The tests probe a free port (bind 0, release) and start the SDK server later; under a
highly parallel run another test can take the port in between and the SDK fails with
'Failed to establish tcp listener sockets for Ipv4 and IPv6.'. OpcUaHostStart.StartAsync
builds a fresh host + server on a fresh port per attempt (up to 5) when the failure is a
bind failure; all 45 start sites in OpcUaServer.Tests, OpcUaServer.IntegrationTests and
Runtime.Tests use it. Per-attempt GUID ApplicationUris are hoisted out of the host factory
because a changed URI against a reused PKI store fails with 'Cannot access private key'.
Claude-Session: https://claude.ai/code/session_01Ef2ozxS7QPanGT8uoATbTe
Adds <summary>, <param>, <typeparam>, and <inheritdoc/> tags to public
members surfaced by commentchecker — resolves 5,847 of 5,869 issues
(99.6%) across three /fixdocs passes.
SdkServiceLevelPublisher writes Server.ServiceLevel through the SDK's
ServerObjectState — the standard OPC UA non-transparent-redundancy signal
clients use to pick a primary. Writes are guarded by DiagnosticsLock so
concurrent SDK diagnostics scans don't fight with our updates.
DeferredServiceLevelPublisher mirrors the DeferredAddressSpaceSink late-
binding pattern: Akka actors resolve IServiceLevelPublisher at construction,
hosted service swaps the SDK publisher in after StandardServer.Start. Host
Program.cs registers DeferredServiceLevelPublisher as the singleton bound
to IServiceLevelPublisher; OtOpcUaServerHostedService gets it injected and
fills it once IServerInternal is available.
Tests boot a real StandardServer on a free port (cross-platform), call
Publish, then verify ServerObject.ServiceLevel.Value reflects the write.
5 new tests; OpcUaServer suite now 45/45 green (was 40, +5).
Closes#81 residual. Unblocks Task 60 (OPC UA dual-endpoint + ServiceLevel
tests).
Joseph Doherty