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| 1 // Copyright 2014 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/public/shared_model_type_processor.h" | |
| 6 | |
| 7 #include <utility> | |
| 8 #include <vector> | |
| 9 | |
| 10 #include "base/bind.h" | |
| 11 #include "base/location.h" | |
| 12 #include "base/memory/ptr_util.h" | |
| 13 #include "base/metrics/histogram.h" | |
| 14 #include "base/threading/thread_task_runner_handle.h" | |
| 15 #include "sync/engine/commit_queue.h" | |
| 16 #include "sync/internal_api/public/activation_context.h" | |
| 17 #include "sync/internal_api/public/processor_entity_tracker.h" | |
| 18 #include "sync/syncable/syncable_util.h" | |
| 19 | |
| 20 namespace syncer_v2 { | |
| 21 | |
| 22 namespace { | |
| 23 | |
| 24 class ModelTypeProcessorProxy : public ModelTypeProcessor { | |
| 25 public: | |
| 26 ModelTypeProcessorProxy( | |
| 27 const base::WeakPtr<ModelTypeProcessor>& processor, | |
| 28 const scoped_refptr<base::SequencedTaskRunner>& processor_task_runner); | |
| 29 ~ModelTypeProcessorProxy() override; | |
| 30 | |
| 31 void ConnectSync(std::unique_ptr<CommitQueue> worker) override; | |
| 32 void DisconnectSync() override; | |
| 33 void OnCommitCompleted(const sync_pb::DataTypeState& type_state, | |
| 34 const CommitResponseDataList& response_list) override; | |
| 35 void OnUpdateReceived(const sync_pb::DataTypeState& type_state, | |
| 36 const UpdateResponseDataList& updates) override; | |
| 37 | |
| 38 private: | |
| 39 base::WeakPtr<ModelTypeProcessor> processor_; | |
| 40 scoped_refptr<base::SequencedTaskRunner> processor_task_runner_; | |
| 41 }; | |
| 42 | |
| 43 ModelTypeProcessorProxy::ModelTypeProcessorProxy( | |
| 44 const base::WeakPtr<ModelTypeProcessor>& processor, | |
| 45 const scoped_refptr<base::SequencedTaskRunner>& processor_task_runner) | |
| 46 : processor_(processor), processor_task_runner_(processor_task_runner) {} | |
| 47 | |
| 48 ModelTypeProcessorProxy::~ModelTypeProcessorProxy() {} | |
| 49 | |
| 50 void ModelTypeProcessorProxy::ConnectSync(std::unique_ptr<CommitQueue> worker) { | |
| 51 processor_task_runner_->PostTask( | |
| 52 FROM_HERE, base::Bind(&ModelTypeProcessor::ConnectSync, processor_, | |
| 53 base::Passed(std::move(worker)))); | |
| 54 } | |
| 55 | |
| 56 void ModelTypeProcessorProxy::DisconnectSync() { | |
| 57 processor_task_runner_->PostTask( | |
| 58 FROM_HERE, base::Bind(&ModelTypeProcessor::DisconnectSync, processor_)); | |
| 59 } | |
| 60 | |
| 61 void ModelTypeProcessorProxy::OnCommitCompleted( | |
| 62 const sync_pb::DataTypeState& type_state, | |
| 63 const CommitResponseDataList& response_list) { | |
| 64 processor_task_runner_->PostTask( | |
| 65 FROM_HERE, base::Bind(&ModelTypeProcessor::OnCommitCompleted, processor_, | |
| 66 type_state, response_list)); | |
| 67 } | |
| 68 | |
| 69 void ModelTypeProcessorProxy::OnUpdateReceived( | |
| 70 const sync_pb::DataTypeState& type_state, | |
| 71 const UpdateResponseDataList& updates) { | |
| 72 processor_task_runner_->PostTask( | |
| 73 FROM_HERE, base::Bind(&ModelTypeProcessor::OnUpdateReceived, processor_, | |
| 74 type_state, updates)); | |
| 75 } | |
| 76 | |
| 77 } // namespace | |
| 78 | |
| 79 SharedModelTypeProcessor::SharedModelTypeProcessor(syncer::ModelType type, | |
| 80 ModelTypeService* service) | |
| 81 : type_(type), | |
| 82 is_metadata_loaded_(false), | |
| 83 is_initial_pending_data_loaded_(false), | |
| 84 service_(service), | |
| 85 error_handler_(nullptr), | |
| 86 weak_ptr_factory_(this) { | |
| 87 DCHECK(service); | |
| 88 } | |
| 89 | |
