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::SetSendImmediatePropertiesChanged() {
 164   send_immediate_properties_changed_ = true;
 165 }
 166
 167 void TestService::OnExported(const std::string& interface_name,
 168                              const std::string& method_name,
 169                              bool success) {
 170   if (!success) {
 171     LOG(ERROR) << "Failed to export: " << interface_name << "."
 172                << method_name;
 173     // Returning here will make WaitUntilServiceIsStarted() to time out
 174     // and return false.
 175     return;
 176   }
 177
 178   ++num_exported_methods_;
 179   if (num_exported_methods_ == kNumMethodsToExport) {
 180     // As documented in exported_object.h, the service name should be
 181     // requested after all methods are exposed.
 182     bus_->RequestOwnership("org.chromium.TestService",
 183                            request_ownership_options_,
 184                            base::Bind(&TestService::OnOwnership,
 185                                       base::Unretained(this),
 186                                       base::Bind(&EmptyCallback)));
 187   }
 188 }
 189
 190 void TestService::Run(base::MessageLoop* message_loop) {
 191   Bus::Options bus_options;
 192   bus_options.bus_type = Bus::SESSION;
 193   bus_options.connection_type = Bus::PRIVATE;
 194   bus_options.dbus_task_runner = dbus_task_runner_;
 195   bus_ = new Bus(bus_options);
 196
 197   exported_object_ = bus_->GetExportedObject(
 198       ObjectPath("/org/chromium/TestObject"));
 199
 200   int num_methods = 0;
 201   exported_object_->ExportMethod(
 202       "org.chromium.TestInterface",
 203       "Echo",
 204       base::Bind(&TestService::Echo,
 205                  base::Unretained(this)),
 206       base::Bind(&TestService::OnExported,
 207                  base::Unretained(this)));
 208   ++num_methods;
 209
 210   exported_object_->ExportMethod(
 211       "org.chromium.TestInterface",
 212       "SlowEcho",
 213       base::Bind(&TestService::SlowEcho,
 214                  base::Unretained(this)),
 215       base::Bind(&TestService::OnExported,
 216                  base::Unretained(this)));
 217   ++num_methods;
 218
 219   exported_object_->ExportMethod(
 220       "org.chromium.TestInterface",
 221       "AsyncEcho",
 222       base::Bind(&TestService::AsyncEcho,
 223                  base::Unretained(this)),
 224       base::Bind(&TestService::OnExported,
 225                  base::Unretained(this)));
 226   ++num_methods;
 227
 228   exported_object_->ExportMethod(
 229       "org.chromium.TestInterface",
 230       "BrokenMethod",
 231       base::Bind(&TestService::BrokenMethod,
 232                  base::Unretained(this)),
 233       base::Bind(&TestService::OnExported,
 234                  base::Unretained(this)));
 235   ++num_methods;
 236
 237   exported_object_->ExportMethod(
 238       "org.chromium.TestInterface",
 239       "PerformAction",
 240       base::Bind(&TestService::PerformAction,
 241                  base::Unretained(this)),
 242       base::Bind(&TestService::OnExported,
 243                  base::Unretained(this)));
 244   ++num_methods;
 245
 246   exported_object_->ExportMethod(
 247        kPropertiesInterface,
 248        kPropertiesGetAll,
 249        base::Bind(&TestService::GetAllProperties,
 250                   base::Unretained(this)),
 251        base::Bind(&TestService::OnExported,
 252                   base::Unretained(this)));
 253   ++num_methods;
 254
 255   exported_object_->ExportMethod(
 256        kPropertiesInterface,
 257        kPropertiesGet,
 258        base::Bind(&TestService::GetProperty,
 259                   base::Unretained(this)),
 260        base::Bind(&TestService::OnExported,
 261                   base::Unretained(this)));
 262   ++num_methods;
 263
 264   exported_object_->ExportMethod(
 265        kPropertiesInterface,
 266        kPropertiesSet,
 267        base::Bind(&TestService::SetProperty,
 268                   base::Unretained(this)),
 269        base::Bind(&TestService::OnExported,
 270                   base::Unretained(this)));
 271   ++num_methods;
 272
 273   exported_object_manager_ = bus_->GetExportedObject(
 274       ObjectPath("/org/chromium/TestService"));
 275
 276   exported_object_manager_->ExportMethod(
 277        kObjectManagerInterface,
 278        kObjectManagerGetManagedObjects,
 279        base::Bind(&TestService::GetManagedObjects,
 280                   base::Unretained(this)),
 281        base::Bind(&TestService::OnExported,
 282                   base::Unretained(this)));
 283   ++num_methods;
 284
 285   // Just print an error message as we don't want to crash tests.
