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| 1 | <?php |
| 2 | /** |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 16 | * http://www.gnu.org/copyleft/gpl.html |
| 17 | * |
| 18 | * @file |
| 19 | */ |
| 20 | |
| 21 | use MediaWiki\Deferred\DeferredUpdates; |
| 22 | use MediaWiki\Deferred\JobQueueEnqueueUpdate; |
| 23 | use MediaWiki\MediaWikiServices; |
| 24 | use Wikimedia\ObjectCache\WANObjectCache; |
| 25 | use Wikimedia\Rdbms\ReadOnlyMode; |
| 26 | use Wikimedia\Stats\IBufferingStatsdDataFactory; |
| 27 | use Wikimedia\UUID\GlobalIdGenerator; |
| 28 | |
| 29 | /** |
| 30 | * Handle enqueueing of background jobs. |
| 31 | * |
| 32 | * @warning This service class supports queuing jobs to foreign wikis via JobQueueGroupFactory, |
| 33 | * but other operations may be called for the local wiki only. Exceptions may be thrown if you |
| 34 | * attempt to inspect, pop, or execute a foreign wiki's job queue. |
| 35 | * |
| 36 | * @since 1.21 |
| 37 | * @ingroup JobQueue |
| 38 | */ |
| 39 | class JobQueueGroup { |
| 40 | /** @var MapCacheLRU */ |
| 41 | protected $cache; |
| 42 | |
| 43 | /** @var string Wiki domain ID */ |
| 44 | protected $domain; |
| 45 | /** @var ReadOnlyMode Read only mode */ |
| 46 | protected $readOnlyMode; |
| 47 | /** @var array|null */ |
| 48 | private $localJobClasses; |
| 49 | /** @var array */ |
| 50 | private $jobTypeConfiguration; |
| 51 | /** @var array */ |
| 52 | private $jobTypesExcludedFromDefaultQueue; |
| 53 | /** @var IBufferingStatsdDataFactory */ |
| 54 | private $statsdDataFactory; |
| 55 | /** @var WANObjectCache */ |
| 56 | private $wanCache; |
| 57 | /** @var GlobalIdGenerator */ |
| 58 | private $globalIdGenerator; |
| 59 | |
| 60 | /** @var array Map of (bucket => (queue => JobQueue, types => list of types) */ |
| 61 | protected $coalescedQueues; |
| 62 | |
| 63 | public const TYPE_DEFAULT = 1; // integer; jobs popped by default |
| 64 | private const TYPE_ANY = 2; // integer; any job |
| 65 | |
| 66 | public const USE_CACHE = 1; // integer; use process or persistent cache |
| 67 | |
| 68 | private const PROC_CACHE_TTL = 15; // integer; seconds |
| 69 | |
| 70 | /** |
| 71 | * @internal Use MediaWikiServices::getJobQueueGroupFactory |
| 72 | * |
| 73 | * @param string $domain Wiki domain ID |
| 74 | * @param ReadOnlyMode $readOnlyMode Read-only mode |
| 75 | * @param array|null $localJobClasses |
| 76 | * @param array $jobTypeConfiguration |
| 77 | * @param array $jobTypesExcludedFromDefaultQueue |
| 78 | * @param IBufferingStatsdDataFactory $statsdDataFactory |
| 79 | * @param WANObjectCache $wanCache |
| 80 | * @param GlobalIdGenerator $globalIdGenerator |
| 81 | * |
| 82 | */ |
| 83 | public function __construct( |
| 84 | $domain, |
| 85 | ReadOnlyMode $readOnlyMode, |
| 86 | ?array $localJobClasses, |
| 87 | array $jobTypeConfiguration, |
| 88 | array $jobTypesExcludedFromDefaultQueue, |
| 89 | IBufferingStatsdDataFactory $statsdDataFactory, |
| 90 | WANObjectCache $wanCache, |
| 91 | GlobalIdGenerator $globalIdGenerator |
| 92 | ) { |
| 93 | $this->domain = $domain; |
| 94 | $this->readOnlyMode = $readOnlyMode; |
| 95 | $this->cache = new MapCacheLRU( 10 ); |
| 96 | $this->localJobClasses = $localJobClasses; |
| 97 | $this->jobTypeConfiguration = $jobTypeConfiguration; |
