summaryrefslogtreecommitdiff
path: root/ace/Service_Config.cpp
blob: 38faf6456e09b9e0714dfbaea5a01c7659475fb6 (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
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
// $Id$

#define ACE_BUILD_DLL
#include "ace/Svc_Conf.h"
#include "ace/Get_Opt.h"
#include "ace/ARGV.h"
#include "ace/Malloc.h"
#include "ace/Service_Manager.h"
#include "ace/Service_Repository.h"
#include "ace/Service_Types.h"
#include "ace/Containers.h"
#include "ace/Auto_Ptr.h"
#include "ace/Proactor.h"
#include "ace/Reactor.h"
#include "ace/Thread_Manager.h"

#include "ace/Service_Config.h"

#if !defined (__ACE_INLINE__)
#include "ace/Service_Config.i"
#endif /* __ACE_INLINE__ */

ACE_ALLOC_HOOK_DEFINE(ACE_Service_Config)

void
ACE_Service_Config::dump (void) const
{
  ACE_TRACE ("ACE_Service_Config::dump");
}

// All the factory functions that allocate default statically linked
// services should be placed below.

// Allocate a Service Manager.

ACE_SVC_FACTORY_DEFINE (ACE_Service_Manager)

// ----------------------------------------

// Set the signal handler to point to the handle_signal() function.
ACE_Sig_Adapter *ACE_Service_Config::signal_handler_ = 0;

// Trigger a reconfiguration.
sig_atomic_t ACE_Service_Config::reconfig_occurred_ = 0;

  // = Set by command-line options.
char ACE_Service_Config::debug_ = 0;
char ACE_Service_Config::be_a_daemon_ = 0;
char ACE_Service_Config::no_static_svcs_ = 0;

// Number of the signal used to trigger reconfiguration.
int ACE_Service_Config::signum_ = SIGHUP;

// Name of file used to store messages.
LPCTSTR ACE_Service_Config::logger_key_ = ACE_DEFAULT_LOGGER_KEY;

// Name of the service configuration file.
const ASYS_TCHAR *ACE_Service_Config::service_config_file_ = ASYS_TEXT (ACE_DEFAULT_SVC_CONF);

// The ACE_Service_Manager static service object is now defined
// by the ACE_Object_Manager, in Object_Manager.cpp.

// List of statically configured services.

ACE_STATIC_SVCS *ACE_Service_Config::static_svcs_ = 0;

ACE_STATIC_SVCS *
ACE_Service_Config::static_svcs (void)
{
  if (ACE_Service_Config::static_svcs_ == 0)
    ACE_NEW_RETURN (ACE_Service_Config::static_svcs_, ACE_STATIC_SVCS, 0);

  return ACE_Service_Config::static_svcs_;
}

ACE_Allocator *
ACE_Service_Config::alloc (void)
{
  ACE_TRACE ("ACE_Service_Config::allocator");
  return ACE_Allocator::instance ();
}

ACE_Allocator *
ACE_Service_Config::alloc (ACE_Allocator *r)
{
  ACE_TRACE ("ACE_Service_Config::allocator");
  return ACE_Allocator::instance (r);
}

ACE_Reactor *
ACE_Service_Config::reactor (void)
{
  ACE_TRACE ("ACE_Service_Config::reactor");
  return ACE_Reactor::instance ();
}

ACE_Reactor *
ACE_Service_Config::reactor (ACE_Reactor *r)
{
  ACE_TRACE ("ACE_Service_Config::reactor");
  return ACE_Reactor::instance (r);
}

ACE_Service_Repository *
ACE_Service_Config::svc_rep ()
{
  ACE_TRACE ("ACE_Service_Config::svc_rep");
  return ACE_Service_Repository::instance ();
}

ACE_Service_Repository *
ACE_Service_Config::svc_rep (ACE_Service_Repository *s)
{
  ACE_TRACE ("ACE_Service_Config::svc_rep");
  return ACE_Service_Repository::instance (s);
}

ACE_Thread_Manager *
ACE_Service_Config::thr_mgr (void)
{
  ACE_TRACE ("ACE_Service_Config::thr_mgr");
  return ACE_Thread_Manager::instance ();
}

