Hi Ryan,
On 05.03.14 21:35, Ryan Bair wrote:
I'm working on a project where I would like to retain a history of
actions performed against an entity and then leverage that history for
business (what actions led the user to do X) as well as providing the
user with information about past actions.
Event Sourcing seems like it would provide a good way to accomplish
this as the events are produced and stored as a regular part of the
application flow, removing the need to do separate bookkeeping. I'm
really impressed by Martin's work on the new Persistence module (and
Eventsourced before it) and would like to move in that direction.
However, I don't see a way to query the `journal` other than through
recovery.
Does it make sense to grow Persistence in this direction, or is there
a better way to tackle what I am attempting? Perhaps simply querying
the underlying data store directly?
Generating query/read models (by projecting an event stream onto an
in-memory data structure, tables in a database, or whatever) is an
application-level concern. Akka-persistence is not meant to be a
database with a query interface. Seems that Datomic is closer to what
you're looking for.
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