mirror of
https://github.com/scylladb/scylladb.git
synced 2026-04-27 11:55:15 +00:00
3689db26fc
Pull up the cql_server process() to base class and convert redis_server
to use it.
Please note that this fixes EPIPE and connection reset issue in the
Redis server, which was fixed in the CQL server in commit 1a8630e6a
("transport: silence "broken pipe" and "connection reset by peer"
errors").
105 lines
2.8 KiB
C++
105 lines
2.8 KiB
C++
/*
|
|
* Copyright (C) 2021 ScyllaDB
|
|
*/
|
|
|
|
/*
|
|
* This file is part of Scylla.
|
|
*
|
|
* Scylla is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Scylla is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "generic_server.hh"
|
|
|
|
namespace generic_server {
|
|
|
|
connection::connection(server& server, connected_socket&& fd)
|
|
: _server{server}
|
|
, _fd{std::move(fd)}
|
|
, _read_buf(_fd.input())
|
|
, _write_buf(_fd.output())
|
|
{
|
|
++_server._total_connections;
|
|
++_server._current_connections;
|
|
_server._connections_list.push_back(*this);
|
|
}
|
|
|
|
connection::~connection()
|
|
{
|
|
--_server._current_connections;
|
|
_server._connections_list.erase(_server._connections_list.iterator_to(*this));
|
|
_server.maybe_idle();
|
|
}
|
|
|
|
static bool is_broken_pipe_or_connection_reset(std::exception_ptr ep) {
|
|
try {
|
|
std::rethrow_exception(ep);
|
|
} catch (const std::system_error& e) {
|
|
return e.code().category() == std::system_category()
|
|
&& (e.code().value() == EPIPE || e.code().value() == ECONNRESET);
|
|
} catch (...) {}
|
|
return false;
|
|
}
|
|
|
|
future<> connection::process()
|
|
{
|
|
return with_gate(_pending_requests_gate, [this] {
|
|
return do_until([this] {
|
|
return _read_buf.eof();
|
|
}, [this] {
|
|
return process_request();
|
|
}).then_wrapped([this] (future<> f) {
|
|
handle_error(std::move(f));
|
|
});
|
|
}).finally([this] {
|
|
return _pending_requests_gate.close().then([this] {
|
|
on_connection_close();
|
|
return _ready_to_respond.handle_exception([] (std::exception_ptr ep) {
|
|
if (is_broken_pipe_or_connection_reset(ep)) {
|
|
// expected if another side closes a connection or we're shutting down
|
|
return;
|
|
}
|
|
std::rethrow_exception(ep);
|
|
}).finally([this] {
|
|
return _write_buf.close();
|
|
});
|
|
});
|
|
});
|
|
}
|
|
|
|
void connection::on_connection_close()
|
|
{
|
|
}
|
|
|
|
future<> connection::shutdown()
|
|
{
|
|
try {
|
|
_fd.shutdown_input();
|
|
_fd.shutdown_output();
|
|
} catch (...) {
|
|
}
|
|
return make_ready_future<>();
|
|
}
|
|
|
|
server::~server()
|
|
{
|
|
}
|
|
|
|
void server::maybe_idle() {
|
|
if (_stopping && !_connections_being_accepted && !_current_connections) {
|
|
_all_connections_stopped.set_value();
|
|
}
|
|
}
|
|
|
|
}
|