 286   // Tests will fail at a call to WaitUntilServiceIsStarted().
 287   if (num_methods != kNumMethodsToExport) {
 288     LOG(ERROR) << "The number of methods does not match";
 289   }
 290   message_loop->Run();
 291 }
 292
 293 void TestService::Echo(MethodCall* method_call,
 294                        ExportedObject::ResponseSender response_sender) {
 295   MessageReader reader(method_call);
 296   std::string text_message;
 297   if (!reader.PopString(&text_message)) {
 298     response_sender.Run(scoped_ptr<Response>());
 299     return;
 300   }
 301
 302   scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 303   MessageWriter writer(response.get());
 304   writer.AppendString(text_message);
 305   response_sender.Run(response.Pass());
 306 }
 307
 308 void TestService::SlowEcho(MethodCall* method_call,
 309                            ExportedObject::ResponseSender response_sender) {
 310   base::PlatformThread::Sleep(TestTimeouts::tiny_timeout());
 311   Echo(method_call, response_sender);
 312 }
 313
 314 void TestService::AsyncEcho(MethodCall* method_call,
 315                             ExportedObject::ResponseSender response_sender) {
 316   // Schedule a call to Echo() to send an asynchronous response after we return.
 317   message_loop()->PostDelayedTask(FROM_HERE,
 318                                   base::Bind(&TestService::Echo,
 319                                              base::Unretained(this),
 320                                              method_call,
 321                                              response_sender),
 322                                   TestTimeouts::tiny_timeout());
 323 }
 324
 325 void TestService::BrokenMethod(MethodCall* method_call,
 326                                ExportedObject::ResponseSender response_sender) {
 327   response_sender.Run(scoped_ptr<Response>());
 328 }
 329
 330
 331 void TestService::GetAllProperties(
 332     MethodCall* method_call,
 333     ExportedObject::ResponseSender response_sender) {
 334   MessageReader reader(method_call);
 335   std::string interface;
 336   if (!reader.PopString(&interface)) {
 337     response_sender.Run(scoped_ptr<Response>());
 338     return;
 339   }
 340
 341   scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 342   MessageWriter writer(response.get());
 343
 344   AddPropertiesToWriter(&writer);
 345
 346   response_sender.Run(response.Pass());
 347 }
 348
 349 void TestService::GetProperty(MethodCall* method_call,
 350                               ExportedObject::ResponseSender response_sender) {
 351   MessageReader reader(method_call);
 352   std::string interface;
 353   if (!reader.PopString(&interface)) {
 354     response_sender.Run(scoped_ptr<Response>());
 355     return;
 356   }
 357
 358   std::string name;
 359   if (!reader.PopString(&name)) {
 360     response_sender.Run(scoped_ptr<Response>());
 361     return;
 362   }
 363
 364   if (name == "Name") {
 365     // Return the previous value for the "Name" property:
 366     // Variant<"TestService">
 367     scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 368     MessageWriter writer(response.get());
 369
 370     writer.AppendVariantOfString("TestService");
 371
 372     response_sender.Run(response.Pass());
 373   } else if (name == "Version") {
 374     // Return a new value for the "Version" property:
 375     // Variant<20>
 376     scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 377     MessageWriter writer(response.get());
 378
 379     writer.AppendVariantOfInt16(20);
 380
 381     response_sender.Run(response.Pass());
 382   } else if (name == "Methods") {
 383     // Return the previous value for the "Methods" property:
 384     // Variant<["Echo", "SlowEcho", "AsyncEcho", "BrokenMethod"]>
 385     scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 386     MessageWriter writer(response.get());
 387     MessageWriter variant_writer(NULL);
 388     MessageWriter variant_array_writer(NULL);
 389
 390     writer.OpenVariant("as", &variant_writer);
 391     variant_writer.OpenArray("s", &variant_array_writer);
 392     variant_array_writer.AppendString("Echo");
 393     variant_array_writer.AppendString("SlowEcho");
 394     variant_array_writer.AppendString("AsyncEcho");
 395     variant_array_writer.AppendString("BrokenMethod");
 396     variant_writer.CloseContainer(&variant_array_writer);
 397     writer.CloseContainer(&variant_writer);
 398
 399     response_sender.Run(response.Pass());
 400   } else if (name == "Objects") {
 401     // Return the previous value for the "Objects" property:
 402     // Variant<[objectpath:"/TestObjectPath"]>
 403     scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 404     MessageWriter writer(response.get());
