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// Modified by Philipp Haller to use Scala's event-based actors.
package examples.actors
import scala.actors._
import scala.actors.Actor._
object Message {
def main(args: Array[String]) = {
val n = try {
Integer.parseInt(args(0))
}
catch {
case _ =>
scala.Console.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): unit =
react {
case value: int =>
val j = value + 1; val nsum = sum + j
if (next == null && nsum >= finalSum) {
Console.println(nsum)
System.exit(0)
}
else {
if (next != null) next ! 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 = i-1 }
}
}
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