/**
* Calls the given generator periodically and publishes the return value.
*
* @param int $interval
* @param Message $message
* @param callable $generator
*
* @return ExtendedPromiseInterface
*/
public function publishPeriodically($interval, Message $message, callable $generator)
{
if (!$this->isConnected) {
return new RejectedPromise(new \LogicException('The client is not connected.'));
}
$deferred = new Deferred();
$this->timer[] = $this->loop->addPeriodicTimer($interval, function () use($message, $generator, $deferred) {
$this->publish($message->withPayload($generator($message->getTopic())))->then(function ($value) use($deferred) {
$deferred->notify($value);
}, function (\Exception $e) use($deferred) {
$deferred->reject($e);
});
});
return $deferred->promise();
}
