Week #2 is coming to an end here at CrossCuttingConcerns, which means it's time for another link dump post.

• LIDNUG (Linked-in .NET user group) recently posted video of Gael Fraiteur at their user group meeting. This was recorded in November 2010, so it's a bit behind the times as far as PostSharp goes, but it's still an informative video.
• Here's a white paper comparing AOP to composition filters (CF). I've not heard of CF before this paper, but it seems that like AOP, CF aims to address the same limitations with cross-cutting concerns that AOP does. (PDF link)
• Taking the Single Responsibility Principle (SRP) seriously. A deep dive into SRP, and just what is a "responsibility" anyway?
• Another white paper, but this one is about an interesting use case of AOP. It's based on a project to "trace" an application: not in the traditional developer sense of tracing through the code, but rather tracing a user's actions as she uses the interface to a system. And then using that information for later analysis (perhaps a usability study?).
• A blog post from Kristijan Rebernišak about using AOP to check user permissions: he uses Google Guice with AOPAlliance.
• Chad England has started a blog post series on AOP with PostSharp.

Thanks for reading, and please leave a comment or use the contact link above if there's something you'd like to see covered here on CrossCuttingConcerns.com (or if you have something to say and want it published here).

This is the first "Weekly Concerns" (thank you Jason Karns for the name) post, of what is going to be a weekly series of blog posts that's basically just a Friday link dump. Not that each of these links don't deserve more attention and research, but, hey, I get lazy sometimes, alright!

• SharpCrafters webinar - "How to Stay DRY with AOP and PostSharp", featuring PostSharp developer Igal Tabachnik
• White paper from Cornell about using AOP in seperating concerns (available in PDF and other formats)
• The NDC conference in 2011 had an "AOP & IoC" track. I'm guessing many of you didn't make it to Norway for this conference (I didn't), but the NDC is kind enough to make video of the sessions available. Day 3, Track 5 features Gael Fraiteur (creator of PostSharp), Donald Belcham (fellow PostSharp MVP), and some other sessions about the more general topic of rewriting IL.
• SheepAspect for .NET - another AOP framework that uses IL rewriting. I've not heard of this one much, but it is open source and probably deserves a closer look (perhaps in a future blog post).
• AOP for Perl (yes, Perl!) with Aspect from Adam Kennedy (who has his own Wikipedia page), with a very comprehensive and well written README that's a pretty good primer on AOP in general.

I started doing some AOP screencasts for dimecasts.net some time ago. I had a roadmap in mind, but due to some unrelated events, I never got around to making the third one of these yet.

The first one is a pretty standard Hello World AOP 101 screencast that uses PostSharp: Getting Started with AOP Using PostSharp. 

The second one is called Working With Advanced Aspects, and just expands on some more PostSharp features around boundaries and interception.

I had definitely planned to do 2-3 more of these dimecasts, as sort of a way to give back to a site that helped me to learn some important tools and techniques in an efficient and convenient way.

So, I could continue with that plan, but if you have a suggestion as to what you would want to see in an AOP screencast, I'm all ears. Want to see some runtime AOP with Castle DynamicProxy? Or maybe some validation and initialization techniques with PostSharp? Or something else?