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
|
/**
* 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::kTransaction
#include "mongo/platform/basic.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/db/commands.h"
#include "mongo/db/commands/txn_cmds_gen.h"
#include "mongo/db/op_observer.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/repl/repl_client_info.h"
#include "mongo/db/service_context.h"
#include "mongo/db/transaction_participant.h"
#include "mongo/util/log.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 {
IDLParserErrorContext ctx("commitTransaction");
auto cmd = CommitTransaction::parse(ctx, cmdObj);
auto txnParticipant = TransactionParticipant::get(opCtx);
uassert(ErrorCodes::CommandFailed,
"commitTransaction must be run within a transaction",
txnParticipant);
LOG(3) << "Participant shard received commitTransaction for transaction with txnNumber "
<< opCtx->getTxnNumber() << " on session " << opCtx->getLogicalSessionId()->toBSON();
// commitTransaction is retryable.
if (txnParticipant->transactionIsCommitted()) {
// We set the client last op to the last optime observed by the system to ensure that
// we wait for the specified write concern on an optime greater than or equal to the
// commit oplog entry.
auto& replClient = repl::ReplClientInfo::forClient(opCtx->getClient());
replClient.setLastOpToSystemLastOpTime(opCtx);
return true;
}
uassert(ErrorCodes::NoSuchTransaction,
"Transaction isn't in progress",
txnParticipant->inMultiDocumentTransaction());
auto optionalCommitTimestamp = cmd.getCommitTimestamp();
if (optionalCommitTimestamp) {
// commitPreparedTransaction will throw if the transaction is not prepared.
txnParticipant->commitPreparedTransaction(opCtx, optionalCommitTimestamp.get());
} else {
// commitUnpreparedTransaction will throw if the transaction is prepared.
txnParticipant->commitUnpreparedTransaction(opCtx);
}
return true;
}
} commitTxn;
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 txnParticipant = TransactionParticipant::get(opCtx);
uassert(ErrorCodes::CommandFailed,
"abortTransaction must be run within a transaction",
txnParticipant);
LOG(3) << "Participant shard received abortTransaction for transaction with txnNumber "
<< opCtx->getTxnNumber() << " on session " << opCtx->getLogicalSessionId()->toBSON();
uassert(ErrorCodes::NoSuchTransaction,
"Transaction isn't in progress",
txnParticipant->inMultiDocumentTransaction());
auto wasPrepared = txnParticipant->transactionIsPrepared();
try {
txnParticipant->abortActiveTransaction(opCtx);
} catch (...) {
// Make sure that abort succeeds if we are prepared. We check if we're prepared before
// aborting because the state may have changed while attempting to abort.
invariant(!wasPrepared,
str::stream() << "Caught exception during transaction "
<< opCtx->getTxnNumber()
<< " abort on "
<< opCtx->getLogicalSessionId()
<< ": "
<< exceptionToStatus());
throw;
}
return true;
}
} abortTxn;
} // namespace
} // namespace mongo
|
