[Salgat]

It's a type of event driven architecture, since events generated both hydrate models and trigger event listeners/subscribers. For example, a command to update a customer's address might also have a process manager listening for that event that kicks off a process to send an email notification. That same event is still used to event source the customer model which includes an address.

I suppose you could have event sourcing in a purely isolated manner where the events aren't used for anything else, but you'd be severely limiting the advantages that come free with that.

[therealdrag0]

That’s what I mean. I worked on services that have event sourced db model but synchronous REST API. And I’ve worked on services that communicate with events for IPC but use relational sql for data store.

Your example uses the same events for both so sure that can be done but doesn’t have to. I haven’t worked on a system like that personally so maybe it can fine.

But honestly I’m a bit skeptical since that removes services’ data sovereignty. Sounds like the recipe for “distributed monolith” architecture. And actually I just remembered another team at my company is ripping out their use of kafka as their data source on a green field project cuz it was a disaster, so skepticism emphasized.