f3eade2f62
Drop the AGPL license in favor of a source-available license. See the blog post [1] for details. [1] https://www.scylladb.com/2024/12/18/why-were-moving-to-a-source-available-license/
83 lines
2.4 KiB
C++
83 lines
2.4 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: LicenseRef-ScyllaDB-Source-Available-1.0
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*/
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#pragma once
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#include <cstdint>
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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 host_id_or_addr = std::variant<locator::host_id, gms::inet_address>;
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using shard_rps = std::unordered_map<host_id_or_addr, 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(std::string_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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// 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_or_v2 {
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std::vector<gms::inet_address> endpoints;
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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_or_v2 {
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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_or_v2 regular_sp;
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// Sync point information for materialized view hints
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db::hints::per_manager_sync_point_v1_or_v2 mv_sp;
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};
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// IDL type
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// same as per_manager_sync_point_v1_or_v2 except that it stores the
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// endpoints as host_id instead of address
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struct per_manager_sync_point_v3 {
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std::vector<locator::host_id> endpoints;
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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_v3 {
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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_v3 regular_sp;
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// Sync point information for materialized view hints
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db::hints::per_manager_sync_point_v3 mv_sp;
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};
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}
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}
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