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 OldRevisionImporter;
  25 use MediaWiki\Storage\RevisionStoreFactory;
  26 use UploadRevisionImporter;
  27 use Wikimedia\Rdbms\LBFactory;
  28 use LinkCache;
  29 use Wikimedia\Rdbms\LoadBalancer;
  30 use MediaHandlerFactory;
  31 use MediaWiki\Config\ConfigRepository;
  32 use MediaWiki\Linker\LinkRenderer;
  33 use MediaWiki\Linker\LinkRendererFactory;
  34 use MediaWiki\Services\SalvageableService;
  35 use MediaWiki\Services\ServiceContainer;
  36 use MediaWiki\Services\NoSuchServiceException;
  37 use MWException;
  38 use MimeAnalyzer;
  39 use ObjectCache;
  40 use Parser;
  41 use ParserCache;
  42 use PasswordFactory;
  43 use ProxyLookup;
  44 use SearchEngine;
  45 use SearchEngineConfig;
  46 use SearchEngineFactory;
  47 use SiteLookup;
  48 use SiteStore;
  49 use WatchedItemStoreInterface;
  50 use WatchedItemQueryService;
  51 use SkinFactory;
  52 use TitleFormatter;
  53 use TitleParser;
  54 use VirtualRESTServiceClient;
  55 use MediaWiki\Interwiki\InterwikiLookup;
  56 use MagicWordFactory;
  57
  58 /**
  59  * Service locator for MediaWiki core services.
  60  *
  61  * This program is free software; you can redistribute it and/or modify
  62  * it under the terms of the GNU General Public License as published by
  63  * the Free Software Foundation; either version 2 of the License, or
  64  * (at your option) any later version.
  65  *
  66  * This program is distributed in the hope that it will be useful,
  67  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  68  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  69  * GNU General Public License for more details.
  70  *
  71  * You should have received a copy of the GNU General Public License along
  72  * with this program; if not, write to the Free Software Foundation, Inc.,
  73  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  74  * http://www.gnu.org/copyleft/gpl.html
  75  *
  76  * @file
  77  *
  78  * @since 1.27
  79  */
  80
  81 /**
  82  * MediaWikiServices is the service locator for the application scope of MediaWiki.
  83  * Its implemented as a simple configurable DI container.
  84  * MediaWikiServices acts as a top level factory/registry for top level services, and builds
  85  * the network of service objects that defines MediaWiki's application logic.
  86  * It acts as an entry point to MediaWiki's dependency injection mechanism.
  87  *
  88  * Services are defined in the "wiring" array passed to the constructor,
  89  * or by calling defineService().
  90  *
  91  * @see docs/injection.txt for an overview of using dependency injection in the
  92  *      MediaWiki code base.
  93  */
  94 class MediaWikiServices extends ServiceContainer {
  95
  96         /**
  97          * @var MediaWikiServices|null
  98          */
  99         private static $instance = null;
 100
 101         /**
 102          * Returns the global default instance of the top level service locator.
 103          *
 104          * @since 1.27
 105          *
 106          * The default instance is initialized using the service instantiator functions
 107          * defined in ServiceWiring.php.
 108          *
 109          * @note This should only be called by static functions! The instance returned here
 110          * should not be passed around! Objects that need access to a service should have
 111          * that service injected into the constructor, never a service locator!
 112          *
 113          * @return MediaWikiServices
 114          */
 115         public static function getInstance() {
 116                 if ( self::$instance === null ) {
 117                         // NOTE: constructing GlobalVarConfig here is not particularly pretty,
 118                         // but some information from the global scope has to be injected here,
 119                         // even if it's just a file name or database credentials to load
 120                         // configuration from.
 121                         $bootstrapConfig = new GlobalVarConfig();
 122                         self::$instance = self::newInstance( $bootstrapConfig, 'load' );
 123                 }
 124
 125                 return self::$instance;
 126         }
 127
 128         /**
 129          * Replaces the global MediaWikiServices instance.
 130          *
 131          * @since 1.28
 132          *
 133          * @note This is for use in PHPUnit tests only!
 134          *
 135          * @throws MWException if called outside of PHPUnit tests.
 136          *
 137          * @param MediaWikiServices $services The new MediaWikiServices object.
