wikimedia / mediawiki

maintenance/updateSpecialPages.php

<?php

For compatibility and reusability of your code, PSR1 recommends that a file should introduce either new symbols (like classes, functions, etc.) or have side-effects (like outputting something, or including other files), but not both at the same time. The first symbol is defined on line 32 and the first side effect is on line 25.

/**
 * 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
 */

require_once __DIR__ . '/Maintenance.php';

/**
 * 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() {
		global $wgQueryCacheLimit, $wgDisableQueryPageUpdate;

		$dbw = $this->getDB( DB_MASTER );

		$this->doSpecialPageCacheUpdates( $dbw );

		foreach ( QueryPage::getPages() as $page ) {
			list( $class, $special ) = $page;
			$limit = isset( $page[2] ) ? $page[2] : null;

			# --list : just show the name of pages
			if ( $this->hasOption( 'list' ) ) {
				$this->output( "$special [QueryPage]\n" );
				continue;
			}

			if ( !$this->hasOption( 'override' )
				&& $wgDisableQueryPageUpdate && in_array( $special, $wgDisableQueryPageUpdate )
			) {
				$this->output( sprintf( "%-30s [QueryPage] disabled\n", $special ) );
				continue;
			}

			$specialObj = SpecialPageFactory::getPage( $special );
			if ( !$specialObj ) {
				$this->output( "No such special page: $special\n" );
				exit;

The method execute() contains an exit expression.

			}
			if ( $specialObj instanceof QueryPage ) {
				$queryPage = $specialObj;
			} else {
				$class = get_class( $specialObj );
				$this->error( "$class is not an instance of QueryPage.\n", 1 );
				die;

The method execute() contains an exit expression.

			}

			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 === null ? $wgQueryCacheLimit : $limit );
					$t2 = microtime( true );
					if ( $num === false ) {
						$this->output( "FAILED: database error\n" );
					} else {
						$this->output( "got $num rows in " );

						$elapsed = $t2 - $t1;
						$hours = intval( $elapsed / 3600 );
						$minutes = intval( $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 ) );
					}
					# Reopen any connections that have closed
					if ( !wfGetLB()->pingAll() ) {
						$this->output( "\n" );
						do {
							$this->error( "Connection failed, reconnecting in 10 seconds..." );
							sleep( 10 );
						} while ( !wfGetLB()->pingAll() );
						$this->output( "Reconnected\n\n" );
					}
					# Wait for the replica DB to catch up
					wfWaitForSlaves();
				} else {
					$this->output( "cheap, skipped\n" );
				}
				if ( $this->hasOption( 'only' ) ) {
					break;
				}
			}
		}
	}

	public function doSpecialPageCacheUpdates( $dbw ) {
		global $wgSpecialPageCacheUpdates;

		foreach ( $wgSpecialPageCacheUpdates 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 ) {
				if ( !is_callable( $call ) ) {
					$this->error( "Uncallable function $call!" );
					continue;
				}
				$this->output( sprintf( '%-30s [callback] ', $special ) );
				$t1 = microtime( true );
				call_user_func( $call, $dbw );
				$t2 = microtime( true );

				$this->output( "completed in " );
				$elapsed = $t2 - $t1;
				$hours = intval( $elapsed / 3600 );
				$minutes = intval( $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 ) );
				# Wait for the replica DB to catch up
				wfWaitForSlaves();
			}
		}
	}
}

$maintClass = "UpdateSpecialPages";
require_once RUN_MAINTENANCE_IF_MAIN;