includes/MediaWikiServices.php

   1 <?php
   2 namespace MediaWiki;
   3
   4 use ActorMigration;
   5 use CommentStore;
   6 use Config;
   7 use ConfigFactory;
   8 use CryptHKDF;
   9 use CryptRand;
  10 use EventRelayerGroup;
  11 use GenderCache;
  12 use GlobalVarConfig;
  13 use Hooks;
  14 use IBufferingStatsdDataFactory;
  15 use MediaWiki\Http\HttpRequestFactory;
  16 use MediaWiki\Preferences\PreferencesFactory;
  17 use MediaWiki\Shell\CommandFactory;
  18 use MediaWiki\Storage\BlobStore;
  19 use MediaWiki\Storage\BlobStoreFactory;
  20 use MediaWiki\Storage\NameTableStore;
  21 use MediaWiki\Storage\RevisionFactory;
  22 use MediaWiki\Storage\RevisionLookup;
  23 use MediaWiki\Storage\RevisionStore;
  24 use Wikimedia\Rdbms\LBFactory;
  25 use LinkCache;
  26 use Wikimedia\Rdbms\LoadBalancer;
  27 use MediaHandlerFactory;
  28 use MediaWiki\Linker\LinkRenderer;
  29 use MediaWiki\Linker\LinkRendererFactory;
  30 use MediaWiki\Services\SalvageableService;
  31 use MediaWiki\Services\ServiceContainer;
  32 use MediaWiki\Services\NoSuchServiceException;
  33 use MWException;
  34 use MimeAnalyzer;
  35 use ObjectCache;
  36 use Parser;
  37 use ParserCache;
  38 use ProxyLookup;
  39 use SearchEngine;
  40 use SearchEngineConfig;
  41 use SearchEngineFactory;
  42 use SiteLookup;
  43 use SiteStore;
  44 use WatchedItemStoreInterface;
  45 use WatchedItemQueryService;
  46 use SkinFactory;
  47 use TitleFormatter;
  48 use TitleParser;
  49 use VirtualRESTServiceClient;
  50 use MediaWiki\Interwiki\InterwikiLookup;
  51
  52 /**
  53  * Service locator for MediaWiki core services.
  54  *
  55  * This program is free software; you can redistribute it and/or modify
  56  * it under the terms of the GNU General Public License as published by
  57  * the Free Software Foundation; either version 2 of the License, or
  58  * (at your option) any later version.
  59  *
  60  * This program is distributed in the hope that it will be useful,
  61  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  62  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  63  * GNU General Public License for more details.
  64  *
  65  * You should have received a copy of the GNU General Public License along
  66  * with this program; if not, write to the Free Software Foundation, Inc.,
  67  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  68  * http://www.gnu.org/copyleft/gpl.html
  69  *
  70  * @file
  71  *
  72  * @since 1.27
  73  */
  74
  75 /**
  76  * MediaWikiServices is the service locator for the application scope of MediaWiki.
  77  * Its implemented as a simple configurable DI container.
  78  * MediaWikiServices acts as a top level factory/registry for top level services, and builds
  79  * the network of service objects that defines MediaWiki's application logic.
  80  * It acts as an entry point to MediaWiki's dependency injection mechanism.
  81  *
  82  * Services are defined in the "wiring" array passed to the constructor,
  83  * or by calling defineService().
  84  *
  85  * @see docs/injection.txt for an overview of using dependency injection in the
  86  *      MediaWiki code base.
  87  */
  88 class MediaWikiServices extends ServiceContainer {
  89
  90         /**
  91          * @var MediaWikiServices|null
  92          */
  93         private static $instance = null;
  94
  95         /**
  96          * Returns the global default instance of the top level service locator.
  97          *
  98          * @since 1.27
  99          *
 100          * The default instance is initialized using the service instantiator functions
 101          * defined in ServiceWiring.php.
 102          *
 103          * @note This should only be called by static functions! The instance returned here
 104          * should not be passed around! Objects that need access to a service should have
 105          * that service injected into the constructor, never a service locator!
