CRM/Utils/Cache/NoCache.php

   1 <?php
   2 /*
   3  +--------------------------------------------------------------------+
   4  | CiviCRM version 4.7                                                |
   5  +--------------------------------------------------------------------+
   6  | Copyright CiviCRM LLC (c) 2004-2018                                |
   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) 2004-2018
  32  */
  33 class CRM_Utils_Cache_NoCache implements CRM_Utils_Cache_Interface {
  34
  35   /**
  36    * We only need one instance of this object. So we use the singleton
  37    * pattern and cache the instance in this variable
  38    *
  39    * @var object
  40    */
  41   static private $_singleton = NULL;
  42
  43   /**
  44    * Constructor.
  45    *
  46    * @param array $config
  47    *   An array of configuration params.
  48    *
  49    * @return \CRM_Utils_Cache_NoCache
  50    */
  51   public function __construct($config) {
  52   }
  53
  54   /**
  55    * @param string $key
  56    * @param mixed $value
  57    *
  58    * @return bool
  59    */
  60   public function set($key, &$value) {
  61     return FALSE;
  62   }
  63
  64   /**
  65    * @param string $key
  66    *
  67    * @return null
  68    */
  69   public function get($key) {
  70     return NULL;
  71   }
  72
  73   /**
  74    * @param string $key
  75    *
  76    * @return bool
  77    */
  78   public function delete($key) {
  79     return FALSE;
  80   }
  81
  82   /**
  83    * @return bool
  84    */
  85   public function flush() {
  86     return FALSE;
  87   }
  88
  89 }