I've personally implemented something similar using CQRS. In Akka that
roughly translated to an Actor for reading data and an Actor for writing
data (using Futures to wrap the actual repository interaction). The actual
implementation had a bit more meat to it but the general idea was an Actor
for each type of transaction.
I originally got the idea from a BoldRadius presentation by Mike Nash which
can be found
Well worth the read
On Monday, September 19, 2016 at 9:13:52 AM UTC-4, Love Hasija wrote:
> I am trying to create a domain driven repository using Akka. However, i am
> confused with regard to what the ideal design should look like.
> I have domain objects like Entity and a repository needs to be created
> with various interfaces like findByXYZ() and add().
> The requirement for individual repository operations like findByXYZ and
> add are that these operations are multi-step and includes state in them. As
> an example, a pseudo code for findByXYZ would be:
> - findByX
> - findByY
> - findByZ
> - Aggregate
> - Get the resulting data.
> The way i approached this, is by creating a single worker actor that
> triggers a workflow by invoking futures for each of steps defined above and
> invoking respective messages to itself. As all the results are obtained,
> the results are accumulated and returned back.
> However, what I am wondering is that:
> 1) Are future compositions not enough for this, do we really need an
> actor. The advantage I see is alternative corrective path if required.
> 2) The single actor is performing multiple types of workflows, for eg:
> 1 for adding new record, 1 for finding. However, this is creating a big
> actor. Can multiple actors be created for each type of command messages.
> Any help would be greatly appreciated.
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