1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
package examples.actors
import scala.actors.{Actor, Exit}
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 {
println("starting actor " + n + " (" + self + ")")
self.trapExit = true
link(a)
loop {
receive {
case ex @ Exit(from, reason) =>
println("Actor " + n + " received " + ex)
exit('finished)
case any => {
println("Actor " + n + " received " + any)
a ! any
}
}
}
}
def top1(): Actor = actor {
println("starting last actor" + " (" + self + ")")
receive {
case Stop =>
println("Last actor now exiting")
exit('abnormal)
case any =>
println("Last actor received " + any)
top1()
}
}
}
|
