Merge IApplicationShutdown and IApplicationLifetime

- Added StopApplication to IApplicationLifetime. This will replace
IApplicationShutdown.RequestShutdown.

src/Microsoft.AspNet.Hosting.Abstractions/IApplicationLifetime.cs

@@ -30,5 +30,10 @@ namespace Microsoft.AspNet.Hosting
         /// </summary>
         /// <returns></returns>
         CancellationToken ApplicationStopped { get; }
+
+        /// <summary>
+        /// Requests termination the current application.
+        /// </summary>
+        void StopApplication();
     }
 }

src/Microsoft.AspNet.Hosting/ApplicationLifetime.cs

@@ -19,20 +19,14 @@ namespace Microsoft.AspNet.Hosting
         /// Triggered when the application host has fully started and is about to wait
         /// for a graceful shutdown.
         /// </summary>
-        public CancellationToken ApplicationStarted
-        {
-            get { return _startedSource.Token; }
-        }
+        public CancellationToken ApplicationStarted => _startedSource.Token;
 
         /// <summary>
         /// Triggered when the application host is performing a graceful shutdown.
         /// Request may still be in flight. Shutdown will block until this event completes.
         /// </summary>
         /// <returns></returns>
-        public CancellationToken ApplicationStopping
-        {
-            get { return _stoppingSource.Token; }
-        }
+        public CancellationToken ApplicationStopping => _stoppingSource.Token;
 
         /// <summary>
         /// Triggered when the application host is performing a graceful shutdown.
@@ -40,9 +34,21 @@ namespace Microsoft.AspNet.Hosting
         /// until this event completes.
         /// </summary>
         /// <returns></returns>
-        public CancellationToken ApplicationStopped
+        public CancellationToken ApplicationStopped => _stoppedSource.Token;
+
+        /// <summary>
+        /// Signals the ApplicationStopping event and blocks until it completes.
+        /// </summary>
+        public void StopApplication()
         {
-            get { return _stoppedSource.Token; }
+            try
+            {
+                _stoppingSource.Cancel(throwOnFirstException: false);
+            }
+            catch (Exception)
+            {
+                // TODO: LOG
+            }
         }
 
         /// <summary>
@@ -60,21 +66,6 @@ namespace Microsoft.AspNet.Hosting
             }
         }
 
-        /// <summary>
-        /// Signals the ApplicationStopping event and blocks until it completes.
-        /// </summary>
-        public void NotifyStopping()
-        {
-            try
-            {
-                _stoppingSource.Cancel(throwOnFirstException: false);
-            }
-            catch (Exception)
-            {
-                // TODO: LOG
-            }
-        }
-
         /// <summary>
         /// Signals the ApplicationStopped event and blocks until it completes.
         /// </summary>

src/Microsoft.AspNet.Hosting/Internal/HostingEngine.cs

@@ -135,7 +135,7 @@ namespace Microsoft.AspNet.Hosting.Internal
 
             return new Application(ApplicationServices, _serverInstance, new Disposable(() =>
             {
-                _applicationLifetime.NotifyStopping();
+                _applicationLifetime.StopApplication();
                 server.Dispose();
                 _applicationLifetime.NotifyStopped();
                 (_applicationServices as IDisposable)?.Dispose();

src/Microsoft.AspNet.Hosting/Program.cs

@@ -54,14 +54,16 @@ namespace Microsoft.AspNet.Hosting
 
                 Console.WriteLine("Application started. Press Ctrl+C to shut down.");
 
-                var appShutdownService = app.Services.GetRequiredService<IApplicationShutdown>();
+                var appLifetime = app.Services.GetRequiredService<IApplicationLifetime>();
+
                 Console.CancelKeyPress += (sender, eventArgs) =>
                 {
-                    appShutdownService.RequestShutdown();
+                    appLifetime.StopApplication();
                     // Don't terminate the process immediately, wait for the Main thread to exit gracefully.
                     eventArgs.Cancel = true;
                 };
-                appShutdownService.ShutdownRequested.WaitHandle.WaitOne();
+
+                appLifetime.ApplicationStopping.WaitHandle.WaitOne();
             }
         }
     }