d295d8e280
So it can be distinguished from other uuid-based identifiers in the system. Signed-off-by: Benny Halevy <bhalevy@scylladb.com> Closes #11276
65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
/*
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* Copyright (C) 2021-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#pragma once
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#include <cstdint>
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#include <string_view>
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#include <unordered_map>
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#include <vector>
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#include <seastar/core/sstring.hh>
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#include "gms/inet_address.hh"
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#include "db/commitlog/replay_position.hh"
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#include "locator/host_id.hh"
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namespace db {
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namespace hints {
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// A sync point is a collection of positions in hint queues which can be waited on.
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// The sync point encompasses one type of hints manager only.
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struct sync_point {
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using shard_rps = std::unordered_map<gms::inet_address, db::replay_position>;
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// ID of the host which created this sync point
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locator::host_id host_id;
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std::vector<shard_rps> regular_per_shard_rps;
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std::vector<shard_rps> mv_per_shard_rps;
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/// \brief Decodes a sync point from an encoded, textual form (a hexadecimal string).
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static sync_point decode(sstring_view s);
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/// \brief Encodes the sync point in a textual form (a hexadecimal string)
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sstring encode() const;
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bool operator==(const sync_point& other) const = default;
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};
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std::ostream& operator<<(std::ostream& out, const sync_point& sp);
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// IDL type
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// Contains per-endpoint and per-shard information about replay positions
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// for a particular type of hint queues (regular mutation hints or MV update hints)
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struct per_manager_sync_point_v1 {
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std::vector<gms::inet_address> addresses;
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std::vector<db::replay_position> flattened_rps;
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};
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// IDL type
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struct sync_point_v1 {
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locator::host_id host_id;
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uint16_t shard_count;
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// Sync point information for regular mutation hints
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db::hints::per_manager_sync_point_v1 regular_sp;
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// Sync point information for materialized view hints
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db::hints::per_manager_sync_point_v1 mv_sp;
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};
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}
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}
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