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Diffstat (limited to 'libtransport/src/core/global_configuration.h')
| -rw-r--r-- | libtransport/src/core/global_configuration.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/libtransport/src/core/global_configuration.h b/libtransport/src/core/global_configuration.h new file mode 100644 index 000000000..dcc8d94e3 --- /dev/null +++ b/libtransport/src/core/global_configuration.h @@ -0,0 +1,102 @@ +/* + * Copyright (c) 2021 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#pragma once + +#include <hicn/transport/interfaces/global_conf_interface.h> +#include <hicn/transport/utils/singleton.h> + +#include <functional> +#include <map> +#include <memory> +#include <mutex> +#include <system_error> + +namespace libconfig { +class Setting; +} + +namespace transport { +namespace core { + +/** + * Class holding workflow for global configuration. + * This class does not contains the actual configuration, which is rather stored + * inside the modules to be configured. This class contains the handlers to call + * for getting/setting the configurations and to parse the corresponding + * sections of the configuration file. Each class register 3 callbacks: one to + * parse conf section and 2 to set/get the configuration through programming + * interface. + */ +class GlobalConfiguration : public utils::Singleton<GlobalConfiguration> { + static const constexpr char *conf_file = "TRANSPORT_CONFIG"; + friend class utils::Singleton<GlobalConfiguration>; + + public: + /** + * This callback will be called by GlobalConfiguration in + * + */ + using ParserCallback = std::function<void(const libconfig::Setting &config, + std::error_code &ec)>; + using GetCallback = + std::function<void(interface::global_config::ConfigurationObject &object, + std::error_code &ec)>; + + using SetCallback = std::function<void( + const interface::global_config::ConfigurationObject &object, + std::error_code &ec)>; + + ~GlobalConfiguration() = default; + + public: + void parseConfiguration(const std::string &path); + + void registerConfigurationParser(const std::string &key, + const ParserCallback &parser); + + void registerConfigurationSetter(const std::string &key, + const SetCallback &set_callback); + void registerConfigurationGetter(const std::string &key, + const GetCallback &get_callback); + + void unregisterConfigurationParser(const std::string &key); + + void unregisterConfigurationSetter(const std::string &key); + + void unregisterConfigurationGetter(const std::string &key); + + void getConfiguration( + interface::global_config::ConfigurationObject &configuration_object, + std::error_code &ec); + void setConfiguration( + const interface::global_config::ConfigurationObject &configuration_object, + std::error_code &ec); + + private: + GlobalConfiguration(); + std::string conf_file_path_; + bool parseTransportConfig(const std::string &path); + + private: + std::mutex cp_mtx_; + using ParserPair = std::pair<bool, ParserCallback>; + std::map<std::string, ParserPair> configuration_parsers_; + std::map<std::string, GetCallback> configuration_getters_; + std::map<std::string, SetCallback> configuration_setters_; +}; + +} // namespace core +} // namespace transport
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