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Diffstat (limited to 'includes/jobqueue/jobs/RecentChangesUpdateJob.php')
| -rw-r--r-- | includes/jobqueue/jobs/RecentChangesUpdateJob.php | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/includes/jobqueue/jobs/RecentChangesUpdateJob.php b/includes/jobqueue/jobs/RecentChangesUpdateJob.php new file mode 100644 index 00000000..cc04595d --- /dev/null +++ b/includes/jobqueue/jobs/RecentChangesUpdateJob.php @@ -0,0 +1,223 @@ +<?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 + * @author Aaron Schulz + * @ingroup JobQueue + */ + +/** + * Job for pruning recent changes + * + * @ingroup JobQueue + * @since 1.25 + */ +class RecentChangesUpdateJob extends Job { + function __construct( $title, $params ) { + parent::__construct( 'recentChangesUpdate', $title, $params ); + + if ( !isset( $params['type'] ) ) { + throw new Exception( "Missing 'type' parameter." ); + } + + $this->removeDuplicates = true; + } + + /** + * @return RecentChangesUpdateJob + */ + final public static function newPurgeJob() { + return new self( + SpecialPage::getTitleFor( 'Recentchanges' ), array( 'type' => 'purge' ) + ); + } + + /** + * @return RecentChangesUpdateJob + * @since 1.26 + */ + final public static function newCacheUpdateJob() { + return new self( + SpecialPage::getTitleFor( 'Recentchanges' ), array( 'type' => 'cacheUpdate' ) + ); + } + + public function run() { + if ( $this->params['type'] === 'purge' ) { + $this->purgeExpiredRows(); + } elseif ( $this->params['type'] === 'cacheUpdate' ) { + $this->updateActiveUsers(); + } else { + throw new InvalidArgumentException( + "Invalid 'type' parameter '{$this->params['type']}'." ); + } + + return true; + } + + protected function purgeExpiredRows() { + global $wgRCMaxAge; + + $lockKey = wfWikiID() . ':recentchanges-prune'; + + $dbw = wfGetDB( DB_MASTER ); + if ( !$dbw->lock( $lockKey, __METHOD__, 1 ) ) { + return; // already in progress + } + $batchSize = 100; // Avoid slave lag + + $cutoff = $dbw->timestamp( time() - $wgRCMaxAge ); + do { + $rcIds = $dbw->selectFieldValues( 'recentchanges', + 'rc_id', + array( 'rc_timestamp < ' . $dbw->addQuotes( $cutoff ) ), + __METHOD__, + array( 'LIMIT' => $batchSize ) + ); + if ( $rcIds ) { + $dbw->delete( 'recentchanges', array( 'rc_id' => $rcIds ), __METHOD__ ); + } + // Commit in chunks to avoid slave lag + $dbw->commit( __METHOD__, 'flush' ); + + if ( count( $rcIds ) === $batchSize ) { + // There might be more, so try waiting for slaves + if ( !wfWaitForSlaves( null, false, false, /* $timeout = */ 3 ) ) { + // Another job will continue anyway + break; + } + } + } while ( $rcIds ); + + $dbw->unlock( $lockKey, __METHOD__ ); + } + + protected function updateActiveUsers() { + global $wgActiveUserDays; + + // Users that made edits at least this many days ago are "active" + $days = $wgActiveUserDays; + // Pull in the full window of active users in this update + $window = $wgActiveUserDays * 86400; + + $dbw = wfGetDB( DB_MASTER ); + // JobRunner uses DBO_TRX, but doesn't call begin/commit itself; + // onTransactionIdle() will run immediately since there is no trx. + $dbw->onTransactionIdle( function() use ( $dbw, $days, $window ) { + // Avoid disconnect/ping() cycle that makes locks fall off + $dbw->setSessionOptions( array( 'connTimeout' => 900 ) ); + + $lockKey = wfWikiID() . '-activeusers'; + if ( !$dbw->lock( $lockKey, __METHOD__, 1 ) ) { + return false; // exclusive update (avoids duplicate entries) + } + + $nowUnix = time(); + // Get the last-updated timestamp for the cache + $cTime = $dbw->selectField( 'querycache_info', + 'qci_timestamp', + array( 'qci_type' => 'activeusers' ) + ); + $cTimeUnix = $cTime ? wfTimestamp( TS_UNIX, $cTime ) : 1; + + // Pick the date range to fetch from. This is normally from the last + // update to till the present time, but has a limited window for sanity. + // If the window is limited, multiple runs are need to fully populate it. + $sTimestamp = max( $cTimeUnix, $nowUnix - $days * 86400 ); + $eTimestamp = min( $sTimestamp + $window, $nowUnix ); + + // Get all the users active since the last update + $res = $dbw->select( + array( 'recentchanges' ), + array( 'rc_user_text', 'lastedittime' => 'MAX(rc_timestamp)' ), + array( + 'rc_user > 0', // actual accounts + 'rc_type != ' . $dbw->addQuotes( RC_EXTERNAL ), // no wikidata + 'rc_log_type IS NULL OR rc_log_type != ' . $dbw->addQuotes( 'newusers' ), + 'rc_timestamp >= ' . $dbw->addQuotes( $dbw->timestamp( $sTimestamp ) ), + 'rc_timestamp <= ' . $dbw->addQuotes( $dbw->timestamp( $eTimestamp ) ) + ), + __METHOD__, + array( + 'GROUP BY' => array( 'rc_user_text' ), + 'ORDER BY' => 'NULL' // avoid filesort + ) + ); + $names = array(); + foreach ( $res as $row ) { + $names[$row->rc_user_text] = $row->lastedittime; + } + + // Rotate out users that have not edited in too long (according to old data set) + $dbw->delete( 'querycachetwo', + array( + 'qcc_type' => 'activeusers', + 'qcc_value < ' . $dbw->addQuotes( $nowUnix - $days * 86400 ) // TS_UNIX + ), + __METHOD__ + ); + + // Find which of the recently active users are already accounted for + if ( count( $names ) ) { + $res = $dbw->select( 'querycachetwo', + array( 'user_name' => 'qcc_title' ), + array( + 'qcc_type' => 'activeusers', + 'qcc_namespace' => NS_USER, + 'qcc_title' => array_keys( $names ) ), + __METHOD__ + ); + foreach ( $res as $row ) { + unset( $names[$row->user_name] ); + } + } + + // Insert the users that need to be added to the list + if ( count( $names ) ) { + $newRows = array(); + foreach ( $names as $name => $lastEditTime ) { + $newRows[] = array( + 'qcc_type' => 'activeusers', + 'qcc_namespace' => NS_USER, + 'qcc_title' => $name, + 'qcc_value' => wfTimestamp( TS_UNIX, $lastEditTime ), + 'qcc_namespacetwo' => 0, // unused + 'qcc_titletwo' => '' // unused + ); + } + foreach ( array_chunk( $newRows, 500 ) as $rowBatch ) { + $dbw->insert( 'querycachetwo', $rowBatch, __METHOD__ ); + wfWaitForSlaves(); + } + } + + // If a transaction was already started, it might have an old + // snapshot, so kludge the timestamp range back as needed. + $asOfTimestamp = min( $eTimestamp, (int)$dbw->trxTimestamp() ); + + // Touch the data freshness timestamp + $dbw->replace( 'querycache_info', + array( 'qci_type' ), + array( 'qci_type' => 'activeusers', + 'qci_timestamp' => $dbw->timestamp( $asOfTimestamp ) ), // not always $now + __METHOD__ + ); + + $dbw->unlock( $lockKey, __METHOD__ ); + } ); + } +} |