have moved to the lightbend forum. On Wednesday, 4 April 2018 12:39:22 UTC+1, daz...@gmail.com wrote: > > Hi, > > I am playing around with supervision in Java Akka 2.5.8 / 2.12. > > I would like to have the ability to decorate any old actor's behaviour > with retry logic. > > I have the following: > https://pastebin.com/3qV8kDfz > > A number of questions: > > 1) The exception thrown by the SupervisedActor is logged as an error: > > 11:43:00.542 [TestActorSystem-akka.actor.default-dispatcher-3] ERROR > OneForOneStrategy - > nullcom.tesco.payments.async.TestSupervisionDocs$RestartMe: null > at > com.tesco.payments.async.TestSupervisionDocs$PrinterActor.lambda$createReceive$0(TestSupervisionDocs.java:66) > > It's not clear to me that I've done things correctly - what's the 'null' > for? > > Also, is there a way to not have this logged as an error? > > 2) I had to use Backoff.onStop(...) rather than what seemed more intuitive > Backoff.onFailure(...). Are there any issues I should be aware off with > this? > > 3) In the SupervisedActor, I have overridden preRestart, which after a > restart, sends the parent (supervisor) the failed message again, with the > original sender. > > sending to self rather than supervisor didn't work, don't understand why? > > In any case is there a way to have the supervisor send the message again? > Then the supervised actor would not need to be aware of its supervision nor > know its parent is something special, nor contain part of the retry logic. > > One way I can think off is to have the thrown exception contain the > message, supervised actor and original sender, and then have supervisor > send it to itself: > > DeciderBuilder > .match(RestartMe.class, e -> { > System.out.println("RETRY caught------------------"); > e.self.tell(e.msg, e.sender); > return restart(); > }) > > > However this still requires the SupervisedActor having some involvement in > the process (throwing an exception with information specific to retry), and > seems a bit ugly. > > Help / thoughts much appreciated! > daz >
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