It got me wondering, are people out there spinning up new systems and internationally not following that pattern?
I'm trying to understand if a sea change in architecture has occurred or whether I'm in a bubble and not appreciating all the different approaches that are generally being used in the industry today.
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.
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[1] https://martinfowler.com/eaaDev/EventSourcing.html
[2] https://martinfowler.com/bliki/CQRS.html
[3] The Many Meanings of Event-Driven Architecture • Martin Fowler • GOTO 2017
https://www.youtube.com/watch?v=STKCRSUsyP0
What do you mean by “Event-Driven”?
https://martinfowler.com/articles/201701-event-driven.html
tagged by: event architectures
Long answer: The problems with distributed systems are plenty and are only worth it if the distribution itself is a key feature, because for example your system has to scale for millions of users around the world.