68 lines
1.9 KiB
PHP
68 lines
1.9 KiB
PHP
<?php
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namespace Toalett\Multiprocessing;
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use Evenement\EventEmitterInterface;
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use Evenement\EventEmitterTrait;
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use React\EventLoop\LoopInterface;
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class Context implements EventEmitterInterface
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{
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public const GC_INTERVAL = 120;
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public const CLEANUP_INTERVAL = 5;
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use EventEmitterTrait;
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private LoopInterface $eventLoop;
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private ConcurrencyLimit $limit;
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private Workers $workers;
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public function __construct(LoopInterface $eventLoop, ConcurrencyLimit $limit, ?Workers $workers = null)
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{
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$this->eventLoop = $eventLoop;
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$this->limit = $limit;
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$this->workers = $workers ?? new Workers();
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$this->eventLoop->futureTick(fn() => $this->emit('booted'));
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$this->eventLoop->futureTick(fn() => gc_enable());
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$this->eventLoop->addPeriodicTimer(self::CLEANUP_INTERVAL, fn() => $this->workers->cleanup());
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$this->eventLoop->addPeriodicTimer(self::GC_INTERVAL, fn() => gc_collect_cycles());
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$this->workers->on('worker_started', fn(int $pid) => $this->emit('worker_started', [$pid]));
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$this->workers->on('worker_stopped', fn(int $pid) => $this->emit('worker_stopped', [$pid]));
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$this->workers->on('worker_stopped', fn() => $this->emitIf($this->workers->empty(), 'no_workers_remaining'));
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}
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public function submit(callable $task, ...$args): void
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{
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$this->eventLoop->futureTick(function () use ($task, $args) {
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if ($this->limit->isReachedBy(count($this->workers))) {
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$this->emit('congestion');
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$this->workers->awaitCongestionRelief();
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$this->emit('congestion_relieved');
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}
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$this->workers->createWorkerFor($task, $args);
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});
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}
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public function run(): void
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{
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$this->eventLoop->run();
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}
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public function stop(): void
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{
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$this->eventLoop->futureTick(function() {
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$this->eventLoop->stop();
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$this->workers->stop();
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$this->emit('stopped');
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});
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}
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public function emitIf(bool $condition, string $event, ...$args): void
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{
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if ($condition) {
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$this->emit($event, $args);
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}
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}
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}
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