Can i use "sender" in Akka FSM code?

Question

class RulesFSMActor extends Actor with FSM[State, Data]{
  When(Rule1)
  {
    case Event(CASE_MSG1, Data) => 
      if (<someconditon>)
        goto(Rule2)
  }
  When(Rule2)
  {
    case Event(CASE_MSG2, Data) => 
    if (<someconditon>){
      sender ! MessgeBackToCaller"    // Is it allowed to use "sender" ?
      goto(Rule1)
  }
 }
//unhandled ,...etc
}

Assume my initial state is "Rule1" and it keeps toggling between states, If its in "Rule1" , it moves to "Rule2" and vice versa , based on some condition it has to send a message back to Caller(Sender).

Appreciate your help!

score 0 · Answer 1 · answered Sep 09 '14 at 14:38

0

Yes you can. FSMs are normal actors with the receive implemented to handle states.

answered Sep 09 '14 at 14:38

Ravi Kiran

1,139
6
10

score 0 · Answer 2 · answered Sep 09 '14 at 21:46

0

Yes, of course! FSM's are only an extension (a "domain specific language") for defining Actors which have multiple states.

answered Sep 09 '14 at 21:46

Konrad 'ktoso' Malawski

13,102
3
47
52

if the fsm pipes a message to self in is the sender now self? – a11hard Apr 20 '16 at 18:10
yes but you can put the information about `initial` sender in the data and pass it across states – michal777 Feb 05 '19 at 15:35

Can i use "sender" in Akka FSM code?

2 Answers2