| // Copyright (c) 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 "sync/sessions/sync_session.h" |
| |
| #include <algorithm> |
| #include <iterator> |
| |
| #include "base/logging.h" |
| #include "sync/internal_api/public/base/model_type.h" |
| #include "sync/internal_api/public/engine/model_safe_worker.h" |
| #include "sync/syncable/directory.h" |
| |
| namespace syncer { |
| namespace sessions { |
| |
| namespace { |
| |
| std::set<ModelSafeGroup> ComputeEnabledGroups( |
| const ModelSafeRoutingInfo& routing_info, |
| const std::vector<ModelSafeWorker*>& workers) { |
| std::set<ModelSafeGroup> enabled_groups; |
| // Project the list of enabled types (i.e., types in the routing |
| // info) to a list of enabled groups. |
| for (ModelSafeRoutingInfo::const_iterator it = routing_info.begin(); |
| it != routing_info.end(); ++it) { |
| enabled_groups.insert(it->second); |
| } |
| // GROUP_PASSIVE is always enabled, since that's the group that |
| // top-level folders map to. |
| enabled_groups.insert(GROUP_PASSIVE); |
| if (DCHECK_IS_ON()) { |
| // We sometimes create dummy SyncSession objects (see |
| // SyncScheduler::InitialSnapshot) so don't check in that case. |
| if (!routing_info.empty() || !workers.empty()) { |
| std::set<ModelSafeGroup> groups_with_workers; |
| for (std::vector<ModelSafeWorker*>::const_iterator it = workers.begin(); |
| it != workers.end(); ++it) { |
| groups_with_workers.insert((*it)->GetModelSafeGroup()); |
| } |
| // All enabled groups should have a corresponding worker. |
| DCHECK(std::includes( |
| groups_with_workers.begin(), groups_with_workers.end(), |
| enabled_groups.begin(), enabled_groups.end())); |
| } |
| } |
| return enabled_groups; |
| } |
| |
| void PurgeStaleStates(ModelTypeInvalidationMap* original, |
| const ModelSafeRoutingInfo& routing_info) { |
| std::vector<ModelTypeInvalidationMap::iterator> iterators_to_delete; |
| for (ModelTypeInvalidationMap::iterator i = original->begin(); |
| i != original->end(); ++i) { |
| if (routing_info.end() == routing_info.find(i->first)) { |
| iterators_to_delete.push_back(i); |
| } |
| } |
| |
| for (std::vector<ModelTypeInvalidationMap::iterator>::iterator |
| it = iterators_to_delete.begin(); it != iterators_to_delete.end(); |
| ++it) { |
| original->erase(*it); |
| } |
| } |
| |
| } // namesepace |
| |
| SyncSession::SyncSession(SyncSessionContext* context, Delegate* delegate, |
| const SyncSourceInfo& source, |
| const ModelSafeRoutingInfo& routing_info, |
| const std::vector<ModelSafeWorker*>& workers) |
| : context_(context), |
| source_(source), |
| write_transaction_(NULL), |
| delegate_(delegate), |
| workers_(workers), |
| routing_info_(routing_info), |
| enabled_groups_(ComputeEnabledGroups(routing_info_, workers_)) { |
| status_controller_.reset(new StatusController(routing_info_)); |
| std::sort(workers_.begin(), workers_.end()); |
| } |
| |
| SyncSession::~SyncSession() {} |
| |
| void SyncSession::Coalesce(const SyncSession& session) { |
| if (context_ != session.context() || delegate_ != session.delegate_) { |
| NOTREACHED(); |
| return; |
| } |
| |
| // When we coalesce sessions, the sync update source gets overwritten with the |
| // most recent, while the type/state map gets merged. |
| CoalesceStates(&source_.types, session.source_.types); |
| source_.updates_source = session.source_.updates_source; |
| |
| std::vector<ModelSafeWorker*> temp; |
| std::set_union(workers_.begin(), workers_.end(), |
| session.workers_.begin(), session.workers_.end(), |
