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
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
/**
* Copyright (C) 2019-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 <vector>
namespace mongo {
class IndexBuildEntry;
class CommitQuorumOptions;
class OperationContext;
class Status;
template <typename T>
class StatusWith;
class UUID;
struct HostAndPort;
/**
* Format of IndexBuildEntry:
* {
* _id : indexBuildUUID,
* collectionUUID : <UUID>,
* commitQuorum : <BSON>,
* indexes : [<index_name1>, <index_name2>, ...],
* commitReadyMembers : [
* <hostAndPort1>,
* <hostAndPort2>,
* ...
* ]
* }
*/
namespace indexbuildentryhelpers {
/**
* Creates the "config.system.indexBuilds" collection if it does not already exist.
* This is the collection where the IndexBuildEntries will be stored on disk for active index
* builds.
*
* The collection should exist before calling any other helper functions to prevent them from
* failing.
*/
void ensureIndexBuildEntriesNamespaceExists(OperationContext* opCtx);
/**
* Persist the host and port information about the replica set members that have voted to commit an
* index build into config.system.indexBuilds collection. If the member info is already present in
* the collection for that index build, then we don't do any updates and don't generate any errors.
*
* Returns an error if collection is missing.
*/
Status persistCommitReadyMemberInfo(OperationContext* opCtx,
const IndexBuildEntry& indexBuildEntry);
/**
* Persist the new commit quorum value for an index build into config.system.indexBuilds collection.
*
* Returns an error if collection is missing.
*/
Status persistIndexCommitQuorum(OperationContext* opCtx, const IndexBuildEntry& indexBuildEntry);
/**
* Writes the 'indexBuildEntry' to the disk.
*
* An IndexBuildEntry should be stored on the disk during the duration of the index build process
* for the 'indexBuildEntry'.
*
* Returns 'DuplicateKey' error code if a document already exists on the disk with the same
* 'indexBuildUUID'.
*/
Status addIndexBuildEntry(OperationContext* opCtx, const IndexBuildEntry& indexBuildEntry);
/**
* Removes the IndexBuildEntry from the disk.
*
* An IndexBuildEntry should be removed from the disk when the index build either succeeds or fails
* for the given 'indexBuildUUID'.
*
* Returns 'NoMatchingDocument' error code if no document with 'indexBuildUUID' is found.
*/
Status removeIndexBuildEntry(OperationContext* opCtx, UUID indexBuildUUID);
/**
* Returns the IndexBuildEntry matching the document with 'indexBuildUUID' from the disk if it
* exists. Reads at "no" timestamp i.e, reading with the "latest" snapshot reflecting up to date
* data.
*
* If the stored IndexBuildEntry on disk contains invalid BSON, the 'InvalidBSON' error code is
* returned.
*
* Returns 'NoMatchingDocument' error code if no document with 'indexBuildUUID' is found.
*/
StatusWith<IndexBuildEntry> getIndexBuildEntry(OperationContext* opCtx, UUID indexBuildUUID);
/**
* Returns the 'commitQuorum' matching the document with 'indexBuildUUID' from disk if it
* exists.
*
* Returns 'NoMatchingDocument' error code if no document with 'indexBuildUUID' is found.
*/
StatusWith<CommitQuorumOptions> getCommitQuorum(OperationContext* opCtx, UUID indexBuildUUID);
/**
* Sets the documents 'commitQuorum' field matching the document with 'indexBuildUUID'.
*
* Since the commit quorum is configurable until the index build is committed, this should be called
* whenever the commit quorum is changed.
*
* Returns 'NoMatchingDocument' error code if no document with 'indexBuildUUID' is found.
*
* Used for testing only.
*/
Status setCommitQuorum_forTest(OperationContext* opCtx,
UUID indexBuildUUID,
CommitQuorumOptions commitQuorumOptions);
} // namespace indexbuildentryhelpers
} // namespace mongo
|
