From: Don French <dhf0820@...>
Date: 2010-04-26T11:15:09+09:00
Subject: Re: Semi global variables

On Apr 25, 9:16 pm, Intransition <transf...@gmail.com> wrote:
> On Apr 25, 9:00 pm, Don French <dhf0...@gmail.com> wrote:
>
> > I have an application where multiple objects are created processing
> > different sets of data based upon a configuration specified. Each
> > object uses several other objects but those objects must use the
> > configuration initially set up in the first primary object.  Each of
> > the primary objects maintain their own configuration.
>
> > How can you have variables defined in the primary object that are
> > visible to the other objects it creates?
>
> Well, we would need to know more to be sure. But one possibility is to
> pass a reference to the primary object to all subsequent objects.

That is an option but I hate to pass around that to every object.

class Driver
  def initialize
    live_data_handler = Handler.new('live')
    test_data_handler = Handler.new('test')
  end

  def handle_command
     do
       command, data = queuemanager.wait
       case command
         when 'processlive'
           live_data_handler.handle(data)
         when 'processtest'
           live_data_handler.handle(data)
       end
    until command == 'quit'
  end
end

class Handler
  def initialize(config)
   @config = getconfig(config)
   @otherconfiginfo = other
  end

  def handle(data)
    lots_of_different_objects_created(data)
  end
end


this is an example of the structure.  same handler code but config
determines what to do and how.

Don French