dbus/test_service.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "dbus/test_service.h"
   6
   7 #include "base/bind.h"
   8 #include "base/test/test_timeouts.h"
   9 #include "base/threading/platform_thread.h"
  10 #include "dbus/bus.h"
  11 #include "dbus/exported_object.h"
  12 #include "dbus/message.h"
  13 #include "dbus/object_manager.h"
  14 #include "dbus/object_path.h"
  15 #include "dbus/property.h"
  16
  17 namespace {
  18
  19 void EmptyCallback(bool /* success */) {
  20 }
  21
  22 }  // namespace
  23
  24 namespace dbus {
  25
  26 // Echo, SlowEcho, AsyncEcho, BrokenMethod, GetAll, Get, Set, PerformAction,
  27 // GetManagedObjects.
  28 const int TestService::kNumMethodsToExport = 9;
  29
  30 TestService::Options::Options()
  31     : request_ownership_options(Bus::REQUIRE_PRIMARY) {
  32 }
  33
  34 TestService::Options::~Options() {
  35 }
  36
  37 TestService::TestService(const Options& options)
  38     : base::Thread("TestService"),
  39       request_ownership_options_(options.request_ownership_options),
  40       dbus_task_runner_(options.dbus_task_runner),
  41       on_name_obtained_(false, false),
  42       num_exported_methods_(0) {
  43 }
  44
  45 TestService::~TestService() {
  46   Stop();
  47 }
  48
  49 bool TestService::StartService() {
  50   base::Thread::Options thread_options;
  51   thread_options.message_loop_type = base::MessageLoop::TYPE_IO;
  52   return StartWithOptions(thread_options);
  53 }
  54
  55 bool TestService::WaitUntilServiceIsStarted() {
  56   const base::TimeDelta timeout(TestTimeouts::action_max_timeout());
  57   // Wait until the ownership of the service name is obtained.
  58   return on_name_obtained_.TimedWait(timeout);
  59 }
  60
  61 void TestService::ShutdownAndBlock() {
  62   message_loop()->PostTask(
  63       FROM_HERE,
  64       base::Bind(&TestService::ShutdownAndBlockInternal,
  65                  base::Unretained(this)));
  66 }
  67
  68 bool TestService::HasDBusThread() {
  69   return bus_->HasDBusThread();
  70 }
  71
  72 void TestService::ShutdownAndBlockInternal() {
  73   if (HasDBusThread())
  74     bus_->ShutdownOnDBusThreadAndBlock();
  75   else
  76     bus_->ShutdownAndBlock();
  77 }
  78
  79 void TestService::SendTestSignal(const std::string& message) {
  80   message_loop()->PostTask(
  81       FROM_HERE,
  82       base::Bind(&TestService::SendTestSignalInternal,
  83                  base::Unretained(this),
  84                  message));
  85 }
  86
  87 void TestService::SendTestSignalFromRoot(const std::string& message) {
  88   message_loop()->PostTask(
  89       FROM_HERE,
  90       base::Bind(&TestService::SendTestSignalFromRootInternal,
  91                  base::Unretained(this),
  92                  message));
  93 }
  94
  95 void TestService::SendTestSignalInternal(const std::string& message) {
  96   Signal signal("org.chromium.TestInterface", "Test");
  97   MessageWriter writer(&signal);
  98   writer.AppendString(message);
  99   exported_object_->SendSignal(&signal);
 100 }
 101
 102 void TestService::SendTestSignalFromRootInternal(const std::string& message) {
 103   Signal signal("org.chromium.TestInterface", "Test");
 104   MessageWriter writer(&signal);
 105   writer.AppendString(message);
 106
 107   bus_->RequestOwnership("org.chromium.TestService",
 108                          request_ownership_options_,
 109                          base::Bind(&TestService::OnOwnership,
 110                                     base::Unretained(this),
 111                                     base::Bind(&EmptyCallback)));
 112
 113   // Use "/" just like dbus-send does.
