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NzbDrone.Web/Ninject.Web.Mvc/NinjectHttpApplication.cs

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+#region License
+// 
+// Authors: Nate Kohari <nate@enkari.com>, Josh Close <narshe@gmail.com>
+// Copyright (c) 2007-2009, Enkari, Ltd.
+// 
+// Dual-licensed under the Apache License, Version 2.0, and the Microsoft Public License (Ms-PL).
+// See the file LICENSE.txt for details.
+// 
+#endregion
+#region Using Directives
+using System.Web;
+using System.Web.Mvc;
+using System.Web.Routing;
+using Ninject.Infrastructure;
+#endregion
+
+namespace Ninject.Web.Mvc
+{
+	/// <summary>
+	/// Defines an <see cref="HttpApplication"/> that is controlled by a Ninject <see cref="IKernel"/>.
+	/// </summary>
+	public abstract class NinjectHttpApplication : HttpApplication, IHaveKernel
+	{
+		private static IKernel _kernel;
+
+		/// <summary>
+		/// Gets the kernel.
+		/// </summary>
+		public IKernel Kernel
+		{
+			get { return _kernel; }
+		}
+
+		/// <summary>
+		/// Starts the application.
+		/// </summary>
+		public void Application_Start()
+		{
+			lock (this)
+			{
+				_kernel = CreateKernel();
+
+				_kernel.Bind<RouteCollection>().ToConstant(RouteTable.Routes);
+				_kernel.Bind<HttpContext>().ToMethod(ctx => HttpContext.Current).InTransientScope();
+                _kernel.Bind<HttpContextBase>().ToMethod(ctx => new HttpContextWrapper(HttpContext.Current)).InTransientScope();
+				
+				ControllerBuilder.Current.SetControllerFactory(CreateControllerFactory());
+
+				_kernel.Inject(this);
+
+				OnApplicationStarted();
+			}
+		}
+
+		/// <summary>
+		/// Stops the application.
+		/// </summary>
+		public void Application_Stop()
+		{
+			lock (this)
+			{
+				if (_kernel != null)
+				{
+					_kernel.Dispose();
+					_kernel = null;
+				}
+
+				OnApplicationStopped();
+			}
+		}
+
+		/// <summary>
+		/// Creates the kernel that will manage your application.
+		/// </summary>
+		/// <returns>The created kernel.</returns>
+		protected abstract IKernel CreateKernel();
+
+		/// <summary>
+		/// Creates the controller factory that is used to create the controllers.
+		/// </summary>
+		/// <returns>The created controller factory.</returns>
+		protected virtual NinjectControllerFactory CreateControllerFactory()
+		{
+			return new NinjectControllerFactory(Kernel);
+		}
+
+		/// <summary>
+		/// Called when the application is started.
+		/// </summary>
+		protected virtual void OnApplicationStarted() { }
+
+		/// <summary>
+		/// Called when the application is stopped.
+		/// </summary>
+		protected virtual void OnApplicationStopped() { }
+	}
+}