sync/internal_api/sync_manager_impl.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 "sync/internal_api/sync_manager_impl.h"
   6
   7 #include <string>
   8
   9 #include "base/base64.h"
  10 #include "base/bind.h"
  11 #include "base/callback.h"
  12 #include "base/compiler_specific.h"
  13 #include "base/json/json_writer.h"
  14 #include "base/memory/ref_counted.h"
  15 #include "base/metrics/histogram.h"
  16 #include "base/observer_list.h"
  17 #include "base/strings/string_number_conversions.h"
  18 #include "base/values.h"
  19 #include "sync/engine/sync_scheduler.h"
  20 #include "sync/engine/syncer_types.h"
  21 #include "sync/internal_api/change_reorder_buffer.h"
  22 #include "sync/internal_api/public/base/cancelation_signal.h"
  23 #include "sync/internal_api/public/base/model_type.h"
  24 #include "sync/internal_api/public/base_node.h"
  25 #include "sync/internal_api/public/configure_reason.h"
  26 #include "sync/internal_api/public/engine/polling_constants.h"
  27 #include "sync/internal_api/public/http_post_provider_factory.h"
  28 #include "sync/internal_api/public/internal_components_factory.h"
  29 #include "sync/internal_api/public/read_node.h"
  30 #include "sync/internal_api/public/read_transaction.h"
  31 #include "sync/internal_api/public/user_share.h"
  32 #include "sync/internal_api/public/util/experiments.h"
  33 #include "sync/internal_api/public/write_node.h"
  34 #include "sync/internal_api/public/write_transaction.h"
  35 #include "sync/internal_api/syncapi_internal.h"
  36 #include "sync/internal_api/syncapi_server_connection_manager.h"
  37 #include "sync/js/js_arg_list.h"
  38 #include "sync/js/js_event_details.h"
  39 #include "sync/js/js_event_handler.h"
  40 #include "sync/js/js_reply_handler.h"
  41 #include "sync/notifier/invalidation_util.h"
  42 #include "sync/notifier/invalidator.h"
  43 #include "sync/notifier/object_id_invalidation_map.h"
  44 #include "sync/protocol/proto_value_conversions.h"
  45 #include "sync/protocol/sync.pb.h"
  46 #include "sync/syncable/directory.h"
  47 #include "sync/syncable/entry.h"
  48 #include "sync/syncable/in_memory_directory_backing_store.h"
  49 #include "sync/syncable/on_disk_directory_backing_store.h"
  50
  51 using base::TimeDelta;
  52 using sync_pb::GetUpdatesCallerInfo;
  53
  54 namespace syncer {
  55
  56 using sessions::SyncSessionContext;
  57 using syncable::ImmutableWriteTransactionInfo;
  58 using syncable::SPECIFICS;
  59 using syncable::UNIQUE_POSITION;
  60
  61 namespace {
  62
  63 // Delays for syncer nudges.
  64 static const int kDefaultNudgeDelayMilliseconds = 200;
  65 static const int kPreferencesNudgeDelayMilliseconds = 2000;
  66 static const int kSyncRefreshDelayMsec = 500;
  67 static const int kSyncSchedulerDelayMsec = 250;
  68
  69 // Maximum count and size for traffic recorder.
  70 static const unsigned int kMaxMessagesToRecord = 10;
  71 static const unsigned int kMaxMessageSizeToRecord = 5 * 1024;
  72
  73 GetUpdatesCallerInfo::GetUpdatesSource GetSourceFromReason(
  74     ConfigureReason reason) {
  75   switch (reason) {
  76     case CONFIGURE_REASON_RECONFIGURATION:
  77       return GetUpdatesCallerInfo::RECONFIGURATION;
  78     case CONFIGURE_REASON_MIGRATION:
  79       return GetUpdatesCallerInfo::MIGRATION;
  80     case CONFIGURE_REASON_NEW_CLIENT:
  81       return GetUpdatesCallerInfo::NEW_CLIENT;
  82     case CONFIGURE_REASON_NEWLY_ENABLED_DATA_TYPE:
  83     case CONFIGURE_REASON_CRYPTO:
  84       return GetUpdatesCallerInfo::NEWLY_SUPPORTED_DATATYPE;
  85     default:
  86       NOTREACHED();
  87   }
  88   return GetUpdatesCallerInfo::UNKNOWN;
  89 }
  90
  91 }  // namespace
  92
  93 // A class to calculate nudge delays for types.
  94 class NudgeStrategy {
  95  public:
  96   static TimeDelta GetNudgeDelayTimeDelta(const ModelType& model_type,
  97                                           SyncManagerImpl* core) {
  98     NudgeDelayStrategy delay_type = GetNudgeDelayStrategy(model_type);
  99     return GetNudgeDelayTimeDeltaFromType(delay_type,
 100                                           model_type,
 101                                           core);
 102   }
 103
 104  private:
 105   // Possible types of nudge delay for datatypes.
 106   // Note: These are just hints. If a sync happens then all dirty entries
 107   // would be committed as part of the sync.
 108   enum NudgeDelayStrategy {
 109     // Sync right away.
 110     IMMEDIATE,
 111
 112     // Sync this change while syncing another change.
 113     ACCOMPANY_ONLY,
 114
 115     // The datatype does not use one of the predefined wait times but defines
 116     // its own wait time logic for nudge.
 117     CUSTOM,
 118   };
 119
 120   static NudgeDelayStrategy GetNudgeDelayStrategy(const ModelType& type) {
 121     switch (type) {
 122      case AUTOFILL:
 123        return ACCOMPANY_ONLY;
 124      case PREFERENCES:
 125      case SESSIONS:
 126      case FAVICON_IMAGES:
 127      case FAVICON_TRACKING:
 128        return CUSTOM;
 129      default:
 130        return IMMEDIATE;
 131     }
 132   }
 133
 134   static TimeDelta GetNudgeDelayTimeDeltaFromType(
 135       const NudgeDelayStrategy& delay_type, const ModelType& model_type,
 136       const SyncManagerImpl* core) {
 137     CHECK(core);
 138     TimeDelta delay = TimeDelta::FromMilliseconds(
 139        kDefaultNudgeDelayMilliseconds);
 140     switch (delay_type) {
 141      case IMMEDIATE:
 142        delay = TimeDelta::FromMilliseconds(
 143            kDefaultNudgeDelayMilliseconds);
 144        break;
 145      case ACCOMPANY_ONLY:
 146        delay = TimeDelta::FromSeconds(kDefaultShortPollIntervalSeconds);
 147        break;
 148      case CUSTOM:
 149        switch (model_type) {
 150          case PREFERENCES:
 151            delay = TimeDelta::FromMilliseconds(
 152                kPreferencesNudgeDelayMilliseconds);
 153            break;
 154          case SESSIONS:
 155          case FAVICON_IMAGES:
 156          case FAVICON_TRACKING:
 157            delay = core->scheduler()->GetSessionsCommitDelay();
 158            break;
 159          default:
 160            NOTREACHED();
 161        }
 162        break;
 163      default:
 164        NOTREACHED();
 165     }
 166     return delay;
 167   }
 168 };
 169
 170 SyncManagerImpl::SyncManagerImpl(const std::string& name)
 171     : name_(name),
 172       change_delegate_(NULL),
 173       initialized_(false),
 174       observing_network_connectivity_changes_(false),
 175       invalidator_state_(DEFAULT_INVALIDATION_ERROR),
 176       traffic_recorder_(kMaxMessagesToRecord, kMaxMessageSizeToRecord),
 177       encryptor_(NULL),
 178       report_unrecoverable_error_function_(NULL),
 179       weak_ptr_factory_(this) {
 180   // Pre-fill |notification_info_map_|.
