advanced~2h
Securing Exceptions & Custom Errors
Module 10 built centralized exception handling for your business logic. Security exceptions are thrown from inside the filter chain — before your @ControllerAdvice even runs — so they need their own handling path.
Learning objectives
- Beginner: Explain why an exception thrown inside the security filter chain never reaches a @ControllerAdvice handler.
- Intermediate: Implement a custom AuthenticationEntryPoint and AccessDeniedHandler that return consistent JSON errors instead of a default HTML page.
- Advanced: Keep the error response shape identical across business-logic exceptions and security exceptions, so API consumers see one consistent error contract everywhere.
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Securing Exceptions & Custom Errors