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1 | <?php |
2 | /** |
3 | * Base code for update jobs that put some secondary data extracted |
4 | * from article content into the database. |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation; either version 2 of the License, or |
9 | * (at your option) any later version. |
10 | * |
11 | * This program is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * GNU General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; if not, write to the Free Software Foundation, Inc., |
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
19 | * http://www.gnu.org/copyleft/gpl.html |
20 | * |
21 | * @file |
22 | */ |
23 | use MediaWiki\Deferred\AutoCommitUpdate; |
24 | use MediaWiki\Deferred\DeferredUpdates; |
25 | use MediaWiki\MainConfigNames; |
26 | use MediaWiki\MediaWikiServices; |
27 | use Wikimedia\Rdbms\IDatabase; |
28 | |
29 | class PurgeJobUtils { |
30 | /** |
31 | * Invalidate the cache of a list of pages from a single namespace. |
32 | * This is intended for use by subclasses. |
33 | * |
34 | * @param IDatabase $dbw |
35 | * @param int $namespace Namespace number |
36 | * @param string[] $dbkeys |
37 | */ |
38 | public static function invalidatePages( IDatabase $dbw, $namespace, array $dbkeys ) { |
39 | if ( $dbkeys === [] ) { |
40 | return; |
41 | } |
42 | $fname = __METHOD__; |
43 | |
44 | DeferredUpdates::addUpdate( new AutoCommitUpdate( |
45 | $dbw, |
46 | __METHOD__, |
47 | static function () use ( $dbw, $namespace, $dbkeys, $fname ) { |
48 | $services = MediaWikiServices::getInstance(); |
49 | $dbProvider = $services->getConnectionProvider(); |
50 | // Determine which pages need to be updated. |
51 | // This is necessary to prevent the job queue from smashing the DB with |
52 | // large numbers of concurrent invalidations of the same page. |
53 | $now = $dbw->timestamp(); |
54 | $ids = $dbw->newSelectQueryBuilder() |
55 | ->select( 'page_id' ) |
56 | ->from( 'page' ) |
57 | ->where( [ 'page_namespace' => $namespace ] ) |
58 | ->andWhere( [ 'page_title' => $dbkeys ] ) |
59 | ->andWhere( $dbw->expr( 'page_touched', '<', $now ) ) |
60 | ->caller( $fname )->fetchFieldValues(); |
61 | |
62 | if ( !$ids ) { |
63 | return; |
64 | } |
65 | |
66 | $batchSize = |
67 | $services->getMainConfig()->get( MainConfigNames::UpdateRowsPerQuery ); |
68 | $ticket = $dbProvider->getEmptyTransactionTicket( $fname ); |
69 | $idBatches = array_chunk( $ids, $batchSize ); |
70 | foreach ( $idBatches as $idBatch ) { |
71 | $dbw->newUpdateQueryBuilder() |
72 | ->update( 'page' ) |
73 | ->set( [ 'page_touched' => $now ] ) |
74 | ->where( [ 'page_id' => $idBatch ] ) |
75 | ->andWhere( $dbw->expr( 'page_touched', '<', $now ) ) // handle races |
76 | ->caller( $fname )->execute(); |
77 | if ( count( $idBatches ) > 1 ) { |
78 | $dbProvider->commitAndWaitForReplication( $fname, $ticket ); |
79 | } |
80 | } |
81 | } |
82 | ) ); |
83 | } |
84 | } |