| std::back_inserter(temp)); |
| workers_.swap(temp); |
| |
| // We have to update the model safe routing info to the union. In case the |
| // same key is present in both pick the one from session. |
| for (ModelSafeRoutingInfo::const_iterator it = |
| session.routing_info_.begin(); |
| it != session.routing_info_.end(); |
| ++it) { |
| routing_info_[it->first] = it->second; |
| } |
| |
| // Now update enabled groups. |
| enabled_groups_ = ComputeEnabledGroups(routing_info_, workers_); |
| } |
| |
| void SyncSession::RebaseRoutingInfoWithLatest( |
| const ModelSafeRoutingInfo& routing_info, |
| const std::vector<ModelSafeWorker*>& workers) { |
| ModelSafeRoutingInfo temp_routing_info; |
| |
| // Take the intersection and also set the routing info(it->second) from the |
| // passed in session. |
| for (ModelSafeRoutingInfo::const_iterator it = |
| routing_info.begin(); it != routing_info.end(); |
| ++it) { |
| if (routing_info_.find(it->first) != routing_info_.end()) { |
| temp_routing_info[it->first] = it->second; |
| } |
| } |
| routing_info_.swap(temp_routing_info); |
| |
| PurgeStaleStates(&source_.types, routing_info); |
| |
| // Now update the workers. |
| std::vector<ModelSafeWorker*> temp; |
| std::vector<ModelSafeWorker*> sorted_workers = workers; |
| std::sort(sorted_workers.begin(), sorted_workers.end()); |
| std::set_intersection(workers_.begin(), workers_.end(), |
| sorted_workers.begin(), sorted_workers.end(), |
| std::back_inserter(temp)); |
| workers_.swap(temp); |
| |
| // Now update enabled groups. |
| enabled_groups_ = ComputeEnabledGroups(routing_info_, workers_); |
| } |
| |
| SyncSessionSnapshot SyncSession::TakeSnapshot() const { |
| syncable::Directory* dir = context_->directory(); |
| |
| bool is_share_useable = true; |
| ModelTypeSet initial_sync_ended; |
| ProgressMarkerMap download_progress_markers; |
| for (int i = FIRST_REAL_MODEL_TYPE; i < MODEL_TYPE_COUNT; ++i) { |
| ModelType type(ModelTypeFromInt(i)); |
| if (routing_info_.count(type) != 0) { |
| if (dir->initial_sync_ended_for_type(type)) |
| initial_sync_ended.Put(type); |
| else |
| is_share_useable = false; |
| } |
| dir->GetDownloadProgressAsString(type, &download_progress_markers[type]); |
| } |
| |
| return SyncSessionSnapshot( |
| status_controller_->model_neutral_state(), |
| is_share_useable, |
| initial_sync_ended, |
| download_progress_markers, |
| delegate_->IsSyncingCurrentlySilenced(), |
| status_controller_->num_encryption_conflicts(), |
| status_controller_->num_hierarchy_conflicts(), |
| status_controller_->num_server_conflicts(), |
| source_, |
| context_->notifications_enabled(), |
| dir->GetEntriesCount(), |
| status_controller_->sync_start_time()); |
| } |
| |
| void SyncSession::SendEventNotification(SyncEngineEvent::EventCause cause) { |
| SyncEngineEvent event(cause); |
| event.snapshot = TakeSnapshot(); |
| |
| DVLOG(1) << "Sending event with snapshot: " << event.snapshot.ToString(); |
| context()->NotifyListeners(event); |
| } |
| |
| const std::set<ModelSafeGroup>& SyncSession::GetEnabledGroups() const { |
| return enabled_groups_; |
| } |
| |
| bool SyncSession::DidReachServer() const { |
| const ModelNeutralState& state = status_controller_->model_neutral_state(); |
| return state.last_get_key_result >= FIRST_SERVER_RETURN_VALUE || |
| state.last_download_updates_result >= FIRST_SERVER_RETURN_VALUE || |
| state.commit_result >= FIRST_SERVER_RETURN_VALUE; |
| } |
| |
| } // namespace sessions |
| } // namespace syncer |