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document-haness/docs/clean-architecture-backend-template/final/evidence/rendered/a06-f003-change-streams-true.svg
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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<svg xmlns="http://www.w3.org/2000/svg" width="1200" height="1426" viewBox="0 0 1200 1426" role="img">
<title>terminal evidence</title>
<desc>Terminal-style rendering generated from retained command output. Sensitive-looking values are redacted in the visual asset.</desc>
<rect x="1" y="1" width="1198" height="1424" rx="14" fill="#0d1117" stroke="#30363d"/>
<rect x="1" y="1" width="1198" height="44" rx="14" fill="#161b22"/>
<rect x="1" y="30" width="1198" height="14" fill="#161b22"/>
<circle cx="24" cy="22" r="6" fill="#ff5f57"/>
<circle cx="44" cy="22" r="6" fill="#febc2e"/>
<circle cx="64" cy="22" r="6" fill="#28c840"/>
<text x="92" y="27" fill="#8b949e" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace">terminal evidence</text>
<text x="24" y="68" fill="#c9d1d9" font-size="15" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">$ S=src/adapter/outbound/persistence-mongo/src/main/java/dev/caskeleton/adapter/outbound/mongo
echo &#x27;# 컴팩트 생성자가 </tspan><tspan x="24" dy="22">네 입력을 세 방식으로 처리한다&#x27;
sed -n &#x27;43,66p&#x27; $S/autoconfigure/MongoPlatformSettings.java
echo
echo &#x27;# 시작 검증기의 </tspan><tspan x="24" dy="22">변경 스트림 분기&#x27;
grep -n -A2 &#x27;changeStreamsEnabled &amp;&amp;&#x27; $S/autoconfigure/MongoStartupValidator.java
echo
echo &#x27;# 그 </tspan><tspan x="24" dy="22">분기가 내는 문장이 저장소에 나오는 곳 전수&#x27;
grep -rn &#x27;change streams are enabled&#x27; --include=*.java src | sed &#x27;s#&#x27;&quot;$S&quot;&#x27;/#</tspan><tspan x="24" dy="22">…/#&#x27;
echo
echo &#x27;# changeStreams 라는 이름이 나오는 곳 전수 (다른 타입의 동명 정적 팩터리 포함)&#x27;
grep -rn &#x27;\.changeStre</tspan><tspan x="24" dy="22">ams()&#x27; --include=*.java src | grep -v &#x27;/build/&#x27; | sed &#x27;s#src/adapter/outbound/persistence-mongo/src/##&#x27;
echo
echo &#x27;# Mo</tspan><tspan x="24" dy="22">ngoStartupValidator 를 만드는 곳 전수&#x27;
grep -rn &#x27;new MongoStartupValidator&#x27; --include=*.java src | grep -v &#x27;/build/&#x27; | s</tspan><tspan x="24" dy="22">ed &#x27;s#src/adapter/outbound/persistence-mongo/src/##&#x27; </tspan></text>
<text x="24" y="244" fill="#8b949e" font-size="13" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">cwd: /shared/codebase/clean-architecture-backend-template</tspan></text>
<text x="24" y="266" fill="#8b949e" font-size="13" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">time: 2026-09-02T06:55:29+00:00 · exit 0</tspan></text>
<line x1="24" y1="280" x2="1176" y2="280" stroke="#30363d"/>
<text x="24" y="320" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"># 컴팩트 생성자가 네 입력을 세 방식으로 처리한다</tspan></text>
<text x="24" y="342" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> public MongoPlatformSettings {</tspan></text>
<text x="24" y="364" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> // Absent rather than empty is the normal case: a deployment that has opted the module in but</tspan></text>
<text x="24" y="386" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> // configured no platform profile yet must still start, so binding treats &quot;no profiles&quot; as an</tspan></text>
<text x="24" y="408" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> // empty map instead of a binding failure.</tspan></text>
<text x="24" y="430" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> profiles = profiles == null ? Map.of() : Map.copyOf(profiles);</tspan></text>
<text x="24" y="452" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> // Experimental, and therefore not a switch (MNG-INT-003). The driver-side source — watch,</tspan></text>
<text x="24" y="474" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> // resumeAfter/startAfter, cursor lifetime, reconnection — is not shipped; what exists is policy</tspan></text>
<text x="24" y="496" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> // and value objects that do not add up to a running consumer. Accepting the flag and ignoring</tspan></text>
<text x="24" y="518" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> // it</tspan></text>
<text x="24" y="540" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> // would leave an operator believing it took effect, so the value is refused rather than stored:</tspan></text>
<text x="24" y="562" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> // zero beans, zero threads, and a `true` that cannot be honoured never becomes one that looks</tspan></text>
<text x="24" y="584" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> // honoured.</tspan></text>
