summaryrefslogtreecommitdiff
path: root/TAO/orbsvcs/examples/LoadBalancing/server.cpp
blob: 49c00ddf9f202dd2e18b996bcfac35993c852ac3 (plain)
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
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
#include "tao/ORBInitializer_Registry.h"
#include "StockFactory.h"
#include "ORBInitializer.h"
#include "RPS_Monitor.h"
#include "ace/OS_NS_stdlib.h"
#include "ace/OS_NS_strings.h"

#include "ace/Get_Opt.h"

const ACE_TCHAR *ior_output_file = ACE_TEXT("obj.ior");

CORBA::Float reject_threshold = 0;
CORBA::Float critical_threshold = 0;
CORBA::Float dampening = 0;
const ACE_TCHAR *strategy = ACE_TEXT("LeastLoaded");
int number;

int
parse_args (int argc, ACE_TCHAR *argv[])
{
  ACE_Get_Opt get_opts (argc, argv, ACE_TEXT("o:n:s:r:c:d:"));
  int c;

  while ((c = get_opts ()) != -1)
    switch (c)
      {
      case 'o':
        ior_output_file = get_opts.opt_arg ();
        break;

      case 's':
        strategy = get_opts.opt_arg ();
        break;

      case 'n':
        number = ACE_OS::atoi (get_opts.opt_arg ());
        break;

      case 'r':
        reject_threshold =
          static_cast<CORBA::Float> (ACE_OS::atof (get_opts.opt_arg ()));
        break;

      case 'c':
        critical_threshold =
          static_cast<CORBA::Float> (ACE_OS::atof (get_opts.opt_arg ()));
        break;

      case 'd':
        dampening =
          static_cast<CORBA::Float> (ACE_OS::atof (get_opts.opt_arg ()));
        break;

      case '?':
      default:
        ACE_ERROR_RETURN ((LM_ERROR,
                           "usage:  %s\n"
                           "  -o <iorfile>\n"
                           "  -s <RoundRobin | Random | LeastLoaded>\n"
                           "  -r <reject threshold>    (LeastLoaded only)\n"
                           "  -c <critical threshold>  (LeastLoaded only)\n"
                           "  -d <damping value>       (LeastLoaded only)\n"
                           "\n",
                           argv [0]),
                          -1);
      }
  // Indicates successful parsing of the command line
  return 0;
}

CORBA::Object_ptr
join_object_group (CORBA::ORB_ptr orb,
                   CosLoadBalancing::LoadManager_ptr lm,
                   const PortableGroup::Location & location)
{
  CORBA::Object_var ns_object =
    orb->resolve_initial_references ("NameService");

  CosNaming::NamingContext_var nc =
    CosNaming::NamingContext::_narrow (ns_object.in ());

  CosNaming::Name name (1);
  name.length (1);

  name[0].id = "StockFactoryObjectGroup";
  name[0].kind = "Object Group";

  CORBA::Object_var group;

  try
    {
      group = nc->resolve (name);
    }
  catch (const CosNaming::NamingContext::NotFound& )
    {
      // Object group not created.  Create one.
      const char repository_id[] = "IDL:Test/StockFactory:1.0";

      PortableGroup::Criteria criteria (1);
      criteria.length (1);

      PortableGroup::Property & property = criteria[0];
      property.nam.length (1);

      property.nam[0].id =
        CORBA::string_dup ("omg.org.PortableGroup.MembershipStyle");

      PortableGroup::MembershipStyleValue msv =
        PortableGroup::MEMB_APP_CTRL;
      property.val <<= msv;

      PortableGroup::GenericFactory::FactoryCreationId_var fcid;

      group = lm->create_object (repository_id,
                                 criteria,
                                 fcid.out ());

      try
        {
          nc->bind (name,
                    group.in ());

          PortableGroup::Properties props (1);
          props.length (1);
          props[0].nam.length (1);
          props[0].nam[0].id =
            CORBA::string_dup ("org.omg.CosLoadBalancing.StrategyInfo");

          CosLoadBalancing::StrategyInfo strategy_info;

          strategy_info.name = CORBA::string_dup (ACE_TEXT_ALWAYS_CHAR(strategy));

          if (ACE_OS::strcasecmp (strategy, ACE_TEXT("LeastLoaded")) == 0
              && (!ACE::is_equal (reject_threshold, 0.0f)
                  || !ACE::is_equal (critical_threshold, 0.0f)
                  || !ACE::is_equal (dampening, 0.0f)))
            {
              CORBA::ULong len = 1;

