Joseph Doherty
dd2aec3b8b
Adds AVEVA.Historian.Client.StoreForward — a client-side store-and-forward layer over the historian write surface (AddHistoricalValuesAsync / SendEventAsync). Producers enqueue writes; the writer persists them and replays on reconnect so a transient disconnect never drops data. This is the roadmap's recommended pragmatic outbox, NOT a bit-faithful reimplementation of AVEVA's native SF cache (that stays deferred) — pure managed, no RE. - HistorianOutboxEntry / HistorianOutboxEntryKind: buffered-write envelope - IHistorianOutboxStore + InMemoryHistorianOutboxStore (tests) + FileHistorianOutboxStore (crash-durable: atomic temp+move JSON per entry, FIFO by filename sequence that resumes past on-disk max, corrupt-file quarantine). OutboxJson normalizes event object? properties off JsonElement. - IHistorianWriteSink + HistorianClientWriteSink (HistorianClient-backed) - HistorianStoreForwardWriter: enqueue, single-flight FIFO FlushAsync with head-of-line blocking, optional MaxDeliveryAttempts dead-lettering, DropOldest/Reject overflow policy, background drain loop (retry on reconnect), GetStatusAsync snapshot mirroring server SF Pending/Storing/ErrorOccurred. 12 unit tests (no server): durability-across-restart, reconnect-drain, FIFO order/head-of-line, dead-letter, overflow policies, background auto-drain. Full suite 293 green. Roadmap R4.1 marked shipped. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01B6mcaT2PjRFKcogzp9UkfC
26 lines
1.0 KiB
C#
26 lines
1.0 KiB
C#
using AVEVA.Historian.Client.Models;
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namespace AVEVA.Historian.Client.StoreForward;
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/// <summary>
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/// Default <see cref="IHistorianWriteSink"/> that forwards buffered writes through a
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/// <see cref="HistorianClient"/>. Historical values replay via
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/// <see cref="HistorianClient.AddHistoricalValuesAsync"/> and events via
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/// <see cref="HistorianClient.SendEventAsync"/>.
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/// </summary>
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public sealed class HistorianClientWriteSink : IHistorianWriteSink
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{
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private readonly HistorianClient _client;
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public HistorianClientWriteSink(HistorianClient client)
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{
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_client = client ?? throw new ArgumentNullException(nameof(client));
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}
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public Task<bool> SendHistoricalValuesAsync(string tag, IReadOnlyList<HistorianHistoricalValue> values, CancellationToken cancellationToken) =>
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_client.AddHistoricalValuesAsync(tag, values, cancellationToken);
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public Task<bool> SendEventAsync(HistorianEvent historianEvent, CancellationToken cancellationToken) =>
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_client.SendEventAsync(historianEvent, cancellationToken);
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}
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