Method updateServers

programs/server/Server.cpp:4053–4161

}

void Server::updateServers(
    Poco::Util::AbstractConfiguration & config,
    const ServerSettings & server_settings,
    Poco::ThreadPool & server_pool,
    AsynchronousMetrics & async_metrics,
    std::vector<ProtocolServerAdapter> & servers,
    std::vector<ProtocolServerAdapter> & servers_to_start_before_tables)
{
    LoggerRawPtr log = &logger();

    const auto listen_hosts = getListenHosts(config);
    const auto interserver_listen_hosts = getInterserverListenHosts(config);
    const auto listen_try = getListenTry(config, server_settings);

    /// Remove servers once all their connections are closed
    auto check_server = [&log](const char prefix[], auto & server)
    {
        if (!server.isStopping())
            return false;
        size_t current_connections = server.currentConnections();
        LOG_DEBUG(log, "Server {}{}: {} ({} connections)",
            server.getDescription(),
            prefix,
            !current_connections ? "finished" : "waiting",
            current_connections);
        return !current_connections;
    };

    std::erase_if(servers, std::bind_front(check_server, " (from one of previous reload)"));

    Poco::Util::AbstractConfiguration & previous_config = latest_config ? *latest_config : config;

    std::vector<ProtocolServerAdapter *> all_servers;
    all_servers.reserve(servers.size() + servers_to_start_before_tables.size());
    for (auto & server : servers)
        all_servers.push_back(&server);

    for (auto & server : servers_to_start_before_tables)
        all_servers.push_back(&server);

    for (auto * server : all_servers)
    {
        if (server->supportsRuntimeReconfiguration() && !server->isStopping())
        {
            std::string port_name = server->getPortName();
            bool has_host = false;
            bool is_http = false;
            String handlers_key = "http_handlers";
            if (port_name.starts_with("protocols."))
            {
                std::string protocol = port_name.substr(0, port_name.find_last_of('.'));
                has_host = config.has(protocol + ".host");

                std::string conf_name = protocol;
                std::string prefix = protocol + ".";
                std::unordered_set<std::string> pset {conf_name};
                while (true)
                {