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bab12e3a98
now that we are allowed to use C++23. we now have the luxury of using `std::views::transform`. in this change, we: - replace `boost::adaptors::transformed` with `std::views::transform` - use `fmt::join()` when appropriate where `boost::algorithm::join()` is not applicable to a range view returned by `std::view::transform`. - use `std::ranges::fold_left()` to accumulate the range returned by `std::view::transform` - use `std::ranges::fold_left()` to get the maximum element in the range returned by `std::view::transform` - use `std::ranges::min()` to get the minimal element in the range returned by `std::view::transform` - use `std::ranges::equal()` to compare the range views returned by `std::view::transform` - remove unused `#include <boost/range/adaptor/transformed.hpp>` - use `std::ranges::subrange()` instead of `boost::make_iterator_range()`, to feed `std::views::transform()` a view range. to reduce the dependency to boost for better maintainability, and leverage standard library features for better long-term support. this change is part of our ongoing effort to modernize our codebase and reduce external dependencies where possible. limitations: there are still a couple places where we are still using `boost::adaptors::transformed` due to the lack of a C++23 alternative for `boost::join()` and `boost::adaptors::uniqued`. Signed-off-by: Kefu Chai <kefu.chai@scylladb.com> Closes scylladb/scylladb#21700
106 lines
3.4 KiB
C++
106 lines
3.4 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/versioned_value.hh"
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#include "message/messaging_service.hh"
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#include <boost/algorithm/string/split.hpp>
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#include <boost/algorithm/string/classification.hpp>
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#include <charconv>
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namespace gms {
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static_assert(std::is_nothrow_default_constructible_v<versioned_value>);
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static_assert(std::is_nothrow_move_constructible_v<versioned_value>);
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versioned_value versioned_value::network_version() {
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return versioned_value(format("{}", netw::messaging_service::current_version));
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}
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sstring versioned_value::make_full_token_string(const std::unordered_set<dht::token>& tokens) {
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return fmt::to_string(fmt::join(tokens | std::views::transform([] (const dht::token& t) {
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return t.to_sstring(); }), ";"));
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}
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sstring versioned_value::make_token_string(const std::unordered_set<dht::token>& tokens) {
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if (tokens.empty()) {
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return "";
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}
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return tokens.begin()->to_sstring();
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}
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sstring versioned_value::make_cdc_generation_id_string(std::optional<cdc::generation_id> gen_id) {
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// We assume that the db_clock epoch is the same on all receiving nodes.
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if (!gen_id) {
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return "";
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}
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return std::visit(make_visitor(
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[] (const cdc::generation_id_v1& id) -> sstring {
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return std::to_string(id.ts.time_since_epoch().count());
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},
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[] (const cdc::generation_id_v2& id) {
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// v2;<timestamp>;<uuid>
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return format("v2;{};{}", id.ts.time_since_epoch().count(), id.id);
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}
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), *gen_id);
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}
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std::unordered_set<dht::token> versioned_value::tokens_from_string(const sstring& s) {
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if (s.size() == 0) {
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return {}; // boost::split produces one element for empty string
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}
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std::vector<sstring> tokens;
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boost::split(tokens, s, boost::is_any_of(";"));
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std::unordered_set<dht::token> ret;
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for (auto str : tokens) {
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ret.emplace(dht::token::from_sstring(str));
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}
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return ret;
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}
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std::optional<cdc::generation_id> versioned_value::cdc_generation_id_from_string(const sstring& s) {
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if (s.empty()) {
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return {};
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}
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if (std::string_view(s).starts_with("v2;")) {
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// v2;<timestamp>;<uuid>
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constexpr auto invalid_format_template = "Invalid value of CDC generation ID string: {}. The format is \"v2;<timestamp>;<uuid>\".";
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const char* const end = s.c_str() + s.size();
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int64_t ts;
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auto r = std::from_chars(s.c_str() + 3, end, ts);
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if (r.ec != std::errc() || r.ptr == end || *r.ptr != ';') {
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throw std::runtime_error(format(invalid_format_template, s));
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}
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++r.ptr; // r.ptr now points to <uuid>
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if (r.ptr == end) {
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throw std::runtime_error(format(invalid_format_template, s));
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}
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try {
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auto tp = db_clock::time_point{db_clock::duration{ts}};
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auto id = utils::UUID{std::string_view{r.ptr, end}};
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return cdc::generation_id_v2{tp, id};
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} catch (...) {
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throw std::runtime_error(format(invalid_format_template, s));
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}
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}
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try {
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return cdc::generation_id_v1{db_clock::time_point{db_clock::duration(std::stoll(s))}};
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} catch (...) {
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throw std::runtime_error(format("Invalid value of CDC generation ID string: {}. Should be <timestamp> (an unsigned integer).", s));
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}
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}
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}
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