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68 lines
2.4 KiB
C++
68 lines
2.4 KiB
C++
/*
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* Copyright (C) 2016 ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "sstables.hh"
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#include "query-request.hh" // for partition_range; FIXME: move it out of there
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#include <seastar/core/shared_ptr.hh>
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#include <vector>
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namespace sstables {
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class sstable_set_impl;
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class incremental_selector_impl;
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class sstable_set {
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std::unique_ptr<sstable_set_impl> _impl;
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// used to support column_family::get_sstable(), which wants to return an sstable_list
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// that has a reference somewhere
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lw_shared_ptr<sstable_list> _all;
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public:
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~sstable_set();
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sstable_set(std::unique_ptr<sstable_set_impl> impl, lw_shared_ptr<sstable_list> all);
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sstable_set(const sstable_set&);
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sstable_set(sstable_set&&) noexcept;
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sstable_set& operator=(const sstable_set&);
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sstable_set& operator=(sstable_set&&) noexcept;
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std::vector<shared_sstable> select(const dht::partition_range& range) const;
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lw_shared_ptr<sstable_list> all() const { return _all; }
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void insert(shared_sstable sst);
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void erase(shared_sstable sst);
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// Used to incrementally select sstables from sstable set using tokens.
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// sstable set must be alive and cannot be modified while incremental
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// selector is used.
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class incremental_selector {
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std::unique_ptr<incremental_selector_impl> _impl;
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mutable stdx::optional<dht::token_range> _current_token_range;
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mutable std::vector<shared_sstable> _current_sstables;
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public:
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~incremental_selector();
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incremental_selector(std::unique_ptr<incremental_selector_impl> impl);
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incremental_selector(incremental_selector&&) noexcept;
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const std::vector<shared_sstable>& select(const dht::token& t) const;
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};
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incremental_selector make_incremental_selector() const;
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};
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}
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