1. sfAPCCache.class.php
  2. /**
 * Cache class that stores cached content in APC.
 *
 * @package    symfony
 * @subpackage cache
 * @author     Fabien Potencier 
 * @version    SVN: $Id: sfAPCCache.class.php 21990 2009-09-13 21:09:18Z FabianLange $
 */
  3. class sfAPCCache extends sfCache
  4. {
  5.   /**
  6.    * Initializes this sfCache instance.
  7.    *
  8.    * Available options:
  9.    *
  10.    * * see sfCache for options available for all drivers
  11.    *
  12.    * @see sfCache
  13.    */
  14.   public function initialize($options = array())
  15.   {
  16.     parent::initialize($options);
  18.     if (!function_exists('apc_store') || !ini_get('apc.enabled'))
  19.     {
  20.       throw new sfInitializationException('You must have APC installed and enabled to use sfAPCCache class.');
  21.     }
  22.   }
  24.  /**
  25.   * @see sfCache
  26.   */
  27.   public function get($key, $default = null)
  28.   {
  29.     $value = $this->fetch($this->getOption('prefix').$key, $has);
  30.     return $has ? $value : $default;
  31.   }
  33.   /**
  34.    * @see sfCache
  35.    */
  36.   public function has($key)
  37.   {
  38.     $this->fetch($this->getOption('prefix').$key, $has);
  39.     return $has;
  40.   }
  42.   private function fetch($key, &$success)
  43.   {
  44.     $has = null;
  45.     $value = apc_fetch($key, $has);
  46.     // the second argument was added in APC 3.0.17. If it is still null we fall back to the value returned
  47.     if (null !== $has)
  48.     {
  49.       $success = $has;
  50.     }
  51.     else
  52.     {
  53.       $success = $value !== false;
  54.     }
  55.     return $value;
  56.   }
  57.   
  58.   
  59.   /**
  60.    * @see sfCache
  61.    */
  62.   public function set($key, $data, $lifetime = null)
  63.   {
  64.     return apc_store($this->getOption('prefix').$key, $data, $this->getLifetime($lifetime));
  65.   }
  67.   /**
  68.    * @see sfCache
  69.    */
  70.   public function remove($key)
  71.   {
  72.     return apc_delete($this->getOption('prefix').$key);
  73.   }
  75.   /**
  76.    * @see sfCache
  77.    */
  78.   public function clean($mode = sfCache::ALL)
  79.   {
  80.     if (sfCache::ALL === $mode)
  81.     {
  82.       return apc_clear_cache('user');
  83.     }
  84.   }
  86.   /**
  87.    * @see sfCache
  88.    */
  89.   public function getLastModified($key)
  90.   {
  91.     if ($info = $this->getCacheInfo($key))
  92.     {
  93.       return $info['creation_time'] + $info['ttl'] > time() ? $info['mtime'] : 0;
  94.     }
  96.     return 0;
  97.   }
  99.   /**
  100.    * @see sfCache
  101.    */
  102.   public function getTimeout($key)
  103.   {
  104.     if ($info = $this->getCacheInfo($key))
  105.     {
  106.       return $info['creation_time'] + $info['ttl'] > time() ? $info['creation_time'] + $info['ttl'] : 0;
  107.     }
  109.     return 0;
  110.   }
  112.   /**
  113.    * @see sfCache
  114.    */
  115.   public function removePattern($pattern)
  116.   {
  117.     $infos = apc_cache_info('user');
  118.     if (!is_array($infos['cache_list']))
  119.     {
  120.       return;
  121.     }
  123.     $regexp = self::patternToRegexp($this->getOption('prefix').$pattern);
  125.     foreach ($infos['cache_list'] as $info)
  126.     {
  127.       if (preg_match($regexp, $info['info']))
  128.       {
  129.         apc_delete($info['info']);
  130.       }
  131.     }
  132.   }
  134.   protected function getCacheInfo($key)
  135.   {
  136.     $infos = apc_cache_info('user');
  138.     if (is_array($infos['cache_list']))
  139.     {
  140.       foreach ($infos['cache_list'] as $info)
  141.       {
  142.         if ($this->getOption('prefix').$key == $info['info'])
  143.         {
  144.           return $info;
  145.         }
  146.       }
  147.     }
  149.     return null;
  150.   }
  151. }
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