includes/MediaWikiServices.php

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