The Many Meanings of Event-Driven Architecture • Martin Fowler • GOTO 2017

You're right about microservices, but IMO you're mistaken Event Sourcing (CQRS/ES)[1,2] with EDA (Event-Driven Architectures)[3] in general. There are many different types of EDAs. There are at least 3 relevant dimensions when choosing a Software Architecture: 1. complexity of the domain 2. scalability requirements 3. company stage / number of developers working on the same codebase Microservices are mostly solving #3, and to a lesser extent #2. They mostly solve the problem of too many developers blocking each other on a monolithic codebase (NOTE: monolithic doesn't mean non-modular). Event Sourcing and friends (DDD, CQRS, EventStorming, etc.) are mostly solving #1. It's also technology/vendor-agnostic, so makes migration to other tech (including microservices) easier, and most importantly possible at all. So for a complex domain in a small company I would choose a CQRS/ES monolith, but for a simple domain and high scalability in a large company maybe CRUD-based microservices are making more sense. -- [1] link [2] link [3] The Many Meanings of Event-Driven Architecture • Martin Fowler • GOTO 2017 ▶ this video What do you mean by “Event-Driven”? link tagged by: event architectures link

I think that one was good: - ▶ this video I wasn't able to find any other talk I watched back then or any of the stuff I did read, but I then last time I looked into talks and reading material about this was ~2.5 Years ago and while a lot of new software and tooling was done since then the principles didn't change. Try some of the other GOTO; talks about it if you like listening to talks, they tend to be quite good. This was interesting as far as I remember but not what I was looking for: - link

I think Fowler would describe the model in the article as more like "Event-carried State Transfer": ▶ this video .

As a first-class language feature this goes back at least to 1985 and Linda link and tuplespaces. (You'd know about Linda already if you'd read Concepts, Techniques, and Models of Computer Programming . Don't delay, read CTM today: link ) And here's a Martin Fowler talk about the practise of implementing it informally as a pattern or framework: ▶ this video