22 aug 2014 kl. 11:42 skrev Olger Warnier <[email protected]>: > Quite a read on a phone during my holidays. Very insightful and adds a lot of > considerations around the different topics. > > I'd like to mention that the current construct of the persistent view is very > helpful in decoupling. I can create new listeners (e.g. PersistentView) based > on the events persisted in the store. > > Tags were proposed and I would be using those to actually attach the > aggregate root type to the event so my persistent views would use that to > 'read' the events and create the model. That model is used for the queries in > the application (or for other purposes) > > At this moment, I persist all changes on a an aggregate root (persistent > actor for a specific instance) by writing a changed event with a specific > persistenceId in the payload (of the aggregate root) to a generic > persistenceId and use that to create a persistent view that uses the specific > aggregate root Id as persistenceId (discussed in another group topic). > > When tags are not the way forward, there is a need for some kind of > query/resolver mechanism that allows to define what the persistentview is > listening to. In my use case, the persistent actor is a cluster sharded actor > and the persistenceId is actually the unique identifier of an instance of an > aggregate root. My view would want to listen to the all events persisted by > this type of aggregate root. (So that meta data needs to be available too)
Thanks for contributing this use-case, we think that we incorporated it in our proposal but it would be good to cross check and remove any possible misunderstandings. Regards, Roland > > Kind regards, > > Olger > > Btw: repost, sloooow internet in the mountains. > > -- >>>>>>>>>>> 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 [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/akka-user. > For more options, visit https://groups.google.com/d/optout. Dr. Roland Kuhn Akka Tech Lead Typesafe – Reactive apps on the JVM. twitter: @rolandkuhn -- >>>>>>>>>> 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout.
