News Feed
Sections




News Archive
Looking for more information on how to do PHP the right way? Check out PHP: The Right Way

Nay Pryce's Blog:
"Dependency Injection" Considered Harmful
January 10, 2011 @ 12:05:59

While it's not PHP specific, this recent article from Nat Pryce talks about dependency injection and how the pattern could be considered harmful in the wrong (framework's) hands.

There are two aspects to Dependency Injection. Firstly, an object's interface should define the services that the object requires as well as those it provides. Secondly, the code that satisfies the requirements of an object by giving it a reference to the services of is collaborators is external to both the object and its collaborators. [...] The name "Dependency Injection" only relates to the second aspect. And worse, makes it sound like dependencies are "injected" through the object's encapsulation boundary rather than explicitly defined as part of the object's API.

He gives an example from the GOOS project where objects are independent and APIs are defined in such a way that any dependencies are clearly distinguished. "Code that composes objects is separate from the objects being composed".

The end goal is to need less and less code to write more and more functionality as the system grows.

Be sure to check out the comments on the post for some other good opinions and suggestions regarding dependency injection and its use in frameworks.

0 comments voice your opinion now!
dependency injection harmful opinion framework


blog comments powered by Disqus

Similar Posts

Paul Jones' Blog: Zend Devzone Podcast: Solar Overview

Andrew Podner: CodeIgniter: Keeping M-V-C straight

Kyle Brandt's Blog: Should Developers have Access to Production?

DevShed: Service Layers in PHP Applications (a Series)

Marcus Whitney's Blog: Stop the Zend bashing...it's old.


Community Events





Don't see your event here?
Let us know!


framework update version library release language composer podcast security opinion package interview laravel tool introduction community install voicesoftheelephpant series symfony

All content copyright, 2014 PHPDeveloper.org :: info@phpdeveloper.org - Powered by the Solar PHP Framework