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<?php
namespace RectorPrefix202209\React\Dns\Query;
use RectorPrefix202209\React\Promise\CancellablePromiseInterface;
use RectorPrefix202209\React\Promise\Deferred;
use RectorPrefix202209\React\Promise\PromiseInterface;
final class RetryExecutor implements ExecutorInterface
{
private $executor;
private $retries;
public function __construct(ExecutorInterface $executor, $retries = 2)
{
$this->executor = $executor;
$this->retries = $retries;
}
public function query(Query $query)
{
return $this->tryQuery($query, $this->retries);
}
public function tryQuery(Query $query, $retries)
{
$deferred = new Deferred(function () use(&$promise) {
if ($promise instanceof CancellablePromiseInterface || !\interface_exists('RectorPrefix202209\\React\\Promise\\CancellablePromiseInterface') && \method_exists($promise, 'cancel')) {
$promise->cancel();
}
});
$success = function ($value) use($deferred, &$errorback) {
$errorback = null;
$deferred->resolve($value);
};
$executor = $this->executor;
$errorback = function ($e) use($deferred, &$promise, $query, $success, &$errorback, &$retries, $executor) {
if (!$e instanceof TimeoutException) {
$errorback = null;
$deferred->reject($e);
} elseif ($retries <= 0) {
$errorback = null;
$deferred->reject($e = new \RuntimeException('DNS query for ' . $query->describe() . ' failed: too many retries', 0, $e));
// avoid garbage references by replacing all closures in call stack.
// what a lovely piece of code!
$r = new \ReflectionProperty('Exception', 'trace');
$r->setAccessible(\true);
$trace = $r->getValue($e);
// Exception trace arguments are not available on some PHP 7.4 installs
// @codeCoverageIgnoreStart
foreach ($trace as &$one) {
if (isset($one['args'])) {
foreach ($one['args'] as &$arg) {
if ($arg instanceof \Closure) {
$arg = 'Object(' . \get_class($arg) . ')';
}
}
}
}
// @codeCoverageIgnoreEnd
$r->setValue($e, $trace);
} else {
--$retries;
$promise = $executor->query($query)->then($success, $errorback);
}
};
$promise = $this->executor->query($query)->then($success, $errorback);
return $deferred->promise();
}
}
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