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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
* @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__ );
} );
}
}
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