Building a Scalable Order Management System with CQRS, Event Sourcing, and Axon Framework

An Order Management System (OMS) is the textbook example of where CQRS (Command Query Responsibility Segregation) and Event Sourcing truly shine.

In a real-world e-commerce OMS:

Reads outnumber writes: Customers check their order status 100x more often than they actually place an order.

Complex Business Rules: An order cannot be shipped before payment is confirmed; an order cannot be cancelled after it has shipped.

Auditability: You need a perfect, immutable history of what happened to an order and when.