Hi Alejandro,



You have a number of options




- when you have a single persistence Id, write a view for that

- when you want to aggregate events of several persistence ids, you can do so 
via the event store (approach of Martin (with Kafka) and Greg (event store) )

 Or you can aggregate the changes to a message queue and read that

 Or you can aggregate via another persistent actor that publishes the fact that 
something has changed for a specific other persistence id and start a view for 
that id (my approach)




And there may be other ways to solve this of course.




Kind regards,




Olger

On Fri, May 8, 2015 at 1:07 PM, Alejandro López <[email protected]>
wrote:

> Right now, what would be the best alternative in order to create 
> projections, allowing views to subscribe to arbitrary events as described 
> by Roland above? (or at least a coarse approximation)
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