Additional Notes
Why should a checkout flow fail fast before expensive work starts?
Track: Java
Topic: Exceptions
Focus: Fail Fast Validation
Java: Fail Fast Validation
Answer
Rejecting invalid input or impossible state before expensive work starts.
Fail-fast validation keeps bad state from spreading deeper into the system. In checkout flows, that usually means validating quantities, cart state, and required inputs before inventory reservation or payment calls.
Fail-fast validation keeps bad state from spreading deeper into the system. In checkout flows, that usually means validating quantities, cart state, and required inputs before inventory reservation or payment calls.
Topics: Exceptions Fail Fast Validation Java