 405     MessageWriter variant_writer(NULL);
 406     MessageWriter variant_array_writer(NULL);
 407
 408     writer.OpenVariant("ao", &variant_writer);
 409     variant_writer.OpenArray("o", &variant_array_writer);
 410     variant_array_writer.AppendObjectPath(ObjectPath("/TestObjectPath"));
 411     variant_writer.CloseContainer(&variant_array_writer);
 412     writer.CloseContainer(&variant_writer);
 413
 414     response_sender.Run(response.Pass());
 415   } else if (name == "Bytes") {
 416     // Return the previous value for the "Bytes" property:
 417     // Variant<[0x54, 0x65, 0x73, 0x74]>
 418     scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 419     MessageWriter writer(response.get());
 420     MessageWriter variant_writer(NULL);
 421     MessageWriter variant_array_writer(NULL);
 422
 423     writer.OpenVariant("ay", &variant_writer);
 424     const uint8 bytes[] = { 0x54, 0x65, 0x73, 0x74 };
 425     variant_writer.AppendArrayOfBytes(bytes, sizeof(bytes));
 426     writer.CloseContainer(&variant_writer);
 427
 428     response_sender.Run(response.Pass());
 429   } else {
 430     // Return error.
 431     response_sender.Run(scoped_ptr<Response>());
 432     return;
 433   }
 434 }
 435
 436 void TestService::SetProperty(MethodCall* method_call,
 437                               ExportedObject::ResponseSender response_sender) {
 438   MessageReader reader(method_call);
 439   std::string interface;
 440   if (!reader.PopString(&interface)) {
 441     response_sender.Run(scoped_ptr<Response>());
 442     return;
 443   }
 444
 445   std::string name;
 446   if (!reader.PopString(&name)) {
 447     response_sender.Run(scoped_ptr<Response>());
 448     return;
 449   }
 450
 451   if (name != "Name") {
 452     response_sender.Run(scoped_ptr<Response>());
 453     return;
 454   }
 455
 456   std::string value;
 457   if (!reader.PopVariantOfString(&value)) {
 458     response_sender.Run(scoped_ptr<Response>());
 459     return;
 460   }
 461
 462   SendPropertyChangedSignal(value);
 463
 464   response_sender.Run(Response::FromMethodCall(method_call));
 465 }
 466
 467 void TestService::PerformAction(
 468       MethodCall* method_call,
 469       ExportedObject::ResponseSender response_sender) {
 470   MessageReader reader(method_call);
 471   std::string action;
 472   ObjectPath object_path;
 473   if (!reader.PopString(&action) || !reader.PopObjectPath(&object_path)) {
 474     response_sender.Run(scoped_ptr<Response>());
 475     return;
 476   }
 477
 478   if (action == "AddObject") {
 479     AddObject(object_path);
 480   } else if (action == "RemoveObject") {
 481     RemoveObject(object_path);
 482   } else if (action == "SetSendImmediatePropertiesChanged") {
 483     SetSendImmediatePropertiesChanged();
 484   } if (action == "ReleaseOwnership") {
 485     ReleaseOwnership(base::Bind(&TestService::PerformActionResponse,
 486                                 base::Unretained(this),
 487                                 method_call, response_sender));
 488     return;
 489   } else if (action == "Ownership") {
 490     ReleaseOwnership(base::Bind(&TestService::OwnershipReleased,
 491                                 base::Unretained(this),
 492                                 method_call, response_sender));
 493     return;
 494   }
 495
 496   scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 497   response_sender.Run(response.Pass());
 498 }
 499
 500 void TestService::PerformActionResponse(
 501     MethodCall* method_call,
 502     ExportedObject::ResponseSender response_sender) {
 503   scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 504   response_sender.Run(response.Pass());
 505 }
 506
 507 void TestService::OwnershipReleased(
 508     MethodCall* method_call,
 509     ExportedObject::ResponseSender response_sender) {
 510   RequestOwnership(base::Bind(&TestService::OwnershipRegained,
 511                               base::Unretained(this),
 512                               method_call, response_sender));
 513 }
 514
 515
 516 void TestService::OwnershipRegained(
 517     MethodCall* method_call,
 518     ExportedObject::ResponseSender response_sender,
 519     bool success) {
 520   PerformActionResponse(method_call, response_sender);
 521 }
 522
 523
 524 void TestService::GetManagedObjects(
 525     MethodCall* method_call,
 526     ExportedObject::ResponseSender response_sender) {
 527   scoped_ptr<Response> response = Response::FromMethodCall(method_call);
 528   MessageWriter writer(response.get());
 529
 530   // The managed objects response is a dictionary of object paths identifying
 531   // the object(s) with a dictionary of strings identifying the interface(s)
 532   // they implement and then a dictionary of property values.
