Hi,
I'm re-posting this from scala-user.
I have a problem with FSM Actors in Akka. Say I have a bunch of states and
the transitions look something like this:
Waiting -> Active -> Expired
You can't get from Waiting to Expired directly. But when in "Waiting" I
still need to be able to send an "Expire" message to the actor, at which
point I need the actor to execute the transition changes for both (Waiting
-> Active) and for (Active -> Expired).
So I basically want something like this (making stuff up):
when(Waiting) {
case Event(Expire, _) =>
goto(Active).andThen(Expired)
}
onTransition {
case Waiting -> Active => /* activate */
case Active -> Expired => /* expiry */
}
This is basically a non-deterministic finite automaton.
Looking at the documentation and in the source-code, I don't believe this
is possible. It would have been great though, because the goto() on the
Expire event would make it perfectly clear that the actor first goes into
Active before being Expired. So what choices do I have?
Thanks,
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