Dependency Injection

'I really enjoy reading a book that can show me a new approach to what I have already considered well understood and barely surprising. I'm currently learning Java EE 6 and has begun my journey to the area of the Contexts and Dependency Injection for the Java EE platform and the Java EE 6 Managed Beans specifications. I can't really explain why I picked up these specs, but they made me wonder about the current state of dependency injection containers. It looks to me that JEE6 application servers are not that much explored and quite often loaded with applications that are in turn managed by Spring Framework and its kind of kitchen-sink stack. Many developers put their faith in Spring Framework and look no further. It is as though a sole Java EE application server were less important and the only trusted solution were Spring Framework itself which eventually became the Java EE application server. Too bad. The book "Dependency Injection, Design patterns using Spring and Guice" by Dhanji R. Prasanna from Manning has showed me that there's a hope for such a thinking and Guice comes to our rescue - to those passionate enterprise Java developers who once thought a Java EE application server has been too much burden on their shoulders and Spring Framework + Apache Tomcat combo has been enough. My take on it is that Spring Framework requires now so much time to understand how it works that one can hardly find a few spare cycles to look for and afterwards evaluate alternatives. The initial attempts of Spring Framework to lend a helping hand to us and ease development of Java enterprise applications had certainly been achieved, no doubt about that, period, but the development of Spring Framework didn't stop that led to create another 100-pound gorilla. It's now something bigger than a mere DI container and as much complicated as its origins once were. With that gut feelings, one day I noticed this book begging for my reading and without much excitement yet wondering what I could learn about dependency injection I grabbed