2 Commits

Author	SHA1	Message	Date
Joseph Doherty	c0751fdda5	ExternalIdReservation merge inside FinaliseBatchAsync. Closes task #197. The FinaliseBatch docstring called this out as a narrower follow-up pending a concurrent-insert test matrix, and the CSV import UI PR (#163) noted that operators would see raw DbUpdate UNIQUE-constraint messages on ZTag/SAPID collision until this landed. Now every finalised-batch row reserves ZTag + SAPID in the same EF transaction as the Equipment inserts, so either both commit atomically or neither does. New MergeReservation helper handles the four outcomes per (Kind, Value) pair: (1) value empty/whitespace → skip the reservation entirely (operator left the optional identifier blank); (2) active reservation exists for same EquipmentUuid → bump LastPublishedAt + reuse (re-finalising a batch against the same equipment must be idempotent, e.g. a retry after a transient DB blip); (3) active reservation exists for a DIFFERENT EquipmentUuid → throw ExternalIdReservationConflictException with the conflicting UUID + originating cluster + first-published timestamp so operator sees exactly who owns the value + where to resolve it (release via sp_ReleaseExternalIdReservation or pick a new ZTag); (4) no active reservation → create a fresh row with FirstPublishedBy = batch.CreatedBy + FirstPublishedAt = transaction time. Pre-commit overlap scan uses one round-trip (WHERE Kind+Value IN the batch's distinct sets, filtered to ReleasedAt IS NULL so explicitly-released values can be re-issued per decision #124) + caches the results in a Dictionary keyed on (Kind, value.ToLowerInvariant()) for O(1) lookup during the row loop. Race-safety catch: if another finalise commits between our cache-load + our SaveChanges, SQL Server surfaces a 2601/2627 unique-index violation against UX_ExternalIdReservation_KindValue_Active — IsReservationUniquenessViolation walks the inner-exception chain for that specific signature + rethrows as ExternalIdReservationConflictException so the UI shows a clean message instead of a raw DbUpdateException. The index-name match means unrelated filtered-unique violations (future indices) don't get mis-classified. Test-fixture Row() helper updated to generate unique SAPID per row (sap-{ZTag}) — the prior shared SAPID="sap" worked only because reservations didn't exist; two rows sharing a SAPID under different EquipmentUuids now collide as intended by decision #124's fleet-wide uniqueness rule. Four new tests: (a) finalise creates both ZTag + SAPID reservations with expected Kind + Value; (b) re-finalising same EquipmentUuid's ZTag from a different batch does not create a duplicate (LastPublishedAt refresh only); (c) different EquipmentUuid claiming the same ZTag throws ExternalIdReservationConflictException with the ZTag value in the message + Equipment row for the second batch is NOT inserted (transaction rolled back cleanly); (d) row with empty ZTag + empty SAPID skips reservation entirely. Full Admin.Tests suite 85/85 passing (was 81 before this PR, +4). Admin project builds 0 errors. Note: the InMemory EF provider doesn't enforce filtered-unique indices, so the IsReservationUniquenessViolation catch is exercised only in the SQL Server integration path — the in-memory tests cover the cache-level conflict detection in MergeReservation instead, which is the first line of defence + catches the same-batch + published-vs-staged cases. The DbUpdate catch protects only the last-second race where two concurrent transactions both passed the cache check. ... Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>	2026-04-19 23:02:31 -04:00
Joseph Doherty	ad131932d3	Phase 6.4 Stream B.2-B.4 server-side — EquipmentImportBatch staging + FinaliseBatch transaction ... Closes the server-side/data-layer piece of Phase 6.4 Stream B.2-B.4. The CSV-import preview + modal UI (Stream B.3/B.5) still belongs to the Admin UI follow-up — this PR owns the staging tables + atomic finalise alone. Configuration: - New EquipmentImportBatch entity (Id, ClusterId, CreatedBy, CreatedAtUtc, RowsStaged/Accepted/Rejected, FinalisedAtUtc?). Composite index on (CreatedBy, FinalisedAtUtc) powers the Admin preview modal's "my open batches" query. - New EquipmentImportRow entity — one row per CSV row, 8 required columns from decision #117 + 9 optional from decision #139 + IsAccepted flag + RejectReason. FK to EquipmentImportBatch with cascade delete so DropBatch collapses the whole tree. - EF migration 20260419_..._AddEquipmentImportBatch. - SchemaComplianceTests expected tables list gains the two new tables. Admin.Services.EquipmentImportBatchService: - CreateBatchAsync — new header row, caller-supplied ClusterId + CreatedBy. - StageRowsAsync(batchId, acceptedRows, rejectedRows) — bulk-inserts the parsed CSV rows into staging. Rejected rows carry LineNumberInFile + RejectReason for the preview modal. Throws when the batch is finalised. - DropBatchAsync — removes batch + cascaded rows. Throws when the batch was already finalised (rollback via staging is not a time machine). - FinaliseBatchAsync(batchId, generationId, driverInstanceId, unsLineId) — atomic apply. Opens an EF transaction when the provider supports it (SQL Server in prod; InMemory in tests skips the tx), bulk-inserts every accepted staging row into Equipment, stamps EquipmentImportBatch.FinalisedAtUtc, commits. Failure rolls back so Equipment never partially mutates. Idempotent-under-double-call: second finalise throws ImportBatchAlreadyFinalisedException. - ListByUserAsync(createdBy, includeFinalised) — the Admin preview modal's backing query. OrderByDescending on CreatedAtUtc so the most-recent batch shows first. - Two exception types: ImportBatchNotFoundException + ImportBatchAlreadyFinalisedException. ExternalIdReservation merging (ZTag + SAPID fleet-wide uniqueness) is NOT done here — a narrower follow-up wires it once the concurrent-insert test matrix is green. Tests (10 new EquipmentImportBatchServiceTests, all pass): - CreateBatch populates Id + CreatedAtUtc + zero-ed counters. - StageRows accepted + rejected both persist; counters advance. - DropBatch cascades row delete. - DropBatch after finalise throws. - Finalise translates accepted staging rows → Equipment under the target GenerationId + DriverInstanceId + UnsLineId. - Finalise twice throws. - Finalise of unknown batch throws. - Stage after finalise throws. - ListByUserAsync filters by creator + finalised flag. - Drop of unknown batch is a no-op (idempotent rollback). Full solution dotnet test: 1235 passing (was 1225, +10). Pre-existing Client.CLI Subscribe flake unchanged. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>	2026-04-19 14:55:39 -04:00