Yves Reynhout's Blog - All Comments

re: Beware of using the ThreadStaticAttribute in an ASP.NET environment

wekempf — Fri, 05 Sep 2008 17:23:38 GMT

I'm not going to address the problem you think exists here. Let others do that. But I want to point out your code has several glaring problems.

1. You should never lock a Type object. (msdn.microsoft.com/.../1c9txz50.aspx).

2. The DCL (double-checked lock) pattern is dangerous and rarely needed on .NET. On many platforms, DCL is broken. The .NET VM actually provides for properly using the DCL regardless of the platform the byte code is eventually compiled on, but it requires the use of "volatile" or "MemoryBarrier", which you've not done. For a singleton, however, you can and should just rely on the language semantics of static constructors and not use the DCL (of course, in this case it's not a traditional singleton, but see the next point). (blogs.msdn.com/.../volatile-and-memorybarrier.aspx)

3. In this case, the DCL isn't needed. "_instance" is "ThreadStatic" and can't be accessed by other threads. No synchronization is required for the initialization code.

Beware of using the ThreadStaticAttribute in an ASP.NET environment -

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re: Beware of using the ThreadStaticAttribute in an ASP.NET environment

Alex — Tue, 26 Aug 2008 21:05:22 GMT

I am a little bit puzzeled as to why you have to do a lock on the object if the static instance is declared as ThreadStatic, and therefore is not shered between threads.

re: O/R Mapping - Tools, Libraries & Frameworks

Peter Morris — Tue, 29 Jul 2008 16:48:30 GMT

ECO has moved to http://www.capableobjects.com

Pete

re: O/R Mapping - Tools, Libraries & Frameworks

aspnetNovice2007 — Sun, 13 Jul 2008 14:27:18 GMT

I use VS 2008, C#, and Telerik controls. I'm seeking to make a wise decision on an OR/M to ease the pain of the backend "data stuff" whilst adhering to development of "proper" n-layer design.

My research so far has me down to:

- LLBLGen Pro

- Opf3

- EntitySpaces

- SubSonic.

I'm also aware of the existence of a term called "Entity Framework" by Microsoft. Same goes for LINQ. I've used a "hint" of LINQ so far.

Can anyone shed light on their experience / knowledge of one or more of these tools? Any advice you have I would appreciate, even if it's not in this list.

My goal is to select a path which will serve me in the long-term (e.g. I don't want to invest my time and project code to a particular solution only to have it / its company dissolve in two years).

Your input is valuable and much appreciated.

Thank you for your efforts. I look forward to your feedback.

re: O/R Mapping - Tools, Libraries & Frameworks

Amara — Sun, 04 May 2008 12:30:21 GMT

I totally agree with u. Thanks for such a good suggestion.

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Amara

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ORM - Should we move to ORM instead of keep up with conventional DAL ?

Vu Nguyen's Blog — Mon, 28 Apr 2008 15:15:12 GMT

ORM - Should we move to ORM instead of keep up with conventional DAL ?

re: O/R Mapping - Tools, Libraries & Frameworks

Jeremy Connell — Mon, 14 Apr 2008 19:27:59 GMT

Sorry, that url was:

www.codeplex.com/jeremydotnet

re: O/R Mapping - Tools, Libraries & Frameworks

Jeremy Connell — Mon, 14 Apr 2008 19:09:51 GMT

This .Net solution is completely free, capable, and transparent. Feedback is appreciated.

re: O/R Mapping - Tools, Libraries & Frameworks

landofcash — Fri, 11 Apr 2008 12:53:07 GMT

hi all

my 5 cents ;)

open source, easy to start & use asp.net ORM lib

support native SQL no stupid pseudo SQL syntax ;)

some docs, demo and sources at

www.codeplex.com/easypersist

Thanks!