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I used the following as a reference: https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/db/virtual/ClientsTable.java At this moment there is only info about IP, clients outgoing port, client 'type' (i.e. CQL/thrift/alternator), shard ID and username. Column `request_count' is NOT present and CK consists of (`port', `client_type'), contrary to what C*'s has: (`port'). Code that notifies `system.clients` about new connections goes to top-level files `connection_notifier.*`. Currently only CQL clients are observed, but enum `client_type` can be used in future to notify about connections with other protocols.
58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
/*
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* Copyright (C) 2019 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 "gms/inet_address.hh"
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#include <seastar/core/sstring.hh>
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#include <optional>
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enum class client_type {
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cql = 0,
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thrift,
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alternator,
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};
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// Representation of a row in `system.clients'. std::optionals are for nullable cells.
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struct client_data {
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gms::inet_address ip;
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int32_t port;
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client_type ct;
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int32_t shard_id; /// ID of server-side shard which is processing the connection.
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// `optional' column means that it's nullable (possibly because it's
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// unimplemented yet). If you want to fill ("implement") any of them,
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// remember to update the query in `notify_new_client()'.
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std::optional<sstring> connection_stage;
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std::optional<sstring> driver_name;
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std::optional<sstring> driver_version;
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std::optional<sstring> hostname;
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std::optional<int32_t> protocol_version;
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std::optional<sstring> ssl_cipher_suite;
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std::optional<bool> ssl_enabled;
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std::optional<sstring> ssl_protocol;
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std::optional<sstring> username;
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};
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future<> notify_new_client(client_data cd);
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future<> notify_disconnected_client(gms::inet_address addr, client_type ct, int port);
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future<> clear_clientlist();
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