16f262b852
Let's pull up cql_server listen() to generic_server::server base class and convert redis_server to use it.
102 lines
2.7 KiB
C++
102 lines
2.7 KiB
C++
/*
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* Copyright (C) 2021 ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "log.hh"
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#include "seastarx.hh"
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#include <seastar/core/future.hh>
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#include <seastar/core/gate.hh>
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#include <seastar/net/api.hh>
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#include <seastar/net/tls.hh>
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#include <boost/intrusive/list.hpp>
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namespace generic_server {
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class server;
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class connection : public boost::intrusive::list_base_hook<> {
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protected:
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server& _server;
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connected_socket _fd;
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input_stream<char> _read_buf;
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output_stream<char> _write_buf;
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future<> _ready_to_respond = make_ready_future<>();
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seastar::gate _pending_requests_gate;
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public:
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connection(server& server, connected_socket&& fd);
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virtual ~connection();
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virtual future<> process();
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virtual void handle_error(future<>&& f) = 0;
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virtual future<> process_request() = 0;
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virtual void on_connection_close();
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virtual future<> shutdown();
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};
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class server {
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friend class connection;
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protected:
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sstring _server_name;
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logging::logger& _logger;
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bool _stopping = false;
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promise<> _all_connections_stopped;
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uint64_t _current_connections = 0;
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uint64_t _connections_being_accepted = 0;
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uint64_t _total_connections = 0;
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future<> _stopped = _all_connections_stopped.get_future();
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boost::intrusive::list<connection> _connections_list;
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std::vector<server_socket> _listeners;
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public:
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server(const sstring& server_name, logging::logger& logger);
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virtual ~server();
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future<> stop();
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future<> listen(socket_address addr, std::shared_ptr<seastar::tls::credentials_builder> creds, bool is_shard_aware, bool keepalive);
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future<> do_accepts(int which, bool keepalive, socket_address server_addr);
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protected:
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virtual seastar::shared_ptr<connection> make_connection(socket_address server_addr, connected_socket&& fd, socket_address addr) = 0;
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virtual future<> on_stop();
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virtual future<> advertise_new_connection(shared_ptr<connection> conn);
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virtual future<> unadvertise_connection(shared_ptr<connection> conn);
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void maybe_idle();
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};
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}
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