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Joseph Doherty a7576ffb38 Implement LmxOpcUa server — all 6 phases complete

Full OPC UA server on .NET Framework 4.8 (x86) exposing AVEVA System
Platform Galaxy tags via MXAccess. Mirrors Galaxy object hierarchy as
OPC UA address space, translating contained-name browse paths to
tag-name runtime references.

Components implemented:
- Configuration: AppConfiguration with 4 sections, validator
- Domain: ConnectionState, Quality, Vtq, MxDataTypeMapper, error codes
- MxAccess: StaComThread, MxAccessClient (partial classes), MxProxyAdapter
  using strongly-typed ArchestrA.MxAccess COM interop
- Galaxy Repository: SQL queries (hierarchy, attributes, change detection),
  ChangeDetectionService with auto-rebuild on deploy
- OPC UA Server: LmxNodeManager (CustomNodeManager2), LmxOpcUaServer,
  OpcUaServerHost with programmatic config, SecurityPolicy None
- Status Dashboard: HTTP server with HTML/JSON/health endpoints
- Integration: Full 14-step startup, graceful shutdown, component wiring

175 tests (174 unit + 1 integration), all passing.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-03-25 05:55:27 -04:00

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CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Purpose

The goal of this project is to identify and develop SQL queries that extract the Galaxy object hierarchy from the System Platform Galaxy Repository database in order to build a tag structure for an OPC UA server.

Specifically, we need to:

Build the hierarchy of areas and automation objects (using contained names for human-readable browsing)
Translate contained names to tag_names for read/write operations (e.g., TestMachine_001.DelmiaReceiver in the hierarchy becomes DelmiaReceiver_001 when addressing tag values)

See layout.md for details on the hierarchy vs tag name relationship.

Key Files

Documentation

connectioninfo.md — Database connection details and sqlcmd usage
layout.md — Galaxy object hierarchy, contained_name vs tag_name translation, and target OPC UA structure
build_layout_plan.md — Step-by-step plan for extracting hierarchy, attaching attributes, and monitoring for changes
data_type_mapping.md — Galaxy mx_data_type to OPC UA DataType mapping, including array handling (ValueRank, ArrayDimensions)

Queries

queries/hierarchy.sql — Deployed object hierarchy with browse names and parent relationships
queries/attributes.sql — User-defined (dynamic) attributes with data types and array dimensions
queries/attributes_extended.sql — All attributes (system + user-defined) with data types and array dimensions
queries/change_detection.sql — Poll galaxy.time_of_last_deploy to detect deployment changes

Schema Reference

schema.md — Full schema reference for all tables and views in the ZB database
ddl/tables/ — Individual CREATE TABLE definitions
ddl/views/ — Individual view definitions

Working with the Galaxy Repository Database

The Galaxy Repository is the backing SQL Server database for Wonderware/AVEVA System Platform (Galaxy: ZB, localhost, Windows Auth). Key tables used by the queries:

gobject — Object instances, hierarchy (contained_by_gobject_id, area_gobject_id), deployment state (deployed_package_id)
template_definition — Object type categories (category_id distinguishes areas, engines, user-defined objects, etc.)
dynamic_attribute — User-defined attributes on templates, inherited by instances via derived_from_gobject_id chain
attribute_definition — System/primitive attributes
primitive_instance — Links objects to their primitive components and attribute definitions
galaxy — Single-row table with time_of_last_deploy for change detection

Use sqlcmd -S localhost -d ZB -E -Q "..." to run queries. See connectioninfo.md for details.

Conventions

Store all connection parameters in connectioninfo.md, not scattered across scripts.
Keep SQL query examples and extraction notes as Markdown files in this repo.
If scripts are added (Python, PowerShell, etc.), document their usage and dependencies alongside them.

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