EFS backup and restore

This sample app demonstrates how to use APIs to request EFS backup and listen to EFS restore and backup indications.

1. Get platform factory instance

auto &platformFactory = telux::platform::PlatformFactory::getInstance();

2. Prepare a callback that is invoked when the filesystem sub-system initialization is complete

std::promise<telux::common::ServiceStatus> p;
auto initCb = [&p](telux::common::ServiceStatus status) {
   std::cout << "Received service status: " << static_cast<int>(status) << std::endl;
   p.set_value(status);
};

3. Get the filesystem manager

std::shared_ptr<telux::platform::IFsManager> fsManager = platformFactory.getFsManager(initCb);
if (fsManager == nullptr) {
   std::cout << "filesystem manager is nullptr" << std::endl;
   exit(1);
}
std::cout << "Obtained filesystem manager" << std::endl;

4. Wait until initialization is complete

p.get_future().get();
if (fsManager->getServiceStatus() != telux::common::ServiceStatus::SERVICE_AVAILABLE) {
   std::cout << "Filesystem service not available" << std::endl;
   exit(1);
}
std::cout << "Filesystem service is now available" << std::endl;

5. Create the listener object and register as a listener

std::shared_ptr<EfsEventListener> efsEventListener = std::make_shared<EfsEventListener>();
fsManager->registerListener(efsEventListener);

6. Receive service status notifications

virtual void onServiceStatusChange(telux::common::ServiceStatus serviceStatus) override {
   PRINT_NOTIFICATION << "Filesystem service status: ";
   std::string status;
   switch (serviceStatus) {
      case telux::common::ServiceStatus::SERVICE_AVAILABLE: {
            status = "Available";
            break;
      }
      case telux::common::ServiceStatus::SERVICE_UNAVAILABLE: {
            status = "Unavailable";
            break;
      }
      case telux::common::ServiceStatus::SERVICE_FAILED: {
            status = "Failed";
            break;
      }
      default: {
            status = "Unknown";
            break;
      }
   }
   std::cout << status << std::endl;
}

7. Start EFS backup whenever necessary

telux::common::Status status = fsManager->startEfsBackup();
if(status != telux::common::Status::SUCCESS) {
   std::cout << "Unable to start EFS backup: ";
   Utils::printStatus(status);
}

8. Receive EFS restore and backup notifications

virtual void OnEfsRestoreEvent(telux::platform::EfsEventInfo event) override {
   PRINT_NOTIFICATION
      << ": Received efs event: Restore"
      << ((event.event == telux::platform::EfsEvent::START) ? " started" : "ended");
   if (event.event == telux::platform::EfsEvent::END) {
      std::cout << " with result: " << Utils::getErrorCodeAsString(event.error) << std::endl;
   }
}

virtual void OnEfsBackupEvent(telux::platform::EfsEventInfo event) override {
   PRINT_NOTIFICATION
      << ": Received efs event: Backup"
      << ((event.event == telux::platform::EfsEvent::START) ? " started" : "ended");
   if (event.event == telux::platform::EfsEvent::END) {
      std::cout << " with result: " << Utils::getErrorCodeAsString(event.error) << std::endl;
   }
}

9. Clean-up when we do not need to listen anything

fsManager->deregisterListener(efsEventListener);
efsEventListener = nullptr;
fsManager = nullptr;