 106          *
 107          * @return MediaWikiServices
 108          */
 109         public static function getInstance() {
 110                 if ( self::$instance === null ) {
 111                         // NOTE: constructing GlobalVarConfig here is not particularly pretty,
 112                         // but some information from the global scope has to be injected here,
 113                         // even if it's just a file name or database credentials to load
 114                         // configuration from.
 115                         $bootstrapConfig = new GlobalVarConfig();
 116                         self::$instance = self::newInstance( $bootstrapConfig, 'load' );
 117                 }
 118
 119                 return self::$instance;
 120         }
 121
 122         /**
 123          * Replaces the global MediaWikiServices instance.
 124          *
 125          * @since 1.28
 126          *
 127          * @note This is for use in PHPUnit tests only!
 128          *
 129          * @throws MWException if called outside of PHPUnit tests.
 130          *
 131          * @param MediaWikiServices $services The new MediaWikiServices object.
 132          *
 133          * @return MediaWikiServices The old MediaWikiServices object, so it can be restored later.
 134          */
 135         public static function forceGlobalInstance( MediaWikiServices $services ) {
 136                 if ( !defined( 'MW_PHPUNIT_TEST' ) ) {
 137                         throw new MWException( __METHOD__ . ' must not be used outside unit tests.' );
 138                 }
 139
 140                 $old = self::getInstance();
 141                 self::$instance = $services;
 142
 143                 return $old;
 144         }
 145
 146         /**
 147          * Creates a new instance of MediaWikiServices and sets it as the global default
 148          * instance. getInstance() will return a different MediaWikiServices object
 149          * after every call to resetGlobalInstance().
 150          *
 151          * @since 1.28
 152          *
 153          * @warning This should not be used during normal operation. It is intended for use
 154          * when the configuration has changed significantly since bootstrap time, e.g.
 155          * during the installation process or during testing.
 156          *
 157          * @warning Calling resetGlobalInstance() may leave the application in an inconsistent
 158          * state. Calling this is only safe under the ASSUMPTION that NO REFERENCE to
 159          * any of the services managed by MediaWikiServices exist. If any service objects
 160          * managed by the old MediaWikiServices instance remain in use, they may INTERFERE
 161          * with the operation of the services managed by the new MediaWikiServices.
 162          * Operating with a mix of services created by the old and the new
 163          * MediaWikiServices instance may lead to INCONSISTENCIES and even DATA LOSS!
 164          * Any class implementing LAZY LOADING is especially prone to this problem,
 165          * since instances would typically retain a reference to a storage layer service.
 166          *
 167          * @see forceGlobalInstance()
 168          * @see resetGlobalInstance()
 169          * @see resetBetweenTest()
 170          *
 171          * @param Config|null $bootstrapConfig The Config object to be registered as the
 172          *        'BootstrapConfig' service. This has to contain at least the information
 173          *        needed to set up the 'ConfigFactory' service. If not given, the bootstrap
 174          *        config of the old instance of MediaWikiServices will be re-used. If there
 175          *        was no previous instance, a new GlobalVarConfig object will be used to
 176          *        bootstrap the services.
 177          *
 178          * @param string $quick Set this to "quick" to allow expensive resources to be re-used.
 179          * See SalvageableService for details.
 180          *
 181          * @throws MWException If called after MW_SERVICE_BOOTSTRAP_COMPLETE has been defined in
 182          *         Setup.php (unless MW_PHPUNIT_TEST or MEDIAWIKI_INSTALL or RUN_MAINTENANCE_IF_MAIN
 183          *          is defined).
