crm.fsf.org/20131203/files/sites/all/modules-new/civicrm/CRM/Utils/Cache/Memcache.php

   1 <?php
   2 /*
   3  +--------------------------------------------------------------------+
   4  | CiviCRM version 4.6                                                |
   5  +--------------------------------------------------------------------+
   6  | Copyright CiviCRM LLC (c) 2004-2015                                |
   7  +--------------------------------------------------------------------+
   8  | This file is a part of CiviCRM.                                    |
   9  |                                                                    |
  10  | CiviCRM is free software; you can copy, modify, and distribute it  |
  11  | under the terms of the GNU Affero General Public License           |
  12  | Version 3, 19 November 2007 and the CiviCRM Licensing Exception.   |
  13  |                                                                    |
  14  | CiviCRM is distributed in the hope that it will be useful, but     |
  15  | WITHOUT ANY WARRANTY; without even the implied warranty of         |
  16  | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.               |
  17  | See the GNU Affero General Public License for more details.        |
  18  |                                                                    |
  19  | You should have received a copy of the GNU Affero General Public   |
  20  | License and the CiviCRM Licensing Exception along                  |
  21  | with this program; if not, contact CiviCRM LLC                     |
  22  | at info[AT]civicrm[DOT]org. If you have questions about the        |
  23  | GNU Affero General Public License or the licensing of CiviCRM,     |
  24  | see the CiviCRM license FAQ at http://civicrm.org/licensing        |
  25  +--------------------------------------------------------------------+
  26  */
  27
  28 /**
  29  *
  30  * @package CRM
  31  * @copyright CiviCRM LLC (c) 2004-2015
  32  * $Id$
  33  *
  34  */
  35 class CRM_Utils_Cache_Memcache {
  36   const DEFAULT_HOST = 'localhost';
  37   const DEFAULT_PORT = 11211;
  38   const DEFAULT_TIMEOUT = 3600;
  39   const DEFAULT_PREFIX = '';
  40
  41   /**
  42    * The host name of the memcached server.
  43    *
  44    * @var string
  45    */
  46   protected $_host = self::DEFAULT_HOST;
  47
  48   /**
  49    * The port on which to connect on.
  50    *
  51    * @var int
  52    */
  53   protected $_port = self::DEFAULT_PORT;
  54
  55   /**
  56    * The default timeout to use.
  57    *
  58    * @var int
  59    */
  60   protected $_timeout = self::DEFAULT_TIMEOUT;
  61
  62   /**
  63    * The prefix prepended to cache keys.
  64    *
  65    * If we are using the same memcache instance for multiple CiviCRM
  66    * installs, we must have a unique prefix for each install to prevent
  67    * the keys from clobbering each other.
  68    *
  69    * @var string
  70    */
  71   protected $_prefix = self::DEFAULT_PREFIX;
  72
  73   /**
  74    * The actual memcache object.
  75    *
  76    * @var resource
  77    */
  78   protected $_cache;
  79
  80   /**
  81    * Constructor.
  82    *
  83    * @param array $config
  84    *   An array of configuration params.
  85    *
  86    * @return \CRM_Utils_Cache_Memcache
  87    */
  88   public function __construct($config) {
  89     if (isset($config['host'])) {
  90       $this->_host = $config['host'];
  91     }
  92     if (isset($config['port'])) {
  93       $this->_port = $config['port'];
  94     }
  95     if (isset($config['timeout'])) {
  96       $this->_timeout = $config['timeout'];
  97     }
  98     if (isset($config['prefix'])) {
  99       $this->_prefix = $config['prefix'];
 100     }
 101
 102     $this->_cache = new Memcache();
 103
 104     if (!$this->_cache->connect($this->_host, $this->_port)) {
 105       // dont use fatal here since we can go in an infinite loop
 106       echo 'Could not connect to Memcached server';
 107       CRM_Utils_System::civiExit();
 108     }
 109   }
 110
 111   /**
 112    * @param $key
 113    * @param $value
 114    *
 115    * @return bool
 116    */
 117   public function set($key, &$value) {
 118     if (!$this->_cache->set($this->_prefix . $key, $value, FALSE, $this->_timeout)) {
 119       return FALSE;
 120     }
 121     return TRUE;
 122   }
 123
 124   /**
 125    * @param $key
 126    *
 127    * @return mixed
 128    */
 129   public function &get($key) {
 130     $result = $this->_cache->get($this->_prefix . $key);
 131     return $result;
 132   }
 133
 134   /**
 135    * @param $key
 136    *
 137    * @return mixed
 138    */
 139   public function delete($key) {
 140     return $this->_cache->delete($this->_prefix . $key);
 141   }
 142
 143   /**
 144    * @return mixed
 145    */
 146   public function flush() {
 147     return $this->_cache->flush();
 148   }
 149
 150 }