# File lib/rankmirror/cache.rb, line 35
                def is_recent?
                        if File.exist?(@filename + ".xml")
                                last_time = File.mtime(@filename + ".xml")
                                # one week
                                if Time.now - last_time < 60*60*24*7
                                        true
                                else
                                        false
                                end
                        else
                                false
                        end
                end