News Feed
Sections




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

QaFoo Blog:
ContainerAware Considered Harmful
October 08, 2013 @ 10:10:06

In this new post to the QaFoo blog they talk about a common pattern in framework development - the injection of a dependency injection container - and, more specifically, the ContainerAware interface in the Symfony2 framework and why it's "considered harmful".

The ContainerAware interface (actually ContainerAwareInterface, ContainerAware is a basic implementation of it) is part of the Symfony2 API, but a similar concept is known from many other frameworks and many applications rely on it. It defines only the one method setContainer(), which allows to inject the DIC into into an object so that it can directly retrieve services from it. [...Issues with it include the fact that] accessing the DIC in your classes can seriously harm maintainability and code re-usability in the long run.

They talk about three things specifically that using this sort of development pattern can cause in your application:

  • Reduced testability
  • Hidden dependencies (harder to see when a class has too many)
  • Feature sneak-in (that could promote bad usage practices)
0 comments voice your opinion now!
containeraware harmful dependencyinjection container dependency injection

Link: http://qafoo.com/blog/057_containeraware_considered_harmful.html

blog comments powered by Disqus

Similar Posts

Timothy Boronczyk's Blog: Spaghetti Code Considered Harmful

Gonzalo Ayuso: Auto injecting dependencies in PHP objects

Gonzalo Ayuso: How to configure Symfony’s Service Container to use Twitter API

Gonzalo Ayuso: Building a Pimple/Container from a YAML file

Fabien Potencier's Blog: Do you need a Dependency Injection Container?


Community Events





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


podcast framework language conference interview community unittest threedevsandamaybe introduction opinion api release laravel symfony composer configure list series voicesoftheelephpant version

All content copyright, 2015 PHPDeveloper.org :: info@phpdeveloper.org - Powered by the Solar PHP Framework