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
|
/**
* 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.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/ftdc/collector.h"
#include "mongo/base/string_data.h"
#include "mongo/bson/bsonmisc.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/db/client.h"
#include "mongo/db/ftdc/constants.h"
#include "mongo/db/ftdc/util.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/operation_context.h"
#include "mongo/util/time_support.h"
namespace mongo {
void FTDCCollectorCollection::add(std::unique_ptr<FTDCCollectorInterface> collector) {
// TODO: ensure the collectors all have unique names.
_collectors.emplace_back(std::move(collector));
}
std::tuple<BSONObj, Date_t> FTDCCollectorCollection::collect(Client* client) {
// If there are no collectors, just return an empty BSONObj so that that are caller knows we did
// not collect anything
if (_collectors.empty()) {
return std::tuple<BSONObj, Date_t>(BSONObj(), Date_t());
}
BSONObjBuilder builder;
Date_t start = client->getServiceContext()->getPreciseClockSource()->now();
Date_t end;
bool firstLoop = true;
builder.appendDate(kFTDCCollectStartField, start);
// All collectors should be ok seeing the inconsistent states in the middle of replication
// batches. This is desirable because we want to be able to collect data in the middle of
// batches that are taking a long time.
auto opCtx = client->makeOperationContext();
ShouldNotConflictWithSecondaryBatchApplicationBlock shouldNotConflictBlock(opCtx->lockState());
opCtx->lockState()->skipAcquireTicket();
// Explicitly start future read transactions without a timestamp.
opCtx->recoveryUnit()->setTimestampReadSource(RecoveryUnit::ReadSource::kNoTimestamp);
for (auto& collector : _collectors) {
BSONObjBuilder subObjBuilder(builder.subobjStart(collector->name()));
// Add a Date_t before and after each BSON is collected so that we can track timing of the
// collector.
Date_t now = start;
if (!firstLoop) {
now = client->getServiceContext()->getPreciseClockSource()->now();
}
firstLoop = false;
subObjBuilder.appendDate(kFTDCCollectStartField, now);
collector->collect(opCtx.get(), subObjBuilder);
end = client->getServiceContext()->getPreciseClockSource()->now();
subObjBuilder.appendDate(kFTDCCollectEndField, end);
}
builder.appendDate(kFTDCCollectEndField, end);
return std::tuple<BSONObj, Date_t>(builder.obj(), start);
}
} // namespace mongo
|
