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<?php |
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/** |
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* @author Robin Appelman <[email protected]> |
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* |
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* @copyright Copyright (c) 2018, ownCloud GmbH |
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* @license AGPL-3.0 |
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* |
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* This code is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Affero General Public License, version 3, |
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* as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Affero General Public License for more details. |
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* |
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* You should have received a copy of the GNU Affero General Public License, version 3, |
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* along with this program. If not, see <http://www.gnu.org/licenses/> |
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* |
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*/ |
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namespace OC\Files\Cache; |
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use OCP\DB\QueryBuilder\IQueryBuilder; |
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use OCP\Files\Cache\IPropagator; |
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use OCP\IDBConnection; |
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/** |
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* Propagate etags and mtimes within the storage |
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*/ |
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class Propagator implements IPropagator { |
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private $inBatch = false; |
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private $batch = []; |
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/** |
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* @var \OC\Files\Storage\Storage |
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*/ |
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protected $storage; |
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/** |
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* @var IDBConnection |
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*/ |
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private $connection; |
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/** |
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* @param \OC\Files\Storage\Storage $storage |
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* @param IDBConnection $connection |
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*/ |
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public function __construct(\OC\Files\Storage\Storage $storage, IDBConnection $connection) { |
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$this->storage = $storage; |
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$this->connection = $connection; |
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} |
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/** |
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* @param string $internalPath |
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* @param int $time |
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* @param int $sizeDifference number of bytes the file has grown |
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*/ |
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public function propagateChange($internalPath, $time, $sizeDifference = 0) { |
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$storageId = (int)$this->storage->getStorageCache()->getNumericId(); |
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$parents = $this->getParents($internalPath); |
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if (\count($parents) === 0) { |
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return; |
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} |
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if ($this->inBatch) { |
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foreach ($parents as $parent) { |
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$this->addToBatch($parent, $time, $sizeDifference); |
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} |
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return; |
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} |
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$parentHashes = \array_map('md5', $parents); |
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$etag = \uniqid(); // since we give all folders the same etag we don't ask the storage for the etag |
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$builder = $this->connection->getQueryBuilder(); |
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$hashParams = \array_map(function ($hash) use ($builder) { |
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return $builder->expr()->literal($hash); |
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}, $parentHashes); |
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$builder->update('filecache') |
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->set('mtime', $builder->createFunction('GREATEST(`mtime`, ' . $builder->createNamedParameter($time, IQueryBuilder::PARAM_INT) . ')')) |
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->set('etag', $builder->createNamedParameter($etag, IQueryBuilder::PARAM_STR)) |
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->where($builder->expr()->eq('storage', $builder->createNamedParameter($storageId, IQueryBuilder::PARAM_INT))) |
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->andWhere($builder->expr()->in('path_hash', $hashParams)); |
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$builder->execute(); |
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if ($sizeDifference !== 0) { |
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// we need to do size separably so we can ignore entries with uncalculated size |
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$builder = $this->connection->getQueryBuilder(); |
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$builder->update('filecache') |
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->set('size', $builder->createFunction('`size` + ' . $builder->createNamedParameter($sizeDifference))) |
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->where($builder->expr()->eq('storage', $builder->createNamedParameter($storageId, IQueryBuilder::PARAM_INT))) |
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->andWhere($builder->expr()->in('path_hash', $hashParams)) |
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->andWhere($builder->expr()->gt('size', $builder->expr()->literal(-1, IQueryBuilder::PARAM_INT))); |
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$builder->execute(); |
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} |
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} |
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protected function getParents($path) { |
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if ($path === '') { |
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return []; |
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} |
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$parts = \explode('/', $path); |
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$parent = ''; |
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$parents = []; |
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foreach ($parts as $part) { |
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$parents[] = $parent; |
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$parent = \trim($parent . '/' . $part, '/'); |
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} |
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return $parents; |
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} |
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/** |
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* Mark the beginning of a propagation batch |
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* |
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* Note that not all cache setups support propagation in which case this will be a noop |
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* |
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* Batching for cache setups that do support it has to be explicit since the cache state is not fully consistent |
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* before the batch is committed. |
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*/ |
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public function beginBatch() { |
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$this->inBatch = true; |
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} |
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private function addToBatch($internalPath, $time, $sizeDifference) { |
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if (!isset($this->batch[$internalPath])) { |
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$this->batch[$internalPath] = [ |
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'hash' => \md5($internalPath), |
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'time' => $time, |
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'size' => $sizeDifference |
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]; |
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} else { |
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$this->batch[$internalPath]['size'] += $sizeDifference; |
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if ($time > $this->batch[$internalPath]['time']) { |
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$this->batch[$internalPath]['time'] = $time; |
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} |
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} |
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} |
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/** |
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* Commit the active propagation batch |
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*/ |
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public function commitBatch() { |
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if (!$this->inBatch) { |
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throw new \BadMethodCallException('Not in batch'); |
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} |
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$this->inBatch = false; |
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$this->connection->beginTransaction(); |
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$query = $this->connection->getQueryBuilder(); |
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$storageId = (int)$this->storage->getStorageCache()->getNumericId(); |
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$query->update('filecache') |
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->set('mtime', $query->createFunction('GREATEST(`mtime`, ' . $query->createParameter('time') . ')')) |
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->set('etag', $query->expr()->literal(\uniqid())) |
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->where($query->expr()->eq('storage', $query->expr()->literal($storageId, IQueryBuilder::PARAM_INT))) |
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->andWhere($query->expr()->eq('path_hash', $query->createParameter('hash'))); |
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$sizeQuery = $this->connection->getQueryBuilder(); |
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$sizeQuery->update('filecache') |
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->set('size', $sizeQuery->createFunction('`size` + ' . $sizeQuery->createParameter('size'))) |
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->where($query->expr()->eq('storage', $query->expr()->literal($storageId, IQueryBuilder::PARAM_INT))) |
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->andWhere($query->expr()->eq('path_hash', $query->createParameter('hash'))) |
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->andWhere($sizeQuery->expr()->gt('size', $sizeQuery->expr()->literal(-1, IQueryBuilder::PARAM_INT))); |
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foreach ($this->batch as $item) { |
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$query->setParameter('time', $item['time'], IQueryBuilder::PARAM_INT); |
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$query->setParameter('hash', $item['hash']); |
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$query->execute(); |
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if ($item['size']) { |
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$sizeQuery->setParameter('size', $item['size'], IQueryBuilder::PARAM_INT); |
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$sizeQuery->setParameter('hash', $item['hash']); |
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$sizeQuery->execute(); |
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} |
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} |
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$this->batch = []; |
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$this->connection->commit(); |
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} |
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} |
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owncloud /
core
