Hi,

I have been experimenting with the new event system in NHibernate 2.0 and I found it very nice. I even wrote a piece on how you can use it: http://www.codinginstinct.com/2008/04/n ... eners.html

There is no documentation for this feature yet (that I could find) so I can't be sure that I use the intended approach but it seems to work pretty well :)

That is nice, I guess there are a lot of new useful features in NHibernate 2.0. Cant the IInterceptor interface handle the same scenarios that the event system is meant for? When should you use the IInterceptor and when should you use the event system?

That is an interesting question. I am not really sure either when interceptors should be used and when the new event system should be used. My guess is that since the event system is global it is easier to use that to catch lifecycle events for large entity groups. I think the interceptor is added on a per entity bases or can you have global interceptors?

Btw, the new statistics system is great: http://www.codinginstinct.com/2008/04/n ... orail.html

torkelo, excellent article. Thanks!

matnick, my feeling is that you'd want to stop using IInterceptor altogether. If I remember correctly, you can only have a single interceptor (or you create a facade interceptor that chains the rest of them together). whereas the event system easily allows multiple events. I'm sure it's not official, but I'm treating the interceptor method as deprecated, in my mind at least.

@benhyrman

But if the new event system is meant to completely replace the interceptor then why has the intercepor stuff been improved as well? Is there any scenario where the interceptor can only be used and vice versa for the event system?