I’ve always loved the Service locator pattern – why ? Because it requires so little maintenance, and it’s a very crucial point if you want somewhat automatic dependency injection.
As you can read in my blog post “Staying DRY: Mind those switch statements” a service locator can replace cumbersome multiple switch statements which require each one to be changed whenever a new case comes along.
DaLi is an ORM (Object-Relational Mapping) based around dot.net Reflection.
Whilst Reflection is inherently slow, I make use of quite a bit of caching to avoid any severe overhead. In fact DaLi performs at around 97 % of hand written ORM code.
I web applikationer har man tit behov for at cache f.eks. udtræk fra DB, det er dejlig nemt med HttpRuntime.Cache.
Men hvad gør man i ikke-web applikationer ?
Caching library’et er egentlig bare en egen udviklet cache ala. den man kender fra HttpRuntime.Cache.
Dog med et par forskelle, bl.a. kræver den ikke System.Web namespacet og den er generic (så ikke noget med at typecaste hele tiden). Ellers er brugen meget den samme.