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dohertj2 d96b513bbc Merge pull request 'Phase 2 PR 11 � HistoryReadEvents IPC (alarm history)' (#10) from phase-2-pr11-history-events into v2
2026-04-18 07:22:33 -04:00
docs
Phase 2 PR 4 — close the 4 open high/medium MXAccess findings from exit-gate-phase-2-final.md. High 1 (ReadAsync subscription-leak on cancel): the one-shot read now wraps subscribe→first-OnDataChange→unsubscribe in try/finally so the per-tag callback is always detached, and if the read installed the underlying MXAccess subscription itself (the prior _addressToHandle key was absent) it tears it down on the way out — no leaked probe item handles when the caller cancels or times out. High 2 (no reconnect loop): MxAccessClient gets a MxAccessClientOptions {AutoReconnect, MonitorInterval=5s, StaleThreshold=60s} + a background MonitorLoopAsync started at first ConnectAsync. The loop wakes every MonitorInterval, checks _lastObservedActivityUtc (bumped by every OnDataChange callback), and if stale probes the proxy with a no-op COM AddItem("$Heartbeat") on the StaPump; if the probe throws or returns false, the loop reconnects-with-replay — Unregister (best-effort), Register, snapshot _addressToHandle.Keys + clear, re-AddItem every previously-active subscription, ConnectionStateChanged events fire for the false→true transition, ReconnectCount bumps. Medium 3 (subscriptions don't push frames back to Proxy): IGalaxyBackend gains OnDataChange/OnAlarmEvent/OnHostStatusChanged events; new IFrameHandler.AttachConnection(FrameWriter) is called per-connection by PipeServer after Hello + the returned IDisposable disposes at connection close; GalaxyFrameHandler.ConnectionSink subscribes the events for the connection lifetime, fire-and-forget pushes them as MessageKind.OnDataChangeNotification / AlarmEvent / RuntimeStatusChange frames through the writer, swallows ObjectDisposedException for the dispose race, and unsubscribes in Dispose to prevent leaked invocation list refs across reconnects. MxAccessGalaxyBackend's existing SubscribeAsync (which previously discarded values via a (_, __) => {} callback) now wires OnTagValueChanged that fans out per-tag value changes to every subscription ID listening (one MXAccess subscription, multi-fan-out — _refToSubs reverse map). UnsubscribeAsync also reverse-walks the map to only call mx.UnsubscribeAsync when the LAST sub for a tag drops. Stub + DbBacked backends declare the events with #pragma warning disable CS0067 because they never raise them but must satisfy the interface (treat-warnings-as-errors would otherwise fail). Medium 4 (WriteValuesAsync doesn't await OnWriteComplete): MxAccessClient.WriteAsync rewritten to return Task<bool> via the v1-style TaskCompletionSource-keyed-by-item-handle pattern in _pendingWrites — adds the TCS before the Write call, awaits it with a configurable timeout (default 5s), removes the TCS in finally, returns true only when OnWriteComplete reported success. MxAccessGalaxyBackend.WriteValuesAsync now reports per-tag Bad_InternalError ("MXAccess runtime reported write failure") when the bool returns false, instead of false-positive Good. PipeServer's IFrameHandler interface adds the AttachConnection(FrameWriter):IDisposable method + a public NoopAttachment nested class (net48 doesn't support default interface methods so the empty-attach is exposed for stub implementations). StubFrameHandler returns IFrameHandler.NoopAttachment.Instance. RunOneConnectionAsync calls AttachConnection after HelloAck and usings the returned disposable so it disposes at the connection scope's finally. ConnectionStateChanged event added on MxAccessClient (caller-facing diagnostics for false→true reconnect transitions). docs/v2/implementation/pr-4-body.md is the Gitea web-UI paste-in for opening PR 4 once pushed; includes 2 new low-priority adversarial findings (probe item-handle leak; replay-loop silently swallows per-subscription failures) flagged as follow-ups not PR 4 blockers. Full solution 460 pass / 7 skip (E2E on admin shell) / 1 pre-existing Phase 0 baseline. No regressions vs PR 2's baseline.
2026-04-18 01:12:09 -04:00
gr