 138          *
 139          * @return MediaWikiServices The old MediaWikiServices object, so it can be restored later.
 140          */
 141         public static function forceGlobalInstance( MediaWikiServices $services ) {
 142                 if ( !defined( 'MW_PHPUNIT_TEST' ) ) {
 143                         throw new MWException( __METHOD__ . ' must not be used outside unit tests.' );
 144                 }
 145
 146                 $old = self::getInstance();
 147                 self::$instance = $services;
 148
 149                 return $old;
 150         }
 151
 152         /**
 153          * Creates a new instance of MediaWikiServices and sets it as the global default
 154          * instance. getInstance() will return a different MediaWikiServices object
 155          * after every call to resetGlobalInstance().
 156          *
 157          * @since 1.28
 158          *
 159          * @warning This should not be used during normal operation. It is intended for use
 160          * when the configuration has changed significantly since bootstrap time, e.g.
 161          * during the installation process or during testing.
 162          *
 163          * @warning Calling resetGlobalInstance() may leave the application in an inconsistent
 164          * state. Calling this is only safe under the ASSUMPTION that NO REFERENCE to
 165          * any of the services managed by MediaWikiServices exist. If any service objects
 166          * managed by the old MediaWikiServices instance remain in use, they may INTERFERE
 167          * with the operation of the services managed by the new MediaWikiServices.
 168          * Operating with a mix of services created by the old and the new
 169          * MediaWikiServices instance may lead to INCONSISTENCIES and even DATA LOSS!
 170          * Any class implementing LAZY LOADING is especially prone to this problem,
 171          * since instances would typically retain a reference to a storage layer service.
 172          *
 173          * @see forceGlobalInstance()
 174          * @see resetGlobalInstance()
 175          * @see resetBetweenTest()
 176          *
 177          * @param Config|null $bootstrapConfig The Config object to be registered as the
 178          *        'BootstrapConfig' service. This has to contain at least the information
 179          *        needed to set up the 'ConfigFactory' service. If not given, the bootstrap
 180          *        config of the old instance of MediaWikiServices will be re-used. If there
 181          *        was no previous instance, a new GlobalVarConfig object will be used to
 182          *        bootstrap the services.
 183          *
 184          * @param string $quick Set this to "quick" to allow expensive resources to be re-used.
 185          * See SalvageableService for details.
 186          *
 187          * @throws MWException If called after MW_SERVICE_BOOTSTRAP_COMPLETE has been defined in
 188          *         Setup.php (unless MW_PHPUNIT_TEST or MEDIAWIKI_INSTALL or RUN_MAINTENANCE_IF_MAIN
 189          *          is defined).
 190          */
 191         public static function resetGlobalInstance( Config $bootstrapConfig = null, $quick = '' ) {
 192                 if ( self::$instance === null ) {
 193                         // no global instance yet, nothing to reset
 194                         return;
 195                 }
 196
 197                 self::failIfResetNotAllowed( __METHOD__ );
 198
 199                 if ( $bootstrapConfig === null ) {
 200                         $bootstrapConfig = self::$instance->getBootstrapConfig();
 201                 }
 202
 203                 $oldInstance = self::$instance;
 204
 205                 self::$instance = self::newInstance( $bootstrapConfig, 'load' );
 206                 self::$instance->importWiring( $oldInstance, [ 'BootstrapConfig' ] );
 207
 208                 if ( $quick === 'quick' ) {
 209                         self::$instance->salvage( $oldInstance );
 210                 } else {
 211                         $oldInstance->destroy();
 212                 }
 213         }
 214
 215         /**
 216          * Salvages the state of any salvageable service instances in $other.
 217          *
 218          * @note $other will have been destroyed when salvage() returns.
