Merge pull request #1247 from nextcloud/storage-id-global-cache
more efficient querying of numeric storage idspull/1250/head
Morris Jobke
GitHub
commit
5ac26d12f0
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<?php
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/**
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* @copyright Robin Appelman <robin@icewind.nl>
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*
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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\Mount\IMountPoint;
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use OCP\IDBConnection;
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/**
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* Handle the mapping between the string and numeric storage ids
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*
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* Each storage has 2 different ids
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* a string id which is generated by the storage backend and reflects the configuration of the storage (e.g. 'smb://user@host/share')
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* and a numeric storage id which is referenced in the file cache
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*
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* A mapping between the two storage ids is stored in the database and accessible trough this class
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*
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* @package OC\Files\Cache
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*/
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class StorageGlobal {
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/** @var IDBConnection */
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private $connection;
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/** @var array[] */
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private $cache = [];
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public function __construct(IDBConnection $connection) {
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$this->connection = $connection;
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}
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/**
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* @param string[] $storageIds
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*/
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public function loadForStorageIds(array $storageIds) {
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$builder = $this->connection->getQueryBuilder();
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$query = $builder->select(['id', 'numeric_id', 'available', 'last_checked'])
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->from('storages')
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->where($builder->expr()->in('id', $builder->createNamedParameter(array_values($storageIds), IQueryBuilder::PARAM_STR_ARRAY)));
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$result = $query->execute();
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while ($row = $result->fetch()) {
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$this->cache[$row['id']] = $row;
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}
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}
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/**
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* @param string $storageId
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* @return array|null
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*/
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public function getStorageInfo($storageId) {
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if (!isset($this->cache[$storageId])) {
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$this->loadForStorageIds([$storageId]);
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}
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return isset($this->cache[$storageId]) ? $this->cache[$storageId] : null;
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}
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public function clearCache() {
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$this->cache = [];
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}
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}
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