Files
ScadaBridge/src/ScadaLink.Host/ScadaLink.Host.csproj
T
Joseph Doherty 9bf1497f03 feat(host): register Audit Log #23 singletons with dedicated dispatcher (#23)
Wires Bundle E of the M2 site-sync pipeline:

- AddAuditLog extended to register the site writer chain (SqliteAuditWriter
  singleton + ISiteAuditQueue forward + RingBufferFallback + FallbackAuditWriter
  composing them) and the telemetry collaborators (SiteAuditTelemetryOptions,
  SqliteAuditWriterOptions, IAuditWriteFailureCounter NoOp default,
  ISiteStreamAuditClient NoOp default).
- AkkaHostedService central role: AuditLogIngestActor as ClusterSingletonManager
  (singleton name 'audit-log-ingest') + ClusterSingletonProxy, mirroring the
  Notification Outbox pattern. Proxy is offered to SiteStreamGrpcServer if it
  resolves (Site path only today; M6 reconciliation will host gRPC on central).
- AkkaHostedService site role: SiteAuditTelemetryActor (per-site, NOT a
  singleton because each site is its own cluster), bound to a dedicated
  audit-telemetry-dispatcher (ForkJoinDispatcher, 2 dedicated threads).
- Program.cs + SiteServiceRegistration.Configure call AddAuditLog on both roles.
- AuditLogIngestActor gains a second constructor that takes IServiceProvider so
  the cluster singleton can create a fresh scope per message — IAuditLogRepository
  is a scoped EF Core service and cannot be pre-resolved from the root. The
  IAuditLogRepository constructor remains for Bundle D's MSSQL-fixture tests.

NoOp ISiteStreamAuditClient is deliberate: no site→central gRPC channel exists
in M2 (sites talk to central via Akka ClusterClient; gRPC SiteStreamService is
hosted on sites for central→site streaming). M6 reconciliation introduces the
real gRPC site→central client + central-hosted gRPC server. Bundle H's
integration test substitutes a stub client directly via the actor's Props.

Tests:
- tests/ScadaLink.AuditLog.Tests/AddAuditLogTests.cs — 11 tests (was 3): writer
  singleton, IAuditWriter as FallbackAuditWriter, ISiteAuditQueue same-instance
  as SqliteAuditWriter, options bind round-trip, NoOp default assertions.
- tests/ScadaLink.Host.Tests/AkkaHostedServiceAuditWiringTests.cs (new) — 13
  tests: BuildHocon emits audit-telemetry-dispatcher block with the expected
  type/throughput/thread-count; Central composition root resolves the writer
  chain + options; Site composition root resolves the writer chain + options +
  NoOp client.

Verified: dotnet build clean, 23 test suites green (Host 194 + AuditLog 54).
2026-05-20 13:04:05 -04:00

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XML

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<PropertyGroup>
<TargetFramework>net10.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
<TreatWarningsAsErrors>true</TreatWarningsAsErrors>
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<PackageReference Include="Akka.Cluster.Tools" />
<PackageReference Include="Akka.Hosting" />
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<!-- Transitive override: Akka.Hosting 1.5.62 pins OpenTelemetry.Api 1.9.0 which is flagged
(GHSA-g94r-2vxg-569j, GHSA-8785-wc3w-h8q6). Bumping directly clears both advisories. -->
<PackageReference Include="OpenTelemetry.Api" />
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