 219          *
 220          * @param MediaWikiServices $other
 221          */
 222         private function salvage( self $other ) {
 223                 foreach ( $this->getServiceNames() as $name ) {
 224                         // The service could be new in the new instance and not registered in the
 225                         // other instance (e.g. an extension that was loaded after the instantiation of
 226                         // the other instance. Skip this service in this case. See T143974
 227                         try {
 228                                 $oldService = $other->peekService( $name );
 229                         } catch ( NoSuchServiceException $e ) {
 230                                 continue;
 231                         }
 232
 233                         if ( $oldService instanceof SalvageableService ) {
 234                                 /** @var SalvageableService $newService */
 235                                 $newService = $this->getService( $name );
 236                                 $newService->salvage( $oldService );
 237                         }
 238                 }
 239
 240                 $other->destroy();
 241         }
 242
 243         /**
 244          * Creates a new MediaWikiServices instance and initializes it according to the
 245          * given $bootstrapConfig. In particular, all wiring files defined in the
 246          * ServiceWiringFiles setting are loaded, and the MediaWikiServices hook is called.
 247          *
 248          * @param Config|null $bootstrapConfig The Config object to be registered as the
 249          *        'BootstrapConfig' service.
 250          *
 251          * @param string $loadWiring set this to 'load' to load the wiring files specified
 252          *        in the 'ServiceWiringFiles' setting in $bootstrapConfig.
 253          *
 254          * @return MediaWikiServices
 255          * @throws MWException
 256          * @throws \FatalError
 257          */
 258         private static function newInstance( Config $bootstrapConfig, $loadWiring = '' ) {
 259                 $instance = new self( $bootstrapConfig );
 260
 261                 // Load the default wiring from the specified files.
 262                 if ( $loadWiring === 'load' ) {
 263                         $wiringFiles = $bootstrapConfig->get( 'ServiceWiringFiles' );
 264                         $instance->loadWiringFiles( $wiringFiles );
 265                 }
 266
 267                 // Provide a traditional hook point to allow extensions to configure services.
 268                 Hooks::run( 'MediaWikiServices', [ $instance ] );
 269
 270                 return $instance;
 271         }
 272
 273         /**
 274          * Disables all storage layer services. After calling this, any attempt to access the
 275          * storage layer will result in an error. Use resetGlobalInstance() to restore normal
 276          * operation.
 277          *
 278          * @since 1.28
 279          *
 280          * @warning This is intended for extreme situations only and should never be used
 281          * while serving normal web requests. Legitimate use cases for this method include
 282          * the installation process. Test fixtures may also use this, if the fixture relies
 283          * on globalState.
 284          *
 285          * @see resetGlobalInstance()
 286          * @see resetChildProcessServices()
 287          */
 288         public static function disableStorageBackend() {
 289                 // TODO: also disable some Caches, JobQueues, etc
 290                 $destroy = [ 'DBLoadBalancer', 'DBLoadBalancerFactory' ];
 291                 $services = self::getInstance();
 292
 293                 foreach ( $destroy as $name ) {
 294                         $services->disableService( $name );
 295                 }
 296
 297                 ObjectCache::clear();
 298         }
 299
 300         /**
 301          * Resets any services that may have become stale after a child process
 302          * returns from after pcntl_fork(). It's also safe, but generally unnecessary,
 303          * to call this method from the parent process.
 304          *
 305          * @since 1.28
 306          *
 307          * @note This is intended for use in the context of process forking only!
 308          *
 309          * @see resetGlobalInstance()
 310          * @see disableStorageBackend()
 311          */
 312         public static function resetChildProcessServices() {
 313                 // NOTE: for now, just reset everything. Since we don't know the interdependencies
 314                 // between services, we can't do this more selectively at this time.
 315                 self::resetGlobalInstance();
 316
 317                 // Child, reseed because there is no bug in PHP:
 318                 // https://bugs.php.net/bug.php?id=42465
 319                 mt_srand( getmypid() );
 320         }
 321
 322         /**
 323          * Resets the given service for testing purposes.
 324          *
 325          * @since 1.28
 326          *
 327          * @warning This is generally unsafe! Other services may still retain references
 328          * to the stale service instance, leading to failures and inconsistencies. Subclasses
 329          * may use this method to reset specific services under specific instances, but
 330          * it should not be exposed to application logic.
 331          *
 332          * @note With proper dependency injection used throughout the codebase, this method
 333          * should not be needed. It is provided to allow tests that pollute global service
 334          * instances to clean up.
 335          *
 336          * @param string $name
 337          * @param bool $destroy Whether the service instance should be destroyed if it exists.
 338          *        When set to false, any existing service instance will effectively be detached
 339          *        from the container.
 340          *
 341          * @throws MWException if called outside of PHPUnit tests.
