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refactor(health.akka): review polish (internal decision helper, role guard, factory results, test coverage) + fix SPEC §4 gate description

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Joseph Doherty
2026-06-01 07:04:29 -04:00
parent edbc79204f
commit 1c2b23cbbb
6 changed files with 39 additions and 13 deletions
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components/health/spec/SPEC.md
+4 -1
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@@ -150,7 +150,10 @@ plug it into `MapHealthChecks` options and also call it from custom endpoints.
`IActiveNodeGate` is a single-property interface (`bool IsActiveNode { get; }`) that expresses
whether the current node should accept write / active-role requests. The default implementation,
`AkkaActiveNodeGate`, delegates to `ActiveNodeHealthCheck`. A `RequireActiveNode()` extension on
`AkkaActiveNodeGate`, reads cluster state **directly**: `IsActiveNode` returns `true` iff the
`ActorSystem` is available, `SelfMember.Status == Up`, and the node is the cluster leader. It is
null-guarded and returns `false` when the `ActorSystem` is not yet ready (safe default during
startup). It does **not** resolve `ActiveNodeHealthCheck` from DI. A `RequireActiveNode()` extension on
`IEndpointConventionBuilder` attaches a policy that short-circuits with `503 Service Unavailable`
on standby nodes.