 184          */
 185         public static function resetGlobalInstance( Config $bootstrapConfig = null, $quick = '' ) {
 186                 if ( self::$instance === null ) {
 187                         // no global instance yet, nothing to reset
 188                         return;
 189                 }
 190
 191                 self::failIfResetNotAllowed( __METHOD__ );
 192
 193                 if ( $bootstrapConfig === null ) {
 194                         $bootstrapConfig = self::$instance->getBootstrapConfig();
 195                 }
 196
 197                 $oldInstance = self::$instance;
 198
 199                 self::$instance = self::newInstance( $bootstrapConfig, 'load' );
 200                 self::$instance->importWiring( $oldInstance, [ 'BootstrapConfig' ] );
 201
 202                 if ( $quick === 'quick' ) {
 203                         self::$instance->salvage( $oldInstance );
 204                 } else {
 205                         $oldInstance->destroy();
 206                 }
 207         }
 208
 209         /**
 210          * Salvages the state of any salvageable service instances in $other.
 211          *
 212          * @note $other will have been destroyed when salvage() returns.
 213          *
 214          * @param MediaWikiServices $other
 215          */
 216         private function salvage( self $other ) {
 217                 foreach ( $this->getServiceNames() as $name ) {
 218                         // The service could be new in the new instance and not registered in the
 219                         // other instance (e.g. an extension that was loaded after the instantiation of
 220                         // the other instance. Skip this service in this case. See T143974
 221                         try {
 222                                 $oldService = $other->peekService( $name );
 223                         } catch ( NoSuchServiceException $e ) {
 224                                 continue;
 225                         }
 226
 227                         if ( $oldService instanceof SalvageableService ) {
 228                                 /** @var SalvageableService $newService */
 229                                 $newService = $this->getService( $name );
 230                                 $newService->salvage( $oldService );
 231                         }
 232                 }
 233
 234                 $other->destroy();
 235         }
 236
 237         /**
 238          * Creates a new MediaWikiServices instance and initializes it according to the
 239          * given $bootstrapConfig. In particular, all wiring files defined in the
 240          * ServiceWiringFiles setting are loaded, and the MediaWikiServices hook is called.
 241          *
 242          * @param Config|null $bootstrapConfig The Config object to be registered as the
 243          *        'BootstrapConfig' service.
 244          *
 245          * @param string $loadWiring set this to 'load' to load the wiring files specified
 246          *        in the 'ServiceWiringFiles' setting in $bootstrapConfig.
 247          *
 248          * @return MediaWikiServices
 249          * @throws MWException
 250          * @throws \FatalError
 251          */
 252         private static function newInstance( Config $bootstrapConfig, $loadWiring = '' ) {
 253                 $instance = new self( $bootstrapConfig );
 254
 255                 // Load the default wiring from the specified files.
 256                 if ( $loadWiring === 'load' ) {
 257                         $wiringFiles = $bootstrapConfig->get( 'ServiceWiringFiles' );
 258                         $instance->loadWiringFiles( $wiringFiles );
 259                 }
 260
 261                 // Provide a traditional hook point to allow extensions to configure services.
 262                 Hooks::run( 'MediaWikiServices', [ $instance ] );
 263
 264                 return $instance;
 265         }
 266
 267         /**
 268          * Disables all storage layer services. After calling this, any attempt to access the
 269          * storage layer will result in an error. Use resetGlobalInstance() to restore normal
 270          * operation.
 271          *
 272          * @since 1.28
 273          *
 274          * @warning This is intended for extreme situations only and should never be used
 275          * while serving normal web requests. Legitimate use cases for this method include
 276          * the installation process. Test fixtures may also use this, if the fixture relies
 277          * on globalState.
 278          *
 279          * @see resetGlobalInstance()
 280          * @see resetChildProcessServices()
 281          */
 282         public static function disableStorageBackend() {
 283                 // TODO: also disable some Caches, JobQueues, etc
 284                 $destroy = [ 'DBLoadBalancer', 'DBLoadBalancerFactory' ];
 285                 $services = self::getInstance();
 286
 287                 foreach ( $destroy as $name ) {
 288                         $services->disableService( $name );
 289                 }
 290
 291                 ObjectCache::clear();
 292         }
 293
 294         /**
 295          * Resets any services that may have become stale after a child process
 296          * returns from after pcntl_fork(). It's also safe, but generally unnecessary,
 297          * to call this method from the parent process.
 298          *
 299          * @since 1.28
 300          *
 301          * @note This is intended for use in the context of process forking only!
