7215d4bfe9
these unused includes were identifier by clang-include-cleaner. after auditing these source files, all of the reports have been confirmed. please note, because quite a few source files relied on `utils/to_string.hh` to pull in the specialization of `fmt::formatter<std::optional<T>>`, after removing `#include <fmt/std.h>` from `utils/to_string.hh`, we have to include `fmt/std.h` directly. Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
74 lines
2.1 KiB
C++
74 lines
2.1 KiB
C++
/*
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* Copyright 2020-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: LicenseRef-ScyllaDB-Source-Available-1.0
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*/
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#pragma once
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#include <seastar/core/on_internal_error.hh>
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#include "serializer.hh"
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#include "schema/schema.hh"
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#include "utils/log.hh"
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extern logging::logger dblog;
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namespace db {
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/**
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* \brief Schema extension which represents `paxos_grace_seconds` per-table option.
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*
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* The option defines the TTL value which used for inserts/updates to the paxos
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* tables when LWT queries are used against the base table.
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*
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* This value is intentionally decoupled from `gc_grace_seconds` since,
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* in general, the base table could use completely different strategy to garbage
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* collect entries, e.g. can set `gc_grace_seconds` to 0 if it doesn't use
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* deletions and hence doesn't need to repair.
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*
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* However, paxos tables still rely on repair to achieve consistency, and
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* the user is required to execute repair within `paxos_grace_seconds`.
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*/
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class paxos_grace_seconds_extension : public schema_extension {
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int32_t _paxos_gc_sec;
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public:
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static constexpr auto NAME = "paxos_grace_seconds";
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paxos_grace_seconds_extension() = default;
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explicit paxos_grace_seconds_extension(int32_t seconds)
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: _paxos_gc_sec(seconds)
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{}
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explicit paxos_grace_seconds_extension(const std::map<sstring, sstring>& map) {
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on_internal_error(dblog, "Cannot create paxos_grace_seconds_extensions from map");
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}
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explicit paxos_grace_seconds_extension(bytes b) : _paxos_gc_sec(deserialize(b))
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{}
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explicit paxos_grace_seconds_extension(const sstring& s)
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: _paxos_gc_sec(std::stoi(s))
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{}
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bytes serialize() const override {
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return ser::serialize_to_buffer<bytes>(_paxos_gc_sec);
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}
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std::string options_to_string() const override {
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return std::to_string(_paxos_gc_sec);
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}
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static int32_t deserialize(const bytes_view& buffer) {
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return ser::deserialize_from_buffer(buffer, std::type_identity<int32_t>());
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}
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int32_t get_paxos_grace_seconds() const {
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return _paxos_gc_sec;
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}
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};
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} // namespace db
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