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
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
<?php
/**
* Static accessor class for site_stats and related things
*/
class SiteStats {
static $row, $loaded = false;
static $admins, $jobs;
static $pageCount = array();
static function recache() {
self::load( true );
}
static function load( $recache = false ) {
if ( self::$loaded && !$recache ) {
return;
}
self::$row = self::loadAndLazyInit();
# This code is somewhat schema-agnostic, because I'm changing it in a minor release -- TS
if ( !isset( self::$row->ss_total_pages ) && self::$row->ss_total_pages == -1 ) {
# Update schema
$u = new SiteStatsUpdate( 0, 0, 0 );
$u->doUpdate();
$dbr = wfGetDB( DB_SLAVE );
self::$row = $dbr->selectRow( 'site_stats', '*', false, __METHOD__ );
}
self::$loaded = true;
}
static function loadAndLazyInit() {
wfDebug( __METHOD__ . ": reading site_stats from slave\n" );
$row = self::doLoad( wfGetDB( DB_SLAVE ) );
if( !self::isSane( $row ) ) {
// Might have just been initialized during this request? Underflow?
wfDebug( __METHOD__ . ": site_stats damaged or missing on slave\n" );
$row = self::doLoad( wfGetDB( DB_MASTER ) );
}
if( !self::isSane( $row ) ) {
// Normally the site_stats table is initialized at install time.
// Some manual construction scenarios may leave the table empty or
// broken, however, for instance when importing from a dump into a
// clean schema with mwdumper.
wfDebug( __METHOD__ . ": initializing damaged or missing site_stats\n" );
global $IP;
require_once "$IP/maintenance/initStats.inc";
ob_start();
wfInitStats();
ob_end_clean();
$row = self::doLoad( wfGetDB( DB_MASTER ) );
}
if( !self::isSane( $row ) ) {
wfDebug( __METHOD__ . ": site_stats persistently nonsensical o_O\n" );
}
return $row;
}
static function doLoad( $db ) {
return $db->selectRow( 'site_stats', '*', false, __METHOD__ );
}
static function views() {
self::load();
return self::$row->ss_total_views;
}
static function edits() {
self::load();
return self::$row->ss_total_edits;
}
static function articles() {
self::load();
return self::$row->ss_good_articles;
}
static function pages() {
self::load();
return self::$row->ss_total_pages;
}
static function users() {
self::load();
return self::$row->ss_users;
}
static function images() {
self::load();
return self::$row->ss_images;
}
static function admins() {
if ( !isset( self::$admins ) ) {
$dbr = wfGetDB( DB_SLAVE );
self::$admins = $dbr->selectField( 'user_groups', 'COUNT(*)', array( 'ug_group' => 'sysop' ), __METHOD__ );
}
return self::$admins;
}
static function jobs() {
if ( !isset( self::$jobs ) ) {
$dbr = wfGetDB( DB_SLAVE );
self::$jobs = $dbr->estimateRowCount('job');
/* Zero rows still do single row read for row that doesn't exist, but people are annoyed by that */
if (self::$jobs == 1) {
self::$jobs = 0;
}
}
return self::$jobs;
}
static function pagesInNs( $ns ) {
wfProfileIn( __METHOD__ );
if( !isset( self::$pageCount[$ns] ) ) {
$dbr = wfGetDB( DB_SLAVE );
$pageCount[$ns] = (int)$dbr->selectField( 'page', 'COUNT(*)', array( 'page_namespace' => $ns ), __METHOD__ );
}
wfProfileOut( __METHOD__ );
return $pageCount[$ns];
}
/** Is the provided row of site stats sane, or should it be regenerated? */
private static function isSane( $row ) {
if(
$row === false
or $row->ss_total_pages < $row->ss_good_articles
or $row->ss_total_edits < $row->ss_total_pages
or $row->ss_users < $row->ss_admins
) {
return false;
}
// Now check for underflow/overflow
foreach( array( 'total_views', 'total_edits', 'good_articles',
'total_pages', 'users', 'admins', 'images' ) as $member ) {
if(
$row->{"ss_$member"} > 2000000000
or $row->{"ss_$member"} < 0
) {
return false;
}
}
return true;
}
}
/**
*
*/
class SiteStatsUpdate {
var $mViews, $mEdits, $mGood, $mPages, $mUsers;
function __construct( $views, $edits, $good, $pages = 0, $users = 0 ) {
$this->mViews = $views;
$this->mEdits = $edits;
$this->mGood = $good;
$this->mPages = $pages;
$this->mUsers = $users;
}
function appendUpdate( &$sql, $field, $delta ) {
if ( $delta ) {
if ( $sql ) {
$sql .= ',';
}
if ( $delta < 0 ) {
$sql .= "$field=$field-1";
} else {
$sql .= "$field=$field+1";
}
}
}
function doUpdate() {
$fname = 'SiteStatsUpdate::doUpdate';
$dbw = wfGetDB( DB_MASTER );
# First retrieve the row just to find out which schema we're in
$row = $dbw->selectRow( 'site_stats', '*', false, $fname );
$updates = '';
$this->appendUpdate( $updates, 'ss_total_views', $this->mViews );
$this->appendUpdate( $updates, 'ss_total_edits', $this->mEdits );
$this->appendUpdate( $updates, 'ss_good_articles', $this->mGood );
if ( isset( $row->ss_total_pages ) ) {
# Update schema if required
if ( $row->ss_total_pages == -1 && !$this->mViews ) {
$dbr = wfGetDB( DB_SLAVE, array( 'SpecialStatistics', 'vslow') );
list( $page, $user ) = $dbr->tableNamesN( 'page', 'user' );
$sql = "SELECT COUNT(page_namespace) AS total FROM $page";
$res = $dbr->query( $sql, $fname );
$pageRow = $dbr->fetchObject( $res );
$pages = $pageRow->total + $this->mPages;
$sql = "SELECT COUNT(user_id) AS total FROM $user";
$res = $dbr->query( $sql, $fname );
$userRow = $dbr->fetchObject( $res );
$users = $userRow->total + $this->mUsers;
if ( $updates ) {
$updates .= ',';
}
$updates .= "ss_total_pages=$pages, ss_users=$users";
} else {
$this->appendUpdate( $updates, 'ss_total_pages', $this->mPages );
$this->appendUpdate( $updates, 'ss_users', $this->mUsers );
}
}
if ( $updates ) {
$site_stats = $dbw->tableName( 'site_stats' );
$sql = $dbw->limitResultForUpdate("UPDATE $site_stats SET $updates", 1);
$dbw->begin();
$dbw->query( $sql, $fname );
$dbw->commit();
}
/*
global $wgDBname, $wgTitle;
if ( $this->mGood && $wgDBname == 'enwiki' ) {
$good = $dbw->selectField( 'site_stats', 'ss_good_articles', '', $fname );
error_log( $good . ' ' . $wgTitle->getPrefixedDBkey() . "\n", 3, '/home/wikipedia/logs/million.log' );
}
*/
}
}
|
