Friday, May 20
Don't call us, we'll call you
In the Java community there's been a rush of lightweight containers that help to assemble components from different projects into a cohesive application.Underlying these containers is a common pattern to how they perform the wiring, a concept they refer under the very generic name of "Inversion of Control".
In this article Martin Fowler digs into how this pattern works, under the more specific name of "Dependency Injection", and contrast it with the Service Locator alternative.
The choice between them is less important than the principle of separating configuration from use.
http://martinfowler.com/articles/injection.html#ComponentsAndServices
Spring is based on Inversion of Control (also called Dependency Injection) for wiring not only the component services together, but also their associated transaction contexts.
Dips at 8:04 AM