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
|
/*
*
* 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.
*
*/
#include <qpid/client/FailoverManager.h>
#include <qpid/client/Session.h>
#include <qpid/client/Message.h>
#include <qpid/client/SubscriptionManager.h>
#include <qpid/client/SubscriptionSettings.h>
#include "TestOptions.h"
#include <iostream>
#include <fstream>
using namespace qpid;
using namespace qpid::client;
using namespace qpid::framing;
using namespace std;
namespace qpid {
namespace tests {
struct Args : public qpid::TestOptions
{
string queue;
uint messages;
bool ignoreDuplicates;
uint creditWindow;
uint ackFrequency;
bool browse;
Args() : queue("test-queue"), messages(0), ignoreDuplicates(false), creditWindow(0), ackFrequency(1), browse(false)
{
addOptions()
("queue", qpid::optValue(queue, "QUEUE NAME"), "Queue from which to request messages")
("messages", qpid::optValue(messages, "N"), "Number of messages to receive; 0 means receive indefinitely")
("ignore-duplicates", qpid::optValue(ignoreDuplicates), "Detect and ignore duplicates (by checking 'sn' header)")
("credit-window", qpid::optValue(creditWindow, "N"), "Credit window (0 implies infinite window)")
("ack-frequency", qpid::optValue(ackFrequency, "N"), "Ack frequency (0 implies none of the messages will get accepted)")
("browse", qpid::optValue(browse), "Browse rather than consuming");
}
};
const string EOS("eos");
const string SN("sn");
class Receiver : public MessageListener, public FailoverManager::Command
{
public:
Receiver(const string& queue, uint messages, bool ignoreDuplicates, uint creditWindow, uint ackFrequency, bool browse);
void received(Message& message);
void execute(AsyncSession& session, bool isRetry);
private:
const string queue;
const uint count;
const bool skipDups;
SubscriptionSettings settings;
Subscription subscription;
uint processed;
uint lastSn;
bool isDuplicate(Message& message);
};
Receiver::Receiver(const string& q, uint messages, bool ignoreDuplicates, uint creditWindow, uint ackFrequency, bool browse) :
queue(q), count(messages), skipDups(ignoreDuplicates), processed(0), lastSn(0)
{
if (browse) settings.acquireMode = ACQUIRE_MODE_NOT_ACQUIRED;
if (creditWindow) settings.flowControl = FlowControl::messageWindow(creditWindow);
settings.autoAck = ackFrequency;
}
void Receiver::received(Message& message)
{
if (!(skipDups && isDuplicate(message))) {
bool eos = message.getData() == EOS;
if (!eos) std::cout << message.getData() << std::endl;
if (eos || ++processed == count) subscription.cancel();
}
}
bool Receiver::isDuplicate(Message& message)
{
uint sn = message.getHeaders().getAsInt(SN);
if (lastSn < sn) {
lastSn = sn;
return false;
} else {
return true;
}
}
void Receiver::execute(AsyncSession& session, bool /*isRetry*/)
{
SubscriptionManager subs(session);
subscription = subs.subscribe(*this, queue, settings);
subs.run();
if (settings.autoAck) {
subscription.accept(subscription.getUnaccepted());
}
}
}} // namespace qpid::tests
using namespace qpid::tests;
int main(int argc, char ** argv)
{
Args opts;
try {
opts.parse(argc, argv);
FailoverManager connection(opts.con);
Receiver receiver(opts.queue, opts.messages, opts.ignoreDuplicates, opts.creditWindow, opts.ackFrequency, opts.browse);
connection.execute(receiver);
connection.close();
return 0;
} catch(const std::exception& error) {
std::cerr << "Failure: " << error.what() << std::endl;
}
return 1;
}
|
