Ninject with Fluent NHibernate within the Repository Layer

Due do LinqToSql not being appropriate for Many To Many relationships I am in the process of deciding to move to NHibernate (Fluent NHibernate) unless convinced otherwise...

Project Structure: UI (Mvc2 app with Ninject wiring up all services to controllers, and repositories to services), DomainServiceLayer (all util, helpers, services, domain model etc) and my Repository Layer for persistence. I have a another project call Model which basically exposes the entities, which all projects reference.

Basically I am creating my mappings within the Repository Layer with references to NHIbernate and Fluent NHIibernate, I hope to expose the interfaces to the Domain Service for querying and persisting data. How do I wire up the iSession, where do I wire it up? A开发者_高级运维ny example code, what project should I put it in? Ideally I want to keep this within the Repository Layer... Is it worth learning NHibernate and going through all this?

I recommend looking at the blog posts of Bob. He describes in detail how to use the repository pattern in Ninject using NHibernate. I planned adding an example in the near future to the sample application comming with the MVC exptension as this question comes up again and again.

http://blog.bobcravens.com/2010/06/the-repository-pattern-with-linq-to-fluent-nhibernate-and-mysql/

http://blog.bobcravens.com/2010/07/using-nhibernate-in-asp-net-mvc/

http://blog.bobcravens.com/2010/09/the-repository-pattern-part-2/

Typically I have an NHibernateSessionFactory which is a singleton that has an OpenSession method and I bind ISession typically like this.

Bind<ISession>().ToMethod(context => 
NHibernateSessionFactory.Instance.OpenSession()).InRequestScope();

This method just calls through to ISessionFactory.OpenSession You can put this into a NinjectModule in your repository layer, which your app can load when it creates the Kernel.

I do the configuration in the Application Layer (i.e. the top layer) as the configuration differs between applications. But it can be useful to break out some of the configuration into classes stored in the Repository Layer.

I open and close the session with an HttpModule.