blob: 01f25fe6f5db311cb824dc3ee9836e03d515d392 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include "mongo/db/server_options.h"
namespace mongo {
/**
* Helpers to parse featureCompatibilityVersion document BSON objects into
* ServerGlobalParams::FeatureCompatibility::Version enums and convert
* ServerGlobalParams::FeatureCompatibility::Version enums into strings.
*/
class FeatureCompatibilityVersionParser {
public:
static constexpr StringData kVersion44 = "4.4"_sd;
static constexpr StringData kVersion451 = "4.5.1"_sd;
static constexpr StringData kVersionDowngradingFrom451To44 = "downgrading from 4.5.1 to 4.4"_sd;
static constexpr StringData kVersionUpgradingFrom44To451 = "upgrading from 4.4 to 4.5.1"_sd;
static constexpr StringData kVersionUnset = "Unset"_sd;
static constexpr StringData kParameterName = "featureCompatibilityVersion"_sd;
static constexpr StringData kVersionField = "version"_sd;
static constexpr StringData kTargetVersionField = "targetVersion"_sd;
/**
* Parses the featureCompatibilityVersion document from the server configuration collection
* (admin.system.version), and returns the state represented by the combination of the
* targetVersion and version.
*/
static StatusWith<ServerGlobalParams::FeatureCompatibility::Version> parse(
const BSONObj& featureCompatibilityVersionDoc);
/**
* Useful for message logging.
*/
static StringData toString(ServerGlobalParams::FeatureCompatibility::Version version) {
switch (version) {
case ServerGlobalParams::FeatureCompatibility::Version::kUnsetDefault44Behavior:
return kVersionUnset;
case ServerGlobalParams::FeatureCompatibility::Version::kFullyDowngradedTo44:
return kVersion44;
case ServerGlobalParams::FeatureCompatibility::Version::kUpgradingFrom44To451:
return kVersionUpgradingFrom44To451;
case ServerGlobalParams::FeatureCompatibility::Version::kDowngradingFrom451To44:
return kVersionDowngradingFrom451To44;
case ServerGlobalParams::FeatureCompatibility::Version::kVersion451:
return kVersion451;
default:
MONGO_UNREACHABLE;
}
}
};
} // namespace mongo
|
