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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/**
* Copyright (C) 2018 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kCommand
#include "mongo/platform/basic.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/db/commands.h"
#include "mongo/db/commands/test_commands_enabled.h"
#include "mongo/db/op_observer.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/service_context.h"
#include "mongo/db/session_catalog.h"
#include "mongo/util/fail_point_service.h"
namespace mongo {
namespace {
class CmdCommitTxn : public BasicCommand {
public:
CmdCommitTxn() : BasicCommand("commitTransaction") {}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
return AllowedOnSecondary::kAlways;
}
virtual bool adminOnly() const {
return true;
}
bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
std::string help() const override {
return "Commits a transaction";
}
Status checkAuthForOperation(OperationContext* opCtx,
const std::string& dbname,
const BSONObj& cmdObj) const override {
return Status::OK();
}
bool run(OperationContext* opCtx,
const std::string& dbname,
const BSONObj& cmdObj,
BSONObjBuilder& result) override {
auto session = OperationContextSession::get(opCtx);
uassert(
ErrorCodes::CommandFailed, "commitTransaction must be run within a session", session);
// TODO SERVER-33501 Change this when commitTransaction is retryable.
uassert(ErrorCodes::NoSuchTransaction,
"Transaction isn't in progress",
session->inMultiDocumentTransaction());
session->commitTransaction(opCtx);
return true;
}
} commitTxn;
MONGO_FP_DECLARE(pauseAfterTransactionPrepare);
// TODO: This is a stub for testing storage prepare functionality.
class CmdPrepareTxn : public BasicCommand {
public:
CmdPrepareTxn() : BasicCommand("prepareTransaction") {}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
return AllowedOnSecondary::kNever;
}
virtual bool adminOnly() const {
return true;
}
bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
std::string help() const override {
return "Preprares a transaction. THIS IS A STUB FOR TESTING.";
}
Status checkAuthForOperation(OperationContext* opCtx,
const std::string& dbname,
const BSONObj& cmdObj) const override {
return Status::OK();
}
bool run(OperationContext* opCtx,
const std::string& dbname,
const BSONObj& cmdObj,
BSONObjBuilder& result) override {
auto session = OperationContextSession::get(opCtx);
uassert(
ErrorCodes::CommandFailed, "prepareTransaction must be run within a session", session);
uassert(ErrorCodes::NoSuchTransaction,
"Transaction isn't in progress",
session->inMultiDocumentTransaction());
auto opObserver = opCtx->getServiceContext()->getOpObserver();
invariant(opObserver);
opObserver->onTransactionPrepare(opCtx);
// For testing purposes, this command prepares and immediately aborts the transaction,
// Running commit after prepare is not allowed yet.
// Prepared units of work cannot be released by the session, so we immediately abort here.
opCtx->getWriteUnitOfWork()->prepare();
// This failpoint will cause readers of prepared documents to return prepare conflicts.
MONGO_FAIL_POINT_PAUSE_WHILE_SET(pauseAfterTransactionPrepare);
session->abortActiveTransaction(opCtx);
return true;
}
};
MONGO_INITIALIZER(RegisterPrepareTxnCmd)(InitializerContext* context) {
if (getTestCommandsEnabled()) {
new CmdPrepareTxn();
}
return Status::OK();
}
class CmdAbortTxn : public BasicCommand {
public:
CmdAbortTxn() : BasicCommand("abortTransaction") {}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
return AllowedOnSecondary::kAlways;
}
virtual bool adminOnly() const {
return true;
}
bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
std::string help() const override {
return "Aborts a transaction";
}
Status checkAuthForOperation(OperationContext* opCtx,
const std::string& dbname,
const BSONObj& cmdObj) const override {
return Status::OK();
}
bool run(OperationContext* opCtx,
const std::string& dbname,
const BSONObj& cmdObj,
BSONObjBuilder& result) override {
auto session = OperationContextSession::get(opCtx);
uassert(
ErrorCodes::CommandFailed, "abortTransaction must be run within a session", session);
// TODO SERVER-33501 Change this when abortTransaction is retryable.
uassert(ErrorCodes::NoSuchTransaction,
"Transaction isn't in progress",
session->inMultiDocumentTransaction());
session->abortActiveTransaction(opCtx);
return true;
}
} abortTxn;
} // namespace
} // namespace mongo
|
