2012/2/7 jcbollinger <john.bollin...@stjude.org>:
>
>
> On Feb 7, 7:33 am, Felix Frank <felix.fr...@alumni.tu-berlin.de>
> wrote:
>> Hi,
>>
>> On 02/07/2012 01:56 PM, jimbob palmer wrote:
>>
>> >> sorry for jumping to conclusions, but your questions suggest that you're
>> >> > committed to some rather horribly design ideas.
>> > Then please educate me! What's horrible about it?
>>
>> There are few use cases for parameterized classes, and also few for
>> inheritance. Combining them could be considered an advanced concept.
>> There is nothing here that suggests you need either technique.
>
>
> +1
>
>
>> >> > Can you add some meat to your inquiry? What are your trying to achieve?
>> > I have a class which represents a group of yum repositories
>> > (something::blah) and that class calls each repository
>> > (something::aaa)
>>
>> You probably want to create a custom type like
>>
>> define my_yum_repo($url) {
>> yum_repo { $name: ...
>>
>> }
>>
>> Then you can use it like this:
>>
>> class something {
>> my_yum_repo {
>> "internal_repo1": url => "http://...";;
>> "internal_repo2": ... ;
>> }
>>
>> }
>
>
> I have a class much like that in my own configuration, in fact.
>
>
> Addressing the question more generally, do not use class inheritance
> where what you really want is composition. That is, given
>
> class foo::common {
> # common stuff
> }
>
> use this:
>
>
> # The right way
> class foo::specific {
> include 'foo::common'
> # specific stuff
> }
So can I be sure that the include will run first, before the "specific
stuff" here?
>
>
> instead of this:
>
> # DONT DO THIS
> class foo::specific inherits 'foo::common' {
> }
Okay. So if I am not meant to use class inheritance for this, when
should I use it?
Is scoping different between include and inherits?
>
>
> And definitely do not use inheritance to try to indicate ownership or
> some similar concept -- that's alien to Puppet. Puppet has namespaces
> and scopes, but no native concept of class or resource ownership, and
> all declarations are globally visible once they are parsed.
>
>
> John
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