Puppet users - Sep 2014 - About the "params" pattern

Hi,

About the "params" pattern, I had read this article :

http://garylarizza.com/blog/2014/02/17/puppet-workflow-part-1/

Suppose I want to use the "params" pattern in my modulees (ok there
really is no *better* way but imagine I want to use this way). In
the article, the author explains that, for the "top level" class of
my module, I can use this way :

    class my_module (
      $var1 = $my_module::params::var1,
      $var2 = $my_module::params::var2,
      $var3 = $my_module::params::var3,
      ...  
    ) inherits my_module::params {
        # The body of the class
    }    

Ok, I understand that. But what about an internal class of my module?
If I want to define an internal class (my_module/internal.pp) which
will be declared in the "my_module" class, what is the
"best" way?

In the internal class, I want probably to use some parameters of
the "my_module" class and some variables of the my_module::params
class. How can I do that? Like below? I have doubts because in this
cas I have lot of inheritance and I understand that it was not a
good thing.

    # Definition of the my_module::internal class
    # I need to the value of $var2 and $var3 of "he "top level"
class my_module
    # and I need to parameters in my_module::params.
    class my_module::internal (
      $var2,
      $var3,
    ) inherits my_module::params {
      # The body of the class
    } 


    # Declaration of my_module::internal class in the my_module class
    class my_module (
      $var1 = $my_module::params::var1,
      $var2 = $my_module::params::var2,
      $var3 = $my_module::params::var3,
      ...  
    ) inherits my_module::params {
        # The body of the class


        class my_module::internal {
          var2 => $var2,
          var3 => $var3,
        }

    }   

Thanks in advance for your help.
François Lafont

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