event_channel_registry.hpp

/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * Copyright (C) 2025 Marco Craveiro <marco.craveiro@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 3 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */
#ifndef ORES_EVENTING_SERVICE_EVENT_CHANNEL_REGISTRY_HPP
#define ORES_EVENTING_SERVICE_EVENT_CHANNEL_REGISTRY_HPP
 
#include <mutex>
#include <vector>
#include <string>
#include <unordered_map>
#include "ores.eventing/domain/event_channel_info.hpp"
#include "ores.eventing/domain/event_traits.hpp"
 
namespace ores::eventing::service {
 
class event_channel_registry final {
public:
    event_channel_registry() = default;
    ~event_channel_registry() = default;
 
    event_channel_registry(const event_channel_registry&) = delete;
    event_channel_registry& operator=(const event_channel_registry&) = delete;
    event_channel_registry(event_channel_registry&&) = delete;
    event_channel_registry& operator=(event_channel_registry&&) = delete;
 
    template<domain::has_event_traits Event>
    void register_channel(const std::string& description) {
        using traits = domain::event_traits<Event>;
        register_channel(std::string{traits::name}, description);
    }
 
    void register_channel(const std::string& name, const std::string& description);
 
    [[nodiscard]] std::vector<domain::event_channel_info> get_channels() const;
 
    [[nodiscard]] bool is_registered(const std::string& name) const;
 
    [[nodiscard]] std::size_t size() const;
 
private:
    mutable std::mutex mutex_;
    std::unordered_map<std::string, domain::event_channel_info> channels_;
};
 
}
 
#endif