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Add problem-details: global exception handling with RFC 9457

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Companion code for "Global Exception Handling with ProblemDetail (RFC 9457)
in Spring Boot 4". Thirteen failures under five handling setups (Boot
defaults, the Boot flag, a ResponseEntityExceptionHandler advice, advice
plus an ErrorController, a catch-all ordered first), validation errors,
i18n, content negotiation, Security's 401/403, silent 500s and decoding
on the client. 16 tests pin the behaviour.

Co-Authored-By: Claude Opus 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01C3TETMrqVUWeFkNtz3Jbo3
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asmhatre
2026-09-11 17:12:22 +00:00
co-authored by Claude Opus 5
parent a065696478
commit 926250e1a9
63 changed files with 2414 additions and 0 deletions
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problem-details/docs/output/ambiguous-handler.txt
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# Profile: ambiguous (exit code 1)
Caused by: java.lang.IllegalStateException: Ambiguous @ExceptionHandler method mapped for [ExceptionHandler{exceptionType=org.springframework.web.bind.MethodArgumentNotValidException, mediaType=*/*}]:
{org.springframework.http.ProblemDetail com.ankurm.problems.advice.AmbiguousExceptionHandler.invalid(org.springframework.web.bind.MethodArgumentNotValidException),
public final org.springframework.http.ResponseEntity org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler.handleException(java.lang.Exception,org.springframework.web.context.request.WebRequest) throws java.lang.Exception}