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
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/**
* \file SimpleTransactionContext.cpp
*/
#include "SimpleTransactionContext.h"
#include "TransactionAsyncContext.h"
#include "qpid/asyncStore/AsyncStoreImpl.h"
#include <uuid/uuid.h>
namespace tests {
namespace storePerftools {
namespace asyncPerf {
SimpleTransactionContext::SimpleTransactionContext(const std::string& xid) :
qpid::broker::TransactionContext(),
m_xid(xid),
m_tpcFlag(!xid.empty()),
m_store(0),
m_txnHandle(0),
m_prepared(false),
m_enqueuedMsgs()
{
if (!m_tpcFlag) {
setLocalXid();
}
//std::cout << "*TXN* begin: xid=" << getXid() << "; 2PC=" << (is2pc()?"T":"F") << std::endl;
}
SimpleTransactionContext::SimpleTransactionContext(qpid::asyncStore::AsyncStoreImpl* store,
const std::string& xid) :
m_store(store),
m_prepared(false),
m_enqueuedMsgs()
{
//std::cout << "*TXN* begin: xid=" << getXid() << "; 2PC=" << (is2pc()?"T":"F") << std::endl;
if (m_store != 0) {
m_txnHandle = store->createTxnHandle(xid);
}
}
SimpleTransactionContext::~SimpleTransactionContext()
{}
// static
/*
void
SimpleTransactionContext::handleAsyncResult(const qpid::broker::AsyncResult* res,
qpid::broker::BrokerAsyncContext* bc)
{
if (bc && res) {
TransactionAsyncContext* tac = dynamic_cast<TransactionAsyncContext*>(bc);
if (res->errNo) {
// TODO: Handle async failure here
std::cerr << "Transaction xid=\"" << tac->getTransactionContext()->getXid() << "\": Operation " << tac->getOpStr() << ": failure "
<< res->errNo << " (" << res->errMsg << ")" << std::endl;
} else {
// Handle async success here
switch(tac->getOpCode()) {
case qpid::asyncStore::AsyncOperation::TXN_PREPARE:
tac->getTransactionContext()->prepareComplete(tac);
break;
case qpid::asyncStore::AsyncOperation::TXN_COMMIT:
tac->getTransactionContext()->commitComplete(tac);
break;
case qpid::asyncStore::AsyncOperation::TXN_ABORT:
tac->getTransactionContext()->abortComplete(tac);
break;
default:
std::ostringstream oss;
oss << "tests::storePerftools::asyncPerf::SimpleTransactionContext::handleAsyncResult(): Unknown async operation: " << tac->getOpCode();
throw qpid::Exception(oss.str());
};
}
}
if (bc) delete bc;
if (res) delete res;
}
*/
const qpid::broker::TxnHandle&
SimpleTransactionContext::getHandle() const
{
return m_txnHandle;
}
qpid::broker::TxnHandle&
SimpleTransactionContext::getHandle()
{
return m_txnHandle;
}
bool
SimpleTransactionContext::is2pc() const
{
return m_tpcFlag;
}
const std::string&
SimpleTransactionContext::getXid() const
{
return m_xid;
}
void
SimpleTransactionContext::addEnqueuedMsg(QueuedMessage* qm)
{
qpid::sys::ScopedLock<qpid::sys::Mutex> l(m_enqueuedMsgsMutex);
m_enqueuedMsgs.push_back(qm);
}
void
SimpleTransactionContext::prepare()
{
if (m_tpcFlag) {
localPrepare();
m_prepared = true;
}
std::ostringstream oss;
oss << "SimpleTransactionContext::prepare(): xid=\"" << getXid()
<< "\": Transaction Error: called prepare() on local transaction";
throw qpid::Exception(oss.str());
}
void
SimpleTransactionContext::abort()
{
// TODO: Check the following XA transaction semantics:
// Assuming 2PC aborts can occur without a prepare. Do local prepare if not already prepared.
if (!m_prepared) {
localPrepare();
}
if (m_store != 0) {
// m_store->submitAbort(m_txnHandle,
// &handleAsyncResult,
// dynamic_cast<qpid::broker::BrokerAsyncContext*>(new TransactionAsyncContext(this, qpid::asyncStore::AsyncOperation::TXN_ABORT)));
}
//std::cout << "*TXN* abort: xid=" << m_txnHandle.getXid() << "; 2PC=" << (m_txnHandle.is2pc()?"T":"F") << std::endl;
}
void
SimpleTransactionContext::commit()
{
if (is2pc()) {
if (!m_prepared) {
std::ostringstream oss;
oss << "SimpleTransactionContext::abort(): xid=\"" << getXid()
<< "\": Transaction Error: called commit() without prepare() on 2PC transaction";
throw qpid::Exception(oss.str());
}
} else {
localPrepare();
}
if (m_store != 0) {
// m_store->submitCommit(m_txnHandle,
// &handleAsyncResult,
// dynamic_cast<qpid::broker::BrokerAsyncContext*>(new TransactionAsyncContext(this, qpid::asyncStore::AsyncOperation::TXN_COMMIT)));
}
//std::cout << "*TXN* commit: xid=" << m_txnHandle.getXid() << "; 2PC=" << (m_txnHandle.is2pc()?"T":"F") << std::endl;
}
// private
void
SimpleTransactionContext::localPrepare()
{
if (m_store != 0) {
// m_store->submitPrepare(m_txnHandle,
// &handleAsyncResult,
// dynamic_cast<qpid::broker::BrokerAsyncContext*>(new TransactionAsyncContext(this, qpid::asyncStore::AsyncOperation::TXN_PREPARE)));
}
//std::cout << "*TXN* localPrepare: xid=" << m_txnHandle.getXid() << "; 2PC=" << (m_txnHandle.is2pc()?"T":"F") << std::endl;
}
// private
void
SimpleTransactionContext::setLocalXid()
{
uuid_t uuid;
// TODO: Valgrind warning: Possible race condition in uuid_generate_random() - is it thread-safe, and if not, does it matter?
// If this race condition affects the randomness of the UUID, then there could be a problem here.
::uuid_generate_random(uuid);
char uuidStr[37]; // 36-char uuid + trailing '\0'
::uuid_unparse(uuid, uuidStr);
m_xid.assign(uuidStr);
}
// private
void
SimpleTransactionContext::prepareComplete(const TransactionAsyncContext* /*tc*/)
{
qpid::sys::ScopedLock<qpid::sys::Mutex> l(m_enqueuedMsgsMutex);
// while (!m_enqueuedMsgs.empty()) {
// m_enqueuedMsgs.front()->clearTransaction();
// m_enqueuedMsgs.pop_front();
// }
//std::cout << "~~~~~ Transaction xid=\"" << tc->m_tc->getXid() << "\": prepareComplete()" << std::endl << std::flush;
// assert(tc->getTransactionContext().get() == this);
}
// private
void
SimpleTransactionContext::abortComplete(const TransactionAsyncContext* tc)
{
//std::cout << "~~~~~ Transaction xid=\"" << tc->m_tc->getXid() << "\": abortComplete()" << std::endl << std::flush;
assert(tc->getTransactionContext().get() == this);
}
// private
void
SimpleTransactionContext::commitComplete(const TransactionAsyncContext* tc)
{
//std::cout << "~~~~~ Transaction xid=\"" << tc->m_tc->getXid() << "\": commitComplete()" << std::endl << std::flush;
assert(tc->getTransactionContext().get() == this);
}
}}} // namespace tests::storePerftools::asyncPerf
|
