Re: [akka-user] [akka-persistence] readjournal query by multiple tags

[Patrik Nordwall]

Depending on the data store I think that can be rather difficult to
implement. A persistence query plugin may implement any queries and I think
this is an excellent plugin specific extension for those plugins that can
implement it without trouble.

Regards,
Patrik

On Mon, Oct 31, 2016 at 8:39 PM,  wrote:

> Is there a feature (planned?) to support querying the read journal by
> multiple tags. Typically projections in an event sourced application only
> update from a very small subset of the events. Say I have a UserProjection
> that creates/updates a UserReadModel from a UserRegistered event and all
> other User* events don't affect that read model. In this case it would be
> useful to have a queryByTags(Seq("UserRegistered"), ) method on the
> read journal which would make (re)building that projection much more
> efficient.
>
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-- 

Patrik Nordwall
Akka Tech Lead
Lightbend  -  Reactive apps on the JVM
Twitter: @patriknw

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[akka-user] [akka-persistence] readjournal query by multiple tags

[jsoeters]

Is there a feature (planned?) to support querying the read journal by 
multiple tags. Typically projections in an event sourced application only 
update from a very small subset of the events. Say I have a UserProjection 
that creates/updates a UserReadModel from a UserRegistered event and all 
other User* events don't affect that read model. In this case it would be 
useful to have a queryByTags(Seq("UserRegistered"), ) method on the 
read journal which would make (re)building that projection much more 
efficient.

-- 
>>  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
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