How to load and activate modem config file

Please follow below steps to load and activate a modem config file

1. Get the ConfigFactory and ModemConfigManager instances

auto &configFactory = telux::config::ConfigFactory::getInstance();
auto modemConfigManager = configFactory.getModemConfigManager();

### 2. Wait for the Modem Config sub system initialization

bool subSystemStatus = modemConfigManager->isSubsystemReady();
if (!subSystemStatus) {
    std::cout << "Modem Config subsystem is not ready, Please wait" << std::endl;
    std::future<bool> f = modemConfigManager_->onSubsystemReady();
    // Wait unconditionally for modem config subsystem to be ready
    subSystemStatus = f.get();
}
// Exit the application, if SDK is unable to initialize modem config subsystems
if (!subSystemStatus) {
    std::cout << "ERROR - Unable to initialize subSystem" << std::endl;
    return EXIT_FAILURE;
}

### 3. Load a modem config file from file path

std::promise<bool> p;
auto status = modemConfigManager_->loadConfigFile(filePath, configType_,
         [&p](telux::common::ErrorCode error) {
        if (error == telux::common::ErrorCode::SUCCESS) {
            p.set_value(true);
        } else {
            std::cout << "Failed to load config" << std::endl;
            p.set_value(false);
        }
    });
if(status == telux::common::Status::SUCCESS) {
    std::cout << "Load config Request sent" << std::endl;
} else {
    std::cout << "Load config Request failed" << std::endl;
}

if (p.get_future().get()) {
         std::cout << "Load config succeeded." << std::endl;
}

### 4. Request Config List from modem's storage.

// configList_ is member variable to store config list.
std::promise<bool> p;
telux::common::Status status = modemConfigManager_->requestConfigList(
    [&p, this](std::vector<telux::config::ConfigInfo> configList,
                                    telux::common::ErrorCode errCode) {
    if (errCode == telux::common::ErrorCode::SUCCESS) {
        configList_ = configList;
        p.set_value(true);
    } else {
        std::cout << "Failed to get config list" << std::endl;
        p.set_value(false);
    }
});
if (status == telux::common::Status::SUCCESS) {
    std::cout << "Get Config List Request sent" << std::endl;
} else {
    std::cout << "Get Config List Request failed" << std::endl;
}

if (p.get_future().get()) {
    std::cout << "Config List Updated !!" << std::endl;
}

5. Activate modem config File.

// configNo denotes index of the modem config file in in config List.
ConfigId configId;
configId = configList_[configNo].id;
telux::common::Status status = modemConfigManager_->activateConfig(configType_, configId,
        slotId_, [&p](telux::common::ErrorCode error) {
        if (error == telux::common::ErrorCode::SUCCESS) {
            p.set_value(true);
        } else {
            std::cout << "Failed to activate config" << std::endl;
            p.set_value(false);
        }
    });
if (status == telux::common::Status::SUCCESS) {
    std::cout << "Activate Request sent " << std::endl;
} else {
    std::cout << "Activate Request failed" << std::endl;
}

if (p.get_future().get()) {
         std::cout << "config Activated !!" << std::endl;
}