 114   ExportedObject* root_object = bus_->GetExportedObject(ObjectPath("/"));
 115   root_object->SendSignal(&signal);
 116 }
 117
 118 void TestService::RequestOwnership(base::Callback<void(bool)> callback) {
 119   message_loop()->PostTask(
 120       FROM_HERE,
 121       base::Bind(&TestService::RequestOwnershipInternal,
 122                  base::Unretained(this),
 123                  callback));
 124 }
 125
 126 void TestService::RequestOwnershipInternal(
 127     base::Callback<void(bool)> callback) {
 128   bus_->RequestOwnership("org.chromium.TestService",
 129                          request_ownership_options_,
 130                          base::Bind(&TestService::OnOwnership,
 131                                     base::Unretained(this),
 132                                     callback));
 133 }
 134
 135 void TestService::OnOwnership(base::Callback<void(bool)> callback,
 136                               const std::string& service_name,
 137                               bool success) {
 138   has_ownership_ = success;
 139   LOG_IF(ERROR, !success) << "Failed to own: " << service_name;
 140   callback.Run(success);
 141
 142   on_name_obtained_.Signal();
 143 }
 144
 145 void TestService::ReleaseOwnership(base::Closure callback) {
 146   bus_->GetDBusTaskRunner()->PostTask(
 147       FROM_HERE,
 148       base::Bind(&TestService::ReleaseOwnershipInternal,
 149                  base::Unretained(this),
 150                  callback));
 151 }
 152
 153 void TestService::ReleaseOwnershipInternal(
 154     base::Closure callback) {
 155   bus_->ReleaseOwnership("org.chromium.TestService");
 156   has_ownership_ = false;
 157
 158   bus_->GetOriginTaskRunner()->PostTask(
 159       FROM_HERE,
 160       callback);
 161 }
 162
 163 void TestService::OnExported(const std::string& interface_name,
 164                              const std::string& method_name,
 165                              bool success) {
 166   if (!success) {
 167     LOG(ERROR) << "Failed to export: " << interface_name << "."
 168                << method_name;
 169     // Returning here will make WaitUntilServiceIsStarted() to time out
 170     // and return false.
 171     return;
 172   }
 173
 174   ++num_exported_methods_;
 175   if (num_exported_methods_ == kNumMethodsToExport) {
 176     // As documented in exported_object.h, the service name should be
 177     // requested after all methods are exposed.
 178     bus_->RequestOwnership("org.chromium.TestService",
 179                            request_ownership_options_,
 180                            base::Bind(&TestService::OnOwnership,
 181                                       base::Unretained(this),
 182                                       base::Bind(&EmptyCallback)));
 183   }
 184 }
 185
 186 void TestService::Run(base::MessageLoop* message_loop) {
 187   Bus::Options bus_options;
 188   bus_options.bus_type = Bus::SESSION;
 189   bus_options.connection_type = Bus::PRIVATE;
 190   bus_options.dbus_task_runner = dbus_task_runner_;
 191   bus_ = new Bus(bus_options);
 192
 193   exported_object_ = bus_->GetExportedObject(
 194       ObjectPath("/org/chromium/TestObject"));
 195
 196   int num_methods = 0;
 197   exported_object_->ExportMethod(
 198       "org.chromium.TestInterface",
 199       "Echo",
 200       base::Bind(&TestService::Echo,
 201                  base::Unretained(this)),
 202       base::Bind(&TestService::OnExported,
 203                  base::Unretained(this)));
 204   ++num_methods;
 205
 206   exported_object_->ExportMethod(
 207       "org.chromium.TestInterface",
 208       "SlowEcho",
 209       base::Bind(&TestService::SlowEcho,
 210                  base::Unretained(this)),
 211       base::Bind(&TestService::OnExported,
 212                  base::Unretained(this)));
