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   1  <?php
   2  /**
   3  *
   4  * @package acm
   5  * @version $Id$
   6  * @copyright (c) 2005, 2009 phpBB Group
   7  * @license http://opensource.org/licenses/gpl-license.php GNU Public License
   8  *
   9  */
  10  
  11  /**
  12  * @ignore
  13  */
  14  if (!defined('IN_PHPBB'))
  15  {
  16      exit;
  17  }
  18  
  19  // Include the abstract base
  20  if (!class_exists('acm_memory'))
  21  {
  22      require("{$phpbb_root_path}includes/acm/acm_memory.$phpEx");
  23  }
  24  
  25  if (!defined('PHPBB_ACM_MEMCACHE_PORT'))
  26  {
  27      define('PHPBB_ACM_MEMCACHE_PORT', 11211);
  28  }
  29  
  30  if (!defined('PHPBB_ACM_MEMCACHE_COMPRESS'))
  31  {
  32      define('PHPBB_ACM_MEMCACHE_COMPRESS', false);
  33  }
  34  
  35  if (!defined('PHPBB_ACM_MEMCACHE_HOST'))
  36  {
  37      define('PHPBB_ACM_MEMCACHE_HOST', 'localhost');
  38  }
  39  
  40  if (!defined('PHPBB_ACM_MEMCACHE'))
  41  {
  42      //can define multiple servers with host1/port1,host2/port2 format
  43      define('PHPBB_ACM_MEMCACHE', PHPBB_ACM_MEMCACHE_HOST . '/' . PHPBB_ACM_MEMCACHE_PORT);
  44  }
  45  
  46  /**
  47  * ACM for Memcached
  48  * @package acm
  49  */
  50  class acm extends acm_memory
  51  {
  52      var $extension = 'memcache';
  53  
  54      var $memcache;
  55      var $flags = 0;
  56  
  57  	function acm()
  58      {
  59          // Call the parent constructor
  60          parent::acm_memory();
  61  
  62          $this->memcache = new Memcache;
  63          foreach(explode(',', PHPBB_ACM_MEMCACHE) as $u)
  64          {
  65              $parts = explode('/', $u);
  66              $this->memcache->addServer(trim($parts[0]), trim($parts[1]));
  67          }
  68          $this->flags = (PHPBB_ACM_MEMCACHE_COMPRESS) ? MEMCACHE_COMPRESSED : 0;
  69      }
  70  
  71      /**
  72      * Unload the cache resources
  73      *
  74      * @return null
  75      */
  76  	function unload()
  77      {
  78          parent::unload();
  79  
  80          $this->memcache->close();
  81      }
  82  
  83      /**
  84      * Purge cache data
  85      *
  86      * @return null
  87      */
  88  	function purge()
  89      {
  90          $this->memcache->flush();
  91  
  92          parent::purge();
  93      }
  94  
  95      /**
  96      * Fetch an item from the cache
  97      *
  98      * @access protected
  99      * @param string $var Cache key
 100      * @return mixed Cached data
 101      */
 102  	function _read($var)
 103      {
 104          return $this->memcache->get($this->key_prefix . $var);
 105      }
 106  
 107      /**
 108      * Store data in the cache
 109      *
 110      * @access protected
 111      * @param string $var Cache key
 112      * @param mixed $data Data to store
 113      * @param int $ttl Time-to-live of cached data
 114      * @return bool True if the operation succeeded
 115      */
 116  	function _write($var, $data, $ttl = 2592000)
 117      {
 118          if (!$this->memcache->replace($this->key_prefix . $var, $data, $this->flags, $ttl))
 119          {
 120              return $this->memcache->set($this->key_prefix . $var, $data, $this->flags, $ttl);
 121          }
 122          return true;
 123      }
 124  
 125      /**
 126      * Remove an item from the cache
 127      *
 128      * @access protected
 129      * @param string $var Cache key
 130      * @return bool True if the operation succeeded
 131      */
 132  	function _delete($var)
 133      {
 134          return $this->memcache->delete($this->key_prefix . $var);
 135      }
 136  }
 137  
 138  ?>