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| 1 | <?php |
| 2 | declare(strict_types=1); |
| 3 | /** |
| 4 | * Pop PHP Framework (https://www.popphp.org/) |
| 5 | * |
| 6 | * @link https://github.com/popphp/popphp-framework |
| 7 | * @author Nick Sagona, III <nick@popphp.org> |
| 8 | * @copyright Copyright (c) 2009-2026 Nick Sagona, III |
| 9 | * @license https://www.popphp.org/license New BSD License |
| 10 | */ |
| 11 | |
| 12 | /** |
| 13 | * @namespace |
| 14 | */ |
| 15 | namespace Pop\Queue; |
| 16 | |
| 17 | use Pop\Application; |
| 18 | use Pop\Event\Manager as EventManager; |
| 19 | use Pop\Queue\Adapter\AdapterInterface; |
| 20 | use Pop\Queue\Adapter\Memory; |
| 21 | use Pop\Queue\Adapter\TaskAdapterInterface; |
| 22 | use Pop\Queue\Process\AbstractJob; |
| 23 | use Pop\Queue\Process\Task; |
| 24 | use Pop\Queue\Process\TimeoutException; |
| 25 | |
| 26 | /** |
| 27 | * Queue class |
| 28 | * |
| 29 | * @category Pop |
| 30 | * @package Pop\Queue |
| 31 | * @author Nick Sagona, III <nick@popphp.org> |
| 32 | * @copyright Copyright (c) 2009-2026 Nick Sagona, III |
| 33 | * @license https://www.popphp.org/license New BSD License |
| 34 | * @version 3.0.0 |
| 35 | */ |
| 36 | class Queue extends AbstractQueue |
| 37 | { |
| 38 | |
| 39 | /** |
| 40 | * Queue priority constants |
| 41 | */ |
| 42 | const FIFO = 'FIFO'; // Same as LILO |
| 43 | const FILO = 'FILO'; // Same as LIFO |
| 44 | |
| 45 | /** |
| 46 | * Event manager, for lifecycle observability hooks (queue.job.*, queue.task.*). |
| 47 | * If not set, and an Application with its own event manager is passed into |
| 48 | * work()/run(), that Application's event manager is used instead - see |
| 49 | * triggerEvent(). If neither is available, event firing is a silent no-op. |
| 50 | * @var ?EventManager |
| 51 | */ |
| 52 | protected ?EventManager $events = null; |
| 53 | |
| 54 | /** |
| 55 | * Constructor |
| 56 | * |
| 57 | * Instantiate the queue object |
| 58 | * |
| 59 | * @param string $name |
| 60 | * @param AdapterInterface|TaskAdapterInterface $adapter |
| 61 | * @param ?string $priority |
| 62 | */ |
| 63 | public function __construct(string $name, AdapterInterface|TaskAdapterInterface $adapter, ?string $priority = null) |
| 64 | { |
| 65 | $this->setName($name); |
| 66 | $this->setAdapter($adapter); |
| 67 | if ($priority !== null) { |
| 68 | $this->setPriority($priority); |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * Create the queue object |
| 74 | * |
| 75 | * @param string $name |
| 76 | * @param AdapterInterface|TaskAdapterInterface $adapter |
| 77 | * @param ?string $priority |
| 78 | * @return Queue |
| 79 | */ |
| 80 | public static function create( |
| 81 | string $name, AdapterInterface|TaskAdapterInterface $adapter, ?string $priority = null |
| 82 | ): Queue |
| 83 | { |
| 84 | return new self($name, $adapter, $priority); |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * Create a Memory-backed queue for testing - a fake, in the sense |
| 89 | * familiar from other PHP frameworks' testing conventions. Note |
| 90 | * Memory's own constructor takes $leaseSeconds before $priority |
| 91 | * (Memory predates this method and that argument order is documented, |
| 92 | * pre-existing behavior elsewhere in this codebase) - fake()'s own |
| 93 | * parameter order matches create()'s $priority-before-lease convention |
| 94 | * instead, and translates between the two internally, so a caller of |
| 95 | * fake() never needs to know Memory's own argument order. |
| 96 | * |
| 97 | * @param string $name |
| 98 | * @param ?string $priority |
| 99 | * @param int $leaseSeconds |
| 100 | * @return Queue |
| 101 | */ |
| 102 | public static function fake(string $name = 'pop-queue', ?string $priority = null, int $leaseSeconds = 60): Queue |
| 103 | { |
| 104 | return new self($name, new Memory($leaseSeconds, $priority)); |
