是否可以在不使用事件的情况下设置计时器 - 在 Akka 演员内部？ （打字阿卡）

Question

The documentation is not too clear on setting up a timer inside an actor. This is the closest information on this I could find: Scheduling messages to self . However it's not clear from there if we can create an internal timer inside the actor that would just trigger some actor's method every 5 seconds for example (eg checking actor's state and reacting on its change), without receiving and sending events.

If such timer is possible to set up, how reliable would it be? (eg if it can fail while the actor would continue functioning otherwise)

Also if such timer is possible to set up, there supposed to be a possibility of stopping and (re-) starting the timer by the triggered method or another actor's method?

Answer 1

If by

trigger some actor's method every 5 seconds for example (eg checking actor's state and reacting on its change), without receiving and sending events

you mean "schedule a method within the actor to be called without sending a message to the actor", then the answer is no.

Methods in an actor should only ever be executed in direct response to a message sent to the actor (or during the spawning of an actor, but that's arguably effectively a message). To do otherwise is to throw out (at least) nearly every guarantee the actor model can make.