Track Galaxy Platform and AppEngine runtime state via ScanState probes and proactively invalidate descendant variable quality on Stopped transitions so operators can detect a stopped runtime host before downstream clients read stale data and so the bridge delivers a uniform bad-quality signal instead of relying on MxAccess per-tag fan-out
2026-04-13 15:40:44 -04:00
lib
Migrate historian from SQL to aahClientManaged SDK and resolve all OPC UA Part 11 gaps
2026-04-06 16:38:00 -04:00
scripts
Phase 2 Stream D progress — non-destructive deliverables: appsettings → DriverConfig migration script, two-service Windows installer scripts, process-spawn cross-FX parity test, Stream D removal procedure doc with both Option A (rewrite 494 v1 tests) and Option B (archive + new v2 E2E suite) spelled out step-by-step. Cannot one-shot the actual legacy-Host deletion in any unattended session — explained in the procedure doc; the parity-defect debug cycle is intrinsically interactive (each iteration requires inspecting a v1↔v2 diff and deciding if it's a legitimate v2 improvement or a regression, then either widening the assertion or fixing the v2 code), and git rm -r src/ZB.MOM.WW.OtOpcUa.Host is destructive enough to need explicit operator authorization on a real PR review. scripts/migration/Migrate-AppSettings-To-DriverConfig.ps1 takes a v1 appsettings.json and emits the v2 DriverInstance.DriverConfig JSON blob (MxAccess/Database/Historian sections) ready to upsert into the central Configuration DB; null-leaf stripping; -DryRun mode; smoke-tested against the dev appsettings.json and produces the expected three-section ordered-dictionary output. scripts/install/Install-Services.ps1 registers the two v2 services with sc.exe — OtOpcUaGalaxyHost first (net48 x86 EXE with OTOPCUA_GALAXY_PIPE/OTOPCUA_ALLOWED_SID/OTOPCUA_GALAXY_SECRET/OTOPCUA_GALAXY_BACKEND/OTOPCUA_GALAXY_ZB_CONN/OTOPCUA_GALAXY_CLIENT_NAME env vars set via HKLM:\SYSTEM\CurrentControlSet\Services\OtOpcUaGalaxyHost\Environment registry), then OtOpcUa with depend=OtOpcUaGalaxyHost; resolves down-level account names to SID for the IPC ACL; generates a fresh 32-byte base64 shared secret per install if not supplied (kept out of registry — operators record offline for service rebinding scenarios); echoes start commands. scripts/install/Uninstall-Services.ps1 stops + removes both services. tests/ZB.MOM.WW.OtOpcUa.Driver.Galaxy.Proxy.Tests/HostSubprocessParityTests.cs is the production-shape parity test — Proxy (.NET 10) spawns the actual OtOpcUa.Driver.Galaxy.Host.exe (net48 x86) as a subprocess via Process.Start with backend=db env vars, connects via real named pipe, calls Discover, asserts at least one Galaxy gobject comes back. Skipped when running as Administrator (PipeAcl denies admins, same guard as other IPC integration tests), when the Host EXE hasn't been built, or when the ZB SQL endpoint is unreachable. This is the cross-FX integration that the parity suite genuinely needs — the previous IPC tests all ran in-process; this one validates the production deployment topology where Proxy and Host are separate processes communicating only over the named pipe. docs/v2/implementation/stream-d-removal-procedure.md is the next-session playbook: Option A (rewrite 494 v1 tests via a ProxyMxAccessClientAdapter that implements v1's IMxAccessClient by forwarding to GalaxyProxyDriver — Vtq↔DataValueSnapshot, Quality↔StatusCode, OnTagValueChanged↔OnDataChange mapping; 3-5 days, full coverage), Option B (rename OtOpcUa.Tests → OtOpcUa.Tests.v1Archive with [Trait("Category", "v1Archive")] for opt-in CI runs; new OtOpcUa.Driver.Galaxy.E2E test project with 10-20 representative tests via the HostSubprocessParityTests pattern; 1-2 days, accreted coverage); deletion checklist with eight pre-conditions, ten ordered steps, and a rollback path (git revert restores the legacy Host alongside the v2 stack — both topologies remain installable until the downstream consumer cutover). Full solution 964 pass / 1 pre-existing Phase 0 baseline; the 494 v1 IntegrationTests + 6 v1 IntegrationTests-net48 still pass because legacy OtOpcUa.Host stays untouched until an interactive session executes the procedure doc.
2026-04-18 00:38:44 -04:00
src
