Event-Driven Architecture
Master events vs commands, pub/sub patterns, and the fundamentals of event sourcing for building reactive systems.
Most applications start with a straightforward request-response model: the user clicks a button, the server processes the request, and the response comes back. This works until your system needs to do ten things in response to a single action. Place an order and you need to charge the card, update inventory, send a confirmation email, notify the warehouse, update analytics, and trigger a loyalty points calculation.
When you try to do all of that synchronously in a single request handler, you get slow responses, brittle code, and cascading failures. Event-driven architecture is the antidote.
Events vs Commands
The distinction between events and commands is foundational, and getting it wrong leads to architectural confusion.
A command is a request to do something. It is directed
This lesson is part of the Guild Member curriculum. Plans start at $29/mo.