$cache =& JFactory::getCache( $module->module );



$cache->setLifeTime( $mod_params->get( 'cache_time', $conf->getValue( 'config.cachetime' ) ) );

$cache->setCacheValidation(true);



$contents =  $cache->get( array('JModuleHelper', 'renderModule'), array( $module, $params ), $module->id. $user->get('aid', 0) );