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<?php
/**
* Wincache storage engine for cache.
*
* Supports wincache 1.1.0 and higher.
*
* PHP 5
*
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @package Cake.Cache.Engine
* @since CakePHP(tm) v 1.2.0.4933
* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
*/
/**
* Wincache storage engine for cache
*
* @package Cake.Cache.Engine
*/
class WincacheEngine extends CacheEngine {
/**
* Contains the compiled group names
* (prefixed witht the global configuration prefix)
*
* @var array
**/
protected $_compiledGroupNames = array();
/**
* Initialize the Cache Engine
*
* Called automatically by the cache frontend
* To reinitialize the settings call Cache::engine('EngineName', [optional] settings = array());
*
* @param array $settings array of setting for the engine
* @return boolean True if the engine has been successfully initialized, false if not
* @see CacheEngine::__defaults
*/
public function init($settings = array()) {
if (!isset($settings['prefix'])) {
$settings['prefix'] = Inflector::slug(APP_DIR) . '_';
}
$settings += array('engine' => 'Wincache');
parent::init($settings);
return function_exists('wincache_ucache_info');
}
/**
* Write data for key into cache
*
* @param string $key Identifier for the data
* @param mixed $value Data to be cached
* @param integer $duration How long to cache the data, in seconds
* @return boolean True if the data was successfully cached, false on failure
*/
public function write($key, $value, $duration) {
$expires = time() + $duration;
$data = array(
$key . '_expires' => $expires,
$key => $value
);
$result = wincache_ucache_set($data, null, $duration);
return empty($result);
}
/**
* Read a key from the cache
*
* @param string $key Identifier for the data
* @return mixed The cached data, or false if the data doesn't exist, has expired, or if
* there was an error fetching it
*/
public function read($key) {
$time = time();
$cachetime = intval(wincache_ucache_get($key . '_expires'));
if ($cachetime < $time || ($time + $this->settings['duration']) < $cachetime) {
return false;
}
return wincache_ucache_get($key);
}
/**
* Increments the value of an integer cached key
*
* @param string $key Identifier for the data
* @param integer $offset How much to increment
* @return New incremented value, false otherwise
*/
public function increment($key, $offset = 1) {
return wincache_ucache_inc($key, $offset);
}
/**
* Decrements the value of an integer cached key
*
* @param string $key Identifier for the data
* @param integer $offset How much to subtract
* @return New decremented value, false otherwise
*/
public function decrement($key, $offset = 1) {
return wincache_ucache_dec($key, $offset);
}
/**
* Delete a key from the cache
*
* @param string $key Identifier for the data
* @return boolean True if the value was successfully deleted, false if it didn't exist or couldn't be removed
*/
public function delete($key) {
return wincache_ucache_delete($key);
}
/**
* Delete all keys from the cache. This will clear every
* item in the cache matching the cache config prefix.
*
* @param boolean $check If true, nothing will be cleared, as entries will
* naturally expire in wincache..
* @return boolean True Returns true.
*/
public function clear($check) {
if ($check) {
return true;
}
$info = wincache_ucache_info();
$cacheKeys = $info['ucache_entries'];
unset($info);
foreach ($cacheKeys as $key) {
if (strpos($key['key_name'], $this->settings['prefix']) === 0) {
wincache_ucache_delete($key['key_name']);
}
}
return true;
}
/**
* Returns the `group value` for each of the configured groups
* If the group initial value was not found, then it initializes
* the group accordingly.
*
* @return array
**/
public function groups() {
if (empty($this->_compiledGroupNames)) {
foreach ($this->settings['groups'] as $group) {
$this->_compiledGroupNames[] = $this->settings['prefix'] . $group;
}
}
$groups = wincache_ucache_get($this->_compiledGroupNames);
if (count($groups) !== count($this->settings['groups'])) {
foreach ($this->_compiledGroupNames as $group) {
if (!isset($groups[$group])) {
wincache_ucache_set($group, 1);
$groups[$group] = 1;
}
}
ksort($groups);
}
$result = array();
$groups = array_values($groups);
foreach ($this->settings['groups'] as $i => $group) {
$result[] = $group . $groups[$i];
}
return $result;
}
/**
* Increments the group value to simulate deletion of all keys under a group
* old values will remain in storage until they expire.
*
* @return boolean success
**/
public function clearGroup($group) {
wincache_ucache_inc($this->settings['prefix'] . $group, 1, $success);
return $success;
}
}
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