| 105 | } |
| 106 | |
| 107 | /** |
| 108 | * Set queue priority |
| 109 | * |
| 110 | * @param string $priority |
| 111 | * @return Queue |
| 112 | */ |
| 113 | public function setPriority(string $priority = 'FIFO'): Queue |
| 114 | { |
| 115 | $this->adapter->setPriority($priority); |
| 116 | return $this; |
| 117 | } |
| 118 | |
| 119 | /** |
| 120 | * Get queue priority |
| 121 | * |
| 122 | * @return string |
| 123 | */ |
| 124 | public function getPriority(): string |
| 125 | { |
| 126 | return $this->adapter->getPriority(); |
| 127 | } |
| 128 | |
| 129 | /** |
| 130 | * Is FIFO |
| 131 | * |
| 132 | * @return bool |
| 133 | */ |
| 134 | public function isFifo(): bool |
| 135 | { |
| 136 | return $this->adapter->isFifo(); |
| 137 | } |
| 138 | |
| 139 | /** |
| 140 | * Is FILO |
| 141 | * |
| 142 | * @return bool |
| 143 | */ |
| 144 | public function isFilo(): bool |
| 145 | { |
| 146 | return $this->adapter->isFilo(); |
| 147 | } |
| 148 | |
| 149 | /** |
| 150 | * Is LILO (alias to FIFO) |
| 151 | * |
| 152 | * @return bool |
| 153 | */ |
| 154 | public function isLilo(): bool |
| 155 | { |
| 156 | return $this->adapter->isLilo(); |
| 157 | } |
| 158 | |
| 159 | /** |
| 160 | * Is LIFO (alias to FILO) |
| 161 | * |
| 162 | * @return bool |
| 163 | */ |
| 164 | public function isLifo(): bool |
| 165 | { |
| 166 | return $this->adapter->isLifo(); |
| 167 | } |
| 168 | |
| 169 | /** |
| 170 | * Set event manager |
| 171 | * |
| 172 | * @param EventManager $events |
| 173 | * @return Queue |
| 174 | */ |
| 175 | public function setEvents(EventManager $events): Queue |
| 176 | { |
| 177 | $this->events = $events; |
| 178 | return $this; |
| 179 | } |
| 180 | |
| 181 | /** |
| 182 | * Get event manager |
| 183 | * |
| 184 | * @return ?EventManager |
| 185 | */ |
| 186 | public function getEvents(): ?EventManager |
| 187 | { |
| 188 | return $this->events; |
| 189 | } |
| 190 | |
| 191 | /** |
| 192 | * Get event manager (alias) |
| 193 | * |
| 194 | * @return ?EventManager |
| 195 | */ |
| 196 | public function events(): ?EventManager |
| 197 | { |
| 198 | return $this->events; |
| 199 | } |
| 200 | |
| 201 | /** |
| 202 | * Has event manager |
| 203 | * |
| 204 | * @return bool |
| 205 | */ |
| 206 | public function hasEvents(): bool |
| 207 | { |
| 208 | return ($this->events !== null); |
| 209 | } |
| 210 | |
| 211 | /** |
| 212 | * Trigger a lifecycle event. Uses this Queue's own event manager if one |
| 213 | * is set via setEvents(); otherwise falls back to $application's event |
| 214 | * manager if one was passed in and has events registered; otherwise |
| 215 | * does nothing. Never throws on its own account - if the resolved |
| 216 | * manager's trigger() call throws (e.g. a listener's own code throws), |
| 217 | * that exception propagates to the caller exactly as any other |
| 218 | * uncaught exception would. |
| 219 | * |
| 220 | * @param string $name |
| 221 | * @param array $params |
| 222 | * @param ?Application $application |
| 223 | * @return void |
| 224 | */ |
| 225 | protected function triggerEvent(string $name, array $params, ?Application $application = null): void |
| 226 | { |
| 227 | if ($this->hasEvents()) { |
| 228 | $this->events->trigger($name, $params); |
| 229 | } else if (($application !== null) && ($application->events() !== null)) { |
| 230 | $application->events()->trigger($name, $params); |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | /** |
| 235 | * Add job |
| 236 | * |
| 237 | * @param AbstractJob $job |
| 238 | * @param ?int $maxAttempts |
| 239 | * @return Queue |
| 240 | */ |
| 241 | public function addJob(AbstractJob $job, ?int $maxAttempts = null): Queue |
| 242 | { |
| 243 | if ($maxAttempts !== null) { |
| 244 | $job->setMaxAttempts($maxAttempts); |
| 245 | } |
| 246 | $this->adapter->push($job); |
| 247 | |
