Browse by Tags

Domain Models in presentation frameworks

One common question when applying DDD is how to interpret other architecture’s concepts of a “model”. For example, two common presentation architectures are MVC and MVP. In each of those acronyms, the “M” is short for “Model”. So what...

Published Mon, Dec 12 2008 10:35 PM by bogardj

Filed under: Domain-Driven Design, Patterns, ASP.NET MVC

Strategies and discriminators in NHibernate

I recently posted about enumeration classes , and how I like to use them as a sort of "Enumerations with behavior". Not every enumeration should be replaced with a class, but that pattern helps quite a bit when I find a lot of switch statements...

Published Tue, Aug 08 2008 11:44 PM by bogardj

Filed under: Patterns, NHibernate

Separation of Concerns by example: Part 3

We made quite a bit of progress separating out the concerns in Part 2, but there are still some issues with our current design. Other parts in this series include: Separation of Concerns - how not to do it Separation of Concerns by example: Part 1 - Refactoring...

Published Thu, Jun 06 2008 11:14 PM by bogardj

Filed under: Patterns, Refactoring, LINQ to SQL

Unit testing MonoRail controllers - Redirects

When developing with MonoRail , one of the common operations is to redirect to other controllers and actions. Originally, I looked at the BaseControllerTester to help test, but it required a little too much knowledge of the inner workings of MonoRail...

Published Mon, Feb 02 2008 9:40 PM by bogardj

Filed under: Patterns, Testing, TDD, MonoRail

Intention-concealing interfaces: blob parameters

When someone is using your code, you want your code to be as explicit and easy to understand as possible. This is achieved through Intention-Revealing Interfaces. Evans describes the problems of opaque and misleading interfaces in Domain-Driven Design...

Published Thu, Nov 11 2007 10:27 AM by bogardj

Filed under: Domain-Driven Design, Patterns, C#

Specifications versus validators

Joe posed a great question on my recent entity validation post : I question the term Validator in relation to DDD. Since the operation of the Validator seems to be a simple predicate based on business rule shouldn't the term Specification [Evans Pg227...

Published Thu, Oct 10 2007 9:19 AM by bogardj

Filed under: Domain-Driven Design, Patterns

Entity validation with visitors and extension methods

On the Yahoo ALT.NET group , an interesting conversation sprung up around the topic of validation. Entity validation can be a tricky beast, as validation rules typically depend on the context of the operation (persistence, business rules, etc.). In complex...

Published Wed, Oct 10 2007 10:52 AM by bogardj

Filed under: Patterns, C#

Template Delegate Pattern

This post was originally published here . I've had to use this pattern a few times, most recently in Behave# . It's similar to the Template Method pattern , but doesn't resort to using subclassing for using a template method. Instead, a delegate...

Published Wed, Aug 08 2007 8:51 PM by bogardj

Filed under: Patterns, C#, Refactoring

Syndication

Recent Posts

Tags

News

Archives