ASP.Net MVC 3 project with Ninject and HierarchicalLifetimeManager? - asp.net-mvc-3

Question

First of all, dependency injection is relatively new to me. I did a first project using Unity.MVC3, and now I would like to switch to Ninject on a new project, since it seems to be the most popular dependency injector for .Net projects. So now, I am trying to use Ninject v2.2.1.4 with Ninject.MVC3 v2.2.2.0 in my project.
In my previous project where I was using Unity, I had something like the following code in my Bootstrapper class:
private static IUnityContainer BuildUnityContainer()
{
var container = new UnityContainer();
container.RegisterType<ITestService, TestService>();
container.RegisterType<IDatabaseFactory, DatabaseFactory>(new HierarchicalLifetimeManager());
container.RegisterType<IUnitOfWork, UnitOfWork>();
container.RegisterType<ILoggingService, LoggingService>();
container.RegisterControllers();
return container;
}
Now, I my new project, I replaced this with something like the following code in the NinjectMVC3 class (App_Start):
private static void RegisterServices(IKernel kernel)
{
kernel.Bind<ITestService>().To<TestService>();
//This does not compile:
//kernel.Bind<IDatabaseFactory>().To<DatabaseFactory>(new HierarchicalLifetimeManager());
kernel.Bind<IDatabaseFactory>().To<DatabaseFactory>();
kernel.Bind<IUnitOfWork>().To<UnitOfWork>();
kernel.Bind<ILoggingService>().To<LoggingService>();
}
However, I don't know what I should do with the DatabaseFactory binding, since it normally requires the use of HierarchicalLifetimeManager. Can anyone tell me how to properly create the binding for DatabaseFactory?

Answer 1

First of all, add these references bu NuGet to be sure that you have a compatible set of packages.
Then, if you add the Ninject.Web.MVC it will setup the project initialization code for you through a power shell script.
And last make a BindModule class like this and add it to module in CreateKernel method that have been created in second step.
public class BindModule : NinjectModule
{
public override void Load()
{
this.Bind<IControllerActivator>().To<CustomControllerActivator>().InRequestScope();
this.Bind<MembaseClient>().ToMethod(context => new MembaseClient()).InSingletonScope();
this.Bind<IUnitOfWork>().To<UnitOfWork>().InRequestScope();
this.Bind<ISessionFactory>().ToMethod(o => MyAutoMapper.sessionFactory).InSingletonScope();
this.Bind<ISession>().ToMethod(o => MyAutoMapper.sessionFactory.OpenSession()).InRequestScope();
}
}
Part of NinjectMVC3 class
public static class NinjectMVC3
{
/// <summary>
/// Creates the kernel that will manage your application.
/// </summary>
/// <returns>The created kernel.</returns>
private static IKernel CreateKernel()
{
var modules = new NinjectModule[] { new BindModule() };
var kernel = new StandardKernel(modules);
RegisterServices(kernel);
return kernel;
}
}
As you can see above Ninjet has built in functions to take care of different life cycles for each object.