|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace Wikibase\TermStore\MediaWiki\PackagePrivate; |
|
4
|
|
|
|
|
5
|
|
|
use InvalidArgumentException; |
|
6
|
|
|
use stdClass; |
|
7
|
|
|
use Wikimedia\Rdbms\IDatabase; |
|
8
|
|
|
use Wikimedia\Rdbms\ILoadBalancer; |
|
9
|
|
|
use Wikimedia\Rdbms\IResultWrapper; |
|
10
|
|
|
|
|
11
|
|
|
/** |
|
12
|
|
|
* Term ID resolver using the normalized database schema. |
|
13
|
|
|
* |
|
14
|
|
|
* @license GPL-2.0-or-later |
|
15
|
|
|
*/ |
|
16
|
|
|
class DatabaseTermIdsResolver implements TermIdsResolver { |
|
17
|
|
|
|
|
18
|
|
|
/** @var TypeIdsResolver */ |
|
19
|
|
|
private $typeIdsResolver; |
|
20
|
|
|
|
|
21
|
|
|
/** @var ILoadBalancer */ |
|
22
|
|
|
private $lb; |
|
23
|
|
|
|
|
24
|
|
|
/** @var IDatabase */ |
|
25
|
|
|
private $dbr = null; |
|
26
|
|
|
|
|
27
|
|
|
/** @var IDatabase */ |
|
28
|
|
|
private $dbw = null; |
|
29
|
|
|
|
|
30
|
|
|
/** @var string[] stash of data returned from the {@link TypeIdsResolver} */ |
|
31
|
|
|
private $typeNames = []; |
|
32
|
|
|
|
|
33
|
|
|
public function __construct( |
|
34
|
|
|
TypeIdsResolver $typeIdsResolver, |
|
35
|
|
|
ILoadBalancer $lb |
|
36
|
|
|
) { |
|
37
|
|
|
$this->typeIdsResolver = $typeIdsResolver; |
|
38
|
|
|
$this->lb = $lb; |
|
39
|
|
|
} |
|
40
|
|
|
|
|
41
|
|
|
/* |
|
42
|
|
|
* Term data is first read from the replica; if that returns less rows than we asked for, |
|
43
|
|
|
* then there are some new rows in the master that were not yet replicated, and we fall back |
|
44
|
|
|
* to the master. As the internal relations of the term store never change (for example, |
|
45
|
|
|
* a term_in_lang row will never suddenly point to a different text_in_lang), a master fallback |
|
46
|
|
|
* should never be necessary in any other case. However, callers need to consider where they |
|
47
|
|
|
* got the list of term IDs they pass into this method from: if it’s from a replica, they may |
|
48
|
|
|
* still see outdated data overall. |
|
49
|
|
|
*/ |
|
50
|
|
|
public function resolveTermIds( array $termIds ): array { |
|
51
|
|
|
$terms = []; |
|
52
|
|
|
$this->connectDbr(); |
|
53
|
|
|
|
|
54
|
|
|
$replicaResult = $this->selectTerms( $this->dbr, $termIds ); |
|
55
|
|
|
$this->preloadTypes( $replicaResult ); |
|
56
|
|
|
$replicaTermIds = []; |
|
57
|
|
|
|
|
58
|
|
|
foreach ( $replicaResult as $row ) { |
|
59
|
|
|
$replicaTermIds[] = $row->wbtl_id; |
|
60
|
|
|
$this->addResultTerms( $terms, $row ); |
|
61
|
|
|
} |
|
62
|
|
|
|
|
63
|
|
|
if ( count( $replicaTermIds ) !== count( $termIds ) ) { |
|
64
|
|
|
$masterTermIds = array_values( array_diff( $termIds, $replicaTermIds ) ); |
|
65
|
|
|
$this->connectDbw(); |
|
66
|
|
|
$masterResult = $this->selectTerms( $this->dbw, $masterTermIds ); |
|
67
|
|
|
$this->preloadTypes( $masterResult ); |
|
68
|
|
|
foreach ( $masterResult as $row ) { |
|
69
|
|
|
$this->addResultTerms( $terms, $row ); |
|
70
|
|
|
} |
|
71
|
|
|
} |
|
72
|
|
|
|
|
73
|
|
|
return $terms; |
|
74
|
|
|
} |
|
75
|
|
|
|
|
76
|
|
|
private function selectTerms( IDatabase $db, array $termIds ): IResultWrapper { |
|
77
|
|
|
return $db->select( |
|
78
|
|
|
[ 'wbt_term_in_lang', 'wbt_text_in_lang', 'wbt_text' ], |
|
79
|
|
|
[ 'wbtl_id', 'wbtl_type_id', 'wbxl_language', 'wbx_text' ], |
|
80
|
|
|
[ |
|
81
|
|
|
'wbtl_id' => $termIds, |
|
82
|
|
|
// join conditions |
|
83
|
|
|
'wbtl_text_in_lang_id=wbxl_id', |
|
84
|
|
|
'wbxl_text_id=wbx_id', |
|
85
|
|
|
], |
|
86
|
|
|
__METHOD__ |
|
87
|
|
|
); |
|
88
|
|
|
} |
|
89
|
|
|
|
|
90
|
|
|
private function preloadTypes( IResultWrapper $result ) { |
|
91
|
|
|
$typeIds = []; |
|
92
|
|
|
foreach ( $result as $row ) { |
|
93
|
|
|
$typeId = $row->wbtl_type_id; |
|
94
|
|
|
if ( !array_key_exists( $typeId, $this->typeNames ) ) { |
|
95
|
|
|
$typeIds[$typeId] = true; |
|
96
|
|
|
} |
|
97
|
|
|
} |
|
98
|
|
|
$this->typeNames += $this->typeIdsResolver->resolveTypeIds( array_keys( $typeIds ) ); |
|
99
|
|
|
} |
|
100
|
|
|
|
|
101
|
|
|
private function addResultTerms( array &$terms, stdClass $row ) { |
|
102
|
|
|
$type = $this->lookupType( $row->wbtl_type_id ); |
|
103
|
|
|
$lang = $row->wbxl_language; |
|
104
|
|
|
$text = $row->wbx_text; |
|
105
|
|
|
$terms[$type][$lang][] = $text; |
|
106
|
|
|
} |
|
107
|
|
|
|
|
108
|
|
|
private function lookupType( $typeId ) { |
|
109
|
|
|
$typeName = $this->typeNames[$typeId] ?? null; |
|
110
|
|
|
if ( $typeName === null ) { |
|
111
|
|
|
throw new InvalidArgumentException( |
|
112
|
|
|
'Type ID ' . $typeId . ' was requested but not preloaded!' ); |
|
113
|
|
|
} |
|
114
|
|
|
return $typeName; |
|
115
|
|
|
} |
|
116
|
|
|
|
|
117
|
|
|
private function connectDbr() { |
|
118
|
|
|
if ( $this->dbr === null ) { |
|
119
|
|
|
$this->dbr = $this->lb->getConnection( ILoadBalancer::DB_REPLICA ); |
|
120
|
|
|
} |
|
121
|
|
|
} |
|
122
|
|
|
|
|
123
|
|
|
private function connectDbw() { |
|
124
|
|
|
if ( $this->dbw === null ) { |
|
125
|
|
|
$this->dbw = $this->lb->getConnection( ILoadBalancer::DB_MASTER ); |
|
126
|
|
|
} |
|
127
|
|
|
} |
|
128
|
|
|
|
|
129
|
|
|
} |
|
130
|
|
|
|
wmde /
mediawiki-term-store
