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| 1 | <?php |
| 2 | /** |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 16 | * http://www.gnu.org/copyleft/gpl.html |
| 17 | * |
| 18 | * @file |
| 19 | */ |
| 20 | namespace Wikimedia\ObjectCache; |
| 21 | |
| 22 | /** |
| 23 | * No-op implementation that stores nothing. |
| 24 | * |
| 25 | * Used as placeholder or fallback when disabling caching. |
| 26 | * |
| 27 | * This can be used in configuration via the CACHE_NONE constant. |
| 28 | * |
| 29 | * @ingroup Cache |
| 30 | */ |
| 31 | class EmptyBagOStuff extends MediumSpecificBagOStuff { |
| 32 | public function __construct( array $params = [] ) { |
| 33 | parent::__construct( $params ); |
| 34 | |
| 35 | $this->attrMap[self::ATTR_DURABILITY] = self::QOS_DURABILITY_NONE; |
| 36 | } |
| 37 | |
| 38 | protected function doGet( $key, $flags = 0, &$casToken = null ) { |
| 39 | $casToken = null; |
| 40 | |
| 41 | return false; |
| 42 | } |
| 43 | |
| 44 | protected function doSet( $key, $value, $exptime = 0, $flags = 0 ) { |
| 45 | return true; |
| 46 | } |
| 47 | |
| 48 | protected function doDelete( $key, $flags = 0 ) { |
| 49 | return true; |
| 50 | } |
| 51 | |
| 52 | protected function doAdd( $key, $value, $exptime = 0, $flags = 0 ) { |
| 53 | return true; |
| 54 | } |
| 55 | |
| 56 | protected function doIncrWithInit( $key, $exptime, $step, $init, $flags ) { |
| 57 | // faster |
| 58 | return $init; |
| 59 | } |
| 60 | |
| 61 | public function merge( $key, callable $callback, $exptime = 0, $attempts = 10, $flags = 0 ) { |
| 62 | // faster |
| 63 | return true; |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | /** @deprecated class alias since 1.43 */ |
| 68 | class_alias( EmptyBagOStuff::class, 'EmptyBagOStuff' ); |