Joseph Doherty 1d6015bc87 FOCAS PR 3 — ITagDiscovery + ISubscribable + IHostConnectivityProbe + IPerCallHostResolver. Completes the FOCAS driver — 7-interface capability set matching AbCip/AbLegacy/TwinCAT (minus IAlarmSource — Fanuc CNC alarms live in a different API surface, tracked as a future-phase concern). ITagDiscovery emits pre-declared tags under a FOCAS root + per-device sub-folder keyed on the canonical focas://host:port string with DeviceName fallback. Writable → Operate, non-writable → ViewOnly. No native FOCAS symbol browsing — CNCs don't expose a tag catalogue the way Logix or TwinCAT do; operators declare addresses explicitly. ISubscribable consumes the shared PollGroupEngine — 5th consumer of the engine after Modbus + AbCip + AbLegacy + TwinCAT-poll-mode. 100ms interval floor inherited. FOCAS has no native notification/subscription protocol (unlike TwinCAT ADS), so polling is the only option — every subscribed tag round-trips through cnc_rdpmcrng / cnc_rdparam / cnc_rdmacro on each tick. IHostConnectivityProbe uses the existing IFocasClient.ProbeAsync which in the real FwlibFocasClient calls cnc_statinfo (cheap handshake returning ODBST with tmmode/aut/run/motion/alarm state). Probe loop runs when Enabled=true, catches OperationCanceledException during shutdown, falls through to Stopped on exceptions, emits Running/Stopped transitions via OnHostStatusChanged with the canonical focas://host:port as the host-name key. Same-state spurious-event guard under per-device lock. IPerCallHostResolver maps tag full-ref to DeviceHostAddress for Phase 6.1 bulkhead/breaker keying per plan decision #144 — unknown refs fall back to first device, no devices → DriverInstanceId. ShutdownAsync now disposes PollGroupEngine + cancels/disposes per-device probe CTS + disposes cached clients. DeviceState gains ProbeLock / HostState / HostStateChangedUtc / ProbeCts matching the shape used by AbCip/AbLegacy/TwinCAT. 9 new unit tests in FocasCapabilityTests — discovery tag emission with correct SecurityClassification, subscription initial poll raises OnDataChange, shutdown cancels subscriptions, GetHostStatuses entry-per-device, probe Running / Stopped transitions, ResolveHost for known / unknown / no-devices paths. FocasScaffoldingTests updated with Probe.Enabled=false where the default factory would otherwise try to load Fwlib32.dll during the probe-loop spinup. Total FOCAS unit tests now 115/115 passing (+9 from PR 2's 106); full solution builds 0 errors; Modbus / AbCip / AbLegacy / TwinCAT / other drivers untouched. FOCAS driver is real-wire-capable end-to-end — read / write / discover / subscribe / probe / host-resolve for Fanuc FS 0i/16i/18i/21i/30i/31i/32i/Series 35i/Power Mate i controllers once deployment drops Fwlib32.dll beside the server. Closes task #120 subtask FOCAS. ...

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

2026-04-19 19:59:37 -04:00

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