ACE_Thread_Manager *
ACE_Service_Config::thr_mgr (ACE_Thread_Manager *tm)
{
  ACE_TRACE ("ACE_Service_Config::thr_mgr");
  return ACE_Thread_Manager::instance (tm);
}

// Totally remove <svc_name> from the daemon by removing it from the
// ACE_Reactor, and unlinking it if necessary.

int
ACE_Service_Config::remove (const ASYS_TCHAR svc_name[])
{
  ACE_TRACE ("ACE_Service_Config::remove");
  return ACE_Service_Repository::instance ()->remove (svc_name);
}

// Suspend SVC_NAME.  Note that this will not unlink the service from
// the daemon if it was dynamically linked, it will mark it as being
// suspended in the Service Repository and call the suspend() member
// function on the appropriate ACE_Service_Object.  A service can be
// resumed later on by calling the RESUME() member function...

int
ACE_Service_Config::suspend (const ASYS_TCHAR svc_name[])
{
  ACE_TRACE ("ACE_Service_Config::suspend");
  return ACE_Service_Repository::instance ()->suspend (svc_name);
}

// Resume a SVC_NAME that was previously suspended or has not yet
// been resumed (e.g., a static service).

int
ACE_Service_Config::resume (const ASYS_TCHAR svc_name[])
{
  ACE_TRACE ("ACE_Service_Config::resume");
  return ACE_Service_Repository::instance ()->resume (svc_name);
}

// Initialize the Service Repository.  Note that this *must* be
// performed in the constructor (rather than open()) since otherwise
// the repository will not be properly initialized to allow static
// configuration of services...

ACE_Service_Config::ACE_Service_Config (int ignore_static_svcs,
                                        size_t size,
                                        int signum)
{
  ACE_TRACE ("ACE_Service_Config::ACE_Service_Config");
  ACE_Service_Config::no_static_svcs_ = (char) ignore_static_svcs;
  ACE_Service_Config::signum_ = signum;

  // Initialize the Service Repository.
  ACE_Service_Repository::instance (size);

  // Initialize the ACE_Reactor (the ACE_Reactor should be the same
  // size as the ACE_Service_Repository).
  ACE_Reactor::instance ();

  // There's no point in dealing with this on NT since it doesn't really
  // support signals very well...
#if !defined (ACE_LACKS_UNIX_SIGNALS)
  // This really ought to be a Singleton I suspect...

  if (ACE_Reactor::instance ()->register_handler (ACE_Service_Config::signum_,
                                                  ACE_Service_Config::signal_handler_) == -1)
    ACE_ERROR ((LM_ERROR, ASYS_TEXT ("can't register signal handler\n")));
#endif /* ACE_LACKS_UNIX_SIGNALS */
}

// Handle the command-line options intended for the
// ACE_Service_Config.

void
ACE_Service_Config::parse_args (int argc, ASYS_TCHAR *argv[])
{
  ACE_TRACE ("ACE_Service_Config::parse_args");
  ACE_Get_Opt getopt (argc, argv, ASYS_TEXT ("bdf:k:ns:"), 1); // Start at argv[1]

  for (int c; (c = getopt ()) != -1; )
    switch (c)
      {
      case 'b':
        ACE_Service_Config::be_a_daemon_ = 1;
        break;
      case 'd':
        ACE_Service_Config::debug_ = 1;
        break;
      case 'f':
        ACE_Service_Config::service_config_file_ = getopt.optarg;
        break;
      case 'k':
        ACE_Service_Config::logger_key_ = ACE_WIDE_STRING (getopt.optarg);
        break;
      case 'n':
        ACE_Service_Config::no_static_svcs_ = 1;
        break;
      case 's':
        {
          // There's no point in dealing with this on NT since it doesn't really
          // support signals very well...
#if !defined (ACE_LACKS_UNIX_SIGNALS)
          ACE_Service_Config::signum_ = ACE_OS::atoi (getopt.optarg);

          if (ACE_Reactor::instance ()->register_handler
              (ACE_Service_Config::signum_,
               ACE_Service_Config::signal_handler_) == -1)
            ACE_ERROR ((LM_ERROR, ASYS_TEXT ("cannot obtain signal handler\n")));
#endif /* ACE_LACKS_UNIX_SIGNALS */
          break;
        }
      default:
        ACE_ERROR ((LM_ERROR, ASYS_TEXT ("%c is not a ACE_Service_Config option\n"), c));
        break;
      }
}

