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cb53dc61b0
Implemented Validation::extension(); and Vaidation::range(); Updated copyright notices in all files" git-svn-id: https://svn.cakephp.org/repo/branches/1.2.x.x@6296 3807eeeb-6ff5-0310-8944-8be069107fe0
156 lines
No EOL
4 KiB
PHP
156 lines
No EOL
4 KiB
PHP
<?php
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/* SVN FILE: $Id$ */
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/**
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* Database Storage engine for cache
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*
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*
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* PHP versions 4 and 5
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*
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* CakePHP(tm) : Rapid Development Framework <http://www.cakephp.org/>
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* Copyright 2005-2008, Cake Software Foundation, Inc.
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* 1785 E. Sahara Avenue, Suite 490-204
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* Las Vegas, Nevada 89104
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*
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* Licensed under The MIT License
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* Redistributions of files must retain the above copyright notice.
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*
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* @filesource
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* @copyright Copyright 2005-2008, Cake Software Foundation, Inc.
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* @link http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
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* @package cake
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* @subpackage cake.cake.libs.cache
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* @since CakePHP(tm) v 1.2.0.4933
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* @version $Revision$
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* @modifiedby $LastChangedBy$
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* @lastmodified $Date$
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License
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*/
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/**
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* Database Storage engine for cache
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*
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* @package cake
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* @subpackage cake.cake.libs.cache
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*/
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class ModelEngine extends CacheEngine {
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/**
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* settings
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* className = name of the model to use, default => Cache
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* fields = database fields that hold data and ttl, default => data, expires
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*
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* @var array
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* @access public
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*/
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var $settings = array();
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/**
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* Model instance.
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*
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* @var object
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* @access private
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*/
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var $__Model = null;
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/**
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* Model instance.
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*
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* @var object
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* @access private
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*/
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var $__fields = array();
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/**
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* Initialize the Cache Engine
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*
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* Called automatically by the cache frontend
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* To reinitialize the settings call Cache::engine('EngineName', [optional] settings = array());
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*
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* @param array $setting array of setting for the engine
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* @return boolean True if the engine has been successfully initialized, false if not
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* @access public
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*/
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function init($settings) {
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parent::init($settings);
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$defaults = array('className'=> 'CacheModel', 'fields'=> array('data', 'expires'));
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$this->settings = array_merge($this->settings, $defaults, $settings);
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$className = $this->settings['className'];
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$this->__fields = $this->settings['fields'];
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if (App::import($className)) {
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$this->__Model = ClassRegistry::init($className);
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} else {
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$this->__Model = new Model(array('name' => $className));
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}
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return true;
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}
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/**
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* Garbage collection. Permanently remove all expired and deleted data
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*
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* @access public
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*/
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function gc() {
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return $this->__Model->deleteAll(array($this->__fields[1] => '<= '.time()));
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}
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/**
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* Write data for key into cache
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*
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* @param string $key Identifier for the data
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* @param mixed $data Data to be cached
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* @param integer $duration How long to cache the data, in seconds
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* @return boolean True if the data was succesfully cached, false on failure
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* @access public
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*/
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function write($key, &$data, $duration) {
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if (isset($this->settings['serialize'])) {
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$data = serialize($data);
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}
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if (!$data) {
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return false;
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}
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$cache = array('id' => $key,
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$this->__fields[0] => $data,
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$this->__fields[1] => time() + $duration
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);
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$result = false;
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if ($this->__Model->save($cache)) {
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$result = true;
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}
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return $result;
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}
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/**
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* Read a key from the cache
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*
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* @param string $key Identifier for the data
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* @return mixed The cached data, or false if the data doesn't exist, has expired, or if there was an error fetching it
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* @access public
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*/
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function read($key) {
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$data = $this->__Model->field($this->__fields[0], array($this->__Model->primaryKey => $key, $this->__fields[1] => '> '.time()));
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if (!$data) {
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return false;
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}
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if (isset($this->settings['serialize'])) {
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return unserialize($data);
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}
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return $data;
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}
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/**
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* Delete a key from the cache
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*
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* @param string $key Identifier for the data
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* @return boolean True if the value was succesfully deleted, false if it didn't exist or couldn't be removed
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* @access public
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*/
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function delete($key) {
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return $this->__Model->del($key);
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}
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/**
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* Delete all keys from the cache
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*
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* @return boolean True if the cache was succesfully cleared, false otherwise
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* @access public
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*/
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function clear() {
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return $this->__Model->deleteAll('1=1');
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}
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}
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?>
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