Add tests for parser tag hooks.

[lhc/web/wiklou.git] / maintenance / nextJobDB.php

diff --git a/maintenance/nextJobDB.php b/maintenance/nextJobDB.php
index f67b026..7f6aa40 100644 (file)
--- a/maintenance/nextJobDB.php
+++ b/maintenance/nextJobDB.php
@@ -1,65 +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
+ */
 
-$user = 'wikiuser';
-$password = `/home/wikipedia/bin/wikiuser_pass`;
-$availableDBs = array_map( 'trim', file( "/home/wikipedia/common/pmtpa.dblist" ) );
-shuffle( $availableDBs );
+require_once( dirname( __FILE__ ) . '/Maintenance.php' );
 
-$dbs = array();
+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 );
+       }
 
-# Connect to enwiki
-mysql_connect( 'db4', $user, $password ) || myerror();
-mysql_select_db( 'enwiki' ) || myerror();
-( $res = mysql_query( 'SELECT 1 FROM job LIMIT 1' ) ) || myerror();
-$enwikiHasJobs = ( mysql_num_rows( $res ) != 0 );
-mysql_free_result( $res );
-mysql_close();
+       public function execute() {
+               global $wgMemc;
+               $type = $this->getOption( 'type', false );
+               $mckey = $type === false
+                                       ? "jobqueue:dbs"
+                                       : "jobqueue:dbs:$type";
+               $pendingDBs = $wgMemc->get( $mckey );
 
+               # If we didn't get it from the cache
+               if ( !$pendingDBs ) {
+                       $pendingDBs = $this->getPendingDbs( $type );
+                       $wgMemc->set( $mckey, $pendingDBs, 300 );
+               }
+               # If we've got a pending job in a db, display it.
+               if ( $pendingDBs ) {
+                       $this->output( $pendingDBs[mt_rand( 0, count( $pendingDBs ) - 1 )] );
+               }
+       }
 
-# Now try the rest
-mysql_connect( 'ixia', $user, $password ) || myerror();
+       /**
+        * 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;
+               }
 
-$sql = "(SELECT '-------------------------------------------')";
-foreach ( $availableDBs as $db ) {
-       if ( $db == 'enwiki' ) {
-               continue;
-       }
-       if ( $sql != '' ) {
-               $sql .= ' UNION ';
-       }
-       $sql .= "(SELECT '$db' FROM `$db`.job)";
-}
-$sql .= ' LIMIT 1,1';
-( $res = mysql_query( $sql ) ) || myerror();
-$row = mysql_fetch_row( $res );
-if ( $row ) {
-       $db = $row[0];
-} else {
-       $db = false;
-}
+               foreach ( $dbsByMaster as $dbs ) {
+                       $dbConn = wfGetDB( DB_MASTER, array(), $dbs[0] );
+                       $stype = $dbConn->addQuotes( $type );
 
-mysql_free_result( $res );
-mysql_close();
+                       # 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 ( $enwikiHasJobs ) {
-       if ( $db ) {
-               # Choose enwiki with arbitrary constant probability
-               if ( mt_rand( 0, 4 ) == 0 ) {
-                       $db = 'enwiki';
+                               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;
+                       }
                }
-       } else {
-               $db = 'enwiki';
+               return $pendingDBs;
        }
 }
 
-if ( $db ) {
-       echo $db;
-}
-
-function myerror() {
-       $f = fopen( 'php://stderr', 'w' );
-       fwrite( $f, mysql_error() . "\n" );
-       exit(1);
-}
-?>
+$maintClass = "nextJobDb";
+require_once( DO_MAINTENANCE );