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// Copyright (c) 2019 Egor Tensin <Egor.Tensin@gmail.com>
// This file is part of the "math-server" project.
// For details, see https://github.com/egor-tensin/math-server.
// Distributed under the MIT License.
#include "server.hpp"
#include "../common/error.hpp"
#include "../common/log.hpp"
#include "session.hpp"
#include "session_manager.hpp"
#include "settings.hpp"
#include <boost/asio.hpp>
#include <boost/system/error_code.hpp>
#include <boost/system/system_error.hpp>
#include <cstddef>
#include <exception>
#include <thread>
#include <vector>
namespace math::server {
namespace {
boost::asio::ip::tcp::endpoint make_endpoint(unsigned short port) {
return {boost::asio::ip::tcp::v4(), port};
}
void configure_acceptor(boost::asio::ip::tcp::acceptor& acceptor, unsigned short port) {
try {
const auto endpoint = make_endpoint(port);
acceptor.open(endpoint.protocol());
acceptor.set_option(boost::asio::ip::tcp::acceptor::reuse_address(true));
acceptor.bind(endpoint);
acceptor.listen();
} catch (const boost::system::system_error& e) {
throw Error{e.what()};
}
}
} // namespace
Server::Server(const Settings& settings) : Server{settings.m_port, settings.m_threads} {}
Server::Server(unsigned short port, std::size_t threads)
: m_numof_threads{threads}, m_signals{m_io_context}, m_acceptor{m_io_context} {
wait_for_signal();
configure_acceptor(m_acceptor, port);
accept();
}
void Server::run() {
std::vector<std::thread> threads{m_numof_threads};
for (std::size_t i = 0; i < m_numof_threads; ++i) {
threads[i] = std::thread{[this]() { m_io_context.run(); }};
}
for (std::size_t i = 0; i < m_numof_threads; ++i) {
threads[i].join();
}
}
void Server::wait_for_signal() {
try {
m_signals.add(SIGINT);
m_signals.add(SIGTERM);
m_signals.async_wait(
[this](const boost::system::error_code& ec, int signo) { handle_signal(ec, signo); });
} catch (const boost::system::system_error& e) {
throw Error{e.what()};
}
}
void Server::handle_signal(const boost::system::error_code& ec, int signo) {
if (ec) {
log::error("%1%: %2%", __func__, ec.message());
}
log::log("Caught signal %1%", signo);
try {
m_acceptor.close();
m_session_mgr.stop_all();
} catch (const std::exception& e) {
log::error(e.what());
}
}
void Server::accept() {
const auto session = m_session_mgr.make_session(m_io_context);
m_acceptor.async_accept(
session->socket(),
[session, this](const boost::system::error_code& ec) { handle_accept(session, ec); });
}
void Server::handle_accept(SessionPtr session, const boost::system::error_code& ec) {
if (ec) {
log::error("%1%: %2%", __func__, ec.message());
return;
}
m_session_mgr.start(session);
accept();
}
} // namespace math::server
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