              PortableGroup::Properties & props =
                strategy_info.props;

              if (!ACE::is_equal (reject_threshold, 0.0f))
                {
                  const CORBA::ULong i = len - 1;

                  props.length (len++);

                  props[i].nam.length (1);
                  props[i].nam[0].id =
                    CORBA::string_dup ("org.omg.CosLoadBalancing.Strategy.LeastLoaded.RejectThreshold");
                  props[i].val <<= reject_threshold;
                }

              if (!ACE::is_equal (critical_threshold, 0.0f))
                {
                  const CORBA::ULong i = len - 1;

                  props.length (len++);

                  props[i].nam.length (1);
                  props[i].nam[0].id =
                    CORBA::string_dup ("org.omg.CosLoadBalancing.Strategy.LeastLoaded.CriticalThreshold");
                  props[i].val <<= critical_threshold;
                }

              if (!ACE::is_equal (dampening, 0.0f))
                {
                  const CORBA::ULong i = len - 1;

                  props.length (len++);

                  props[i].nam.length (1);
                  props[i].nam[0].id =
                    CORBA::string_dup ("org.omg.CosLoadBalancing.Strategy.LeastLoaded.Dampening");
                  props[i].val <<= dampening;
                }

            }

          props[0].val <<= strategy_info;

          lm->set_default_properties (props);
        }
      catch (const CosNaming::NamingContext::AlreadyBound& )
        {
          // Somebody beat us to creating the object group.  Clean up
          // the one we created.
          lm->delete_object (fcid.in ());

          group = nc->resolve (name);
        }
    }

  StockFactory * stockfactory_impl;
  ACE_NEW_THROW_EX (stockfactory_impl,
                    StockFactory (orb, number),
                    CORBA::NO_MEMORY ());

  PortableServer::ServantBase_var owner_transfer (stockfactory_impl);

  Test::StockFactory_var stockfactory =
    stockfactory_impl->_this ();

  group = lm->add_member (group.in (),
                          location,
                          stockfactory.in ());

  return group._retn ();
}

int
ACE_TMAIN(int argc, ACE_TCHAR *argv[])
{
  try
    {
      ORBInitializer *initializer = 0;
      ACE_NEW_RETURN (initializer,
                      ORBInitializer,
                      -1);  // No exceptions yet!
      PortableInterceptor::ORBInitializer_var orb_initializer =
        initializer;

      PortableInterceptor::register_orb_initializer (orb_initializer.in ());

      CORBA::ORB_var orb =
        CORBA::ORB_init (argc, argv);


      CORBA::Object_var poa_object =
        orb->resolve_initial_references ("RootPOA");

      if (CORBA::is_nil (poa_object.in ()))
        ACE_ERROR_RETURN ((LM_ERROR,
                           " (%P|%t) Unable to initialize the POA.\n"),
                          1);

      PortableServer::POA_var root_poa =
        PortableServer::POA::_narrow (poa_object.in ());

      PortableServer::POAManager_var poa_manager =
        root_poa->the_POAManager ();

      if (parse_args (argc, argv) != 0)
        return 1;

      poa_manager->activate ();

      CORBA::Object_var lm_object =
        orb->resolve_initial_references ("LoadManager");

      CosLoadBalancing::LoadManager_var load_manager =
        CosLoadBalancing::LoadManager::_narrow (lm_object.in ());

      RPS_Monitor * monitor_servant;
      ACE_NEW_THROW_EX (monitor_servant,
                        RPS_Monitor (initializer->interceptor ()),
                        CORBA::NO_MEMORY ());

      PortableServer::ServantBase_var safe_monitor_servant (monitor_servant);

      CosLoadBalancing::LoadMonitor_var load_monitor =
        monitor_servant->_this ();

      PortableGroup::Location_var location =
        load_monitor->the_location ();

      CORBA::Object_var stockfactory =
        ::join_object_group (orb.in (),
                             load_manager.in (),
                             location.in ());

      TAO_LB_LoadAlert & alert_servant = initializer->load_alert ();

      CosLoadBalancing::LoadAlert_var load_alert =
        alert_servant._this ();


      CORBA::String_var ior =
        orb->object_to_string (stockfactory.in ());

      // If the ior_output_file exists, output the ior to it
      FILE *output_file= ACE_OS::fopen (ior_output_file, "w");
      if (output_file == 0)
        ACE_ERROR_RETURN ((LM_ERROR,
                           "Cannot open output file for writing IOR: %s",
                           ior_output_file),
                          1);
      ACE_OS::fprintf (output_file, "%s", ior.in ());
      ACE_OS::fclose (output_file);

      load_manager->register_load_monitor (location.in (),
                                           load_monitor.in ());

      load_manager->register_load_alert (location.in (),
                                         load_alert.in ());

      orb->run ();

      ACE_DEBUG ((LM_DEBUG, "(%P|%t) server - event loop finished\n"));

      root_poa->destroy (1, 1);

      orb->destroy ();
    }
  catch (const CORBA::Exception& ex)
    {
      ex._tao_print_exception ("lb_server exception");
      return 1;
    }

  return 0;
}