1: <?php
 2: /* SVN FILE: $Id$ */
 3: /**
 4:  * APC storage engine for cache.
 5:  *
 6:  *
 7:  * PHP versions 4 and 5
 8:  *
 9:  * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
10:  * Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
11:  *
12:  * Licensed under The MIT License
13:  * Redistributions of files must retain the above copyright notice.
14:  *
15:  * @copyright     Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
16:  * @link          http://cakephp.org CakePHP(tm) Project
17:  * @package       cake
18:  * @subpackage    cake.cake.libs.cache
19:  * @since         CakePHP(tm) v 1.2.0.4933
20:  * @version       $Revision$
21:  * @modifiedby    $LastChangedBy$
22:  * @lastmodified  $Date$
23:  * @license       http://www.opensource.org/licenses/mit-license.php The MIT License
24:  */
25: /**
26:  * APC storage engine for cache
27:  *
28:  * @package       cake
29:  * @subpackage    cake.cake.libs.cache
30:  */
31: class ApcEngine extends CacheEngine {
32: /**
33:  * Initialize the Cache Engine
34:  *
35:  * Called automatically by the cache frontend
36:  * To reinitialize the settings call Cache::engine('EngineName', [optional] settings = array());
37:  *
38:  * @param array $setting array of setting for the engine
39:  * @return boolean True if the engine has been successfully initialized, false if not
40:  * @see CacheEngine::__defaults
41:  * @access public
42:  */
43:     function init($settings = array()) {
44:         parent::init(array_merge(array('engine' => 'Apc', 'prefix' => Inflector::slug(APP_DIR) . '_'), $settings));
45:         return function_exists('apc_cache_info');
46:     }
47: /**
48:  * Write data for key into cache
49:  *
50:  * @param string $key Identifier for the data
51:  * @param mixed $value Data to be cached
52:  * @param integer $duration How long to cache the data, in seconds
53:  * @return boolean True if the data was succesfully cached, false on failure
54:  * @access public
55:  */
56:     function write($key, &$value, $duration) {
57:         $expires = time() + $duration;
58:         apc_store($key.'_expires', $expires, $duration);
59:         return apc_store($key, $value, $duration);
60:     }
61: /**
62:  * Read a key from the cache
63:  *
64:  * @param string $key Identifier for the data
65:  * @return mixed The cached data, or false if the data doesn't exist, has expired, or if there was an error fetching it
66:  * @access public
67:  */
68:     function read($key) {
69:         $time = time();
70:         $cachetime = intval(apc_fetch($key.'_expires'));
71:         if ($cachetime < $time || ($time + $this->settings['duration']) < $cachetime) {
72:             return false;
73:         }
74:         return apc_fetch($key);
75:     }
76: /**
77:  * Delete a key from the cache
78:  *
79:  * @param string $key Identifier for the data
80:  * @return boolean True if the value was succesfully deleted, false if it didn't exist or couldn't be removed
81:  * @access public
82:  */
83:     function delete($key) {
84:         return apc_delete($key);
85:     }
86: /**
87:  * Delete all keys from the cache
88:  *
89:  * @return boolean True if the cache was succesfully cleared, false otherwise
90:  * @access public
91:  */
92:     function clear() {
93:         return apc_clear_cache('user');
94:     }
95: }
96: ?>