Phase 2 PR 11 — HistoryReadEvents IPC (alarm history). New Shared.Contracts messages HistoryReadEventsRequest/Response + GalaxyHistoricalEvent DTO (MessageKind 0x66/0x67). IGalaxyBackend gains HistoryReadEventsAsync, Stub/DbBacked return canonical pending error, MxAccessGalaxyBackend delegates to _historian.ReadEventsAsync (ported in PR 5) and maps HistorianEventDto → GalaxyHistoricalEvent — Guid.ToString() for EventId wire shape, DateTime → Unix ms for both EventTime (when the event fired in the process) and ReceivedTime (when the Historian persisted it), DisplayText + Severity pass through. SourceName is string? — null means 'all sources' (passed straight through to HistorianDataSource.ReadEventsAsync which adds the AddEventFilter('Source', Equal, ...) only when non-null). Distinct from the live GalaxyAlarmEvent type because historical rows carry both timestamps and lack StateTransition (Historian logs instantaneous events, not the OPC UA Part 9 alarm lifecycle; translating to OPC UA event lifecycle is the alarm-subsystem's job). Guards: null historian → Historian-disabled error; SDK exception → Success=false with message chained. Tests (3 new): disabled-error when historian null, maps HistorianEventDto with full field set (Id/Source/EventTime/ReceivedTime/DisplayText/Severity=900) to GalaxyHistoricalEvent, null SourceName passes through unchanged (verifies the 'all sources' contract). Galaxy.Host.Tests Unit suite 34 pass / 0 fail. Galaxy.Host builds clean. Branches off phase-2-pr10-history-attime since both extend the MessageKind enum; fast-forwards if PR 10 merges first.
2026-04-18 07:08:16 -04:00
tests
Phase 2 PR 11 — HistoryReadEvents IPC (alarm history). New Shared.Contracts messages HistoryReadEventsRequest/Response + GalaxyHistoricalEvent DTO (MessageKind 0x66/0x67). IGalaxyBackend gains HistoryReadEventsAsync, Stub/DbBacked return canonical pending error, MxAccessGalaxyBackend delegates to _historian.ReadEventsAsync (ported in PR 5) and maps HistorianEventDto → GalaxyHistoricalEvent — Guid.ToString() for EventId wire shape, DateTime → Unix ms for both EventTime (when the event fired in the process) and ReceivedTime (when the Historian persisted it), DisplayText + Severity pass through. SourceName is string? — null means 'all sources' (passed straight through to HistorianDataSource.ReadEventsAsync which adds the AddEventFilter('Source', Equal, ...) only when non-null). Distinct from the live GalaxyAlarmEvent type because historical rows carry both timestamps and lack StateTransition (Historian logs instantaneous events, not the OPC UA Part 9 alarm lifecycle; translating to OPC UA event lifecycle is the alarm-subsystem's job). Guards: null historian → Historian-disabled error; SDK exception → Success=false with message chained. Tests (3 new): disabled-error when historian null, maps HistorianEventDto with full field set (Id/Source/EventTime/ReceivedTime/DisplayText/Severity=900) to GalaxyHistoricalEvent, null SourceName passes through unchanged (verifies the 'all sources' contract). Galaxy.Host.Tests Unit suite 34 pass / 0 fail. Galaxy.Host builds clean. Branches off phase-2-pr10-history-attime since both extend the MessageKind enum; fast-forwards if PR 10 merges first.
2026-04-18 07:08:16 -04:00
.gitignore
Ignore .claude/ so per-developer Claude Code settings, runtime lock files (scheduled_tasks.lock), and background-agent transcripts stop appearing in git status — these are local IDE state, not project artifacts.
2026-04-17 09:19:40 -04:00
CLAUDE.md
Phase 0 — mechanical rename ZB.MOM.WW.LmxOpcUa.* → ZB.MOM.WW.OtOpcUa.*
2026-04-17 13:57:47 -04:00
export-clean-copy.bat
Add clean export script for distributing repo without git history
2026-04-01 03:31:25 -04:00
mxaccess_documentation.md
Implement LmxOpcUa server — all 6 phases complete
2026-03-25 05:55:27 -04:00
README.md
Extract historian into a runtime-loaded plugin so hosts without the Wonderware SDK can run with Historian.Enabled=false
2026-04-12 15:16:07 -04:00
runtimestatus.md
Track Galaxy Platform and AppEngine runtime state via ScanState probes and proactively invalidate descendant variable quality on Stopped transitions so operators can detect a stopped runtime host before downstream clients read stale data and so the bridge delivers a uniform bad-quality signal instead of relying on MxAccess per-tag fan-out
2026-04-13 15:40:44 -04:00
service_info.md
