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package examples.actors
import scala.actors.Actor
import scala.actors.Actor._
object links extends Application {
case object Stop
actor {
val start = link(p(2))
start ! Stop
}
def p(n: int): Actor =
if (n == 0) top1()
else top(p(n-1), n)
def top(a: Actor, n: int): Actor = actor {
Console.println("starting actor " + n + " (" + Thread.currentThread() + ")")
self.trapExit = true
link(a)
loop {
receive {
case ex @ ('EXIT, from, reason) =>
Console.println("Actor " + n + " received " + ex)
exit('finished)
case any => {
Console.println("Actor " + n + " received " + any)
a ! any
}
}
}
}
def top1(): Actor = actor {
Console.println("starting last actor" + " (" + Thread.currentThread() + ")")
receive {
case Stop =>
Console.println("Last actor now exiting")
exit('abnormal)
case any =>
Console.println("Last actor received " + any)
top1()
}
}
}
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