| 248 | return $this; |
| 249 | } |
| 250 | |
| 251 | /** |
| 252 | * Add jobs |
| 253 | * |
| 254 | * @param array $jobs |
| 255 | * @param ?int $maxAttempts |
| 256 | * @return Queue |
| 257 | */ |
| 258 | public function addJobs(array $jobs, ?int $maxAttempts = null): Queue |
| 259 | { |
| 260 | foreach ($jobs as $job) { |
| 261 | $this->addJob($job, $maxAttempts); |
| 262 | } |
| 263 | return $this; |
| 264 | } |
| 265 | |
| 266 | /** |
| 267 | * Add task (alias) |
| 268 | * |
| 269 | * @param Task $task |
| 270 | * @param ?int $maxAttempts |
| 271 | * @param ?int $gracePeriod |
| 272 | * @throws Exception |
| 273 | * @return Queue |
| 274 | */ |
| 275 | public function addTask(Task $task, ?int $maxAttempts = null, ?int $gracePeriod = null): Queue |
| 276 | { |
| 277 | if (!($this->adapter instanceof TaskAdapterInterface)) { |
| 278 | throw new Exception('Error: That queue adapter does not support scheduled tasks'); |
| 279 | } |
| 280 | if ($maxAttempts !== null) { |
| 281 | $task->setMaxAttempts($maxAttempts); |
| 282 | } |
| 283 | if ($gracePeriod !== null) { |
| 284 | $task->setGracePeriod($gracePeriod); |
| 285 | } |
| 286 | |
| 287 | $this->adapter->schedule($task); |
| 288 | |
| 289 | return $this; |
| 290 | } |
| 291 | |
| 292 | /** |
| 293 | * Add tasks |
| 294 | * |
| 295 | * @param array $tasks |
| 296 | * @param ?int $maxAttempts |
| 297 | * @throws Exception |
| 298 | * @return Queue |
| 299 | */ |
| 300 | public function addTasks(array $tasks, ?int $maxAttempts = null): Queue |
| 301 | { |
| 302 | foreach ($tasks as $task) { |
| 303 | $this->addTask($task, $maxAttempts); |
| 304 | } |
| 305 | return $this; |
| 306 | } |
| 307 | |
| 308 | /** |
| 309 | * Work next job |
| 310 | * |
| 311 | * @param ?Application $application |
| 312 | * @return ?AbstractJob |
| 313 | */ |
| 314 | public function work(?Application $application = null): ?AbstractJob |
| 315 | { |
| 316 | $job = $this->adapter->reserve(); |
| 317 | if ($job === null) { |
| 318 | return null; |
| 319 | } |
| 320 | |
| 321 | if (!$job->isValid()) { |
| 322 | $reason = 'Exceeded max attempts or expired before execution'; |
| 323 | $this->adapter->bury($job, $reason); |
| 324 | $this->triggerEvent('queue.job.buried', ['job' => $job, 'queue' => $this, 'reason' => $reason], $application); |
| 325 | return $job; |
| 326 | } |
| 327 | |
| 328 | $this->triggerEvent('queue.job.pre', ['job' => $job, 'queue' => $this], $application); |
| 329 | |
| 330 | $exception = null; |
| 331 | $buried = false; |
| 332 | |
| 333 | try { |
| 334 | $this->runWithTimeout($job, $application); |
| 335 | $job->complete(); |
| 336 | $this->adapter->delete($job); |
| 337 | } catch (\Throwable $e) { |
| 338 | $exception = $e; |
| 339 | $job->failed($e->getMessage()); |
| 340 | if ($job->isValid()) { |
| 341 | $this->adapter->release($job); |
| 342 | } else { |
| 343 | $buried = true; |
| 344 | $this->adapter->bury($job, $e->getMessage()); |
| 345 | } |
| 346 | } |
| 347 | |
| 348 | if ($exception === null) { |
| 349 | $this->triggerEvent('queue.job.post', ['job' => $job, 'queue' => $this], $application); |
| 350 | } else { |
| 351 | $this->triggerEvent('queue.job.failed', ['job' => $job, 'queue' => $this, 'exception' => $exception], $application); |
| 352 | if ($buried) { |
| 353 | $this->triggerEvent('queue.job.buried', ['job' => $job, 'queue' => $this, 'reason' => $exception->getMessage()], $application); |
| 354 | } |
| 355 | } |
| 356 | |
| 357 | return $job; |
| 358 | } |
| 359 | |
| 360 | /** |
| 361 | * Run a job, enforcing its soft timeout when ext-pcntl is available. |
| 362 | * Exec-type jobs are exempt from this pcntl-based alarm entirely - |
| 363 | * AbstractJob::runExec() wires the job's timeout directly into |
| 364 | * Symfony\Process's own setTimeout(), which is both more precise and |
| 365 | * (unlike a pcntl alarm racing against a raw exec() call) actually |
