maintenance/runJobs.php

   1 <?php
   2 /**
   3  * Run pending jobs.
   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 Maintenance
  22  */
  23
  24 require_once __DIR__ . '/Maintenance.php';
  25
  26 use MediaWiki\Logger\LoggerFactory;
  27
  28 /**
  29  * Maintenance script that runs pending jobs.
  30  *
  31  * @ingroup Maintenance
  32  */
  33 class RunJobs extends Maintenance {
  34         public function __construct() {
  35                 parent::__construct();
  36                 $this->addDescription( 'Run pending jobs' );
  37                 $this->addOption( 'maxjobs', 'Maximum number of jobs to run', false, true );
  38                 $this->addOption( 'maxtime', 'Maximum amount of wall-clock time', false, true );
  39                 $this->addOption( 'type', 'Type of job to run', false, true );
  40                 $this->addOption( 'procs', 'Number of processes to use', false, true );
  41                 $this->addOption( 'nothrottle', 'Ignore job throttling configuration', false, false );
  42                 $this->addOption( 'result', 'Set to JSON to print only a JSON response', false, true );
  43                 $this->addOption( 'wait', 'Wait for new jobs instead of exiting', false, false );
  44         }
  45
  46         public function memoryLimit() {
  47                 if ( $this->hasOption( 'memory-limit' ) ) {
  48                         return parent::memoryLimit();
  49                 }
  50
  51                 // Don't eat all memory on the machine if we get a bad job.
  52                 return "150M";
  53         }
  54
  55         public function execute() {
  56                 global $wgCommandLineMode;
  57
  58                 if ( $this->hasOption( 'procs' ) ) {
  59                         $procs = intval( $this->getOption( 'procs' ) );
  60                         if ( $procs < 1 || $procs > 1000 ) {
  61                                 $this->error( "Invalid argument to --procs", true );
  62                         } elseif ( $procs != 1 ) {
  63                                 $fc = new ForkController( $procs );
  64                                 if ( $fc->start() != 'child' ) {
  65                                         exit( 0 );
  66                                 }
  67                         }
  68                 }
  69
  70                 $outputJSON = ( $this->getOption( 'result' ) === 'json' );
  71                 $wait = $this->hasOption( 'wait' );
  72
  73                 // Enable DBO_TRX for atomicity; JobRunner manages transactions
  74                 // and works well in web server mode already (@TODO: this is a hack)
  75                 $wgCommandLineMode = false;
  76
  77                 $runner = new JobRunner( LoggerFactory::getInstance( 'runJobs' ) );
  78                 if ( !$outputJSON ) {
  79                         $runner->setDebugHandler( [ $this, 'debugInternal' ] );
  80                 }
  81
  82                 $type = $this->getOption( 'type', false );
  83                 $maxJobs = $this->getOption( 'maxjobs', false );
  84                 $maxTime = $this->getOption( 'maxtime', false );
  85                 $throttle = !$this->hasOption( 'nothrottle' );
  86
  87                 while ( true ) {
  88                         $response = $runner->run( [
  89                                 'type'     => $type,
  90                                 'maxJobs'  => $maxJobs,
  91                                 'maxTime'  => $maxTime,
  92                                 'throttle' => $throttle,
  93                         ] );
  94
  95                         if ( $outputJSON ) {
  96                                 $this->output( FormatJson::encode( $response, true ) );
  97                         }
  98
  99                         if (
 100                                 !$wait ||
 101                                 $response['reached'] === 'time-limit' ||
 102                                 $response['reached'] === 'job-limit' ||
 103                                 $response['reached'] === 'memory-limit'
 104                         ) {
 105                                 break;
 106                         }
 107
 108                         if ( $maxJobs !== false ) {
 109                                 $maxJobs -= count( $response['jobs'] );
 110                         }
 111
 112                         sleep( 1 );
 113                 }
 114
 115                 $wgCommandLineMode = true;
 116         }
 117
 118         /**
 119          * @param string $s
 120          */
 121         public function debugInternal( $s ) {
 122                 $this->output( $s );
 123         }
 124 }
 125
 126 $maintClass = "RunJobs";
 127 require_once RUN_MAINTENANCE_IF_MAIN;