// Initialize and activate a statically linked service.

int
ACE_Service_Config::initialize (const ASYS_TCHAR svc_name[],
                                ASYS_TCHAR *parameters)
{
  ACE_TRACE ("ACE_Service_Config::initialize");
  ACE_ARGV args (parameters);
  ACE_Service_Type  *srp = 0;

  ACE_DEBUG ((LM_DEBUG,  ASYS_TEXT ("opening static service %s\n"), svc_name));

  if (ACE_Service_Repository::instance ()->find (svc_name,
                                                 (const ACE_Service_Type **) &srp) == -1)
    ACE_ERROR_RETURN ((LM_ERROR, ASYS_TEXT ("%s not found\n"), svc_name), -1);

  else if (srp->type ()->init (args.argc (), args.argv ()) == -1)
    ACE_ERROR_RETURN ((LM_ERROR, ASYS_TEXT ("static initialization failed, %p\n"),
                       svc_name), -1);
  else
    {
      srp->active (1);
      return 0;
    }
}

// Dynamically link the shared object file and retrieve a pointer to
// the designated shared object in this file.

int
ACE_Service_Config::initialize (const ACE_Service_Type *sr,
                                ASYS_TCHAR parameters[])
{
  ACE_TRACE ("ACE_Service_Config::initialize");
  ACE_ARGV args (parameters);

  ACE_DEBUG ((LM_DEBUG,  ASYS_TEXT ("opening dynamic service %s\n"), sr->name ()));

  if (ACE_Service_Repository::instance ()->insert (sr) == -1)
    ACE_ERROR_RETURN ((LM_ERROR, ASYS_TEXT ("insertion failed, %p\n"), sr->name ()), -1);

  else if (sr->type ()->init (args.argc (), args.argv ()) == -1)
    ACE_ERROR_RETURN ((LM_ERROR, ASYS_TEXT ("dynamic initialization failed for %s\n"),
                      sr->name ()), -1);
  else
    return 0;
}

// Process service configuration requests as indicated in the
// <service_config_file>.

int
ACE_Service_Config::process_directives (void)
{
  ACE_TRACE ("ACE_Service_Config::process_directives");

  FILE *fp = ACE_OS::fopen (ACE_Service_Config::service_config_file_, ASYS_TEXT ("r"));

  if (fp == 0)
    {
      errno = ENOENT;
      return -1; // No service configuration file
    }
  else
    {
      // AC 970827 Skip the heap check because yacc allocates a buffer
      // here which will be reported as a memory leak for some reason.
      ACE_NO_HEAP_CHECK

      ace_yyrestart (fp);

      ace_yyerrno = 0;
      ace_yylineno = 1;

      // Use an auto_ptr to make sure that we release this memory
      // regardless of how we exit...
      ACE_NEW_RETURN (ace_obstack, ACE_Obstack, -1);

      auto_ptr<ACE_Obstack> holder (ace_obstack);

      ace_yyparse ();

      if (ace_yyerrno > 0)
        {
          errno = EINVAL; // This is a hack, better errors should be provided...
          return ace_yyerrno;
        }
      else
        return 0;
    }
}

// Add the default statically-linked services to the Service
// Repository.

int
ACE_Service_Config::load_static_svcs (void)
{
  ACE_TRACE ("ACE_Service_Config::load_static_svcs");

  ACE_Static_Svc_Descriptor **ssdp = 0;
  ACE_STATIC_SVCS &svcs = *ACE_Service_Config::static_svcs ();

  for (ACE_STATIC_SVCS_ITERATOR iter (svcs);
       iter.next (ssdp) != 0;
       iter.advance ())
    {
      ACE_Static_Svc_Descriptor *ssd = *ssdp;

      ACE_Service_Type_Impl *stp =
        ace_create_service_type (ssd->name_,
                                 ssd->type_,
                                 (*ssd->alloc_)(),
                                 ssd->flags_);
      if (stp == 0)
        continue;

      ACE_Service_Type *sr;

      ACE_NEW_RETURN (sr, ACE_Service_Type (ssd->name_, stp,
                                              0, ssd->active_), -1);

      if (ACE_Service_Repository::instance ()->insert (sr) == -1)
        return -1;
    }
  return 0;
}

