maintenance/updateSearchIndex.inc

   1 <?php
   2 /**
   3  * @package MediaWiki
   4  * @subpackage Maintenance
   5  */
   6
   7 /** */
   8 function updateSearchIndex( $start, $end, $maxLockTime, $quiet ) {
   9         global $wgQuiet;
  10         global $wgDisableSearchUpdate;
  11
  12         $fname = "updateSearchIndex";
  13
  14         $wgQuiet = $quiet;
  15         $wgDisableSearchUpdate = false;
  16
  17         $dbw =& wfGetDB( DB_MASTER );
  18         $recentchanges = $dbw->tableName( 'recentchanges' );
  19
  20         output( "Updating searchindex between $start and $end\n" );
  21
  22         # Select entries from recentchanges which are on top and between the specified times
  23         $start = $dbw->strencode( $start );
  24         $end = $dbw->strencode( $end );
  25
  26         $sql = "SELECT rc_cur_id,rc_type,rc_moved_to_ns,rc_moved_to_title FROM $recentchanges
  27           WHERE rc_this_oldid=0 AND rc_timestamp BETWEEN '$start' AND '$end'";
  28         $res = $dbw->query( $sql, $fname );
  29
  30         # Lock searchindex
  31         if ( $maxLockTime ) {
  32                 output( "   --- Waiting for lock ---" );
  33                 lockSearchindex();
  34                 $lockTime = time();
  35                 output( "\n" );
  36         }
  37
  38         # Loop through the results and do a search update
  39         while ( $row = $dbw->fetchObject( $res ) ) {
  40                 # Allow reads to be processed
  41                 if ( $maxLockTime && time() > $lockTime + $maxLockTime ) {
  42                         output( "    --- Relocking ---" );
  43                         relockSearchindex();
  44                         $lockTime = time();
  45                         output( "\n" );
  46                 }
  47                 if ( $row->rc_type == RC_LOG ) {
  48                         continue;
  49                 } elseif ( $row->rc_type == RC_MOVE || $row->rc_type == RC_MOVE_OVER_REDIRECT ) {
  50                         # Rename searchindex entry
  51                         $titleObj = Title::makeTitle( $row->rc_moved_to_ns, $row->rc_moved_to_title );
  52                         $title = $titleObj->getPrefixedDBkey();
  53                         output( "$title..." );
  54                         $u = new SearchUpdate( $row->rc_cur_id, $title, false );
  55                         output( "\n" );
  56                 } else {
  57                         # Get cur row
  58                         $curRow = $dbw->selectRow( 'cur', array( 'cur_namespace', 'cur_title', 'cur_text' ),
  59                                 array( 'cur_id' => $row->rc_cur_id ), $fname, 'FOR UPDATE' );
  60                         if ( $curRow ) {
  61                                 $titleObj = Title::makeTitle( $curRow->cur_namespace, $curRow->cur_title );
  62                                 $title = $titleObj->getPrefixedDBkey();
  63                                 output( $title );
  64                                 # Update searchindex
  65                                 $u = new SearchUpdate( $row->rc_cur_id, $curRow->cur_title, $curRow->cur_text );
  66                                 $u->doUpdate();
  67                                 output( "\n" );
  68                         }
  69                 }
  70         }
  71
  72         # Unlock searchindex
  73         if ( $maxLockTime ) {
  74                 unlockSearchindex();
  75         }
  76         output( "Done\n" );
  77 }
  78
  79 function lockSearchindex( &$db ) {
  80         $dbw =& wfGetDB( DB_MASTER );
  81         extract( $dbw->tableNames( 'searchindex', 'cur', 'interwiki' ) );
  82         $dbw->query( "LOCK TABLES $searchindex LOW_PRIORITY WRITE, $cur READ, $interwiki READ" );
  83 }
  84
  85 function unlockSearchindex() {
  86         $dbw =& wfGetDB( DB_MASTER );
  87         $dbw->query( "UNLOCK TABLES" );
  88 }
  89
  90 # Unlock and lock again
  91 # Since the lock is low-priority, queued reads will be able to complete
  92 function relockSearchindex() {
  93         unlockSearchindex();
  94         lockSearchindex();
  95 }
  96
  97 function output( $text ) {
  98         global $wgQuiet;
  99         if ( !$wgQuiet ) {
 100                 print $text;
 101         }
 102 }
 103
 104 ?>