improvements to scheduler,

better parallelism on RSS fetch

NzbDrone.Common/Messaging/CommandCompletedEvent.cs

@@ -0,0 +1,12 @@
+namespace NzbDrone.Common.Messaging
+{
+    public class CommandCompletedEvent : IEvent
+    {
+        public ICommand Command { get; private set; }
+
+        public CommandCompletedEvent(ICommand command)
+        {
+            Command = command;
+        }
+    }
+}

NzbDrone.Common/Messaging/CommandFailedEvent.cs

@@ -0,0 +1,16 @@
+using System;
+
+namespace NzbDrone.Common.Messaging
+{
+    public class CommandFailedEvent : IEvent
+    {
+        public ICommand Command { get; private set; }
+        public Exception Exception { get; private set; }
+
+        public CommandFailedEvent(ICommand command, Exception exception)
+        {
+            Command = command;
+            Exception = exception;
+        }
+    }
+}

NzbDrone.Common/Messaging/CommandStartedEvent.cs

@@ -0,0 +1,12 @@
+namespace NzbDrone.Common.Messaging
+{
+    public class CommandExecutedEvent : IEvent
+    {
+        public ICommand Command { get; private set; }
+
+        public CommandExecutedEvent(ICommand command)
+        {
+            Command = command;
+        }
+    }
+}

NzbDrone.Common/Messaging/MessageAggregator.cs

@@ -75,16 +75,23 @@ namespace NzbDrone.Common.Messaging
 
             try
             {
-                handlerContract.GetMethod("Execute").Invoke(handler, new object[] { command });
+                handlerContract.GetMethod("Execute").Invoke(handler, new object[] {command});
+                PublishEvent(new CommandCompletedEvent(command));
             }
             catch (TargetInvocationException e)
             {
+                PublishEvent(new CommandFailedEvent(command, e));
+
                 if (e.InnerException != null)
                 {
                     throw e.InnerException;
                 }
                 throw;
             }
+            finally
+            {
+                PublishEvent(new CommandExecutedEvent(command));
+            }
 
             _logger.Debug("{0} <- {1}", command.GetType().Name, handler.GetType().Name);
         }

NzbDrone.Common/Messaging/TestCommand.cs

@@ -0,0 +1,13 @@
+namespace NzbDrone.Common.Messaging
+{
+    public class TestCommand : ICommand
+    {
+        public TestCommand()
+        {
+            Duration = 4000;
+        }
+
+        public int Duration { get; set; }
+
+    }
+}

NzbDrone.Common/Messaging/TestCommandExecutor.cs

@@ -0,0 +1,12 @@
+using System.Threading;
+
+namespace NzbDrone.Common.Messaging
+{
+    public class TestCommandExecutor : IExecute<TestCommand>
+    {
+        public void Execute(TestCommand message)
+        {
+            Thread.Sleep(message.Duration);
+        }
+    }
+}