 533   //
 534   // Thus this looks something like:
 535   //
 536   // {
 537   //   "/org/chromium/TestObject": {
 538   //     "org.chromium.TestInterface": { /* Properties */ }
 539   //   }
 540   // }
 541
 542
 543   MessageWriter array_writer(NULL);
 544   MessageWriter dict_entry_writer(NULL);
 545   MessageWriter object_array_writer(NULL);
 546   MessageWriter object_dict_entry_writer(NULL);
 547
 548   writer.OpenArray("{oa{sa{sv}}}", &array_writer);
 549
 550   array_writer.OpenDictEntry(&dict_entry_writer);
 551   dict_entry_writer.AppendObjectPath(ObjectPath("/org/chromium/TestObject"));
 552   dict_entry_writer.OpenArray("{sa{sv}}", &object_array_writer);
 553
 554   object_array_writer.OpenDictEntry(&object_dict_entry_writer);
 555   object_dict_entry_writer.AppendString("org.chromium.TestInterface");
 556   AddPropertiesToWriter(&object_dict_entry_writer);
 557   object_array_writer.CloseContainer(&object_dict_entry_writer);
 558
 559   dict_entry_writer.CloseContainer(&object_array_writer);
 560
 561   array_writer.CloseContainer(&dict_entry_writer);
 562   writer.CloseContainer(&array_writer);
 563
 564   response_sender.Run(response.Pass());
 565
 566   if (send_immediate_properties_changed_)
 567     SendPropertyChangedSignal("ChangedTestServiceName");
 568 }
 569
 570 void TestService::AddPropertiesToWriter(MessageWriter* writer) {
 571   // The properties response is a dictionary of strings identifying the
 572   // property and a variant containing the property value. We return all
 573   // of the properties, thus the response is:
 574   //
 575   // {
 576   //   "Name": Variant<"TestService">,
 577   //   "Version": Variant<10>,
 578   //   "Methods": Variant<["Echo", "SlowEcho", "AsyncEcho", "BrokenMethod"]>,
 579   //   "Objects": Variant<[objectpath:"/TestObjectPath"]>
 580   //   "Bytes": Variant<[0x54, 0x65, 0x73, 0x74]>
 581   // }
 582
 583   MessageWriter array_writer(NULL);
 584   MessageWriter dict_entry_writer(NULL);
 585   MessageWriter variant_writer(NULL);
 586   MessageWriter variant_array_writer(NULL);
 587
 588   writer->OpenArray("{sv}", &array_writer);
 589
 590   array_writer.OpenDictEntry(&dict_entry_writer);
 591   dict_entry_writer.AppendString("Name");
 592   dict_entry_writer.AppendVariantOfString("TestService");
 593   array_writer.CloseContainer(&dict_entry_writer);
 594
 595   array_writer.OpenDictEntry(&dict_entry_writer);
 596   dict_entry_writer.AppendString("Version");
 597   dict_entry_writer.AppendVariantOfInt16(10);
 598   array_writer.CloseContainer(&dict_entry_writer);
 599
 600   array_writer.OpenDictEntry(&dict_entry_writer);
 601   dict_entry_writer.AppendString("Methods");
 602   dict_entry_writer.OpenVariant("as", &variant_writer);
 603   variant_writer.OpenArray("s", &variant_array_writer);
 604   variant_array_writer.AppendString("Echo");
 605   variant_array_writer.AppendString("SlowEcho");
 606   variant_array_writer.AppendString("AsyncEcho");
 607   variant_array_writer.AppendString("BrokenMethod");
 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("Objects");
 614   dict_entry_writer.OpenVariant("ao", &variant_writer);
 615   variant_writer.OpenArray("o", &variant_array_writer);
 616   variant_array_writer.AppendObjectPath(ObjectPath("/TestObjectPath"));
 617   variant_writer.CloseContainer(&variant_array_writer);
