src/sync/sessions/model_type_registry.cc

   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/sessions/model_type_registry.h"
   6
   7 #include "base/bind.h"
   8 #include "base/observer_list.h"
   9 #include "base/thread_task_runner_handle.h"
  10 #include "sync/engine/directory_commit_contributor.h"
  11 #include "sync/engine/directory_update_handler.h"
  12 #include "sync/engine/model_type_sync_proxy.h"
  13 #include "sync/engine/model_type_sync_proxy_impl.h"
  14 #include "sync/engine/model_type_sync_worker.h"
  15 #include "sync/engine/model_type_sync_worker_impl.h"
  16 #include "sync/internal_api/public/non_blocking_sync_common.h"
  17 #include "sync/sessions/directory_type_debug_info_emitter.h"
  18 #include "sync/util/cryptographer.h"
  19
  20 namespace syncer {
  21
  22 namespace {
  23
  24 class ModelTypeSyncProxyWrapper : public ModelTypeSyncProxy {
  25  public:
  26   ModelTypeSyncProxyWrapper(
  27       const base::WeakPtr<ModelTypeSyncProxyImpl>& proxy,
  28       const scoped_refptr<base::SequencedTaskRunner>& processor_task_runner);
  29   ~ModelTypeSyncProxyWrapper() override;
  30
  31   void OnCommitCompleted(const DataTypeState& type_state,
  32                          const CommitResponseDataList& response_list) override;
  33   void OnUpdateReceived(const DataTypeState& type_state,
  34                         const UpdateResponseDataList& response_list,
  35                         const UpdateResponseDataList& pending_updates) override;
  36
  37  private:
  38   base::WeakPtr<ModelTypeSyncProxyImpl> processor_;
  39   scoped_refptr<base::SequencedTaskRunner> processor_task_runner_;
  40 };
  41
  42 ModelTypeSyncProxyWrapper::ModelTypeSyncProxyWrapper(
  43     const base::WeakPtr<ModelTypeSyncProxyImpl>& proxy,
  44     const scoped_refptr<base::SequencedTaskRunner>& processor_task_runner)
  45     : processor_(proxy), processor_task_runner_(processor_task_runner) {
  46 }
  47
  48 ModelTypeSyncProxyWrapper::~ModelTypeSyncProxyWrapper() {
  49 }
  50
  51 void ModelTypeSyncProxyWrapper::OnCommitCompleted(
  52     const DataTypeState& type_state,
  53     const CommitResponseDataList& response_list) {
  54   processor_task_runner_->PostTask(
  55       FROM_HERE,
  56       base::Bind(&ModelTypeSyncProxyImpl::OnCommitCompleted,
  57                  processor_,
  58                  type_state,
  59                  response_list));
  60 }
  61
  62 void ModelTypeSyncProxyWrapper::OnUpdateReceived(
  63     const DataTypeState& type_state,
  64     const UpdateResponseDataList& response_list,
  65     const UpdateResponseDataList& pending_updates) {
  66   processor_task_runner_->PostTask(
  67       FROM_HERE,
  68       base::Bind(&ModelTypeSyncProxyImpl::OnUpdateReceived,
  69                  processor_,
  70                  type_state,
  71                  response_list,
  72                  pending_updates));
  73 }
  74
  75 class ModelTypeSyncWorkerWrapper : public ModelTypeSyncWorker {
  76  public:
  77   ModelTypeSyncWorkerWrapper(
  78       const base::WeakPtr<ModelTypeSyncWorkerImpl>& worker,
  79       const scoped_refptr<base::SequencedTaskRunner>& sync_thread);
  80   ~ModelTypeSyncWorkerWrapper() override;
  81
  82   void EnqueueForCommit(const CommitRequestDataList& list) override;
  83
  84  private:
  85   base::WeakPtr<ModelTypeSyncWorkerImpl> worker_;
  86   scoped_refptr<base::SequencedTaskRunner> sync_thread_;
  87 };
  88
  89 ModelTypeSyncWorkerWrapper::ModelTypeSyncWorkerWrapper(
  90     const base::WeakPtr<ModelTypeSyncWorkerImpl>& worker,
  91     const scoped_refptr<base::SequencedTaskRunner>& sync_thread)
  92     : worker_(worker), sync_thread_(sync_thread) {
  93 }
  94
  95 ModelTypeSyncWorkerWrapper::~ModelTypeSyncWorkerWrapper() {
  96 }
  97
  98 void ModelTypeSyncWorkerWrapper::EnqueueForCommit(
  99     const CommitRequestDataList& list) {
 100   sync_thread_->PostTask(
 101       FROM_HERE,
 102       base::Bind(&ModelTypeSyncWorkerImpl::EnqueueForCommit, worker_, list));
 103 }
 104
 105 }  // namespace
 106
 107 ModelTypeRegistry::ModelTypeRegistry(
