7017ad6822
So it could be used also for easily searching for an endpoint. Signed-off-by: Benny Halevy <bhalevy@scylladb.com>
62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
/*
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*
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* Modified by ScyllaDB
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* Copyright (C) 2015-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: (AGPL-3.0-or-later and Apache-2.0)
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*/
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#pragma once
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#include "locator/abstract_replication_strategy.hh"
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#include "exceptions/exceptions.hh"
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#include <optional>
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#include <set>
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namespace locator {
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class network_topology_strategy : public abstract_replication_strategy {
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public:
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network_topology_strategy(
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const replication_strategy_config_options& config_options);
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virtual size_t get_replication_factor(const token_metadata&) const override {
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return _rep_factor;
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}
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size_t get_replication_factor(const sstring& dc) const {
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auto dc_factor = _dc_rep_factor.find(dc);
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return (dc_factor == _dc_rep_factor.end()) ? 0 : dc_factor->second;
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}
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const std::vector<sstring>& get_datacenters() const {
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return _datacenteres;
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}
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virtual bool allow_remove_node_being_replaced_from_natural_endpoints() const override {
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return true;
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}
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protected:
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/**
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* calculate endpoints in one pass through the tokens by tracking our
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* progress in each DC, rack etc.
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*/
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virtual future<endpoint_set> calculate_natural_endpoints(
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const token& search_token, const token_metadata& tm) const override;
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virtual void validate_options() const override;
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virtual std::optional<std::set<sstring>> recognized_options(const topology&) const override;
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private:
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// map: data centers -> replication factor
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std::unordered_map<sstring, size_t> _dc_rep_factor;
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std::vector<sstring> _datacenteres;
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size_t _rep_factor;
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};
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} // namespace locator
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