 342          */
 343         public function resetServiceForTesting( $name, $destroy = true ) {
 344                 if ( !defined( 'MW_PHPUNIT_TEST' ) && !defined( 'MW_PARSER_TEST' ) ) {
 345                         throw new MWException( 'resetServiceForTesting() must not be used outside unit tests.' );
 346                 }
 347
 348                 $this->resetService( $name, $destroy );
 349         }
 350
 351         /**
 352          * Convenience method that throws an exception unless it is called during a phase in which
 353          * resetting of global services is allowed. In general, services should not be reset
 354          * individually, since that may introduce inconsistencies.
 355          *
 356          * @since 1.28
 357          *
 358          * This method will throw an exception if:
 359          *
 360          * - self::$resetInProgress is false (to allow all services to be reset together
 361          *   via resetGlobalInstance)
 362          * - and MEDIAWIKI_INSTALL is not defined (to allow services to be reset during installation)
 363          * - and MW_PHPUNIT_TEST is not defined (to allow services to be reset during testing)
 364          *
 365          * This method is intended to be used to safeguard against accidentally resetting
 366          * global service instances that are not yet managed by MediaWikiServices. It is
 367          * defined here in the MediaWikiServices services class to have a central place
 368          * for managing service bootstrapping and resetting.
 369          *
 370          * @param string $method the name of the caller method, as given by __METHOD__.
 371          *
 372          * @throws MWException if called outside bootstrap mode.
 373          *
 374          * @see resetGlobalInstance()
 375          * @see forceGlobalInstance()
 376          * @see disableStorageBackend()
 377          */
 378         public static function failIfResetNotAllowed( $method ) {
 379                 if ( !defined( 'MW_PHPUNIT_TEST' )
 380                         && !defined( 'MW_PARSER_TEST' )
 381                         && !defined( 'MEDIAWIKI_INSTALL' )
 382                         && !defined( 'RUN_MAINTENANCE_IF_MAIN' )
 383                         && defined( 'MW_SERVICE_BOOTSTRAP_COMPLETE' )
 384                 ) {
 385                         throw new MWException( $method . ' may only be called during bootstrapping and unit tests!' );
 386                 }
 387         }
 388
 389         /**
 390          * @param Config $config The Config object to be registered as the 'BootstrapConfig' service.
 391          *        This has to contain at least the information needed to set up the 'ConfigFactory'
 392          *        service.
 393          */
 394         public function __construct( Config $config ) {
 395                 parent::__construct();
 396
 397                 // Register the given Config object as the bootstrap config service.
 398                 $this->defineService( 'BootstrapConfig', function () use ( $config ) {
 399                         return $config;
 400                 } );
 401         }
 402
 403         // CONVENIENCE GETTERS ////////////////////////////////////////////////////
 404
 405         /**
 406          * @since 1.31
 407          * @return ActorMigration
 408          */
 409         public function getActorMigration() {
 410                 return $this->getService( 'ActorMigration' );
 411         }
 412
 413         /**
 414          * @since 1.31
 415          * @return BlobStore
 416          */
 417         public function getBlobStore() {
 418                 return $this->getService( '_SqlBlobStore' );
 419         }
 420
 421         /**
 422          * @since 1.31
 423          * @return BlobStoreFactory
 424          */
 425         public function getBlobStoreFactory() {
 426                 return $this->getService( 'BlobStoreFactory' );
 427         }
 428
 429         /**
 430          * Returns the Config object containing the bootstrap configuration.
 431          * Bootstrap configuration would typically include database credentials
 432          * and other information that may be needed before the ConfigFactory
 433          * service can be instantiated.
 434          *
 435          * @note This should only be used during bootstrapping, in particular
 436          * when creating the MainConfig service. Application logic should
 437          * use getMainConfig() to get a Config instances.
