- Preserve and replay subscription ref counts across address space rebuilds to prevent MXAccess subscription leaks
- Mark read timeouts and write failures as unsuccessful in PerformanceMetrics for accurate health reporting
- Add deferred MxAccess reconnect path when initial connection fails at startup
- Update code review document with verified completions and new findings
- Add covering tests for all fixes
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Tests verify nodes can be added/removed from the OPC UA server at
runtime by mutating FakeGalaxyRepository and triggering a rebuild.
Uses real OPC UA client sessions to browse, subscribe, and observe
changes.
Tests cover:
- Browse initial hierarchy via OPC UA client
- Add object at runtime → new node appears on browse
- Remove object → node disappears from browse
- Subscribe to node, then remove it → publishes Bad quality
- Surviving nodes still browsable after partial rebuild
- Add/remove individual attributes at runtime
Infrastructure:
- OpcUaTestClient helper for programmatic OPC UA client connections
- OpcUaServerFixture updated with GalaxyRepository/MxProxy accessors
- OpcUaService.TriggerRebuild() exposed for test-driven rebuilds
- Namespace index resolved dynamically via session namespace table
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
OpcUaServiceBuilder provides fluent API for constructing OpcUaService
with dependency overrides (IMxProxy, IGalaxyRepository, IMxAccessClient).
WithMxAccessClient skips the STA thread and COM interop entirely.
OpcUaServerFixture wraps the service lifecycle with automatic port
allocation (atomic counter starting at 16000), guaranteed cleanup via
IAsyncLifetime, and factory methods for common test scenarios:
- WithFakes() — FakeMxProxy + FakeGalaxyRepository with standard data
- WithFakeMxAccessClient() — bypasses COM, fastest for most tests
Also adds TestData helper with reusable hierarchy/attributes matching
gr/layout.md, and 5 fixture tests verifying startup, shutdown, port
isolation, and address space building.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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>
