VirtualTagActor and ScriptedAlarmActor now route through pluggable
evaluator interfaces and fan out to the cluster's live-tail topics
shipped in F15.3:
- IVirtualTagEvaluator + NullVirtualTagEvaluator in Commons.Engines.
VirtualTagActor calls evaluator on every DependencyValueChanged,
dedupes unchanged values, forwards EvaluationResult to its parent,
and publishes ScriptLogEntry Warning to the script-logs DPS topic
whenever the evaluator fails.
- IScriptedAlarmEvaluator + NullScriptedAlarmEvaluator. ScriptedAlarmActor
takes an AlarmConfig (id/name/equipment-path/severity/predicate) and
publishes both an AlarmTransitionEvent (alerts topic) and a
ScriptLogEntry (script-logs topic) at every transition. Manual
ConditionMet/Acknowledge/Cleared still flow through the same
Transition() so callers without engine bindings still drive the
state machine; the legacy single-string Props() overload routes
through a default AlarmConfig.
The Null* defaults keep the actors safe when no engine is bound —
unconfigured nodes never spuriously alarm. Production binding to
Core.VirtualTags.VirtualTagEngine and Core.ScriptedAlarms is the
remaining residual (F8b/F9b — split in tasks JSON).
Tests: Runtime 34 -> 40 (+6):
- VirtualTagActorTests x3 (evaluator drives EvaluationResult,
unchanged-value dedup, failure publishes Warning ScriptLogEntry)
- ScriptedAlarmActorTests x3 (engine threshold drives Activated +
Cleared on alerts topic, manual Acknowledge attribution).
All 6 v2 test suites green: 126 tests passing.
DriverHostActor.ApplyAndAck now reads the deployment artifact and
reconciles its set of DriverInstanceActor children — spawn the missing,
ApplyDelta to those with changed config, stop the removed/disabled.
The diff lives in pure DriverSpawnPlanner so it can be unit-tested
without an ActorSystem.
Adds IDriverFactory in Core.Abstractions (consumed by Runtime) +
DriverFactoryRegistryAdapter in Core.Hosting that wraps the existing
v1 DriverFactoryRegistry — Runtime stays decoupled from Polly/Serilog,
the Host wires the adapter once driver assemblies have registered.
ShouldStub(type, roles) is now actually called on every spawn — Galaxy
+ Wonderware-Historian boot stubbed on macOS/Linux or whenever the host
carries the dev role. Missing factory ⇒ stub fallback, never a crash.
Tests: 24 → 34 in Runtime (+10):
- DriverSpawnPlannerTests x7 (diff cases, type change ⇒ stop+respawn)
- DeploymentArtifactTests x5 (empty/malformed/missing fields tolerant)
- DriverHostActorReconcileTests x4 (spawn count, stub fallback,
ShouldStub gate, second-apply stops the removed)
All 6 v2 test suites green: 120 tests passing.
Closes F20 (ShouldStub wired). F7 marked partial — subscription
publishing + write path still stubbed in DriverInstanceActor itself.
Replaces the Ok=true stub with a TCP connect to the peer's OPC UA port (4840
default) with a 2s timeout. A successful connect indicates the OPC UA server
process is up + accepting connections — enough for the redundancy calculator
to treat the peer as live. A full secure-channel Hello/Acknowledge handshake
is overkill for what the redundancy calc consumes and would pull in the OPC
UA Client SDK + a PKI setup. Upgrade later if a deeper liveness signal is ever
required.
Probe extracts the host from NodeId by stripping the :port suffix (commit
5cfbe8b encoded host:port into NodeId for cluster-member identity).
Tests: 2 new tests — Ok=true against a live TcpListener on a chosen port,
Ok=false against an unreachable endpoint. All 17 Runtime tests pass (was 16
covering only the message-contract surface).
The original Task 14 (5-min EF migration that "drops ConfigGeneration") was
under-scoped: the design doc (live-edit model, ~line 208) requires removing
GenerationId from 13 entities (Equipment, DriverInstance, Device, Tag,
PollGroup, Namespace, UnsArea, UnsLine, NodeAcl, Script, VirtualTag,
ScriptedAlarm) and adding RowVersion columns for last-write-wins detection.
That cascades into GenerationApplier / GenerationDiff / GenerationSealedCache
and the legacy Server/Admin CRUD services.
New decomposition (~85 min total, replacing the original 5-min estimate):
14a standard 10m Add RowVersion to live-edit entities
14b high-risk 30m Drop GenerationId FK from those entities
14c high-risk 20m Obsolete GenerationApplier/Diff/SealedCache
14d standard 5m Drop ClusterNode.RedundancyRole
14e small 5m Delete ConfigGeneration + ClusterNodeGenerationState
14f high-risk 15m Consolidator: generate V2HostingAlignment migration
Policy decision (recorded with user): OtOpcUa.Server + OtOpcUa.Admin are
allowed to fail-to-compile between 14b and Task 56 - only the new v2 projects
need to stay green. Task 56 deletes the legacy projects.
Plan markdown: replaces the original Task 14 section with the 6-task
decomposition + a header explaining the rewrite. Task index table at the
bottom of the plan updated.
Tasks JSON: replaces the single Task 14 row with 6 string-id rows
("14a", "14b", ..., "14f"). Task 15 (Migrate-To-V2.ps1) and downstream
consumers re-pointed at "14f".
Verification step in 14f rewritten to use the shared docker host at
10.100.0.35 per CLAUDE.md (Docker is not installed on this Mac dev VM).
