DongHyeonkaandClaude Opus 5
b2963105a8
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>
47 lines
2.0 KiB
Markdown
47 lines
2.0 KiB
Markdown
---
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kind: CONCEPT
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slug: adapter-inbound-web-c15
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title: 상관 식별자를 만드는 필터가 세 벌이다
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topic: observability-models
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project: clean-architecture-backend-template
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status: 게시 전
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sourceRevision: 21234e38cdb9a926cbc92bb97a2aee2e4a7d2916
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rootTreeNode: concept:adapter-inbound-web-c15
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evidenceCapturedOn: 2026-09-01
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assets:
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- key: adapter-inbound-web-c15
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file: ../../../final/evidence/rendered/adapter-inbound-web-c15.svg
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evidence:
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- ../../../final/evidence/raw/adapter-inbound-web-c15.txt
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source:
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- 원본 분석 절은 analysis/14-adapter-inbound-web.md#L1108 이다.
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module: adapter-inbound-web
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---
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# 상관 식별자를 만드는 필터가 세 벌이다
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`WebMvcRequestIdFilter`·`RequestLoggingFilter`·`WebFluxRequestContextFilter` 셋이 상관 식별자를 각각 만든다. 세 번째는 전송이 달라 공존이 정상이고, 앞의 둘은 같은 서블릿 체인에서 같은 헤더를 두 번 처리한다.
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## 본문
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<!-- body:start -->
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상관 식별자를 만드는 메커니즘이 셋이다.
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| 메커니즘 | 헤더 | 저장 위치 |
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|---|---|---|
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| `WebMvcRequestIdFilter` | `X-Request-Id`, `traceparent` | 요청 속성(`WebRequestId`/`WebTraceId`) |
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| `RequestLoggingFilter` | `X-Request-Id`, `X-Correlation-Id`, `traceparent` | MDC |
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| `WebFluxRequestContextFilter` | `X-Request-Id`, `traceparent` | Reactor context |
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## RequestLoggingFilter 참조 위치
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:::evidence key="adapter-inbound-web-c15" alt="코드베이스에서 RequestLoggingFilter 를 검색한 출력 22줄. 이 기록이 세는 참조가 그 출력에 그대로 보인다." caption="RequestLoggingFilter 코드베이스 검색 — 22줄 · exit 0" zoom="true"
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:::
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## 서블릿 체인에서 같은 헤더가 두 번 처리된다
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세 번째는 전송이 달라 공존이 정상이다. 앞의 둘은 같은 서블릿 체인에서 같은 헤더를 두 번 처리한다. `traceparent`도 마찬가지로 두 번 파싱되며, `RequestLoggingFilter`는 응답에도 `traceparent`를 쓰고(`:68`) `WebMvcRequestIdFilter`는 쓰지 않는다.
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<!-- body:end -->
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