 438          *
 439          * @since 1.27
 440          * @return Config
 441          */
 442         public function getBootstrapConfig() {
 443                 return $this->getService( 'BootstrapConfig' );
 444         }
 445
 446         /**
 447          * @since 1.32
 448          * @return NameTableStore
 449          */
 450         public function getChangeTagDefStore() {
 451                 return $this->getService( 'ChangeTagDefStore' );
 452         }
 453
 454         /**
 455          * @since 1.31
 456          * @return CommentStore
 457          */
 458         public function getCommentStore() {
 459                 return $this->getService( 'CommentStore' );
 460         }
 461
 462         /**
 463          * @since 1.27
 464          * @return ConfigFactory
 465          */
 466         public function getConfigFactory() {
 467                 return $this->getService( 'ConfigFactory' );
 468         }
 469
 470         /**
 471          * @since 1.32
 472          * @return ConfigRepository
 473          */
 474         public function getConfigRepository() {
 475                 return $this->getService( 'ConfigRepository' );
 476         }
 477
 478         /**
 479          * @since 1.29
 480          * @return \ConfiguredReadOnlyMode
 481          */
 482         public function getConfiguredReadOnlyMode() {
 483                 return $this->getService( 'ConfiguredReadOnlyMode' );
 484         }
 485
 486         /**
 487          * @since 1.32
 488          * @return \Language
 489          */
 490         public function getContentLanguage() {
 491                 return $this->getService( 'ContentLanguage' );
 492         }
 493
 494         /**
 495          * @since 1.31
 496          * @return NameTableStore
 497          */
 498         public function getContentModelStore() {
 499                 return $this->getService( 'ContentModelStore' );
 500         }
 501
 502         /**
 503          * @since 1.28
 504          * @return CryptHKDF
 505          */
 506         public function getCryptHKDF() {
 507                 return $this->getService( 'CryptHKDF' );
 508         }
 509
 510         /**
 511          * @since 1.28
 512          * @deprecated since 1.32, use random_bytes()/random_int()
 513          * @return CryptRand
 514          */
 515         public function getCryptRand() {
 516                 return $this->getService( 'CryptRand' );
 517         }
 518
 519         /**
 520          * @since 1.28
 521          * @return LoadBalancer The main DB load balancer for the local wiki.
 522          */
 523         public function getDBLoadBalancer() {
 524                 return $this->getService( 'DBLoadBalancer' );
 525         }
 526
 527         /**
 528          * @since 1.28
 529          * @return LBFactory
 530          */
 531         public function getDBLoadBalancerFactory() {
 532                 return $this->getService( 'DBLoadBalancerFactory' );
 533         }
 534
 535         /**
 536          * @since 1.27
 537          * @return EventRelayerGroup
 538          */
 539         public function getEventRelayerGroup() {
 540                 return $this->getService( 'EventRelayerGroup' );
 541         }
 542
 543         /**
 544          * @since 1.31
 545          * @return \ExternalStoreFactory
 546          */
 547         public function getExternalStoreFactory() {
 548                 return $this->getService( 'ExternalStoreFactory' );
 549         }
 550
 551         /**
 552          * @since 1.28
 553          * @return GenderCache
 554          */
 555         public function getGenderCache() {
 556                 return $this->getService( 'GenderCache' );
 557         }
 558
 559         /**
 560          * @since 1.31
 561          * @return HttpRequestFactory
 562          */
 563         public function getHttpRequestFactory() {
 564                 return $this->getService( 'HttpRequestFactory' );
 565         }
 566
 567         /**
 568          * @since 1.28
 569          * @return InterwikiLookup
 570          */
 571         public function getInterwikiLookup() {
 572                 return $this->getService( 'InterwikiLookup' );
 573         }
 574
 575         /**
 576          * @since 1.28
 577          * @return LinkCache
 578          */
 579         public function getLinkCache() {
 580                 return $this->getService( 'LinkCache' );
 581         }
 582
 583         /**
 584          * LinkRenderer instance that can be used
 585          * if no custom options are needed
 586          *
 587          * @since 1.28
 588          * @return LinkRenderer
 589          */
 590         public function getLinkRenderer() {
 591                 return $this->getService( 'LinkRenderer' );
 592         }
 593
 594         /**
 595          * @since 1.28
 596          * @return LinkRendererFactory
 597          */
 598         public function getLinkRendererFactory() {
 599                 return $this->getService( 'LinkRendererFactory' );
 600         }
 601
 602         /**
 603          * @since 1.28
 604          * @return \BagOStuff
 605          */
 606         public function getLocalServerObjectCache() {
 607                 return $this->getService( 'LocalServerObjectCache' );
 608         }
 609
 610         /**
 611          * @since 1.32
 612          * @return MagicWordFactory
 613          */
 614         public function getMagicWordFactory() {
 615                 return $this->getService( 'MagicWordFactory' );
 616         }
 617
 618         /**
 619          * Returns the Config object that provides configuration for MediaWiki core.
