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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.

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Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Joseph Doherty
2026-04-18 07:08:16 -04:00
parent d13f919112
commit ca025ebe0c
8 changed files with 234 additions and 0 deletions
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2
src/ZB.MOM.WW.OtOpcUa.Driver.Galaxy.Shared/Contracts/Framing.cs
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@@ -54,6 +54,8 @@ public enum MessageKind : byte
HistoryReadProcessedResponse = 0x63,
HistoryReadAtTimeRequest = 0x64,
HistoryReadAtTimeResponse = 0x65,
HistoryReadEventsRequest = 0x66,
HistoryReadEventsResponse = 0x67,
HostConnectivityStatus = 0x70,
RuntimeStatusChange = 0x71,

37
src/ZB.MOM.WW.OtOpcUa.Driver.Galaxy.Shared/Contracts/History.cs
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@@ -71,3 +71,40 @@ public sealed class HistoryReadAtTimeResponse
[Key(1)] public string? Error { get; set; }
[Key(2)] public GalaxyDataValue[] Values { get; set; } = System.Array.Empty<GalaxyDataValue>();
}
/// <summary>
/// Historical events read — OPC UA HistoryReadEvents service and Alarm &amp; Condition
/// history. <c>SourceName</c> null means "all sources". Distinct from the live
/// <see cref="GalaxyAlarmEvent"/> stream because historical rows carry both
/// <c>EventTime</c> (when the event occurred in the process) and <c>ReceivedTime</c>
/// (when the Historian persisted it) and have no StateTransition — the Historian logs
/// the instantaneous event, not the OPC UA alarm lifecycle.
/// </summary>
[MessagePackObject]
public sealed class HistoryReadEventsRequest
{
[Key(0)] public long SessionId { get; set; }
[Key(1)] public string? SourceName { get; set; }
[Key(2)] public long StartUtcUnixMs { get; set; }
[Key(3)] public long EndUtcUnixMs { get; set; }
[Key(4)] public int MaxEvents { get; set; } = 1000;
}
[MessagePackObject]
public sealed class GalaxyHistoricalEvent
{
[Key(0)] public string EventId { get; set; } = string.Empty;
[Key(1)] public string? SourceName { get; set; }
[Key(2)] public long EventTimeUtcUnixMs { get; set; }
[Key(3)] public long ReceivedTimeUtcUnixMs { get; set; }
[Key(4)] public string? DisplayText { get; set; }
[Key(5)] public ushort Severity { get; set; }
}
[MessagePackObject]
public sealed class HistoryReadEventsResponse
{
[Key(0)] public bool Success { get; set; }
[Key(1)] public string? Error { get; set; }
[Key(2)] public GalaxyHistoricalEvent[] Events { get; set; } = System.Array.Empty<GalaxyHistoricalEvent>();
}