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 +1,57 @@
+using Akka.Cluster;
+using ZB.MOM.WW.ScadaBridge.Host.Actors;
+using ZB.MOM.WW.ScadaBridge.InboundAPI;
+
+namespace ZB.MOM.WW.ScadaBridge.Host.Health;
+
+/// <summary>
+/// InboundAPI-008 / InboundAPI-022: production implementation of
+/// <see cref="IActiveNodeGate"/> backed by the running Akka.NET cluster.
+///
+/// The inbound API is "Central cluster only (active node)" — a standby central
+/// node must not execute method scripts or <c>Route.To()</c> calls. This gate
+/// mirrors the leadership check in <see cref="ActiveNodeHealthCheck"/> (the
+/// node is the cluster leader, <see cref="MemberStatus.Up"/>), so
+/// <see cref="InboundApiEndpointFilter"/> can return HTTP 503 on a standby.
+///
+/// Registered only in the Central-role branch of <c>Program.cs</c>. The gate
+/// is resolved per request from <c>HttpContext.RequestServices</c>; while the
+/// <c>AkkaHostedService</c> is still warming up (<c>ActorSystem == null</c>)
+/// or the node has not yet reached <see cref="MemberStatus.Up"/>, this
+/// implementation reports <c>IsActiveNode == false</c> — the safe-by-default
+/// answer matching the standby case.
+/// </summary>
+public sealed class ActiveNodeGate : IActiveNodeGate
+{
+    private readonly AkkaHostedService _akkaService;
+
+    /// <summary>Initializes a new <see cref="ActiveNodeGate"/> bound to the given Akka hosted service.</summary>
+    /// <param name="akkaService">The Akka hosted service exposing the cluster's <see cref="Akka.Actor.ActorSystem"/>.</param>
+    public ActiveNodeGate(AkkaHostedService akkaService)
+    {
+        _akkaService = akkaService;
+    }
+
+    /// <summary>
+    /// <c>true</c> only when this node has joined the cluster (<see cref="MemberStatus.Up"/>)
+    /// AND is the current cluster leader; <c>false</c> in every other state
+    /// (actor system not yet started, node still joining, node is a standby).
+    /// </summary>
+    public bool IsActiveNode
+    {
+        get
+        {
+            var system = _akkaService.ActorSystem;
+            if (system == null)
+                return false;
+
+            var cluster = Cluster.Get(system);
+            var self = cluster.SelfMember;
+            if (self.Status != MemberStatus.Up)
+                return false;
+
+            var leader = cluster.State.Leader;
+            return leader != null && leader == self.Address;
+        }
+    }
+}