 620          * This may or may not be the same object that is returned by getBootstrapConfig().
 621          *
 622          * @since 1.27
 623          * @return Config
 624          */
 625         public function getMainConfig() {
 626                 return $this->getService( 'MainConfig' );
 627         }
 628
 629         /**
 630          * @since 1.28
 631          * @return \BagOStuff
 632          */
 633         public function getMainObjectStash() {
 634                 return $this->getService( 'MainObjectStash' );
 635         }
 636
 637         /**
 638          * @since 1.28
 639          * @return \WANObjectCache
 640          */
 641         public function getMainWANObjectCache() {
 642                 return $this->getService( 'MainWANObjectCache' );
 643         }
 644
 645         /**
 646          * @since 1.28
 647          * @return MediaHandlerFactory
 648          */
 649         public function getMediaHandlerFactory() {
 650                 return $this->getService( 'MediaHandlerFactory' );
 651         }
 652
 653         /**
 654          * @since 1.28
 655          * @return MimeAnalyzer
 656          */
 657         public function getMimeAnalyzer() {
 658                 return $this->getService( 'MimeAnalyzer' );
 659         }
 660
 661         /**
 662          * @since 1.32
 663          * @return OldRevisionImporter
 664          */
 665         public function getOldRevisionImporter() {
 666                 return $this->getService( 'OldRevisionImporter' );
 667         }
 668
 669         /**
 670          * @since 1.29
 671          * @return Parser
 672          */
 673         public function getParser() {
 674                 return $this->getService( 'Parser' );
 675         }
 676
 677         /**
 678          * @since 1.30
 679          * @return ParserCache
 680          */
 681         public function getParserCache() {
 682                 return $this->getService( 'ParserCache' );
 683         }
 684
 685         /**
 686          * @since 1.32
 687          * @return PasswordFactory
 688          */
 689         public function getPasswordFactory() {
 690                 return $this->getService( 'PasswordFactory' );
 691         }
 692
 693         /**
 694          * @since 1.32
 695          * @return IBufferingStatsdDataFactory
 696          */
 697         public function getPerDbNameStatsdDataFactory() {
 698                 return $this->getService( 'PerDbNameStatsdDataFactory' );
 699         }
 700
 701         /**
 702          * @since 1.31
 703          * @return PreferencesFactory
 704          */
 705         public function getPreferencesFactory() {
 706                 return $this->getService( 'PreferencesFactory' );
 707         }
 708
 709         /**
 710          * @since 1.28
 711          * @return ProxyLookup
 712          */
 713         public function getProxyLookup() {
 714                 return $this->getService( 'ProxyLookup' );
 715         }
 716
 717         /**
 718          * @since 1.29
 719          * @return \ReadOnlyMode
 720          */
 721         public function getReadOnlyMode() {
 722                 return $this->getService( 'ReadOnlyMode' );
 723         }
 724
 725         /**
 726          * @since 1.31
 727          * @return RevisionFactory
 728          */
 729         public function getRevisionFactory() {
 730                 return $this->getService( 'RevisionFactory' );
 731         }
 732
 733         /**
 734          * @since 1.31
 735          * @return RevisionLookup
 736          */
 737         public function getRevisionLookup() {
 738                 return $this->getService( 'RevisionLookup' );
 739         }
 740
 741         /**
 742          * @since 1.31
 743          * @return RevisionStore
 744          */
 745         public function getRevisionStore() {
 746                 return $this->getService( 'RevisionStore' );
 747         }
 748
 749         /**
 750          * @since 1.32
 751          * @return RevisionStoreFactory
 752          */
 753         public function getRevisionStoreFactory() {
 754                 return $this->getService( 'RevisionStoreFactory' );
 755         }
 756
 757         /**
 758          * @since 1.27
 759          * @return SearchEngine
 760          */
 761         public function newSearchEngine() {
 762                 // New engine object every time, since they keep state
 763                 return $this->getService( 'SearchEngineFactory' )->create();
 764         }
 765
 766         /**
 767          * @since 1.27
 768          * @return SearchEngineConfig
