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
|
// **********************************************************************
//
// Copyright (c) 2001
// MutableRealms, Inc.
// Huntsville, AL, USA
//
// All Rights Reserved
//
// **********************************************************************
#include <Ice/Application.h>
#include <IceStorm/IceStorm.h>
#include <ClockI.h>
using namespace std;
using namespace Ice;
class Subscriber : public Application
{
public:
virtual int run(int, char*[]);
};
int
main(int argc, char* argv[])
{
Subscriber app;
return app.main(argc, argv, "config");
}
int
Subscriber::run(int argc, char* argv[])
{
PropertiesPtr properties = communicator()->getProperties();
const char* endpointsProperty = "IceStorm.TopicManager.Endpoints";
std::string endpoints = properties->getProperty(endpointsProperty);
if (endpoints.empty())
{
cerr << appName() << ": property `" << endpointsProperty << "' not set" << endl;
return EXIT_FAILURE;
}
ObjectPrx base = communicator()->stringToProxy("TopicManager:" + endpoints);
IceStorm::TopicManagerPrx manager = IceStorm::TopicManagerPrx::checkedCast(base);
if (!manager)
{
cerr << appName() << ": invalid object reference" << endl;
return EXIT_FAILURE;
}
//
// Gather the set of topics to subscribe to. It is either the set
// provided on the command line, or the topic "time".
//
IceStorm::StringSeq topics;
if (argc > 1)
{
for (int i = 1; i < argc; ++i)
{
topics.push_back(argv[i]);
}
}
else
{
//
// The set of topics to which to subscribe
//
topics.push_back("time");
}
//
// Create the servant to receive the events. Then add the servant
// to the adapter for the given topics. Alternatively we could
// have used a ServantLocator for the same purpose. Note that any
// of the activated proxies will do since it the proxy is only a
// template from which the actual proxy is created by IceStorm.
//
ObjectAdapterPtr adapter = communicator()->createObjectAdapterWithEndpoints("ClockAdapter", "tcp");
ObjectPtr clock = new ClockI();
ObjectPrx object;
assert(!topics.empty());
Ice::Identity ident;
ident.category = "events";
for (IceStorm::StringSeq::iterator p = topics.begin(); p != topics.end(); ++p)
{
ident.name = *p;
object = adapter->add(clock, ident);
}
//
// The requested quality of service. This requests "reliability" =
// "batch". This asks IceStorm to send events to the subscriber in
// batches at regular intervals.
//
IceStorm::QoS qos;
qos["reliability"] = "batch";
try
{
manager->subscribe("events", qos, topics, object);
}
catch(const IceStorm::NoSuchTopic& e)
{
cerr << appName() << ": NoSuchTopic: " << e.name << endl;
return EXIT_FAILURE;
}
adapter->activate();
communicator()->waitForShutdown();
return EXIT_SUCCESS;
}
|
