Add support for config file parsing and watching

[ric-plt/xapp-frame-cpp.git] / src / config / config.hpp

diff --git a/src/config/config.hpp b/src/config/config.hpp
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--- /dev/null
+++ b/src/config/config.hpp
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+// vi: ts=4 sw=4 noet:
+/*
+==================================================================================
+    Copyright (c) 2020 AT&T Intellectual Property.
+    Copyright (c) 2020 Nokia
+
+   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.
+==================================================================================
+*/
+
+/*
+    Mnemonic:  config.
+    Abstract:  Header for the config reader/watcher class.
+
+    Date:       27 July 2020
+    Author:     E. Scott Daniels
+*/
+
+#ifndef XAPP_CONFIG_HPP
+#define XAPP_CONFIG_HPP
+
+
+#include <iostream>
+#include <thread>
+
+#include "jhash.hpp"
+#include "config.hpp"
+#include "config_cb.hpp"
+
+namespace xapp {
+
+#define MAX_PFNAME     (4096 + 256)            // max path name and max filname + nil for buffer allocation
+
+class Config {
+       std::string     fname;                          // the file name that we'll listen to
+       std::thread* listener;                  // listener thread info
+
+       std::shared_ptr<Jhash>  jh;             // the currently parsed json from the config
+       std::unique_ptr<Config_cb> cb;  // info needed to drive user code when config change noticed
+       void*   user_cb_data;                   // data that the caller wants passed on notification callback
+
+       // -----------------------------------------------------------------------
+       private:
+               std::shared_ptr<xapp::Jhash>  jparse( std::string fname );
+               std::shared_ptr<xapp::Jhash>  jparse( );
+               void Listener( );
+
+       public:
+               Config();                                               // builders
+               Config( std::string fname);
+
+               bool Get_control_bool( std::string name, bool defval );
+               bool Get_control_bool( std::string name );
+
+               std::string Get_contents( );
+
+               std::string Get_control_str( std::string name, std::string defval );
+               std::string Get_control_str( std::string name );
+
+               double Get_control_value( std::string name, double defval );
+               double Get_control_value( std::string name );
+
+               std::string Get_port( std::string name );
+
+               void Set_callback( notify_callback usr_func, void* usr_data );
+};
+
+
+} // namespace
+
+
+
+#endif