Add cross-platform OPC UA client stack: shared library, CLI tool, and Avalonia UI

Implements Client.Shared (IOpcUaClientService with connection lifecycle, failover, browse, read/write, subscriptions, alarms, history, redundancy), Client.CLI (8 CliFx commands mirroring tools/opcuacli-dotnet), and Client.UI (Avalonia desktop app with tree browser, read/write, subscriptions, alarms, and history tabs). All three target .NET 10 and are covered by 249 unit tests. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-30 15:49:42 -04:00
parent 50b85d41bd
commit a2883b82d9
109 changed files with 8571 additions and 0 deletions
--- a/src/ZB.MOM.WW.LmxOpcUa.Client.CLI/Commands/SubscribeCommand.cs
+++ b/src/ZB.MOM.WW.LmxOpcUa.Client.CLI/Commands/SubscribeCommand.cs
@@ -0,0 +1,62 @@
+using CliFx.Attributes;
+using CliFx.Infrastructure;
+using ZB.MOM.WW.LmxOpcUa.Client.CLI.Helpers;
+using ZB.MOM.WW.LmxOpcUa.Client.Shared;
+
+namespace ZB.MOM.WW.LmxOpcUa.Client.CLI.Commands;
+
+[Command("subscribe", Description = "Monitor a node for value changes")]
+public class SubscribeCommand : CommandBase
+{
+    [CommandOption("node", 'n', Description = "Node ID to monitor", IsRequired = true)]
+    public string NodeId { get; init; } = default!;
+
+    [CommandOption("interval", 'i', Description = "Sampling interval in milliseconds")]
+    public int Interval { get; init; } = 1000;
+
+    public SubscribeCommand(IOpcUaClientServiceFactory factory) : base(factory) { }
+
+    public override async ValueTask ExecuteAsync(IConsole console)
+    {
+        ConfigureLogging();
+        IOpcUaClientService? service = null;
+        try
+        {
+            var ct = console.RegisterCancellationHandler();
+            (service, _) = await CreateServiceAndConnectAsync(ct);
+
+            var nodeId = NodeIdParser.ParseRequired(NodeId);
+
+            service.DataChanged += (_, e) =>
+            {
+                console.Output.WriteLine(
+                    $"[{e.Value.SourceTimestamp:O}] {e.NodeId} = {e.Value.Value} ({e.Value.StatusCode})");
+            };
+
+            await service.SubscribeAsync(nodeId, Interval, ct);
+            await console.Output.WriteLineAsync(
+                $"Subscribed to {NodeId} (interval: {Interval}ms). Press Ctrl+C to stop.");
+
+            // Wait until cancellation
+            try
+            {
+                await Task.Delay(Timeout.Infinite, ct);
+            }
+            catch (OperationCanceledException)
+            {
+                // Expected on Ctrl+C
+            }
+
+            await service.UnsubscribeAsync(nodeId, default);
+            await console.Output.WriteLineAsync("Unsubscribed.");
+        }
+        finally
+        {
+            if (service != null)
+            {
+                await service.DisconnectAsync();
+                service.Dispose();
+            }
+        }
+    }
+}