MediaWiki REL1_32
ForeignDBViaLBRepo.php
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1<?php
27
35 protected $wiki;
36
38 protected $dbName;
39
41 protected $tablePrefix;
42
44 protected $fileFactory = [ ForeignDBFile::class, 'newFromTitle' ];
45
47 protected $fileFromRowFactory = [ ForeignDBFile::class, 'newFromRow' ];
48
50 protected $hasSharedCache;
51
55 function __construct( $info ) {
56 parent::__construct( $info );
57 $this->wiki = $info['wiki'];
58 list( $this->dbName, $this->tablePrefix ) = wfSplitWikiID( $this->wiki );
59 $this->hasSharedCache = $info['hasSharedCache'];
60 }
61
65 function getMasterDB() {
66 return $this->getDBLoadBalancer()->getConnectionRef( DB_MASTER, [], $this->wiki );
67 }
68
72 function getReplicaDB() {
73 return $this->getDBLoadBalancer()->getConnectionRef( DB_REPLICA, [], $this->wiki );
74 }
75
79 protected function getDBFactory() {
80 return function ( $index ) {
81 return $this->getDBLoadBalancer()->getConnectionRef( $index, [], $this->wiki );
82 };
83 }
84
88 protected function getDBLoadBalancer() {
89 $lbFactory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory();
90 return $lbFactory->getMainLB( $this->wiki );
91 }
92
93 function hasSharedCache() {
95 }
96
103 function getSharedCacheKey( /*...*/ ) {
104 if ( $this->hasSharedCache() ) {
105 $args = func_get_args();
106 array_unshift( $args, $this->wiki );
107
108 return implode( ':', $args );
109 } else {
110 return false;
111 }
112 }
113
114 protected function assertWritableRepo() {
115 throw new MWException( static::class . ': write operations are not supported.' );
116 }
117
118 public function getInfo() {
119 return FileRepo::getInfo();
120 }
121}
Apache License January AND DISTRIBUTION Definitions License shall mean the terms and conditions for use
wfSplitWikiID( $wiki)
Split a wiki ID into DB name and table prefix.
if( $line===false) $args
Definition cdb.php:64
getInfo()
Return information about the repository.
A foreign repository with a MediaWiki database accessible via the configured LBFactory.
getInfo()
Return information about the repository.
getSharedCacheKey()
Get a key on the primary cache for this repository.
assertWritableRepo()
Throw an exception if this repo is read-only by design.
A repository that stores files in the local filesystem and registers them in the wiki's own database.
Definition LocalRepo.php:36
MediaWiki exception.
MediaWikiServices is the service locator for the application scope of MediaWiki.
Database connection, tracking, load balancing, and transaction manager for a cluster.
deferred txt A few of the database updates required by various functions here can be deferred until after the result page is displayed to the user For updating the view updating the linked to tables after a etc PHP does not yet have any way to tell the server to actually return and disconnect while still running these but it might have such a feature in the future We handle these by creating a deferred update object and putting those objects on a global list
Definition deferred.txt:11
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition injection.txt:37
Basic database interface for live and lazy-loaded relation database handles.
Definition IDatabase.php:38
Prior to maintenance scripts were a hodgepodge of code that had no cohesion or formal method of action Beginning maintenance scripts have been cleaned up to use a unified class Directory structure How to run a script How to write your own DIRECTORY STRUCTURE The maintenance directory of a MediaWiki installation contains several all of which have unique purposes HOW TO RUN A SCRIPT Ridiculously just call php someScript php that s in the top level maintenance directory if not default wiki
The wiki should then use memcached to cache various data To use multiple just add more items to the array To increase the weight of a make its entry a array("192.168.0.1:11211", 2))
const DB_REPLICA
Definition defines.php:25
const DB_MASTER
Definition defines.php:26