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Message: [QUOTE="Michael, post: 4481778"] I'm playing around with a ruby app using XML-RPC. Currently I'm using global variables so I can create multiple objects without having to log in for each and every object. class Base def initialize(user, pass) $user, $pass = user, pass end def login() $client = XMLRPC::Client.new(...) $sessionid = $client.call("xmlrpc.method", $user, $pass) return $sessionid end end Derived classes look like this: class Object1 < Base def initialize() if not $sessionid then self.login end end end This way I can log in once with the first object created without having to log in each time. However, this seems inelegant to me. Is there a more elegant, or just more rubyish, way of doing this? Also, I'd have potential problems if I wanted to log on as multiple users. Would it make more sense just to pass around an instance of the Base object: class Object2 def initialize(xmlrpc_client) if not xmlrpc_client.sessionid then xmlrpc_client.login end def call_xmlrpc_method(method, params) results = xmlrpc_client.call(method, params) return results end end xmlrpc_client = Base.new o2 = Object2.new(xmlrpc_client) Pro: no global variables. Con: coupling between Object2 and Base classes. --Michael [/QUOTE]