Get dedicated radio bearer status and indication

This sample application demonstrates how to get dedicated radio bearer status and indication.

1. Implement IServingSystemListener listener class

class ServingSystemListener : public telux::data::IServingSystemListener {
 public:
   ServingSystemListener(SlotId slotId) : slotId_(slotId) {}
   void onDrbStatusChanged(telux::data::DrbStatus status) override {
     std::cout << "\n onDrbStatusChanged on SlotId: "
                 << static_cast<int>(slotId_) << std::endl;
     switch(status) {
         case telux::data::DrbStatus::ACTIVE:
             std::cout << "Current Drb Status is Active" << std::endl;
             break;
         case telux::data::DrbStatus::DORMANT:
             std::cout << "Current Drb Status is Dormant" << std::endl;
             break;
         case telux::data::DrbStatus::UNKNOWN:
             std::cout << "Current Drb Status is Unknown" << std::endl;
             break;
         default:
             std::cout << "Error: Unexpected Drb Status is reported" << std::endl;
             break;
     }
   }

 private:
   SlotId slotId_;
};

2. Optioanlly, instantiate initialization callback

auto initCb = [&](telux::common::ServiceStatus status) {
     subSystemStatus = status;
     subSystemStatusUpdated = true;
     cv_.notify_all();
};

3. Get the DataFactory and data serving system manager instance and check if the data serving system manager is ready or not

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);

4. Register for serving system listener

dataServingSystemMgr->registerListener(dataListener);

5. Get dedicated radio bearer Status

telux::data::DrbStatus drbStatus = dataServingSystemMgr->getDrbStatus();

switch(drbStatus) {
     case telux::data::DrbStatus::ACTIVE:
     std::cout << "Current Drb Status is Active" << std::endl;
     break;
     case telux::data::DrbStatus::DORMANT:
     std::cout << "Current Drb Status is Dormant" << std::endl;
     break;
     case telux::data::DrbStatus::UNKNOWN:
     std::cout << "Current Drb Status is Unknown" << std::endl;
     break;
     default:
     std::cout << "Error: Unexpected Drb Status is reported" << std::endl;
     break;
}

Now, wait for dedicated radio bearer notifications.