On Sunday, February 24, 2013 10:27:13 PM UTC-6, James Polley wrote:
>
> We're using ::params classes quite extensively to share values across all
> classes in a module:
>
> class myclass (
> $param1 = $myclass::params::param1
> ) inherits myclass::params {
> ... code ...
> }
>
> class myclass::subclass (
> $param1 = $myclass::params::param1
> ) inherits myclass::params {
> ... code ...
> }
>
> define myclass::definetype (
> $param2 = 'value2'
> ) {
> include myclass::params
> myvalue = $myclass::params::param1
> }
>
> class myclass::params () {
> $param1 = 'value'
> }
>
> The goal is that these values can be set in one place and get used
> everywhere throughout the module.
>
> This works just for for classes inside the module, because the 'inherits'
> forces the ::params class to be processed first.
>
> However, we consistently run into issues using define types from the
> module - we can't figure out how to guarantee that the ::params class gets
> loaded before the define types.
>
> (Scope(Myclass::Definetype[resourcename])) Could not look up qualified
> variable 'myclass::params::param1'; class myclass::params has not been
> evaluated
>
> I'm hoping there's something fairly simple I'm forgetting about that we
> can use to force the class to be evaluated before any instance of the types.
>
First off, defines are not classes and cannot be treated as such. Defines
act more like the built in resources - user, file, package etc.
If you need to make sure that your params class gets processed before the
defines, you can safely "include myclass::params" in it.
You may also want to look at NOT using inheritance at all for that, and
instead using "include". You can pair that with the anchor pattern or
"anchor-lite" to ensure ordering.
You may also find this article to be quite helpful. It has a good pattern,
and also shows "anchor
lite".
http://www.devco.net/archives/2012/12/13/simple-puppet-module-structure-redux.php
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