Add Galaxy platform scope filter so multi-node deployments can restrict the OPC UA address space to only objects hosted by the local platform, reducing memory footprint and MXAccess subscription count from the full Galaxy (49 objects / 4206 attributes) down to the local subtree (3 objects / 386 attributes on the dev Galaxy).
2026-04-16 00:39:11 -04:00
session.dat
Implement LmxOpcUa server — all 6 phases complete
2026-03-25 05:55:27 -04:00
StyleGuide.md
Extract historian into a runtime-loaded plugin so hosts without the Wonderware SDK can run with Historian.Enabled=false
2026-04-12 15:16:07 -04:00
ZB.MOM.WW.OtOpcUa.slnx
Phase 2 Stream D Option B — archive v1 surface + new Driver.Galaxy.E2E parity suite. Non-destructive intermediate state: the v1 OtOpcUa.Host + Historian.Aveva + Tests + IntegrationTests projects all still build (494 v1 unit + 6 v1 integration tests still pass when run explicitly), but solution-level dotnet test ZB.MOM.WW.OtOpcUa.slnx now skips them via IsTestProject=false on the test projects + archive-status PropertyGroup comments on the src projects. The destructive deletion is reserved for Phase 2 PR 3 with explicit operator review per CLAUDE.md "only use destructive operations when truly the best approach". tests/ZB.MOM.WW.OtOpcUa.Tests/ renamed via git mv to tests/ZB.MOM.WW.OtOpcUa.Tests.v1Archive/; csproj <AssemblyName> kept as the original ZB.MOM.WW.OtOpcUa.Tests so v1 OtOpcUa.Host's [InternalsVisibleTo("ZB.MOM.WW.OtOpcUa.Tests")] still matches and the project rebuilds clean. tests/ZB.MOM.WW.OtOpcUa.IntegrationTests gets <IsTestProject>false</IsTestProject>. src/ZB.MOM.WW.OtOpcUa.Host + src/ZB.MOM.WW.OtOpcUa.Historian.Aveva get PropertyGroup archive-status comments documenting they're functionally superseded but kept in-build because cascading dependencies (Historian.Aveva → Host; IntegrationTests → Host) make a single-PR deletion high blast-radius. New tests/ZB.MOM.WW.OtOpcUa.Driver.Galaxy.E2E/ project (.NET 10) with ParityFixture that spawns OtOpcUa.Driver.Galaxy.Host.exe (net48 x86) as a Process.Start subprocess with OTOPCUA_GALAXY_BACKEND=db env vars, awaits 2s for the PipeServer to bind, then exposes a connected GalaxyProxyDriver; skips on non-Windows / Administrator shells (PipeAcl denies admins per decision #76) / ZB unreachable / Host EXE not built — each skip carries a SkipReason string the test method reads via Assert.Skip(SkipReason). RecordingAddressSpaceBuilder captures every Folder/Variable/AddProperty registration so parity tests can assert on the same shape v1 LmxNodeManager produced. HierarchyParityTests (3) — Discover returns gobjects with attributes; attribute full references match the tag.attribute Galaxy reference grammar; HistoryExtension flag flows through correctly. StabilityFindingsRegressionTests (4) — one test per 2026-04-13 stability finding from commits c76ab8f and 7310925: phantom probe subscription doesn't corrupt unrelated host status; HostStatusChangedEventArgs structurally carries a specific HostName + OldState + NewState (event signature mathematically prevents the v1 cross-host quality-clear bug); all GalaxyProxyDriver capability methods return Task or Task<T> (sync-over-async would deadlock OPC UA stack thread); AcknowledgeAsync completes before returning (no fire-and-forget background work that could race shutdown). Solution test count: 470 pass / 7 skip (E2E on admin shell) / 1 pre-existing Phase 0 baseline. Run archived suites explicitly: dotnet test tests/ZB.MOM.WW.OtOpcUa.Tests.v1Archive (494 pass) + dotnet test tests/ZB.MOM.WW.OtOpcUa.IntegrationTests (6 pass). docs/v2/V1_ARCHIVE_STATUS.md inventories every archived surface with run-it-explicitly instructions + a 10-step deletion plan for PR 3 + rollback procedure (git revert restores all four projects). docs/v2/implementation/exit-gate-phase-2-final.md supersedes the two partial-exit docs with the per-stream status table (A/B/C/D/E all addressed, D split across PR 2/3 per safety protocol), the test count breakdown, fresh adversarial review of PR 2 deltas (4 new findings: medium IsTestProject=false safety net loss, medium structural-vs-behavioral stability tests, low backend=db default, low Process.Start env inheritance), the 8 carried-forward findings from exit-gate-phase-2.md, the recommended PR order (1 → 2 → 3 → 4). docs/v2/implementation/pr-2-body.md is the Gitea web-UI paste-in for opening PR 2 once pushed.
2026-04-18 00:56:21 -04:00

