diff options
Diffstat (limited to 'system/libraries/Cache/drivers/Cache_memcached.php')
| -rw-r--r-- | system/libraries/Cache/drivers/Cache_memcached.php | 277 |
1 files changed, 183 insertions, 94 deletions
diff --git a/system/libraries/Cache/drivers/Cache_memcached.php b/system/libraries/Cache/drivers/Cache_memcached.php index f9d578b93..b642a2c03 100644 --- a/system/libraries/Cache/drivers/Cache_memcached.php +++ b/system/libraries/Cache/drivers/Cache_memcached.php @@ -1,19 +1,41 @@ -<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); +<?php /** * CodeIgniter * - * An open source application development framework for PHP 5.1.6 or newer + * An open source application development framework for PHP * - * @package CodeIgniter - * @author ExpressionEngine Dev Team - * @copyright Copyright (c) 2006 - 2014 EllisLab, Inc. - * @license http://codeigniter.com/user_guide/license.html - * @link http://codeigniter.com - * @since Version 2.0 + * 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 2.0 * @filesource */ - -// ------------------------------------------------------------------------ +defined('BASEPATH') OR exit('No direct script access allowed'); /** * CodeIgniter Memcached Caching Class @@ -21,35 +43,105 @@ * @package CodeIgniter * @subpackage Libraries * @category Core - * @author ExpressionEngine Dev Team + * @author EllisLab Dev Team * @link */ - class CI_Cache_memcached extends CI_Driver { - private $_memcached; // Holds the memcached object + /** + * Holds the memcached object + * + * @var object + */ + protected $_memcached; + + /** + * Memcached configuration + * + * @var array + */ + protected $_config = array( + 'default' => array( + 'host' => '127.0.0.1', + 'port' => 11211, + 'weight' => 1 + ) + ); + + // ------------------------------------------------------------------------ - protected $_memcache_conf = array( - 'default' => array( - 'default_host' => '127.0.0.1', - 'default_port' => 11211, - 'default_weight' => 1 - ) + /** + * Class constructor + * + * Setup Memcache(d) + * + * @return void + */ + public function __construct() + { + // Try to load memcached server info from the config file. + $CI =& get_instance(); + $defaults = $this->_config['default']; + + if ($CI->config->load('memcached', TRUE, TRUE)) + { + $this->_config = $CI->config->config['memcached']; + } + + if (class_exists('Memcached', FALSE)) + { + $this->_memcached = new Memcached(); + } + elseif (class_exists('Memcache', FALSE)) + { + $this->_memcached = new Memcache(); + } + else + { + log_message('error', 'Cache: Failed to create Memcache(d) object; extension not loaded?'); + return; + } + + foreach ($this->_config as $cache_server) + { + isset($cache_server['hostname']) OR $cache_server['hostname'] = $defaults['host']; + isset($cache_server['port']) OR $cache_server['port'] = $defaults['port']; + isset($cache_server['weight']) OR $cache_server['weight'] = $defaults['weight']; + + if ($this->_memcached instanceof Memcache) + { + // Third parameter is persistence and defaults to TRUE. + $this->_memcached->addServer( + $cache_server['hostname'], + $cache_server['port'], + TRUE, + $cache_server['weight'] ); + } + elseif ($this->_memcached instanceof Memcached) + { + $this->_memcached->addServer( + $cache_server['hostname'], + $cache_server['port'], + $cache_server['weight'] + ); + } + } + } // ------------------------------------------------------------------------ /** * Fetch from cache * - * @param mixed unique key id - * @return mixed data on success/false on failure + * @param string $id Cache ID + * @return mixed Data on success, FALSE on failure */ public function get($id) { $data = $this->_memcached->get($id); - return (is_array($data)) ? $data[0] : FALSE; + return is_array($data) ? $data[0] : $data; } // ------------------------------------------------------------------------ @@ -57,20 +149,26 @@ class CI_Cache_memcached extends CI_Driver { /** * Save * - * @param string unique identifier - * @param mixed data being cached - * @param int time to live - * @return boolean true on success, false on failure + * @param string $id Cache ID + * @param mixed $data Data being cached + * @param int $ttl Time to live + * @param bool $raw Whether to store the raw value + * @return bool TRUE on success, FALSE on failure */ - public function save($id, $data, $ttl = 60) + public function save($id, $data, $ttl = 60, $raw = FALSE) { - if (get_class($this->_memcached) == 'Memcached') + if ($raw !