code: def retrieveVals(self):
          
          lighttpdInfo = LighttpdInfo(self._host, self._port,
                                  self._user, self._password, 
                                  self._statuspath, self._ssl)
          stats = lighttpdInfo.getServerStats()
          if self.hasGraph('lighttpd_access'):
              self.setGraphVal('lighttpd_access', 'reqs', stats['Total Accesses'])
          if self.hasGraph('lighttpd_bytes'):
              self.setGraphVal('lighttpd_bytes', 'bytes', 
                               stats['Total kBytes'] * 1000)
          if self.hasGraph('lighttpd_servers'):
              self.setGraphVal('lighttpd_servers', 'busy', stats['BusyServers'])
              self.setGraphVal('lighttpd_servers', 'idle', stats['IdleServers'])
              self.setGraphVal('lighttpd_servers', 'max', stats['MaxServers'])
docs: Retrieve values for graphs.