| 98 | $this->jobTypesExcludedFromDefaultQueue = $jobTypesExcludedFromDefaultQueue; |
| 99 | $this->statsdDataFactory = $statsdDataFactory; |
| 100 | $this->wanCache = $wanCache; |
| 101 | $this->globalIdGenerator = $globalIdGenerator; |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * Get the job queue object for a given queue type |
| 106 | * |
| 107 | * @param string $type |
| 108 | * @return JobQueue |
| 109 | */ |
| 110 | public function get( $type ) { |
| 111 | $conf = [ 'domain' => $this->domain, 'type' => $type ]; |
| 112 | $conf += $this->jobTypeConfiguration[$type] ?? $this->jobTypeConfiguration['default']; |
| 113 | if ( !isset( $conf['readOnlyReason'] ) ) { |
| 114 | $conf['readOnlyReason'] = $this->readOnlyMode->getConfiguredReason(); |
| 115 | } |
| 116 | |
| 117 | $conf['stats'] = $this->statsdDataFactory; |
| 118 | $conf['wanCache'] = $this->wanCache; |
| 119 | $conf['idGenerator'] = $this->globalIdGenerator; |
| 120 | |
| 121 | return JobQueue::factory( $conf ); |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * Insert jobs into the respective queues of which they belong |
| 126 | * |
| 127 | * This inserts the jobs into the queue specified by $wgJobTypeConf |
| 128 | * and updates the aggregate job queue information cache as needed. |
| 129 | * |
| 130 | * @param IJobSpecification|IJobSpecification[] $jobs A single Job or a list of Jobs |
| 131 | * @return void |
| 132 | */ |
| 133 | public function push( $jobs ) { |
| 134 | $jobs = is_array( $jobs ) ? $jobs : [ $jobs ]; |
| 135 | if ( $jobs === [] ) { |
| 136 | return; |
| 137 | } |
| 138 | |
| 139 | $this->assertValidJobs( $jobs ); |
| 140 | |
| 141 | $jobsByType = []; // (job type => list of jobs) |
| 142 | foreach ( $jobs as $job ) { |
| 143 | $type = $job->getType(); |
| 144 | if ( isset( $this->jobTypeConfiguration[$type] ) ) { |
| 145 | $jobsByType[$type][] = $job; |
| 146 | } else { |
| 147 | if ( |
| 148 | isset( $this->jobTypeConfiguration['default']['typeAgnostic'] ) && |
| 149 | $this->jobTypeConfiguration['default']['typeAgnostic'] |
| 150 | ) { |
| 151 | $jobsByType['default'][] = $job; |
| 152 | } else { |
| 153 | $jobsByType[$type][] = $job; |
| 154 | } |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | foreach ( $jobsByType as $type => $jobs ) { |
| 159 | $this->get( $type )->push( $jobs ); |
| 160 | } |
| 161 | |
| 162 | if ( $this->cache->hasField( 'queues-ready', 'list' ) ) { |
| 163 | $list = $this->cache->getField( 'queues-ready', 'list' ); |
| 164 | if ( count( array_diff( array_keys( $jobsByType ), $list ) ) ) { |
| 165 | $this->cache->clear( 'queues-ready' ); |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | $cache = MediaWikiServices::getInstance()->getObjectCacheFactory()->getLocalClusterInstance(); |
| 170 | $cache->set( |
| 171 | $cache->makeGlobalKey( 'jobqueue', $this->domain, 'hasjobs', self::TYPE_ANY ), |
| 172 | 'true', |
| 173 | 15 |
| 174 | ); |
| 175 | if ( array_diff( array_keys( $jobsByType ), $this->jobTypesExcludedFromDefaultQueue ) ) { |
| 176 | $cache->set( |
| 177 | $cache->makeGlobalKey( 'jobqueue', $this->domain, 'hasjobs', self::TYPE_DEFAULT ), |
| 178 | 'true', |
| 179 | 15 |
| 180 | ); |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | /** |
