Another thing that we covered at my recent presentation was common use cases of Singletons.  The problem with artificial examples is that you're often presented with objections that the point you're making is restricted to the particular example you've given.  So, instead, let's take a look at some of the most common usages of singleton patterns and explain why you're breaking your code to use them: The Current User I've lost count of the number of times I've seen the current logged-in user accessed through a static method.  It's extremely tempting: there's a phenomenal number of parts of your system...