1863ccd900
Implement change validation for raft topology_change command. For now the only check is that the "pending replicas" contains at most one entry. The check mirrors similar one in `process_one_row` function. If not passed, this prevents system.tablets from being updated with the mutation(s) that will not be loaded later. Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
99 lines
3.7 KiB
C++
99 lines
3.7 KiB
C++
/*
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* Copyright (C) 2023-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 "types/types.hh"
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#include "types/tuple.hh"
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#include "types/list.hh"
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#include "timestamp.hh"
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#include "locator/tablets.hh"
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#include "schema/schema_fwd.hh"
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#include "mutation/mutation.hh"
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#include "mutation/canonical_mutation.hh"
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#include "replica/database_fwd.hh"
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#include <seastar/core/future.hh>
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#include <vector>
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namespace cql3 {
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class query_processor;
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}
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namespace replica {
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data_type get_replica_set_type();
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data_type get_tablet_info_type();
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schema_ptr make_tablets_schema();
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std::vector<data_value> replicas_to_data_value(const locator::tablet_replica_set& replicas);
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/// Converts information in tablet_map to mutations of system.tablets.
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///
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/// The mutations will delete any older tablet information for the same table.
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/// The provided timestamp should be strictly monotonically increasing
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/// between calls for the overriding to work correctly.
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future<mutation> tablet_map_to_mutation(const locator::tablet_map&,
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table_id,
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const sstring& keyspace_name,
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const sstring& table_name,
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api::timestamp_type);
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mutation make_drop_tablet_map_mutation(table_id, api::timestamp_type);
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/// Stores a given tablet_metadata in system.tablets.
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///
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/// Overrides tablet maps for tables present in the given tablet metadata.
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/// Does not delete tablet maps for tables which are absent in the given tablet metadata.
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/// The provided timestamp should be strictly monotonically increasing
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/// between calls for tablet map overriding to work correctly.
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/// The timestamp must be greater than api::min_timestamp.
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future<> save_tablet_metadata(replica::database&, const locator::tablet_metadata&, api::timestamp_type);
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/// Extract a tablet metadata change hint from the tablet mutations.
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///
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/// Mutations which don't mutate the tablet table are ignored.
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std::optional<locator::tablet_metadata_change_hint> get_tablet_metadata_change_hint(const std::vector<canonical_mutation>&);
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/// Update the tablet metadata change hint, with the changes represented by the tablet mutation.
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///
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/// If the mutation belongs to another table, no updates are done.
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void update_tablet_metadata_change_hint(locator::tablet_metadata_change_hint&, const mutation&);
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/// Reads the replica set from given cell value
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locator::tablet_replica_set tablet_replica_set_from_cell(const data_value&);
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/// Reads tablet metadata from system.tablets.
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future<locator::tablet_metadata> read_tablet_metadata(cql3::query_processor&);
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/// Reads the set of hosts referenced by tablet replicas.
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future<std::unordered_set<locator::host_id>> read_required_hosts(cql3::query_processor&);
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/// Update tablet metadata from system.tablets, based on the provided hint.
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///
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/// The hint is used to determine what has changed and only reload the changed
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/// parts from disk, updating the passed-in metadata in-place accordingly.
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future<> update_tablet_metadata(cql3::query_processor&, locator::tablet_metadata&, const locator::tablet_metadata_change_hint&);
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/// Reads tablet metadata from system.tablets in the form of mutations.
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future<std::vector<canonical_mutation>> read_tablet_mutations(seastar::sharded<database>&);
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/// Reads tablet transition stage (if any)
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future<std::optional<locator::tablet_transition_stage>> read_tablet_transition_stage(cql3::query_processor& qp, table_id tid, dht::token last_token);
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/// Validates changes to system.tablets represented by mutations
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void validate_tablet_metadata_change(const locator::tablet_metadata& tm, const std::vector<canonical_mutation>& mutations);
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} // namespace replica
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