 213   ++num_methods;
 214
 215   exported_object_->ExportMethod(
 216       "org.chromium.TestInterface",
 217       "AsyncEcho",
 218       base::Bind(&TestService::AsyncEcho,
 219                  base::Unretained(this)),
 220       base::Bind(&TestService::OnExported,
 221                  base::Unretained(this)));
 222   ++num_methods;
 223
 224   exported_object_->ExportMethod(
 225       "org.chromium.TestInterface",
 226       "BrokenMethod",
 227       base::Bind(&TestService::BrokenMethod,
 228                  base::Unretained(this)),
 229       base::Bind(&TestService::OnExported,
 230                  base::Unretained(this)));
 231   ++num_methods;
 232
 233   exported_object_->ExportMethod(
 234       "org.chromium.TestInterface",
 235       "PerformAction",
 236       base::Bind(&TestService::PerformAction,
 237                  base::Unretained(this)),
 238       base::Bind(&TestService::OnExported,
 239                  base::Unretained(this)));
 240   ++num_methods;
 241
 242   exported_object_->ExportMethod(
 243        kPropertiesInterface,
 244        kPropertiesGetAll,
 245        base::Bind(&TestService::GetAllProperties,
 246                   base::Unretained(this)),
 247        base::Bind(&TestService::OnExported,
 248                   base::Unretained(this)));
 249   ++num_methods;
 250
 251   exported_object_->ExportMethod(
 252        kPropertiesInterface,
 253        kPropertiesGet,
 254        base::Bind(&TestService::GetProperty,
 255                   base::Unretained(this)),
 256        base::Bind(&TestService::OnExported,
 257                   base::Unretained(this)));
 258   ++num_methods;
 259
 260   exported_object_->ExportMethod(
 261        kPropertiesInterface,
 262        kPropertiesSet,
 263        base::Bind(&TestService::SetProperty,
 264                   base::Unretained(this)),
 265        base::Bind(&TestService::OnExported,
 266                   base::Unretained(this)));
 267   ++num_methods;
 268
 269   exported_object_manager_ = bus_->GetExportedObject(
 270       ObjectPath("/org/chromium/TestService"));
 271
 272   exported_object_manager_->ExportMethod(
 273        kObjectManagerInterface,
 274        kObjectManagerGetManagedObjects,
 275        base::Bind(&TestService::GetManagedObjects,
 276                   base::Unretained(this)),
 277        base::Bind(&TestService::OnExported,
 278                   base::Unretained(this)));
 279   ++num_methods;
 280
 281   // Just print an error message as we don't want to crash tests.
 282   // Tests will fail at a call to WaitUntilServiceIsStarted().
 283   if (num_methods != kNumMethodsToExport) {
 284     LOG(ERROR) << "The number of methods does not match";
 285   }
 286   message_loop->Run();
 287 }
 288
 289 void TestService::Echo(MethodCall* method_call,
 290                        ExportedObject::ResponseSender response_sender) {
 291   MessageReader reader(method_call);
 292   std::string text_message;
 293   if (!reader.PopString(&text_message)) {
 294     response_sender.Run(scoped_ptr<Response>());
 295     return;
 296   }
 297
 298   scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 299   MessageWriter writer(response.get());
 300   writer.AppendString(text_message);
 301   response_sender.Run(response.Pass());
 302 }
 303
 304 void TestService::SlowEcho(MethodCall* method_call,
 305                            ExportedObject::ResponseSender response_sender) {
 306   base::PlatformThread::Sleep(TestTimeouts::tiny_timeout());
 307   Echo(method_call, response_sender);
 308 }
 309
 310 void TestService::AsyncEcho(MethodCall* method_call,
 311                             ExportedObject::ResponseSender response_sender) {
 312   // Schedule a call to Echo() to send an asynchronous response after we return.
