stop_signal_handler.h

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/*
 * Copyright 2023 MusicScience37 (Kenta Kabashima)
 *
 * 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 <csignal>
#include <memory>
#include <utility>
 
#include <asio/error_code.hpp>
#include <asio/io_context.hpp>
#include <asio/signal_set.hpp>
 
#include "msgpack_rpc/logging/logger.h"
 
namespace msgpack_rpc::servers {

class StopSignalHandler {
public:
    explicit StopSignalHandler(std::shared_ptr<logging::Logger> logger)
        : context_(1),
          signal_set_(context_, SIGINT, SIGTERM),
          logger_(std::move(logger)) {}

    void wait() {
        signal_set_.async_wait(
            [this](const asio::error_code& error, int signal_number) {
                if (!error) {
                    MSGPACK_RPC_DEBUG(
                        logger_, "Received signal {}.", signal_number);
                }
            });
        context_.run();
    }

    void stop() { context_.stop(); }
 
private:
    asio::io_context context_;

    asio::signal_set signal_set_;

    std::shared_ptr<logging::Logger> logger_;
};
 
}  // namespace msgpack_rpc::servers