 181   for (int i = FIRST_REAL_MODEL_TYPE; i < MODEL_TYPE_COUNT; ++i) {
 182     notification_info_map_.insert(
 183         std::make_pair(ModelTypeFromInt(i), NotificationInfo()));
 184   }
 185
 186   // Bind message handlers.
 187   BindJsMessageHandler(
 188       "getNotificationState",
 189       &SyncManagerImpl::GetNotificationState);
 190   BindJsMessageHandler(
 191       "getNotificationInfo",
 192       &SyncManagerImpl::GetNotificationInfo);
 193   BindJsMessageHandler(
 194       "getAllNodes",
 195       &SyncManagerImpl::GetAllNodes);
 196   BindJsMessageHandler(
 197       "getClientServerTraffic",
 198       &SyncManagerImpl::GetClientServerTraffic);
 199 }
 200
 201 SyncManagerImpl::~SyncManagerImpl() {
 202   DCHECK(thread_checker_.CalledOnValidThread());
 203   CHECK(!initialized_);
 204 }
 205
 206 SyncManagerImpl::NotificationInfo::NotificationInfo() : total_count(0) {}
 207 SyncManagerImpl::NotificationInfo::~NotificationInfo() {}
 208
 209 base::DictionaryValue* SyncManagerImpl::NotificationInfo::ToValue() const {
 210   base::DictionaryValue* value = new base::DictionaryValue();
 211   value->SetInteger("totalCount", total_count);
 212   value->SetString("payload", payload);
 213   return value;
 214 }
 215
 216 bool SyncManagerImpl::VisiblePositionsDiffer(
 217     const syncable::EntryKernelMutation& mutation) const {
 218   const syncable::EntryKernel& a = mutation.original;
 219   const syncable::EntryKernel& b = mutation.mutated;
 220   if (!b.ShouldMaintainPosition())
 221     return false;
 222   if (!a.ref(UNIQUE_POSITION).Equals(b.ref(UNIQUE_POSITION)))
 223     return true;
 224   if (a.ref(syncable::PARENT_ID) != b.ref(syncable::PARENT_ID))
 225     return true;
 226   return false;
 227 }
 228
 229 bool SyncManagerImpl::VisiblePropertiesDiffer(
 230     const syncable::EntryKernelMutation& mutation,
 231     Cryptographer* cryptographer) const {
 232   const syncable::EntryKernel& a = mutation.original;
 233   const syncable::EntryKernel& b = mutation.mutated;
 234   const sync_pb::EntitySpecifics& a_specifics = a.ref(SPECIFICS);
 235   const sync_pb::EntitySpecifics& b_specifics = b.ref(SPECIFICS);
 236   DCHECK_EQ(GetModelTypeFromSpecifics(a_specifics),
 237             GetModelTypeFromSpecifics(b_specifics));
 238   ModelType model_type = GetModelTypeFromSpecifics(b_specifics);
 239   // Suppress updates to items that aren't tracked by any browser model.
 240   if (model_type < FIRST_REAL_MODEL_TYPE ||
 241       !a.ref(syncable::UNIQUE_SERVER_TAG).empty()) {
 242     return false;
 243   }
 244   if (a.ref(syncable::IS_DIR) != b.ref(syncable::IS_DIR))
 245     return true;
 246   if (!AreSpecificsEqual(cryptographer,
 247                          a.ref(syncable::SPECIFICS),
 248                          b.ref(syncable::SPECIFICS))) {
 249     return true;
 250   }
 251   // We only care if the name has changed if neither specifics is encrypted
 252   // (encrypted nodes blow away the NON_UNIQUE_NAME).
 253   if (!a_specifics.has_encrypted() && !b_specifics.has_encrypted() &&
 254       a.ref(syncable::NON_UNIQUE_NAME) != b.ref(syncable::NON_UNIQUE_NAME))
 255     return true;
 256   if (VisiblePositionsDiffer(mutation))
 257     return true;
 258   return false;
 259 }
 260
 261 void SyncManagerImpl::ThrowUnrecoverableError() {
 262   DCHECK(thread_checker_.CalledOnValidThread());
 263   ReadTransaction trans(FROM_HERE, GetUserShare());
 264   trans.GetWrappedTrans()->OnUnrecoverableError(
 265       FROM_HERE, "Simulating unrecoverable error for testing purposes.");
 266 }
 267
 268 ModelTypeSet SyncManagerImpl::InitialSyncEndedTypes() {
 269   return directory()->InitialSyncEndedTypes();
 270 }
 271
 272 ModelTypeSet SyncManagerImpl::GetTypesWithEmptyProgressMarkerToken(
 273     ModelTypeSet types) {
 274   ModelTypeSet result;
 275   for (ModelTypeSet::Iterator i = types.First(); i.Good(); i.Inc()) {
 276     sync_pb::DataTypeProgressMarker marker;
 277     directory()->GetDownloadProgress(i.Get(), &marker);
 278
 279     if (marker.token().empty())
 280       result.Put(i.Get());
 281   }
 282   return result;
 283 }
 284
 285 void SyncManagerImpl::ConfigureSyncer(
 286     ConfigureReason reason,
 287     ModelTypeSet to_download,
 288     ModelTypeSet to_purge,
 289     ModelTypeSet to_journal,
 290     ModelTypeSet to_unapply,
 291     const ModelSafeRoutingInfo& new_routing_info,
 292     const base::Closure& ready_task,
 293     const base::Closure& retry_task) {
 294   DCHECK(thread_checker_.CalledOnValidThread());
 295   DCHECK(!ready_task.is_null());
 296   DCHECK(!retry_task.is_null());
 297
 298   DVLOG(1) << "Configuring -"
 299            << "\n\t" << "current types: "
 300            << ModelTypeSetToString(GetRoutingInfoTypes(new_routing_info))
 301            << "\n\t" << "types to download: "
 302            << ModelTypeSetToString(to_download)
 303            << "\n\t" << "types to purge: "
 304            << ModelTypeSetToString(to_purge)
 305            << "\n\t" << "types to journal: "
 306            << ModelTypeSetToString(to_journal)
 307            << "\n\t" << "types to unapply: "
 308            << ModelTypeSetToString(to_unapply);
 309   if (!PurgeDisabledTypes(to_purge,
 310                           to_journal,
 311                           to_unapply)) {
 312     // We failed to cleanup the types. Invoke the ready task without actually
 313     // configuring any types. The caller should detect this as a configuration
 314     // failure and act appropriately.
