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package examples.actors
import scala.actors.{Actor, Scheduler}
import scala.actors.Actor._
import scala.actors.scheduler.SingleThreadedScheduler
object message {
def main(args: Array[String]) {
val n = try { args(0).toInt }
catch {
case _ =>
println("Usage: examples.actors.message <n>")
Predef.exit
}
val nActors = 500
val finalSum = n * nActors
Scheduler.impl = new SingleThreadedScheduler
def beh(next: Actor, sum: Int) {
react {
case value: Int =>
val j = value + 1; val nsum = sum + j
if (next == null && nsum >= n * j)
println(nsum)
else {
if (next != null) next ! j
if (nsum < n * j) beh(next, nsum)
}
}
}
def actorChain(i: Int, a: Actor): Actor =
if (i > 0) actorChain(i-1, actor(beh(a, 0))) else a
val firstActor = actorChain(nActors, null)
var i = n; while (i > 0) { firstActor ! 0; i -= 1 }
Scheduler.shutdown()
}
}
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