// Performs an open without parsing command-line arguments.

int
ACE_Service_Config::open (const ASYS_TCHAR program_name[],
                          LPCTSTR logger_key)
{
  ACE_TRACE ("ACE_Service_Config::open");

  // Become a daemon before doing anything else.
  if (ACE_Service_Config::be_a_daemon_)
    ACE_Service_Config::start_daemon ();

  u_long flags = ACE_LOG_MSG->flags ();

  if (flags == 0)
    // Only use STDERR if the caller hasn't already set the flags.
    flags = (u_long) ACE_Log_Msg::STDERR;

  LPCTSTR key = logger_key;
  
  if (key == 0 || ACE_OS::strcmp (key, ACE_DEFAULT_LOGGER_KEY))
    // Only use the static <logger_key_> if the caller doesn't
    // override it in the parameter list.
    key = ACE_Service_Config::logger_key_;

  if (ACE_LOG_MSG->open (program_name,
                         flags,
                         key) == -1)
    return -1;
  else
    {
      ACE_DEBUG ((LM_STARTUP, ASYS_TEXT ("starting up daemon %n\n")));

      // Initialize the Service Repository (this will still work if
      // user forgets to define an object of type ACE_Service_Config).
      ACE_Service_Repository::instance (ACE_Service_Config::MAX_SERVICES);

      // Initialize the ACE_Reactor (the ACE_Reactor should be the
      // same size as the ACE_Service_Repository).
      ACE_Reactor::instance ();

      // Register ourselves to receive reconfiguration requests via
      // signals!

      if (ACE_Service_Config::no_static_svcs_ == 0
          && ACE_Service_Config::load_static_svcs () == -1)
        return -1;
      else
        return ACE_Service_Config::process_directives ();
    }
}

ACE_Service_Config::ACE_Service_Config (const ASYS_TCHAR program_name[],
                                        LPCTSTR logger_key)
{
  ACE_TRACE ("ACE_Service_Config::ACE_Service_Config");

  if (this->open (program_name, logger_key) == -1
      && errno != ENOENT)
    // Only print out an error if it wasn't the svc.conf file that was
    // missing.
    ACE_ERROR ((LM_ERROR, ASYS_TEXT ("%p\n"), program_name));
}

// Signal handling API to trigger dynamic reconfiguration.

void
ACE_Service_Config::handle_signal (int sig, siginfo_t *, ucontext_t *)
{
  ACE_TRACE ("ACE_Service_Config::handle_signal");

  if (ACE_Service_Config::signum_ != sig)
    ACE_ERROR ((LM_ERROR,
                ASYS_TEXT ("error, signal %S does match %S\n"),
                sig, ACE_Service_Config::signum_));

  if (ACE_Service_Config::debug_)
    ACE_DEBUG ((LM_DEBUG,  ASYS_TEXT ("signal %S occurred\n"), sig));

  ACE_Service_Config::reconfig_occurred_ = 1;
}

// Trigger the reconfiguration process.

void
ACE_Service_Config::reconfigure (void)
{
  ACE_TRACE ("ACE_Service_Config::reconfigure");

  ACE_Service_Config::reconfig_occurred_ = 0;

  if (ACE_Service_Config::debug_)
    {
      time_t t = ACE_OS::time (0);
      ACE_DEBUG ((LM_DEBUG,  ASYS_TEXT ("beginning reconfiguration at %s"), ACE_OS::ctime (&t)));
    }

  if (ACE_Service_Config::process_directives () == -1)
    ACE_ERROR ((LM_ERROR,  ASYS_TEXT ("%p\n"),  ASYS_TEXT ("process_directives")));
}

// Run the event loop until the <ACE_Reactor::handle_events>
// method returns -1 or the <end_reactor_event_loop> method
// is invoked.

int
ACE_Service_Config::run_reactor_event_loop (void)
{
  ACE_TRACE ("ACE_Service_Config::run_reactor_event_loop");

  return ACE_Reactor::run_event_loop ();
}

// Run the event loop until the <ACE_Reactor::handle_events>
// method returns -1, the <end_reactor_event_loop> method
// is invoked, or the <ACE_Time_Value> expires.