 315     ready_task.Run();
 316     return;
 317   }
 318
 319   ConfigurationParams params(GetSourceFromReason(reason),
 320                              to_download,
 321                              new_routing_info,
 322                              ready_task,
 323                              retry_task);
 324
 325   scheduler_->Start(SyncScheduler::CONFIGURATION_MODE);
 326   scheduler_->ScheduleConfiguration(params);
 327 }
 328
 329 void SyncManagerImpl::Init(
 330     const base::FilePath& database_location,
 331     const WeakHandle<JsEventHandler>& event_handler,
 332     const std::string& sync_server_and_path,
 333     int port,
 334     bool use_ssl,
 335     scoped_ptr<HttpPostProviderFactory> post_factory,
 336     const std::vector<scoped_refptr<ModelSafeWorker> >& workers,
 337     ExtensionsActivity* extensions_activity,
 338     SyncManager::ChangeDelegate* change_delegate,
 339     const SyncCredentials& credentials,
 340     const std::string& invalidator_client_id,
 341     const std::string& restored_key_for_bootstrapping,
 342     const std::string& restored_keystore_key_for_bootstrapping,
 343     InternalComponentsFactory* internal_components_factory,
 344     Encryptor* encryptor,
 345     scoped_ptr<UnrecoverableErrorHandler> unrecoverable_error_handler,
 346     ReportUnrecoverableErrorFunction report_unrecoverable_error_function,
 347     CancelationSignal* cancelation_signal) {
 348   CHECK(!initialized_);
 349   DCHECK(thread_checker_.CalledOnValidThread());
 350   DCHECK(post_factory.get());
 351   DCHECK(!credentials.email.empty());
 352   DCHECK(!credentials.sync_token.empty());
 353   DCHECK(cancelation_signal);
 354   DVLOG(1) << "SyncManager starting Init...";
 355
 356   weak_handle_this_ = MakeWeakHandle(weak_ptr_factory_.GetWeakPtr());
 357
 358   change_delegate_ = change_delegate;
 359
 360   AddObserver(&js_sync_manager_observer_);
 361   SetJsEventHandler(event_handler);
 362
 363   AddObserver(&debug_info_event_listener_);
 364
 365   database_path_ = database_location.Append(
 366       syncable::Directory::kSyncDatabaseFilename);
 367   encryptor_ = encryptor;
 368   unrecoverable_error_handler_ = unrecoverable_error_handler.Pass();
 369   report_unrecoverable_error_function_ = report_unrecoverable_error_function;
 370
 371   allstatus_.SetHasKeystoreKey(
 372       !restored_keystore_key_for_bootstrapping.empty());
 373   sync_encryption_handler_.reset(new SyncEncryptionHandlerImpl(
 374       &share_,
 375       encryptor,
 376       restored_key_for_bootstrapping,
 377       restored_keystore_key_for_bootstrapping));
 378   sync_encryption_handler_->AddObserver(this);
 379   sync_encryption_handler_->AddObserver(&debug_info_event_listener_);
 380   sync_encryption_handler_->AddObserver(&js_sync_encryption_handler_observer_);
 381
 382   base::FilePath absolute_db_path = database_path_;
 383   DCHECK(absolute_db_path.IsAbsolute());
 384
 385   scoped_ptr<syncable::DirectoryBackingStore> backing_store =
 386       internal_components_factory->BuildDirectoryBackingStore(
 387           credentials.email, absolute_db_path).Pass();
 388
 389   DCHECK(backing_store.get());
 390   const std::string& username = credentials.email;
 391   share_.directory.reset(
 392       new syncable::Directory(
 393           backing_store.release(),
 394           unrecoverable_error_handler_.get(),
 395           report_unrecoverable_error_function_,
 396           sync_encryption_handler_.get(),
 397           sync_encryption_handler_->GetCryptographerUnsafe()));
 398
 399   DVLOG(1) << "Username: " << username;
 400   if (!OpenDirectory(username)) {
 401     NotifyInitializationFailure();
 402     LOG(ERROR) << "Sync manager initialization failed!";
 403     return;
 404   }
 405
 406   connection_manager_.reset(new SyncAPIServerConnectionManager(
 407       sync_server_and_path, port, use_ssl,
 408       post_factory.release(), cancelation_signal));
 409   connection_manager_->set_client_id(directory()->cache_guid());
 410   connection_manager_->AddListener(this);
 411
 412   std::string sync_id = directory()->cache_guid();
 413
 414   DVLOG(1) << "Setting sync client ID: " << sync_id;
 415   allstatus_.SetSyncId(sync_id);
 416   DVLOG(1) << "Setting invalidator client ID: " << invalidator_client_id;
 417   allstatus_.SetInvalidatorClientId(invalidator_client_id);
 418
 419   model_type_registry_.reset(new ModelTypeRegistry(workers, directory()));
 420
 421   // Build a SyncSessionContext and store the worker in it.
 422   DVLOG(1) << "Sync is bringing up SyncSessionContext.";
 423   std::vector<SyncEngineEventListener*> listeners;
 424   listeners.push_back(&allstatus_);
 425   listeners.push_back(this);
 426   session_context_ = internal_components_factory->BuildContext(
 427       connection_manager_.get(),
 428       directory(),
 429       extensions_activity,
 430       listeners,
 431       &debug_info_event_listener_,
 432       &traffic_recorder_,
 433       model_type_registry_.get(),
 434       invalidator_client_id).Pass();
 435   session_context_->set_account_name(credentials.email);
 436   scheduler_ = internal_components_factory->BuildScheduler(
 437       name_, session_context_.get(), cancelation_signal).Pass();
 438
 439   scheduler_->Start(SyncScheduler::CONFIGURATION_MODE);
 440
 441   initialized_ = true;
 442
 443   net::NetworkChangeNotifier::AddIPAddressObserver(this);
 444   net::NetworkChangeNotifier::AddConnectionTypeObserver(this);
 445   observing_network_connectivity_changes_ = true;
 446
 447   UpdateCredentials(credentials);
 448
 449   NotifyInitializationSuccess();
 450 }
 451
 452 void SyncManagerImpl::NotifyInitializationSuccess() {
 453   FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 454                     OnInitializationComplete(
 455                         MakeWeakHandle(weak_ptr_factory_.GetWeakPtr()),
 456                         MakeWeakHandle(debug_info_event_listener_.GetWeakPtr()),
 457                         true, InitialSyncEndedTypes()));
 458 }
 459
 460 void SyncManagerImpl::NotifyInitializationFailure() {
 461   FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 462                     OnInitializationComplete(
 463                         MakeWeakHandle(weak_ptr_factory_.GetWeakPtr()),
 464                         MakeWeakHandle(debug_info_event_listener_.GetWeakPtr()),
 465                         false, ModelTypeSet()));
 466 }
 467
 468 void SyncManagerImpl::OnPassphraseRequired(
 469     PassphraseRequiredReason reason,
 470     const sync_pb::EncryptedData& pending_keys) {
 471   // Does nothing.
