refactor: rename ScadaLink → ZB.MOM.WW.ScadaBridge (code + projects + namespaces)

Solution + 23 src projects + 26 test projects renamed; folders, csproj, namespaces, and ScadaLinkDbContext/ScadaBridgeDbContext class updated. ActorSystem "scadalink" → "scadabridge", Akka seed-node URLs migrated. SQL roles/logins, LDAP domains, CLI command name, and CLI config dir (~/.scadalink → ~/.scadabridge) also renamed. Build green; 5 Host.Tests fail awaiting SQL login rename in next commit. Pre-existing StaleTagMonitor timing flakes unchanged. Rename script committed at tools/rename-to-scadabridge.sh.
2026-05-28 09:37:45 -04:00
parent 6d87ee3c3b
commit 7b0b9c7365
1531 changed files with 11180 additions and 11054 deletions
@@ -0,0 +1,45 @@
+using Akka.Cluster;
+using Microsoft.Extensions.Diagnostics.HealthChecks;
+using ZB.MOM.WW.ScadaBridge.Host.Actors;
+
+namespace ZB.MOM.WW.ScadaBridge.Host.Health;
+
+/// <summary>
+/// Health check that returns healthy only if this node is the active (leader) node
+/// in the Akka.NET cluster. Used by Traefik to route traffic to the active node.
+/// </summary>
+public class ActiveNodeHealthCheck : IHealthCheck
+{
+    private readonly AkkaHostedService _akkaService;
+
+    /// <summary>Initializes a new <see cref="ActiveNodeHealthCheck"/> with the given Akka hosted service.</summary>
+    /// <param name="akkaService">The Akka hosted service providing access to the actor system and cluster state.</param>
+    public ActiveNodeHealthCheck(AkkaHostedService akkaService)
+    {
+        _akkaService = akkaService;
+    }
+
+    /// <summary>Returns healthy if this node is the cluster leader (active node); otherwise returns unhealthy.</summary>
+    /// <param name="context">Health check context providing registration details.</param>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    public Task<HealthCheckResult> CheckHealthAsync(
+        HealthCheckContext context,
+        CancellationToken cancellationToken = default)
+    {
+        var system = _akkaService.ActorSystem;
+        if (system == null)
+            return Task.FromResult(HealthCheckResult.Unhealthy("ActorSystem not yet available."));
+
+        var cluster = Cluster.Get(system);
+        var self = cluster.SelfMember;
+
+        if (self.Status != MemberStatus.Up)
+            return Task.FromResult(HealthCheckResult.Unhealthy($"Node not Up (status: {self.Status})."));
+
+        var leader = cluster.State.Leader;
+        if (leader != null && leader == self.Address)
+            return Task.FromResult(HealthCheckResult.Healthy("Active node (cluster leader)."));
+
+        return Task.FromResult(HealthCheckResult.Unhealthy("Standby node (not cluster leader)."));
+    }
+}