If you try to do it without eval and you don't have the apache stuff
on your classpath, then you get an exception while compiling, before
class/forname is ever called.

On Nov 22, 11:33 am, vitalyper <vitaly...@yahoo.com> wrote:
> Gary,
>
> You were right with your initial reply. Sorry I did not get it. Thanks
> for your help in understanding this.
>
> On Nov 22, 1:58 pm, Gary Trakhman <gary.trakh...@gmail.com> wrote:
>
>
>
>
>
>
>
> > Also I think this line doesn't actually do anything:  (Class/forName
> > "foo.bar")
>
> > It will effectively just ask the classloader to load the class.  You
> > removed more than the eval in your referenced code, you removed the code
> > that did anything.   That code needs to be there.  It's eval'd because it's
> > not guaranteed to be compilable for projects without commons-logging in
> > their classpath.
>
> > (defn cl-factory
> >   "Returns a Commons Logging-based implementation of the
> > LoggerFactory
> > protocol, or
> >   nil if not available."
> >   []
> >   (try
> >     (Class/forName "foo.bar")
> >     ; eval removed
> >     (catch Exception e nil)))

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