1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
<?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
*
* @file
* @ingroup Maintenance
*/
require_once __DIR__ . '/Maintenance.php';
/**
* Maintenance script that picks a database that has pending jobs.
*
* @ingroup Maintenance
*/
class nextJobDB extends Maintenance {
public function __construct() {
parent::__construct();
$this->mDescription = "Pick a database that has pending jobs";
$this->addOption( 'type', "Search by job type", false, true );
$this->addOption( 'types', "Space separated list of job types to search for", false, true );
}
public function execute() {
global $wgJobTypesExcludedFromDefaultQueue;
// job type required/picked
if ( $this->hasOption( 'types' ) ) {
$types = explode( ' ', $this->getOption( 'types' ) );
} elseif ( $this->hasOption( 'type' ) ) {
$types = array( $this->getOption( 'type' ) );
} else {
$types = false;
}
// Handle any required periodic queue maintenance
$this->executeReadyPeriodicTasks();
// Get all the queues with jobs in them
$pendingDBs = JobQueueAggregator::singleton()->getAllReadyWikiQueues();
if ( !count( $pendingDBs ) ) {
return; // no DBs with jobs or cache is both empty and locked
}
do {
$again = false;
$candidates = array(); // list of (type, db)
// Flatten the tree of candidates into a flat list so that a random
// item can be selected, weighing each queue (type/db tuple) equally.
foreach ( $pendingDBs as $type => $dbs ) {
if (
( is_array( $types ) && in_array( $type, $types ) ) ||
( $types === false && !in_array( $type, $wgJobTypesExcludedFromDefaultQueue ) )
) {
foreach ( $dbs as $db ) {
$candidates[] = array( $type, $db );
}
}
}
if ( !count( $candidates ) ) {
return; // no jobs for this type
}
list( $type, $db ) = $candidates[mt_rand( 0, count( $candidates ) - 1 )];
if ( JobQueueGroup::singleton( $db )->isQueueDeprioritized( $type ) ) {
$pendingDBs[$type] = array_diff( $pendingDBs[$type], array( $db ) );
$again = true;
}
} while ( $again );
if ( $this->hasOption( 'types' ) ) {
$this->output( $db . " " . $type . "\n" );
} else {
$this->output( $db . "\n" );
}
}
/**
* Do all ready periodic jobs for all databases every 5 minutes (and .1% of the time)
* @return integer
*/
private function executeReadyPeriodicTasks() {
global $wgLocalDatabases, $wgMemc;
$count = 0;
$memcKey = 'jobqueue:periodic:lasttime';
$timestamp = (int)$wgMemc->get( $memcKey ); // UNIX timestamp or 0
if ( ( time() - $timestamp ) > 300 || mt_rand( 0, 999 ) == 0 ) { // 5 minutes
if ( $wgMemc->add( "$memcKey:rebuild", 1, 1800 ) ) { // lock
foreach ( $wgLocalDatabases as $db ) {
$count += JobQueueGroup::singleton( $db )->executeReadyPeriodicTasks();
}
$wgMemc->set( $memcKey, time() );
$wgMemc->delete( "$memcKey:rebuild" ); // unlock
}
}
return $count;
}
}
$maintClass = "nextJobDb";
require_once RUN_MAINTENANCE_IF_MAIN;
|