 618   dict_entry_writer.CloseContainer(&variant_writer);
 619   array_writer.CloseContainer(&dict_entry_writer);
 620
 621   array_writer.OpenDictEntry(&dict_entry_writer);
 622   dict_entry_writer.AppendString("Bytes");
 623   dict_entry_writer.OpenVariant("ay", &variant_writer);
 624   const uint8 bytes[] = { 0x54, 0x65, 0x73, 0x74 };
 625   variant_writer.AppendArrayOfBytes(bytes, sizeof(bytes));
 626   dict_entry_writer.CloseContainer(&variant_writer);
 627   array_writer.CloseContainer(&dict_entry_writer);
 628
 629   writer->CloseContainer(&array_writer);
 630 }
 631
 632 void TestService::AddObject(const ObjectPath& object_path) {
 633   message_loop()->PostTask(
 634       FROM_HERE,
 635       base::Bind(&TestService::AddObjectInternal,
 636                  base::Unretained(this),
 637                  object_path));
 638 }
 639
 640 void TestService::AddObjectInternal(const ObjectPath& object_path) {
 641   Signal signal(kObjectManagerInterface, kObjectManagerInterfacesAdded);
 642   MessageWriter writer(&signal);
 643   writer.AppendObjectPath(object_path);
 644
 645   MessageWriter array_writer(NULL);
 646   MessageWriter dict_entry_writer(NULL);
 647
 648   writer.OpenArray("{sa{sv}}", &array_writer);
 649   array_writer.OpenDictEntry(&dict_entry_writer);
 650   dict_entry_writer.AppendString("org.chromium.TestInterface");
 651   AddPropertiesToWriter(&dict_entry_writer);
 652   array_writer.CloseContainer(&dict_entry_writer);
 653   writer.CloseContainer(&array_writer);
 654
 655   exported_object_manager_->SendSignal(&signal);
 656 }
 657
 658 void TestService::RemoveObject(const ObjectPath& object_path) {
 659   message_loop()->PostTask(FROM_HERE,
 660                            base::Bind(&TestService::RemoveObjectInternal,
 661                                       base::Unretained(this),
 662                                       object_path));
 663 }
 664
 665 void TestService::RemoveObjectInternal(const ObjectPath& object_path) {
 666   Signal signal(kObjectManagerInterface, kObjectManagerInterfacesRemoved);
 667   MessageWriter writer(&signal);
 668
 669   writer.AppendObjectPath(object_path);
 670
 671   std::vector<std::string> interfaces;
 672   interfaces.push_back("org.chromium.TestInterface");
 673   writer.AppendArrayOfStrings(interfaces);
 674
 675   exported_object_manager_->SendSignal(&signal);
 676 }
 677
 678 void TestService::SendPropertyChangedSignal(const std::string& name) {
 679   message_loop()->PostTask(
 680       FROM_HERE,
 681       base::Bind(&TestService::SendPropertyChangedSignalInternal,
 682                  base::Unretained(this),
 683                  name));
 684 }
 685
 686 void TestService::SendPropertyChangedSignalInternal(const std::string& name) {
 687   Signal signal(kPropertiesInterface, kPropertiesChanged);
 688   MessageWriter writer(&signal);
 689   writer.AppendString("org.chromium.TestInterface");
 690
 691   MessageWriter array_writer(NULL);
 692   MessageWriter dict_entry_writer(NULL);
 693
 694   writer.OpenArray("{sv}", &array_writer);
 695   array_writer.OpenDictEntry(&dict_entry_writer);
 696   dict_entry_writer.AppendString("Name");
 697   dict_entry_writer.AppendVariantOfString(name);
 698   array_writer.CloseContainer(&dict_entry_writer);
 699   writer.CloseContainer(&array_writer);
 700
 701   exported_object_->SendSignal(&signal);
 702 }
 703
 704 }  // namespace dbus