CRM/Utils/Cache/NoCache.php

   1 <?php
   2 /*
   3  +--------------------------------------------------------------------+
   4  | Copyright CiviCRM LLC. All rights reserved.                        |
   5  |                                                                    |
   6  | This work is published under the GNU AGPLv3 license with some      |
   7  | permitted exceptions and without any warranty. For full license    |
   8  | and copyright information, see https://civicrm.org/licensing       |
   9  +--------------------------------------------------------------------+
  10  */
  11
  12 /**
  13  *
  14  * @package CRM
  15  * @copyright CiviCRM LLC https://civicrm.org/licensing
  16  */
  17 class CRM_Utils_Cache_NoCache implements CRM_Utils_Cache_Interface {
  18
  19   // TODO Consider native implementation.
  20   use CRM_Utils_Cache_NaiveMultipleTrait;
  21   // TODO Native implementation
  22   use CRM_Utils_Cache_NaiveHasTrait;
  23
  24   /**
  25    * We only need one instance of this object. So we use the singleton
  26    * pattern and cache the instance in this variable
  27    *
  28    * @var object
  29    */
  30   static private $_singleton = NULL;
  31
  32   /**
  33    * Constructor.
  34    *
  35    * @param array $config
  36    *   An array of configuration params.
  37    *
  38    * @return \CRM_Utils_Cache_NoCache
  39    */
  40   public function __construct($config) {
  41   }
  42
  43   /**
  44    * @param string $key
  45    * @param mixed $value
  46    * @param null|int|\DateInterval $ttl
  47    *
  48    * @return bool
  49    */
  50   public function set($key, $value, $ttl = NULL) {
  51     return FALSE;
  52   }
  53
  54   /**
  55    * @param string $key
  56    * @param mixed $default
  57    *
  58    * @return null
  59    */
  60   public function get($key, $default = NULL) {
  61     return $default;
  62   }
  63
  64   /**
  65    * @param string $key
  66    *
  67    * @return bool
  68    */
  69   public function delete($key) {
  70     return FALSE;
  71   }
  72
  73   /**
  74    * @return bool
  75    */
  76   public function flush() {
  77     return FALSE;
  78   }
  79
  80   public function clear() {
  81     return $this->flush();
  82   }
  83
  84 }