"The only thing worse than not saying anything, is telling a lie."
(i.e. I don't think that's a solution) On Mon, Mar 21, 2016 at 7:22 PM, Endre Varga <endre.va...@lightbend.com> wrote: > The issue is that there might be 3rd party RS stages, or stages from a > different materializer, so even such future will not guarantee termination > of a graph. But maybe it is still enough. > > On Mon, Mar 21, 2016 at 5:56 PM, Patrik Nordwall < > patrik.nordw...@gmail.com> wrote: > >> Could we have a termination Future, similar to the ActorSystem? >> >> mån 21 mars 2016 kl. 16:59 skrev Endre Varga <endre.va...@lightbend.com>: >> >>> Ah, OK that will work. The only issue is that shutdown() is asynchronous >>> so you cannot be fully sure when it has stopped everything. >>> >>> -Endre >>> >>> On Mon, Mar 21, 2016 at 4:58 PM, <john.vie...@gmail.com> wrote: >>> >>>> Hi Endre, >>>> forgive my wording. I meant calling shutdown() on the materializer of >>>> the current exception-throwing stream and then start this stream >>>> with a new materializer >>>> >>>> Am Montag, 21. März 2016 16:51:01 UTC+1 schrieb Akka Team: >>>> >>>>> >>>>> >>>>> On Mon, Mar 21, 2016 at 4:45 PM, <john....@gmail.com> wrote: >>>>> >>>>>> Hi Endre, >>>>>> I think I do have a valid use case. I have a stream which >>>>>> occasionally fails seriously (maybe 2 times a year) . >>>>>> Since it has a zip stage I have the option to either handle the >>>>>> Exception and keep the Zip stage balanced or >>>>>> just let the exception propagate to the default decider and just >>>>>> restart the stream. >>>>>> >>>>> >>>>> But there is no such thing as "restart the stream". The current >>>>> built-in "supervision" only restarts a single stream processing stage but >>>>> not the whole graph. There is currently no way to restart a whole graph >>>>> and >>>>> it is not a trivial problem to tackle in general. >>>>> >>>>> -Endre >>>>> >>>>> >>>>>> The work of the stream is "transactional" so I have no problems with >>>>>> the current broken state caused by the exception. >>>>>> >>>>>> For me restart simplifies my code so I think It is ok?! >>>>>> >>>>>> Am Montag, 21. März 2016 10:35:58 UTC+1 schrieb Akka Team: >>>>>>> >>>>>>> Hi John, >>>>>>> >>>>>>> I am not sure what you hope to achieve there and if that even >>>>>>> possible. Restarting a graph is more similar to restarting a group of >>>>>>> actors not to a single actor and it is not that easy to do given the >>>>>>> backpressure state between the restarted stages must be preserved. Also, >>>>>>> while one stage fails, other parts of the graph might not and still run >>>>>>> concurrently, etc. >>>>>>> >>>>>>> -Endre >>>>>>> >>>>>>> On Fri, Mar 18, 2016 at 1:34 PM, <john....@gmail.com> wrote: >>>>>>> >>>>>>>> This would be the solution I would use: >>>>>>>> >>>>>>>> http://pastebin.com/pJVnHqcH >>>>>>>> >>>>>>>> I am a little unsure about mat.stop() and the Supervision.stop(). >>>>>>>> >>>>>>>> Should the code work? I want to restart on every Exception thrown >>>>>>>> from any Flow,Source,Sink of the Runnable graph >>>>>>>> >>>>>>>> Am Freitag, 18. März 2016 11:28:23 UTC+1 schrieb drewhk: >>>>>>>>> >>>>>>>>> Hi, >>>>>>>>> >>>>>>>>> There is no such thing at the moment. >>>>>>>>> >>>>>>>>> The onComplete on the sink does not guarantee that the whole >>>>>>>>> stream has actually stopped, it only guarantees that the Sink itself >>>>>>>>> was >>>>>>>>> stopped (which may or may not imply completion of the whole stream; >>>>>>>>> think >>>>>>>>> of graphs). >>>>>>>>> >>>>>>>>> -Endre >>>>>>>>> >>>>>>>>> On Fri, Mar 18, 2016 at 11:25 AM, <john....@gmail.com> wrote: >>>>>>>>> >>>>>>>>>> Hi, >>>>>>>>>> If a graph throws an Exception in any flow I want to restart >>>>>>>>>> the graph. >>>>>>>>>> >>>>>>>>>> Actually I would love to have something like Akka Actors >>>>>>>>>> OneForOneStrategy(10, Duration.create("1 minute")),,,, >>>>>>>>>> >>>>>>>>>> I couldn't find the right hints in the docs. What I am trying >>>>>>>>>> right now is this pseudo code: >>>>>>>>>> >>>>>>>>>> Function<Throwable, Supervision.Directive> decider = exc -> >>>>>>>>>> Supervision.stop(); >>>>>>>>>> Sink sink = ....; >>>>>>>>>> >>>>>>>>>> RunnableGraph<Future<Integer>> runnableGraph = takeGraph.toMat(sink, >>>>>>>>>> Keep.right()); >>>>>>>>>> >>>>>>>>>> ActorMaterializer mat = >>>>>>>>>> ActorMaterializer.create(ActorMaterializerSettings.create(system).withSupervisionStrategy(decider), >>>>>>>>>> system); >>>>>>>>>> >>>>>>>>>> runnableGraph.run(mat).onComplete(new OnComplete<Integer>() { >>>>>>>>>> public void onComplete(Throwable failure, Integer value) { >>>>>>>>>> ActorMaterializer mat2 = >>>>>>>>>> ActorMaterializer.create(ActorMaterializerSettings.create(system).withSupervisionStrategy(decider), >>>>>>>>>> system); >>>>>>>>>> runnableGraph.run(mat2); >>>>>>>>>> } >>>>>>>>>> }, system.dispatcher()); >>>>>>>>>> >>>>>>>>>> Obviously the above code would only restart once... >>>>>>>>>> Anyway is this the right direction? >>>>>>>>>> Is there an idiomatic way to setup restart of an Runablegraph when a >>>>>>>>>> Exception happens >>>>>>>>>> >>>>>>>>>> Write now I am thinking of creating a Supervision Actor and use it >>>>>>>>>> to init and restart the Runablegraph >>>>>>>>>> >>>>>>>>>> Many Greetings >>>>>>>>>> John >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> -- >>>>>>>>>> >>>>>>>>>> Read the docs: http://akka.io/docs/ >>>>>>>>>> >>>>>>>>>> Check the FAQ: >>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html >>>>>>>>>> >>>>>>>>>> Search the archives: >>>>>>>>>> https://groups.google.com/group/akka-user >>>>>>>>>> --- >>>>>>>>>> You received this message because you are subscribed to the >>>>>>>>>> Google Groups "Akka User List" group. >>>>>>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>>>>>> send an email to akka-user+...