 108     const std::vector<scoped_refptr<ModelSafeWorker> >& workers,
 109     syncable::Directory* directory,
 110     NudgeHandler* nudge_handler)
 111     : directory_(directory),
 112       nudge_handler_(nudge_handler),
 113       weak_ptr_factory_(this) {
 114   for (size_t i = 0u; i < workers.size(); ++i) {
 115     workers_map_.insert(
 116         std::make_pair(workers[i]->GetModelSafeGroup(), workers[i]));
 117   }
 118 }
 119
 120 ModelTypeRegistry::~ModelTypeRegistry() {
 121 }
 122
 123 void ModelTypeRegistry::SetEnabledDirectoryTypes(
 124     const ModelSafeRoutingInfo& routing_info) {
 125   // Remove all existing directory processors and delete them.  The
 126   // DebugInfoEmitters are not deleted here, since we want to preserve their
 127   // counters.
 128   for (ModelTypeSet::Iterator it = enabled_directory_types_.First();
 129        it.Good(); it.Inc()) {
 130     size_t result1 = update_handler_map_.erase(it.Get());
 131     size_t result2 = commit_contributor_map_.erase(it.Get());
 132     DCHECK_EQ(1U, result1);
 133     DCHECK_EQ(1U, result2);
 134   }
 135
 136   // Clear the old instances of directory update handlers and commit
 137   // contributors, deleting their contents in the processs.
 138   directory_update_handlers_.clear();
 139   directory_commit_contributors_.clear();
 140
 141   // Create new ones and add them to the appropriate containers.
 142   for (ModelSafeRoutingInfo::const_iterator routing_iter = routing_info.begin();
 143        routing_iter != routing_info.end(); ++routing_iter) {
 144     ModelType type = routing_iter->first;
 145     ModelSafeGroup group = routing_iter->second;
 146     std::map<ModelSafeGroup, scoped_refptr<ModelSafeWorker> >::iterator
 147         worker_it = workers_map_.find(group);
 148     DCHECK(worker_it != workers_map_.end());
 149     scoped_refptr<ModelSafeWorker> worker = worker_it->second;
 150
 151     // DebugInfoEmitters are never deleted.  Use existing one if we have it.
 152     DirectoryTypeDebugInfoEmitter* emitter = NULL;
 153     DirectoryTypeDebugInfoEmitterMap::iterator it =
 154         directory_type_debug_info_emitter_map_.find(type);
 155     if (it != directory_type_debug_info_emitter_map_.end()) {
 156       emitter = it->second;
 157     } else {
 158       emitter = new DirectoryTypeDebugInfoEmitter(directory_, type,
 159                                                   &type_debug_info_observers_);
 160       directory_type_debug_info_emitter_map_.insert(
 161           std::make_pair(type, emitter));
 162       directory_type_debug_info_emitters_.push_back(emitter);
 163     }
 164
 165     DirectoryCommitContributor* committer =
 166         new DirectoryCommitContributor(directory_, type, emitter);
 167     DirectoryUpdateHandler* updater =
 168         new DirectoryUpdateHandler(directory_, type, worker, emitter);
 169
 170     // These containers take ownership of their contents.
 171     directory_commit_contributors_.push_back(committer);
 172     directory_update_handlers_.push_back(updater);
 173
 174     bool inserted1 =
 175         update_handler_map_.insert(std::make_pair(type, updater)).second;
 176     DCHECK(inserted1) << "Attempt to override existing type handler in map";
 177
 178     bool inserted2 =
 179         commit_contributor_map_.insert(std::make_pair(type, committer)).second;
 180     DCHECK(inserted2) << "Attempt to override existing type handler in map";
 181   }
 182
 183   enabled_directory_types_ = GetRoutingInfoTypes(routing_info);
 184   DCHECK(Intersection(GetEnabledDirectoryTypes(),
 185                       GetEnabledNonBlockingTypes()).Empty());
 186 }
 187
 188 void ModelTypeRegistry::ConnectSyncTypeToWorker(
 189     ModelType type,
 190     const DataTypeState& data_type_state,
 191     const UpdateResponseDataList& saved_pending_updates,
 192     const scoped_refptr<base::SequencedTaskRunner>& type_task_runner,
 193     const base::WeakPtr<ModelTypeSyncProxyImpl>& proxy_impl) {
 194   DVLOG(1) << "Enabling an off-thread sync type: " << ModelTypeToString(type);
 195
 196   // Initialize Worker -> Proxy communication channel.
