MVC :: Implemented NHibernate / Application Completely Unstable?
Jun 1, 2010
I tried to figure out NHibernate (a first) First went through chapter 23 in Asp.Net MVC in Action 2, and read some articles to get the drift.
Then I modified the sample in the above book to work with my own database and my own table. Finally got that working. (Started messing with this yesterday afternoon....it's 7:30 AM, so .... I'm tired...)
Then I worked this into my own project (the shared mvc template some of you might have looked at).
Now my application became completely unstable. Sometimes it work, but other times it bombs out where my controller factory (Castle) set the component lifestyles:
[Code]....
Each time with some LoaderException that read like {"Could not load file or assembly 'Castle.Core, Version=1.1.0.0, Culture=neutral, PublicKeyToken=407dd0808d44fbdc' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)":"Castle.Core, Version=1.1.0.0, Culture=neutral, PublicKeyToken=407dd0808d44fbdc"}
Man I fiddled all over the place, having xcopy copy dll's (see krok.web properties got a post build event) and many other things I that does not really make sense.
And from the darned instructions, having all your dll's in a folder which get copied out to the web project's bin folder and dont know what else.
Seriously...if someone can download this and have a look (better not if you dont know Castle Windsor and NHibernate)
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I see there are 2 possible scenarios as to the session handling:
Open one single ISession per request. Open it at request start and close it at request end.Open one ISession per conceptual "unit of work". Many sessions are created for a request.
The approach #1 is the one I'm doing now. I'm a little bit worried about it because, although it works, it's a little bit difficult to debug. For instance, I have an object not being saved (even though I ordered it to) and I'm having trouble debugging since there's a LOT of things happening during a complete request life-cycle.
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I have scoured the web and have yet to find and example that matches my requirements.
What I have is an existing multi-tenant asp.net application where all users authenticate against a single SQL Server database. This database also contains several other settings type data that is used within the application. Each client after authentication, utilizes thier own SQL Server database for data storage, for isolation purposes. Essentially all of the client database are identical and reside on the same server, but reside on one or more servers as well.
The application is currently written in asp.net 2.5 framework and utilizes the Micrsoft Practices Enterprise Library for DAL. Wnd we are looking to migrate to 4.0 and implement NHibernate to replace the MPEL.
I have implemented a solution already using NHibernate and the 4.0 framework, so I am familar with the concepts. I found the resources for my current session manager here as a matter of fact. But that application only had a single database, so not much too it.
The implementation is essentially what you see here:
[URL]
The other solutions that I have seen multiple config entries and/or files to manage this, but that is not desireable, since we may add new clients frequently and all of the connection information is already maintained in the authentication database.
[code]....
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