server_thing.rb

class ServerThing
  def initialize session
    @session = session # primary parameters
  end
  
  def for type, session
    self.class.const_get("#{type.to_s.capitalize}Class").new_with self, ServerThing::Session.new(session)
  end
  
  class SuperClassForObjects
    def self.new_with server, session
      @server  = server
      @session = session
    end
  end
  
  class NameClass < SuperClassForObjects
  end
  
  class TimeClass < SuperClassForObjects
  end
  
  class Session < Hash # or whatever
    def initialize parameters
      self.replace parameters
    end
  end
end

params = {stuff: 0}
session_params1 = {session_stuff: 1}
session_params2 = {session_stuff: 2}

server     = ServerThing.new params
name_thing = server.for :name, session_params1
time_thing = server.for :time, session_params2