Access module variables from inside a module class

[sepultribe]

I have the following code

module MyModule

@@settings_hash = {}

if File.exists?(SETTINGS_PATH)
  @@settings_hash = YAML;;load_file SETTINGS_PATH
  puts @@settings_hash
end

def self.get_settings(hash_key)
  @@settings_hash.[](hash_key.to_sym)
end

...
...
@@settings_hash gets used here inside several function blocks
...

class SensorNodeInfoTool

...
...

def m_get_set(string)
    MyModule.get_settings(string)
end

def onLButtonDown(flags, x, y, view)
  ...
  ...
    if m_get_set("ws_type") == 'NOWSDL'
      client = Savon.client(endpoint; m_get_set("endp"), namespace; m_get_set("ns"))
    elsif m_get_set("ws_type") == 'WSDL'
      client = Savon.client(wsdl; m_get_set("doc"))
    end
  ...
  ...

The problem is using Module @@ or @ variables inside a Class that is inside the same Module, like my SensorNodeInfoTool there. I don't think I have found a way to access @variables yet (I think those are called Module Instance variables). The above code has @@variables and I have to use a the module namespace AND set a reader method, and I have also used a second function inside the Class to not have to use the Module namespace prefix. Is there another more proper way? I have the feeling that I might be doing it wrong.

[Dan Rathbun]

"Programming Ruby - The Pragmatic Programmer's Guide" explains it all.