<text x="24" y="606" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> changeStreams = false;</tspan></text>
<text x="24" y="628" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> // Absent means the platform default, and a negative count is refused rather than clamped: a</tspan></text>
<text x="24" y="650" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> // requirement of -1 is not a lenient requirement, it is a typo, and reading it as &quot;no</tspan></text>
<text x="24" y="672" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> // secondaries needed&quot; is how a health view comes to report a cluster it never checked.</tspan></text>
<text x="24" y="694" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> if (requiredSecondaries == null) {</tspan></text>
<text x="24" y="716" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> requiredSecondaries = DEFAULT_REQUIRED_SECONDARIES;</tspan></text>
<text x="24" y="738" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> }</tspan></text>
<text x="24" y="760" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> if (requiredSecondaries &lt; 0) {</tspan></text>
<text x="24" y="782" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> throw MongoOperationRejectedException.of(</tspan></text>
<text x="24" y="804" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> &quot;config.secondaries&quot;,</tspan></text>
<text x="24" y="826" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> &quot;the required secondary count must not be negative; &quot; + requiredSecondaries + &quot; is&quot;);</tspan></text>
<text x="24" y="848" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> }</tspan></text>
<text x="24" y="870" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"></tspan></text>
<text x="24" y="892" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"># 시작 검증기의 변경 스트림 분기</tspan></text>
<text x="24" y="914" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">104: if (changeStreamsEnabled &amp;&amp; !capabilities.isStable(MongoCapability.CHANGE_STREAM)) {</tspan></text>
<text x="24" y="936" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">105- throw MongoOperationRejectedException.of(</tspan></text>
<text x="24" y="958" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">106- &quot;startup.capability&quot;,</tspan></text>
<text x="24" y="980" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"></tspan></text>
<text x="24" y="1002" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"># 그 분기가 내는 문장이 저장소에 나오는 곳 전수</tspan></text>
<text x="24" y="1024" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">…/autoconfigure/MongoStartupValidator.java:107: &quot;change streams are enabled but unavailable here: &quot;</tspan></text>
<text x="24" y="1046" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"></tspan></text>
<text x="24" y="1068" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"># changeStreams 라는 이름이 나오는 곳 전수 (다른 타입의 동명 정적 팩터리 포함)</tspan></text>
<text x="24" y="1090" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">test/java/dev/caskeleton/adapter/outbound/mongo/autoconfigure/MongoStartupValidationTest.java:63: assertThat(MongoPlatformSet</tspan><tspan x="24" dy="22">tings.empty().changeStreams())</tspan></text>
<text x="24" y="1134" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">test/java/dev/caskeleton/adapter/outbound/mongo/autoconfigure/MongoStartupValidationTest.java:76: assertThat(asked.changeStre</tspan><tspan x="24" dy="22">ams())</tspan></text>
<text x="24" y="1178" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">test/java/dev/caskeleton/adapter/outbound/mongo/api/profile/MongoRuntimeProfileTest.java:66: assertThatThrownBy(() -&gt; standal</tspan><tspan x="24" dy="22">one.require(MongoTopologyRequirement.changeStreams()))</tspan></text>
<text x="24" y="1222" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">main/java/dev/caskeleton/adapter/outbound/mongo/autoconfigure/MongoPlatformAutoConfiguration.java:363: properties.c</tspan><tspan x="24" dy="22">hangeStreams(),</tspan></text>
<text x="24" y="1266" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"></tspan></text>
<text x="24" y="1288" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"># MongoStartupValidator 를 만드는 곳 전수</tspan></text>
<text x="24" y="1310" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">test/java/dev/caskeleton/adapter/outbound/mongo/autoconfigure/MongoStartupValidatorTest.java:143: return new MongoStartupVali</tspan><tspan x="24" dy="22">dator(</tspan></text>
<text x="24" y="1354" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">main/java/dev/caskeleton/adapter/outbound/mongo/autoconfigure/MongoPlatformAutoConfiguration.java:354: new MongoStartupVali</tspan><tspan x="24" dy="22">dator(</tspan></text>
</svg>