02bb70da19
Before we implement the manual recovery tool, we must support zero-token nodes in the recovery mode. This means that two topology operations involving zero-token nodes must work in the gossip-based topology: - removing a dead zero-token node, - restarting a live zero-token node. We make changes necessary to make them work in this patch.
103 lines
3.6 KiB
C++
103 lines
3.6 KiB
C++
/*
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*
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* Modified by ScyllaDB
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* Copyright (C) 2015-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: (AGPL-3.0-or-later and Apache-2.0)
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*/
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#include "gms/endpoint_state.hh"
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#include "gms/i_endpoint_state_change_subscriber.hh"
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#include <ostream>
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#include <boost/lexical_cast.hpp>
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#include "log.hh"
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namespace gms {
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logging::logger logger("endpoint_state");
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static_assert(std::is_default_constructible_v<heart_beat_state>);
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static_assert(std::is_nothrow_copy_constructible_v<heart_beat_state>);
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static_assert(std::is_nothrow_move_constructible_v<heart_beat_state>);
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static_assert(std::is_nothrow_default_constructible_v<application_state_map>);
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// Note: although std::map::find is not guaranteed to be noexcept
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// it depends on the comparator used and in this case comparing application_state
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// is noexcept. Therefore, we can safely mark this method noexcept.
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const versioned_value* endpoint_state::get_application_state_ptr(application_state key) const noexcept {
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auto it = _application_state.find(key);
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if (it == _application_state.end()) {
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return nullptr;
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} else {
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return &it->second;
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}
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}
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bool endpoint_state::is_cql_ready() const noexcept {
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auto* app_state = get_application_state_ptr(application_state::RPC_READY);
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if (!app_state) {
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return false;
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}
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try {
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return boost::lexical_cast<int>(app_state->value());
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} catch (...) {
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return false;
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}
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}
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locator::host_id endpoint_state::get_host_id() const noexcept {
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locator::host_id host_id;
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if (auto app_state = get_application_state_ptr(application_state::HOST_ID)) {
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host_id = locator::host_id(utils::UUID(app_state->value()));
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if (!host_id) {
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on_internal_error_noexcept(logger, format("Node has null host_id"));
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}
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}
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return host_id;
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}
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std::optional<locator::endpoint_dc_rack> endpoint_state::get_dc_rack() const {
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if (const auto* dc_state = get_application_state_ptr(application_state::DC)) {
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const auto* rack_state = get_application_state_ptr(application_state::RACK);
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if (dc_state->value().empty() || !rack_state || rack_state->value().empty()) {
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on_internal_error_noexcept(logger, format("Node {} has empty dc={} or rack={}", get_host_id(), dc_state->value(), rack_state ? rack_state->value() : "(null)"));
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} else {
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return std::make_optional<locator::endpoint_dc_rack>(dc_state->value(), rack_state->value());
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}
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}
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return std::nullopt;
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}
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std::unordered_set<dht::token> endpoint_state::get_tokens() const {
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std::unordered_set<dht::token> ret;
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if (auto app_state = get_application_state_ptr(application_state::TOKENS)) {
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ret = versioned_value::tokens_from_string(app_state->value());
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}
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return ret;
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}
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future<> i_endpoint_state_change_subscriber::on_application_state_change(inet_address endpoint,
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const gms::application_state_map& states, application_state app_state, permit_id pid,
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std::function<future<>(inet_address, const gms::versioned_value&, permit_id)> func) {
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auto it = states.find(app_state);
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if (it != states.end()) {
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return func(endpoint, it->second, pid);
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}
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return make_ready_future<>();
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}
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}
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auto fmt::formatter<gms::endpoint_state>::format(const gms::endpoint_state& x,
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fmt::format_context& ctx) const -> decltype(ctx.out()) {
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auto out = ctx.out();
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out = fmt::format_to(out, "HeartBeatState = {}, AppStateMap =", x._heart_beat_state);
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for (auto& [state, value] : x._application_state) {
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out = fmt::format_to(out, " {{ {} : {} }} ", state, value);
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}
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return out;
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}
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