intermediate~2h
Exception Handling & Validation
A REST API that returns a raw stack trace as a 500 response is unfinished. This module is how to make failure a first-class, designed part of your API contract.
Learning objectives
- Beginner: A single @RestControllerAdvice handling one or two custom exception types plus a catch-all, for a small API.
- Intermediate: A full exception hierarchy (e.g. a base ApiException with subclasses per error category) mapped consistently to the right HTTP status, with structured field-level validation errors.
- Advanced: Error responses that include a machine-readable error code (for client-side logic to branch on) separate from the human-readable message, plus correlation/trace IDs for tying a client-reported error back to server logs.
This is a Pro chapter
Sign in, then upgrade to Pro or Power to unlock this and the full Spring Ecosystem Mastery library.
Exception Handling & Validation