/** * scan all the files and folders in a folder * * @param string $path * @param bool $recursive * @param int $reuse * @param array $folderData existing cache data for the folder to be scanned * @param bool $lock set to false to disable getting an additional read lock during scanning * @return int the size of the scanned folder or -1 if the size is unknown at this stage */ protected function scanChildren($path, $recursive = self::SCAN_RECURSIVE, $reuse = -1, $folderData = null, $lock = true) { if ($reuse === -1) { $reuse = $recursive === self::SCAN_SHALLOW ? self::REUSE_ETAG | self::REUSE_SIZE : self::REUSE_ETAG; } $this->emit('\\OC\\Files\\Cache\\Scanner', 'scanFolder', array($path, $this->storageId)); $size = 0; $childQueue = array(); if (is_array($folderData) and isset($folderData['fileid'])) { $folderId = $folderData['fileid']; } else { $folderId = $this->cache->getId($path); } $existingChildren = $this->getExistingChildren($folderId); $newChildren = $this->getNewChildren($path); if ($this->useTransactions) { \OC_DB::beginTransaction(); } $exceptionOccurred = false; foreach ($newChildren as $file) { $child = $path ? $path . '/' . $file : $file; try { $existingData = isset($existingChildren[$file]) ? $existingChildren[$file] : null; $data = $this->scanFile($child, $reuse, $folderId, $existingData, $lock); if ($data) { if ($data['mimetype'] === 'httpd/unix-directory' and $recursive === self::SCAN_RECURSIVE) { $childQueue[$child] = $data; } else { if ($data['size'] === -1) { $size = -1; } else { if ($size !== -1) { $size += $data['size']; } } } } } catch (\Doctrine\DBAL\DBALException $ex) { // might happen if inserting duplicate while a scanning // process is running in parallel // log and ignore \OCP\Util::writeLog('core', 'Exception while scanning file "' . $child . '": ' . $ex->getMessage(), \OCP\Util::DEBUG); $exceptionOccurred = true; } catch (\OCP\Lock\LockedException $e) { if ($this->useTransactions) { \OC_DB::rollback(); } throw $e; } } $removedChildren = \array_diff(array_keys($existingChildren), $newChildren); foreach ($removedChildren as $childName) { $child = $path ? $path . '/' . $childName : $childName; $this->removeFromCache($child); } if ($this->useTransactions) { \OC_DB::commit(); } if ($exceptionOccurred) { // It might happen that the parallel scan process has already // inserted mimetypes but those weren't available yet inside the transaction // To make sure to have the updated mime types in such cases, // we reload them here \OC::$server->getMimeTypeLoader()->reset(); } foreach ($childQueue as $child => $childData) { $childSize = $this->scanChildren($child, self::SCAN_RECURSIVE, $reuse, $childData, $lock); if ($childSize === -1) { $size = -1; } else { if ($size !== -1) { $size += $childSize; } } } if (!is_array($folderData) or !isset($folderData['size']) or $folderData['size'] !== $size) { $this->updateCache($path, array('size' => $size), $folderId); } $this->emit('\\OC\\Files\\Cache\\Scanner', 'postScanFolder', array($path, $this->storageId)); return $size; }
/** * Rollback the database changes done during a transaction that is in progress */ public static function rollback() { \OC_DB::rollback(); }