README.md

LmxOpcUa

OPC UA server and cross-platform client tools for AVEVA System Platform (Wonderware) Galaxy. The server exposes Galaxy tags via MXAccess as an OPC UA address space. The client stack provides a shared library, CLI tool, and Avalonia desktop application for browsing, reading/writing, subscriptions, alarms, and historical data.

Architecture

                                    OPC UA Clients
                              (CLI, Desktop UI, 3rd-party)
                                         |
                                         v
+-----------------+     +------------------+     +-----------------+
| Galaxy Repo DB  |---->|   OPC UA Server  |<--->| MXAccess Client |
|   (SQL Server)  |     | (address space)  |     | (STA + COM)     |
+-----------------+     +------------------+     +-----------------+
                                |                        |
                        +-------+--------+     +---------+---------+
                        | Status Dashboard|     | Historian Runtime |
                        |  (HTTP/JSON)   |     |   (SQL Server)    |
                        +----------------+     +-------------------+

Contained Name vs Tag Name

Browse Path (contained names) Runtime Reference (tag name)
TestMachine_001/DelmiaReceiver/DownloadPath DelmiaReceiver_001.DownloadPath
TestMachine_001/MESReceiver/MoveInBatchID MESReceiver_001.MoveInBatchID

Server

The OPC UA server runs on .NET Framework 4.8 (x86) and bridges the Galaxy runtime to OPC UA clients.

