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+<?php
+/**
+ * @author Morris Jobke <hey@morrisjobke.de>
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ * @author Thomas Tanghus <thomas@tanghus.net>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+/**
+ * Public interface of ownCloud for apps to use.
+ * Cache interface
+ *
+ */
+
+// use OCP namespace for all classes that are considered public.
+// This means that they should be used by apps instead of the internal ownCloud classes
+namespace OCP;
+
+/**
+ * This interface defines method for accessing the file based user cache.
+ * @since 6.0.0
+ */
+interface ICache {
+
+ /**
+ * Get a value from the user cache
+ * @param string $key
+ * @return mixed
+ * @since 6.0.0
+ */
+ public function get($key);
+
+ /**
+ * Set a value in the user cache
+ * @param string $key
+ * @param mixed $value
+ * @param int $ttl Time To Live in seconds. Defaults to 60*60*24
+ * @return bool
+ * @since 6.0.0
+ */
+ public function set($key, $value, $ttl = 0);
+
+ /**
+ * Check if a value is set in the user cache
+ * @param string $key
+ * @return bool
+ * @since 6.0.0
+ * @deprecated 9.1.0 Directly read from GET to prevent race conditions
+ */
+ public function hasKey($key);
+
+ /**
+ * Remove an item from the user cache
+ * @param string $key
+ * @return bool
+ * @since 6.0.0
+ */
+ public function remove($key);
+
+ /**
+ * Clear the user cache of all entries starting with a prefix
+ * @param string $prefix (optional)
+ * @return bool
+ * @since 6.0.0
+ */
+ public function clear($prefix = '');
+}