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anikendra |
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<?php
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/**
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* Wincache storage engine for cache.
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*
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* Supports wincache 1.1.0 and higher.
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*
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* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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* Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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*
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* Licensed under The MIT License
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* For full copyright and license information, please see the LICENSE.txt
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* Redistributions of files must retain the above copyright notice.
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*
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* @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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* @link http://cakephp.org CakePHP(tm) Project
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* @package Cake.Cache.Engine
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* @since CakePHP(tm) v 1.2.0.4933
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* @license http://www.opensource.org/licenses/mit-license.php MIT License
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*/
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/**
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* Wincache storage engine for cache
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*
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* @package Cake.Cache.Engine
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*/
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class WincacheEngine extends CacheEngine {
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/**
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* Contains the compiled group names
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* (prefixed with the global configuration prefix)
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*
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* @var array
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*/
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protected $_compiledGroupNames = array();
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/**
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* Initialize the Cache Engine
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*
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* Called automatically by the cache frontend
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* To reinitialize the settings call Cache::engine('EngineName', [optional] settings = array());
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*
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* @param array $settings array of setting for the engine
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* @return bool True if the engine has been successfully initialized, false if not
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* @see CacheEngine::__defaults
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*/
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public function init($settings = array()) {
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if (!isset($settings['prefix'])) {
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$settings['prefix'] = Inflector::slug(APP_DIR) . '_';
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}
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$settings += array('engine' => 'Wincache');
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parent::init($settings);
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return function_exists('wincache_ucache_info');
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}
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/**
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* Write data for key into cache
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*
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* @param string $key Identifier for the data
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* @param mixed $value Data to be cached
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* @param int $duration How long to cache the data, in seconds
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* @return bool True if the data was successfully cached, false on failure
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*/
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public function write($key, $value, $duration) {
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$expires = time() + $duration;
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$data = array(
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$key . '_expires' => $expires,
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$key => $value
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);
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$result = wincache_ucache_set($data, null, $duration);
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return empty($result);
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}
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/**
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* Read a key from the cache
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*
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* @param string $key Identifier for the data
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* @return mixed The cached data, or false if the data doesn't exist, has expired, or if
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* there was an error fetching it
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*/
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public function read($key) {
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$time = time();
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$cachetime = (int)wincache_ucache_get($key . '_expires');
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if ($cachetime < $time || ($time + $this->settings['duration']) < $cachetime) {
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return false;
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}
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return wincache_ucache_get($key);
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}
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/**
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* Increments the value of an integer cached key
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*
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* @param string $key Identifier for the data
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* @param int $offset How much to increment
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* @return New incremented value, false otherwise
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*/
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public function increment($key, $offset = 1) {
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return wincache_ucache_inc($key, $offset);
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}
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/**
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* Decrements the value of an integer cached key
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*
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* @param string $key Identifier for the data
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* @param int $offset How much to subtract
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* @return New decremented value, false otherwise
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*/
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public function decrement($key, $offset = 1) {
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return wincache_ucache_dec($key, $offset);
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}
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/**
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* Delete a key from the cache
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*
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* @param string $key Identifier for the data
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* @return bool True if the value was successfully deleted, false if it didn't exist or couldn't be removed
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*/
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public function delete($key) {
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return wincache_ucache_delete($key);
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}
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/**
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* Delete all keys from the cache. This will clear every
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* item in the cache matching the cache config prefix.
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*
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* @param bool $check If true, nothing will be cleared, as entries will
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* naturally expire in wincache..
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* @return bool True Returns true.
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*/
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public function clear($check) {
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if ($check) {
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return true;
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}
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$info = wincache_ucache_info();
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$cacheKeys = $info['ucache_entries'];
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unset($info);
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foreach ($cacheKeys as $key) {
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if (strpos($key['key_name'], $this->settings['prefix']) === 0) {
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wincache_ucache_delete($key['key_name']);
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}
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}
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return true;
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}
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/**
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* Returns the `group value` for each of the configured groups
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* If the group initial value was not found, then it initializes
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* the group accordingly.
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*
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* @return array
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*/
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public function groups() {
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if (empty($this->_compiledGroupNames)) {
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foreach ($this->settings['groups'] as $group) {
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$this->_compiledGroupNames[] = $this->settings['prefix'] . $group;
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}
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}
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$groups = wincache_ucache_get($this->_compiledGroupNames);
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if (count($groups) !== count($this->settings['groups'])) {
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foreach ($this->_compiledGroupNames as $group) {
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if (!isset($groups[$group])) {
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wincache_ucache_set($group, 1);
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$groups[$group] = 1;
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}
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}
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ksort($groups);
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}
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$result = array();
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$groups = array_values($groups);
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foreach ($this->settings['groups'] as $i => $group) {
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$result[] = $group . $groups[$i];
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}
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return $result;
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}
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/**
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* Increments the group value to simulate deletion of all keys under a group
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* old values will remain in storage until they expire.
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*
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* @param string $group The group to clear.
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* @return bool success
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*/
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public function clearGroup($group) {
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$success = null;
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wincache_ucache_inc($this->settings['prefix'] . $group, 1, $success);
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return $success;
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}
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}
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