RestClient::isServerAlive

static function isServerAlive()
{
	$last = static::getLastUnSuccessCallInfo();

	if(empty($last))
		return true;

	if(time() - intval($last['TIMESTAMP']) >= self::UNSUCCESSFUL_CALL_WAIT_INTERVAL)
		return true;

	if(intval($last['COUNT']) <= self::UNSUCCESSFUL_CALL_TRYINGS)
		return true;

	return false;
}