Using Request Service Domain Preference API

Please follow below steps to request service domain preference

1. Get phone factory and serving system manager instances

auto &phoneFactory = telux::tel::PhoneFactory::getInstance();
auto servingSystemMgr
   = phoneFactory.getServingSystemManager(DEFAULT_SLOT_ID);

2. Wait for the serving subsystem initialization

bool subSystemStatus = servingSystemMgr->isSubsystemReady();

2.1 If serving subsystem is not ready, wait for it to be ready

if(!subSystemsStatus) {
   std::cout << "Serving subsystem is not ready" << std::endl;
   std::cout << "wait unconditionally for it to be ready " << std::endl;
   std::future<bool> f = servingSystemMgr->onSubsystemReady();
   subSystemsStatus = f.get();
}

3. Exit the application, if SDK is unable to initialize serving subsystem

if(subSystemsStatus) {
   std::cout << " *** Serving subsystem ready *** " << std::endl;
} else {
   std::cout << " *** ERROR - Unable to initialize serving subsystem"
             << std::endl;
   return 1;
}

6. Implement response callback to receive response for request service domain preference

class ServiceDomainResponseCallback {
public:
   void serviceDomainResponse(telux::tel::ServiceDomainPreference preference,
                              telux::common::ErrorCode errorCode) {
      if(errorCode == telux::common::ErrorCode::SUCCESS) {
         std::cout << "Service domain preference: "
                   << static_cast<int>(preference)
                   << std::endl;
      } else {
         std::cout << "\n setServiceDomainPreference failed, ErrorCode: "
                   << static_cast<int>(errorCode)
                   << std::endl;
      }
   }
};

7. Send request service domain preference request along with required function object

if(servingSystemMgr) {
   servingSystemMgr->requestServiceDomainPreference(
      ServiceDomainResponseCallback::serviceDomainResponse);
   std::cout << static_cast<int>(status) <<std::endl;
}

8. Receive callback for request service domain preference request in serviceDomainResponse function