DragonBe\Vies\Vies::getHeartBeat PHP Method

    public function getHeartBeat()
    {
        if (null === $this->heartBeat) {
            $this->setHeartBeat(new HeartBeat('tcp://' . self::VIES_DOMAIN, 80));
        }
        return $this->heartBeat;
    }

 /**
  * @return JsonModel
  */
 public function checkVatAction()
 {
     $financialId = (int) $this->getEvent()->getRequest()->getPost()->get('financialId');
     /**
      * @var $financial Financial
      */
     $financial = $this->getOrganisationService()->findEntityById('financial', $financialId);
     if (is_null($financial->getVat()) && is_null($this->getEvent()->getRequest()->getPost()->get('vat'))) {
         return new JsonModel(['success' => 'error', 'result' => $this->translate("txt-vat-number-empty")]);
     }
     //Overrule the vat when a VAT number is sent via the URL
     if (!is_null($this->getEvent()->getRequest()->getPost()->get('vat'))) {
         $vat = $this->getEvent()->getRequest()->getPost()->get('vat');
     } else {
         $vat = $financial->getVat();
     }
     $vies = new Vies();
     if (false === $vies->getHeartBeat()->isAlive()) {
         return new JsonModel(['success' => 'error', 'result' => 'Service is not available at the moment, please try again later.']);
     } else {
         try {
             $result = $vies->validateVat($financial->getOrganisation()->getCountry()->getCd(), trim(str_replace($financial->getOrganisation()->getCountry()->getCd(), '', $vat)));
             if ($result->isValid()) {
                 //Update the financial
                 $financial->setVatStatus(Financial::VAT_STATUS_VALID);
                 $financial->setDateVat(new \DateTime());
                 $this->getOrganisationService()->updateEntity($financial);
                 return new JsonModel(['success' => 'success', 'result' => 'Valid', 'status' => Financial::VAT_STATUS_VALID]);
             } else {
                 //Update the financial
                 $financial->setVatStatus(Financial::VAT_STATUS_INVALID);
                 $financial->setDateVat(new \DateTime());
                 $this->getOrganisationService()->updateEntity($financial);
                 return new JsonModel(['success' => 'error', 'result' => 'Invalid', 'status' => Financial::VAT_STATUS_INVALID]);
             }
         } catch (\Exception $e) {
             return new JsonModel(['success' => 'error', 'result' => $e->getMessage(), 'status' => Financial::VAT_STATUS_UNDEFINED]);
         }
     }
 }