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document-haness/docs/clean-architecture-backend-template/tech-log-studio/schema-and-wire-models/concept/concept-messaging-schema-protobuf-c01.md
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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2.3 KiB
Markdown

---
kind: CONCEPT
slug: messaging-schema-protobuf-c01
title: 소비자가 계약을 등록하려면 vendor 타입을 이름 불러야 한다
topic: schema-and-wire-models
project: clean-architecture-backend-template
status: 게시 전
sourceRevision: 21234e38cdb9a926cbc92bb97a2aee2e4a7d2916
rootTreeNode: concept:messaging-schema-protobuf-c01
evidenceCapturedOn: 2026-09-01
assets:
- key: messaging-schema-protobuf-c01
file: ../../../final/evidence/rendered/messaging-schema-protobuf-c01.svg
evidence:
- ../../../final/evidence/raw/messaging-schema-protobuf-c01.txt
source:
- 원본 분석 절은 analysis/messaging/messaging-schema-protobuf.md#L49 이다.
module: messaging-schema-protobuf
---
# 소비자가 계약을 등록하려면 vendor 타입을 이름 불러야 한다
선택적 Protobuf codec. runtime_memberships: []이고 starter의 codec registry에도 등록되지 않는다 — build-only / incubating.
## 관계
- **검증되지 않는 스키마 파일은 문서임을 파일 안에 적는다**
같은 분석 리프에서 끌어낸 규칙이다.
- **신뢰할 수 없는 입력 쪽 경계를 먼저 테스트한다**
같은 분석 리프에서 끌어낸 규칙이다.
## 본문
<!-- body:start -->
선택적 Protobuf codec. `runtime_memberships: []`이고 starter의 codec registry에도 등록되지 않는다 — build-only / incubating.
## 이 기록이 다루는 범위
:::evidence key="messaging-schema-protobuf-c01" alt="코드베이스에서 파일 목록을 만든 출력 2줄. 이 기록이 다루는 범위가 그 목록이다." caption="코드베이스 파일 목록 — 2줄 · exit 0" zoom="true"
:::
## protobuf를 api로 선언한 근거
build.gradle 주석에 있다. `src/messaging/CLAUDE.md:40-43`의 vendor `api` 게이트를 통과한다 — `ProtobufMessageContract(Class<? extends Message>, Parser<? extends Message>)`가 public record이므로 소비자가 그 타입을 이름 부르지 않고는 계약을 등록할 수 없다.
## 이 leaf의 핵심 문제 인식
클래스 javadoc이 한 문장으로 적는다. `messaging-schema-avro`의 "does not fail — it produces plausible garbage"와 같은 성질이다. **JSON은 틀린 스키마로 디코딩하면 대개 실패하고, Avro와 Protobuf는 실패하지 않는다.** 그래서 두 leaf 모두 registry를 계약의 중심에 둔다.
<!-- body:end -->