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ton/tddb/td/db/MemoryKeyValue.h
2019-09-07 14:33:36 +04:00

49 lines
1.5 KiB
C++

/*
This file is part of TON Blockchain Library.
TON Blockchain Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
TON Blockchain Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
Copyright 2017-2019 Telegram Systems LLP
*/
#pragma once
#include "td/db/KeyValue.h"
#include <map>
namespace td {
class MemoryKeyValue : public KeyValue {
public:
Result<GetStatus> get(Slice key, std::string &value) override;
Status set(Slice key, Slice value) override;
Status erase(Slice key) override;
Result<size_t> count(Slice prefix) override;
Status begin_transaction() override;
Status commit_transaction() override;
Status abort_transaction() override;
std::unique_ptr<KeyValueReader> snapshot() override;
std::string stats() const override;
private:
class Cmp : public std::less<> {
public:
using is_transparent = void;
};
std::map<std::string, std::string, Cmp> map_;
int64 get_count_{0};
};
} // namespace td