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
|
/**
* 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/curop.h"
#include "mongo/db/server_transactions_metrics.h"
#include "mongo/db/stats/single_transaction_stats.h"
#include "mongo/db/stats/top.h"
namespace mongo {
/**
* Updates transaction metrics (per-transaction metrics and server-wide transactions metrics) upon
* the appropriate transaction event.
*/
class TransactionMetricsObserver {
public:
/**
* Updates relevant metrics when a transaction begins.
*/
void onStart(ServerTransactionsMetrics* serverTransactionMetrics,
bool isAutoCommit,
TickSource* tickSource,
Date_t curWallClockTime,
Date_t expireDate);
/**
* Updates relevant metrics when a storage timestamp is chosen for a transaction.
*/
void onChooseReadTimestamp(Timestamp readTimestamp);
/**
* Updates relevant metrics when a transaction stashes its resources.
*/
void onStash(ServerTransactionsMetrics* serverTransactionMetrics, TickSource* tickSource);
/**
* Updates relevant metrics when a transaction unstashes its resources.
*/
void onUnstash(ServerTransactionsMetrics* serverTransactionsMetrics, TickSource* tickSource);
/**
* Updates relevant metrics when a transaction commits.
*/
void onCommit(OperationContext* opCtx,
ServerTransactionsMetrics* serverTransactionsMetrics,
TickSource* tickSource,
Top* top,
size_t operationCount,
size_t oplogOperationBytes);
/**
* Updates relevant metrics when a transaction aborts.
* See _onAbortActive() and _onAbortInactive().
*/
void onAbort(ServerTransactionsMetrics* serverTransactionsMetrics,
TickSource* tickSource,
Top* top);
/**
* Updates relevant metrics when a transcation is prepared.
*/
void onPrepare(ServerTransactionsMetrics* serverTransactionsMetrics, TickSource::Tick curTick);
/**
* Updates relevant metrics and storage statistics when an operation running on the transaction
* completes. An operation may be a read/write operation, or an abort/commit command.
*/
void onTransactionOperation(OperationContext* opCtx,
OpDebug::AdditiveMetrics additiveMetrics,
bool isPrepared);
/**
* Returns a read-only reference to the SingleTransactionStats object stored in this
* TransactionMetricsObserver instance.
*/
const SingleTransactionStats& getSingleTransactionStats() const {
return _singleTransactionStats;
}
/**
* Resets the SingleTransactionStats object stored in this TransactionMetricsObserver instance,
* preparing it for the new transaction or retryable write with the given number.
*/
void resetSingleTransactionStats(TxnNumberAndRetryCounter txnNumberAndRetryCounter) {
_singleTransactionStats = SingleTransactionStats(txnNumberAndRetryCounter);
}
private:
/**
* Updates relevant metrics for any generic transaction abort.
*/
void _onAbort(ServerTransactionsMetrics* serverTransactionsMetrics,
TickSource::Tick curTick,
TickSource* tickSource,
Top* top);
/**
* Updates relevant metrics when an active transaction aborts.
*/
void _onAbortActive(ServerTransactionsMetrics* serverTransactionsMetrics,
TickSource* tickSource,
Top* top);
/**
* Updates relevant metrics when an inactive transaction aborts.
*/
void _onAbortInactive(ServerTransactionsMetrics* serverTransactionsMetrics,
TickSource* tickSource,
Top* top);
// Tracks metrics for a single multi-document transaction.
SingleTransactionStats _singleTransactionStats;
};
} // namespace mongo
|
