A quick rant about dependency injection.

I see far too often in projects, a huge over-reliance on dependency injection / IOC frameworks which permeate throughout the entire codebase.

I cringe every time I see a constructor annotated with @Inject and 10 params.

The benefit of these frameworks is how easy they make it to manage many dependencies. What I dislike about them, is exactly that. I feel that they make it TOO easy to manage many dependencies.

How trivial is it to simply add another constructor param? exactly. And people then wonder why their dependency tree looks insane.

I am a strong believer in injecting dependencies the traditional way, via the constructor with no fancy framework. The reason being that it forces you to think more about the dependencies you are adding to your classes, and consider if they are really all needed.

The other problem I have with it, is it basically encourages you to inject everything because its so easy. The purpose of dependency injection is inversion of control and allowing classes to depend on abstraction rather than concrete implementation. All that goes out the window when you @Inject 6 different concrete classes.

Use dependency injection for its intended purpose, not as an excuse to be lazy and avoid thinking about dependencies.