 313   message_loop()->PostDelayedTask(FROM_HERE,
 314                                   base::Bind(&TestService::Echo,
 315                                              base::Unretained(this),
 316                                              method_call,
 317                                              response_sender),
 318                                   TestTimeouts::tiny_timeout());
 319 }
 320
 321 void TestService::BrokenMethod(MethodCall* method_call,
 322                                ExportedObject::ResponseSender response_sender) {
 323   response_sender.Run(scoped_ptr<Response>());
 324 }
 325
 326
 327 void TestService::GetAllProperties(
 328     MethodCall* method_call,
 329     ExportedObject::ResponseSender response_sender) {
 330   MessageReader reader(method_call);
 331   std::string interface;
 332   if (!reader.PopString(&interface)) {
 333     response_sender.Run(scoped_ptr<Response>());
 334     return;
 335   }
 336
 337   scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 338   MessageWriter writer(response.get());
 339
 340   AddPropertiesToWriter(&writer);
 341
 342   response_sender.Run(response.Pass());
 343 }
 344
 345 void TestService::GetProperty(MethodCall* method_call,
 346                               ExportedObject::ResponseSender response_sender) {
 347   MessageReader reader(method_call);
 348   std::string interface;
 349   if (!reader.PopString(&interface)) {
 350     response_sender.Run(scoped_ptr<Response>());
 351     return;
 352   }
 353
 354   std::string name;
 355   if (!reader.PopString(&name)) {
 356     response_sender.Run(scoped_ptr<Response>());
 357     return;
 358   }
 359
 360   if (name == "Name") {
 361     // Return the previous value for the "Name" property:
 362     // Variant<"TestService">
 363     scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 364     MessageWriter writer(response.get());
 365
 366     writer.AppendVariantOfString("TestService");
 367
 368     response_sender.Run(response.Pass());
 369   } else if (name == "Version") {
 370     // Return a new value for the "Version" property:
 371     // Variant<20>
 372     scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 373     MessageWriter writer(response.get());
 374
 375     writer.AppendVariantOfInt16(20);
 376
 377     response_sender.Run(response.Pass());
 378   } else if (name == "Methods") {
 379     // Return the previous value for the "Methods" property:
 380     // Variant<["Echo", "SlowEcho", "AsyncEcho", "BrokenMethod"]>
 381     scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 382     MessageWriter writer(response.get());
 383     MessageWriter variant_writer(NULL);
 384     MessageWriter variant_array_writer(NULL);
 385
 386     writer.OpenVariant("as", &variant_writer);
 387     variant_writer.OpenArray("s", &variant_array_writer);
 388     variant_array_writer.AppendString("Echo");
 389     variant_array_writer.AppendString("SlowEcho");
 390     variant_array_writer.AppendString("AsyncEcho");
 391     variant_array_writer.AppendString("BrokenMethod");
 392     variant_writer.CloseContainer(&variant_array_writer);
 393     writer.CloseContainer(&variant_writer);
 394
 395     response_sender.Run(response.Pass());
 396   } else if (name == "Objects") {
 397     // Return the previous value for the "Objects" property:
 398     // Variant<[objectpath:"/TestObjectPath"]>
 399     scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 400     MessageWriter writer(response.get());
 401     MessageWriter variant_writer(NULL);
 402     MessageWriter variant_array_writer(NULL);
 403
 404     writer.OpenVariant("ao", &variant_writer);
 405     variant_writer.OpenArray("o", &variant_array_writer);
 406     variant_array_writer.AppendObjectPath(ObjectPath("/TestObjectPath"));
 407     variant_writer.CloseContainer(&variant_array_writer);
 408     writer.CloseContainer(&variant_writer);
 409
 410     response_sender.Run(response.Pass());
 411   } else if (name == "Bytes") {
 412     // Return the previous value for the "Bytes" property:
 413     // Variant<[0x54, 0x65, 0x73, 0x74]>
 414     scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 415     MessageWriter writer(response.get());
 416     MessageWriter variant_writer(NULL);
 417     MessageWriter variant_array_writer(NULL);
 418
 419     writer.OpenVariant("ay", &variant_writer);
 420     const uint8 bytes[] = { 0x54, 0x65, 0x73, 0x74 };
 421     variant_writer.AppendArrayOfBytes(bytes, sizeof(bytes));
 422     writer.CloseContainer(&variant_writer);
 423
 424     response_sender.Run(response.Pass());
 425   } else {
 426     // Return error.
 427     response_sender.Run(scoped_ptr<Response>());
 428     return;
 429   }
 430 }
 431
 432 void TestService::SetProperty(MethodCall* method_call,
 433                               ExportedObject::ResponseSender response_sender) {
 434   MessageReader reader(method_call);
 435   std::string interface;
 436   if (!reader.PopString(&interface)) {
 437     response_sender.Run(scoped_ptr<Response>());
 438     return;
 439   }
 440
 441   std::string name;
 442   if (!reader.PopString(&name)) {
 443     response_sender.Run(scoped_ptr<Response>());
 444     return;
 445   }
 446
 447   if (name != "Name") {
 448     response_sender.Run(scoped_ptr<Response>());
 449     return;
 450   }
 451
 452   std::string value;
 453   if (!reader.PopVariantOfString(&value)) {
 454     response_sender.Run(scoped_ptr<Response>());
 455     return;
 456   }
 457
 458   SendPropertyChangedSignal(value);
 459
 460   response_sender.Run(Response::FromMethodCall(method_call));
 461 }
 462
 463 void TestService::PerformAction(
 464       MethodCall* method_call,
 465       ExportedObject::ResponseSender response_sender) {
 466   MessageReader reader(method_call);
 467   std::string action;
 468   ObjectPath object_path;
 469   if (!reader.PopString(&action) || !reader.PopObjectPath(&object_path)) {
 470     response_sender.Run(scoped_ptr<Response>());
 471     return;
 472   }
 473
 474   if (action == "AddObject")
 475     AddObject(object_path);
 476   else if (action == "RemoveObject")
 477     RemoveObject(object_path);
 478   else if (action == "ReleaseOwnership") {
 479     ReleaseOwnership(base::Bind(&TestService::PerformActionResponse,
 480                                 base::Unretained(this),
 481                                 method_call, response_sender));
 482     return;
 483   } else if (action == "Ownership") {
 484     ReleaseOwnership(base::Bind(&TestService::OwnershipReleased,
 485                                 base::Unretained(this),
 486                                 method_call, response_sender));
 487     return;
 488   }
 489
 490   scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 491   response_sender.Run(response.Pass());
 492 }
 493
 494 void TestService::PerformActionResponse(
 495     MethodCall* method_call,
 496     ExportedObject::ResponseSender response_sender) {
 497   scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 498   response_sender.Run(response.Pass());
 499 }
 500
 501 void TestService::OwnershipReleased(
 502     MethodCall* method_call,
 503     ExportedObject::ResponseSender response_sender) {
 504   RequestOwnership(base::Bind(&TestService::OwnershipRegained,
 505                               base::Unretained(this),
 506                               method_call, response_sender));
 507 }
 508
 509
 510 void TestService::OwnershipRegained(
 511     MethodCall* method_call,
 512     ExportedObject::ResponseSender response_sender,
 513     bool success) {
 514   PerformActionResponse(method_call, response_sender);
 515 }
 516
 517
 518 void TestService::GetManagedObjects(
 519     MethodCall* method_call,
 520     ExportedObject::ResponseSender response_sender) {
 521   scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 522   MessageWriter writer(response.get());
 523
 524   // The managed objects response is a dictionary of object paths identifying
 525   // the object(s) with a dictionary of strings identifying the interface(s)
 526   // they implement and then a dictionary of property values.
 527   //
 528   // Thus this looks something like:
 529   //
 530   // {
 531   //   "/org/chromium/TestObject": {
 532   //     "org.chromium.TestInterface": { /* Properties */ }
 533   //   }
 534   // }
 535
 536
 537   MessageWriter array_writer(NULL);
 538   MessageWriter dict_entry_writer(NULL);
 539   MessageWriter object_array_writer(NULL);
 540   MessageWriter object_dict_entry_writer(NULL);
 541
 542   writer.OpenArray("{oa{sa{sv}}}", &array_writer);
 543
 544   array_writer.OpenDictEntry(&dict_entry_writer);
 545   dict_entry_writer.AppendObjectPath(ObjectPath("/org/chromium/TestObject"));
 546   dict_entry_writer.OpenArray("{sa{sv}}", &object_array_writer);
 547
 548   object_array_writer.OpenDictEntry(&object_dict_entry_writer);
 549   object_dict_entry_writer.AppendString("org.chromium.TestInterface");
 550   AddPropertiesToWriter(&object_dict_entry_writer);
 551   object_array_writer.CloseContainer(&object_dict_entry_writer);
 552
 553   dict_entry_writer.CloseContainer(&object_array_writer);
 554
 555   array_writer.CloseContainer(&dict_entry_writer);
 556   writer.CloseContainer(&array_writer);
 557
 558   response_sender.Run(response.Pass());
 559 }
 560
 561 void TestService::AddPropertiesToWriter(MessageWriter* writer) {
 562   // The properties response is a dictionary of strings identifying the
 563   // property and a variant containing the property value. We return all
 564   // of the properties, thus the response is:
 565   //
 566   // {
 567   //   "Name": Variant<"TestService">,
 568   //   "Version": Variant<10>,
 569   //   "Methods": Variant<["Echo", "SlowEcho", "AsyncEcho", "BrokenMethod"]>,
 570   //   "Objects": Variant<[objectpath:"/TestObjectPath"]>
 571   //   "Bytes": Variant<[0x54, 0x65, 0x73, 0x74]>
 572   // }
 573
 574   MessageWriter array_writer(NULL);
 575   MessageWriter dict_entry_writer(NULL);
 576   MessageWriter variant_writer(NULL);
 577   MessageWriter variant_array_writer(NULL);
 578
 579   writer->OpenArray("{sv}", &array_writer);
 580
 581   array_writer.OpenDictEntry(&dict_entry_writer);
 582   dict_entry_writer.AppendString("Name");
 583   dict_entry_writer.AppendVariantOfString("TestService");
 584   array_writer.CloseContainer(&dict_entry_writer);
 585
 586   array_writer.OpenDictEntry(&dict_entry_writer);
 587   dict_entry_writer.AppendString("Version");
 588   dict_entry_writer.AppendVariantOfInt16(10);
 589   array_writer.CloseContainer(&dict_entry_writer);
 590
 591   array_writer.OpenDictEntry(&dict_entry_writer);
 592   dict_entry_writer.AppendString("Methods");
 593   dict_entry_writer.OpenVariant("as", &variant_writer);
 594   variant_writer.OpenArray("s", &variant_array_writer);
 595   variant_array_writer.AppendString("Echo");
 596   variant_array_writer.AppendString("SlowEcho");
 597   variant_array_writer.AppendString("AsyncEcho");
 598   variant_array_writer.AppendString("BrokenMethod");
 599   variant_writer.CloseContainer(&variant_array_writer);
 600   dict_entry_writer.CloseContainer(&variant_writer);
 601   array_writer.CloseContainer(&dict_entry_writer);
 602
 603   array_writer.OpenDictEntry(&dict_entry_writer);
 604   dict_entry_writer.AppendString("Objects");
 605   dict_entry_writer.OpenVariant("ao", &variant_writer);
 606   variant_writer.OpenArray("o", &variant_array_writer);
 607   variant_array_writer.AppendObjectPath(ObjectPath("/TestObjectPath"));
 608   variant_writer.CloseContainer(&variant_array_writer);
