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Zend Framework 2 providesits own dependency injection container, Zend\Di which is a key underpinning of the entire framework and especially the MVC system. I have covered before, my thoughts on the reasons for using dependency injection, so this article looks at the fundamentals of using Zend\Di. Constructor injection Consider this code: namespace My; classDatabaseAdapter { } class UserTable { p
Zend Framework 2 comes with a dependency injection container (DIC), as does Symfony 2 and Aura, along with many otherPHP frameworks that targetPHP 5.3 or higher nowadays. This article attempts to explore the problem that a DIC tries to solve. Consider thissimple (contrived!) example of an Album object that has an Artist object: class Album { protected $artist; public function getArtistName() {
Spring Frameworkというと、Seasar2と共にDIとAOPの軽量コンテナーとして知られており、オープンソースのJavaのフレームワークであるというというのがいまだに多くのJava開発者の間では常識かもしれません。しかし、SpringSource社が2009年の夏にVMWare社に買収されてから、クラウド上の標準Javaアプリケーション開発プラットフォームとしての色彩を急激に濃くしているようです。残念ながらJavaEE標準が現時点では明確なクラウド対応の標準プラットフォームにはなっていないこともあり、クラウドの時代になってJava開発者は今後どうすればよいのだろうとちょっと不安になってしまうところもあったのですが、デファクトスタンダードであるSpringベースのアプリケーションが今後クラウド環境上で動作するようになるのであれば、現在のフレームワークの知識も生かせるし、将来に対
Putsimply,Guice alleviates the need for factories and the use of new in yourJava code. Think ofGuice's @Inject as the new new. You will still need to write factories in some cases, but your code will not depend directly on them. Your code will be easier to change, unit test and reuse in other contexts.GuiceembracesJava's type safe nature. You might think ofGuice as filling in missing featu
Inversion of Control Containers and the Dependency Injection pattern In theJava 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 I dig
Update: Corrected typo in the Cake Pattern version of the last example. Update: Added a version of the last example using the Cake Pattern for easier comparison (see end of post). In this second post in the Real-WorldScala series I amgoing to discuss how to implement/achieve Depenency Injection (DI) inScala.Scala is a very rich and deep language that gives you several ways of doing DI solely
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