		this.react {
			case SaySomething(_) => println(_)
			case YellSomething(_) => println(_.capitalize)
			case _ => throw new Exception("nuts")
		}
	}
}