Unfortunately in Java, Singletons and thread-safety are inextricably linked
=(
Dhanji.

On Mon, Apr 27, 2009 at 7:09 AM, charlesbos73 <[email protected]> wrote:

>
> Hi,
>
> back in the days I wrote my own dependency injection framework.
>
> Really mostly to "grasp" what DI was all about.  And I'm sold :)
>
> I decided to give Guice a look and one of the very first sentence
> I find is this:
>
> "@Singleton indicates that the class is intended to be threadsafe"
>
> Now this is the most confusing sentence I've read in a while.
>
> Should it read:
>
> "@Singleton indicates that the class is intended to be instantiated
> only once and that this instance shall be re-used (re-injected)"
>
> (and, hence, of course, that it better be thread-safe, but this is a
> detail that has nothing to do with what a singleton is).
>
> Because, really, singletons have nothing to do with thread-safety.
> Heck, there are languages that aren't multi-threaded that can
> have singletons.
>
> Is Guice using the term "singleton" to mean something different
> than the definition that everyone came to agree on?
>
>
>
>
>
> >
>

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