On Tuesday, June 26, 2012 6:14:32 AM UTC-4, Stephen Gran wrote:
>
> Hi,
>
>
>
> On Tue, 2012-06-26 at 11:47 +0200, Felix Frank wrote:
> > Hi,
> >
> > On 06/26/2012 10:56 AM, Stephen Gran wrote:
> > > There is one difference that is most likely a bug. try this manifest:
> > >
> > > ./test.pp
> > > class { 'wobble': }
> > > class { 'wibble': }
> >
> > I disagree on this being a bug.
> >
> > This syntax is for parameterized classes. Such classes cannot be
> > declared more than once, because the declaration binds parameter values
> > that cannot be sanely changed at a later point of compilation.
> >
> > So multiple usage of this syntax is not supported.
> >
> > I'd suggest avoiding it if it's not needed pass actual class parameters.
>
> I disagree that instantiating a class twice with identical (especially
> default) parameters should result in an error. A class is a singleton,
> unlike a define, so should not be indexed solely on it's name. It
> should be an error to try to redefine the parameters that you
> instantiate a class with, of course.
>
> However, I see that this is probably not a trivial change, and I don't
> think it's that big a deal, in practice. It does mean jumping through
> some hoops when you have something like multiple application classes
> using a single parameterized configuration class, but it can be lived
> with.
>
I think I'm good with only allowing declaring a class once with parameters
it makes since that puppet can't make a decision on which set of parameters
to use what with not being able to read your mind and all. :-)
I would like to be able to include a class in multiple places even if I
have declared the class with parameters somewhere else in the catalogue. As
it works now I can do this as long as the first place the compile sees the
class is the declaration with parameters. If you include a class before
the compiler gets to the parameterized declaration you get the error
complaining about declaring a class more than once. I sort of view an
include as saying "I just need some stuff from that other class so I can
reference it here and I don't really care what parameters are passed to
it". Declaring a class with parameters is for the cases where I do need to
be specific.
Russell
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