pluginmgr.hpp

/**
 * \file pluginmgr.hpp
 * \brief Plugin manager factory
 * \author Jiri Havranek <havranek@cesnet.cz>
 * \date 2021
 */
/*
 * Copyright (C) 2021 CESNET
 *
 * LICENSE TERMS
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name of the Company nor the names of its contributors
 *    may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 *
 *
 */

#ifndef IPXP_PLUGIN_MANAGER_HPP
#define IPXP_PLUGIN_MANAGER_HPP

#include <exception>
#include <functional>
#include <map>
#include <string>
#include <vector>

#include <ipfixprobe/plugin.hpp>

namespace ipxp {

class PluginManagerError : public std::runtime_error {
public:
    explicit PluginManagerError(const std::string& msg)
        : std::runtime_error(msg)
    {
    }
    explicit PluginManagerError(const char* msg)
        : std::runtime_error(msg)
    {
    }
};

// TODO: should be singleton
class PluginManager {
public:
    PluginManager();
    ~PluginManager();
    void register_plugin(const std::string& name, PluginGetter g);
    Plugin* get(const std::string& name);
    std::vector<Plugin*> get() const;
    Plugin* load(const std::string& name);

private:
    struct LoadedPlugin {
        void* m_handle;
        std::string m_file;
    };

    std::map<std::string, PluginGetter> m_getters;
    std::vector<LoadedPlugin> m_loaded_so;
    PluginRecord* m_last_rec;

    void unload();
    void register_loaded_plugins();
};

} // namespace ipxp
#endif /* IPXP_PLUGIN_MANAGER_HPP */