Does anyone know where to find a good example that uses NHibernate in a web app and a n-tier approach? If the example uses web services to communicate with the UI, even better, though not required... I'm having troubles thinking in a good architectural way to handle my app, wondering if collections inside a class should be lazy, and if so, how to update them when needed...

Thanks a lot!

Alejandro.

Have you seen Cuyahoga? http://www.cuyahoga-project.org

I downloaded it and understood nothing... it's way too big... I guess what I'm looking for is NOT an example after all, but some theory... Or a very small example... I don't even know what I need! Thanks anyway...

Alejandro.

I think most of the "examples" you will find on the web, including Gemini and Cuyahoga will seem a bit complex, but in actuality there are fairly simple, especially older versions of Cuyahoga (like 0.9).

Basically, imho, you will want a Facade that is a Singleton that wraps the ISessionFactory interface. You can see a fine example of this in Cuyahoga. Then you can go the "Facade-wraps-Services" model for implementing business logic that needs access to the NHibernate session, or the "DAO" model for implementing basic CRUD operations. In my app, I use both DAOs and Services since some of my business logic needs to wrap a transaction around changes to many distinct entities.

Web services with NH has seemed to be somewhat of an issue based on the posts I've read. I personally, haven't used Web Services yet, but you will run into a stumbling block in the fact that NH uses proxies for everything lazy loaded. Search this message board for "Web Service" and see what you find.

-devon

An excellent article for asp.net/nhibernate best practises and a small demo app

http://www.codeproject.com/aspnet/NHibe ... ctices.asp