Question

Using Ncqrs, is there a way to replay every single event ever happened (all aggregate types) and feed these through my denormalizers in order to recreate the whole read model from scratch?

Edit:

I though it’s be good to provide a more specific use case. I’m building this inside a ASP.NET MVC application and using Entity Framework (Code first) for working with the read models. In order to speed up development (and because I’m lazy), I want to use a database initializer that recreates the database schemas once any read model changes. Then using the initializer’s seed method to repopulate them.

Answer 1

What I ended up doing is the following. At the service startup, before any commands are being processed, if the read model has changed, I throw it away and recreate it from scratch by processing all past events in my denormalizers. This is done in the database initializer’s seed method.

This was a trivial task using the MS SQL event storage as there was a method for retrieving all events. However, I’m not sure about other event storages.