Validation in the cmd handler is one thing - receiveRecover and cmd
handlers might use the same "apply state", but what it seems you suggest is
that there is no difference between applying events and creating events.
Big difference wrt. validation and replying in persist callback.
On Friday, June 26, 2015 at 8:20:30 AM UTC+1, Amir Karimi wrote:
>
> Hi,
>
> Consider the following receives methods of a PersistentActor:
>
> override def receiveRecover: Receive = {
> case CityAdded(v) => addCity(v)
> case CityRemoved(v) => removeCity(v)
> }
> override def receiveCommand: Receive = {
> case AddCity(c) => persist(CityAdded(c))(event => addCity(event.cityId))
> case RemoveCity(c) => persist(CityRemoved(c))(event =>
> removeCity(event.cityId))
> }
>
> We can call receiveRecover inside the persist block which is more DRY.
> Like this:
>
> override def receiveRecover: Receive = {
> case CityAdded(v) => addCity(v)
> case CityRemoved(v) => removeCity(v)
> }
> override def receiveCommand: Receive = {
> case AddCity(c) => persist(CityAdded(c))(receiveRecover(_))
> case RemoveCity(c) => persist(CityRemoved(c))(receiveRecover(_))
> }
>
>
> Is it correct? I didn't see anyone do that. What is the problem?
>
> Regards,
> Amir
>
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