/**
* This method is use for check if you must launch the job
*
* @access public
* @static
*/
public static function exec()
{
$cache_file = Config::getCacheFolder() . '/' . Config::getCacheFilename();
if (file_exists($cache_file) === false) {
self::launch();
} else {
$cache_mtime = filemtime($cache_file);
$cache_regenerate = time() - Config::getCacheTime() * 60;
if ($cache_mtime < $cache_regenerate) {
self::launch();
}
}
}
/**
* This function initialize, if neccesary, the filename with the configuration
*
* @access protected
* @static
*/
protected static function init()
{
if (self::$filename === null) {
self::$filename = Config::getCacheFolder() . '/' . Config::getCacheFilename();
}
}
/**
* Get the cache and return the Strip object cached
*
* @param string $file The filename of the strip (only the filename and not the path)
* @access public
* @static
* @throws Exception If the cache doesn't exist, an exception is throwed
* @return Strip The Strip object related with the cache
*/
public static function getCache($file)
{
$strip_tmp = new Strip($file);
$cache_file = Config::getCacheFolder() . '/' . $strip_tmp->getFilename() . '.php';
if (file_exists($cache_file) === false) {
throw new Exception('The cache for "' . $file . '" doesn\'t exist!');
}
$strip = file_get_contents($cache_file);
return unserialize($strip);
}