 472 }
 473
 474 void SyncManagerImpl::OnPassphraseAccepted() {
 475   // Does nothing.
 476 }
 477
 478 void SyncManagerImpl::OnBootstrapTokenUpdated(
 479     const std::string& bootstrap_token,
 480     BootstrapTokenType type) {
 481   if (type == KEYSTORE_BOOTSTRAP_TOKEN)
 482     allstatus_.SetHasKeystoreKey(true);
 483 }
 484
 485 void SyncManagerImpl::OnEncryptedTypesChanged(ModelTypeSet encrypted_types,
 486                                               bool encrypt_everything) {
 487   allstatus_.SetEncryptedTypes(encrypted_types);
 488 }
 489
 490 void SyncManagerImpl::OnEncryptionComplete() {
 491   // Does nothing.
 492 }
 493
 494 void SyncManagerImpl::OnCryptographerStateChanged(
 495     Cryptographer* cryptographer) {
 496   allstatus_.SetCryptographerReady(cryptographer->is_ready());
 497   allstatus_.SetCryptoHasPendingKeys(cryptographer->has_pending_keys());
 498   allstatus_.SetKeystoreMigrationTime(
 499       sync_encryption_handler_->migration_time());
 500 }
 501
 502 void SyncManagerImpl::OnPassphraseTypeChanged(
 503     PassphraseType type,
 504     base::Time explicit_passphrase_time) {
 505   allstatus_.SetPassphraseType(type);
 506   allstatus_.SetKeystoreMigrationTime(
 507       sync_encryption_handler_->migration_time());
 508 }
 509
 510 void SyncManagerImpl::StartSyncingNormally(
 511     const ModelSafeRoutingInfo& routing_info) {
 512   // Start the sync scheduler.
 513   // TODO(sync): We always want the newest set of routes when we switch back
 514   // to normal mode. Figure out how to enforce set_routing_info is always
 515   // appropriately set and that it's only modified when switching to normal
 516   // mode.
 517   DCHECK(thread_checker_.CalledOnValidThread());
 518   session_context_->SetRoutingInfo(routing_info);
 519   scheduler_->Start(SyncScheduler::NORMAL_MODE);
 520 }
 521
 522 syncable::Directory* SyncManagerImpl::directory() {
 523   return share_.directory.get();
 524 }
 525
 526 const SyncScheduler* SyncManagerImpl::scheduler() const {
 527   return scheduler_.get();
 528 }
 529
 530 bool SyncManagerImpl::GetHasInvalidAuthTokenForTest() const {
 531   return connection_manager_->HasInvalidAuthToken();
 532 }
 533
 534 bool SyncManagerImpl::OpenDirectory(const std::string& username) {
 535   DCHECK(!initialized_) << "Should only happen once";
 536
 537   // Set before Open().
 538   change_observer_ = MakeWeakHandle(js_mutation_event_observer_.AsWeakPtr());
 539   WeakHandle<syncable::TransactionObserver> transaction_observer(
 540       MakeWeakHandle(js_mutation_event_observer_.AsWeakPtr()));
 541
 542   syncable::DirOpenResult open_result = syncable::NOT_INITIALIZED;
 543   open_result = directory()->Open(username, this, transaction_observer);
 544   if (open_result != syncable::OPENED) {
 545     LOG(ERROR) << "Could not open share for:" << username;
 546     return false;
 547   }
 548
 549   // Unapplied datatypes (those that do not have initial sync ended set) get
 550   // re-downloaded during any configuration. But, it's possible for a datatype
 551   // to have a progress marker but not have initial sync ended yet, making
 552   // it a candidate for migration. This is a problem, as the DataTypeManager
 553   // does not support a migration while it's already in the middle of a
 554   // configuration. As a result, any partially synced datatype can stall the
 555   // DTM, waiting for the configuration to complete, which it never will due
 556   // to the migration error. In addition, a partially synced nigori will
 557   // trigger the migration logic before the backend is initialized, resulting
 558   // in crashes. We therefore detect and purge any partially synced types as
 559   // part of initialization.
 560   if (!PurgePartiallySyncedTypes())
 561     return false;
 562
 563   return true;
 564 }
 565
 566 bool SyncManagerImpl::PurgePartiallySyncedTypes() {
 567   ModelTypeSet partially_synced_types = ModelTypeSet::All();
 568   partially_synced_types.RemoveAll(InitialSyncEndedTypes());
 569   partially_synced_types.RemoveAll(GetTypesWithEmptyProgressMarkerToken(
 570       ModelTypeSet::All()));
 571
 572   DVLOG(1) << "Purging partially synced types "
 573            << ModelTypeSetToString(partially_synced_types);
 574   UMA_HISTOGRAM_COUNTS("Sync.PartiallySyncedTypes",
 575                        partially_synced_types.Size());
 576   if (partially_synced_types.Empty())
 577     return true;
 578   return directory()->PurgeEntriesWithTypeIn(partially_synced_types,
 579                                              ModelTypeSet(),
 580                                              ModelTypeSet());
 581 }
 582
 583 bool SyncManagerImpl::PurgeDisabledTypes(
 584     ModelTypeSet to_purge,
 585     ModelTypeSet to_journal,
 586     ModelTypeSet to_unapply) {
 587   if (to_purge.Empty())
 588     return true;
 589   DVLOG(1) << "Purging disabled types " << ModelTypeSetToString(to_purge);
 590   DCHECK(to_purge.HasAll(to_journal));
 591   DCHECK(to_purge.HasAll(to_unapply));
 592   return directory()->PurgeEntriesWithTypeIn(to_purge, to_journal, to_unapply);
 593 }
 594
 595 void SyncManagerImpl::UpdateCredentials(const SyncCredentials& credentials) {
 596   DCHECK(thread_checker_.CalledOnValidThread());
 597   DCHECK(initialized_);
 598   DCHECK(!credentials.email.empty());
 599   DCHECK(!credentials.sync_token.empty());
 600
 601   observing_network_connectivity_changes_ = true;
 602   if (!connection_manager_->SetAuthToken(credentials.sync_token))
 603     return;  // Auth token is known to be invalid, so exit early.
 604
 605   scheduler_->OnCredentialsUpdated();
 606
 607   // TODO(zea): pass the credential age to the debug info event listener.
 608 }
 609
 610 void SyncManagerImpl::AddObserver(SyncManager::Observer* observer) {
 611   DCHECK(thread_checker_.CalledOnValidThread());
 612   observers_.AddObserver(observer);
 613 }
 614
 615 void SyncManagerImpl::RemoveObserver(SyncManager::Observer* observer) {
 616   DCHECK(thread_checker_.CalledOnValidThread());
 617   observers_.RemoveObserver(observer);
 618 }
 619
 620 void SyncManagerImpl::ShutdownOnSyncThread() {
 621   DCHECK(thread_checker_.CalledOnValidThread());
 622
 623   // Prevent any in-flight method calls from running.  Also
 624   // invalidates |weak_handle_this_| and |change_observer_|.
 625   weak_ptr_factory_.InvalidateWeakPtrs();
 626   js_mutation_event_observer_.InvalidateWeakPtrs();
 627
 628   scheduler_.reset();
 629   session_context_.reset();
 630   model_type_registry_.reset();
 631
 632   if (sync_encryption_handler_) {
 633     sync_encryption_handler_->RemoveObserver(&debug_info_event_listener_);
 634     sync_encryption_handler_->RemoveObserver(this);
 635   }
 636
 637   SetJsEventHandler(WeakHandle<JsEventHandler>());
 638   RemoveObserver(&js_sync_manager_observer_);
 639
 640   RemoveObserver(&debug_info_event_listener_);
 641
 642   // |connection_manager_| may end up being NULL here in tests (in synchronous
 643   // initialization mode).
 644   //
 645   // TODO(akalin): Fix this behavior.
 646   if (connection_manager_)
 647     connection_manager_->RemoveListener(this);
 648   connection_manager_.reset();
 649
 650   net::NetworkChangeNotifier::RemoveIPAddressObserver(this);
 651   net::NetworkChangeNotifier::RemoveConnectionTypeObserver(this);
 652   observing_network_connectivity_changes_ = false;
 653
 654   if (initialized_ && directory()) {
 655     directory()->SaveChanges();
 656   }
 657
 658   share_.directory.reset();
 659
 660   change_delegate_ = NULL;
 661
 662   initialized_ = false;
 663
 664   // We reset these here, since only now we know they will not be
 665   // accessed from other threads (since we shut down everything).
 666   change_observer_.Reset();
 667   weak_handle_this_.Reset();
 668 }
 669
 670 void SyncManagerImpl::OnIPAddressChanged() {
 671   if (!observing_network_connectivity_changes_) {
 672     DVLOG(1) << "IP address change dropped.";
 673     return;
 674   }
 675   DVLOG(1) << "IP address change detected.";
 676   OnNetworkConnectivityChangedImpl();
 677 }
 678
 679 void SyncManagerImpl::OnConnectionTypeChanged(
 680   net::NetworkChangeNotifier::ConnectionType) {
 681   if (!observing_network_connectivity_changes_) {
 682     DVLOG(1) << "Connection type change dropped.";
 683     return;
 684   }
 685   DVLOG(1) << "Connection type change detected.";
 686   OnNetworkConnectivityChangedImpl();
 687 }
 688
 689 void SyncManagerImpl::OnNetworkConnectivityChangedImpl() {
 690   DCHECK(thread_checker_.CalledOnValidThread());
 691   scheduler_->OnConnectionStatusChange();
 692 }
 693
 694 void SyncManagerImpl::OnServerConnectionEvent(
 695     const ServerConnectionEvent& event) {
 696   DCHECK(thread_checker_.CalledOnValidThread());
 697   if (event.connection_code ==
 698       HttpResponse::SERVER_CONNECTION_OK) {
 699     FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 700                       OnConnectionStatusChange(CONNECTION_OK));
 701   }
 702
 703   if (event.connection_code == HttpResponse::SYNC_AUTH_ERROR) {
 704     observing_network_connectivity_changes_ = false;
 705     FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 706                       OnConnectionStatusChange(CONNECTION_AUTH_ERROR));
 707   }
 708
 709   if (event.connection_code == HttpResponse::SYNC_SERVER_ERROR) {
 710     FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 711                       OnConnectionStatusChange(CONNECTION_SERVER_ERROR));
 712   }
 713 }
 714
 715 void SyncManagerImpl::HandleTransactionCompleteChangeEvent(
 716     ModelTypeSet models_with_changes) {
 717   // This notification happens immediately after the transaction mutex is
 718   // released. This allows work to be performed without blocking other threads
 719   // from acquiring a transaction.
 720   if (!change_delegate_)
 721     return;
 722
 723   // Call commit.
 724   for (ModelTypeSet::Iterator it = models_with_changes.First();
 725        it.Good(); it.Inc()) {
 726     change_delegate_->OnChangesComplete(it.Get());
 727     change_observer_.Call(
 728         FROM_HERE,
 729         &SyncManager::ChangeObserver::OnChangesComplete,
 730         it.Get());
 731   }
 732 }
 733
 734 ModelTypeSet
 735 SyncManagerImpl::HandleTransactionEndingChangeEvent(
 736     const ImmutableWriteTransactionInfo& write_transaction_info,
 737     syncable::BaseTransaction* trans) {
 738   // This notification happens immediately before a syncable WriteTransaction
 739   // falls out of scope. It happens while the channel mutex is still held,
 740   // and while the transaction mutex is held, so it cannot be re-entrant.
 741   if (!change_delegate_ || change_records_.empty())
 742     return ModelTypeSet();
 743
 744   // This will continue the WriteTransaction using a read only wrapper.
 745   // This is the last chance for read to occur in the WriteTransaction
 746   // that's closing. This special ReadTransaction will not close the
 747   // underlying transaction.
 748   ReadTransaction read_trans(GetUserShare(), trans);
 749
 750   ModelTypeSet models_with_changes;
 751   for (ChangeRecordMap::const_iterator it = change_records_.begin();
 752       it != change_records_.end(); ++it) {
 753     DCHECK(!it->second.Get().empty());
 754     ModelType type = ModelTypeFromInt(it->first);
 755     change_delegate_->
 756         OnChangesApplied(type, trans->directory()->GetTransactionVersion(type),
 757                          &read_trans, it->second);
 758     change_observer_.Call(FROM_HERE,
 759         &SyncManager::ChangeObserver::OnChangesApplied,
 760         type, write_transaction_info.Get().id, it->second);
 761     models_with_changes.Put(type);
 762   }
 763   change_records_.clear();
 764   return models_with_changes;
 765 }
 766
 767 void SyncManagerImpl::HandleCalculateChangesChangeEventFromSyncApi(
 768     const ImmutableWriteTransactionInfo& write_transaction_info,
 769     syncable::BaseTransaction* trans,
 770     std::vector<int64>* entries_changed) {
 771   // We have been notified about a user action changing a sync model.
 772   LOG_IF(WARNING, !change_records_.empty()) <<
 773       "CALCULATE_CHANGES called with unapplied old changes.";
 774
 775   // The mutated model type, or UNSPECIFIED if nothing was mutated.
 776   ModelTypeSet mutated_model_types;
 777
 778   const syncable::ImmutableEntryKernelMutationMap& mutations =
 779       write_transaction_info.Get().mutations;
 780   for (syncable::EntryKernelMutationMap::const_iterator it =
 781            mutations.Get().begin(); it != mutations.Get().end(); ++it) {
 782     if (!it->second.mutated.ref(syncable::IS_UNSYNCED)) {
 783       continue;
 784     }
 785
 786     ModelType model_type =
 787         GetModelTypeFromSpecifics(it->second.mutated.ref(SPECIFICS));
 788     if (model_type < FIRST_REAL_MODEL_TYPE) {
 789       NOTREACHED() << "Permanent or underspecified item changed via syncapi.";
 790       continue;
 791     }
 792
 793     // Found real mutation.
 794     if (model_type != UNSPECIFIED) {
 795       mutated_model_types.Put(model_type);
 796       entries_changed->push_back(it->second.mutated.ref(syncable::META_HANDLE));
 797     }
 798   }
 799
 800   // Nudge if necessary.
 801   if (!mutated_model_types.Empty()) {
 802     if (weak_handle_this_.IsInitialized()) {
 803       weak_handle_this_.Call(FROM_HERE,
 804                              &SyncManagerImpl::RequestNudgeForDataTypes,
 805                              FROM_HERE,
 806                              mutated_model_types);
 807     } else {
 808       NOTREACHED();
 809     }
 810   }
 811 }
 812
 813 void SyncManagerImpl::SetExtraChangeRecordData(int64 id,
 814     ModelType type, ChangeReorderBuffer* buffer,
 815     Cryptographer* cryptographer, const syncable::EntryKernel& original,
 816     bool existed_before, bool exists_now) {
 817   // If this is a deletion and the datatype was encrypted, we need to decrypt it
 818   // and attach it to the buffer.
 819   if (!exists_now && existed_before) {
 820     sync_pb::EntitySpecifics original_specifics(original.ref(SPECIFICS));
 821     if (type == PASSWORDS) {
 822       // Passwords must use their own legacy ExtraPasswordChangeRecordData.
 823       scoped_ptr<sync_pb::PasswordSpecificsData> data(
 824           DecryptPasswordSpecifics(original_specifics, cryptographer));
 825       if (!data) {
 826         NOTREACHED();
 827         return;
 828       }
 829       buffer->SetExtraDataForId(id, new ExtraPasswordChangeRecordData(*data));
 830     } else if (original_specifics.has_encrypted()) {
 831       // All other datatypes can just create a new unencrypted specifics and
 832       // attach it.
 833       const sync_pb::EncryptedData& encrypted = original_specifics.encrypted();
 834       if (!cryptographer->Decrypt(encrypted, &original_specifics)) {
 835         NOTREACHED();
 836         return;
 837       }
 838     }
 839     buffer->SetSpecificsForId(id, original_specifics);
 840   }
 841 }
 842
 843 void SyncManagerImpl::HandleCalculateChangesChangeEventFromSyncer(
 844     const ImmutableWriteTransactionInfo& write_transaction_info,
 845     syncable::BaseTransaction* trans,
 846     std::vector<int64>* entries_changed) {
 847   // We only expect one notification per sync step, so change_buffers_ should
 848   // contain no pending entries.
 849   LOG_IF(WARNING, !change_records_.empty()) <<
 850       "CALCULATE_CHANGES called with unapplied old changes.";
 851
 852   ChangeReorderBuffer change_buffers[MODEL_TYPE_COUNT];
 853
 854   Cryptographer* crypto = directory()->GetCryptographer(trans);
 855   const syncable::ImmutableEntryKernelMutationMap& mutations =
 856       write_transaction_info.Get().mutations;
 857   for (syncable::EntryKernelMutationMap::const_iterator it =
 858            mutations.Get().begin(); it != mutations.Get().end(); ++it) {
 859     bool existed_before = !it->second.original.ref(syncable::IS_DEL);
 860     bool exists_now = !it->second.mutated.ref(syncable::IS_DEL);
 861
 862     // Omit items that aren't associated with a model.
 863     ModelType type =
 864         GetModelTypeFromSpecifics(it->second.mutated.ref(SPECIFICS));
 865     if (type < FIRST_REAL_MODEL_TYPE)
 866       continue;
 867
 868     int64 handle = it->first;
 869     if (exists_now && !existed_before)
 870       change_buffers[type].PushAddedItem(handle);
 871     else if (!exists_now && existed_before)
 872       change_buffers[type].PushDeletedItem(handle);
 873     else if (exists_now && existed_before &&
 874              VisiblePropertiesDiffer(it->second, crypto)) {
 875       change_buffers[type].PushUpdatedItem(handle);
 876     }
 877
 878     SetExtraChangeRecordData(handle, type, &change_buffers[type], crypto,
 879                              it->second.original, existed_before, exists_now);
 880   }
 881
 882   ReadTransaction read_trans(GetUserShare(), trans);
 883   for (int i = FIRST_REAL_MODEL_TYPE; i < MODEL_TYPE_COUNT; ++i) {
 884     if (!change_buffers[i].IsEmpty()) {
 885       if (change_buffers[i].GetAllChangesInTreeOrder(&read_trans,
 886                                                      &(change_records_[i]))) {
 887         for (size_t j = 0; j < change_records_[i].Get().size(); ++j)
 888           entries_changed->push_back((change_records_[i].Get())[j].id);
 889       }
 890       if (change_records_[i].Get().empty())
 891         change_records_.erase(i);
 892     }
 893   }
 894 }
 895
 896 TimeDelta SyncManagerImpl::GetNudgeDelayTimeDelta(
 897     const ModelType& model_type) {
 898   return NudgeStrategy::GetNudgeDelayTimeDelta(model_type, this);
 899 }
 900
 901 void SyncManagerImpl::RequestNudgeForDataTypes(
 902     const tracked_objects::Location& nudge_location,
 903     ModelTypeSet types) {
 904   debug_info_event_listener_.OnNudgeFromDatatype(types.First().Get());
 905
 906   // TODO(lipalani) : Calculate the nudge delay based on all types.
 907   base::TimeDelta nudge_delay = NudgeStrategy::GetNudgeDelayTimeDelta(
 908       types.First().Get(),
 909       this);
 910   allstatus_.IncrementNudgeCounter(NUDGE_SOURCE_LOCAL);
 911   scheduler_->ScheduleLocalNudge(nudge_delay,
 912                                  types,
 913                                  nudge_location);
 914 }
 915
 916 void SyncManagerImpl::OnSyncEngineEvent(const SyncEngineEvent& event) {
 917   DCHECK(thread_checker_.CalledOnValidThread());
 918   // Only send an event if this is due to a cycle ending and this cycle
 919   // concludes a canonical "sync" process; that is, based on what is known
 920   // locally we are "all happy" and up-to-date.  There may be new changes on
 921   // the server, but we'll get them on a subsequent sync.
 922   //
 923   // Notifications are sent at the end of every sync cycle, regardless of
 924   // whether we should sync again.
 925   if (event.what_happened == SyncEngineEvent::SYNC_CYCLE_ENDED) {
 926     if (!initialized_) {
 927       DVLOG(1) << "OnSyncCycleCompleted not sent because sync api is not "
 928                << "initialized";
 929       return;
 930     }
 931
 932     DVLOG(1) << "Sending OnSyncCycleCompleted";
 933     FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 934                       OnSyncCycleCompleted(event.snapshot));
 935   }
 936
 937   if (event.what_happened == SyncEngineEvent::STOP_SYNCING_PERMANENTLY) {
 938     FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 939                       OnStopSyncingPermanently());
 940     return;
 941   }
 942
 943   if (event.what_happened == SyncEngineEvent::ACTIONABLE_ERROR) {
 944     FOR_EACH_OBSERVER(
 945         SyncManager::Observer, observers_,
 946         OnActionableError(
 947             event.snapshot.model_neutral_state().sync_protocol_error));
 948     return;
 949   }
 950 }
 951
 952 void SyncManagerImpl::SetJsEventHandler(
 953     const WeakHandle<JsEventHandler>& event_handler) {
 954   js_event_handler_ = event_handler;
 955   js_sync_manager_observer_.SetJsEventHandler(js_event_handler_);
 956   js_mutation_event_observer_.SetJsEventHandler(js_event_handler_);
 957   js_sync_encryption_handler_observer_.SetJsEventHandler(js_event_handler_);
 958 }
 959
 960 void SyncManagerImpl::ProcessJsMessage(
 961     const std::string& name, const JsArgList& args,
 962     const WeakHandle<JsReplyHandler>& reply_handler) {
 963   if (!initialized_) {
 964     NOTREACHED();
 965     return;
 966   }
 967
 968   if (!reply_handler.IsInitialized()) {
 969     DVLOG(1) << "Uninitialized reply handler; dropping unknown message "
 970             << name << " with args " << args.ToString();
 971     return;
 972   }
 973
 974   JsMessageHandler js_message_handler = js_message_handlers_[name];
 975   if (js_message_handler.is_null()) {
 976     DVLOG(1) << "Dropping unknown message " << name
 977              << " with args " << args.ToString();
 978     return;
 979   }
 980
 981   reply_handler.Call(FROM_HERE,
 982                      &JsReplyHandler::HandleJsReply,
 983                      name, js_message_handler.Run(args));
 984 }
 985
 986 void SyncManagerImpl::BindJsMessageHandler(
 987     const std::string& name,
 988     UnboundJsMessageHandler unbound_message_handler) {
 989   js_message_handlers_[name] =
 990       base::Bind(unbound_message_handler, base::Unretained(this));
 991 }
 992
 993 base::DictionaryValue* SyncManagerImpl::NotificationInfoToValue(
 994     const NotificationInfoMap& notification_info) {
 995   base::DictionaryValue* value = new base::DictionaryValue();
 996
 997   for (NotificationInfoMap::const_iterator it = notification_info.begin();
 998       it != notification_info.end(); ++it) {
 999     const std::string model_type_str = ModelTypeToString(it->first);
1000     value->Set(model_type_str, it->second.ToValue());
1001   }
1002
1003   return value;
1004 }
1005
1006 std::string SyncManagerImpl::NotificationInfoToString(
1007     const NotificationInfoMap& notification_info) {
1008   scoped_ptr<base::DictionaryValue> value(
1009       NotificationInfoToValue(notification_info));
1010   std::string str;
1011   base::JSONWriter::Write(value.get(), &str);
1012   return str;
1013 }
1014
1015 JsArgList SyncManagerImpl::GetNotificationState(
1016     const JsArgList& args) {
1017   const std::string& notification_state =
1018       InvalidatorStateToString(invalidator_state_);
1019   DVLOG(1) << "GetNotificationState: " << notification_state;
1020   base::ListValue return_args;
1021   return_args.Append(new base::StringValue(notification_state));
1022   return JsArgList(&return_args);
1023 }
1024
1025 JsArgList SyncManagerImpl::GetNotificationInfo(
1026     const JsArgList& args) {
1027   DVLOG(1) << "GetNotificationInfo: "
1028            << NotificationInfoToString(notification_info_map_);
1029   base::ListValue return_args;
1030   return_args.Append(NotificationInfoToValue(notification_info_map_));
1031   return JsArgList(&return_args);
1032 }
1033
1034 JsArgList SyncManagerImpl::GetClientServerTraffic(
1035     const JsArgList& args) {
1036   base::ListValue return_args;
1037   base::ListValue* value = traffic_recorder_.ToValue();
1038   if (value != NULL)
1039     return_args.Append(value);
1040   return JsArgList(&return_args);
1041 }
1042
1043 JsArgList SyncManagerImpl::GetAllNodes(const JsArgList& args) {
1044   ReadTransaction trans(FROM_HERE, GetUserShare());
1045   base::ListValue return_args;
1046   scoped_ptr<base::ListValue> nodes(
1047       trans.GetDirectory()->GetAllNodeDetails(trans.GetWrappedTrans()));
1048   return_args.Append(nodes.release());
1049   return JsArgList(&return_args);
1050 }
1051
1052 void SyncManagerImpl::UpdateNotificationInfo(
1053     const ObjectIdInvalidationMap& invalidation_map) {
1054   ObjectIdSet ids = invalidation_map.GetObjectIds();
1055   for (ObjectIdSet::const_iterator it = ids.begin(); it != ids.end(); ++it) {
1056     ModelType type = UNSPECIFIED;
1057     if (!ObjectIdToRealModelType(*it, &type)) {
1058       continue;
1059     }
1060     const SingleObjectInvalidationSet& type_invalidations =
1061         invalidation_map.ForObject(*it);
1062     for (SingleObjectInvalidationSet::const_iterator inv_it =
1063          type_invalidations.begin(); inv_it != type_invalidations.end();
1064          ++inv_it) {
1065       NotificationInfo* info = &notification_info_map_[type];
1066       info->total_count++;
1067       std::string payload =
1068           inv_it->is_unknown_version() ? "UNKNOWN" : inv_it->payload();
1069       info->payload = payload;
1070     }
1071   }
1072 }
1073
1074 void SyncManagerImpl::OnInvalidatorStateChange(InvalidatorState state) {
1075   DCHECK(thread_checker_.CalledOnValidThread());
1076
1077   const std::string& state_str = InvalidatorStateToString(state);
1078   invalidator_state_ = state;
1079   DVLOG(1) << "Invalidator state changed to: " << state_str;
1080   const bool notifications_enabled =
1081       (invalidator_state_ == INVALIDATIONS_ENABLED);
1082   allstatus_.SetNotificationsEnabled(notifications_enabled);
1083   scheduler_->SetNotificationsEnabled(notifications_enabled);
1084
1085   if (js_event_handler_.IsInitialized()) {
1086     base::DictionaryValue details;
1087     details.SetString("state", state_str);
1088     js_event_handler_.Call(FROM_HERE,
1089                            &JsEventHandler::HandleJsEvent,
1090                            "onNotificationStateChange",
1091                            JsEventDetails(&details));
1092   }
1093 }
1094
1095 void SyncManagerImpl::OnIncomingInvalidation(
1096     const ObjectIdInvalidationMap& invalidation_map) {
1097   DCHECK(thread_checker_.CalledOnValidThread());
1098
1099   // We should never receive IDs from non-sync objects.
1100   ObjectIdSet ids = invalidation_map.GetObjectIds();
1101   for (ObjectIdSet::const_iterator it = ids.begin(); it != ids.end(); ++it) {
1102     ModelType type;
1103     if (!ObjectIdToRealModelType(*it, &type)) {
1104       DLOG(WARNING) << "Notification has invalid id: " << ObjectIdToString(*it);
1105     }
1106   }
1107
1108   if (invalidation_map.Empty()) {
1109     LOG(WARNING) << "Sync received invalidation without any type information.";
1110   } else {
1111     allstatus_.IncrementNudgeCounter(NUDGE_SOURCE_NOTIFICATION);
1112     scheduler_->ScheduleInvalidationNudge(
1113         TimeDelta::FromMilliseconds(kSyncSchedulerDelayMsec),
1114         invalidation_map, FROM_HERE);
1115     allstatus_.IncrementNotificationsReceived();
1116     UpdateNotificationInfo(invalidation_map);
1117     debug_info_event_listener_.OnIncomingNotification(invalidation_map);
1118   }
1119
1120   if (js_event_handler_.IsInitialized()) {
1121     base::DictionaryValue details;
1122     base::ListValue* changed_types = new base::ListValue();
1123     details.Set("changedTypes", changed_types);
1124
1125     ObjectIdSet id_set = invalidation_map.GetObjectIds();
1126     ModelTypeSet nudged_types = ObjectIdSetToModelTypeSet(id_set);
1127     DCHECK(!nudged_types.Empty());
1128     for (ModelTypeSet::Iterator it = nudged_types.First();
1129          it.Good(); it.Inc()) {
1130       const std::string model_type_str = ModelTypeToString(it.Get());
1131       changed_types->Append(new base::StringValue(model_type_str));
1132     }
1133     details.SetString("source", "REMOTE_INVALIDATION");
1134     js_event_handler_.Call(FROM_HERE,
1135                            &JsEventHandler::HandleJsEvent,
1136                            "onIncomingNotification",
1137                            JsEventDetails(&details));
1138   }
1139 }
1140
1141 void SyncManagerImpl::RefreshTypes(ModelTypeSet types) {
1142   DCHECK(thread_checker_.CalledOnValidThread());
1143   if (types.Empty()) {
1144     LOG(WARNING) << "Sync received refresh request with no types specified.";
1145   } else {
1146     allstatus_.IncrementNudgeCounter(NUDGE_SOURCE_LOCAL_REFRESH);
1147     scheduler_->ScheduleLocalRefreshRequest(
1148         TimeDelta::FromMilliseconds(kSyncRefreshDelayMsec),
1149         types, FROM_HERE);
1150   }
1151
1152   if (js_event_handler_.IsInitialized()) {
1153     base::DictionaryValue details;
1154     base::ListValue* changed_types = new base::ListValue();
1155     details.Set("changedTypes", changed_types);
1156     for (ModelTypeSet::Iterator it = types.First(); it.Good(); it.Inc()) {
1157       const std::string& model_type_str =
1158           ModelTypeToString(it.Get());
1159       changed_types->Append(new base::StringValue(model_type_str));
1160     }
1161     details.SetString("source", "LOCAL_INVALIDATION");
1162     js_event_handler_.Call(FROM_HERE,
1163                            &JsEventHandler::HandleJsEvent,
1164                            "onIncomingNotification",
1165                            JsEventDetails(&details));
1166   }
1167 }
1168
1169 SyncStatus SyncManagerImpl::GetDetailedStatus() const {
1170   return allstatus_.status();
1171 }
1172
1173 void SyncManagerImpl::SaveChanges() {
1174   directory()->SaveChanges();
1175 }
1176
1177 UserShare* SyncManagerImpl::GetUserShare() {
1178   DCHECK(initialized_);
1179   return &share_;
1180 }
1181
1182 const std::string SyncManagerImpl::cache_guid() {
1183   DCHECK(initialized_);
1184   return directory()->cache_guid();
1185 }
1186
1187 bool SyncManagerImpl::ReceivedExperiment(Experiments* experiments) {
1188   ReadTransaction trans(FROM_HERE, GetUserShare());
1189   ReadNode nigori_node(&trans);
1190   if (nigori_node.InitByTagLookup(kNigoriTag) != BaseNode::INIT_OK) {
1191     DVLOG(1) << "Couldn't find Nigori node.";
1192     return false;
1193   }
1194   bool found_experiment = false;
1195
1196   ReadNode autofill_culling_node(&trans);
1197   if (autofill_culling_node.InitByClientTagLookup(
1198           syncer::EXPERIMENTS,
1199           syncer::kAutofillCullingTag) == BaseNode::INIT_OK &&
1200       autofill_culling_node.GetExperimentsSpecifics().
1201           autofill_culling().enabled()) {
1202     experiments->autofill_culling = true;
1203     found_experiment = true;
1204   }
1205
1206   ReadNode favicon_sync_node(&trans);
1207   if (favicon_sync_node.InitByClientTagLookup(
1208           syncer::EXPERIMENTS,
1209           syncer::kFaviconSyncTag) == BaseNode::INIT_OK) {
1210     experiments->favicon_sync_limit =
1211         favicon_sync_node.GetExperimentsSpecifics().favicon_sync().
1212             favicon_sync_limit();
1213     found_experiment = true;
1214   }
1215
1216   ReadNode pre_commit_update_avoidance_node(&trans);
1217   if (pre_commit_update_avoidance_node.InitByClientTagLookup(
1218           syncer::EXPERIMENTS,
1219           syncer::kPreCommitUpdateAvoidanceTag) == BaseNode::INIT_OK) {
1220     session_context_->set_server_enabled_pre_commit_update_avoidance(
1221         pre_commit_update_avoidance_node.GetExperimentsSpecifics().
1222             pre_commit_update_avoidance().enabled());
1223     // We don't bother setting found_experiment.  The frontend doesn't need to
1224     // know about this.
1225   }
1226
1227   return found_experiment;
1228 }
1229
1230 bool SyncManagerImpl::HasUnsyncedItems() {
1231   ReadTransaction trans(FROM_HERE, GetUserShare());
1232   return (trans.GetWrappedTrans()->directory()->unsynced_entity_count() != 0);
1233 }
1234
1235 SyncEncryptionHandler* SyncManagerImpl::GetEncryptionHandler() {
1236   return sync_encryption_handler_.get();
1237 }
1238
1239 // static.
1240 int SyncManagerImpl::GetDefaultNudgeDelay() {
1241   return kDefaultNudgeDelayMilliseconds;
1242 }
1243
1244 // static.
1245 int SyncManagerImpl::GetPreferencesNudgeDelay() {
1246   return kPreferencesNudgeDelayMilliseconds;
1247 }
1248
1249 }  // namespace syncer