diff options
Diffstat (limited to 'system/libraries/Cache/drivers/Cache_apcu.php')
| -rw-r--r-- | system/libraries/Cache/drivers/Cache_apcu.php | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/system/libraries/Cache/drivers/Cache_apcu.php b/system/libraries/Cache/drivers/Cache_apcu.php new file mode 100644 index 000000000..9b7fe877c --- /dev/null +++ b/system/libraries/Cache/drivers/Cache_apcu.php @@ -0,0 +1,219 @@ +<?php +/** + * CodeIgniter + * + * An open source application development framework for PHP + * + * This content is released under the MIT License (MIT) + * + * Copyright (c) 2014 - 2017, British Columbia Institute of Technology + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + * @package CodeIgniter + * @author EllisLab Dev Team + * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/) + * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/) + * @license http://opensource.org/licenses/MIT MIT License + * @link https://codeigniter.com + * @since Version 3.2.0 + * @filesource + */ +defined('BASEPATH') OR exit('No direct script access allowed'); + +/** + * CodeIgniter APCu Caching Class + * + * @package CodeIgniter + * @subpackage Libraries + * @category Core + * @author CodeIgniter Dev team + */ +class CI_Cache_apcu extends CI_Driver { + + /** + * Class constructor + * + * Only present so that an error message is logged + * if APCu is not available. + * + * @return void + */ + public function __construct() + { + if ( ! $this->is_supported()) + { + log_message('error', 'Cache: Failed to initialize APCu; extension not loaded/enabled?'); + } + } + + // ------------------------------------------------------------------------ + + /** + * Get + * + * Look for a value in the cache. If it exists, return the data + * if not, return FALSE + * + * @param string + * @return mixed value that is stored/FALSE on failure + */ + public function get($id) + { + $success = FALSE; + $data = apcu_fetch($id, $success); + + if ($success === TRUE) + { + return is_array($data) + ? $data[0] + : $data; + } + + return FALSE; + } + + // ------------------------------------------------------------------------ + + /** + * Cache Save + * + * @param string $id Cache ID + * @param mixed $data Data to store + * @param int $ttl Length of time (in seconds) to cache the data + * @param bool $raw Whether to store the raw value + * @return bool TRUE on success, FALSE on failure + */ + public function save($id, $data, $ttl = 60, $raw = FALSE) + { + $ttl = (int) $ttl; + + return apcu_store( + $id, + ($raw === TRUE ? $data : array($data, time(), $ttl)), + $ttl + ); + } + + // ------------------------------------------------------------------------ + + /** + * Delete from Cache + * + * @param mixed unique identifier of the item in the cache + * @return bool true on success/false on failure + */ + public function delete($id) + { + return apcu_delete($id); + } + + // ------------------------------------------------------------------------ + + /** + * Increment a raw value + * + * @param string $id Cache ID + * @param int $offset Step/value to add + * @return mixed New value on success or FALSE on failure + */ + public function increment($id, $offset = 1) + { + return apcu_inc($id, $offset); + } + + // ------------------------------------------------------------------------ + + /** + * Decrement a raw value + * + * @param string $id Cache ID + * @param int $offset Step/value to reduce by + * @return mixed New value on success or FALSE on failure + */ + public function decrement($id, $offset = 1) + { + return apcu_dec($id, $offset); + } + + // ------------------------------------------------------------------------ + + /** + * Clean the cache + * + * @return bool false on failure/true on success + */ + public function clean() + { + return apcu_clear_cache(); + } + + // ------------------------------------------------------------------------ + + /** + * Cache Info + * + * @return mixed array on success, false on failure + */ + public function cache_info() + { + return apcu_cache_info(); + } + + // ------------------------------------------------------------------------ + + /** + * Get Cache Metadata + * + * @param mixed key to get cache metadata on + * @return mixed array on success/false on failure + */ + public function get_metadata($id) + { + $success = FALSE; + $stored = apcu_fetch($id, $success); + + if ($success === FALSE OR count($stored) !== 3) + { + return FALSE; + } + + list($data, $time, $ttl) = $stored; + + return array( + 'expire' => $time + $ttl, + 'mtime' => $time, + 'data' => $data + ); + } + + // ------------------------------------------------------------------------ + + /** + * is_supported() + * + * Check to see if APCu is available on this system, bail if it isn't. + * + * @return bool + */ + public function is_supported() + { + return (extension_loaded('apcu') && ini_get('apc.enabled')); + } +}
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