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annotate cake/libs/cache/apc.php @ 0:261e66bd5a0c

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hg init
author Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
date Sun, 24 Jul 2011 21:08:31 +0900
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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1 <?php
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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2 /**
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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3 * APC storage engine for cache.
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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4 *
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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5 *
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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6 * PHP versions 4 and 5
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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7 *
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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8 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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9 * Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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10 *
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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11 * Licensed under The MIT License
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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12 * Redistributions of files must retain the above copyright notice.
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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13 *
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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14 * @copyright Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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15 * @link http://cakephp.org CakePHP(tm) Project
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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16 * @package cake
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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17 * @subpackage cake.cake.libs.cache
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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18 * @since CakePHP(tm) v 1.2.0.4933
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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19 * @license MIT License (http://www.opensource.org/licenses/mit-license.php)
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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20 */
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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21
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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22 /**
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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23 * APC storage engine for cache
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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24 *
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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25 * @package cake
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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26 * @subpackage cake.cake.libs.cache
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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27 */
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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28 class ApcEngine extends CacheEngine {
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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29
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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30 /**
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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31 * Initialize the Cache Engine
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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32 *
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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33 * Called automatically by the cache frontend
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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34 * To reinitialize the settings call Cache::engine('EngineName', [optional] settings = array());
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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35 *
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36 * @param array $setting array of setting for the engine
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37 * @return boolean True if the engine has been successfully initialized, false if not
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38 * @see CacheEngine::__defaults
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39 * @access public
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40 */
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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41 function init($settings = array()) {
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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42 parent::init(array_merge(array('engine' => 'Apc', 'prefix' => Inflector::slug(APP_DIR) . '_'), $settings));
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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43 return function_exists('apc_cache_info');
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44 }
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45
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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46 /**
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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47 * Write data for key into cache
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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48 *
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49 * @param string $key Identifier for the data
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50 * @param mixed $value Data to be cached
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51 * @param integer $duration How long to cache the data, in seconds
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52 * @return boolean True if the data was succesfully cached, false on failure
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53 * @access public
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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54 */
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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55 function write($key, &$value, $duration) {
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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56 $expires = time() + $duration;
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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57 apc_store($key.'_expires', $expires, $duration);
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58 return apc_store($key, $value, $duration);
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59 }
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60
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61 /**
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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62 * Read a key from the cache
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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63 *
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64 * @param string $key Identifier for the data
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65 * @return mixed The cached data, or false if the data doesn't exist, has expired, or if there was an error fetching it
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66 * @access public
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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67 */
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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68 function read($key) {
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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69 $time = time();
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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70 $cachetime = intval(apc_fetch($key.'_expires'));
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71 if ($cachetime < $time || ($time + $this->settings['duration']) < $cachetime) {
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72 return false;
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73 }
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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74 return apc_fetch($key);
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75 }
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76
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77 /**
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78 * Increments the value of an integer cached key
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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79 *
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80 * @param string $key Identifier for the data
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81 * @param integer $offset How much to increment
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82 * @param integer $duration How long to cache the data, in seconds
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83 * @return New incremented value, false otherwise
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84 * @access public
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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85 */
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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86 function increment($key, $offset = 1) {
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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87 return apc_inc($key, $offset);
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88 }
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89
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90 /**
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91 * Decrements the value of an integer cached key
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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92 *
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93 * @param string $key Identifier for the data
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94 * @param integer $offset How much to substract
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95 * @param integer $duration How long to cache the data, in seconds
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96 * @return New decremented value, false otherwise
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97 * @access public
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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98 */
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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99 function decrement($key, $offset = 1) {
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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100 return apc_dec($key, $offset);
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101 }
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102
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103 /**
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104 * Delete a key from the cache
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105 *
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106 * @param string $key Identifier for the data
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107 * @return boolean True if the value was succesfully deleted, false if it didn't exist or couldn't be removed
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108 * @access public
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109 */
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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110 function delete($key) {
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Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
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111 return apc_delete($key);
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112 }
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113
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114 /**
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115 * Delete all keys from the cache
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116 *
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117 * @return boolean True if the cache was succesfully cleared, false otherwise
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118 * @access public
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119 */
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120 function clear() {
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121 return apc_clear_cache('user');
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122 }
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123 }