How should I implement an MVC Bootstrapper for Unity and AutoMapper?
What is the best way to create a bootstrapper for my MVC 2 app? I'm using Unity and AutoMapper and want to abstract the loading and configuration of them as much as possible.
A decent example is here (http://weblogs.asp.net/rashid/archive/2009/02/17/use-bootstrapper-in-your-asp-net-mvc-application-and-reduce-code-smell.aspx ), but UnityContainer implements IDisposable and in that example it is never cleaned up. This (Configuring Automapper in Bootstrapper violates Open-Closed Principle?) is also a decent example, but he doesn't deal with the Unity/Disposable problem either.
Here's (http://www.dominicpettifer.co.uk/Blog/42/put-an-ioc-powered-bootstrapper-in-your-asp-net-mvc-application) another great example of how to do a Bootstrapper, but again doesn't address the Unity/Disposable issue.
I thought about keeping my Bootstrapper object around in a static variable and make it implement IDisposable, but that doesn't sound right.
If you keep a reference to the container in the Bootstrapper class you can dispose it on application end.
public static class Bootstrapper
{
private static IUnityContainer _container;
public static void Run()
{
_container = new UnityContainer();
// Configure container here...
}
public static void Dispose()
{
_container.Dispose();
}
}
public class YourHttpApplication : HttpApplication
{
protected void Application_Start()
{
Bootstrapper.Run();
}
protected void Application_End()
{
Bootstrapper.Dispose();
}
}
Or you could return the container from your bootstrapper, keep a reference to it and dispose it on application end.
public class YourHttpApplication : HttpApplication
{
private IUnityContainer _container;
protected void Application_Start()
{
_container = Bootstrapper.Run();
}
protected void Application_End()
{
_container.Dispose();
}
}
Depends on your preference I guess. Apart from that, any of the bootstrapping examples listed in the question should be a good pick for bootstrapping your application.
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