diff options
Diffstat (limited to 'system/libraries/Cache/Cache.php')
| -rw-r--r-- | system/libraries/Cache/Cache.php | 209 |
1 files changed, 111 insertions, 98 deletions
diff --git a/system/libraries/Cache/Cache.php b/system/libraries/Cache/Cache.php index 61e7aa761..4395cf411 100644 --- a/system/libraries/Cache/Cache.php +++ b/system/libraries/Cache/Cache.php @@ -2,66 +2,138 @@ /** * CodeIgniter * - * An open source application development framework for PHP 4.3.2 or newer + * An open source application development framework for PHP 5.2.4 or newer + * + * NOTICE OF LICENSE + * + * Licensed under the Open Software License version 3.0 + * + * This source file is subject to the Open Software License (OSL 3.0) that is + * bundled with this package in the files license.txt / license.rst. It is + * also available through the world wide web at this URL: + * http://opensource.org/licenses/OSL-3.0 + * If you did not receive a copy of the license and are unable to obtain it + * through the world wide web, please send an email to + * licensing@ellislab.com so we can send you a copy immediately. * * @package CodeIgniter - * @author ExpressionEngine Dev Team - * @copyright Copyright (c) 2006 - 2011 EllisLab, Inc. - * @license http://codeigniter.com/user_guide/license.html + * @author EllisLab Dev Team + * @copyright Copyright (c) 2006 - 2012 EllisLab, Inc. + * @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0) * @link http://codeigniter.com * @since Version 2.0 - * @filesource + * @filesource */ -// ------------------------------------------------------------------------ - /** - * CodeIgniter Caching Class + * CodeIgniter Caching Class * * @package CodeIgniter * @subpackage Libraries * @category Core - * @author ExpressionEngine Dev Team - * @link + * @author EllisLab Dev Team + * @link */ class CI_Cache extends CI_Driver_Library { - + + /** + * Valid cache drivers + * + * @var array + */ protected $valid_drivers = array( - 'cache_apc', 'cache_file', 'cache_memcached', 'cache_dummy' + 'cache_apc', + 'cache_dummy', + 'cache_file', + 'cache_memcached', + 'cache_redis', + 'cache_wincache' ); - protected $_cache_path = NULL; // Path of cache files (if file-based cache) - protected $_adapter = 'dummy'; - protected $_backup_driver; - - // ------------------------------------------------------------------------ + /** + * Path of cache files (if file-based cache) + * + * @var string + */ + protected $_cache_path = NULL; + + /** + * Reference to the driver + * + * @var mixed + */ + protected $_adapter = 'dummy'; + + /** + * Fallback driver + * + * @param string + */ + protected $_backup_driver = 'dummy'; /** * Constructor * - * @param array + * Initialize class properties based on the configuration array. + * + * @param array + * @return void */ public function __construct($config = array()) { - if ( ! empty($config)) + $default_config = array( + 'adapter', + 'memcached' + ); + + foreach ($default_config as $key) + { + if (isset($config[$key])) + { + $param = '_'.$key; + + $this->{$param} = $config[$key]; + } + } + + if (isset($config['backup'])) { - $this->_initialize($config); + if (in_array('cache_'.$config['backup'], $this->valid_drivers)) + { + $this->_backup_driver = $config['backup']; + } + } + + // If the specified adapter isn't available, check the backup. + if ( ! $this->is_supported($this->_adapter)) + { + if ( ! $this->is_supported($this->_backup_driver)) + { + // Backup isn't supported either. Default to 'Dummy' driver. + log_message('error', 'Cache adapter "'.$this->_adapter.'" and backup "'.$this->_backup_driver.'" are both unavailable. Cache is now using "Dummy" adapter.'); + $this->_adapter = 'dummy'; + } + else + { + // Backup is supported. Set it to primary. + $this->_adapter = $this->_backup_driver; + } } } // ------------------------------------------------------------------------ /** - * Get + * Get * - * Look for a value in the cache. If it exists, return the data + * Look for a value in the cache. If it exists, return the data * if not, return FALSE * - * @param string - * @return mixed value that is stored/FALSE on failure + * @param string + * @return mixed value that is stored/FALSE on failure */ public function get($id) - { + { return $this->{$this->_adapter}->get($id); } @@ -70,11 +142,10 @@ class CI_Cache extends CI_Driver_Library { /** * Cache Save * - * @param string Unique Key - * @param mixed Data to store - * @param int Length of time (in seconds) to cache the data - * - * @return boolean true on success/false on failure + * @param string Unique Key + * @param mixed Data to store + * @param int Length of time (in seconds) to cache the data + * @return bool true on success/false on failure */ public function save($id, $data, $ttl = 60) { @@ -86,8 +157,8 @@ class CI_Cache extends CI_Driver_Library { /** * Delete from Cache * - * @param mixed unique identifier of the item in the cache - * @return boolean true on success/false on failure + * @param mixed unique identifier of the item in the cache + * @return bool true on success/false on failure */ public function delete($id) { @@ -99,7 +170,7 @@ class CI_Cache extends CI_Driver_Library { /** * Clean the cache * - * @return boolean false on failure/true on success + * @return bool false on failure/true on success */ public function clean() { @@ -111,8 +182,8 @@ class CI_Cache extends CI_Driver_Library { /** * Cache Info * - * @param string user/filehits - * @return mixed array on success, false on failure + * @param string user/filehits + * @return mixed array on success, false on failure */ public function cache_info($type = 'user') { @@ -120,61 +191,25 @@ class CI_Cache extends CI_Driver_Library { } // ------------------------------------------------------------------------ - + /** * Get Cache Metadata * - * @param mixed key to get cache metadata on - * @return mixed return value from child method + * @param mixed key to get cache metadata on + * @return mixed return value from child method */ public function get_metadata($id) { return $this->{$this->_adapter}->get_metadata($id); } - - // ------------------------------------------------------------------------ - - /** - * Initialize - * - * Initialize class properties based on the configuration array. - * - * @param array - * @return void - */ - private function _initialize($config) - { - $default_config = array( - 'adapter', - 'memcached' - ); - - foreach ($default_config as $key) - { - if (isset($config[$key])) - { - $param = '_'.$key; - - $this->{$param} = $config[$key]; - } - } - - if (isset($config['backup'])) - { - if (in_array('cache_'.$config['backup'], $this->valid_drivers)) - { - $this->_backup_driver = $config['backup']; - } - } - } // ------------------------------------------------------------------------ /** * Is the requested driver supported in this environment? * - * @param string The driver to test. - * @return array + * @param string The driver to test. + * @return array */ public function is_supported($driver) { @@ -188,29 +223,7 @@ class CI_Cache extends CI_Driver_Library { return $support[$driver]; } - // ------------------------------------------------------------------------ - - /** - * __get() - * - * @param child - * @return object - */ - public function __get($child) - { - $obj = parent::__get($child); - - if ( ! $this->is_supported($child)) - { - $this->_adapter = $this->_backup_driver; - } - - return $obj; - } - - // ------------------------------------------------------------------------ } -// End Class /* End of file Cache.php */ /* Location: ./system/libraries/Cache/Cache.php */
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