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
|
/**
* Copyright (C) 2022-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/pipeline/document_source.h"
namespace mongo {
/**
* This aggregation stage is an alias for ‘$shardedDataDistribution’. It takes no arguments. Its
* response will be a cursor, each document of which represents the data-distribution information
* for a particular collection.
*/
namespace DocumentSourceShardedDataDistribution {
static constexpr StringData kStageName = "$shardedDataDistribution"_sd;
class LiteParsed final : public LiteParsedDocumentSource {
public:
static std::unique_ptr<LiteParsed> parse(const NamespaceString& nss, const BSONElement& spec) {
return std::make_unique<LiteParsed>(spec.fieldName());
}
explicit LiteParsed(std::string parseTimeName)
: LiteParsedDocumentSource(std::move(parseTimeName)) {}
stdx::unordered_set<NamespaceString> getInvolvedNamespaces() const final {
return {NamespaceString::kConfigsvrCollectionsNamespace};
}
PrivilegeVector requiredPrivileges(bool isMongos, bool bypassDocumentValidation) const final {
return {
Privilege(ResourcePattern::forClusterResource(), ActionType::shardedDataDistribution)};
}
bool isInitialSource() const final {
return true;
}
};
static std::list<boost::intrusive_ptr<DocumentSource>> createFromBson(
BSONElement elem, const boost::intrusive_ptr<ExpressionContext>& expCtx);
}; // namespace DocumentSourceShardedDataDistribution
} // namespace mongo
|