Server Prerequisites

  • .NET Framework 4.8 SDK
  • AVEVA System Platform with ArchestrA Framework installed
  • Galaxy repository database (SQL Server, Windows Auth)
  • MXAccess COM registered (LMXProxy.LMXProxyServer)
  • Wonderware Historian (optional, for historical data access)
  • Windows (required for COM interop and MXAccess)

Build and Run Server

dotnet restore ZB.MOM.WW.LmxOpcUa.slnx
dotnet build src/ZB.MOM.WW.LmxOpcUa.Host
dotnet run --project src/ZB.MOM.WW.LmxOpcUa.Host

The server starts on opc.tcp://localhost:4840/LmxOpcUa with the None security profile by default. Configure Security.Profiles in appsettings.json to enable Basic256Sha256-Sign or Basic256Sha256-SignAndEncrypt for transport security. See Security Guide.

Install as Windows Service

cd src/ZB.MOM.WW.LmxOpcUa.Host/bin/Debug/net48
ZB.MOM.WW.LmxOpcUa.Host.exe install
ZB.MOM.WW.LmxOpcUa.Host.exe start

Service logon requirement: The service must run under a Windows account that has access to the AVEVA Galaxy and Historian. The default LocalSystem account can connect to MXAccess and SQL Server but cannot authenticate with the Historian SDK (HCAP). Configure the service to "Log on as" a domain or local user that is a recognized ArchestrA platform user. This can be set in services.msc or during install with ZB.MOM.WW.LmxOpcUa.Host.exe install -username DOMAIN\user -password ***.

Run Server Tests

dotnet test tests/ZB.MOM.WW.LmxOpcUa.Tests
dotnet test tests/ZB.MOM.WW.LmxOpcUa.IntegrationTests

Client Stack

The client stack is cross-platform (.NET 10) and consists of three projects sharing a common IOpcUaClientService abstraction. No AVEVA software or COM is required — the clients connect to any OPC UA server.

Client Prerequisites

  • .NET 10 SDK
  • No platform-specific dependencies (runs on Windows, macOS, Linux)

Build All Clients

dotnet build src/ZB.MOM.WW.LmxOpcUa.Client.Shared
dotnet build src/ZB.MOM.WW.LmxOpcUa.Client.CLI
dotnet build src/ZB.MOM.WW.LmxOpcUa.Client.UI

Run Client Tests

dotnet test tests/ZB.MOM.WW.LmxOpcUa.Client.Shared.Tests
dotnet test tests/ZB.MOM.WW.LmxOpcUa.Client.CLI.Tests
dotnet test tests/ZB.MOM.WW.LmxOpcUa.Client.UI.Tests

Client CLI

# Connect
dotnet run --project src/ZB.MOM.WW.LmxOpcUa.Client.CLI -- connect -u opc.tcp://localhost:4840/LmxOpcUa

# Browse Galaxy hierarchy
dotnet run --project src/ZB.MOM.WW.LmxOpcUa.Client.CLI -- browse -u opc.tcp://localhost:4840/LmxOpcUa -n "ns=3;s=ZB" -r -d 5

# Read a tag
dotnet run --project src/ZB.MOM.WW.LmxOpcUa.Client.CLI -- read -u opc.tcp://localhost:4840/LmxOpcUa -n "ns=3;s=TestMachine_001.MachineID"

# Write a tag
dotnet run --project src/ZB.MOM.WW.LmxOpcUa.Client.CLI -- write -u opc.tcp://localhost:4840/LmxOpcUa -n "ns=3;s=TestChildObject.TestString" -v "Hello"

# Subscribe to changes
dotnet run --project src/ZB.MOM.WW.LmxOpcUa.Client.CLI -- subscribe -u opc.tcp://localhost:4840/LmxOpcUa -n "ns=3;s=TestChildObject.TestInt" -i 500

# Read historical data
dotnet run --project src/ZB.MOM.WW.LmxOpcUa.Client.CLI -- historyread -u opc.tcp://localhost:4840/LmxOpcUa -n "ns=3;s=TestMachine_001.TestHistoryValue" --start "2026-03-25" --end "2026-03-30"

# Subscribe to alarm events
dotnet run --project src/ZB.MOM.WW.LmxOpcUa.Client.CLI -- alarms -u opc.tcp://localhost:4840/LmxOpcUa -n "ns=3;s=TestMachine_001" --refresh

# Query redundancy state
dotnet run --project src/ZB.MOM.WW.LmxOpcUa.Client.CLI -- redundancy -u opc.tcp://localhost:4840/LmxOpcUa

Client UI

dotnet run --project src/ZB.MOM.WW.LmxOpcUa.Client.UI

The desktop application provides browse tree, subscriptions, alarm monitoring, history reads, and write dialogs. See Client UI Documentation for details.

Project Structure

src/
    ZB.MOM.WW.LmxOpcUa.Host/           OPC UA server (.NET Framework 4.8, x86)
        Configuration/                   Config binding and validation
        Domain/                          Interfaces, DTOs, enums, mappers
        Historian/                       Wonderware Historian data source
        Metrics/                         Performance tracking (rolling P95)
        MxAccess/                        STA thread, COM interop, subscriptions
        GalaxyRepository/                SQL queries, change detection
        OpcUa/                           Server, node manager, address space, alarms, diff
        Status/                          HTTP dashboard, health checks

    ZB.MOM.WW.LmxOpcUa.Client.Shared/   Shared OPC UA client library (.NET 10)
    ZB.MOM.WW.LmxOpcUa.Client.CLI/      Command-line client (.NET 10)
    ZB.MOM.WW.LmxOpcUa.Client.UI/       Avalonia desktop client (.NET 10)

tests/
    ZB.MOM.WW.LmxOpcUa.Tests/           Server unit + integration tests
    ZB.MOM.WW.LmxOpcUa.IntegrationTests/ Server integration tests (live DB)
    ZB.MOM.WW.LmxOpcUa.Client.Shared.Tests/  Shared library tests
    ZB.MOM.WW.LmxOpcUa.Client.CLI.Tests/     CLI command tests
    ZB.MOM.WW.LmxOpcUa.Client.UI.Tests/      UI ViewModel + headless tests

gr/                                      Galaxy repository docs, SQL queries, schema

Documentation

Server

Component Description
OPC UA Server Endpoint, sessions, security policy, server lifecycle
Address Space Hierarchy nodes, variable nodes, primitive grouping, NodeId scheme
Galaxy Repository SQL queries, deployed package chain, change detection
MXAccess Bridge STA thread, COM interop, subscriptions, reconnection
Data Type Mapping Galaxy to OPC UA types, arrays, security classification
Read/Write Operations Value reads, writes, access level enforcement, array element writes
Subscriptions Ref-counted MXAccess subscriptions, data change dispatch
Alarm Tracking AlarmConditionState nodes, InAlarm monitoring, event reporting
Historical Data Access Historian data source, HistoryReadRaw, HistoryReadProcessed
Incremental Sync Diff computation, subtree teardown/rebuild, subscription preservation
Configuration appsettings.json binding, feature flags, validation
Status Dashboard HTTP server, health checks, metrics reporting
Service Hosting TopShelf, startup/shutdown sequence, error handling
Security Transport security profiles, certificate trust, production hardening
Redundancy Non-transparent warm/hot redundancy, ServiceLevel, paired deployment

Client

Component Description
Client CLI Connect, browse, read, write, subscribe, historyread, alarms, redundancy commands
Client UI Avalonia desktop client: browse, subscribe, alarms, history, write values

Reference

License

Internal use only.

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