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<?php |
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namespace Thruster\Component\Dns; |
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use Thruster\Component\Dns\Exception\TimeoutException; |
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use Thruster\Component\Promise\Deferred; |
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use Thruster\Component\Promise\PromiseInterface; |
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/** |
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* Class RetryExecutor |
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* |
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* @package Thruster\Component\Dns |
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* @author Aurimas Niekis <[email protected]> |
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*/ |
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class RetryExecutor implements ExecutorInterface |
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{ |
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/** |
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* @var ExecutorInterface |
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*/ |
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private $executor; |
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/** |
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* @var int |
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*/ |
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private $retries; |
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public function __construct(ExecutorInterface $executor, int $retries = 2) |
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{ |
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$this->executor = $executor; |
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$this->retries = $retries; |
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} |
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public function query(string $nameServer, Query $query) : PromiseInterface |
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{ |
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$deferred = new Deferred(); |
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$this->tryQuery($nameServer, $query, $this->retries, $deferred); |
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return $deferred->promise(); |
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} |
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public function tryQuery(string $nameServer, Query $query, int $retries, Deferred $deferred) |
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{ |
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$errorCallback = function ($error) use ($nameServer, $query, $retries, $deferred) { |
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if (false === ($error instanceof TimeoutException)) { |
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$deferred->reject($error); |
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return; |
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} |
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if (0 >= $retries) { |
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$error = new \RuntimeException( |
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sprintf("DNS query for %s failed: too many retries", $query->getName()), |
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0, |
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$error |
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); |
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$deferred->reject($error); |
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return; |
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} |
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$this->tryQuery($nameServer, $query, $retries - 1, $deferred); |
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}; |
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$this->executor |
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->query($nameServer, $query) |
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->then([$deferred, 'resolve'], $errorCallback); |
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} |
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} |
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ThrusterIO /
dns