int
ACE_Service_Config::run_reactor_event_loop (ACE_Time_Value &tv)
{
  ACE_TRACE ("ACE_Service_Config::run_reactor_event_loop");

  return ACE_Reactor::run_event_loop (tv);
}

/* static */
int
ACE_Service_Config::end_reactor_event_loop (void)
{
  ACE_TRACE ("ACE_Service_Config::end_reactor_event_loop");
  return ACE_Reactor::end_event_loop ();
}

/* static */
int
ACE_Service_Config::reactor_event_loop_done (void)
{
  ACE_TRACE ("ACE_Service_Config::reactor_event_loop_done");
  return ACE_Reactor::event_loop_done ();
}

// Tidy up and perform last rites on a terminating ACE_Service_Config.
int
ACE_Service_Config::close (void)
{
  ACE_TRACE ("ACE_Service_Config::close");

  // ACE_Service_Config must be deleted before the Singletons are
  // closed so that an object's fini() method may reference a
  // valid ACE_Reactor.
  ACE_Service_Config::close_svcs ();

  // The Singletons can be used independently of the services.
  // Therefore, this call must go out here.
  ACE_Service_Config::close_singletons ();

  // Delete the dynamically allocated static_svcs instance.
  delete ACE_Service_Config::static_svcs_;
  ACE_Service_Config::static_svcs_ = 0;

  return 0;
}

int
ACE_Service_Config::close_svcs (void)
{
  ACE_TRACE ("ACE_Service_Config::close_svcs");

  ACE_Service_Repository::close_singleton ();

  return 0;
}

int
ACE_Service_Config::close_singletons (void)
{
  ACE_TRACE ("ACE_Service_Config::close_singletons");

  ACE_Reactor::close_singleton ();
  ACE_Proactor::close_singleton ();
  ACE_Thread_Manager::close_singleton ();

  return 0;
}

// Perform user-specified close activities and remove dynamic memory.


ACE_Service_Config::~ACE_Service_Config (void)
{
  ACE_TRACE ("ACE_Service_Config::~ACE_Service_Config");
  ACE_Service_Config::close ();
}

// ************************************************************

/* static */
int
ACE_Service_Config::reconfig_occurred (void)
{
  ACE_TRACE ("ACE_Service_Config::reconfig_occurred");
  return ACE_Service_Config::reconfig_occurred_ != 0;
}

void
ACE_Service_Config::reconfig_occurred (int config_occurred)
{
  ACE_TRACE ("ACE_Service_Config::reconfig_occurred");
  ACE_Service_Config::reconfig_occurred_ = config_occurred;
}

// Become a daemon (i.e., run as a ASYS_TEXT ("background") process).

int
ACE_Service_Config::start_daemon (void)
{
  ACE_TRACE ("ACE_Service_Config::start_daemon");
  return ACE::daemonize ();
}

#if defined (ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION)
template class ACE_Node<ACE_Static_Svc_Descriptor *>;
template class ACE_Unbounded_Set<ACE_Static_Svc_Descriptor *>;
template class ACE_Unbounded_Set_Iterator<ACE_Static_Svc_Descriptor *>;
template class ACE_Malloc<ACE_LOCAL_MEMORY_POOL, ACE_Null_Mutex>;
template class ACE_Allocator_Adapter<ACE_Malloc<ACE_LOCAL_MEMORY_POOL, ACE_Null_Mutex> >;
template class auto_ptr<ACE_Obstack>;
template class ACE_Auto_Basic_Ptr<ACE_Obstack>;
#elif defined (ACE_HAS_TEMPLATE_INSTANTIATION_PRAGMA)
#pragma instantiate ACE_Node<ACE_Static_Svc_Descriptor *>
#pragma instantiate ACE_Unbounded_Set<ACE_Static_Svc_Descriptor *>
#pragma instantiate ACE_Unbounded_Set_Iterator<ACE_Static_Svc_Descriptor *>
#pragma instantiate ACE_Malloc<ACE_LOCAL_MEMORY_POOL, ACE_Null_Mutex>
#pragma instantiate ACE_Allocator_Adapter<ACE_Malloc<ACE_LOCAL_MEMORY_POOL, ACE_Null_Mutex> >
#pragma instantiate auto_ptr<ACE_Obstack>
#pragma instantiate ACE_Auto_Basic_Ptr<ACE_Obstack>
#endif /* ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION */