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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 | |
| 21 | use MediaWiki\MediaWikiServices; |
| 22 | |
| 23 | /** |
| 24 | * No-op job that does nothing. |
| 25 | * |
| 26 | * This is used for testing purposes, e.g. to measure overall system |
| 27 | * performance of the JobQueue system, lock contention, etc. |
| 28 | * |
| 29 | * This job can optionally recursively re-queue itself a number of times |
| 30 | * or spend a fixed amount of time idling in execution time. |
| 31 | * |
| 32 | * @par Example: |
| 33 | * Inserting a null job in the configured job queue: |
| 34 | * @code |
| 35 | * $ php maintenance/eval.php |
| 36 | * > $queue = MediaWikiServices::getInstance()->getJobQueueGroup(); |
| 37 | * > $job = new NullJob( [ 'lives' => 10 ] ); |
| 38 | * > $queue->push( $job ); |
| 39 | * @endcode |
| 40 | * |
| 41 | * You can confirm the job has been enqueued via maintenance/showJobs.php: |
| 42 | * |
| 43 | * @code |
| 44 | * $ php maintenance/showJobs.php --group |
| 45 | * null: 1 queue; 0 claimed (0 active, 0 abandoned) |
| 46 | * @endcode |
| 47 | * |
| 48 | * @ingroup JobQueue |
| 49 | */ |
| 50 | class NullJob extends Job implements GenericParameterJob { |
| 51 | /** |
| 52 | * @param array $params Job parameters (lives, usleep) |
| 53 | */ |
| 54 | public function __construct( array $params ) { |
| 55 | parent::__construct( 'null', $params ); |
| 56 | if ( !isset( $this->params['lives'] ) ) { |
| 57 | $this->params['lives'] = 1; |
| 58 | } |
| 59 | if ( !isset( $this->params['usleep'] ) ) { |
| 60 | $this->params['usleep'] = 0; |
| 61 | } |
| 62 | $this->removeDuplicates = !empty( $this->params['removeDuplicates'] ); |
| 63 | } |
| 64 | |
| 65 | public function run() { |
| 66 | if ( $this->params['usleep'] > 0 ) { |
| 67 | usleep( $this->params['usleep'] ); |
| 68 | } |
| 69 | if ( $this->params['lives'] > 1 ) { |
| 70 | $params = $this->params; |
| 71 | $params['lives']--; |
| 72 | $job = new self( $params ); |
| 73 | MediaWikiServices::getInstance()->getJobQueueGroup()->push( $job ); |
| 74 | } |
| 75 | |
| 76 | return true; |
| 77 | } |
| 78 | } |