1: <?php
 2: /**
 3:  * Cache Session save handler. Allows saving session information into Cache.
 4:  *
 5:  * PHP 5
 6:  *
 7:  * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 8:  * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 9:  *
10:  * Licensed under The MIT License
11:  * For full copyright and license information, please see the LICENSE.txt
12:  * Redistributions of files must retain the above copyright notice.
13:  *
14:  * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
15:  * @link          http://cakephp.org CakePHP(tm) Project
16:  * @package       Cake.Model.Datasource.Session
17:  * @since         CakePHP(tm) v 2.0
18:  * @license       http://www.opensource.org/licenses/mit-license.php MIT License
19:  */
20: 
21: App::uses('Cache', 'Cache');
22: App::uses('CakeSessionHandlerInterface', 'Model/Datasource/Session');
23: 
24: /**
25:  * CacheSession provides method for saving sessions into a Cache engine. Used with CakeSession
26:  *
27:  * @package       Cake.Model.Datasource.Session
28:  * @see CakeSession for configuration information.
29:  */
30: class CacheSession implements CakeSessionHandlerInterface {
31: 
32: /**
33:  * Method called on open of a database session.
34:  *
35:  * @return boolean Success
36:  */
37:     public function open() {
38:         return true;
39:     }
40: 
41: /**
42:  * Method called on close of a database session.
43:  *
44:  * @return boolean Success
45:  */
46:     public function close() {
47:         return true;
48:     }
49: 
50: /**
51:  * Method used to read from a database session.
52:  *
53:  * @param string $id The key of the value to read
54:  * @return mixed The value of the key or false if it does not exist
55:  */
56:     public function read($id) {
57:         return Cache::read($id, Configure::read('Session.handler.config'));
58:     }
59: 
60: /**
61:  * Helper function called on write for database sessions.
62:  *
63:  * @param integer $id ID that uniquely identifies session in database
64:  * @param mixed $data The value of the data to be saved.
65:  * @return boolean True for successful write, false otherwise.
66:  */
67:     public function write($id, $data) {
68:         return Cache::write($id, $data, Configure::read('Session.handler.config'));
69:     }
70: 
71: /**
72:  * Method called on the destruction of a database session.
73:  *
74:  * @param integer $id ID that uniquely identifies session in cache
75:  * @return boolean True for successful delete, false otherwise.
76:  */
77:     public function destroy($id) {
78:         return Cache::delete($id, Configure::read('Session.handler.config'));
79:     }
80: 
81: /**
82:  * Helper function called on gc for cache sessions.
83:  *
84:  * @param integer $expires Timestamp (defaults to current time)
85:  * @return boolean Success
86:  */
87:     public function gc($expires = null) {
88:         return Cache::gc(Configure::read('Session.handler.config'), $expires);
89:     }
90: 
91: }
92: