Ayende @ Rahien

Jorgas commented on Do you need a framework?

Wed, 02 Sep 2009 08:57:08 GMT

zvolkov, Even though your solution also was interesting it did include a nessecity to use both CastleWindsor and MVCContrib, so I think your way of doing things are a bit more involved and complicated (arguably). However, one point was raised in the comments that at least I think is important. How does one achieve having this behavior, but only actually opening a session when needed? Not in every request? Even though the opening of a session is VERY lightweight, it would be nice to avoid it. Any ideas anyone?

Ayende Rahien commented on Do you need a framework?

Sat, 08 Aug 2009 23:51:03 GMT

Bunter, Take a note that there is a big difference between a few cohesive frameworks and a lot of minor, unrelated, details.

Bunter commented on Do you need a framework?

Sat, 08 Aug 2009 22:50:50 GMT

You will still have to reference NHibernate. And depending on the database, DB libs as well. Having one additional lib with simple framework code for is is just adding ... another reference.

zvolkov commented on Do you need a framework?

Fri, 07 Aug 2009 02:02:16 GMT

I posted complete example here: [zvolkov.com/.../...ASPNET-MVC-with-NHibernate.aspx](http://zvolkov.com/blog/post/2009/08/06/Easiest-way-to-hook-up-ASPNET-MVC-with-NHibernate.aspx)

zvolkov commented on Do you need a framework?

Thu, 06 Aug 2009 19:31:43 GMT

As always Ayende's specific recipe is wrong (don't copy/paste) but the thinking is useful.

Mikael Henriksson commented on Do you need a framework?

Thu, 06 Aug 2009 19:12:46 GMT

Great post great way of tackling unnecessary complexity that doesn't even need to be there!

Dmitry commented on Do you need a framework?

Thu, 06 Aug 2009 14:10:30 GMT

@Rafal, You were probably missing CurrentSessionContext.Bind(Session); CurrentSessionContext.Unbind(SessionFactory); statements. You need the first statement after the session is opened and the second statement after the session is closed. I like to use contextual session because I have a class managing NHibernate sessions in the data access assembly. This approach makes testing easier. However, the new .NET System.Web.Abstractions assembly does let you mock HttpContext; but you would have to use HttpContextBase instead of HttpContext.

Ayende Rahien commented on Do you need a framework?

Thu, 06 Aug 2009 10:01:38 GMT

Nathan, Because this is a single use scenario, it is not generally applicable. And NH does have builtin support for that.

Nathan commented on Do you need a framework?

Thu, 06 Aug 2009 09:35:58 GMT

Why doesn't NHibernate ship this in an assembly? I know when getting started with NHibernate just figuring out how to glue it into your application is little tricky. If its so common you can copy and paste with impunity into every project, I dont see why NHibernate doesn't just give it to us as part of its distribution.

Rafal commented on Do you need a framework?

Thu, 06 Aug 2009 09:24:39 GMT

@Fabio - I've been asking just about this feature (contextual session through GetCurrentSession() ) on NHusers group few days ago but couldn't make it work in my setup. So I'm basically doing it manually, like Ayende.

Ayende Rahien commented on Do you need a framework?

Thu, 06 Aug 2009 08:13:52 GMT

Den, I have a full article about it, which will be publish soon

Tobin Harris commented on Do you need a framework?

Thu, 06 Aug 2009 08:11:27 GMT

@Fabio Yeah, I use the CurrentSessionContext along with an enum, it's quick and simple: UoW.Configure( conStr, UoW.Environment.Test ); [http://gist.github.com/108433](http://gist.github.com/108433)

Tobin Harris commented on Do you need a framework?

Thu, 06 Aug 2009 08:09:21 GMT

I also +1 this approach too. I actually got a bit further and have a code snippet on GitHub: [http://gist.github.com/108433](http://gist.github.com/108433) I swipe this and modify on a per-project basis. I'd rather do that than worry about crafting and maintaining one complex DLL that works for all projects.

Fabio Maulo commented on Do you need a framework?

Thu, 06 Aug 2009 05:36:11 GMT

And not only that Oren. For who what work with session-per-request + test and GetCurrentSessionContext the framework is NHibernate itself... But believe me that it is really hard to explain.

