Last November we got Spring 2.5 and with it the possibility to use annotations for dependency injection (DI). Annotations can be used instead or mixed with the classic application context file(s) based on XML. If you compare the former more complex XML configurations with what you still have to keep, after using annotations, it’s quite… Continue Reading
Tag Archives: 3D
How to Decontaminate a Singleton
For about three years now there’s a debate about using the Singleton pattern. Some call it evil, anti-pattern, and the like. If you have a look at the Gang of Four (GoF) patterns you’ve to realize that they are still present in the community, even more than 10 years after first publishing of the book…. Continue Reading
The Observer Pattern in Mixed Dependency Injection Contexts (Spring, JSF)
One of the most well-known patterns is the Observer pattern, well described in the Gang of Four (GoF) book. It allows to separate the application logic from the view(s) (if you have the focus on MVC implementations) or simply implements a notification mechanism that allows to update objects if others change their state (publisher –… Continue Reading