@

R4: Worker von WorkerEngine auf IHostedService (Generic Host)

- WorkerBase implementiert IHostedService (StartAsync/StopAsync mit CancellationToken,
  eigener CTS, Guard auf Info.Active); IWorker auf Metadaten + TriggerAsync reduziert
- Worker via AddHostedService registriert (Core + Modul); AppHost.Start() startet sie,
  AppHost.StopAsync() stoppt sie
- WorkerEngine auf leichte Registry reduziert (WorkerInfos fuer UI + TriggerWorkerAsync)
- LauncherForm startet/stoppt keine Worker mehr (Host-getrieben)
- Hosting.Abstractions im Core; Tests angepasst -> 43/43 gruen; smoke-ui + App-Start ok

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
@

src/IBKRTrader.Core/Workers/WorkerEngine.cs

@@ -5,92 +5,31 @@ using IBKRTrader.Core.Logging;
 namespace IBKRTrader.Core.Workers;
 
 /// <summary>
-/// Orchestriert alle registrierten IWorker.
-/// – Startet/stoppt Worker
-/// – Stellt BindingList für DataGridView bereit
-/// – Thread-sicher via ConcurrentDictionary
+/// Leichtgewichtige Registry über alle Worker/Services. Start/Stop übernimmt der Generic Host
+/// (jeder Worker ist ein <see cref="Microsoft.Extensions.Hosting.IHostedService"/>). Diese Klasse
+/// stellt die live-bindbare Liste für die Workers-Ansicht bereit und erlaubt den manuellen Trigger.
 /// </summary>
 public class WorkerEngine
 {
-    private readonly IEnumerable<IWorker>                   _workers;
-    private readonly LoggingService                         _logger;
-    private readonly ConcurrentDictionary<string, IWorker>  _registry = new();
-    private CancellationTokenSource                         _cts      = new();
+    private readonly ConcurrentDictionary<string, IWorker> _registry = new();
 
-    /// <summary>Live-bindbare Liste für dgv_workerlist.</summary>
+    /// <summary>Live-bindbare Liste für die Workers-Ansicht (DataGridView).</summary>
     public BindingList<WorkerInfo> WorkerInfos { get; } = [];
 
     public WorkerEngine(IEnumerable<IWorker> workers, LoggingService logger)
     {
-        _workers = workers;
-        _logger  = logger;
-    }
-
-    // ─── Engine-Lifecycle ─────────────────────────────────────────────────────
-
-    public async Task StartAllAsync()
-    {
-        _cts = new CancellationTokenSource();
-
-        foreach (var worker in _workers)
+        foreach (var worker in workers)
         {
-            RegisterWorker(worker);
-
-            if (worker.Info.Active)
-                await worker.StartAsync(_cts.Token);
+            _registry[worker.Name] = worker;
+            WorkerInfos.Add(worker.Info);
         }
-
-        _logger.Info("Core", $"WorkerEngine gestartet – {_registry.Count} Worker/Services registriert.");
-    }
-
-    public async Task StopAllAsync()
-    {
-        await _cts.CancelAsync();
-
-        var tasks = _registry.Values.Select(w => w.StopAsync());
-        await Task.WhenAll(tasks);
-
-        _logger.Info("Core", "WorkerEngine gestoppt.");
-    }
-
-    // ─── Einzelsteuerung ──────────────────────────────────────────────────────
-
-    public async Task StartWorkerAsync(string name)
-    {
-        if (!_registry.TryGetValue(name, out var worker)) return;
-        worker.Info.Active = true;
-        await worker.StartAsync(_cts.Token);
-        _logger.Info("Core", $"Worker manuell gestartet: {name}");
-    }
-
-    public async Task StopWorkerAsync(string name)
-    {
-        if (!_registry.TryGetValue(name, out var worker)) return;
-        worker.Info.Active = false;
-        await worker.StopAsync();
-        _logger.Info("Core", $"Worker manuell gestoppt: {name}");
+        logger.Info("Core", $"WorkerEngine: {_registry.Count} Worker/Services registriert.");
     }
 
+    /// <summary>Löst einen sofortigen manuellen Run des benannten Workers aus.</summary>
     public async Task TriggerWorkerAsync(string name)
     {
-        if (!_registry.TryGetValue(name, out var worker)) return;
-        await worker.TriggerAsync();
-        _logger.Info("Core", $"Worker manuell ausgelöst: {name}");
-    }
-
-    // ─── Intern ───────────────────────────────────────────────────────────────
-
-    private void RegisterWorker(IWorker worker)
-    {
-        _registry[worker.Name] = worker;
-
-        // WorkerInfo in BindingList eintragen (UI-Thread, falls nötig)
-        if (WorkerInfos is { } list)
-        {
-            if (SynchronizationContext.Current != null)
-                list.Add(worker.Info);
-            else
-                list.Add(worker.Info);
-        }
+        if (_registry.TryGetValue(name, out var worker))
+            await worker.TriggerAsync();
     }
 }