| 366 | * capable of killing the spawned child process on expiry. Layering a |
| 367 | * second, competing pcntl alarm on top for the same job risks |
| 368 | * interrupting Process's own internal wait()/kill logic mid-flight if |
| 369 | * the alarm fires first, defeating the reliable-child-termination |
| 370 | * guarantee this task exists to add. |
| 371 | * |
| 372 | * @param AbstractJob $job |
| 373 | * @param ?Application $application |
| 374 | * @return mixed |
| 375 | */ |
| 376 | protected function runWithTimeout(AbstractJob $job, ?Application $application): mixed |
| 377 | { |
| 378 | if (!$job->hasTimeout() || !extension_loaded('pcntl') || $job->hasExec()) { |
| 379 | return $job->run($application); |
| 380 | } |
| 381 | |
| 382 | pcntl_async_signals(true); |
| 383 | pcntl_signal(SIGALRM, function() use ($job) { |
| 384 | throw new TimeoutException( |
| 385 | 'Error: Job ' . $job->getJobId() . ' exceeded its ' . $job->getTimeout() . ' second timeout.' |
| 386 | ); |
| 387 | }); |
| 388 | pcntl_alarm($job->getTimeout()); |
| 389 | |
| 390 | try { |
| 391 | return $job->run($application); |
| 392 | } finally { |
| 393 | pcntl_alarm(0); |
| 394 | pcntl_signal(SIGALRM, SIG_DFL); |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | /** |
| 399 | * Evaluate every given task exactly once against the current time and |
| 400 | * run the ones that are due, returning the ones that ran (successfully |
| 401 | * or not) keyed by job ID. Coarse (non-sub-minute) tasks are always |
| 402 | * considered; pass $onlySubMinute = true to skip them (used by run()'s |
| 403 | * per-second tick loop, where a coarse task's single evaluation already |
| 404 | * happened on the shared first pass and doesn't need repeating). |
| 405 | * |
| 406 | * Before running a due task, atomically claims it for the current |
| 407 | * due-window via the adapter (claimTaskRun()) - if another worker |
| 408 | * sharing the same adapter storage already claimed this task's window, |
| 409 | * this call skips it silently rather than running it a second time. |
| 410 | * |
| 411 | * @param array $tasks taskId => Task |
| 412 | * @param ?Application $application |
| 413 | * @param bool $onlySubMinute |
| 414 | * @return array jobId => Task, for every task that ran this pass |
| 415 | */ |
| 416 | public function evaluateTasksOnce(array $tasks, ?Application $application, bool $onlySubMinute = false): array |
| 417 | { |
| 418 | if (!($this->adapter instanceof TaskAdapterInterface)) { |
| 419 | return []; |
| 420 | } |
| 421 | |
| 422 | $ran = []; |
| 423 | |
| 424 | foreach ($tasks as $taskId => $task) { |
| 425 | $isSubMinute = $task->cron()->hasSeconds(); |
| 426 | |
| 427 | if ($onlySubMinute && !$isSubMinute) { |
| 428 | continue; |
| 429 | } |
| 430 | |
| 431 | if ($isSubMinute) { |
| 432 | $task->__wakeup(); |
| 433 | } |
| 434 | |
| 435 | if ((!$task->isValid()) || (!$task->cron()->evaluate())) { |
| 436 | continue; |
| 437 | } |
| 438 | |
| 439 | $window = $isSubMinute ? (string)time() : (string)intdiv(time(), 60); |
| 440 | if (!$this->adapter->claimTaskRun($taskId, $window)) { |
| 441 | // Another worker already claimed this task's current |
| 442 | // due-window - not a failure, just not ours to run. |
| 443 | continue; |
| 444 | } |
| 445 | |
| 446 | $this->triggerEvent('queue.task.pre', ['task' => $task, 'queue' => $this], $application); |
| 447 | |
| 448 | $exception = null; |
| 449 | |
| 450 | try { |
| 451 | $task->run($application); |
| 452 | $task->complete(); |
| 453 | if (!$isSubMinute) { |
| 454 | $this->adapter->updateTask($task); |
| 455 | } |
| 456 | } catch (\Exception $e) { |
| 457 | $exception = $e; |
| 458 | $task->failed($e->getMessage()); |
| 459 | if ($isSubMinute) { |
| 460 | $this->adapter->removeTask($taskId); |
| 461 | $this->adapter->schedule($task); |
