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   1  <?php
   2  /**
   3   * MyBB 1.6
   4   * Copyright 2010 MyBB Group, All Rights Reserved
   5   *
   6   * Website: http://mybb.com
   7   * License: http://mybb.com/about/license
   8   *
   9   * $Id$
  10   */
  11  
  12  /**
  13   * Memcache Cache Handler
  14   */
  15  class memcacheCacheHandler
  16  {
  17      /**
  18       * The memcache server resource
  19       */
  20      public $memcache;
  21  
  22      /**
  23       * Unique identifier representing this copy of MyBB
  24       */
  25      public $unique_id;
  26  
  27  	function memcacheCacheHandler($silent=false)
  28      {
  29          global $mybb;
  30  
  31          if(!function_exists("memcache_connect"))
  32          {
  33              // Check if our DB engine is loaded
  34              if(!extension_loaded("Memcache"))
  35              {
  36                  // Throw our super awesome cache loading error
  37                  $mybb->trigger_generic_error("memcache_load_error");
  38                  die;
  39              }
  40          }
  41      }
  42  
  43      /**
  44       * Connect and initialize this handler.
  45       *
  46       * @return boolean True if successful, false on failure
  47       */
  48  	function connect()
  49      {
  50          global $mybb, $error_handler;
  51  
  52          $this->memcache = new Memcache;
  53  
  54          if($mybb->config['memcache']['host'])
  55          {
  56              $mybb->config['memcache'][0] = $mybb->config['memcache'];
  57              unset($mybb->config['memcache']['host']);
  58              unset($mybb->config['memcache']['port']);
  59          }
  60  
  61          foreach($mybb->config['memcache'] as $memcache)
  62          {
  63              if(!$memcache['host'])
  64              {
  65                  $message = "Please configure the memcache settings in inc/config.php before attempting to use this cache handler";
  66                  $error_handler->trigger($message, MYBB_CACHEHANDLER_LOAD_ERROR);
  67                  die;
  68              }
  69  
  70              if(!isset($memcache['port']))
  71              {
  72                  $memcache['port'] = "11211";
  73              }
  74  
  75              $this->memcache->addServer($memcache['host'], $memcache['port']);
  76  
  77              if(!$this->memcache)
  78              {
  79                  $message = "Unable to connect to the memcache server on {$memcache['memcache_host']}:{$memcache['memcache_port']}. Are you sure it is running?";
  80                  $error_handler->trigger($message, MYBB_CACHEHANDLER_LOAD_ERROR);
  81                  die;
  82              }
  83          }
  84  
  85          // Set a unique identifier for all queries in case other forums are using the same memcache server
  86          $this->unique_id = md5(MYBB_ROOT);
  87  
  88          return true;
  89      }
  90  
  91      /**
  92       * Retrieve an item from the cache.
  93       *
  94       * @param string The name of the cache
  95       * @param boolean True if we should do a hard refresh
  96       * @return mixed Cache data if successful, false if failure
  97       */
  98  
  99  	function fetch($name, $hard_refresh=false)
 100      {
 101          $data = $this->memcache->get($this->unique_id."_".$name);
 102  
 103          if($data === false)
 104          {
 105              return false;
 106          }
 107          else
 108          {
 109              return $data;
 110          }
 111      }
 112  
 113      /**
 114       * Write an item to the cache.
 115       *
 116       * @param string The name of the cache
 117       * @param mixed The data to write to the cache item
 118       * @return boolean True on success, false on failure
 119       */
 120  	function put($name, $contents)
 121      {
 122          return $this->memcache->set($this->unique_id."_".$name, $contents);
 123      }
 124  
 125      /**
 126       * Delete a cache
 127       *
 128       * @param string The name of the cache
 129       * @return boolean True on success, false on failure
 130       */
 131  	function delete($name)
 132      {
 133          return $this->memcache->delete($this->unique_id."_".$name);
 134      }
 135  
 136      /**
 137       * Disconnect from the cache
 138       */
 139  	function disconnect()
 140      {
 141          @$this->memcache->close();
 142      }
 143  
 144  	function size_of($name)
 145      {
 146          global $lang;
 147  
 148          return $lang->na;
 149      }
 150  }
 151  
 152  ?>