Pimcore\Model\Tool\Lock::release PHP Метод

    public static function release($key)
    {
        $instance = self::getInstance();
        $instance->getDao()->release($key);
        unset(self::$acquiredLocks[$key]);
    }

 /**
  *
  */
 public function generate()
 {
     $errorImage = PIMCORE_PATH . '/static6/img/filetype-not-supported.png';
     $deferred = false;
     $generated = false;
     if (!$this->asset) {
         $this->filesystemPath = $errorImage;
     } elseif (!$this->filesystemPath) {
         $cs = $this->asset->getCustomSetting("image_thumbnail_time");
         $im = $this->asset->getCustomSetting("image_thumbnail_asset");
         if ($im || $this->imageAsset) {
             if ($this->imageAsset) {
                 $im = $this->imageAsset;
             } else {
                 $im = Model\Asset::getById($im);
             }
             if ($im instanceof Image) {
                 $imageThumbnail = $im->getThumbnail($this->getConfig());
                 $this->filesystemPath = $imageThumbnail->getFileSystemPath();
             }
         }
         if (!$this->filesystemPath) {
             $timeOffset = $this->timeOffset;
             if (!$this->timeOffset && $cs) {
                 $timeOffset = $cs;
             }
             // fallback
             if (!$timeOffset) {
                 $timeOffset = ceil($this->asset->getDuration() / 3);
             }
             $converter = \Pimcore\Video::getInstance();
             $converter->load($this->asset->getFileSystemPath());
             $path = PIMCORE_TEMPORARY_DIRECTORY . "/video-image-cache/video_" . $this->asset->getId() . "__thumbnail_" . $timeOffset . ".png";
             if (!is_dir(dirname($path))) {
                 File::mkdir(dirname($path));
             }
             if (!is_file($path)) {
                 $lockKey = "video_image_thumbnail_" . $this->asset->getId() . "_" . $timeOffset;
                 Model\Tool\Lock::acquire($lockKey);
                 // after we got the lock, check again if the image exists in the meantime - if not - generate it
                 if (!is_file($path)) {
                     $converter->saveImage($path, $timeOffset);
                     $generated = true;
                 }
                 Model\Tool\Lock::release($lockKey);
             }
             if ($this->getConfig()) {
                 $this->getConfig()->setFilenameSuffix("time-" . $timeOffset);
                 try {
                     $path = Image\Thumbnail\Processor::process($this->asset, $this->getConfig(), $path, $deferred, true, $generated);
                 } catch (\Exception $e) {
                     Logger::error("Couldn't create image-thumbnail of video " . $this->asset->getRealFullPath());
                     Logger::error($e);
                     $path = $errorImage;
                 }
             }
             $this->filesystemPath = $path;
         }
         \Pimcore::getEventManager()->trigger("asset.video.image-thumbnail", $this, ["deferred" => $deferred, "generated" => $generated]);
     }
 }