| 90 SharedModelTypeProcessor::~SharedModelTypeProcessor() {} | |
| 91 | |
| 92 // static | |
| 93 std::unique_ptr<ModelTypeChangeProcessor> | |
| 94 SharedModelTypeProcessor::CreateAsChangeProcessor(syncer::ModelType type, | |
| 95 ModelTypeService* service) { | |
| 96 return std::unique_ptr<ModelTypeChangeProcessor>( | |
| 97 new SharedModelTypeProcessor(type, service)); | |
| 98 } | |
| 99 | |
| 100 void SharedModelTypeProcessor::OnSyncStarting( | |
| 101 syncer::DataTypeErrorHandler* error_handler, | |
| 102 const StartCallback& start_callback) { | |
| 103 DCHECK(CalledOnValidThread()); | |
| 104 DCHECK(start_callback_.is_null()); | |
| 105 DCHECK(!IsConnected()); | |
| 106 DCHECK(error_handler); | |
| 107 DVLOG(1) << "Sync is starting for " << ModelTypeToString(type_); | |
| 108 | |
| 109 error_handler_ = error_handler; | |
| 110 start_callback_ = start_callback; | |
| 111 ConnectIfReady(); | |
| 112 } | |
| 113 | |
| 114 void SharedModelTypeProcessor::OnMetadataLoaded( | |
| 115 syncer::SyncError error, | |
| 116 std::unique_ptr<MetadataBatch> batch) { | |
| 117 DCHECK(CalledOnValidThread()); | |
| 118 DCHECK(entities_.empty()); | |
| 119 DCHECK(!is_metadata_loaded_); | |
| 120 DCHECK(!IsConnected()); | |
| 121 | |
| 122 is_metadata_loaded_ = true; | |
| 123 // Flip this flag here to cover all cases where we don't need to load data. | |
| 124 is_initial_pending_data_loaded_ = true; | |
| 125 | |
| 126 if (error.IsSet()) { | |
| 127 start_error_ = error; | |
| 128 ConnectIfReady(); | |
| 129 return; | |
| 130 } | |
| 131 | |
| 132 if (batch->GetDataTypeState().initial_sync_done()) { | |
| 133 EntityMetadataMap metadata_map(batch->TakeAllMetadata()); | |
| 134 std::vector<std::string> entities_to_commit; | |
| 135 | |
| 136 for (auto it = metadata_map.begin(); it != metadata_map.end(); it++) { | |
| 137 std::unique_ptr<ProcessorEntityTracker> entity = | |
| 138 ProcessorEntityTracker::CreateFromMetadata(it->first, &it->second); | |
| 139 if (entity->RequiresCommitData()) { | |
| 140 entities_to_commit.push_back(entity->client_tag()); | |
| 141 } | |
| 142 entities_[entity->metadata().client_tag_hash()] = std::move(entity); | |
| 143 } | |
| 144 data_type_state_ = batch->GetDataTypeState(); | |
| 145 if (!entities_to_commit.empty()) { | |
| 146 is_initial_pending_data_loaded_ = false; | |
| 147 service_->GetData( | |
| 148 entities_to_commit, | |
| 149 base::Bind(&SharedModelTypeProcessor::OnInitialPendingDataLoaded, | |
| 150 weak_ptr_factory_.GetWeakPtr())); | |
| 151 } | |
| 152 } else { | |
| 153 // First time syncing; initialize metadata. | |
| 154 data_type_state_.mutable_progress_marker()->set_data_type_id( | |
| 155 GetSpecificsFieldNumberFromModelType(type_)); | |
| 156 } | |
| 157 | |
| 158 ConnectIfReady(); | |
| 159 } | |
| 160 | |
| 161 void SharedModelTypeProcessor::ConnectIfReady() { | |
| 162 DCHECK(CalledOnValidThread()); | |
| 163 if (!is_metadata_loaded_ || !is_initial_pending_data_loaded_ || | |
| 164 start_callback_.is_null()) { | |
| 165 return; | |
| 166 } | |
| 167 | |
| 168 std::unique_ptr<ActivationContext> activation_context; | |
| 169 | |
| 170 if (!start_error_.IsSet()) { | |
| 171 activation_context = base::WrapUnique(new ActivationContext); | |
| 172 activation_context->data_type_state = data_type_state_; | |
| 173 activation_context->type_processor = base::WrapUnique( | |
| 174 new ModelTypeProcessorProxy(weak_ptr_factory_.GetWeakPtr(), | |
| 175 base::ThreadTaskRunnerHandle::Get())); | |
| 176 } | |
| 177 | |
| 178 start_callback_.Run(start_error_, std::move(activation_context)); | |
| 179 start_callback_.Reset(); | |
| 180 } | |
| 181 | |
| 182 bool SharedModelTypeProcessor::IsAllowingChanges() const { | |
| 183 return is_metadata_loaded_; | |
| 184 } | |
| 185 | |
| 186 bool SharedModelTypeProcessor::IsConnected() const { | |
| 187 DCHECK(CalledOnValidThread()); | |
| 188 return !!worker_; | |
| 189 } | |
| 190 | |
| 191 void SharedModelTypeProcessor::DisableSync() { | |
| 192 DCHECK(CalledOnValidThread()); | |
| 193 std::unique_ptr<MetadataChangeList> change_list = | |
| 194 service_->CreateMetadataChangeList(); | |
| 195 for (auto it = entities_.begin(); it != entities_.end(); ++it) { | |
| 196 change_list->ClearMetadata(it->second->client_tag()); | |
| 197 } | |
| 198 change_list->ClearDataTypeState(); | |
| 199 // Nothing to do if this fails, so just ignore the error it might return. | |
| 200 service_->ApplySyncChanges(std::move(change_list), EntityChangeList()); | |
| 201 } | |
| 202 | |
| 203 syncer::SyncError SharedModelTypeProcessor::CreateAndUploadError( | |
| 204 const tracked_objects::Location& location, | |
| 205 const std::string& message) { | |
| 206 if (error_handler_) { | |
| 207 return error_handler_->CreateAndUploadError(location, message, type_); | |
| 208 } else { | |
| 209 return syncer::SyncError(location, syncer::SyncError::DATATYPE_ERROR, | |
| 210 message, type_); | |
| 211 } | |
| 212 } | |
| 213 | |
| 214 void SharedModelTypeProcessor::ConnectSync( | |
| 215 std::unique_ptr<CommitQueue> worker) { | |
| 216 DCHECK(CalledOnValidThread()); | |
| 217 DVLOG(1) << "Successfully connected " << ModelTypeToString(type_); | |
| 218 | |
| 219 worker_ = std::move(worker); | |
| 220 | |
| 221 FlushPendingCommitRequests(); | |
| 222 } | |
| 223 | |
| 224 void SharedModelTypeProcessor::DisconnectSync() { | |
| 225 DCHECK(CalledOnValidThread()); | |
| 226 DCHECK(IsConnected()); | |
| 227 | |
| 228 DVLOG(1) << "Disconnecting sync for " << ModelTypeToString(type_); | |
| 229 weak_ptr_factory_.InvalidateWeakPtrs(); | |
| 230 worker_.reset(); | |
| 231 | |
| 232 for (auto it = entities_.begin(); it != entities_.end(); ++it) { | |
| 233 it->second->ClearTransientSyncState(); | |
| 234 } | |
| 235 } | |
| 236 | |
| 237 void SharedModelTypeProcessor::Put(const std::string& tag, | |
| 238 std::unique_ptr<EntityData> data, | |
| 239 MetadataChangeList* metadata_change_list) { | |
| 240 DCHECK(IsAllowingChanges()); | |
| 241 DCHECK(data.get()); | |
| 242 DCHECK(!data->is_deleted()); | |
| 243 DCHECK(!data->non_unique_name.empty()); | |
| 244 DCHECK_EQ(type_, syncer::GetModelTypeFromSpecifics(data->specifics)); | |
| 245 | |
| 246 if (!data_type_state_.initial_sync_done()) { | |
| 247 // Ignore changes before the initial sync is done. | |
| 248 return; | |
| 249 } | |
| 250 | |
| 251 // Fill in some data. | |
| 252 data->client_tag_hash = GetHashForTag(tag); | |
| 253 if (data->modification_time.is_null()) { | |
| 254 data->modification_time = base::Time::Now(); | |
| 255 } | |
| 256 | |
| 257 ProcessorEntityTracker* entity = GetEntityForTagHash(data->client_tag_hash); | |
| 258 | |
| 259 if (entity == nullptr) { | |
| 260 // The service is creating a new entity. | |
| 261 if (data->creation_time.is_null()) { | |
| 262 data->creation_time = data->modification_time; | |
| 263 } | |
| 264 entity = CreateEntity(tag, *data); | |
| 265 } else if (entity->MatchesData(*data)) { | |
| 266 // Ignore changes that don't actually change anything. | |
| 267 return; | |
| 268 } | |
| 269 | |
| 270 entity->MakeLocalChange(std::move(data)); | |
| 271 metadata_change_list->UpdateMetadata(tag, entity->metadata()); | |
| 272 | |
| 273 FlushPendingCommitRequests(); | |
| 274 } | |
| 275 | |
| 276 void SharedModelTypeProcessor::Delete( | |
| 277 const std::string& tag, | |
| 278 MetadataChangeList* metadata_change_list) { | |
| 279 DCHECK(IsAllowingChanges()); | |
| 280 | |
| 281 if (!data_type_state_.initial_sync_done()) { | |
| 282 // Ignore changes before the initial sync is done. | |
| 283 return; | |
| 284 } | |
| 285 | |
| 286 ProcessorEntityTracker* entity = GetEntityForTag(tag); | |
| 287 if (entity == nullptr) { | |
| 288 // That's unusual, but not necessarily a bad thing. | |
| 289 // Missing is as good as deleted as far as the model is concerned. | |
| 290 DLOG(WARNING) << "Attempted to delete missing item." | |
| 291 << " client tag: " << tag; | |
| 292 return; | |
| 293 } | |
| 294 | |
| 295 entity->Delete(); | |
| 296 | |
| 297 metadata_change_list->UpdateMetadata(tag, entity->metadata()); | |
| 298 FlushPendingCommitRequests(); | |
| 299 } | |
| 300 | |
| 301 void SharedModelTypeProcessor::FlushPendingCommitRequests() { | |
| 302 CommitRequestDataList commit_requests; | |
| 303 | |
| 304 // Don't bother sending anything if there's no one to send to. | |
| 305 if (!IsConnected()) | |
| 306 return; | |
| 307 | |
| 308 // Don't send anything if the type is not ready to handle commits. | |
| 309 if (!data_type_state_.initial_sync_done()) | |
| 310 return; | |
| 311 | |
| 312 // TODO(rlarocque): Do something smarter than iterate here. | |
| 313 for (auto it = entities_.begin(); it != entities_.end(); ++it) { | |
| 314 ProcessorEntityTracker* entity = it->second.get(); | |
| 315 if (entity->RequiresCommitRequest() && !entity->RequiresCommitData()) { | |
| 316 CommitRequestData request; | |
| 317 entity->InitializeCommitRequestData(&request); | |
| 318 commit_requests.push_back(request); | |
| 319 } | |
| 320 } | |
| 321 | |
| 322 if (!commit_requests.empty()) | |
| 323 worker_->EnqueueForCommit(commit_requests); | |
| 324 } | |
| 325 | |
| 326 void SharedModelTypeProcessor::OnCommitCompleted( | |
| 327 const sync_pb::DataTypeState& type_state, | |
| 328 const CommitResponseDataList& response_list) { | |
| 329 std::unique_ptr<MetadataChangeList> change_list = | |
| 330 service_->CreateMetadataChangeList(); | |
| 331 | |
| 332 data_type_state_ = type_state; | |
| 333 change_list->UpdateDataTypeState(data_type_state_); | |
| 334 | |
| 335 for (const CommitResponseData& data : response_list) { | |
| 336 ProcessorEntityTracker* entity = GetEntityForTagHash(data.client_tag_hash); | |
| 337 if (entity == nullptr) { | |
| 338 NOTREACHED() << "Received commit response for missing item." | |
| 339 << " type: " << type_ | |
| 340 << " client_tag_hash: " << data.client_tag_hash; | |
| 341 continue; | |
| 342 } | |
| 343 | |
| 344 entity->ReceiveCommitResponse(data); | |
| 345 | |
| 346 if (entity->CanClearMetadata()) { | |
| 347 change_list->ClearMetadata(entity->client_tag()); | |
| 348 entities_.erase(entity->metadata().client_tag_hash()); | |
| 349 } else { | |
| 350 change_list->UpdateMetadata(entity->client_tag(), entity->metadata()); | |
| 351 } | |
| 352 } | |
| 353 | |
| 354 syncer::SyncError error = | |
| 355 service_->ApplySyncChanges(std::move(change_list), EntityChangeList()); | |
| 356 if (error.IsSet()) { | |
| 357 error_handler_->OnSingleDataTypeUnrecoverableError(error); | |
| 358 } | |
| 359 } | |
| 360 | |
| 361 void SharedModelTypeProcessor::OnUpdateReceived( | |
| 362 const sync_pb::DataTypeState& data_type_state, | |
| 363 const UpdateResponseDataList& updates) { | |
| 364 if (!data_type_state_.initial_sync_done()) { | |
| 365 OnInitialUpdateReceived(data_type_state, updates); | |
| 366 return; | |
| 367 } | |
| 368 | |
| 369 std::unique_ptr<MetadataChangeList> metadata_changes = | |
| 370 service_->CreateMetadataChangeList(); | |
| 371 EntityChangeList entity_changes; | |
| 372 | |
| 373 metadata_changes->UpdateDataTypeState(data_type_state); | |
| 374 bool got_new_encryption_requirements = | |
| 375 data_type_state_.encryption_key_name() != | |
| 376 data_type_state.encryption_key_name(); | |
| 377 data_type_state_ = data_type_state; | |
| 378 | |
| 379 // If new encryption requirements come from the server, the entities that are | |
| 380 // in |updates| will be recorded here so they can be ignored during the | |
| 381 // re-encryption phase at the end. | |
| 382 std::unordered_set<std::string> already_updated; | |
| 383 | |
| 384 for (const UpdateResponseData& update : updates) { | |
| 385 ProcessorEntityTracker* entity = ProcessUpdate(update, &entity_changes); | |
| 386 | |
| 387 if (!entity) { | |
| 388 // The update should be ignored. | |
| 389 continue; | |
| 390 } | |
| 391 | |
| 392 if (entity->CanClearMetadata()) { | |
| 393 metadata_changes->ClearMetadata(entity->client_tag()); | |
| 394 entities_.erase(entity->metadata().client_tag_hash()); | |
| 395 } else { | |
| 396 metadata_changes->UpdateMetadata(entity->client_tag(), | |
| 397 entity->metadata()); | |
| 398 } | |
| 399 | |
| 400 if (got_new_encryption_requirements) { | |
| 401 already_updated.insert(entity->client_tag()); | |
| 402 } | |
| 403 } | |
| 404 | |
| 405 if (got_new_encryption_requirements) { | |
| 406 RecommitAllForEncryption(already_updated, metadata_changes.get()); | |
| 407 } | |
| 408 | |
| 409 // Inform the service of the new or updated data. | |
| 410 syncer::SyncError error = | |
| 411 service_->ApplySyncChanges(std::move(metadata_changes), entity_changes); | |
| 412 | |
| 413 if (error.IsSet()) { | |
| 414 error_handler_->OnSingleDataTypeUnrecoverableError(error); | |
| 415 } else { | |
| 416 // There may be new reasons to commit by the time this function is done. | |
| 417 FlushPendingCommitRequests(); | |
| 418 } | |
| 419 } | |
| 420 | |
| 421 ProcessorEntityTracker* SharedModelTypeProcessor::ProcessUpdate( | |
| 422 const UpdateResponseData& update, | |
| 423 EntityChangeList* entity_changes) { | |
| 424 const EntityData& data = update.entity.value(); | |
| 425 const std::string& client_tag_hash = data.client_tag_hash; | |
| 426 ProcessorEntityTracker* entity = GetEntityForTagHash(client_tag_hash); | |
| 427 if (entity == nullptr) { | |
| 428 if (data.is_deleted()) { | |
| 429 DLOG(WARNING) << "Received remote delete for a non-existing item." | |
| 430 << " client_tag_hash: " << client_tag_hash; | |
| 431 return nullptr; | |
| 432 } | |
| 433 | |
| 434 entity = CreateEntity(data); | |
| 435 entity_changes->push_back( | |
| 436 EntityChange::CreateAdd(entity->client_tag(), update.entity)); | |
| 437 entity->RecordAcceptedUpdate(update); | |
| 438 } else if (entity->UpdateIsReflection(update.response_version)) { | |
| 439 // Seen this update before; just ignore it. | |
| 440 return nullptr; | |
| 441 } else if (entity->IsUnsynced()) { | |
| 442 ConflictResolution::Type resolution_type = | |
| 443 ResolveConflict(update, entity, entity_changes); | |
| 444 UMA_HISTOGRAM_ENUMERATION("Sync.ResolveConflict", resolution_type, | |
| 445 ConflictResolution::TYPE_SIZE); | |
| 446 } else if (data.is_deleted()) { | |
| 447 // The entity was deleted; inform the service. Note that the local data | |
| 448 // can never be deleted at this point because it would have either been | |
| 449 // acked (the add case) or pending (the conflict case). | |
| 450 DCHECK(!entity->metadata().is_deleted()); | |
| 451 entity_changes->push_back(EntityChange::CreateDelete(entity->client_tag())); | |
| 452 entity->RecordAcceptedUpdate(update); | |
| 453 } else if (!entity->MatchesData(data)) { | |
| 454 // Specifics have changed, so update the service. | |
| 455 entity_changes->push_back( | |
| 456 EntityChange::CreateUpdate(entity->client_tag(), update.entity)); | |
| 457 entity->RecordAcceptedUpdate(update); | |
| 458 } else { | |
| 459 // No data change; still record that the update was received. | |
| 460 entity->RecordAcceptedUpdate(update); | |
| 461 } | |
| 462 | |
| 463 // If the received entity has out of date encryption, we schedule another | |
| 464 // commit to fix it. | |
| 465 if (data_type_state_.encryption_key_name() != update.encryption_key_name) { | |
| 466 DVLOG(2) << ModelTypeToString(type_) << ": Requesting re-encrypt commit " | |
| 467 << update.encryption_key_name << " -> " | |
| 468 << data_type_state_.encryption_key_name(); | |
| 469 | |
| 470 entity->IncrementSequenceNumber(); | |
| 471 if (entity->RequiresCommitData()) { | |
| 472 // If there is no pending commit data, then either this update wasn't | |
| 473 // in conflict or the remote data won; either way the remote data is | |
| 474 // the right data to re-queue for commit. | |
| 475 entity->CacheCommitData(update.entity); | |
| 476 } | |
| 477 } | |
| 478 | |
| 479 return entity; | |
| 480 } | |
| 481 | |
| 482 ConflictResolution::Type SharedModelTypeProcessor::ResolveConflict( | |
| 483 const UpdateResponseData& update, | |
| 484 ProcessorEntityTracker* entity, | |
| 485 EntityChangeList* changes) { | |
| 486 const EntityData& remote_data = update.entity.value(); | |
| 487 | |
| 488 ConflictResolution::Type resolution_type = ConflictResolution::TYPE_SIZE; | |
| 489 std::unique_ptr<EntityData> new_data; | |
| 490 | |
| 491 // Determine the type of resolution. | |
| 492 if (entity->MatchesData(remote_data)) { | |
| 493 // The changes are identical so there isn't a real conflict. | |
| 494 resolution_type = ConflictResolution::CHANGES_MATCH; | |
| 495 } else if (entity->RequiresCommitData() || | |
| 496 entity->MatchesBaseData(entity->commit_data().value())) { | |
| 497 // If commit data needs to be loaded at this point, it can only be due to a | |
| 498 // re-encryption request. If the commit data matches the base data, it also | |
| 499 // must be a re-encryption request. Either way there's no real local change | |
| 500 // and the remote data should win. | |
| 501 resolution_type = ConflictResolution::IGNORE_LOCAL_ENCRYPTION; | |
| 502 } else if (entity->MatchesBaseData(remote_data)) { | |
| 503 // The remote data isn't actually changing from the last remote data that | |
| 504 // was seen, so it must have been a re-encryption and can be ignored. | |
| 505 resolution_type = ConflictResolution::IGNORE_REMOTE_ENCRYPTION; | |
| 506 } else { | |
| 507 // There's a real data conflict here; let the service resolve it. | |
| 508 ConflictResolution resolution = | |
| 509 service_->ResolveConflict(entity->commit_data().value(), remote_data); | |
| 510 resolution_type = resolution.type(); | |
| 511 new_data = resolution.ExtractData(); | |
| 512 } | |
| 513 | |
| 514 // Apply the resolution. | |
| 515 switch (resolution_type) { | |
| 516 case ConflictResolution::CHANGES_MATCH: | |
| 517 // Record the update and squash the pending commit. | |
| 518 entity->RecordForcedUpdate(update); | |
| 519 break; | |
| 520 case ConflictResolution::USE_LOCAL: | |
| 521 case ConflictResolution::IGNORE_REMOTE_ENCRYPTION: | |
| 522 // Record that we received the update from the server but leave the | |
| 523 // pending commit intact. | |
| 524 entity->RecordIgnoredUpdate(update); | |
| 525 break; | |
| 526 case ConflictResolution::USE_REMOTE: | |
| 527 case ConflictResolution::IGNORE_LOCAL_ENCRYPTION: | |
| 528 // Squash the pending commit. | |
| 529 entity->RecordForcedUpdate(update); | |
| 530 // Update client data to match server. | |
| 531 changes->push_back( | |
| 532 EntityChange::CreateUpdate(entity->client_tag(), update.entity)); | |
| 533 break; | |
| 534 case ConflictResolution::USE_NEW: | |
| 535 // Record that we received the update. | |
| 536 entity->RecordIgnoredUpdate(update); | |
| 537 // Make a new pending commit to update the server. | |
| 538 entity->MakeLocalChange(std::move(new_data)); | |
| 539 // Update the client with the new entity. | |
| 540 changes->push_back(EntityChange::CreateUpdate(entity->client_tag(), | |
| 541 entity->commit_data())); | |
| 542 break; | |
| 543 case ConflictResolution::TYPE_SIZE: | |
| 544 NOTREACHED(); | |
| 545 break; | |
| 546 } | |
| 547 DCHECK(!new_data); | |
| 548 | |
| 549 return resolution_type; | |
| 550 } | |
| 551 | |
| 552 void SharedModelTypeProcessor::RecommitAllForEncryption( | |
| 553 std::unordered_set<std::string> already_updated, | |
| 554 MetadataChangeList* metadata_changes) { | |
| 555 ModelTypeService::ClientTagList entities_needing_data; | |
| 556 | |
| 557 for (auto it = entities_.begin(); it != entities_.end(); ++it) { | |
| 558 ProcessorEntityTracker* entity = it->second.get(); | |
| 559 if (already_updated.find(entity->client_tag()) != already_updated.end()) { | |
| 560 continue; | |
| 561 } | |
| 562 entity->IncrementSequenceNumber(); | |
| 563 if (entity->RequiresCommitData()) { | |
| 564 entities_needing_data.push_back(entity->client_tag()); | |
| 565 } | |
| 566 metadata_changes->UpdateMetadata(entity->client_tag(), entity->metadata()); | |
| 567 } | |
| 568 | |
| 569 if (!entities_needing_data.empty()) { | |
| 570 service_->GetData( | |
| 571 entities_needing_data, | |
| 572 base::Bind(&SharedModelTypeProcessor::OnDataLoadedForReEncryption, | |
| 573 weak_ptr_factory_.GetWeakPtr())); | |
| 574 } | |
| 575 } | |
| 576 | |
| 577 void SharedModelTypeProcessor::OnInitialUpdateReceived( | |
| 578 const sync_pb::DataTypeState& data_type_state, | |
| 579 const UpdateResponseDataList& updates) { | |
| 580 DCHECK(entities_.empty()); | |
| 581 // Ensure that initial sync was not already done and that the worker | |
| 582 // correctly marked initial sync as done for this update. | |
| 583 DCHECK(!data_type_state_.initial_sync_done()); | |
| 584 DCHECK(data_type_state.initial_sync_done()); | |
| 585 | |
| 586 std::unique_ptr<MetadataChangeList> metadata_changes = | |
| 587 service_->CreateMetadataChangeList(); | |
| 588 EntityDataMap data_map; | |
| 589 | |
| 590 data_type_state_ = data_type_state; | |
| 591 metadata_changes->UpdateDataTypeState(data_type_state_); | |
| 592 | |
| 593 for (const UpdateResponseData& update : updates) { | |
| 594 ProcessorEntityTracker* entity = CreateEntity(update.entity.value()); | |
| 595 const std::string& tag = entity->client_tag(); | |
| 596 entity->RecordAcceptedUpdate(update); | |
| 597 metadata_changes->UpdateMetadata(tag, entity->metadata()); | |
| 598 data_map[tag] = update.entity; | |
| 599 } | |
| 600 | |
| 601 // Let the service handle associating and merging the data. | |
| 602 syncer::SyncError error = | |
| 603 service_->MergeSyncData(std::move(metadata_changes), data_map); | |
| 604 | |
| 605 if (error.IsSet()) { | |
| 606 error_handler_->OnSingleDataTypeUnrecoverableError(error); | |
| 607 } else { | |
| 608 // We may have new reasons to commit by the time this function is done. | |
| 609 FlushPendingCommitRequests(); | |
| 610 } | |
| 611 } | |
| 612 | |
| 613 void SharedModelTypeProcessor::OnInitialPendingDataLoaded( | |
| 614 syncer::SyncError error, | |
| 615 std::unique_ptr<DataBatch> data_batch) { | |
| 616 DCHECK(!is_initial_pending_data_loaded_); | |
| 617 | |
| 618 if (error.IsSet()) { | |
| 619 start_error_ = error; | |
| 620 } else { | |
| 621 ConsumeDataBatch(std::move(data_batch)); | |
| 622 } | |
| 623 | |
| 624 is_initial_pending_data_loaded_ = true; | |
| 625 ConnectIfReady(); | |
| 626 } | |
| 627 | |
| 628 void SharedModelTypeProcessor::OnDataLoadedForReEncryption( | |
| 629 syncer::SyncError error, | |
| 630 std::unique_ptr<DataBatch> data_batch) { | |
| 631 DCHECK(is_initial_pending_data_loaded_); | |
| 632 | |
| 633 if (error.IsSet()) { | |
| 634 error_handler_->OnSingleDataTypeUnrecoverableError(error); | |
| 635 return; | |
| 636 } | |
| 637 | |
| 638 ConsumeDataBatch(std::move(data_batch)); | |
| 639 FlushPendingCommitRequests(); | |
| 640 } | |
| 641 | |
| 642 void SharedModelTypeProcessor::ConsumeDataBatch( | |
| 643 std::unique_ptr<DataBatch> data_batch) { | |
| 644 while (data_batch->HasNext()) { | |
| 645 TagAndData data = data_batch->Next(); | |
| 646 ProcessorEntityTracker* entity = GetEntityForTag(data.first); | |
| 647 // If the entity wasn't deleted or updated with new commit. | |
| 648 if (entity != nullptr && entity->RequiresCommitData()) { | |
| 649 entity->CacheCommitData(data.second.get()); | |
| 650 } | |
| 651 } | |
| 652 } | |
| 653 | |
| 654 std::string SharedModelTypeProcessor::GetHashForTag(const std::string& tag) { | |
| 655 return syncer::syncable::GenerateSyncableHash(type_, tag); | |
| 656 } | |
| 657 | |
| 658 ProcessorEntityTracker* SharedModelTypeProcessor::GetEntityForTag( | |
| 659 const std::string& tag) { | |
| 660 return GetEntityForTagHash(GetHashForTag(tag)); | |
| 661 } | |
| 662 | |
| 663 ProcessorEntityTracker* SharedModelTypeProcessor::GetEntityForTagHash( | |
| 664 const std::string& tag_hash) { | |
| 665 auto it = entities_.find(tag_hash); | |
| 666 return it != entities_.end() ? it->second.get() : nullptr; | |
| 667 } | |
| 668 | |
| 669 ProcessorEntityTracker* SharedModelTypeProcessor::CreateEntity( | |
| 670 const std::string& tag, | |
| 671 const EntityData& data) { | |
| 672 DCHECK(entities_.find(data.client_tag_hash) == entities_.end()); | |
| 673 std::unique_ptr<ProcessorEntityTracker> entity = | |
| 674 ProcessorEntityTracker::CreateNew(tag, data.client_tag_hash, data.id, | |
| 675 data.creation_time); | |
| 676 ProcessorEntityTracker* entity_ptr = entity.get(); | |
| 677 entities_[data.client_tag_hash] = std::move(entity); | |
| 678 return entity_ptr; | |
| 679 } | |
| 680 | |
| 681 ProcessorEntityTracker* SharedModelTypeProcessor::CreateEntity( | |
| 682 const EntityData& data) { | |
| 683 // Let the service define |client_tag| based on the entity data. | |
| 684 const std::string tag = service_->GetClientTag(data); | |
| 685 // This constraint may be relaxed in the future. | |
| 686 DCHECK_EQ(data.client_tag_hash, GetHashForTag(tag)); | |
| 687 return CreateEntity(tag, data); | |
| 688 } | |
| 689 | |
| 690 } // namespace syncer_v2 | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2130453004:
[Sync] Move //sync to //components/sync. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master