Exemple #1
0
// Act, returns a value of true to signal that it is
// done and should not be scheduled again.
func (a *actor) Act(g grid.Grid, exit <-chan bool) bool {
	tx, err := grid.NewSender(g.Nats(), 100)
	if err != nil {
		log.Printf("%v: error: %v", a.ID(), err)
	}
	defer tx.Close()

	rx, err := grid.NewReceiver(g.Nats(), a.ID(), 1, 0)
	if err != nil {
		log.Printf("%v: error: %v", a.ID(), err)
	}
	defer rx.Close()

	ticker := time.NewTicker(2 * time.Second)
	defer ticker.Stop()
	for {
		select {
		case <-exit:
			return true
		case now := <-ticker.C:
			if a.ID() == Leader {
				tx.Send(Follower, &Msg{Time: now, From: a.ID()})
			}
		case m := <-rx.Msgs():
			log.Printf("%v: received: %v", a.ID(), m)
		}
	}
}
Exemple #2
0
func (a *ConsumerActor) Act(g grid.Grid, exit <-chan bool) bool {
	tx, err := grid.NewSender(g.Nats(), 100)
	if err != nil {
		log.Fatalf("%v: error: %v", a.ID(), err)
	}
	defer tx.Close()

	rx, err := grid.NewReceiver(g.Nats(), a.ID(), 4, 0)
	if err != nil {
		log.Fatalf("%v: error: %v", a.ID(), err)
	}
	defer rx.Close()

	a.tx = tx
	a.rx = rx
	a.grid = g
	a.exit = exit
	a.chaos = NewChaos(a.ID())
	defer a.chaos.Stop()

	d := dfa.New()
	d.SetStartState(Starting)
	d.SetTerminalStates(Exiting, Terminating)
	d.SetTransitionLogger(func(state dfa.State) {
		log.Printf("%v: switched to state: %v", a, state)
	})

	d.SetTransition(Starting, EverybodyStarted, Running, a.Running)
	d.SetTransition(Starting, EverybodyFinished, Terminating, a.Terminating)
	d.SetTransition(Starting, Failure, Exiting, a.Exiting)
	d.SetTransition(Starting, Exit, Exiting, a.Exiting)

	d.SetTransition(Running, SendFailure, Resending, a.Resending)
	d.SetTransition(Running, EverybodyFinished, Finishing, a.Finishing)
	d.SetTransition(Running, Failure, Exiting, a.Exiting)
	d.SetTransition(Running, Exit, Exiting, a.Exiting)

	d.SetTransition(Resending, SendSuccess, Running, a.Running)
	d.SetTransition(Resending, SendFailure, Resending, a.Resending)
	d.SetTransition(Resending, Failure, Exiting, a.Exiting)
	d.SetTransition(Resending, Exit, Exiting, a.Exiting)

	d.SetTransition(Finishing, EverybodyFinished, Terminating, a.Terminating)
	d.SetTransition(Finishing, Failure, Exiting, a.Exiting)
	d.SetTransition(Finishing, Exit, Exiting, a.Exiting)

	final, _ := d.Run(a.Starting)
	if final == Terminating {
		return true
	}
	return false
}