includes/libs/objectcache/EmptyBagOStuff.php

   1 <?php
   2 /**
   3  * Dummy object caching.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Cache
  22  */
  23
  24 /**
  25  * A BagOStuff object with no objects in it. Used to provide a no-op object to calling code.
  26  *
  27  * @ingroup Cache
  28  */
  29 class EmptyBagOStuff extends BagOStuff {
  30         protected function doGet( $key, $flags = 0 ) {
  31                 return false;
  32         }
  33
  34         public function set( $key, $value, $exp = 0, $flags = 0 ) {
  35                 return true;
  36         }
  37
  38         public function delete( $key ) {
  39                 return true;
  40         }
  41
  42         public function merge( $key, callable $callback, $exptime = 0, $attempts = 10, $flags = 0 ) {
  43                 return true; // faster
  44         }
  45 }