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Friday, November 09, 2007 3:34 AM

TechEd Sessions Sample Code

Now that both of my TechEd sessions are over, I've had some request for the sample code that I demonstrated at both sessions. The sample code I used at the interactive talk on TDD is attached to this post. The code I demonstrated at my talk on manual
Posted by ploeh | 0 Comments
Attachment(s): MediaLibrary.zip
Saturday, September 29, 2007 5:48 PM

CovariantCollection

One of the known limitations of .NET generics is the limited support for covariance. This is sometimes a challenge when it comes to collections. As an example, consider this simple abstract class: public abstract class MyClass { protected MyClass() {
Posted by ploeh | 1 Comments
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Monday, August 20, 2007 10:38 PM

User Context

Besides logging, one of the most common types of ambient context is the user. Who is the user? Was the user authenticated? What is the user allowed to do? Since being able to answer these questions are such common requirements in software development,
Posted by ploeh | 1 Comments
Saturday, July 28, 2007 8:56 PM

Call Contexts vs. ASP.NET

In my former post on Ambient Contexts , I described how you can use CallContext or Thread Local Storage (TLS) to store a context that is specific to the current context of a call. As it turns out, ASP.NET uses a threading model that disables this approach
Posted by ploeh | 1 Comments
Monday, July 23, 2007 11:06 PM

Ambient Context

These days, I'm becoming increasingly enamored with the idea of implementing cross-cutting concerns using Thread Local Storage (TLS) or the current call context. For the most typical aspects of software, such as security and logging, the .NET framework
Posted by ploeh | 11 Comments
Wednesday, July 11, 2007 10:56 PM

Imperative Configuration

How can I unit test my application with different configuration settings? A couple of months back, a reader asked me this question, and while I provided an immediate response via email, I think that the question deserves a post of its own. In .NET, using
Posted by ploeh | 7 Comments
Monday, June 18, 2007 9:33 PM

Using Decorators For Inter-Layer Communication

While I hope that my previous post made it clear that Data Transfer Objects are not my first choice for transferring complex data between layers, I still owe my faithful reader(s) an outline of a better alternative. One option is to define an abstraction
Posted by ploeh | 2 Comments
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Monday, June 18, 2007 9:29 PM

What's An Entity, Anyway?

These days, I seem to be encountering a lot of entities . Not in the sense of non-corporeal beings as usually depicted in certain science fiction TV shows, but in the sense of data structures. Sometimes, they are called business entities . Although the
Posted by ploeh | 5 Comments
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Saturday, June 02, 2007 11:11 PM

State Your Dependency Intent

There are several different ways to implement Dependency Injection (DI), and Martin Fowler describes four of them in his excellent article on IoC/DI . In this article, the first three approaches (Constructor, Property, and Interface Injection) are mainly
Posted by ploeh | 8 Comments
Wednesday, May 30, 2007 4:33 PM

Code As Dependency Configuration

In his article on Inversion of Control and Dependency Injection , Martin Fowler has a quite interesting section towards the end where he talks about how to configure loosely coupled systems. One of his points is that in some cases, it makes more sense
Posted by ploeh | 14 Comments
Wednesday, May 30, 2007 12:22 PM

Reasons For Isolation

Object-oriented applications above some level of complexity are almost always modelled as a layered architecture. While the typical three-layer architecture remains the most widely known, n-layer architecture is also often utilized. Here's a typical design
Posted by ploeh | 6 Comments
Sunday, May 20, 2007 2:05 PM

Authorizing Services

If you look at the default authorization model for WCF, you will notice that it expects you to implement centralized authorization. While centralized and pluggable authentication makes a lot of sense to me, that's not the case with authorization. Does
Posted by ploeh | 4 Comments
 
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