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<?php |
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namespace Tleckie\Async; |
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/** |
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* Class Async |
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* |
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* @package Tleckie\Async |
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* @author Teodoro Leckie Westberg <[email protected]> |
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*/ |
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class Async |
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{ |
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/** @var TaskInterface[] */ |
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protected array $pendingQueue = []; |
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/** @var TaskInterface[] */ |
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protected array $progressQueue = []; |
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/** @var TaskInterface[] */ |
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protected array $finishedQueue = []; |
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/** @var TaskInterface[] */ |
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protected array $failedQueue = []; |
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/** @var TaskFactoryInterface */ |
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protected TaskFactoryInterface $taskFactory; |
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/** @var Encoder */ |
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protected Encoder $encoder; |
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/** @var mixed[] */ |
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protected array $results = []; |
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/** @var int */ |
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protected int $sleep; |
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/** |
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* Async constructor. |
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* |
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* @param TaskFactoryInterface|null $taskFactory |
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* @param Encoder|null $encoder |
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* @param int|null $sleep |
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*/ |
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public function __construct( |
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?TaskFactoryInterface $taskFactory = null, |
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?Encoder $encoder = null, |
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?int $sleep = 5000 |
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) { |
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$this->taskFactory = $taskFactory ?? new TaskFactory(); |
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$this->encoder = $encoder ?? new Encoder(); |
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$this->sleep = $sleep; |
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$this->listener(); |
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} |
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protected function listener(): void |
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{ |
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pcntl_async_signals(true); |
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pcntl_signal(SIGCHLD, function ($signo, $status) { |
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while (true) { |
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$pid = pcntl_waitpid(-1, $processState, WNOHANG | WUNTRACED); |
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if ($pid <= 0) { |
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break; |
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} |
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$process = $this->progressQueue[$pid] ?? null; |
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if (!$process || 0 === $status['status']) { |
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$this->finished($process); |
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continue; |
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} |
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$this->failed($process); |
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} |
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}); |
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} |
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/** |
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* @param TaskInterface $task |
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* @return TaskInterface |
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*/ |
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protected function finished(TaskInterface $task): TaskInterface |
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{ |
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unset($this->progressQueue[$task->pid()]); |
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$this->notify(); |
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$this->results[] = $task->handle()->output(); |
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$this->finishedQueue[$task->pid()] = $task; |
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return $task; |
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} |
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protected function notify(): void |
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{ |
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$process = array_shift($this->pendingQueue); |
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if (!$process) { |
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return; |
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} |
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$this->progress($process); |
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} |
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/** |
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* @param TaskInterface $task |
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* @return TaskInterface |
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*/ |
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protected function progress(TaskInterface $task): TaskInterface |
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{ |
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$task->start(); |
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unset($this->pendingQueue[$task->id()]); |
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$this->progressQueue[$task->pid()] = $task; |
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return $task; |
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} |
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/** |
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* @param TaskInterface $task |
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* @return TaskInterface |
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*/ |
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protected function failed(TaskInterface $task): TaskInterface |
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{ |
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unset($this->progressQueue[$task->pid()]); |
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$this->notify(); |
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$this->failedQueue[$task->pid()] = $task->error(); |
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return $task; |
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} |
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/** |
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* @param callable $process |
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* @return TaskInterface |
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*/ |
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public function add(callable $process): TaskInterface |
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{ |
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$task = $this->taskFactory->createTask($process, $this->encoder); |
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return $this->pending($task); |
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} |
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/** |
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* @param TaskInterface $task |
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* @return TaskInterface |
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*/ |
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protected function pending(TaskInterface $task): TaskInterface |
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{ |
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$this->pendingQueue[$task->id()] = $task; |
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$this->notify(); |
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return $task; |
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} |
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/** |
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* @return array |
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*/ |
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public function wait(): array |
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{ |
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while (true) { |
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if (!count($this->progressQueue)) { |
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break; |
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} |
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usleep($this->sleep); |
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} |
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return $this->results; |
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} |
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} |
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teodoroleckie /
async
