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document-haness/docs/clean-architecture-backend-template/final/evidence/raw/a06-f011-mongoregexpolicy-forbidden.txt
T
DongHyeonkaandClaude Opus 5 b2963105a8 docs(keycloak-session-store): import the session-storage lab as a new project
The keycloak project ended with four open questions that design could not
settle. A two-VM lab was built to answer them by measurement, and this is
that material: 26 experiments, 125 raw command outputs, 22 browser captures.

Follows the import procedure in README.md.

  source/     the originating repository verbatim — 78 documents, 28 SVGs,
              8 manifests, plus .source-revision recording the commit
  final/      the SSOT
    document.md   729 lines written from the 29 experiment documents, not
                  concatenated: what was predicted, what was measured, and
                  where the measurement itself was wrong
    evidence/raw    125 outputs, flattened to <experiment>__<file> because
                    the originals collided (01-baseline.txt appeared three
                    times) and the audit only globs the top level
    evidence/meta   one per raw file; command and exitCode are null and the
                    README says why rather than inventing them
    evidence/browser  22 captures
    assets/       three diagrams through techviz
    .techviz/     their VizSpecs

A separate project rather than an addition to keycloak: the B-layer answers
that project's four questions, but the A, C and D layers are about cluster
failure, SSO and operations, and one document.md should hold one subject.
The four question records there can point here through 관계.

Recorded rather than papered over: only three of the 28 diagrams were
remade. The repository forbids hand-drawn SVG and forbids titles inside the
canvas; all 28 originals carry both, so converting them is redrawing, not
reformatting. They stay in source/ and the gap is written into the document.

verify-pipeline.py passes. audit-records.py reports no issues.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-09-04 22:51:59 +09:00

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# 두 팩토리가 만드는 값
/** The platform default policy. */
public static MongoRegexPolicy standard() {
return new MongoRegexPolicy(DEFAULT_MAX_LENGTH, Set.of('i'), true);
}
/** A policy that forbids regular expressions entirely. */
public static MongoRegexPolicy forbidden() {
return new MongoRegexPolicy(1, Set.of(), true);
}
# validate 의 네 검사
public void validate(String pattern, String flags) {
Objects.requireNonNull(pattern, "pattern");
Objects.requireNonNull(flags, "flags");
requireWithinLength(pattern);
for (int index = 0; index < flags.length(); index++) {
char flag = flags.charAt(index);
if (!allowedFlags.contains(flag)) {
throw MongoOperationRejectedException.of(
"query.regex", "regex flag '" + flag + "' is not allowed by this collection's policy");
}
}
if (requireAnchored && !pattern.startsWith("^")) {
throw MongoOperationRejectedException.of(
"query.regex",
"the pattern is not anchored at the start, so it cannot use an index and will scan the "
+ "collection");
}
if (hasNestedQuantifier(pattern)) {
throw MongoOperationRejectedException.of(
"query.regex",
"the pattern nests quantifiers, which can take exponential time to evaluate");
}
# 길이 검사가 쓰는 비교
private String requireWithinLength(String pattern) {
if (pattern.length() > maxLength) {
throw MongoOperationRejectedException.of(
"query.regex",
"the pattern is " + pattern.length() + " characters, above the limit of " + maxLength);
# forbidden() 을 부르는 곳 전수
(선언 자리 말고는 없음)
# withRegexPolicy 를 부르는 곳 전수
test/java/dev/caskeleton/adapter/outbound/mongo/query/PolicyAwareMongoQueryBuilderTest.java:87: .withRegexPolicy(MongoRegexPolicy.standard());
main/java/dev/caskeleton/adapter/outbound/mongo/query/MongoQueryPolicy.java:83: public MongoQueryPolicy withRegexPolicy(MongoRegexPolicy policy) {
# MongoQueryPolicy 를 만드는 곳 전수
test/java/dev/caskeleton/adapter/outbound/mongo/query/PolicyAwareMongoQueryBuilderTest.java:20: MongoQueryPolicy.allowingFields("status", "createdAt", "_id");
test/java/dev/caskeleton/adapter/outbound/mongo/query/PolicyAwareMongoQueryBuilderTest.java:38: MongoQueryPolicy.allowing(
test/java/dev/caskeleton/adapter/outbound/mongo/query/PolicyAwareMongoQueryBuilderTest.java:83: MongoQueryPolicy.allowing(
test/java/dev/caskeleton/adapter/outbound/mongo/query/PolicyAwareMongoQueryBuilderTest.java:110: MongoQueryPolicy.allowing(
test/java/dev/caskeleton/adapter/outbound/mongo/query/LiteralSearchIsExpressibleTest.java:28: MongoQueryPolicy.allowing(
# 자동 구성이 query 패키지에서 만드는 빈
307- @ConditionalOnMissingBean
308: public MongoBudgetEnforcer mongoBudgetEnforcer() {