 302          *
 303          * @see resetGlobalInstance()
 304          * @see disableStorageBackend()
 305          */
 306         public static function resetChildProcessServices() {
 307                 // NOTE: for now, just reset everything. Since we don't know the interdependencies
 308                 // between services, we can't do this more selectively at this time.
 309                 self::resetGlobalInstance();
 310
 311                 // Child, reseed because there is no bug in PHP:
 312                 // https://bugs.php.net/bug.php?id=42465
 313                 mt_srand( getmypid() );
 314         }
 315
 316         /**
 317          * Resets the given service for testing purposes.
 318          *
 319          * @since 1.28
 320          *
 321          * @warning This is generally unsafe! Other services may still retain references
 322          * to the stale service instance, leading to failures and inconsistencies. Subclasses
 323          * may use this method to reset specific services under specific instances, but
 324          * it should not be exposed to application logic.
 325          *
 326          * @note With proper dependency injection used throughout the codebase, this method
 327          * should not be needed. It is provided to allow tests that pollute global service
 328          * instances to clean up.
 329          *
 330          * @param string $name
 331          * @param bool $destroy Whether the service instance should be destroyed if it exists.
 332          *        When set to false, any existing service instance will effectively be detached
 333          *        from the container.
 334          *
 335          * @throws MWException if called outside of PHPUnit tests.
 336          */
 337         public function resetServiceForTesting( $name, $destroy = true ) {
 338                 if ( !defined( 'MW_PHPUNIT_TEST' ) && !defined( 'MW_PARSER_TEST' ) ) {
 339                         throw new MWException( 'resetServiceForTesting() must not be used outside unit tests.' );
 340                 }
 341
 342                 $this->resetService( $name, $destroy );
 343         }
 344
 345         /**
 346          * Convenience method that throws an exception unless it is called during a phase in which
 347          * resetting of global services is allowed. In general, services should not be reset
 348          * individually, since that may introduce inconsistencies.
 349          *
 350          * @since 1.28
 351          *
 352          * This method will throw an exception if:
 353          *
 354          * - self::$resetInProgress is false (to allow all services to be reset together
 355          *   via resetGlobalInstance)
 356          * - and MEDIAWIKI_INSTALL is not defined (to allow services to be reset during installation)
 357          * - and MW_PHPUNIT_TEST is not defined (to allow services to be reset during testing)
 358          *
 359          * This method is intended to be used to safeguard against accidentally resetting
 360          * global service instances that are not yet managed by MediaWikiServices. It is
 361          * defined here in the MediaWikiServices services class to have a central place
 362          * for managing service bootstrapping and resetting.
 363          *
 364          * @param string $method the name of the caller method, as given by __METHOD__.
 365          *
 366          * @throws MWException if called outside bootstrap mode.
 367          *
 368          * @see resetGlobalInstance()
 369          * @see forceGlobalInstance()
 370          * @see disableStorageBackend()
 371          */
 372         public static function failIfResetNotAllowed( $method ) {
 373                 if ( !defined( 'MW_PHPUNIT_TEST' )
 374                         && !defined( 'MW_PARSER_TEST' )
 375                         && !defined( 'MEDIAWIKI_INSTALL' )
 376                         && !defined( 'RUN_MAINTENANCE_IF_MAIN' )
 377                         && defined( 'MW_SERVICE_BOOTSTRAP_COMPLETE' )
 378                 ) {
 379                         throw new MWException( $method . ' may only be called during bootstrapping and unit tests!' );
 380                 }
 381         }
 382
 383         /**
 384          * @param Config $config The Config object to be registered as the 'BootstrapConfig' service.
 385          *        This has to contain at least the information needed to set up the 'ConfigFactory'
 386          *        service.
 387          */
 388         public function __construct( Config $config ) {
 389                 parent::__construct();
 390
 391                 // Register the given Config object as the bootstrap config service.
 392                 $this->defineService( 'BootstrapConfig', function () use ( $config ) {
 393                         return $config;
 394                 } );
 395         }
 396
 397         // CONVENIENCE GETTERS ////////////////////////////////////////////////////
 398
 399         /**
 400          * Returns the Config object containing the bootstrap configuration.
