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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
This commit is contained in:
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/scripts/demo-silent-500.sh
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#!/usr/bin/env bash
# Is the unexpected exception LOGGED? Counts log lines mentioning it after one request.
# -> docs/output/silent-500.txt
set -uo pipefail
source "$(dirname "$0")/env.sh"
probe() { # label, profiles, extra args, path, header
local label="$1" profiles="$2" extra="$3" path="$4" header="${5:-}"
EXTRA_ARGS="$extra" "$MODULE_DIR/scripts/run.sh" "$profiles" || exit 1
local before; before=$(wc -l < "$LOG")
curl -s -o /dev/null ${header:+-H "$header"} "$BASE$path"
sleep 1
local lines; lines=$(tail -n +"$((before+1))" "$LOG" | grep -v 'Picked up JAVA_TOOL_OPTIONS')
local errors; errors=$(echo "$lines" | grep -c ' ERROR ' || true)
local traces; traces=$(echo "$lines" | grep -c '^ at ' || true)
printf '%-58s ERROR lines: %-3s stack frames: %s\n' "$label" "$errors" "$traces"
echo "$lines" | grep ' ERROR ' | sed 's/^.* ERROR / ERROR /' | cut -c1-200 | head -2
}
{
echo "# One request to an endpoint that throws IllegalStateException. What reaches the log?"
echo
probe "defaults (Boot /error)" "" "" /orders/boom
probe "boot-flag" "boot-flag" "" /orders/boom
probe "advice, catch-all logs with errorId" "advice" "" /orders/boom
probe "advice, catch-all WITHOUT the log line" "advice" "--demo.problems.log-unhandled=false" /orders/boom
probe "catchall-first (returns 500, never logs)" "catchall-first" "" /orders/boom
echo
echo "# And for an exception thrown by a servlet filter (never reaches any advice):"
echo
probe "advice,errors - filter exception" "advice,errors" "" /orders/1 "X-Tenant: BAD!"
} > "$OUT/silent-500.txt"
"$MODULE_DIR/scripts/stop.sh"
cat "$OUT/silent-500.txt"