scadaproj/ZB.MOM.WW.GalaxyRepository/CLAUDE.md

ZB.MOM.WW.GalaxyRepository

Shared Galaxy object-hierarchy SQL browse + galaxy_repository.v1 gRPC service for the ZB.MOM.WW SCADA family (consumed by HistorianGateway and mxaccessgw). Build/test from this directory: dotnet test.

Index history (migrated from the scadaproj root CLAUDE.md)

Moved verbatim out of the scadaproj root CLAUDE.md on 2026-09-03 so it loads only when needed. This file is now the authoritative place for this history — append new entries here and keep the root index row short.

Narrative

The Galaxy Repository component normalizes the Galaxy object-hierarchy SQL browse + reusable gRPC service that was previously embedded in mxaccessgw. Shared = canonical galaxy_repository.v1 proto (wire-compatible with mxaccessgw's existing contract so OtOpcUa's GalaxyRepositoryClient is unaffected), the SQL browse provider (HierarchySql / AttributesSql validated reverse-engineered queries), in-memory hierarchy cache + snapshot + deploy-poll refresh BackgroundService, GalaxyHierarchyProjector, and AddZbGalaxyRepository / MapZbGalaxyRepository DI extension. Left per-consumer = section path, subtree auth filtering, and any app-specific paging defaults.

The shared library is built and lives in this repo at ZB.MOM.WW.GalaxyRepository/ (.NET 10; single package ZB.MOM.WW.GalaxyRepository; dotnet pack → 1 nupkg @ 0.1.0, published to the Gitea NuGet feed gitea.dohertylan.com/api/packages/dohertj2/nuget). The design doc is at docs/plans/2026-06-23-historian-gateway-design.md (§10, component 1). Consumed by HistorianGateway as a PackageReference from that Gitea feed, pinned at 0.2.0 (originally a cross-repo ProjectReference to this scadaproj tree; switched to the feed package 2026-06-24; bumped 0.1.0 → 0.2.0 2026-06-25). mxaccessgw adoption is a tracked follow-on — once adopted, mxaccessgw's inline Galaxy browse code is replaced by the shared lib (the galaxy_repository.v1 wire contract is already identical, so OtOpcUa and ScadaBridge clients are unaffected). Build/test from ZB.MOM.WW.GalaxyRepository/: dotnet test. Consumer matrix: HistorianGateway (initial); mxaccessgw (follow-on adoption).