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The Singleton Anti Pattern?

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Thomas Woelfle

Posts: 4
Nickname: woelfle
Registered: May, 2007

Thomas Woelfle is a Java developer with strong interest in functional programming

The Singleton Anti Pattern?

Posted: May 2, 2007 3:38 AM

This post originated from an RSS feed registered with Java Buzz by Thomas Woelfle.
Original Post: The Singleton Anti Pattern? Feed Title: Woelfles Welt Feed URL: http://woelfle.blogspot.com/feeds/posts/default Feed Description: A Developers Diary	Latest Java Buzz Posts Latest Java Buzz Posts by Thomas Woelfle Latest Posts From Woelfles Welt

While refactoring some eclipse plug-ins I've realized again that to me the well known singleton pattern becomes more and more an anti pattern.
At a first glance it looks like a useful pattern to make some class accessible from everywhere. But after some time one begins to recognize the problems that come up with singletons. I've you've ever tried to write a unit test for a class that makes use of a singleton you know what I mean.
But the most critical problem comes up with singletons is that you are probably not aware of the dependencies introduced between classes and components. And dependency management is one of the most difficult things when developing code and one of the most expensive things when it comes to maintenance.
So using a pattern which does not support me handling my dependencies but which makes dependency management more difficult seems to me more of an anti pattern than a pattern.

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