Hi George! I’ll start with the infameous “it depends”, but let’s get into a more constructive answer :-)
As updateState is not really something akka forces you to do - it’s simply a pattern we’ve found to be useful. The core of it is “a method which you can call from both `receiveCommand` and `receiveRecover`”. I’d split methods in terms of “does interactions with outside world and should not be triggered on recovery” and “does not trigger interactions with outside world”. But for example if you create child actors as part of your domain logic, you will want to trigger this during replay - to be ready for an incoming request which needs them etc. I for one would not put much logic into events. I tend to keep them as simple as markers that “stuff happened” - when actions need to be made, I’d use actors to do them. Putting a require() or two in there may be ok, but I wouldn’t put more complicated stuff into an event - it’s some actor that would “perform” the work. As for commenting Martin’s quote, by Command he means “incoming message” (as does our PersistentActor#receiveCommand), and by Event he means “the event that the Persistent Actor has persisted, as effect of that incoming command”. This means: command comes in, apply some logic to it, store “result” of that logic as event (SignedUp / UserNameTaken etc.), and act upon this event (once it’s persisted safely). So the logic leads to storing of events. I hope this helps, feel free to ask more or give examples of what you’d need :-) Happy hakking! -- Konrad 'ktoso' Malawski hAkker @ typesafe http://akka.io -- >>>>>>>>>> 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 http://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout.