| 462 | $this->adapter->claimTaskRun($taskId, $window); |
| 463 | } else { |
| 464 | $this->adapter->updateTask($task); |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | $ran[$task->getJobId()] = $task; |
| 469 | |
| 470 | if ($exception === null) { |
| 471 | $this->triggerEvent('queue.task.post', ['task' => $task, 'queue' => $this], $application); |
| 472 | } else { |
| 473 | $this->triggerEvent('queue.task.failed', ['task' => $task, 'queue' => $this, 'exception' => $exception], $application); |
| 474 | } |
| 475 | } |
| 476 | |
| 477 | return $ran; |
| 478 | } |
| 479 | |
| 480 | /** |
| 481 | * Fetch every currently scheduled task from the adapter, once. Returns |
| 482 | * an empty array if the adapter doesn't support tasks |
| 483 | * (TaskAdapterInterface) or has none scheduled - callers don't need to |
| 484 | * duplicate that guard. |
| 485 | * |
| 486 | * @return array taskId => Task |
| 487 | */ |
| 488 | public function getScheduledTasks(): array |
| 489 | { |
| 490 | if (!($this->adapter instanceof TaskAdapterInterface)) { |
| 491 | return []; |
| 492 | } |
| 493 | |
| 494 | // One call rather than a listing followed by a fetch per task. That |
| 495 | // pattern cost a round trip per scheduled task, and this runs on every |
| 496 | // run() - so once a minute per worker per queue, forever. The hasTasks() |
| 497 | // pre-check went with it: it was a second round trip asking a question |
| 498 | // this call already answers by coming back empty. |
| 499 | return $this->adapter->getAllTasks(); |
| 500 | } |
| 501 | |
| 502 | /** |
| 503 | * Run schedule |
| 504 | * |
| 505 | * Evaluates every scheduled task fairly: all tasks get one shared |
| 506 | * evaluation pass immediately, then - only if at least one sub-minute |
| 507 | * task exists - up to 59 more passes (one per second) considering only |
| 508 | * the sub-minute tasks. This ensures no single task's per-tick work |
| 509 | * blocks any other task's evaluation on the same tick. |
| 510 | * |
| 511 | * @param ?Application $application |
| 512 | * @throws Process\Exception |
| 513 | * @return array |
| 514 | */ |
| 515 | public function run(?Application $application = null): array |
| 516 | { |
| 517 | $tasks = []; |
| 518 | |
| 519 | $scheduledTasks = $this->getScheduledTasks(); |
| 520 | if (empty($scheduledTasks)) { |
| 521 | return $tasks; |
| 522 | } |
| 523 | |
| 524 | foreach ($this->evaluateTasksOnce($scheduledTasks, $application) as $jobId => $task) { |
| 525 | $tasks[$jobId] = $task; |
| 526 | } |
| 527 | |
| 528 | $hasSubMinute = false; |
| 529 | foreach ($scheduledTasks as $task) { |
| 530 | if ($task->cron()->hasSeconds()) { |
| 531 | $hasSubMinute = true; |
| 532 | break; |
| 533 | } |
| 534 | } |
| 535 | |
| 536 | if ($hasSubMinute) { |
| 537 | for ($tick = 1; $tick < 60; $tick++) { |
| 538 | sleep(1); |
| 539 | foreach ($this->evaluateTasksOnce($scheduledTasks, $application, true) as $jobId => $task) { |
| 540 | $tasks[$jobId] = $task; |
| 541 | } |
| 542 | } |
| 543 | } |
| 544 | |
| 545 | return $tasks; |
| 546 | } |
| 547 | |
| 548 | /** |
| 549 | * Clear jobs from queue |
| 550 | * |
| 551 | * @return Queue |
| 552 | */ |
| 553 | public function clear(): Queue |
| 554 | { |
| 555 | $this->adapter->clear(); |
| 556 | return $this; |
| 557 | } |
| 558 | |
| 559 | /** |
| 560 | * Clear dead-letter jobs from queue |
| 561 | * |
| 562 | * @return Queue |
| 563 | */ |
| 564 | public function clearFailed(): Queue |
| 565 | { |
| 566 | $this->adapter->clearDead(); |
| 567 | return $this; |
| 568 | } |
| 569 | |
| 570 | /** |
| 571 | * Clear tasks from queue |
| 572 | * |
| 573 | * @return Queue |
| 574 | */ |
| 575 | public function clearTasks(): Queue |
| 576 | { |
| 577 | if ($this->adapter instanceof TaskAdapterInterface) { |
| 578 | $this->adapter->clearTasks(); |
| 579 | } |
| 580 | return $this; |
| 581 | } |
| 582 | |
| 583 | } |