Joseph Doherty 33780eb64c AB CIP PR 7 — ISubscribable via shared PollGroupEngine. AbCipDriver now implements ISubscribable — Subscribe delegates into the PollGroupEngine extracted in PR 1, Unsubscribe releases the subscription, ShutdownAsync disposes the engine cancelling every active subscription. OnDataChange event wired through the engine's on-change callback so external subscribers see the driver as sender. The engine's reader delegate points at the driver's ReadAsync (already handles lazy runtime init + caching via EnsureTagRuntimeAsync) — each poll tick batch-reads every subscribed tag in one IReadable call. 100ms interval floor inherited from PollGroupEngine.DefaultMinInterval matches Modbus convention. Initial-data push on first poll preserved via forceRaise=true. Exception-tolerant loop preserved — individual read failures show up as DataValueSnapshot with non-Good StatusCode via the status-code mapping PR 3 established. 7 new unit tests in AbCipSubscriptionTests covering initial-poll raising per tag, unchanged value raising only once, value change between polls triggering a new event, Unsubscribe halting the loop, 100ms floor keeping a 5ms request from generating extra events against a stable value, ShutdownAsync cancelling active subscriptions, UDT member subscription routing through the synthesised Motor1.Speed full-reference (proving PR 6's fan-out composes correctly with PR 7's subscription path). Total AbCip unit tests now 137/137 passing (+7 from PR 6's 130). Validates that the shared PollGroupEngine from PR 1 works correctly for a second driver, closing the original motivation for the extraction. Full solution builds 0 errors; Modbus + other drivers untouched. ...

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-04-19 17:11:51 -04:00

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