# Get roaming status and indication

This sample application demonstrates how to get roaming status and indications.

1. Implement IServingSystemListener listener class

class ServingSystemListener : public telux::data::IServingSystemListener {
     public:
       ServingSystemListener(SlotId slotId) : slotId_(slotId) {}
       void onRoamingStatusChanged(telux::data::RoamingStatus status) {
         std::cout << "\n onRoamingStatusChanged on SlotId: "
                     << static_cast<int>(slotId_) << std::endl;
         bool isRoaming = status.isRoaming;
         if(isRoaming) {
             std::cout << "System is in Roaming State" << std::endl;
         } else {
             std::cout << "System is not in Roaming State" << std::endl;
         }
       }
     private:
       SlotId slotId_;
    };
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2. Optionally, instantiate an initialization callback

auto initCb = [&](telux::common::ServiceStatus status) {
         subSystemStatus = status;
         subSystemStatusUpdated = true;
         cv_.notify_all();
    };
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3. Get the data factory and data serving system manager instance and if data serving system manager is ready

auto &dataFactory = telux::data::DataFactory::getInstance();
    do {
        subSystemStatusUpdated = false;
        std::unique_lock<std::mutex> lck(mtx_);
        dataServingSystemMgr = dataFactory.getServingSystemManager(slotId, initCb);
        if (dataServingSystemMgr) {
             std::cout << "\n\nInitializing Data Serving System manager subsystem on slot " <<
                 slotId << ", Please wait ..." << std::endl;
             cv_.wait(lck, [&]{return subSystemStatusUpdated;});
             subSystemStatus = dataServingSystemMgr->getServiceStatus();
        }
    
        if (subSystemStatus == telux::common::ServiceStatus::SERVICE_AVAILABLE) {
             std::cout << " *** DATA Serving System is Ready *** " << std::endl;
             break;
        }
        else {
             std::cout << " *** Unable to initialize data Serving System *** " << std::endl;
        }
    } while (1);
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4. Register for serving system listener

dataServingSystemMgr->registerListener(dataListener);
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6. Get current service status

// Callback
    auto respCb = [&slotId](
          telux::data::RoamingStatus roamingStatus, telux::common::ErrorCode error) {
          std::cout << std::endl << std::endl;
          std::cout << "CALLBACK: "
                    << "requestRoamingStatus Response on slotid " << static_cast<int>(slotId);
          if(error == telux::common::ErrorCode::SUCCESS) {
             std::cout << " is successful" << std::endl;
             logRoamingStatusDetails(roamingStatus);
          }
          else {
             std::cout << " failed"
                       << ". ErrorCode: " << static_cast<int>(error) << std::endl;
          }
    };
    
    dataServingSystemMgr->requestRoamingStatus(respCb);
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Now, wait for request response and notifications.

Last Published: Aug 05, 2026

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