 401          * Bootstrap configuration would typically include database credentials
 402          * and other information that may be needed before the ConfigFactory
 403          * service can be instantiated.
 404          *
 405          * @note This should only be used during bootstrapping, in particular
 406          * when creating the MainConfig service. Application logic should
 407          * use getMainConfig() to get a Config instances.
 408          *
 409          * @since 1.27
 410          * @return Config
 411          */
 412         public function getBootstrapConfig() {
 413                 return $this->getService( 'BootstrapConfig' );
 414         }
 415
 416         /**
 417          * @since 1.27
 418          * @return ConfigFactory
 419          */
 420         public function getConfigFactory() {
 421                 return $this->getService( 'ConfigFactory' );
 422         }
 423
 424         /**
 425          * Returns the Config object that provides configuration for MediaWiki core.
 426          * This may or may not be the same object that is returned by getBootstrapConfig().
 427          *
 428          * @since 1.27
 429          * @return Config
 430          */
 431         public function getMainConfig() {
 432                 return $this->getService( 'MainConfig' );
 433         }
 434
 435         /**
 436          * @since 1.27
 437          * @return SiteLookup
 438          */
 439         public function getSiteLookup() {
 440                 return $this->getService( 'SiteLookup' );
 441         }
 442
 443         /**
 444          * @since 1.27
 445          * @return SiteStore
 446          */
 447         public function getSiteStore() {
 448                 return $this->getService( 'SiteStore' );
 449         }
 450
 451         /**
 452          * @since 1.28
 453          * @return InterwikiLookup
 454          */
 455         public function getInterwikiLookup() {
 456                 return $this->getService( 'InterwikiLookup' );
 457         }
 458
 459         /**
 460          * @since 1.27
 461          * @return IBufferingStatsdDataFactory
 462          */
 463         public function getStatsdDataFactory() {
 464                 return $this->getService( 'StatsdDataFactory' );
 465         }
 466
 467         /**
 468          * @since 1.27
 469          * @return EventRelayerGroup
 470          */
 471         public function getEventRelayerGroup() {
 472                 return $this->getService( 'EventRelayerGroup' );
 473         }
 474
 475         /**
 476          * @since 1.27
 477          * @return SearchEngine
 478          */
 479         public function newSearchEngine() {
 480                 // New engine object every time, since they keep state
 481                 return $this->getService( 'SearchEngineFactory' )->create();
 482         }
 483
 484         /**
 485          * @since 1.27
 486          * @return SearchEngineFactory
 487          */
 488         public function getSearchEngineFactory() {
 489                 return $this->getService( 'SearchEngineFactory' );
 490         }
 491
 492         /**
 493          * @since 1.27
 494          * @return SearchEngineConfig
 495          */
 496         public function getSearchEngineConfig() {
 497                 return $this->getService( 'SearchEngineConfig' );
 498         }
 499
 500         /**
 501          * @since 1.27
 502          * @return SkinFactory
 503          */
 504         public function getSkinFactory() {
 505                 return $this->getService( 'SkinFactory' );
 506         }
 507
 508         /**
 509          * @since 1.28
 510          * @return LBFactory
 511          */
 512         public function getDBLoadBalancerFactory() {
 513                 return $this->getService( 'DBLoadBalancerFactory' );
 514         }
 515
 516         /**
 517          * @since 1.28
 518          * @return LoadBalancer The main DB load balancer for the local wiki.
