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<?php |
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/** |
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* This file is part of the tarantool/client package. |
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* |
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* (c) Eugene Leonovich <[email protected]> |
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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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declare(strict_types=1); |
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namespace Tarantool\Client\Middleware; |
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use Tarantool\Client\Exception\ClientException; |
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use Tarantool\Client\Exception\CommunicationFailed; |
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use Tarantool\Client\Exception\ConnectionFailed; |
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use Tarantool\Client\Exception\UnexpectedResponse; |
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use Tarantool\Client\Handler\Handler; |
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use Tarantool\Client\Request\Request; |
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use Tarantool\Client\Response; |
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final class RetryMiddleware implements Middleware |
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{ |
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private const DEFAULT_MAX_RETRIES = 2; |
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private const MAX_RETRIES_LIMIT = 10; |
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private const MAX_DELAY_MS = 60000; |
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/** @var \Closure */ |
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private $getDelayMs; |
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/** |
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* @param \Closure $getDelayMs |
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*/ |
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private function __construct($getDelayMs) |
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{ |
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$this->getDelayMs = $getDelayMs; |
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} |
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public static function constant(int $maxRetries = self::DEFAULT_MAX_RETRIES, int $intervalMs = 100) : self |
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{ |
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return new self(static function (int $retries) use ($maxRetries, $intervalMs) { |
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return $retries > $maxRetries ? null : $intervalMs; |
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}); |
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} |
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public static function exponential(int $maxRetries = self::DEFAULT_MAX_RETRIES, int $baseMs = 10) : self |
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{ |
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return new self(static function (int $retries) use ($maxRetries, $baseMs) { |
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return $retries > $maxRetries ? null : $baseMs ** $retries; |
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}); |
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} |
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public static function linear(int $maxRetries = self::DEFAULT_MAX_RETRIES, int $differenceMs = 100) : self |
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{ |
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return new self(static function (int $retries) use ($maxRetries, $differenceMs) { |
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return $retries > $maxRetries ? null : $differenceMs * $retries; |
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}); |
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} |
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public static function custom(\Closure $getDelayMs) : self |
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{ |
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return new self(static function (int $retries, \Throwable $e) use ($getDelayMs) : ?int { |
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return $getDelayMs($retries, $e); |
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}); |
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} |
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public function process(Request $request, Handler $handler) : Response |
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{ |
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$retries = 0; |
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do { |
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try { |
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return $handler->handle($request); |
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} catch (UnexpectedResponse $e) { |
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$handler->getConnection()->close(); |
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break; |
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} catch (ConnectionFailed | CommunicationFailed $e) { |
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$handler->getConnection()->close(); |
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goto retry; |
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} catch (ClientException $e) { |
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retry: |
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if (self::MAX_RETRIES_LIMIT === $retries) { |
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break; |
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} |
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if (null === $delayMs = ($this->getDelayMs)(++$retries, $e)) { |
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break; |
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} |
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$delayMs = \min($delayMs, self::MAX_DELAY_MS) / 2; |
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$delayMs += \mt_rand(0, $delayMs); |
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\usleep($delayMs * 1000); |
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} |
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} while (true); |
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throw $e; |
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} |
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} |
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tarantool-php /
client
