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Revision Autor Zeilennr. Zeile
1 lars 1 
<?php
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/*
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 * This file is part of the symfony package.
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 * (c) 2004-2006 Fabien Potencier <fabien.potencier@symfony-project.com>
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 *
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 * For the full copyright and license information, please view the LICENSE
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 * file that was distributed with this source code.
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 */
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/**
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 * Cache class that stores cached content in APC.
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 *
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 * @package    symfony
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 * @subpackage cache
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 * @author     Fabien Potencier <fabien.potencier@symfony-project.com>
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 * @version    SVN: $Id: sfAPCCache.class.php 21990 2009-09-13 21:09:18Z FabianLange $
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 */
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class sfAPCCache extends sfCache
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{
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  /**
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   * Initializes this sfCache instance.
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   *
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   * Available options:
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   *
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   * * see sfCache for options available for all drivers
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   *
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   * @see sfCache
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   */
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  public function initialize($options = array())
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  {
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    parent::initialize($options);
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    if (!function_exists('apc_store') || !ini_get('apc.enabled'))
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    {
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      throw new sfInitializationException('You must have APC installed and enabled to use sfAPCCache class.');
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    }
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  }
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 /**
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  * @see sfCache
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  */
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  public function get($key, $default = null)
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  {
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    $value = $this->fetch($this->getOption('prefix').$key, $has);
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    return $has ? $value : $default;
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  }
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  /**
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   * @see sfCache
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   */
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  public function has($key)
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  {
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    $this->fetch($this->getOption('prefix').$key, $has);
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    return $has;
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  }
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  private function fetch($key, &$success)
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  {
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    $has = null;
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    $value = apc_fetch($key, $has);
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    // the second argument was added in APC 3.0.17. If it is still null we fall back to the value returned
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    if (null !== $has)
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    {
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      $success = $has;
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    }
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    else
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    {
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      $success = $value !== false;
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    }
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    return $value;
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  }
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  /**
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   * @see sfCache
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   */
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  public function set($key, $data, $lifetime = null)
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  {
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    return apc_store($this->getOption('prefix').$key, $data, $this->getLifetime($lifetime));
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  }
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  /**
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   * @see sfCache
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   */
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  public function remove($key)
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  {
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    return apc_delete($this->getOption('prefix').$key);
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  }
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  /**
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   * @see sfCache
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   */
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  public function clean($mode = sfCache::ALL)
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  {
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    if (sfCache::ALL === $mode)
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    {
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      return apc_clear_cache('user');
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    }
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  }
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  /**
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   * @see sfCache
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   */
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  public function getLastModified($key)
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  {
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    if ($info = $this->getCacheInfo($key))
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    {
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      return $info['creation_time'] + $info['ttl'] > time() ? $info['mtime'] : 0;
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    }
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    return 0;
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  }
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  /**
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   * @see sfCache
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   */
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  public function getTimeout($key)
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  {
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    if ($info = $this->getCacheInfo($key))
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    {
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      return $info['creation_time'] + $info['ttl'] > time() ? $info['creation_time'] + $info['ttl'] : 0;
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    }
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    return 0;
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  }
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  /**
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   * @see sfCache
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   */
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  public function removePattern($pattern)
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  {
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    $infos = apc_cache_info('user');
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    if (!is_array($infos['cache_list']))
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    {
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      return;
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    }
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    $regexp = self::patternToRegexp($this->getOption('prefix').$pattern);
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    foreach ($infos['cache_list'] as $info)
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    {
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      if (preg_match($regexp, $info['info']))
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      {
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        apc_delete($info['info']);
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      }
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    }
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  }
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  protected function getCacheInfo($key)
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  {
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    $infos = apc_cache_info('user');
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    if (is_array($infos['cache_list']))
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    {
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      foreach ($infos['cache_list'] as $info)
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      {
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        if ($this->getOption('prefix').$key == $info['info'])
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        {
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          return $info;
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        }
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      }
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    }
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    return null;
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  }
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}