92 lines
3.1 KiB
PHP
92 lines
3.1 KiB
PHP
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Messenger\Retry;
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use Symfony\Component\Messenger\Envelope;
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use Symfony\Component\Messenger\Exception\InvalidArgumentException;
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use Symfony\Component\Messenger\Stamp\RedeliveryStamp;
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/**
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* A retry strategy with a constant or exponential retry delay.
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*
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* For example, if $delayMilliseconds=10000 & $multiplier=1 (default),
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* each retry will wait exactly 10 seconds.
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*
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* But if $delayMilliseconds=10000 & $multiplier=2:
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* * Retry 1: 10 second delay
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* * Retry 2: 20 second delay (10000 * 2 = 20000)
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* * Retry 3: 40 second delay (20000 * 2 = 40000)
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*
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* @author Ryan Weaver <ryan@symfonycasts.com>
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*
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* @final
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*/
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class MultiplierRetryStrategy implements RetryStrategyInterface
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{
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private $maxRetries;
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private $delayMilliseconds;
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private $multiplier;
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private $maxDelayMilliseconds;
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/**
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* @param int $maxRetries The maximum number of times to retry
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* @param int $delayMilliseconds Amount of time to delay (or the initial value when multiplier is used)
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* @param float $multiplier Multiplier to apply to the delay each time a retry occurs
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* @param int $maxDelayMilliseconds Maximum delay to allow (0 means no maximum)
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*/
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public function __construct(int $maxRetries = 3, int $delayMilliseconds = 1000, float $multiplier = 1, int $maxDelayMilliseconds = 0)
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{
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$this->maxRetries = $maxRetries;
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if ($delayMilliseconds < 0) {
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throw new InvalidArgumentException(sprintf('Delay must be greater than or equal to zero: "%s" given.', $delayMilliseconds));
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}
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$this->delayMilliseconds = $delayMilliseconds;
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if ($multiplier < 1) {
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throw new InvalidArgumentException(sprintf('Multiplier must be greater than zero: "%s" given.', $multiplier));
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}
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$this->multiplier = $multiplier;
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if ($maxDelayMilliseconds < 0) {
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throw new InvalidArgumentException(sprintf('Max delay must be greater than or equal to zero: "%s" given.', $maxDelayMilliseconds));
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}
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$this->maxDelayMilliseconds = $maxDelayMilliseconds;
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}
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/**
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* @param \Throwable|null $throwable The cause of the failed handling
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*/
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public function isRetryable(Envelope $message, \Throwable $throwable = null): bool
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{
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$retries = RedeliveryStamp::getRetryCountFromEnvelope($message);
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return $retries < $this->maxRetries;
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}
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/**
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* @param \Throwable|null $throwable The cause of the failed handling
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*/
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public function getWaitingTime(Envelope $message, \Throwable $throwable = null): int
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{
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$retries = RedeliveryStamp::getRetryCountFromEnvelope($message);
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$delay = $this->delayMilliseconds * $this->multiplier ** $retries;
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if ($delay > $this->maxDelayMilliseconds && 0 !== $this->maxDelayMilliseconds) {
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return $this->maxDelayMilliseconds;
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}
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return (int) ceil($delay);
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}
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}
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