| 185 | * Buffer jobs for insertion via push() or call it now if in CLI mode |
| 186 | * |
| 187 | * @param IJobSpecification|IJobSpecification[] $jobs A single Job or a list of Jobs |
| 188 | * @return void |
| 189 | * @since 1.26 |
| 190 | */ |
| 191 | public function lazyPush( $jobs ) { |
| 192 | if ( PHP_SAPI === 'cli' || PHP_SAPI === 'phpdbg' ) { |
| 193 | $this->push( $jobs ); |
| 194 | return; |
| 195 | } |
| 196 | |
| 197 | $jobs = is_array( $jobs ) ? $jobs : [ $jobs ]; |
| 198 | |
| 199 | // Throw errors now instead of on push(), when other jobs may be buffered |
| 200 | $this->assertValidJobs( $jobs ); |
| 201 | |
| 202 | DeferredUpdates::addUpdate( new JobQueueEnqueueUpdate( $this->domain, $jobs ) ); |
| 203 | } |
| 204 | |
| 205 | /** |
| 206 | * Pop one job off a job queue |
| 207 | * |
| 208 | * @warning May not be called on foreign wikis! |
| 209 | * |
| 210 | * This pops a job off a queue as specified by $wgJobTypeConf and |
| 211 | * updates the aggregate job queue information cache as needed. |
| 212 | * |
| 213 | * @param int|string $qtype JobQueueGroup::TYPE_* constant or job type string |
| 214 | * @param int $flags Bitfield of JobQueueGroup::USE_* constants |
| 215 | * @param array $ignored List of job types to ignore |
| 216 | * @return RunnableJob|false Returns false on failure |
| 217 | * @throws JobQueueError |
| 218 | */ |
| 219 | public function pop( $qtype = self::TYPE_DEFAULT, $flags = 0, array $ignored = [] ) { |
| 220 | $job = false; |
| 221 | |
| 222 | if ( !$this->localJobClasses ) { |
| 223 | throw new JobQueueError( |
| 224 | "Cannot pop '{$qtype}' job off foreign '{$this->domain}' wiki queue." ); |
| 225 | } |
| 226 | if ( is_string( $qtype ) && !isset( $this->localJobClasses[$qtype] ) ) { |
| 227 | // Do not pop jobs if there is no class for the queue type |
| 228 | throw new JobQueueError( "Unrecognized job type '$qtype'." ); |
| 229 | } |
| 230 | |
| 231 | if ( is_string( $qtype ) ) { // specific job type |
| 232 | if ( !in_array( $qtype, $ignored ) ) { |
| 233 | $job = $this->get( $qtype )->pop(); |
| 234 | } |
| 235 | } else { // any job in the "default" jobs types |
| 236 | if ( $flags & self::USE_CACHE ) { |
| 237 | if ( !$this->cache->hasField( 'queues-ready', 'list', self::PROC_CACHE_TTL ) ) { |
| 238 | $this->cache->setField( 'queues-ready', 'list', $this->getQueuesWithJobs() ); |
| 239 | } |
| 240 | $types = $this->cache->getField( 'queues-ready', 'list' ); |
| 241 | } else { |
| 242 | $types = $this->getQueuesWithJobs(); |
| 243 | } |
| 244 | |
| 245 | if ( $qtype == self::TYPE_DEFAULT ) { |
| 246 | $types = array_intersect( $types, $this->getDefaultQueueTypes() ); |
| 247 | } |
| 248 | |
| 249 | $types = array_diff( $types, $ignored ); // avoid selected types |
| 250 | shuffle( $types ); // avoid starvation |
| 251 | |
| 252 | foreach ( $types as $type ) { // for each queue... |
| 253 | $job = $this->get( $type )->pop(); |
| 254 | if ( $job ) { // found |
| 255 | break; |
| 256 | } else { // not found |
| 257 | $this->cache->clear( 'queues-ready' ); |
| 258 | } |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | return $job; |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * Acknowledge that a job was completed |
| 267 | * |
| 268 | * @param RunnableJob $job |
| 269 | * @return void |
