Niek Otten
7ef63c7ae9
Add the projection persistence and the two services around it:
- Projection.ReadModel: a shared EF Core (Npgsql) read model owning the projection
schema — register_projection + the subscriber's processed_notifications log — plus
EfProjectionStore / EfNotificationLog (atomic record-or-skip on the PK for idempotency)
and the initial migration. One rebuildable store, written by the subscriber and read
by projection-api (ADR-0008).
- EventSubscriber.Api: POST /notifications NRC callback (enforces the abonnement bearer,
401 without it per ADR-0007), POST /admin/rebuild, /health. Migrates on start.
- ProjectionApi.Api: GET /register, GET /register/{id}, /health — the read side.
dotnet-ef pinned as a local tool for migrations; NuGetAuditMode=direct so EF's
design-time-only tooling transitive doesn't flag the shipped build.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
40 lines
1.4 KiB
C#
40 lines
1.4 KiB
C#
using EventSubscriber.Application;
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using Microsoft.EntityFrameworkCore;
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namespace Projection.ReadModel;
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/// <summary>EF Core implementation of the notification log. Idempotency is enforced atomically
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/// by the primary key on <c>key</c>: a duplicate insert raises a unique violation, which is
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/// caught and reported as "already recorded" rather than failing the request.</summary>
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public sealed class EfNotificationLog(ProjectionDbContext db) : INotificationLog
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{
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public async Task<bool> TryRecordAsync(RecordedNotification notification, CancellationToken ct = default)
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{
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db.ProcessedNotifications.Add(new ProcessedNotificationRow
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{
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Key = notification.Key,
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Actie = notification.Actie,
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ZaakId = notification.ZaakId,
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ReceivedAt = DateTimeOffset.UtcNow,
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});
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try
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{
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await db.SaveChangesAsync(ct);
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return true;
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}
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catch (DbUpdateException)
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{
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// Already recorded by an earlier (or concurrent) delivery — drop this duplicate.
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db.ChangeTracker.Clear();
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return false;
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}
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}
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public async Task<IReadOnlyList<RecordedNotification>> AllAsync(CancellationToken ct = default)
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=> await db.ProcessedNotifications
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.OrderBy(r => r.ReceivedAt)
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.Select(r => new RecordedNotification(r.Key, r.Actie, r.ZaakId))
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.ToListAsync(ct);
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}
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