Hi, Akka 2.4 is coming, bringing with it Persistence Queries, which for the most part look really great. However, there are some issues with it that I find problematic.
The first regards dependencies - 2.4.0 deprecates PersistentView, but the recommended classes are part of an entirely different module, and that is still experimental. On top of that, the new module depends on the stream module, which is itself experimental. So what is someone more conservative supposed to use? The second issue is about migration from 2.3 to 2.4. In our application, for example, we created stream Sources that wrap a PersistentView. Obviously, there are a lot of drawbacks to this approach compared to the Query approach, but there are advantages as well (for example: we don't care which persistence plugin is used, and we know exactly which "queries" are supported - all events belonging to a persistenceId). Now, if we decide to migrate to 2.4, "our" classes become deprecated (or rather, use deprecated APIs). We could switch to a Query-based implementation, but then we have to contend with the issue of when (if at all) plugins are updated to support the new API. Bottom line, the way it looks right now, it would be hard for me to justify switching over to using the new query API at the moment (even though I *really* want to), so at least I hope PersistentViews won't go anywhere anytime soon. Tal -- >>>>>>>>>> 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.