| 270 | */ |
| 271 | public function ack( RunnableJob $job ) { |
| 272 | $this->get( $job->getType() )->ack( $job ); |
| 273 | } |
| 274 | |
| 275 | /** |
| 276 | * Register the "root job" of a given job into the queue for de-duplication. |
| 277 | * This should only be called right *after* all the new jobs have been inserted. |
| 278 | * |
| 279 | * @deprecated since 1.40 |
| 280 | * @param RunnableJob $job |
| 281 | * @return bool |
| 282 | */ |
| 283 | public function deduplicateRootJob( RunnableJob $job ) { |
| 284 | wfDeprecated( __METHOD__, '1.40' ); |
| 285 | return true; |
| 286 | } |
| 287 | |
| 288 | /** |
| 289 | * Wait for any replica DBs or backup queue servers to catch up. |
| 290 | * |
| 291 | * This does nothing for certain queue classes. |
| 292 | * |
| 293 | * @deprecated since 1.41, use JobQueue::waitForBackups() instead. |
| 294 | * |
| 295 | * @return void |
| 296 | */ |
| 297 | public function waitForBackups() { |
| 298 | wfDeprecated( __METHOD__, '1.41' ); |
| 299 | // Try to avoid doing this more than once per queue storage medium |
| 300 | foreach ( $this->jobTypeConfiguration as $type => $conf ) { |
| 301 | $this->get( $type )->waitForBackups(); |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | /** |
| 306 | * Get the list of queue types |
| 307 | * |
| 308 | * @warning May not be called on foreign wikis! |
| 309 | * |
| 310 | * @return string[] |
| 311 | */ |
| 312 | public function getQueueTypes() { |
| 313 | if ( !$this->localJobClasses ) { |
| 314 | throw new JobQueueError( 'Cannot inspect job queue from foreign wiki' ); |
| 315 | } |
| 316 | return array_keys( $this->localJobClasses ); |
| 317 | } |
| 318 | |
| 319 | /** |
| 320 | * Get the list of default queue types |
| 321 | * |
| 322 | * @warning May not be called on foreign wikis! |
| 323 | * |
| 324 | * @return string[] |
| 325 | */ |
| 326 | public function getDefaultQueueTypes() { |
| 327 | return array_diff( $this->getQueueTypes(), $this->jobTypesExcludedFromDefaultQueue ); |
| 328 | } |
| 329 | |
| 330 | /** |
| 331 | * Check if there are any queues with jobs (this is cached) |
| 332 | * |
| 333 | * @warning May not be called on foreign wikis! |
| 334 | * |
| 335 | * @since 1.23 |
| 336 | * @param int $type JobQueueGroup::TYPE_* constant |
| 337 | * @return bool |
| 338 | */ |
| 339 | public function queuesHaveJobs( $type = self::TYPE_ANY ) { |
| 340 | $cache = MediaWikiServices::getInstance()->getObjectCacheFactory()->getLocalClusterInstance(); |
| 341 | $key = $cache->makeGlobalKey( 'jobqueue', $this->domain, 'hasjobs', $type ); |
| 342 | |
| 343 | $value = $cache->get( $key ); |
| 344 | if ( $value === false ) { |
| 345 | $queues = $this->getQueuesWithJobs(); |
| 346 | if ( $type == self::TYPE_DEFAULT ) { |
| 347 | $queues = array_intersect( $queues, $this->getDefaultQueueTypes() ); |
| 348 | } |
| 349 | $value = count( $queues ) ? 'true' : 'false'; |
| 350 | $cache->add( $key, $value, 15 ); |
| 351 | } |
| 352 | |
| 353 | return ( $value === 'true' ); |
| 354 | } |
| 355 | |
| 356 | /** |
| 357 | * Get the list of job types that have non-empty queues |
| 358 | * |
| 359 | * @warning May not be called on foreign wikis! |
| 360 | * |
| 361 | * @return string[] List of job types that have non-empty queues |
| 362 | */ |
