pictcode / lib / Cake / Cache / Engine / WincacheEngine.php @ 0b1b8047
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1 | 635eef61 | spyder1211 | <?php
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2 | /**
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3 | * Wincache storage engine for cache.
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4 | *
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5 | * Supports wincache 1.1.0 and higher.
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6 | *
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7 | * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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8 | * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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9 | *
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10 | * Licensed under The MIT License
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11 | * For full copyright and license information, please see the LICENSE.txt
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12 | * Redistributions of files must retain the above copyright notice.
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13 | *
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14 | * @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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15 | * @link http://cakephp.org CakePHP(tm) Project
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16 | * @package Cake.Cache.Engine
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17 | * @since CakePHP(tm) v 1.2.0.4933
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18 | * @license http://www.opensource.org/licenses/mit-license.php MIT License
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19 | */
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20 | |||
21 | /**
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22 | * Wincache storage engine for cache
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23 | *
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24 | * @package Cake.Cache.Engine
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25 | */
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26 | class WincacheEngine extends CacheEngine { |
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27 | |||
28 | /**
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29 | * Contains the compiled group names
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30 | * (prefixed with the global configuration prefix)
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31 | *
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32 | * @var array
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33 | */
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34 | protected $_compiledGroupNames = array(); |
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35 | |||
36 | /**
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37 | * Initialize the Cache Engine
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38 | *
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39 | * Called automatically by the cache frontend
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40 | * To reinitialize the settings call Cache::engine('EngineName', [optional] settings = array());
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41 | *
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42 | * @param array $settings array of setting for the engine
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43 | * @return bool True if the engine has been successfully initialized, false if not
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44 | * @see CacheEngine::__defaults
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45 | */
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46 | public function init($settings = array()) { |
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47 | if (!isset($settings['prefix'])) { |
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48 | $settings['prefix'] = Inflector::slug(APP_DIR) . '_'; |
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49 | } |
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50 | $settings += array('engine' => 'Wincache'); |
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51 | parent::init($settings); |
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52 | return function_exists('wincache_ucache_info'); |
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53 | } |
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54 | |||
55 | /**
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56 | * Write data for key into cache
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57 | *
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58 | * @param string $key Identifier for the data
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59 | * @param mixed $value Data to be cached
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60 | * @param int $duration How long to cache the data, in seconds
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61 | * @return bool True if the data was successfully cached, false on failure
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62 | */
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63 | public function write($key, $value, $duration) { |
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64 | $expires = time() + $duration; |
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65 | |||
66 | $data = array( |
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67 | $key . '_expires' => $expires, |
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68 | $key => $value |
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69 | ); |
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70 | $result = wincache_ucache_set($data, null, $duration); |
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71 | return empty($result); |
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72 | } |
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73 | |||
74 | /**
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75 | * Read a key from the cache
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76 | *
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77 | * @param string $key Identifier for the data
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78 | * @return mixed The cached data, or false if the data doesn't exist, has expired, or if
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79 | * there was an error fetching it
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80 | */
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81 | public function read($key) { |
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82 | $time = time(); |
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83 | $cachetime = (int)wincache_ucache_get($key . '_expires'); |
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84 | if ($cachetime < $time || ($time + $this->settings['duration']) < $cachetime) { |
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85 | return false; |
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86 | } |
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87 | return wincache_ucache_get($key); |
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88 | } |
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89 | |||
90 | /**
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91 | * Increments the value of an integer cached key
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92 | *
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93 | * @param string $key Identifier for the data
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94 | * @param int $offset How much to increment
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95 | * @return New incremented value, false otherwise
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96 | */
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97 | public function increment($key, $offset = 1) { |
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98 | return wincache_ucache_inc($key, $offset); |
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99 | } |
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100 | |||
101 | /**
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102 | * Decrements the value of an integer cached key
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103 | *
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104 | * @param string $key Identifier for the data
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105 | * @param int $offset How much to subtract
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106 | * @return New decremented value, false otherwise
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107 | */
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108 | public function decrement($key, $offset = 1) { |
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109 | return wincache_ucache_dec($key, $offset); |
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110 | } |
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111 | |||
112 | /**
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113 | * Delete a key from the cache
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114 | *
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115 | * @param string $key Identifier for the data
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116 | * @return bool True if the value was successfully deleted, false if it didn't exist or couldn't be removed
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117 | */
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118 | public function delete($key) { |
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119 | return wincache_ucache_delete($key); |
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120 | } |
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121 | |||
122 | /**
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123 | * Delete all keys from the cache. This will clear every
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124 | * item in the cache matching the cache config prefix.
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125 | *
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126 | * @param bool $check If true, nothing will be cleared, as entries will
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127 | * naturally expire in wincache..
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128 | * @return bool True Returns true.
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129 | */
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130 | public function clear($check) { |
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131 | if ($check) { |
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132 | return true; |
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133 | } |
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134 | $info = wincache_ucache_info();
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135 | $cacheKeys = $info['ucache_entries']; |
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136 | unset($info); |
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137 | foreach ($cacheKeys as $key) { |
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138 | if (strpos($key['key_name'], $this->settings['prefix']) === 0) { |
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139 | wincache_ucache_delete($key['key_name']); |
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140 | } |
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141 | } |
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142 | return true; |
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143 | } |
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144 | |||
145 | /**
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146 | * Returns the `group value` for each of the configured groups
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147 | * If the group initial value was not found, then it initializes
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148 | * the group accordingly.
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149 | *
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150 | * @return array
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151 | */
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152 | public function groups() { |
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153 | if (empty($this->_compiledGroupNames)) { |
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154 | foreach ($this->settings['groups'] as $group) { |
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155 | $this->_compiledGroupNames[] = $this->settings['prefix'] . $group; |
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156 | } |
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157 | } |
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158 | |||
159 | $groups = wincache_ucache_get($this->_compiledGroupNames); |
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160 | if (count($groups) !== count($this->settings['groups'])) { |
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161 | foreach ($this->_compiledGroupNames as $group) { |
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162 | if (!isset($groups[$group])) { |
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163 | wincache_ucache_set($group, 1); |
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164 | $groups[$group] = 1; |
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165 | } |
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166 | } |
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167 | ksort($groups); |
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168 | } |
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169 | |||
170 | $result = array(); |
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171 | $groups = array_values($groups); |
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172 | foreach ($this->settings['groups'] as $i => $group) { |
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173 | $result[] = $group . $groups[$i]; |
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174 | } |
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175 | return $result; |
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176 | } |
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177 | |||
178 | /**
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179 | * Increments the group value to simulate deletion of all keys under a group
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180 | * old values will remain in storage until they expire.
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181 | *
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182 | * @param string $group The group to clear.
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183 | * @return bool success
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184 | */
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185 | public function clearGroup($group) { |
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186 | $success = null; |
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187 | wincache_ucache_inc($this->settings['prefix'] . $group, 1, $success); |
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188 | return $success; |
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189 | } |
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190 | |||
191 | } |