Mike commented on Do you need a framework?

Thu, 06 Aug 2009 05:23:06 GMT

@Ayende I +1 this post and its underlying premise. I abandoned a few 'common' libraries on my current project just because there was too much friction given the speed of development. I also bring in the unit tests for these snippets, if present since they take on a life of their own. You agree with doing this?

Den commented on Do you need a framework?

Thu, 06 Aug 2009 01:47:09 GMT

Oren, what about session management in WindowsForms or WPF application? For example, the main form with grid and the dialog window to edit the current object with collections. If it is a one session conversation, then how to load previous objects states, if the user was modify the data and press Cancel button? If it is a two session process then how to update main form persistent object, if the user was modify the data and pess Ok button? P.S. Thank you for your open source mission.

Ayende Rahien commented on Do you need a framework?

Thu, 06 Aug 2009 00:58:43 GMT

Dmitry, Because it would take me more time to write it up that way than this way, and because I have been doing it this way since before GetCurrentSession().

Dmitry commented on Do you need a framework?

Thu, 06 Aug 2009 00:53:09 GMT

Oren, any reason why you are not using SessionFactory.GetCurrentSession() with current_session_context_class="web" instead of manually setting the HttpContext.Current.Item[""]?

Ayende Rahien commented on Do you need a framework?

Wed, 05 Aug 2009 23:54:43 GMT

Nick, The container injects that. Setup is something like: Container.Register(Component.For Global.CurrentSession) .LifeStyle.Is(LifestyleType.Transient)); >

Nick Aceves commented on Do you need a framework?

Wed, 05 Aug 2009 23:52:12 GMT

Oren, How do you usually refer to your session in services, controllers, etc? Do you inject the current session using Windsor's factory method capability? I'm guessing that you're NOT actually referencing "Global.CurrentSession" everywhere...

Ayende Rahien commented on Do you need a framework?

Wed, 05 Aug 2009 23:17:20 GMT

Damien, OpenSession is _very_ light, yes. It just create a new session, and the session create a few objects. It is all in memory, and no DB is involved at all.

Damien Guard commented on Do you need a framework?

Wed, 05 Aug 2009 23:11:43 GMT

Is SessionFactory.OpenSession() very lightweight because you call it on every request even if you have pages that don't need it. I would have thought the lazy construction in CurrentSession get would have been a little safer. [)amien

Ayende Rahien commented on Do you need a framework?

Wed, 05 Aug 2009 22:49:48 GMT

Bunter, No, I can't. Not and manage them. The cost of managing the dependencies is just too high

Bunter commented on Do you need a framework?

Wed, 05 Aug 2009 22:47:12 GMT

That's heresy! :) But you _can_ have simple libs, you know.

Phil commented on Do you need a framework?

Wed, 05 Aug 2009 22:09:34 GMT

I typically let my IOC container take care of creating sessions for me. I use StructureMap to cache the session factory as a singleton and then I have a session injected into the controller.

Ayende Rahien commented on Do you need a framework?

Wed, 05 Aug 2009 21:55:23 GMT

Igor, Transactions are handled in a separate manner. Usually as part of the controller level, which orchestrate operations

Ayende Rahien commented on Do you need a framework?

Wed, 05 Aug 2009 21:54:45 GMT

DaRage, You tend not to do things like that, just because the user doesn't do things like that. But note that a session doesn't equate to a transaction.

Ayende Rahien commented on Do you need a framework?

Wed, 05 Aug 2009 21:54:02 GMT

Nicolas, Yes, it would. Now I would need to manage configuration for it, I would need to carry on the DLL that contains it. It is more of a mess than helping, just from dependency management perspective.

Igor T. commented on Do you need a framework?

Wed, 05 Aug 2009 21:20:25 GMT

Where/how are you calling the Flush()/Commit()/etc methods?

Dmitry commented on Do you need a framework?

Wed, 05 Aug 2009 21:18:25 GMT

I agree with Nicolas. HttpModule's basically are reusable Global.asax.cs files and they do not interfere with application specific logic that might be in the Global.asax.cs.