The many meanings of event-driven architecture - Martin Fowler

https://www.youtube.com/watch?v=STKCRSUsyP0

[ ] Article: What do you mean by “Event-Driven”?

4 patterns under the name of 'Event Driven'

1) Event Notification

+ reverse coupling

+ first class

+ flexibility of adding

- no overview in code

events vs commands

command: response, I want this to happen

2) Event-carried State Transfer

+ decoupling

+ availability

no more calls

no dependency

less calls

reduce load

- send all needed data

- copying of data

- eventual consistency

3) Event Sourcing

cf git

cf accounting

events + snapshots

alternative state: tweak event on branch, diff state, apply diff

memory image: in memory state, no db

asynchrony is not required

4) CQRS

Article which inspired this talk

https://martinfowler.com/articles/201701-event-driven.html

What do you mean by “Event-Driven”?