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(Annotated) Field injection vs Constructor injection

royvanrijn — Tue, 21 Sep 2010 10:35:41 +0000

A couple of people replied to my last article about constructor vs setter injection that they prefer a third option, field injection. This is a slight variant of setter injection in which we magically let the setter dissapear.

So, another blogpost here!

Let me first show what field injection looks like:

public class [...]

Setter vs Constructor injection

royvanrijn — Mon, 20 Sep 2010 21:59:44 +0000

Recently I’ve had a discussion with a collegue about Setter vs Constructor injection. For those who don’t know what I’m talking about a quick example:

Setter injection:

public class SomeClass { private SomeDependency someDependency; public SomeClass() { //Empty constructor } public void setSomeDependency(SomeDependency someDependency) { this.someDependency = someDependency; } }

Constructor injection:

public class SomeClass [...]

Learn to use Dependency Injection

royvanrijn — Mon, 18 Jan 2010 16:43:08 +0000

Recently I placed a comment on this interesting blog from Uncle Bob Martin (Robert C. Martin). It contains a brief description on how I teach people how to use the Spring Framework. Now, by popular demand (one person requested it over Twitter), I'll guide you through the method and examples I use in this blogpost. It explains why people should use frameworks like Spring and/or Google Guice, and how.

Testing with Spring

royvanrijn — Tue, 08 Dec 2009 22:49:31 +0000

To improve the quality of your code it is important to thoroughly test your code. Not only using unit tests but also using integration tests. I’ll describe these terms and show examples on how to create tests using JUnit and Spring’s Test library.

Unit Testing

A unit-test is an automated test that tests one single [...]