== TRUE) { - return $this->_memcached->set($id, array($data, time(), $ttl), $ttl); + $data = array($data, time(), $ttl); } - else if (get_class($this->_memcached) == 'Memcache') + + if ($this->_memcached instanceof Memcached) + { + return $this->_memcached->set($id, $data, $ttl); + } + elseif ($this->_memcached instanceof Memcache) { - return $this->_memcached->set($id, array($data, time(), $ttl), 0, $ttl); + return $this->_memcached->set($id, $data, 0, $ttl); } return FALSE; @@ -81,8 +179,8 @@ class CI_Cache_memcached extends CI_Driver { /** * Delete from Cache * - * @param mixed key to be deleted. - * @return boolean true on success, false on failure + * @param mixed $id key to be deleted. + * @return bool true on success, false on failure */ public function delete($id) { @@ -92,9 +190,37 @@ class CI_Cache_memcached extends CI_Driver { // ------------------------------------------------------------------------ /** + * 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 $this->_memcached->increment($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 $this->_memcached->decrement($id, $offset); + } + + // ------------------------------------------------------------------------ + + /** * Clean the Cache * - * @return boolean false on failure/true on success + * @return bool false on failure/true on success */ public function clean() { @@ -106,10 +232,9 @@ class CI_Cache_memcached extends CI_Driver { /** * Cache Info * - * @param null type not supported in memcached - * @return mixed array on success, false on failure + * @return mixed array on success, false on failure */ - public function cache_info($type = NULL) + public function cache_info() { return $this->_memcached->getStats(); } @@ -119,8 +244,8 @@ class CI_Cache_memcached extends CI_Driver { /** * Get Cache Metadata * - * @param mixed key to get cache metadata on - * @return mixed FALSE on failure, array on success. + * @param mixed $id key to get cache metadata on + * @return mixed FALSE on failure, array on success. */ public function get_metadata($id) { @@ -143,72 +268,36 @@ class CI_Cache_memcached extends CI_Driver { // ------------------------------------------------------------------------ /** - * Setup memcached. + * Is supported + * + * Returns FALSE if memcached is not supported on the system. + * If it is, we setup the memcached object & return TRUE + * + * @return bool */ - private function _setup_memcached() + public function is_supported() { - // Try to load memcached server info from the config file. - $CI =& get_instance(); - if ($CI->config->load('memcached', TRUE, TRUE)) - { - if (is_array($CI->config->config['memcached'])) - { - $this->_memcache_conf = NULL; - - foreach ($CI->config->config['memcached'] as $name => $conf) - { - $this->_memcache_conf[$name] = $conf; - } - } - } - - $this->_memcached = new Memcached(); - - foreach ($this->_memcache_conf as $name => $cache_server) - { - if ( ! array_key_exists('hostname', $cache_server)) - { - $cache_server['hostname'] = $this->_default_options['default_host']; - } - - if ( ! array_key_exists('port', $cache_server)) - { - $cache_server['port'] = $this->_default_options['default_port']; - } - - if ( ! array_key_exists('weight', $cache_server)) - { - $cache_server['weight'] = $this->_default_options['default_weight']; - } - - $this->_memcached->addServer( - $cache_server['hostname'], $cache_server['port'], $cache_server['weight'] - ); - } + return (extension_loaded('memcached') OR extension_loaded('memcache')); } // ------------------------------------------------------------------------ - /** - * Is supported + * Class destructor * - * Returns FALSE if memcached is not supported on the system. - * If it is, we setup the memcached object & return TRUE + * Closes the connection to Memcache(d) if present. + * + * @return void */ - public function is_supported() + public function __destruct() { - if ( ! extension_loaded('memcached')) + if ($this->_memcached instanceof Memcache) { - log_message('error', 'The Memcached Extension must be loaded to use Memcached Cache.'); - return FALSE; + $this->_memcached->close(); + } + elseif ($this->_memcached instanceof Memcached && method_exists($this->_memcached, 'quit')) + { + $this->_memcached->quit(); } - - $this->_setup_memcached(); - return TRUE; } - } - -/* End of file Cache_memcached.php */ -/* Location: ./system/libraries/Cache/drivers/Cache_memcached.php */
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