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<?php /** * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * http://www.gnu.org/copyleft/gpl.html * * @file */ namespace MediaWiki\Linter; use MediaWiki\Config\ServiceOptions; use MediaWiki\WikiMap\WikiMap; use Wikimedia\ObjectCache\WANObjectCache; use Wikimedia\Rdbms\Database as MWDatabase; use Wikimedia\Stats\IBufferingStatsdDataFactory; /** * Lookup to find and cache the total amount of * lint errors in each category */ class TotalsLookup { public const CONSTRUCTOR_OPTIONS = [ 'LinterStatsdSampleFactor', ]; private ServiceOptions $options; private WANObjectCache $cache; private IBufferingStatsdDataFactory $statsdDataFactory; private CategoryManager $categoryManager; private Database $database; /** * @param ServiceOptions $options * @param WANObjectCache $cache * @param IBufferingStatsdDataFactory $statsdDataFactory * @param CategoryManager $categoryManager * @param Database $database */ public function __construct( ServiceOptions $options, WANObjectCache $cache, IBufferingStatsdDataFactory $statsdDataFactory, CategoryManager $categoryManager, Database $database ) { $options->assertRequiredOptions( self::CONSTRUCTOR_OPTIONS ); $this->options = $options; $this->cache = $cache; $this->statsdDataFactory = $statsdDataFactory; $this->categoryManager = $categoryManager; $this->database = $database; } /** * @param string $cat * @return string */ private function makeKey( $cat ) { return $this->cache->makeKey( 'linter', 'total', $cat ); } /** * Get the totals for every category in the database * * @return array */ public function getTotals(): array { $cats = $this->categoryManager->getVisibleCategories(); $fetchedTotals = false; $totals = []; foreach ( $cats as $cat ) { $totals[$cat] = $this->cache->getWithSetCallback( $this->makeKey( $cat ), WANObjectCache::TTL_INDEFINITE, function ( $oldValue, &$ttl, &$setOpts, $oldAsOf ) use ( $cat, &$fetchedTotals ) { $setOpts += MWDatabase::getCacheSetOptions( $this->database->getDBConnectionRef( DB_REPLICA ) ); if ( $fetchedTotals === false ) { $fetchedTotals = $this->database->getTotals(); } return $fetchedTotals[$cat]; }, [ 'checkKeys' => [ $this->cache->makeKey( 'linter', 'totals' ), $this->makeKey( $cat ), ], 'lockTSE' => 30, ] ); } return $totals; } /** * Send stats to statsd and update totals cache * * @param array $changes */ public function updateStats( array $changes ) { $linterStatsdSampleFactor = $this->options->get( 'LinterStatsdSampleFactor' ); if ( $linterStatsdSampleFactor === false ) { // Don't send to statsd, but update cache with $changes $raw = $changes['added']; foreach ( $changes['deleted'] as $cat => $count ) { if ( isset( $raw[$cat] ) ) { $raw[$cat] -= $count; } else { // Negative value $raw[$cat] = 0 - $count; } } foreach ( $raw as $cat => $count ) { if ( $count != 0 ) { // There was a change in counts, invalidate the cache $this->touchCategoryCache( $cat ); } } return; } elseif ( mt_rand( 1, $linterStatsdSampleFactor ) != 1 ) { return; } $totals = $this->database->getTotals(); $wiki = WikiMap::getCurrentWikiId(); $stats = $this->statsdDataFactory; foreach ( $totals as $name => $count ) { $stats->gauge( "linter.category.$name.$wiki", $count ); } $stats->gauge( "linter.totals.$wiki", array_sum( $totals ) ); $this->touchAllCategoriesCache(); } /** * Have a single category be recalculated * * @param string $cat category name */ public function touchCategoryCache( $cat ) { $this->cache->touchCheckKey( $this->makeKey( $cat ) ); } /** * Have all categories be recalculated */ public function touchAllCategoriesCache() { $this->cache->touchCheckKey( $this->cache->makeKey( 'linter', 'totals' ) ); } }
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