Re: Design Patterns

=?ISO-8859-1?Q?Arne_Vajh=F8j?= <>
Tue, 05 Feb 2013 19:50:46 -0500
On 2/5/2013 12:53 PM, Daniel Pitts wrote:

On 2/4/13 6:31 PM, Arne Vajh?j wrote:

On 2/4/2013 11:44 AM, Stefan Ram wrote:

Joerg Meier <> writes:

While we are talking about design patterns, you should be aware that
a lot
of people now consider Singletons an antipattern. Your usage of them
certainly sounds like the justly despised "global variable" replacement
many people abuse them for. Might be a good idea to reconsider that

   Pattern or anti-pattern, I never encountered a situation where I
felt a
   need for ?singletons?.

Other have.

GoF has it.

Spring has had it since 1.x.

EJB got it in 3.1.

Implementations and usage are very different, but the idea of
everybody using the same object is the same.

I think the real anti-pattern is the common implementation of how to get
the value of the singleton. Singleton's are useful, but when the
singleton status of an object is enforced beyond reason, you end up with
with all kinds of "work-arounds" to the fact that the object is a

What workarounds are you thinking of?


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