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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 | use MediaWiki\Deferred\AutoCommitUpdate; |
21 | use MediaWiki\Deferred\DeferredUpdates; |
22 | use MediaWiki\MainConfigNames; |
23 | use MediaWiki\MediaWikiServices; |
24 | use Wikimedia\Rdbms\IDatabase; |
25 | |
26 | /** |
27 | * Helper for a Job that writes data derived from page content to the database. |
28 | * |
29 | * Used by RefreshLinksJob via LinksUpdate. |
30 | * |
31 | * @ingroup JobQueue |
32 | */ |
33 | class PurgeJobUtils { |
34 | /** |
35 | * Invalidate the cache of a list of pages from a single namespace. |
36 | * This is intended for use by subclasses. |
37 | * |
38 | * @param IDatabase $dbw |
39 | * @param int $namespace Namespace number |
40 | * @param string[] $dbkeys |
41 | */ |
42 | public static function invalidatePages( IDatabase $dbw, $namespace, array $dbkeys ) { |
43 | if ( $dbkeys === [] ) { |
44 | return; |
45 | } |
46 | $fname = __METHOD__; |
47 | |
48 | DeferredUpdates::addUpdate( new AutoCommitUpdate( |
49 | $dbw, |
50 | __METHOD__, |
51 | static function () use ( $dbw, $namespace, $dbkeys, $fname ) { |
52 | $services = MediaWikiServices::getInstance(); |
53 | $dbProvider = $services->getConnectionProvider(); |
54 | // Determine which pages need to be updated. |
55 | // This is necessary to prevent the job queue from smashing the DB with |
56 | // large numbers of concurrent invalidations of the same page. |
57 | $now = $dbw->timestamp(); |
58 | $ids = $dbw->newSelectQueryBuilder() |
59 | ->select( 'page_id' ) |
60 | ->from( 'page' ) |
61 | ->where( [ 'page_namespace' => $namespace ] ) |
62 | ->andWhere( [ 'page_title' => $dbkeys ] ) |
63 | ->andWhere( $dbw->expr( 'page_touched', '<', $now ) ) |
64 | ->caller( $fname )->fetchFieldValues(); |
65 | |
66 | if ( !$ids ) { |
67 | return; |
68 | } |
69 | |
70 | $batchSize = |
71 | $services->getMainConfig()->get( MainConfigNames::UpdateRowsPerQuery ); |
72 | $ticket = $dbProvider->getEmptyTransactionTicket( $fname ); |
73 | $idBatches = array_chunk( $ids, $batchSize ); |
74 | foreach ( $idBatches as $idBatch ) { |
75 | $dbw->newUpdateQueryBuilder() |
76 | ->update( 'page' ) |
77 | ->set( [ 'page_touched' => $now ] ) |
78 | ->where( [ 'page_id' => $idBatch ] ) |
79 | ->andWhere( $dbw->expr( 'page_touched', '<', $now ) ) // handle races |
80 | ->caller( $fname )->execute(); |
81 | if ( count( $idBatches ) > 1 ) { |
82 | $dbProvider->commitAndWaitForReplication( $fname, $ticket ); |
83 | } |
84 | } |
85 | } |
86 | ) ); |
87 | } |
88 | } |