Dependency injection is not a virtue in Ruby (DHH)
By David Heinemeier Hansson on Jan 6, 2013 In languages less open than Ruby, hard-coded class references can make testing tough. If your Java code has Date date = new Date(); buried in its guts, how do you set it to a known value you can then compare against in your tests? Well, you don't. So what you do instead is pass in the date as part of the parameters to your method. You inject the dependenc
The DI Opposition
Another pile-on story; this time on David Heinemeier Hansson’s Dependency injection is not a virtue. I agree with every word DHH writes here, but I think I have a better example. Tl;dr: Statically-typed languages can make unit testing hard, so People adopt dependency injection to work around this, and In a sort of Stockholm-syndrome effect, people argue that DI is A Good Thing and over-use it, to
Real-World Scala: Dependency Injection (DI)
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-World Scala series I am going to discuss how to implement/achieve Depenency Injection (DI) in Scala. Scala is a very rich and deep language that gives you several ways of doing DI solely
Roberto Chinnici's Blog: Dependency injection in Java EE 6
Posted by robc on August 04, 2009 at 12:03 PM | Comments (0) One big topic of discussion at JavaOne was the recently filed JSR-330, "Dependency injection for Java". As many of the comments during the JSR approval ballot made clear, some alignment of JSR-330 and JSR-299 (formerly knows as "Web Beans") was in order. What would be the point of having a JSR to help reduce fragmentation in the dependen
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TheServerSide | Your Java Community discussing server side development
OpenAI API tutorial: How to use AI prompt chaining This walkthrough teaches developers how to chain AI prompts and models using the OpenAI API, in this case to identify and present specific data from William Shakespeare plays. Get started with Spring Tools Suite 4 Getting started with Spring Boot has never been easier. The Spring Tools Suite for Eclipse comes with everything you need to write, com
Constructor Injection vs. Setter Injection
A big pro for constructor injection is the possibility to build immutable objects out of it. ReplyDelete That's all sounds very good, immutability is good. But, I don't agree that code is easier to read with constructor injection. When there are many depended objects, and especially, if they are of the same class it becomes hard to read and to write such code. In your example you have Database db
When to use Dependency Injection
Don't forget Plexus. I think more people are unwittingly using Plexus every day than something like Pico, it is at the core of Maven. ReplyDelete I'll defend Spring here... Spring has a very good deployment package and you can easily only include the DI jars and not include all the others. Don't use what you don't need. Spring supports annotations, in fact I would have said it is the recommended c
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Re: jersey guice adapter
http://blogs.sun.com/sandoz/entry/ejb_injection
Circular Dependency in constructors and Dependency Injection
Dependency Injection in EJB 3 - DZone Refcardz
Guice and JavaConfig: Two Approaches to IoC through Annotations
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