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<?php
/**
* Update for cached special pages.
* Run this script periodically if you have miser mode enabled.
*
* 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
* @ingroup Maintenance
*/
// @codeCoverageIgnoreStart
require_once __DIR__ . '/Maintenance.php';
// @codeCoverageIgnoreEnd
use MediaWiki\MainConfigNames;
use MediaWiki\Maintenance\Maintenance;
use MediaWiki\SpecialPage\QueryPage;
use Wikimedia\Rdbms\IDatabase;
/**
* Maintenance script to update cached special pages.
*
* @ingroup Maintenance
*/
class UpdateSpecialPages extends Maintenance {
public function __construct() {
parent::__construct();
$this->addOption( 'list', 'List special page names' );
$this->addOption( 'only', 'Only update "page"; case sensitive, ' .
'check correct case by calling this script with --list. ' .
'Ex: --only=BrokenRedirects', false, true );
$this->addOption( 'override', 'Also update pages that have updates disabled' );
}
public function execute() {
$dbw = $this->getPrimaryDB();
$config = $this->getConfig();
$specialPageFactory = $this->getServiceContainer()->getSpecialPageFactory();
$this->doSpecialPageCacheUpdates( $dbw );
$queryCacheLimit = (int)$config->get( MainConfigNames::QueryCacheLimit );
$disabledQueryPages = QueryPage::getDisabledQueryPages( $config );
foreach ( QueryPage::getPages() as $page ) {
[ , $special ] = $page;
$limit = $page[2] ?? $queryCacheLimit;
# --list : just show the name of pages
if ( $this->hasOption( 'list' ) ) {
$this->output( "$special [QueryPage]\n" );
continue;
}
if ( !$this->hasOption( 'override' )
&& isset( $disabledQueryPages[$special] )
) {
$this->output( sprintf( "%-30s [QueryPage] disabled\n", $special ) );
continue;
}
$specialObj = $specialPageFactory->getPage( $special );
if ( !$specialObj ) {
$this->output( "No such special page: $special\n" );
return;
}
if ( $specialObj instanceof QueryPage ) {
$queryPage = $specialObj;
} else {
$class = get_class( $specialObj );
$this->fatalError( "$class is not an instance of QueryPage.\n" );
}
if ( !$this->hasOption( 'only' ) || $this->getOption( 'only' ) === $queryPage->getName() ) {
$this->output( sprintf( '%-30s [QueryPage] ', $special ) );
if ( $queryPage->isExpensive() ) {
$t1 = microtime( true );
# Do the query
$num = $queryPage->recache( $limit );
$t2 = microtime( true );
if ( $num === false ) {
$this->output( "FAILED: database error\n" );
} else {
$this->output( "got $num rows in " );
$this->outputElapsedTime( $t2 - $t1 );
}
# Reopen any connections that have closed
$this->reopenAndWaitForReplicas();
} else {
// Check if this page was expensive before and now cheap
$cached = $queryPage->getCachedTimestamp();
if ( $cached ) {
$queryPage->deleteAllCachedData();
$this->reopenAndWaitForReplicas();
$this->output( "cheap, but deleted cached data\n" );
} else {
$this->output( "cheap, skipped\n" );
}
}
if ( $this->hasOption( 'only' ) ) {
break;
}
}
}
}
/**
* Re-open any closed db connection, and wait for replicas
*
* Queries that take a really long time, might cause the
* mysql connection to "go away"
*/
private function reopenAndWaitForReplicas() {
$lbFactory = $this->getServiceContainer()->getDBLoadBalancerFactory();
$lb = $lbFactory->getMainLB();
if ( !$lb->pingAll() ) {
// We don't want the tests to sleep for 10 seconds, so mark this as ignored because there is no reason to
// test it.
// @codeCoverageIgnoreStart
$this->output( "\n" );
do {
$this->error( "Connection failed, reconnecting in 10 seconds..." );
sleep( 10 );
$this->waitForReplication();
} while ( !$lb->pingAll() );
$this->output( "Reconnected\n\n" );
// @codeCoverageIgnoreEnd
}
$this->waitForReplication();
}
public function doSpecialPageCacheUpdates( IDatabase $dbw ) {
foreach ( $this->getConfig()->get( MainConfigNames::SpecialPageCacheUpdates ) as $special => $call ) {
# --list : just show the name of pages
if ( $this->hasOption( 'list' ) ) {
$this->output( "$special [callback]\n" );
continue;
}
if ( !$this->hasOption( 'only' ) || $this->getOption( 'only' ) === $special ) {
$this->output( sprintf( '%-30s [callback] ', $special ) );
if ( !is_callable( $call ) ) {
$this->error( "Uncallable function $call!" );
continue;
}
$t1 = microtime( true );
$call( $dbw );
$t2 = microtime( true );
$this->output( "completed in " );
$this->outputElapsedTime( $t2 - $t1 );
# Wait for the replica DB to catch up
$this->reopenAndWaitForReplicas();
}
}
}
/**
* Outputs the time that was elapsed to update the cache update for
* a script.
*
* @param float $elapsed
* @return void
*/
private function outputElapsedTime( float $elapsed ) {
$hours = intval( $elapsed / 3600 );
$minutes = intval( (int)$elapsed % 3600 / 60 );
$seconds = $elapsed - $hours * 3600 - $minutes * 60;
if ( $hours ) {
$this->output( $hours . 'h ' );
}
if ( $minutes ) {
$this->output( $minutes . 'm ' );
}
$this->output( sprintf( "%.2fs\n", $seconds ) );
}
}
// @codeCoverageIgnoreStart
$maintClass = UpdateSpecialPages::class;
require_once RUN_MAINTENANCE_IF_MAIN;
// @codeCoverageIgnoreEnd