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C#: a commit condition compares the id a record was loaded under with the file's, exactly

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Each stored document carries StoredSchemaId: the id its record sits under in its
store, the one it was loaded under until a write puts it under its type's own id.
Expect, ExpectUnchanged, the reload and merge identity checks compare
(StoredSchemaId, storedAt) with the store's bytes exactly. CanonicalSchemaId is
deleted: canonicalising the disk id let an older version's whole-view rewrite
(same storedAt, restamped to its own id, a member shed) pass a newer cache's
condition (Soul F1), and failed every condition on a record resolved by name or
through a file entry listing the local id (F3). A whole-view write marks every
record it wrote as stored under its type's id, in the store and the cache.

Tests: Soul's rolling-deploy probe as AWholeViewRewriteByAnOlderVersionFails...
(Mismatch for Expect and ExpectUnchanged, nothing derived lands, a pull shows the
rewrite and the retry commits); F3's H1, H1b, H2 pass Expect and ExpectUnchanged
when nothing changed; conditions after a whole-view commit hold for a plain
record and a variant. BareDeck is emitted at run time (EmittedDocumentTypes) so
the shared registry never sees it beside DeclaringDeck; the CanonicalSchemaId
tests and their Claimant fixtures go with the function.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Meta Vens 2026-09-30 12:35:40 +02:00
commit 5c8af219f9
4 changed files with 324 additions and 96 deletions
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4
src/GameCult.Caching.MessagePack/DirectoryMessagePackBackingStore.cs
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@ -109,7 +109,7 @@ public sealed class DirectoryMessagePackBackingStore : CacheBackingStore
.Where(pair => !Staged(pair.Key) &&
(!Entries.TryGetValue(pair.Key, out var existing) ||
existing.StoredAt != pair.Value.StoredAt ||
existing.Descriptor.SchemaId != pair.Value.Descriptor.SchemaId))
existing.StoredSchemaId != pair.Value.StoredSchemaId))
.Select(pair => pair.Value)
.ToArray();
var departed = _hydratedKeys
@ -178,7 +178,7 @@ public sealed class DirectoryMessagePackBackingStore : CacheBackingStore
if (commitLease == null)
return CultCommitOutcome.Contended;
var manifest = ReadManifest();
if (!request.ConditionsHold(manifest.Records, Entries.Values, Registry.CanonicalSchemaId))
if (!request.ConditionsHold(manifest.Records, Entries.Values))
return CultCommitOutcome.Mismatch;
var previousEntries = Entries.ToDictionary(pair => pair.Key, pair => pair.Value, StringComparer.Ordinal);