 769          */
 770         public function getSearchEngineConfig() {
 771                 return $this->getService( 'SearchEngineConfig' );
 772         }
 773
 774         /**
 775          * @since 1.27
 776          * @return SearchEngineFactory
 777          */
 778         public function getSearchEngineFactory() {
 779                 return $this->getService( 'SearchEngineFactory' );
 780         }
 781
 782         /**
 783          * @since 1.30
 784          * @return CommandFactory
 785          */
 786         public function getShellCommandFactory() {
 787                 return $this->getService( 'ShellCommandFactory' );
 788         }
 789
 790         /**
 791          * @since 1.27
 792          * @return SiteLookup
 793          */
 794         public function getSiteLookup() {
 795                 return $this->getService( 'SiteLookup' );
 796         }
 797
 798         /**
 799          * @since 1.27
 800          * @return SiteStore
 801          */
 802         public function getSiteStore() {
 803                 return $this->getService( 'SiteStore' );
 804         }
 805
 806         /**
 807          * @since 1.27
 808          * @return SkinFactory
 809          */
 810         public function getSkinFactory() {
 811                 return $this->getService( 'SkinFactory' );
 812         }
 813
 814         /**
 815          * @since 1.31
 816          * @return NameTableStore
 817          */
 818         public function getSlotRoleStore() {
 819                 return $this->getService( 'SlotRoleStore' );
 820         }
 821
 822         /**
 823          * @since 1.27
 824          * @return IBufferingStatsdDataFactory
 825          */
 826         public function getStatsdDataFactory() {
 827                 return $this->getService( 'StatsdDataFactory' );
 828         }
 829
 830         /**
 831          * @since 1.28
 832          * @return TitleFormatter
 833          */
 834         public function getTitleFormatter() {
 835                 return $this->getService( 'TitleFormatter' );
 836         }
 837
 838         /**
 839          * @since 1.28
 840          * @return TitleParser
 841          */
 842         public function getTitleParser() {
 843                 return $this->getService( 'TitleParser' );
 844         }
 845
 846         /**
 847          * @since 1.32
 848          * @return UploadRevisionImporter
 849          */
 850         public function getUploadRevisionImporter() {
 851                 return $this->getService( 'UploadRevisionImporter' );
 852         }
 853
 854         /**
 855          * @since 1.28
 856          * @return VirtualRESTServiceClient
 857          */
 858         public function getVirtualRESTServiceClient() {
 859                 return $this->getService( 'VirtualRESTServiceClient' );
 860         }
 861
 862         /**
 863          * @since 1.28
 864          * @return WatchedItemQueryService
 865          */
 866         public function getWatchedItemQueryService() {
 867                 return $this->getService( 'WatchedItemQueryService' );
 868         }
 869
 870         /**
 871          * @since 1.28
 872          * @return WatchedItemStoreInterface
 873          */
 874         public function getWatchedItemStore() {
 875                 return $this->getService( 'WatchedItemStore' );
 876         }
 877
 878         /**
 879          * @since 1.31
 880          * @return \OldRevisionImporter
 881          */
 882         public function getWikiRevisionOldRevisionImporter() {
 883                 return $this->getService( 'OldRevisionImporter' );
 884         }
 885
 886         /**
 887          * @since 1.31
 888          * @return \OldRevisionImporter
 889          */
 890         public function getWikiRevisionOldRevisionImporterNoUpdates() {
 891                 return $this->getService( 'WikiRevisionOldRevisionImporterNoUpdates' );
 892         }
 893
 894         /**
 895          * @since 1.31
 896          * @return \UploadRevisionImporter
 897          */
 898         public function getWikiRevisionUploadImporter() {
 899                 return $this->getService( 'UploadRevisionImporter' );
 900         }
 901
 902         ///////////////////////////////////////////////////////////////////////////
 903         // NOTE: When adding a service getter here, don't forget to add a test
 904         // case for it in MediaWikiServicesTest::provideGetters() and in
 905         // MediaWikiServicesTest::provideGetService()!
 906         ///////////////////////////////////////////////////////////////////////////
 907
 908 }