We all know the benefits of interfaces.
Programming to interfaces is a new way of Enterprise architecture for multi-layered, test driven, loosely coupled systems.
Service oriented Architecture - [SOA]
There are various ways of inversioning the control.The leightweight containers try to invert "hard-wire" coupling of interface-concreate implementation to "configurable" injection so that the "atomic" independent services are developed that can be used without knowing the actual implementation details. The service client can just concentrate on the Service API for their usage.
This kind of "IoC" is also called "Dependency Injection".
Following are the Java Community Dependency injection methods
1.Constructors injection
- Pica Container, Spring
2.Setter Injection
- Spring
3.Interface Injection
- Avlon
Spring - Setter Injection : Dependency Injection
This is the most widely used IOC methodology adopted by Spring and supported by various other IoC frameworks
The injections can be java-coded or XML configured as bean definitions.
Singleton/Non-Singleton beans are created and managed by Spring Framework.
Detailed code example on the way.....
Refer for more details : http://martinfowler.com/articles/injection.html
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