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tdlib-fork/tddb/td/db/KeyValueSyncInterface.h
levlam eaebfad034 Update copyright year.
GitOrigin-RevId: 359e2b43322222922c44c430d3814b0a4c778dc6
2019-01-01 01:02:34 +03:00

36 lines
1.0 KiB
C++

//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#pragma once
#include "td/utils/common.h"
namespace td {
class KeyValueSyncInterface {
public:
// SeqNo is used to restore total order on all write queries.
// Some implementations may return 0 as SeqNo.
using SeqNo = uint64;
KeyValueSyncInterface() = default;
KeyValueSyncInterface(const KeyValueSyncInterface &) = delete;
KeyValueSyncInterface &operator=(const KeyValueSyncInterface &) = delete;
KeyValueSyncInterface(KeyValueSyncInterface &&) = default;
KeyValueSyncInterface &operator=(KeyValueSyncInterface &&) = default;
virtual ~KeyValueSyncInterface() = default;
virtual SeqNo set(string key, string value) = 0;
virtual bool isset(const string &key) = 0;
virtual string get(const string &key) = 0;
virtual SeqNo erase(const string &key) = 0;
};
} // namespace td