@googlegroups.com. >>>>>>>>>> To post to this group, send email to akka...@googlegroups.com. >>>>>>>>>> Visit this group at https://groups.google.com/group/akka-user. >>>>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>>>> >>>>>>>>> >>>>>>>>> -- >>>>>>>> >>>>>>>>>> Read the docs: http://akka.io/docs/ >>>>>>>> >>>>>>>>>> Check the FAQ: >>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html >>>>>>>> >>>>>>>>>> Search the archives: >>>>>>>> https://groups.google.com/group/akka-user >>>>>>>> --- >>>>>>>> You received this message because you are subscribed to the Google >>>>>>>> Groups "Akka User List" group. >>>>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>>>> send an email to akka-user+...@googlegroups.com. >>>>>>>> To post to this group, send email to akka...@googlegroups.com. >>>>>>>> Visit this group at https://groups.google.com/group/akka-user. >>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> -- >>>>>>> Akka Team >>>>>>> Typesafe - Reactive apps on the JVM >>>>>>> Blog: letitcrash.com >>>>>>> Twitter: @akkateam >>>>>>> >>>>>> -- >>>>>> >>>>>>>>>> Read the docs: http://akka.io/docs/ >>>>>> >>>>>>>>>> Check the FAQ: >>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html >>>>>> >>>>>>>>>> Search the archives: >>>>>> https://groups.google.com/group/akka-user >>>>>> --- >>>>>> You received this message because you are subscribed to the Google >>>>>> Groups "Akka User List" group. >>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>> send an email to akka-user+...@googlegroups.com. >>>>>> To post to this group, send email to akka...@googlegroups.com. >>>>>> Visit this group at https://groups.google.com/group/akka-user. >>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> Akka Team >>>>> Typesafe - Reactive apps on the JVM >>>>> Blog: letitcrash.com >>>>> Twitter: @akkateam >>>>> >>>> -- >>>> >>>>>>>>>> Read the docs: http://akka.io/docs/ >>>> >>>>>>>>>> Check the FAQ: >>>> http://doc.akka.io/docs/akka/current/additional/faq.html >>>> >>>>>>>>>> Search the archives: >>>> https://groups.google.com/group/akka-user >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "Akka User List" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to akka-user+unsubscr...@googlegroups.com. >>>> To post to this group, send email to akka-user@googlegroups.com. >>>> Visit this group at https://groups.google.com/group/akka-user. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> -- >>> >>>>>>>>>> Read the docs: http://akka.io/docs/ >>> >>>>>>>>>> Check the FAQ: >>> http://doc.akka.io/docs/akka/current/additional/faq.html >>> >>>>>>>>>> Search the archives: >>> https://groups.google.com/group/akka-user >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "Akka User List" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to akka-user+unsubscr...@googlegroups.com. >>> To post to this group, send email to akka-user@googlegroups.com. >>> Visit this group at https://groups.google.com/group/akka-user. >>> For more options, visit https://groups.google.com/d/optout. >>> >> -- >> >>>>>>>>>> Read the docs: http://akka.io/docs/ >> >>>>>>>>>> Check the FAQ: >> http://doc.akka.io/docs/akka/current/additional/faq.html >> >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user >> --- >> You received this message because you are subscribed to the Google Groups >> "Akka User List" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to akka-user+unsubscr...@googlegroups.com. >> To post to this group, send email to akka-user@googlegroups.com. >> Visit this group at https://groups.google.com/group/akka-user. >> For more options, visit https://groups.google.com/d/optout. >> > > -- > >>>>>>>>>> Read the docs: http://akka.io/docs/ > >>>>>>>>>> Check the FAQ: > http://doc.akka.io/docs/akka/current/additional/faq.html > >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user > --- > You received this message because you are subscribed to the Google Groups > "Akka User List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to akka-user+unsubscr...@googlegroups.com. > To post to this group, send email to akka-user@googlegroups.com. > Visit this group at https://groups.google.com/group/akka-user. > For more options, visit https://groups.google.com/d/optout. > -- Cheers, √ -- >>>>>>>>>> Read the docs: http://akka.io/docs/ >>>>>>>>>> Check the FAQ: >>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user --- You received this message because you are subscribed to the Google Groups "Akka User List" group. 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