| // Copyright 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "components/sync_driver/glue/sync_backend_registrar.h" |
| |
| #include <cstddef> |
| #include <utility> |
| |
| #include "base/compiler_specific.h" |
| #include "base/logging.h" |
| #include "base/message_loop/message_loop.h" |
| #include "components/sync_driver/change_processor.h" |
| #include "components/sync_driver/sync_client.h" |
| #include "sync/internal_api/public/user_share.h" |
| |
| namespace browser_sync { |
| |
| SyncBackendRegistrar::SyncBackendRegistrar( |
| const std::string& name, |
| sync_driver::SyncClient* sync_client, |
| scoped_ptr<base::Thread> sync_thread, |
| const scoped_refptr<base::SingleThreadTaskRunner>& ui_thread, |
| const scoped_refptr<base::SingleThreadTaskRunner>& db_thread, |
| const scoped_refptr<base::SingleThreadTaskRunner>& file_thread) |
| : name_(name), |
| sync_client_(sync_client), |
| ui_thread_(ui_thread), |
| db_thread_(db_thread), |
| file_thread_(file_thread) { |
| DCHECK(ui_thread_->BelongsToCurrentThread()); |
| DCHECK(sync_client_); |
| |
| sync_thread_ = std::move(sync_thread); |
| if (!sync_thread_) { |
| sync_thread_.reset(new base::Thread("Chrome_SyncThread")); |
| base::Thread::Options options; |
| options.timer_slack = base::TIMER_SLACK_MAXIMUM; |
| CHECK(sync_thread_->StartWithOptions(options)); |
| } |
| |
| MaybeAddWorker(syncer::GROUP_DB); |
| MaybeAddWorker(syncer::GROUP_FILE); |
| MaybeAddWorker(syncer::GROUP_UI); |
| MaybeAddWorker(syncer::GROUP_PASSIVE); |
| MaybeAddWorker(syncer::GROUP_HISTORY); |
| MaybeAddWorker(syncer::GROUP_PASSWORD); |
| |
| // Must have at least one worker for SyncBackendRegistrar to be destroyed |
| // correctly, as it is destroyed after the last worker dies. |
| DCHECK_GT(workers_.size(), 0u); |
| } |
| |
| void SyncBackendRegistrar::SetInitialTypes(syncer::ModelTypeSet initial_types) { |
| base::AutoLock lock(lock_); |
| |
| // This function should be called only once, shortly after construction. The |
| // routing info at that point is expected to be empty. |
| DCHECK(routing_info_.empty()); |
| |
| // Set our initial state to reflect the current status of the sync directory. |
| // This will ensure that our calculations in ConfigureDataTypes() will always |
| // return correct results. |
| for (syncer::ModelTypeSet::Iterator it = initial_types.First(); it.Good(); |
| it.Inc()) { |
| routing_info_[it.Get()] = syncer::GROUP_PASSIVE; |
| } |
| |
| if (!workers_.count(syncer::GROUP_HISTORY)) { |
| LOG_IF(WARNING, initial_types.Has(syncer::TYPED_URLS)) |
| << "History store disabled, cannot sync Omnibox History"; |
| routing_info_.erase(syncer::TYPED_URLS); |
| } |
| |
| if (!workers_.count(syncer::GROUP_PASSWORD)) { |
| LOG_IF(WARNING, initial_types.Has(syncer::PASSWORDS)) |
| << "Password store not initialized, cannot sync passwords"; |
| routing_info_.erase(syncer::PASSWORDS); |
| } |
| |
| last_configured_types_ = syncer::GetRoutingInfoTypes(routing_info_); |
| } |
| |
| bool SyncBackendRegistrar::IsNigoriEnabled() const { |
| DCHECK(ui_thread_->BelongsToCurrentThread()); |
| base::AutoLock lock(lock_); |
| return routing_info_.find(syncer::NIGORI) != routing_info_.end(); |
| } |
| |
| syncer::ModelTypeSet SyncBackendRegistrar::ConfigureDataTypes( |
| syncer::ModelTypeSet types_to_add, |
| syncer::ModelTypeSet types_to_remove) { |
| DCHECK(Intersection(types_to_add, types_to_remove).Empty()); |
| syncer::ModelTypeSet filtered_types_to_add = types_to_add; |
| if (workers_.count(syncer::GROUP_HISTORY) == 0) { |
| LOG(WARNING) << "No history worker -- removing TYPED_URLS"; |
| filtered_types_to_add.Remove(syncer::TYPED_URLS); |
| } |
| if (workers_.count(syncer::GROUP_PASSWORD) == 0) { |
| LOG(WARNING) << "No password worker -- removing PASSWORDS"; |
| filtered_types_to_add.Remove(syncer::PASSWORDS); |
| } |
| |
| base::AutoLock lock(lock_); |
| syncer::ModelTypeSet newly_added_types; |
| for (syncer::ModelTypeSet::Iterator it = filtered_types_to_add.First(); |
| it.Good(); it.Inc()) { |
| // Add a newly specified data type as syncer::GROUP_PASSIVE into the |
| // routing_info, if it does not already exist. |
| if (routing_info_.count(it.Get()) == 0) { |
| routing_info_[it.Get()] = syncer::GROUP_PASSIVE; |
| newly_added_types.Put(it.Get()); |
| } |
| } |
| for (syncer::ModelTypeSet::Iterator it = types_to_remove.First(); it.Good(); |
| it.Inc()) { |
| routing_info_.erase(it.Get()); |
| } |
| |
| // TODO(akalin): Use SVLOG/SLOG if we add any more logging. |
| DVLOG(1) << name_ << ": Adding types " |
| << syncer::ModelTypeSetToString(types_to_add) |
| << " (with newly-added types " |
| << syncer::ModelTypeSetToString(newly_added_types) |
| << ") and removing types " |
| << syncer::ModelTypeSetToString(types_to_remove) |
| << " to get new routing info " |
| << syncer::ModelSafeRoutingInfoToString(routing_info_); |
| last_configured_types_ = syncer::GetRoutingInfoTypes(routing_info_); |
| |
| return newly_added_types; |
| } |
| |
| syncer::ModelTypeSet SyncBackendRegistrar::GetLastConfiguredTypes() const { |
| return last_configured_types_; |
| } |
| |
| void SyncBackendRegistrar::RequestWorkerStopOnUIThread() { |
| DCHECK(ui_thread_->BelongsToCurrentThread()); |
| base::AutoLock lock(lock_); |
| for (WorkerMap::const_iterator it = workers_.begin(); it != workers_.end(); |
| ++it) { |
| it->second->RequestStop(); |
| } |
| } |
| |
| void SyncBackendRegistrar::ActivateDataType( |
| syncer::ModelType type, |
| syncer::ModelSafeGroup group, |
| sync_driver::ChangeProcessor* change_processor, |
| syncer::UserShare* user_share) { |
| DVLOG(1) << "Activate: " << syncer::ModelTypeToString(type); |
| |
| base::AutoLock lock(lock_); |
| // Ensure that the given data type is in the PASSIVE group. |
| syncer::ModelSafeRoutingInfo::iterator i = routing_info_.find(type); |
| DCHECK(i != routing_info_.end()); |
| DCHECK_EQ(i->second, syncer::GROUP_PASSIVE); |
| routing_info_[type] = group; |
| |
| // Add the data type's change processor to the list of change |
| // processors so it can receive updates. |
| DCHECK_EQ(processors_.count(type), 0U); |
| processors_[type] = change_processor; |
| |
| // Start the change processor. |
| change_processor->Start(user_share); |
| DCHECK(GetProcessorUnsafe(type)); |
| } |
| |
| void SyncBackendRegistrar::DeactivateDataType(syncer::ModelType type) { |
| DVLOG(1) << "Deactivate: " << syncer::ModelTypeToString(type); |
| |
| DCHECK(ui_thread_->BelongsToCurrentThread() || IsControlType(type)); |
| base::AutoLock lock(lock_); |
| |
| routing_info_.erase(type); |
| ignore_result(processors_.erase(type)); |
| DCHECK(!GetProcessorUnsafe(type)); |
| } |
| |
| bool SyncBackendRegistrar::IsTypeActivatedForTest( |
| syncer::ModelType type) const { |
| return GetProcessor(type) != NULL; |
| } |
| |
| void SyncBackendRegistrar::OnChangesApplied( |
| syncer::ModelType model_type, |
| int64_t model_version, |
| const syncer::BaseTransaction* trans, |
| const syncer::ImmutableChangeRecordList& changes) { |
| sync_driver::ChangeProcessor* processor = GetProcessor(model_type); |
| if (!processor) |
| return; |
| |
| processor->ApplyChangesFromSyncModel(trans, model_version, changes); |
| } |
| |
| void SyncBackendRegistrar::OnChangesComplete(syncer::ModelType model_type) { |
| sync_driver::ChangeProcessor* processor = GetProcessor(model_type); |
| if (!processor) |
| return; |
| |
| // This call just notifies the processor that it can commit; it |
| // already buffered any changes it plans to makes so needs no |
| // further information. |
| processor->CommitChangesFromSyncModel(); |
| } |
| |
| void SyncBackendRegistrar::GetWorkers( |
| std::vector<scoped_refptr<syncer::ModelSafeWorker>>* out) { |
| base::AutoLock lock(lock_); |
| out->clear(); |
| for (WorkerMap::const_iterator it = workers_.begin(); it != workers_.end(); |
| ++it) { |
| out->push_back(it->second.get()); |
| } |
| } |
| |
| void SyncBackendRegistrar::GetModelSafeRoutingInfo( |
| syncer::ModelSafeRoutingInfo* out) { |
| base::AutoLock lock(lock_); |
| syncer::ModelSafeRoutingInfo copy(routing_info_); |
| out->swap(copy); |
| } |
| |
| sync_driver::ChangeProcessor* SyncBackendRegistrar::GetProcessor( |
| syncer::ModelType type) const { |
| base::AutoLock lock(lock_); |
| sync_driver::ChangeProcessor* processor = GetProcessorUnsafe(type); |
| if (!processor) |
| return NULL; |
| |
| // We can only check if |processor| exists, as otherwise the type is |
| // mapped to syncer::GROUP_PASSIVE. |
| CHECK(IsCurrentThreadSafeForModel(type)); |
| return processor; |
| } |
| |
| sync_driver::ChangeProcessor* SyncBackendRegistrar::GetProcessorUnsafe( |
| syncer::ModelType type) const { |
| lock_.AssertAcquired(); |
| std::map<syncer::ModelType, sync_driver::ChangeProcessor*>::const_iterator |
| it = processors_.find(type); |
| |
| // Until model association happens for a datatype, it will not |
| // appear in the processors list. During this time, it is OK to |
| // drop changes on the floor (since model association has not |
| // happened yet). When the data type is activated, model |
| // association takes place then the change processor is added to the |
| // |processors_| list. |
| if (it == processors_.end()) |
| return NULL; |
| |
| return it->second; |
| } |
| |
| bool SyncBackendRegistrar::IsCurrentThreadSafeForModel( |
| syncer::ModelType model_type) const { |
| lock_.AssertAcquired(); |
| return IsOnThreadForGroup(model_type, |
| GetGroupForModelType(model_type, routing_info_)); |
| } |
| |
| bool SyncBackendRegistrar::IsOnThreadForGroup( |
| syncer::ModelType type, |
| syncer::ModelSafeGroup group) const { |
| switch (group) { |
| case syncer::GROUP_PASSIVE: |
| return IsControlType(type); |
| case syncer::GROUP_UI: |
| return ui_thread_->BelongsToCurrentThread(); |
| case syncer::GROUP_DB: |
| return db_thread_->BelongsToCurrentThread(); |
| case syncer::GROUP_FILE: |
| return file_thread_->BelongsToCurrentThread(); |
| case syncer::GROUP_HISTORY: |
| // TODO(sync): How to check we're on the right thread? |
| return type == syncer::TYPED_URLS; |
| case syncer::GROUP_PASSWORD: |
| // TODO(sync): How to check we're on the right thread? |
| return type == syncer::PASSWORDS; |
| case syncer::MODEL_SAFE_GROUP_COUNT: |
| default: |
| return false; |
| } |
| } |
| |
| SyncBackendRegistrar::~SyncBackendRegistrar() { |
| DCHECK(workers_.empty()); |
| } |
| |
| void SyncBackendRegistrar::OnWorkerLoopDestroyed(syncer::ModelSafeGroup group) { |
| RemoveWorker(group); |
| } |
| |
| void SyncBackendRegistrar::MaybeAddWorker(syncer::ModelSafeGroup group) { |
| const scoped_refptr<syncer::ModelSafeWorker> worker = |
| sync_client_->CreateModelWorkerForGroup(group, this); |
| if (worker) { |
| DCHECK(workers_.find(group) == workers_.end()); |
| workers_[group] = worker; |
| workers_[group]->RegisterForLoopDestruction(); |
| } |
| } |
| |
| void SyncBackendRegistrar::OnWorkerUnregistrationDone( |
| syncer::ModelSafeGroup group) { |
| RemoveWorker(group); |
| } |
| |
| void SyncBackendRegistrar::RemoveWorker(syncer::ModelSafeGroup group) { |
| DVLOG(1) << "Remove " << ModelSafeGroupToString(group) << " worker."; |
| |
| bool last_worker = false; |
| { |
| base::AutoLock al(lock_); |
| WorkerMap::iterator it = workers_.find(group); |
| CHECK(it != workers_.end()); |
| stopped_workers_.push_back(it->second); |
| workers_.erase(it); |
| last_worker = workers_.empty(); |
| } |
| |
| if (last_worker) { |
| // Self-destruction after last worker. |
| DVLOG(1) << "Destroy registrar on loop of " |
| << ModelSafeGroupToString(group); |
| delete this; |
| } |
| } |
| |
| scoped_ptr<base::Thread> SyncBackendRegistrar::ReleaseSyncThread() { |
| return std::move(sync_thread_); |
| } |
| |
| void SyncBackendRegistrar::Shutdown() { |
| // All data types should have been deactivated by now. |
| DCHECK(processors_.empty()); |
| |
| // Unregister worker from observing loop destruction. |
| base::AutoLock al(lock_); |
| for (WorkerMap::iterator it = workers_.begin(); it != workers_.end(); ++it) { |
| it->second->UnregisterForLoopDestruction( |
| base::Bind(&SyncBackendRegistrar::OnWorkerUnregistrationDone, |
| base::Unretained(this))); |
| } |
| } |
| |
| base::Thread* SyncBackendRegistrar::sync_thread() { |
| return sync_thread_.get(); |
| } |
| |
| } // namespace browser_sync |