Better names, more info, not using events

NzbDrone.Common/Messaging/Tracking/TrackedCommand.cs

@@ -0,0 +1,29 @@
+using System;
+
+namespace NzbDrone.Common.Messaging.Tracking
+{
+    public class TrackedCommand
+    {
+        public String Type { get; private set; }
+        public ICommand Command { get; private set; }
+        public CommandState State { get; set; }
+        public DateTime StateChangeTime { get; set; }
+        public TimeSpan Runtime { get; set; }
+        public Exception Exception { get; set; }
+        
+        public TrackedCommand(ICommand command, CommandState state)
+        {
+            Type = command.GetType().FullName;
+            Command = command;
+            State = state;
+            StateChangeTime = DateTime.UtcNow;
+        }
+    }
+
+    public enum CommandState
+    {
+        Running = 0,
+        Completed = 1,
+        Failed = 2
+    }
+}