d5b4b02b28
We've updated all the places where token_metadata is mutated, and now we can progress to the next stage of the refactoring - gradually switching the read code paths. The calculate_natural_endpoints function is at the core of all of them. It decides to what nodes the given token should be replicated to for the given token_metadata. It has a lot of usages in various contexts, we can't switch them all in one commit, so instead we allowed the function to behave in both ways. If use_host_id parameter is false, the function uses the provided token_metadata as is and returns endpoint_set as a result. If it's true, it uses get_new() on the provided token_metadata and returns host_id_set as a result. The scope of the whole refactoring is limited to the erm data structure, its interface will be kept inet_address based for now. This means we'll often need to resolve host_ids to inet_address-es as soon as we got a result from calculated_natural_endpoints. A new calculate_natural_ips function is added for convenience. It uses the new token_metadata and immediately resolves returned host_id-s to inet_address-es. The auxiliary declarations natural_ep_type, set_type, vector_type, get_self_id, select_tm are introduced only for the sake of migration, they will be removed later.
22 lines
541 B
C++
22 lines
541 B
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 "gms/inet_address.hh"
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#include "locator/host_id.hh"
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#include "utils/small_vector.hh"
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using inet_address_vector_replica_set = utils::small_vector<gms::inet_address, 3>;
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using inet_address_vector_topology_change = utils::small_vector<gms::inet_address, 1>;
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using host_id_vector_replica_set = utils::small_vector<locator::host_id, 3>;
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using host_id_vector_topology_change = utils::small_vector<locator::host_id, 1>;
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