 609   dict_entry_writer.CloseContainer(&variant_writer);
 610   array_writer.CloseContainer(&dict_entry_writer);
 611
 612   array_writer.OpenDictEntry(&dict_entry_writer);
 613   dict_entry_writer.AppendString("Bytes");
 614   dict_entry_writer.OpenVariant("ay", &variant_writer);
 615   const uint8 bytes[] = { 0x54, 0x65, 0x73, 0x74 };
 616   variant_writer.AppendArrayOfBytes(bytes, sizeof(bytes));
 617   dict_entry_writer.CloseContainer(&variant_writer);
 618   array_writer.CloseContainer(&dict_entry_writer);
 619
 620   writer->CloseContainer(&array_writer);
 621 }
 622
 623 void TestService::AddObject(const ObjectPath& object_path) {
 624   message_loop()->PostTask(
 625       FROM_HERE,
 626       base::Bind(&TestService::AddObjectInternal,
 627                  base::Unretained(this),
 628                  object_path));
 629 }
 630
 631 void TestService::AddObjectInternal(const ObjectPath& object_path) {
 632   Signal signal(kObjectManagerInterface, kObjectManagerInterfacesAdded);
 633   MessageWriter writer(&signal);
 634   writer.AppendObjectPath(object_path);
 635
 636   MessageWriter array_writer(NULL);
 637   MessageWriter dict_entry_writer(NULL);
 638
 639   writer.OpenArray("{sa{sv}}", &array_writer);
 640   array_writer.OpenDictEntry(&dict_entry_writer);
 641   dict_entry_writer.AppendString("org.chromium.TestInterface");
 642   AddPropertiesToWriter(&dict_entry_writer);
 643   array_writer.CloseContainer(&dict_entry_writer);
 644   writer.CloseContainer(&array_writer);
 645
 646   exported_object_manager_->SendSignal(&signal);
 647 }
 648
 649 void TestService::RemoveObject(const ObjectPath& object_path) {
 650   message_loop()->PostTask(FROM_HERE,
 651                            base::Bind(&TestService::RemoveObjectInternal,
 652                                       base::Unretained(this),
 653                                       object_path));
 654 }
 655
 656 void TestService::RemoveObjectInternal(const ObjectPath& object_path) {
 657   Signal signal(kObjectManagerInterface, kObjectManagerInterfacesRemoved);
 658   MessageWriter writer(&signal);
 659
 660   writer.AppendObjectPath(object_path);
 661
 662   std::vector<std::string> interfaces;
 663   interfaces.push_back("org.chromium.TestInterface");
 664   writer.AppendArrayOfStrings(interfaces);
 665
 666   exported_object_manager_->SendSignal(&signal);
 667 }
 668
 669 void TestService::SendPropertyChangedSignal(const std::string& name) {
 670   message_loop()->PostTask(
 671       FROM_HERE,
 672       base::Bind(&TestService::SendPropertyChangedSignalInternal,
 673                  base::Unretained(this),
 674                  name));
 675 }
 676
 677 void TestService::SendPropertyChangedSignalInternal(const std::string& name) {
 678   Signal signal(kPropertiesInterface, kPropertiesChanged);
 679   MessageWriter writer(&signal);
 680   writer.AppendString("org.chromium.TestInterface");
 681
 682   MessageWriter array_writer(NULL);
 683   MessageWriter dict_entry_writer(NULL);
 684
 685   writer.OpenArray("{sv}", &array_writer);
 686   array_writer.OpenDictEntry(&dict_entry_writer);
 687   dict_entry_writer.AppendString("Name");
 688   dict_entry_writer.AppendVariantOfString(name);
 689   array_writer.CloseContainer(&dict_entry_writer);
 690   writer.CloseContainer(&array_writer);
 691
 692   exported_object_->SendSignal(&signal);
 693 }
 694
 695 }  // namespace dbus