65 lines
1.8 KiB
PHP
65 lines
1.8 KiB
PHP
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<?php
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declare(strict_types=1);
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namespace OpenTelemetry\SDK\Metrics\StalenessHandler;
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use ArrayAccess;
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use Closure;
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use OpenTelemetry\SDK\Common\Time\ClockInterface;
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use OpenTelemetry\SDK\Common\Util\WeakMap;
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use OpenTelemetry\SDK\Metrics\StalenessHandlerFactoryInterface;
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use OpenTelemetry\SDK\Metrics\StalenessHandlerInterface;
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use Traversable;
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final class DelayedStalenessHandlerFactory implements StalenessHandlerFactoryInterface
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{
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private ClockInterface $clock;
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private int $nanoDelay;
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private Closure $stale;
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private Closure $freshen;
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/** @var ArrayAccess<DelayedStalenessHandler, int>&Traversable<DelayedStalenessHandler, int> */
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private $staleHandlers;
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/**
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* @param float $delay delay in seconds
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*/
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public function __construct(ClockInterface $clock, float $delay)
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{
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$this->clock = $clock;
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$this->nanoDelay = (int) ($delay * 1e9);
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$this->stale = function (DelayedStalenessHandler $handler): void {
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$this->staleHandlers[$handler] = $this->clock->now();
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};
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$this->freshen = function (DelayedStalenessHandler $handler): void {
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unset($this->staleHandlers[$handler]);
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};
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$this->staleHandlers = WeakMap::create();
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}
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public function create(): StalenessHandlerInterface
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{
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$this->triggerStaleHandlers();
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return new DelayedStalenessHandler($this->stale, $this->freshen);
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}
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private function triggerStaleHandlers(): void
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{
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$expired = $this->clock->now() - $this->nanoDelay;
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foreach ($this->staleHandlers as $handler => $timestamp) {
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if ($timestamp > $expired) {
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break;
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}
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/** @var DelayedStalenessHandler $handler */
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unset($this->staleHandlers[$handler]);
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$handler->triggerStale();
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}
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}
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}
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