MediaWiki  master
BacklinkJobUtils.php
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1 <?php
25 
89  public static function partitionBacklinkJob( Job $job, $bSize, $cSize, $opts = [] ) {
90  $class = get_class( $job );
91  $title = $job->getTitle();
92  $params = $job->getParams();
93 
94  $backlinkCache = MediaWikiServices::getInstance()->getBacklinkCacheFactory()
95  ->getBacklinkCache( $title );
96  if ( isset( $params['pages'] ) || empty( $params['recursive'] ) ) {
97  $ranges = []; // sanity; this is a leaf node
98  $realBSize = 0;
99  wfWarn( __METHOD__ . " called on {$job->getType()} leaf job (explosive recursion)." );
100  } elseif ( isset( $params['range'] ) ) {
101  // This is a range job to trigger the insertion of partitioned/title jobs...
102  $ranges = $params['range']['subranges'];
103  $realBSize = $params['range']['batchSize'];
104  } else {
105  // This is a base job to trigger the insertion of partitioned jobs...
106  $ranges = $backlinkCache->partition( $params['table'], $bSize );
107  $realBSize = $bSize;
108  }
109 
110  $extraParams = $opts['params'] ?? [];
111 
112  $jobs = [];
113  // Combine the first range (of size $bSize) backlinks into leaf jobs
114  if ( isset( $ranges[0] ) ) {
115  list( $start, $end ) = $ranges[0];
116  $iter = $backlinkCache->getLinks( $params['table'], $start, $end );
117  $titles = iterator_to_array( $iter );
119  foreach ( array_chunk( $titles, $cSize ) as $titleBatch ) {
120  $pages = [];
121  foreach ( $titleBatch as $tl ) {
122  $pages[$tl->getArticleID()] = [ $tl->getNamespace(), $tl->getDBkey() ];
123  }
124  $jobs[] = new $class(
125  $title, // maintain parent job title
126  [ 'pages' => $pages ] + $extraParams
127  );
128  }
129  }
130  // Take all of the remaining ranges and build a partition job from it
131  if ( isset( $ranges[1] ) ) {
132  $jobs[] = new $class(
133  $title, // maintain parent job title
134  [
135  'recursive' => true,
136  'table' => $params['table'],
137  'range' => [
138  'start' => $ranges[1][0],
139  'end' => $ranges[count( $ranges ) - 1][1],
140  'batchSize' => $realBSize,
141  'subranges' => array_slice( $ranges, 1 )
142  ],
143  // Track how many times the base job divided for debugging
144  'division' => isset( $params['division'] )
145  ? ( $params['division'] + 1 )
146  : 1
147  ] + $extraParams
148  );
149  }
150 
151  return $jobs;
152  }
153 }
MediaWiki\MediaWikiServices
MediaWikiServices is the service locator for the application scope of MediaWiki.
Definition: MediaWikiServices.php:193
BacklinkJobUtils\partitionBacklinkJob
static partitionBacklinkJob(Job $job, $bSize, $cSize, $opts=[])
Break down $job into approximately ($bSize/$cSize) leaf jobs and a single partition job that covers t...
Definition: BacklinkJobUtils.php:89
Job
Class to both describe a background job and handle jobs.
Definition: Job.php:37
$title
$title
Definition: testCompression.php:38
BacklinkJobUtils
Class with Backlink related Job helper methods.
Definition: BacklinkJobUtils.php:53
Title
Represents a title within MediaWiki.
Definition: Title.php:48
$job
if(count( $args)< 1) $job
Definition: recompressTracked.php:49
wfWarn
wfWarn( $msg, $callerOffset=1, $level=E_USER_NOTICE)
Send a warning either to the debug log or in a PHP error depending on $wgDevelopmentWarnings.
Definition: GlobalFunctions.php:1043