Thanks for the input. I wonder if anyone has tried Scala Pickling. At first glance, it seems like it would be a great solution.
On Tue, Oct 21, 2014 at 1:47 PM, Jeroen Gordijn <jeroen.gord...@gmail.com> wrote: > Hi, > > I'm not really sure yet about the best solution. Currently using json. It > starts out being really straight forward when using spray-json. Just create > the formatters. But the moment you have to deal with evolution, you have to > deal with the Json AST and you loose all help from your compiler. I'm > looking into a Protobuf implementation of the serializer. It will give the > overhead of having to specify a definition of each persistable message in a > proto file, but I guess it will help a lot with evolution. > > I found that I have to wrap my messages in a general envelope to indicate > which message was serialized. I could not use the Akka Persistence default > manifest as it indicates which Domain Class was persisted as opposed to the > protobuff class. > > Cheers, > Jeroen > > Op dinsdag 21 oktober 2014 17:31:32 UTC+2 schreef rrodseth: >> >> Thanks for the references, Patrik. I hope others will share their >> experiences. >> >> On Tue, Oct 21, 2014 at 4:57 AM, Patrik Nordwall <patrik....@gmail.com> >> wrote: >> >>> Hi Richard, >>> >>> I'm also interested in what others are currently using. >>> >>> On Sun, Oct 19, 2014 at 3:35 AM, Richard Rodseth <rrod...@gmail.com> >>> wrote: >>> >>>> I'm hoping to build a case for using Akka Persistence, and expect the >>>> event schema evolution to be a sticking point. People are quite used to >>>> their database migration scripts. >>>> >>>> I've seen the threads on this list, but I'm wondering what the current >>>> thinking is on the least painful option, and would also like pointers to >>>> sample code. >>>> >>> >>> I have not heard of any new ideas. Migration and data evolution can be >>> implemented in a custom serializer. >>> >>> >>>> Do Protobuf, Avro and Thrift all require an IDL compiler? >>>> >>> >>> Protobuf and Thrift, yes. I'm not sure about Avro. I think it can be >>> used without generated code. >>> >>> >>>> Is Cap'n Proto a viable option? >>>> >>> >>> Yes, it looks interesting, especially for high performance, but I have >>> no experience of it. >>> In same category you also have SBE and FlatBuffers. Here is a nice >>> comparison >>> <https://kentonv.github.io/capnproto/news/2014-06-17-capnproto-flatbuffers-sbe.html> >>> . >>> >>> >>>> Would something based on Scala macros provide a way to avoid an extra >>>> compilation? >>>> >>> >>> Scala Pickling <https://github.com/scala/pickling>. I don't have much >>> experience of it, and I'm uncertain of how mature it is. >>> >>> >>>> >>>> Anything on the horizon I should know about? >>>> >>> >>> JSON is well known and has the nice property of being schema-less. CBOR >>> <https://www.rfc-editor.org/info/rfc7049> has similar characteristics >>> but has the advantages of a binary format. I have played with the >>> jackson-dataformat-cbor >>> <https://github.com/FasterXML/jackson-dataformat-cbor> tool and here is an >>> example of an Akka serializer >>> <https://github.com/typesafehub/activator-akka-cluster-sharding-scala/pull/8/files>. >>> That sample is using a low level API, with all the advantages of full >>> control and possibilities of data migration. The drawback is of course the >>> amount of hand written mapping code. I expect that it will be possible to >>> also use other high level tools with CBOR, such as Jackson Databinding and >>> Play-json <https://www.playframework.com/documentation/2.3.x/ScalaJson>. >>> >>> Cheers, >>> Patrik >>> >>> >>>> >>>> Thanks. >>>> >>>> -- >>>> >>>>>>>>>> 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 http://groups.google.com/group/akka-user. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> >>> >>> -- >>> >>> Patrik Nordwall >>> Typesafe <http://typesafe.com/> - Reactive apps on the JVM >>> Twitter: @patriknw >>> >>> -- >>> >>>>>>>>>> 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 http://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 http://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. 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