 519          */
 520         public function getDBLoadBalancer() {
 521                 return $this->getService( 'DBLoadBalancer' );
 522         }
 523
 524         /**
 525          * @since 1.28
 526          * @return WatchedItemStoreInterface
 527          */
 528         public function getWatchedItemStore() {
 529                 return $this->getService( 'WatchedItemStore' );
 530         }
 531
 532         /**
 533          * @since 1.28
 534          * @return WatchedItemQueryService
 535          */
 536         public function getWatchedItemQueryService() {
 537                 return $this->getService( 'WatchedItemQueryService' );
 538         }
 539
 540         /**
 541          * @since 1.28
 542          * @return CryptRand
 543          */
 544         public function getCryptRand() {
 545                 return $this->getService( 'CryptRand' );
 546         }
 547
 548         /**
 549          * @since 1.28
 550          * @return CryptHKDF
 551          */
 552         public function getCryptHKDF() {
 553                 return $this->getService( 'CryptHKDF' );
 554         }
 555
 556         /**
 557          * @since 1.28
 558          * @return MediaHandlerFactory
 559          */
 560         public function getMediaHandlerFactory() {
 561                 return $this->getService( 'MediaHandlerFactory' );
 562         }
 563
 564         /**
 565          * @since 1.28
 566          * @return MimeAnalyzer
 567          */
 568         public function getMimeAnalyzer() {
 569                 return $this->getService( 'MimeAnalyzer' );
 570         }
 571
 572         /**
 573          * @since 1.28
 574          * @return ProxyLookup
 575          */
 576         public function getProxyLookup() {
 577                 return $this->getService( 'ProxyLookup' );
 578         }
 579
 580         /**
 581          * @since 1.29
 582          * @return Parser
 583          */
 584         public function getParser() {
 585                 return $this->getService( 'Parser' );
 586         }
 587
 588         /**
 589          * @since 1.30
 590          * @return ParserCache
 591          */
 592         public function getParserCache() {
 593                 return $this->getService( 'ParserCache' );
 594         }
 595
 596         /**
 597          * @since 1.28
 598          * @return GenderCache
 599          */
 600         public function getGenderCache() {
 601                 return $this->getService( 'GenderCache' );
 602         }
 603
 604         /**
 605          * @since 1.28
 606          * @return LinkCache
 607          */
 608         public function getLinkCache() {
 609                 return $this->getService( 'LinkCache' );
 610         }
 611
 612         /**
 613          * @since 1.28
 614          * @return LinkRendererFactory
 615          */
 616         public function getLinkRendererFactory() {
 617                 return $this->getService( 'LinkRendererFactory' );
 618         }
 619
 620         /**
 621          * LinkRenderer instance that can be used
 622          * if no custom options are needed
 623          *
 624          * @since 1.28
 625          * @return LinkRenderer
 626          */
 627         public function getLinkRenderer() {
 628                 return $this->getService( 'LinkRenderer' );
 629         }
 630
 631         /**
 632          * @since 1.28
 633          * @return TitleFormatter
 634          */
 635         public function getTitleFormatter() {
 636                 return $this->getService( 'TitleFormatter' );
 637         }
 638
 639         /**
 640          * @since 1.28
 641          * @return TitleParser
 642          */
 643         public function getTitleParser() {
 644                 return $this->getService( 'TitleParser' );
 645         }
 646
 647         /**
 648          * @since 1.28
 649          * @return \BagOStuff
 650          */
 651         public function getMainObjectStash() {
 652                 return $this->getService( 'MainObjectStash' );
 653         }
 654
 655         /**
 656          * @since 1.28
 657          * @return \WANObjectCache
 658          */
 659         public function getMainWANObjectCache() {
 660                 return $this->getService( 'MainWANObjectCache' );
 661         }
 662
 663         /**
 664          * @since 1.28
 665          * @return \BagOStuff
 666          */
 667         public function getLocalServerObjectCache() {
 668                 return $this->getService( 'LocalServerObjectCache' );
 669         }
 670
 671         /**
 672          * @since 1.28
 673          * @return VirtualRESTServiceClient
 674          */
 675         public function getVirtualRESTServiceClient() {
 676                 return $this->getService( 'VirtualRESTServiceClient' );
 677         }
 678
 679         /**
 680          * @since 1.29
