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<?php |
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/** |
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* Cache |
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* |
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* Multi-strategy cache store. |
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* |
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* @package core |
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* @author [email protected] |
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* @copyright Caffeina srl - 2015 - http://caffeina.com |
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*/ |
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class Cache { |
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use Module, Events; |
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protected static $driver = null, |
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$enabled = true; |
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public static function get($key, $default='', $expire=0){ |
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if (static::$enabled){ |
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$hash = static::hash($key); |
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if(static::$driver->exists($hash) && $results = static::$driver->get($hash)){ |
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return $results; |
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} else { |
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if($data = is_callable($default)?call_user_func($default):$default){ |
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static::$driver->set($hash,$data,$expire); |
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} |
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return $data; |
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} |
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} else { |
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return is_callable($default) ? call_user_func($default) : $default; |
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} |
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} |
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/** |
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* Load cache drivers with a FCFS strategy |
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* |
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* @method using |
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* @param mixed $driver can be a single driver name string, an array of driver names or a map [ driver_name => driver_options array ] |
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* @return bool true if a driver was loaded |
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* @example |
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* |
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* Cache::using('redis'); |
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* Cache::using(['redis','files','memory']); // Prefer "redis" over "files" over "memory" caching |
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* Cache::using([ |
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* 'redis' => [ |
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* 'host' => '127.0.0.1', |
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* 'prefix' => 'mycache', |
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* ], |
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* 'files' => [ |
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* 'cache_dir' => '/tmp', |
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* ], |
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* 'memory' |
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* ]); |
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* |
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*/ |
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public static function using($driver){ |
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foreach((array)$driver as $key => $value){ |
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if(is_numeric($key)){ |
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$drv = $value; |
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$conf = []; |
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} else { |
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$drv = $key; |
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$conf = $value; |
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} |
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$class = 'Cache\\' . ucfirst(strtolower($drv)); |
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if(class_exists($class) && $class::valid()) { |
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static::$driver = new $class($conf); |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* Returns/Set master switch on cache. |
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* |
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* @method enabled |
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* |
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* @param boolean $enabled Enable/Disable the cache status. |
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* |
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* @return boolean Cache on/off status |
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*/ |
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public static function enabled($enabled=null){ |
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return $enabled ? static::$enabled : static::$enabled = $enabled; |
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} |
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public static function set($key, $value, $expire=0){ |
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return static::$driver->set(static::hash($key),$value,$expire); |
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} |
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public static function delete($key){ |
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return static::$driver->delete(static::hash($key)); |
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} |
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public static function exists($key){ |
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return static::$enabled && static::$driver->exists(static::hash($key)); |
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} |
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public static function flush(){ |
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return static::$driver->flush(); |
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} |
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public static function inc($key, $value=1){ |
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return static::$driver->inc(static::hash($key),$value); |
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} |
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public static function dec($key, $value=1){ |
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return static::$driver->dec(static::hash($key),$value); |
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} |
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public static function hash($key, $group=null){ |
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static $hashes = []; |
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if (false === isset($hashes[$group][$key])){ |
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$k = $key; |
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if(is_array($key) && count($key)>1) list($group,$key) = $k; |
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$hashes[$group][$key] = ($group?$group.'-':'') . md5($key); |
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} |
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return $hashes[$group][$key]; |
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} |
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} |
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Cache::using(['files','memory']); |
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