Merge pull request #18227 from nextcloud/bug/17947/set-transaction-isolation-connect

Add event subscriber for transaction isolation level

1 files changed, 46 insertions, 0 deletions

diff --git a/lib/private/DB/SetTransactionIsolationLevel.php b/lib/private/DB/SetTransactionIsolationLevel.php
new file mode 100644
index 00000000000..0a65cbbf463
--- /dev/null
+++ b/lib/private/DB/SetTransactionIsolationLevel.php
@@ -0,0 +1,46 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2019 Daniel Kesselberg <mail@danielkesselberg.de>
+ *
+ * @author Daniel Kesselberg <mail@danielkesselberg.de>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OC\DB;
+
+use Doctrine\Common\EventSubscriber;
+use Doctrine\DBAL\Event\ConnectionEventArgs;
+use Doctrine\DBAL\Events;
+use Doctrine\DBAL\TransactionIsolationLevel;
+
+class SetTransactionIsolationLevel implements EventSubscriber {
+	/**
+	 * @param ConnectionEventArgs $args
+	 * @return void
+	 */
+	public function postConnect(ConnectionEventArgs $args) {
+		$args->getConnection()->setTransactionIsolation(TransactionIsolationLevel::READ_COMMITTED);
+	}
+
+	public function getSubscribedEvents() {
+		return [Events::postConnect];
+	}
+}