Additional Notes
Why do multi-object invariants matter?
Track: Java
Topic: OOP
Focus: Object Responsibility
Java: Object Responsibility
Answer
Because correctness can depend on keeping several objects in sync together.
A cart and a product can each look valid on their own while still being inconsistent together. Operations like reserving stock and adding cart items need an order that keeps the overall model truthful.
A cart and a product can each look valid on their own while still being inconsistent together. Operations like reserving stock and adding cart items need an order that keeps the overall model truthful.
Topics: Java Object Responsibility OOP