gistfile1.rb

# This is what I wanted to do...

class MyObject < SomeSuperClass
    include SomeWebService::DataSource
    
    data_source_id '123456' # data_source_id() is a class method added by the module
    
    def initialize(name)
        @name = name
    end
    
    def name
        data_source[:prefix] + @name # data_source() is an instance method added by the module
    end
    
    def some_other_attr
        { :some => data_source[:some], :other => 'other', :attr => 'attribute' }
    end
    
    # ...
end


# This is how I think I should implement it...

module SomeWebService
    module DataSource
        module ClassMethod
            def data_source_id(id)
                @@id = id # Store the key somewhere... but how? instance var? class var? ...?
            end
            
            def get_data
                @@data ||= SomeWebService::Request.request_data(@@id) # Again, how to cache this and how to access the id?
            end
        end
        
        def self.included(base)
            base.extend(ClassMethod)
        end
        
        def data_source
            get_data # How to call the class method from here?
        end
    end
end