SetTransactionIsolationLevel.php 1.8 KB

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  1. <?php
  2. declare(strict_types=1);
  3. /**
  4. * @copyright Copyright (c) 2019 Daniel Kesselberg <mail@danielkesselberg.de>
  5. *
  6. * @author Daniel Kesselberg <mail@danielkesselberg.de>
  7. *
  8. * @license GNU AGPL version 3 or any later version
  9. *
  10. * This program is free software: you can redistribute it and/or modify
  11. * it under the terms of the GNU Affero General Public License as
  12. * published by the Free Software Foundation, either version 3 of the
  13. * License, or (at your option) any later version.
  14. *
  15. * This program is distributed in the hope that it will be useful,
  16. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18. * GNU Affero General Public License for more details.
  19. *
  20. * You should have received a copy of the GNU Affero General Public License
  21. * along with this program. If not, see <http://www.gnu.org/licenses/>.
  22. *
  23. */
  24. namespace OC\DB;
  25. use Doctrine\Common\EventSubscriber;
  26. use Doctrine\DBAL\Connections\PrimaryReadReplicaConnection;
  27. use Doctrine\DBAL\Event\ConnectionEventArgs;
  28. use Doctrine\DBAL\Events;
  29. use Doctrine\DBAL\Platforms\MySQLPlatform;
  30. use Doctrine\DBAL\TransactionIsolationLevel;
  31. class SetTransactionIsolationLevel implements EventSubscriber {
  32. /**
  33. * @param ConnectionEventArgs $args
  34. * @return void
  35. */
  36. public function postConnect(ConnectionEventArgs $args) {
  37. $connection = $args->getConnection();
  38. if ($connection instanceof PrimaryReadReplicaConnection && $connection->isConnectedToPrimary()) {
  39. $connection->setTransactionIsolation(TransactionIsolationLevel::READ_COMMITTED);
  40. if ($connection->getDatabasePlatform() instanceof MySQLPlatform) {
  41. $connection->executeStatement('SET SESSION AUTOCOMMIT=1');
  42. }
  43. }
  44. }
  45. public function getSubscribedEvents() {
  46. return [Events::postConnect];
  47. }
  48. }