ReadAsync internally subscribes/unsubscribes the same ScanTime tag used
by the persistent probe, which was tearing down the probe subscription
and triggering false reconnects every ~5s. Guard UnsubscribeInternal and
stored subscription state so the probe tag is never removed by other
callers. Also removes DetailedHealthCheckService (redundant with the
persistent probe), adds per-instance config files (appsettings.v2.json,
appsettings.v2b.json) loaded via LMXPROXY_INSTANCE env var so deploys
no longer overwrite port settings.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
The old probe did a subscribe-read-unsubscribe cycle every 5 seconds to
check connection health. This created unnecessary churn and didn't detect
the failure mode where long-lived subscriptions silently stop receiving
COM callbacks (e.g. stalled STA message pump). The new approach keeps a
persistent subscription on the health check tag and forces reconnect if
no value update arrives within a configurable threshold (ProbeStaleThresholdMs,
default 5s). Also adds STA message pump debug logging (5-min heartbeat with
message counters) and fixes log file path resolution for Windows services.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Table now displays all 5 RPC types (Read, ReadBatch, Write, WriteBatch,
Subscribe) with dashes for zero-count operations instead of hiding the
table entirely.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Subscription metrics (totalDelivered, totalDropped) now visible in
/api/status JSON and HTML dashboard. Card turns yellow if drops > 0.
Aggregated from per-client counters in SubscriptionManager.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
SubscriptionManager.Subscribe was fire-and-forgetting the MxAccess COM
subscription creation. The initial OnDataChange callback could fire
before the subscription was established, losing the first (and possibly
only) value update. Changed to async SubscribeAsync that awaits
CreateMxAccessSubscriptionsAsync before returning the channel reader.
Subscribe_ReceivesUpdates now passes 5/5 consecutive runs.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
With StaComThread's GetMessage loop in place, OnWriteComplete callbacks
are now delivered properly. Write flow: dispatch Write() on STA thread,
await OnWriteComplete via TCS, clean up on STA thread. Falls back to
fire-and-forget on timeout as safety net. OnWriteComplete now resolves
or rejects the TCS with MxStatus error details.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Multiple instances registering with the same name may cause MxAccess to
conflict on callback routing. ClientName is now configurable via
appsettings.json, defaulting to a GUID-suffixed name if not set.
Instances A and B use "LmxProxy-A" and "LmxProxy-B" respectively.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Three fixes for the SubscriptionManager/MxAccessClient subscription pipeline:
1. Serialize Subscribe and UnsubscribeClient with a SemaphoreSlim gate to prevent
race where old-session unsubscribe removes new-session COM subscriptions.
CreateMxAccessSubscriptionsAsync is now awaited instead of fire-and-forget.
2. Fix dual VTQ delivery in MxAccessClient.OnDataChange — each update was delivered
twice (once via stored callback, once via OnTagValueChanged property). Now uses
stored callback as the single delivery path.
3. Store pending tag addresses when CreateMxAccessSubscriptionsAsync fails (MxAccess
down) and retry them on reconnect via NotifyReconnection/RetryPendingSubscriptionsAsync.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Added DatetimeArray message (repeated int64, UTC ticks) to proto and
code-first contracts. Host serializes DateTime[] → DatetimeArray.
Client deserializes DatetimeArray → DateTime[] (not raw long[]).
Client ExtractArrayValue now unpacks all array types including DateTime.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
DateTime[] from MxAccess was falling through to ToString() fallback,
producing "System.DateTime[]" instead of actual values. Now converts
each DateTime to UTC ticks and stores in Int64Array.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
AppEngine built-in tag is always present and constantly updating (~1s),
making it a more reliable probe than a user-deployed TestChildObject tag.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- MxStatusMapper: maps all 40+ MxStatusDetail codes, MxStatusCategory,
and MxStatusSource to human-readable names and client messages
- OnDataChange: checks MXSTATUS_PROXY.success and overrides quality with
specific OPC UA code when MxAccess reports a failure (e.g., CommFailure,
ConfigError, WaitingForInitialData)
- OnWriteComplete: uses MxStatusMapper.FormatStatus for structured logging
- Write errors: catches COMException separately with HRESULT in message
- Read errors: distinguishes COM, timeout, and generic failures in logging
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
SubscriptionManager tracked client-to-tag routing but never called
MxAccessClient.SubscribeAsync to create the actual COM subscriptions,
so OnDataChange never fired. Now creates MxAccess subscriptions for
new tags and disposes them when the last client unsubscribes.
All 17 integration tests pass.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Replaced STA dispatch thread with Task.Run pattern for COM interop
- Fixed TypedValue oneof tracking with property-level _setCase field
- Added x-api-key DelegatingHandler for gRPC metadata authentication
- Fixed CheckApiKey RPC to validate request body key (not header)
- Integration tests: 15/17 pass (reads, subscribes, API keys, connections)
- 2 write tests pending (OnWriteComplete callback timing issue)
- v2 service deployed on windev port 50100
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Split LmxProxy Host and Client into a self-contained solution under lmxproxy/,
ported from the ScadaBridge monorepo with updated namespaces (ZB.MOM.WW.LmxProxy.*).
Client project (.NET 10) inlines Core/DataEngine dependencies and builds clean.
Host project (.NET Fx 4.8) retains ArchestrA.MXAccess for Windows deployment.
Added windev.md documenting the WW_DEV_VM development environment setup.
