1 | <?php |
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2 | /** |
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3 | * Cache engine For XOOPS |
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4 | * |
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5 | * You may not change or alter any portion of this comment or credits |
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6 | * of supporting developers from this source code or any supporting source code |
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7 | * which is considered copyrighted (c) material of the original comment or credit authors. |
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8 | * This program is distributed in the hope that it will be useful, |
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9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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11 | * |
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12 | * @copyright (c) 2000-2016 XOOPS Project (www.xoops.org) |
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13 | * @license GNU GPL 2 (https://www.gnu.org/licenses/gpl-2.0.html) |
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14 | * @package class |
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15 | * @subpackage cache |
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16 | * @since 2.3.0 |
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17 | * @author Taiwen Jiang <[email protected]> |
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18 | */ |
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19 | defined('XOOPS_ROOT_PATH') || exit('Restricted access'); |
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20 | |||
21 | /** |
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22 | * Memcache storage engine for cache |
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23 | * |
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24 | * |
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25 | * PHP versions 4 and 5 |
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26 | * |
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27 | * CakePHP(tm) : Rapid Development Framework <https://www.cakephp.org/> |
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28 | * Copyright 2005-2008, Cake Software Foundation, Inc. |
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29 | * 1785 E. Sahara Avenue, Suite 490-204 |
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30 | * Las Vegas, Nevada 89104 |
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31 | * |
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32 | * Licensed under The MIT License |
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33 | * Redistributions of files must retain the above copyright notice. |
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34 | * |
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35 | * @filesource |
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36 | * @copyright Copyright 2005-2008, Cake Software Foundation, Inc. |
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37 | * @link https://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project |
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38 | * @package cake |
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39 | * @subpackage cake.cake.libs.cache |
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40 | * @since CakePHP(tm) v 1.2.0.4933 |
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41 | * @modifiedby $LastChangedBy$ |
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42 | * @lastmodified $Date$ |
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43 | * @license https://www.opensource.org/licenses/mit-license.php The MIT License |
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44 | */ |
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45 | |||
46 | /** |
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47 | * Memcache storage engine for cache |
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48 | * |
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49 | * @package cake |
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50 | * @subpackage cake.cake.libs.cache |
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51 | */ |
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52 | class XoopsCacheMemcache extends XoopsCacheEngine |
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53 | { |
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54 | /** |
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55 | * Memcache wrapper. |
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56 | * |
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57 | * @var object |
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58 | * @access private |
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59 | */ |
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60 | private $memcache; |
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61 | |||
62 | /** |
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63 | * settings |
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64 | * servers = string or array of memcache servers, default => 127.0.0.1 |
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65 | * compress = boolean, default => false |
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66 | * |
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67 | * @var array |
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68 | * @access public |
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69 | */ |
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70 | public $settings = array(); |
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71 | |||
72 | /** |
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73 | * Initialize the Cache Engine |
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74 | * |
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75 | * Called automatically by the cache frontend |
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76 | * To reinitialize the settings call Cache::engine('EngineName', [optional] settings = array()); |
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77 | * |
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78 | * @param array $settings array of setting for the engine |
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79 | * |
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80 | * @return boolean True if the engine has been successfully initialized, false if not |
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81 | * @access public |
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82 | */ |
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83 | public function init($settings = array()) |
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84 | { |
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85 | if (!class_exists('Memcache')) { |
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86 | return false; |
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87 | } |
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88 | parent::init($settings); |
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89 | $defaults = array( |
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90 | 'servers' => array( |
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91 | '127.0.0.1'), |
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92 | 'compress' => false); |
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93 | $this->settings = array_merge($defaults, $this->settings); |
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94 | |||
95 | if (!$this->settings['compress']) { |
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96 | $this->settings['compress'] = MEMCACHE_COMPRESSED; |
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97 | } |
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98 | if (!is_array($this->settings['servers'])) { |
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99 | $this->settings['servers'] = array($this->settings['servers']); |
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100 | } |
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101 | $this->memcache = null; |
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102 | $this->memcache = new Memcache(); |
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103 | foreach ($this->settings['servers'] as $server) { |
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104 | $parts = explode(':', $server); |
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105 | $host = $parts[0]; |
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106 | $port = 11211; |
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107 | if (isset($parts[1])) { |
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108 | $port = $parts[1]; |
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109 | } |
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110 | if ($this->memcache->addServer($host, $port)) { |
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111 | return true; |
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112 | } |
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113 | } |
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114 | |||
115 | return false; |
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116 | } |
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117 | |||
118 | /** |
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119 | * Write data for key into cache |
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120 | * |
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121 | * @param string $key Identifier for the data |
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122 | * @param mixed $value Data to be cached |
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123 | * @param integer $duration How long to cache the data, in seconds |
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124 | * @return boolean True if the data was successfully cached, false on failure |
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125 | * @access public |
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126 | */ |
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127 | public function write($key, $value, $duration = null) |
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128 | { |
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129 | return $this->memcache->set($key, $value, $this->settings['compress'], $duration); |
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130 | } |
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131 | |||
132 | /** |
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133 | * Read a key from the cache |
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134 | * |
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135 | * @param string $key Identifier for the data |
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136 | * @return mixed The cached data, or false if the data doesn't exist, has expired, or if there was an error fetching it |
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137 | * @access public |
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138 | */ |
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139 | public function read($key) |
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140 | { |
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141 | return $this->memcache->get($key); |
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142 | } |
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143 | |||
144 | /** |
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145 | * Delete a key from the cache |
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146 | * |
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147 | * @param string $key Identifier for the data |
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148 | * @return boolean True if the value was successfully deleted, false if it didn't exist or couldn't be removed |
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149 | * @access public |
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150 | */ |
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151 | public function delete($key) |
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152 | { |
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153 | return $this->memcache->delete($key); |
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154 | } |
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155 | |||
156 | /** |
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157 | * Delete all keys from the cache |
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158 | * |
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159 | * @return boolean True if the cache was successfully cleared, false otherwise |
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160 | * @access public |
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161 | */ |
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162 | public function clear($check = null) |
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163 | { |
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164 | return $this->memcache->flush(); |
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165 | } |
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166 | |||
167 | /** |
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168 | * Connects to a server in connection pool |
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169 | * |
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170 | * @param string $host host ip address or name |
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171 | * @param integer $port Server port |
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172 | * @return boolean True if memcache server was connected |
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173 | * @access public |
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174 | */ |
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175 | public function connect($host, $port = 11211) |
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176 | { |
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177 | if ($this->memcache->getServerStatus($host, $port) === 0) { |
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178 | if ($this->memcache->connect($host, $port)) { |
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179 | return true; |
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180 | } |
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181 | |||
182 | return false; |
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183 | } |
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184 | |||
185 | return true; |
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186 | } |
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187 | } |
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188 |