X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/mediawiki.git/blobdiff_plain/d7967d5e4460e08b6b258307afbca0596b18a3dd..19e297c21b10b1b8a3acad5e73fc71dcb35db44a:/maintenance/nextJobDB.php

diff --git a/maintenance/nextJobDB.php b/maintenance/nextJobDB.php
index dfa8d028..8d8229e2 100644
--- a/maintenance/nextJobDB.php
+++ b/maintenance/nextJobDB.php
@@ -1,62 +1,103 @@
 <?php
-
-/*
+/**
  * Pick a database that has pending jobs
+ *
+ * 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
+ *
+ * @todo Make this work on PostgreSQL and maybe other database servers
+ * @ingroup Maintenance
  */
 
-$options = array( 'type'  );
-
-require_once( 'commandLine.inc' );
-
-$type = isset($options['type'])
-		? $options['type']
-		: false;
-
-$mckey = $type === false
-            ? "jobqueue:dbs"
-            : "jobqueue:dbs:$type";
-
-$pendingDBs = $wgMemc->get( $mckey );
-if ( !$pendingDBs ) {
-	$pendingDBs = array();
-	# Cross-reference DBs by master DB server
-	$dbsByMaster = array();
-	$defaultMaster = $wgAlternateMaster['DEFAULT'];
-	foreach ( $wgLocalDatabases as $db ) {
-		if ( isset( $wgAlternateMaster[$db] ) ) {
-			$dbsByMaster[$wgAlternateMaster[$db]][] = $db;
-		} else {
-			$dbsByMaster[$defaultMaster][] = $db;
-		}
+require_once( dirname( __FILE__ ) . '/Maintenance.php' );
+
+class nextJobDB extends Maintenance {
+	public function __construct() {
+		parent::__construct();
+		$this->mDescription = "Pick a database that has pending jobs";
+		$this->addOption( 'type', "The type of job to search for", false, true );
 	}
 
-	foreach ( $dbsByMaster as $master => $dbs ) {
-		$dbConn = new Database( $master, $wgDBuser, $wgDBpassword );
-		$stype = $dbConn->addQuotes($type);
+	public function execute() {
+		global $wgMemc;
+		$type = $this->getOption( 'type', false );
+		$mckey = $type === false
+					? "jobqueue:dbs"
+					: "jobqueue:dbs:$type";
+		$pendingDBs = $wgMemc->get( $mckey );
 
-		# Padding row for MySQL bug
-		$sql = "(SELECT '-------------------------------------------')";
-		foreach ( $dbs as $dbName ) {
-			if ( $sql != '' ) {
-				$sql .= ' UNION ';
-			}
-			if ($type === false)
-				$sql .= "(SELECT '$dbName' FROM `$dbName`.job LIMIT 1)";
-			else
-				$sql .= "(SELECT '$dbName' FROM `$dbName`.job WHERE job_cmd=$stype LIMIT 1)";
+		# If we didn't get it from the cache
+		if ( !$pendingDBs ) {
+			$pendingDBs = $this->getPendingDbs( $type );
+			$wgMemc->set( $mckey, $pendingDBs, 300 );
 		}
-		$res = $dbConn->query( $sql, 'nextJobDB.php' );
-		$row = $dbConn->fetchRow( $res ); // discard padding row
-		while ( $row = $dbConn->fetchRow( $res ) ) {
-			$pendingDBs[] = $row[0];
+		# If we've got a pending job in a db, display it.
+		if ( $pendingDBs ) {
+			$this->output( $pendingDBs[mt_rand( 0, count( $pendingDBs ) - 1 )] );
 		}
 	}
 
-	$wgMemc->set( $mckey, $pendingDBs, 300 );
-}
+	/**
+	 * Get all databases that have a pending job
+	 * @param $type String Job type
+	 * @return array
+	 */
+	private function getPendingDbs( $type ) {
+		global $wgLocalDatabases;
+		$pendingDBs = array();
+		# Cross-reference DBs by master DB server
+		$dbsByMaster = array();
+		foreach ( $wgLocalDatabases as $db ) {
+			$lb = wfGetLB( $db );
+			$dbsByMaster[$lb->getServerName( 0 )][] = $db;
+		}
 
-if ( $pendingDBs ) {
-	echo $pendingDBs[mt_rand(0, count( $pendingDBs ) - 1)];
-}
+		foreach ( $dbsByMaster as $dbs ) {
+			$dbConn = wfGetDB( DB_MASTER, array(), $dbs[0] );
+			$stype = $dbConn->addQuotes( $type );
 
+			# Padding row for MySQL bug
+			$sql = "(SELECT '-------------------------------------------' as db)";
+			foreach ( $dbs as $wikiId ) {
+				if ( $sql != '' ) {
+					$sql .= ' UNION ';
+				}
+
+				list( $dbName, $tablePrefix ) = wfSplitWikiID( $wikiId );
+				$dbConn->tablePrefix( $tablePrefix );
+				$jobTable = $dbConn->tableName( 'job' );
+
+				if ( $type === false )
+					$sql .= "(SELECT '$wikiId' as db FROM $dbName.$jobTable LIMIT 1)";
+				else
+					$sql .= "(SELECT '$wikiId' as db FROM $dbName.$jobTable WHERE job_cmd=$stype LIMIT 1)";
+			}
+			$res = $dbConn->query( $sql, __METHOD__ );
+			$first = true;
+			foreach ( $res as $row ) {
+				if ( $first ) {
+					// discard padding row
+					$first = false;
+					continue;
+				}
+				$pendingDBs[] = $row->db;
+			}
+		}
+		return $pendingDBs;
+	}
+}
 
+$maintClass = "nextJobDb";
+require_once( RUN_MAINTENANCE_IF_MAIN );