mirror of
https://github.com/scylladb/scylladb.git
synced 2026-04-24 02:20:37 +00:00
c5d819ce60
and provide accessor functions to get them. 1. So they can't be modified by mistake, as the versioned value is immutable. A new value must have a higher version. 2. Before making the version a strong gms::version_type. Signed-off-by: Benny Halevy <bhalevy@scylladb.com>
74 lines
2.4 KiB
C++
74 lines
2.4 KiB
C++
/*
|
|
* Modified by ScyllaDB
|
|
* Copyright 2015-present ScyllaDB
|
|
*/
|
|
|
|
/*
|
|
* SPDX-License-Identifier: (AGPL-3.0-or-later and Apache-2.0)
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "replica/database_fwd.hh"
|
|
#include "gms/i_endpoint_state_change_subscriber.hh"
|
|
#include "gms/gossiper.hh"
|
|
|
|
namespace service {
|
|
class load_broadcaster : public gms::i_endpoint_state_change_subscriber, public enable_shared_from_this<load_broadcaster>
|
|
{
|
|
public:
|
|
static constexpr std::chrono::milliseconds BROADCAST_INTERVAL{60 * 1000};
|
|
|
|
private:
|
|
distributed<replica::database>& _db;
|
|
gms::gossiper& _gossiper;
|
|
std::unordered_map<gms::inet_address, double> _load_info;
|
|
timer<> _timer;
|
|
future<> _done = make_ready_future<>();
|
|
bool _stopped = false;
|
|
|
|
public:
|
|
load_broadcaster(distributed<replica::database>& db, gms::gossiper& g) : _db(db), _gossiper(g) {
|
|
_gossiper.register_(shared_from_this());
|
|
}
|
|
~load_broadcaster() {
|
|
assert(_stopped);
|
|
}
|
|
|
|
virtual future<> on_change(gms::inet_address endpoint, gms::application_state state, const gms::versioned_value& value) override {
|
|
if (state == gms::application_state::LOAD) {
|
|
_load_info[endpoint] = std::stod(value.value());
|
|
}
|
|
return make_ready_future();
|
|
}
|
|
|
|
virtual future<> on_join(gms::inet_address endpoint, gms::endpoint_state ep_state) override {
|
|
auto* local_value = ep_state.get_application_state_ptr(gms::application_state::LOAD);
|
|
if (local_value) {
|
|
return on_change(endpoint, gms::application_state::LOAD, *local_value);
|
|
}
|
|
return make_ready_future();
|
|
}
|
|
|
|
virtual future<> before_change(gms::inet_address endpoint, gms::endpoint_state current_state, gms::application_state new_state_key, const gms::versioned_value& newValue) override { return make_ready_future(); }
|
|
|
|
future<> on_alive(gms::inet_address endpoint, gms::endpoint_state) override { return make_ready_future(); }
|
|
|
|
future<> on_dead(gms::inet_address endpoint, gms::endpoint_state) override { return make_ready_future(); }
|
|
|
|
future<> on_restart(gms::inet_address endpoint, gms::endpoint_state) override { return make_ready_future(); }
|
|
|
|
virtual future<> on_remove(gms::inet_address endpoint) override {
|
|
_load_info.erase(endpoint);
|
|
return make_ready_future();
|
|
}
|
|
|
|
const std::unordered_map<gms::inet_address, double> get_load_info() const {
|
|
return _load_info;
|
|
}
|
|
|
|
void start_broadcasting();
|
|
future<> stop_broadcasting();
|
|
};
|
|
}
|