f72ae0f6e6
This is the preferred method as it enforces read-only mode for DB_REPLICA and handles LoadBalancer::reuseConnection() calls automatically. Change-Id: Iab9439ba8e0810fa14c302661ed7a3534f6bfc0d
113 lines
3.9 KiB
PHP
113 lines
3.9 KiB
PHP
<?php
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/**
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* User edit count incrementing.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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*/
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use Wikimedia\Assert\Assert;
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use MediaWiki\MediaWikiServices;
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/**
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* Handles increment the edit count for a given set of users
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*/
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class UserEditCountUpdate implements DeferrableUpdate, MergeableUpdate {
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/** @var array[] Map of (user ID => ('increment': int, 'instances': User[])) */
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private $infoByUser;
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/**
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* @param User $user
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* @param int $increment
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*/
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public function __construct( User $user, $increment ) {
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if ( !$user->getId() ) {
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throw new RuntimeException( "Got user ID of zero" );
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}
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$this->infoByUser = [
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$user->getId() => [ 'increment' => $increment, 'instances' => [ $user ] ]
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];
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}
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public function merge( MergeableUpdate $update ) {
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/** @var UserEditCountUpdate $update */
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Assert::parameterType( __CLASS__, $update, '$update' );
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foreach ( $update->infoByUser as $userId => $info ) {
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if ( !isset( $this->infoByUser[$userId] ) ) {
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$this->infoByUser[$userId] = [ 'increment' => 0, 'instances' => [] ];
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}
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// Merge the increment amount
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$this->infoByUser[$userId]['increment'] += $info['increment'];
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// Merge the list of User instances to update in doUpdate()
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foreach ( $info['instances'] as $user ) {
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if ( !in_array( $user, $this->infoByUser[$userId]['instances'], true ) ) {
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$this->infoByUser[$userId]['instances'][] = $user;
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}
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}
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}
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}
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/**
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* Purges the list of URLs passed to the constructor.
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*/
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public function doUpdate() {
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$lb = MediaWikiServices::getInstance()->getDBLoadBalancer();
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$dbw = $lb->getConnectionRef( DB_MASTER );
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$fname = __METHOD__;
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( new AutoCommitUpdate( $dbw, __METHOD__, function () use ( $lb, $dbw, $fname ) {
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foreach ( $this->infoByUser as $userId => $info ) {
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$dbw->update(
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'user',
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[ 'user_editcount=user_editcount+' . (int)$info['increment'] ],
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[ 'user_id' => $userId, 'user_editcount IS NOT NULL' ],
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$fname
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);
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/** @var User[] $affectedInstances */
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$affectedInstances = $info['instances'];
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// Lazy initialization check...
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if ( $dbw->affectedRows() == 0 ) {
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// The user_editcount is probably NULL (e.g. not initialized).
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// Since this update runs after the new revisions were committed,
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// wait for the replica DB to catch up so they will be counted.
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$dbr = $lb->getConnectionRef( DB_REPLICA );
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// If $dbr is actually the master DB, then clearing the snapshot
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// is harmless and waitForMasterPos() will just no-op.
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$dbr->flushSnapshot( $fname );
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$lb->waitForMasterPos( $dbr );
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$affectedInstances[0]->initEditCountInternal( $dbr );
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}
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$newCount = (int)$dbw->selectField(
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'user',
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'user_editcount',
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[ 'user_id' => $userId ],
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$fname
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);
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// Update the edit count in the instance caches. This is mostly useful
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// for maintenance scripts, where deferred updates might run immediately
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// and user instances might be reused for a long time.
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foreach ( $affectedInstances as $affectedInstance ) {
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$affectedInstance->setEditCountInternal( $newCount );
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}
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// Clear the edit count in user cache too
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$affectedInstances[0]->invalidateCache();
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}
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} ) )->doUpdate();
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}
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}
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