| 363 | public function getQueuesWithJobs() { |
| 364 | $types = []; |
| 365 | foreach ( $this->getCoalescedQueues() as $info ) { |
| 366 | /** @var JobQueue $queue */ |
| 367 | $queue = $info['queue']; |
| 368 | $nonEmpty = $queue->getSiblingQueuesWithJobs( $this->getQueueTypes() ); |
| 369 | if ( is_array( $nonEmpty ) ) { // batching features supported |
| 370 | $types = array_merge( $types, $nonEmpty ); |
| 371 | } else { // we have to go through the queues in the bucket one-by-one |
| 372 | foreach ( $info['types'] as $type ) { |
| 373 | if ( !$this->get( $type )->isEmpty() ) { |
| 374 | $types[] = $type; |
| 375 | } |
| 376 | } |
| 377 | } |
| 378 | } |
| 379 | |
| 380 | return $types; |
| 381 | } |
| 382 | |
| 383 | /** |
| 384 | * Get the size of the queues for a list of job types |
| 385 | * |
| 386 | * @warning May not be called on foreign wikis! |
| 387 | * |
| 388 | * @return int[] Map of (job type => size) |
| 389 | */ |
| 390 | public function getQueueSizes() { |
| 391 | $sizeMap = []; |
| 392 | foreach ( $this->getCoalescedQueues() as $info ) { |
| 393 | /** @var JobQueue $queue */ |
| 394 | $queue = $info['queue']; |
| 395 | $sizes = $queue->getSiblingQueueSizes( $this->getQueueTypes() ); |
| 396 | if ( is_array( $sizes ) ) { // batching features supported |
| 397 | $sizeMap += $sizes; |
| 398 | } else { // we have to go through the queues in the bucket one-by-one |
| 399 | foreach ( $info['types'] as $type ) { |
| 400 | $sizeMap[$type] = $this->get( $type )->getSize(); |
| 401 | } |
| 402 | } |
| 403 | } |
| 404 | |
| 405 | return $sizeMap; |
| 406 | } |
| 407 | |
| 408 | /** |
| 409 | * @return array[] |
| 410 | * @phan-return array<string,array{queue:JobQueue,types:array<string,class-string>}> |
| 411 | */ |
| 412 | protected function getCoalescedQueues() { |
| 413 | if ( $this->coalescedQueues === null ) { |
| 414 | $this->coalescedQueues = []; |
| 415 | foreach ( $this->jobTypeConfiguration as $type => $conf ) { |
| 416 | $conf['domain'] = $this->domain; |
| 417 | $conf['type'] = 'null'; |
| 418 | $conf['stats'] = $this->statsdDataFactory; |
| 419 | $conf['wanCache'] = $this->wanCache; |
| 420 | $conf['idGenerator'] = $this->globalIdGenerator; |
| 421 | |
| 422 | $queue = JobQueue::factory( $conf ); |
| 423 | $loc = $queue->getCoalesceLocationInternal(); |
| 424 | if ( !isset( $this->coalescedQueues[$loc] ) ) { |
| 425 | $this->coalescedQueues[$loc]['queue'] = $queue; |
| 426 | $this->coalescedQueues[$loc]['types'] = []; |
| 427 | } |
| 428 | if ( $type === 'default' ) { |
| 429 | $this->coalescedQueues[$loc]['types'] = array_merge( |
| 430 | $this->coalescedQueues[$loc]['types'], |
| 431 | array_diff( $this->getQueueTypes(), array_keys( $this->jobTypeConfiguration ) ) |
| 432 | ); |
| 433 | } else { |
| 434 | $this->coalescedQueues[$loc]['types'][] = $type; |
| 435 | } |
| 436 | } |
| 437 | } |
| 438 | |
| 439 | return $this->coalescedQueues; |
| 440 | } |
| 441 | |
| 442 | private function assertValidJobs( array $jobs ) { |
| 443 | foreach ( $jobs as $job ) { |
| 444 | if ( !( $job instanceof IJobSpecification ) ) { |
| 445 | $type = get_debug_type( $job ); |
| 446 | throw new InvalidArgumentException( "Expected IJobSpecification objects, got " . $type ); |
| 447 | } |
| 448 | } |
| 449 | } |
| 450 | } |