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 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
 9:  *
10:  * Licensed under The MIT License
11:  * Redistributions of files must retain the above copyright notice.
12:  *
13:  * @copyright     Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
14:  * @link          http://cakephp.org CakePHP(tm) Project
15:  * @package       Cake.Model.Datasource.Session
16:  * @since         CakePHP(tm) v 2.0
17:  * @license       MIT License (http://www.opensource.org/licenses/mit-license.php)
18:  */
19: 
20: App::uses('Cache', 'Cache');
21: App::uses('CakeSessionHandlerInterface', 'Model/Datasource/Session');
22: 
23: /**
24:  * CacheSession provides method for saving sessions into a Cache engine. Used with CakeSession
25:  *
26:  * @package       Cake.Model.Datasource.Session
27:  * @see CakeSession for configuration information.
28:  */
29: class CacheSession implements CakeSessionHandlerInterface {
30: 
31: /**
32:  * Method called on open of a database session.
33:  *
34:  * @return boolean Success
35:  */
36:     public function open() {
37:         return true;
38:     }
39: 
40: /**
41:  * Method called on close of a database session.
42:  *
43:  * @return boolean Success
44:  */
45:     public function close() {
46:         return true;
47:     }
48: 
49: /**
50:  * Method used to read from a database session.
51:  *
52:  * @param string $id The key of the value to read
53:  * @return mixed The value of the key or false if it does not exist
54:  */
55:     public function read($id) {
56:         return Cache::read($id, Configure::read('Session.handler.config'));
57:     }
58: 
59: /**
60:  * Helper function called on write for database sessions.
61:  *
62:  * @param integer $id ID that uniquely identifies session in database
63:  * @param mixed $data The value of the data to be saved.
64:  * @return boolean True for successful write, false otherwise.
65:  */
66:     public function write($id, $data) {
67:         return Cache::write($id, $data, Configure::read('Session.handler.config'));
68:     }
69: 
70: /**
71:  * Method called on the destruction of a database session.
72:  *
73:  * @param integer $id ID that uniquely identifies session in cache
74:  * @return boolean True for successful delete, false otherwise.
75:  */
76:     public function destroy($id) {
77:         return Cache::delete($id, Configure::read('Session.handler.config'));
78:     }
79: 
80: /**
81:  * Helper function called on gc for cache sessions.
82:  *
83:  * @param integer $expires Timestamp (defaults to current time)
84:  * @return boolean Success
85:  */
86:     public function gc($expires = null) {
87:         return Cache::gc(Configure::read('Session.handler.config'), $expires);
88:     }
89: 
90: }
91: