beedb/include/network/server.h

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2022-04-04 20:25:01 +02:00
/*------------------------------------------------------------------------------*
* Architecture & Implementation of DBMS *
*------------------------------------------------------------------------------*
* Copyright 2022 Databases and Information Systems Group TU Dortmund *
* Visit us at *
* http://dbis.cs.tu-dortmund.de/cms/en/home/ *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR *
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, *
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR *
* OTHER DEALINGS IN THE SOFTWARE. *
* *
* Authors: *
* Maximilian Berens <maximilian.berens@tu-dortmund.de> *
* Roland Kühn <roland.kuehn@cs.tu-dortmund.de> *
* Jan Mühlig <jan.muehlig@tu-dortmund.de> *
*------------------------------------------------------------------------------*
*/
#pragma once
#include <array>
#include <config.h>
#include <cstddef>
#include <cstdint>
#include <optional>
#include <string>
namespace beedb::network
{
class Server;
class ClientHandler
{
public:
ClientHandler() noexcept = default;
virtual ~ClientHandler() noexcept = default;
virtual std::optional<std::string> handle_message(const std::uint32_t client_id, const std::string &message) = 0;
virtual void on_client_connected(const std::uint32_t id) = 0;
virtual void on_client_disconnected(const std::uint32_t id) = 0;
virtual void server(Server *server)
{
_server = server;
}
protected:
[[nodiscard]] Server *server() const
{
return _server;
}
private:
Server *_server = nullptr;
};
class Server
{
public:
Server(ClientHandler &message_handler, std::uint16_t port) noexcept;
~Server() noexcept = default;
[[nodiscard]] std::uint16_t port() const noexcept
{
return _port;
}
[[nodiscard]] bool is_running() const noexcept
{
return _is_running;
}
void stop() noexcept
{
_is_running = false;
}
void send(std::uint32_t client_id, std::string &&message);
bool listen();
private:
const std::uint16_t _port;
std::int32_t _socket;
std::array<std::uint32_t, Config::max_clients> _client_sockets;
std::array<char, 512> _buffer;
ClientHandler &_handler;
alignas(64) bool _is_running = true;
std::uint16_t add_client(std::int32_t client_socket);
};
} // namespace beedb::network