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1865e5da41
Many headers don't really need to include database.hh, the include can be replaced by forward declarations and/or including the actually needed headers directly. Some headers don't need this include at all. Each header was verified to be compilable on its own after the change, by including it into an empty `.cc` file and compiling it. `.cc` files that used to get `database.hh` through headers that no longer include it were changed to include it themselves.
101 lines
3.5 KiB
C++
101 lines
3.5 KiB
C++
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Modified by ScyllaDB
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* Copyright 2015 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 "database_fwd.hh"
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#include "gms/i_endpoint_state_change_subscriber.hh"
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#include "gms/gossiper.hh"
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namespace service {
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class load_broadcaster : public gms::i_endpoint_state_change_subscriber, public enable_shared_from_this<load_broadcaster>
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{
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public:
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static constexpr std::chrono::milliseconds BROADCAST_INTERVAL{60 * 1000};
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private:
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distributed<database>& _db;
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gms::gossiper& _gossiper;
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std::unordered_map<gms::inet_address, double> _load_info;
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timer<> _timer;
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future<> _done = make_ready_future<>();
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public:
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load_broadcaster(distributed<database>& db, gms::gossiper& g) : _db(db), _gossiper(g) {
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_gossiper.register_(shared_from_this());
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}
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~load_broadcaster() {
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_gossiper.unregister_(shared_from_this());
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}
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void on_change(gms::inet_address endpoint, gms::application_state state, const gms::versioned_value& value) {
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if (state == gms::application_state::LOAD) {
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_load_info[endpoint] = std::stod(value.value);
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}
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}
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void on_join(gms::inet_address endpoint, gms::endpoint_state ep_state) override {
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auto* local_value = ep_state.get_application_state_ptr(gms::application_state::LOAD);
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if (local_value) {
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on_change(endpoint, gms::application_state::LOAD, *local_value);
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}
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}
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void before_change(gms::inet_address endpoint, gms::endpoint_state current_state, gms::application_state new_state_key, const gms::versioned_value& newValue) {}
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void on_alive(gms::inet_address endpoint, gms::endpoint_state) override {}
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void on_dead(gms::inet_address endpoint, gms::endpoint_state) override {}
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void on_restart(gms::inet_address endpoint, gms::endpoint_state) override {}
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void on_remove(gms::inet_address endpoint) {
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_load_info.erase(endpoint);
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}
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const std::unordered_map<gms::inet_address, double> get_load_info() const {
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return _load_info;
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}
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void start_broadcasting();
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future<> stop_broadcasting();
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};
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}
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