void ConfigurationManager::update()

in prod/native/libcommon/code/ConfigurationManager.cpp [94:141]
43 lines of code
9 McCabe index (conditional complexity)

void ConfigurationManager::update() {
    ConfigurationSnapshot newConfig;
    newConfig.revision = getNextRevision();

    for (auto const &entry : options_) {
        auto optionVal = fetchStringValue(entry.first);
        if (!optionVal.has_value()) {
            continue; // keep default from snapshot
        }
        auto &optionValue = optionVal.value();

        try {
            switch (entry.second.type) {
                case OptionMetadata::type::string: {
                    std::string *value = (std::string *)((std::byte *)&newConfig + entry.second.offset);
                    value->swap(optionValue);
                    break;
                }
                case OptionMetadata::type::boolean: {
                    bool *value = (bool *)((std::byte *)&newConfig + entry.second.offset);
                    *value = utils::parseBoolean(optionValue);
                    break;
                }
                case OptionMetadata::type::duration: {
                    auto value = reinterpret_cast<std::chrono::milliseconds *>((std::byte *)&newConfig + entry.second.offset);
                    *value = utils::convertDurationWithUnit(optionValue);
                    break;
                }
                case OptionMetadata::type::loglevel: {
                    LogLevel *value = (LogLevel *)((std::byte *)&newConfig + entry.second.offset);
                    *value = utils::parseLogLevel(optionValue);
                    break;
                }
                case OptionMetadata::type::bytes: {
                    std::size_t *value = (std::size_t *)((std::byte *)&newConfig + entry.second.offset);
                    *value = utils::parseByteUnits(optionValue);
                    break;
                }
            }

        } catch (std::invalid_argument const &e) {
            ELOGF_NF_ERROR(logger_, "ConfigurationManager::update exception: '%s'", e.what());
        }
    }

    //TODO lock
    current_ = std::move(newConfig);
}