feat(lmxproxy): add Connected Since and Reconnect Count to status page

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

lmxproxy/src/ZB.MOM.WW.LmxProxy.Host/Domain/IScadaClient.cs

@@ -16,6 +16,12 @@ namespace ZB.MOM.WW.LmxProxy.Host.Domain
         /// <summary>Gets the current connection state.</summary>
         ConnectionState ConnectionState { get; }
 
+        /// <summary>Gets the UTC time when the current connection was established.</summary>
+        DateTime ConnectedSince { get; }
+
+        /// <summary>Gets the number of times the client has reconnected since startup.</summary>
+        int ReconnectCount { get; }
+
         /// <summary>Occurs when the connection state changes.</summary>
         event EventHandler<ConnectionStateChangedEventArgs> ConnectionStateChanged;
 

lmxproxy/src/ZB.MOM.WW.LmxProxy.Host/MxAccess/MxAccessClient.Connection.cs

@@ -97,6 +97,9 @@ namespace ZB.MOM.WW.LmxProxy.Host.MxAccess
             get { lock (_lock) { return _connectedSince; } }
         }
 
+        /// <summary>Gets the number of times the client has reconnected since startup.</summary>
+        public int ReconnectCount => _reconnectCount;
+
         // ── Internal synchronous methods ──────────
 
         private void ConnectInternal()
@@ -278,7 +281,8 @@ namespace ZB.MOM.WW.LmxProxy.Host.MxAccess
             try
             {
                 await ConnectAsync(ct);
-                Log.Information("Reconnected to MxAccess successfully");
+                Interlocked.Increment(ref _reconnectCount);
+                Log.Information("Reconnected to MxAccess successfully (reconnect #{Count})", _reconnectCount);
             }
             catch (OperationCanceledException)
             {

lmxproxy/src/ZB.MOM.WW.LmxProxy.Host/MxAccess/MxAccessClient.cs

@@ -53,6 +53,9 @@ namespace ZB.MOM.WW.LmxProxy.Host.MxAccess
         // Probe state — updated by OnDataChange callback, read by monitor loop
         private DateTime _lastProbeValueTime;
 
+        // Reconnect counter
+        private int _reconnectCount;
+
         // Stored subscriptions for reconnect replay
         private readonly Dictionary<string, Action<string, Vtq>> _storedSubscriptions
             = new Dictionary<string, Action<string, Vtq>>(StringComparer.OrdinalIgnoreCase);

lmxproxy/src/ZB.MOM.WW.LmxProxy.Host/Status/StatusModels.cs

@@ -20,6 +20,8 @@ namespace ZB.MOM.WW.LmxProxy.Host.Status
         public string State { get; set; } = "";
         public string NodeName { get; set; } = "";
         public string GalaxyName { get; set; } = "";
+        public DateTime? ConnectedSince { get; set; }
+        public int ReconnectCount { get; set; }
     }
 
     public class SubscriptionStatus

lmxproxy/src/ZB.MOM.WW.LmxProxy.Host/Status/StatusReportService.cs

@@ -83,7 +83,9 @@ namespace ZB.MOM.WW.LmxProxy.Host.Status
             statusData.Connection = new ConnectionStatus
             {
                 IsConnected = _scadaClient.IsConnected,
-                State = _scadaClient.ConnectionState.ToString()
+                State = _scadaClient.ConnectionState.ToString(),
+                ConnectedSince = _scadaClient.IsConnected ? _scadaClient.ConnectedSince : (DateTime?)null,
+                ReconnectCount = _scadaClient.ReconnectCount
             };
 
             // Subscription stats
@@ -180,6 +182,10 @@ namespace ZB.MOM.WW.LmxProxy.Host.Status
             sb.AppendLine("      <h3>Connection</h3>");
             sb.AppendLine($"      <p><strong>Connected:</strong> {statusData.Connection.IsConnected}</p>");
             sb.AppendLine($"      <p><strong>State:</strong> {statusData.Connection.State}</p>");
+            if (statusData.Connection.ConnectedSince.HasValue)
+                sb.AppendLine($"      <p><strong>Connected Since:</strong> {statusData.Connection.ConnectedSince.Value:yyyy-MM-dd HH:mm:ss} UTC</p>");
+            if (statusData.Connection.ReconnectCount > 0)
+                sb.AppendLine($"      <p><strong>Reconnects:</strong> {statusData.Connection.ReconnectCount}</p>");
             if (!string.IsNullOrEmpty(statusData.Connection.NodeName))
                 sb.AppendLine($"      <p><strong>Node:</strong> {statusData.Connection.NodeName}</p>");
             if (!string.IsNullOrEmpty(statusData.Connection.GalaxyName))

lmxproxy/tests/ZB.MOM.WW.LmxProxy.Host.Tests/Health/HealthCheckServiceTests.cs

@@ -19,6 +19,8 @@ namespace ZB.MOM.WW.LmxProxy.Host.Tests.Health
         {
             public bool IsConnected { get; set; } = true;
             public ConnectionState ConnectionState { get; set; } = ConnectionState.Connected;
+            public DateTime ConnectedSince => DateTime.UtcNow;
+            public int ReconnectCount => 0;
             public event EventHandler<ConnectionStateChangedEventArgs>? ConnectionStateChanged;
             public Task ConnectAsync(CancellationToken ct = default) => Task.CompletedTask;
             public Task DisconnectAsync(CancellationToken ct = default) => Task.CompletedTask;

lmxproxy/tests/ZB.MOM.WW.LmxProxy.Host.Tests/Status/StatusReportServiceTests.cs

@@ -20,6 +20,8 @@ namespace ZB.MOM.WW.LmxProxy.Host.Tests.Status
         {
             public bool IsConnected { get; set; } = true;
             public ConnectionState ConnectionState { get; set; } = ConnectionState.Connected;
+            public DateTime ConnectedSince => DateTime.UtcNow;
+            public int ReconnectCount => 0;
             public event EventHandler<ConnectionStateChangedEventArgs>? ConnectionStateChanged;
             public Task ConnectAsync(CancellationToken ct = default) => Task.CompletedTask;
             public Task DisconnectAsync(CancellationToken ct = default) => Task.CompletedTask;

lmxproxy/tests/ZB.MOM.WW.LmxProxy.Host.Tests/Subscriptions/SubscriptionManagerTests.cs

@@ -17,6 +17,8 @@ namespace ZB.MOM.WW.LmxProxy.Host.Tests.Subscriptions
         {
             public bool IsConnected => true;
             public ConnectionState ConnectionState => ConnectionState.Connected;
+            public DateTime ConnectedSince => DateTime.UtcNow;
+            public int ReconnectCount => 0;
             public event EventHandler<ConnectionStateChangedEventArgs>? ConnectionStateChanged;
             public Task ConnectAsync(CancellationToken ct = default) => Task.CompletedTask;
             public Task DisconnectAsync(CancellationToken ct = default) => Task.CompletedTask;