 681          * @return \ConfiguredReadOnlyMode
 682          */
 683         public function getConfiguredReadOnlyMode() {
 684                 return $this->getService( 'ConfiguredReadOnlyMode' );
 685         }
 686
 687         /**
 688          * @since 1.29
 689          * @return \ReadOnlyMode
 690          */
 691         public function getReadOnlyMode() {
 692                 return $this->getService( 'ReadOnlyMode' );
 693         }
 694
 695         /**
 696          * @since 1.31
 697          * @return \UploadRevisionImporter
 698          */
 699         public function getWikiRevisionUploadImporter() {
 700                 return $this->getService( 'UploadRevisionImporter' );
 701         }
 702
 703         /**
 704          * @since 1.31
 705          * @return \OldRevisionImporter
 706          */
 707         public function getWikiRevisionOldRevisionImporter() {
 708                 return $this->getService( 'OldRevisionImporter' );
 709         }
 710
 711         /**
 712          * @since 1.31
 713          * @return \OldRevisionImporter
 714          */
 715         public function getWikiRevisionOldRevisionImporterNoUpdates() {
 716                 return $this->getService( 'WikiRevisionOldRevisionImporterNoUpdates' );
 717         }
 718
 719         /**
 720          * @since 1.30
 721          * @return CommandFactory
 722          */
 723         public function getShellCommandFactory() {
 724                 return $this->getService( 'ShellCommandFactory' );
 725         }
 726
 727         /**
 728          * @since 1.31
 729          * @return \ExternalStoreFactory
 730          */
 731         public function getExternalStoreFactory() {
 732                 return $this->getService( 'ExternalStoreFactory' );
 733         }
 734
 735         /**
 736          * @since 1.31
 737          * @return BlobStoreFactory
 738          */
 739         public function getBlobStoreFactory() {
 740                 return $this->getService( 'BlobStoreFactory' );
 741         }
 742
 743         /**
 744          * @since 1.31
 745          * @return BlobStore
 746          */
 747         public function getBlobStore() {
 748                 return $this->getService( '_SqlBlobStore' );
 749         }
 750
 751         /**
 752          * @since 1.31
 753          * @return RevisionStore
 754          */
 755         public function getRevisionStore() {
 756                 return $this->getService( 'RevisionStore' );
 757         }
 758
 759         /**
 760          * @since 1.31
 761          * @return RevisionLookup
 762          */
 763         public function getRevisionLookup() {
 764                 return $this->getService( 'RevisionLookup' );
 765         }
 766
 767         /**
 768          * @since 1.31
 769          * @return RevisionFactory
 770          */
 771         public function getRevisionFactory() {
 772                 return $this->getService( 'RevisionFactory' );
 773         }
 774
 775         /**
 776          * @since 1.31
 777          * @return NameTableStore
 778          */
 779         public function getContentModelStore() {
 780                 return $this->getService( 'ContentModelStore' );
 781         }
 782
 783         /**
 784          * @since 1.31
 785          * @return NameTableStore
 786          */
 787         public function getSlotRoleStore() {
 788                 return $this->getService( 'SlotRoleStore' );
 789         }
 790
 791         /**
 792          * @since 1.31
 793          * @return PreferencesFactory
 794          */
 795         public function getPreferencesFactory() {
 796                 return $this->getService( 'PreferencesFactory' );
 797         }
 798
 799         /**
 800          * @since 1.31
 801          * @return HttpRequestFactory
 802          */
 803         public function getHttpRequestFactory() {
 804                 return $this->getService( 'HttpRequestFactory' );
 805         }
 806
 807         /**
 808          * @since 1.31
 809          * @return CommentStore
 810          */
 811         public function getCommentStore() {
 812                 return $this->getService( 'CommentStore' );
 813         }
 814
 815         /**
 816          * @since 1.31
 817          * @return ActorMigration
 818          */
 819         public function getActorMigration() {
 820                 return $this->getService( 'ActorMigration' );
 821         }
 822
 823         ///////////////////////////////////////////////////////////////////////////
 824         // NOTE: When adding a service getter here, don't forget to add a test
 825         // case for it in MediaWikiServicesTest::provideGetters() and in
 826         // MediaWikiServicesTest::provideGetService()!
 827         ///////////////////////////////////////////////////////////////////////////
 828
 829 }