 197   scoped_ptr<ModelTypeSyncProxy> proxy(
 198       new ModelTypeSyncProxyWrapper(proxy_impl, type_task_runner));
 199   scoped_ptr<Cryptographer> cryptographer_copy;
 200   if (encrypted_types_.Has(type))
 201     cryptographer_copy.reset(new Cryptographer(*cryptographer_));
 202
 203   scoped_ptr<ModelTypeSyncWorkerImpl> worker(
 204       new ModelTypeSyncWorkerImpl(type,
 205                                   data_type_state,
 206                                   saved_pending_updates,
 207                                   cryptographer_copy.Pass(),
 208                                   nudge_handler_,
 209                                   proxy.Pass()));
 210
 211   // Initialize Proxy -> Worker communication channel.
 212   scoped_ptr<ModelTypeSyncWorker> wrapped_worker(
 213       new ModelTypeSyncWorkerWrapper(worker->AsWeakPtr(),
 214                                      scoped_refptr<base::SequencedTaskRunner>(
 215                                          base::ThreadTaskRunnerHandle::Get())));
 216   type_task_runner->PostTask(FROM_HERE,
 217                              base::Bind(&ModelTypeSyncProxyImpl::OnConnect,
 218                                         proxy_impl,
 219                                         base::Passed(&wrapped_worker)));
 220
 221   DCHECK(update_handler_map_.find(type) == update_handler_map_.end());
 222   DCHECK(commit_contributor_map_.find(type) == commit_contributor_map_.end());
 223
 224   update_handler_map_.insert(std::make_pair(type, worker.get()));
 225   commit_contributor_map_.insert(std::make_pair(type, worker.get()));
 226
 227   // The container takes ownership.
 228   model_type_sync_workers_.push_back(worker.release());
 229
 230   DCHECK(Intersection(GetEnabledDirectoryTypes(),
 231                       GetEnabledNonBlockingTypes()).Empty());
 232 }
 233
 234 void ModelTypeRegistry::DisconnectSyncWorker(ModelType type) {
 235   DVLOG(1) << "Disabling an off-thread sync type: " << ModelTypeToString(type);
 236   DCHECK(update_handler_map_.find(type) != update_handler_map_.end());
 237   DCHECK(commit_contributor_map_.find(type) != commit_contributor_map_.end());
 238
 239   size_t updaters_erased = update_handler_map_.erase(type);
 240   size_t committers_erased = commit_contributor_map_.erase(type);
 241
 242   DCHECK_EQ(1U, updaters_erased);
 243   DCHECK_EQ(1U, committers_erased);
 244
 245   // Remove from the ScopedVector, deleting the worker in the process.
 246   for (ScopedVector<ModelTypeSyncWorkerImpl>::iterator it =
 247            model_type_sync_workers_.begin();
 248        it != model_type_sync_workers_.end();
 249        ++it) {
 250     if ((*it)->GetModelType() == type) {
 251       model_type_sync_workers_.erase(it);
 252       break;
 253     }
 254   }
 255 }
 256
 257 ModelTypeSet ModelTypeRegistry::GetEnabledTypes() const {
 258   return Union(GetEnabledDirectoryTypes(), GetEnabledNonBlockingTypes());
 259 }
 260
 261 UpdateHandlerMap* ModelTypeRegistry::update_handler_map() {
 262   return &update_handler_map_;
 263 }
 264
 265 CommitContributorMap* ModelTypeRegistry::commit_contributor_map() {
 266   return &commit_contributor_map_;
 267 }
 268
 269 DirectoryTypeDebugInfoEmitterMap*
 270 ModelTypeRegistry::directory_type_debug_info_emitter_map() {
 271   return &directory_type_debug_info_emitter_map_;
 272 }
 273
 274 void ModelTypeRegistry::RegisterDirectoryTypeDebugInfoObserver(
 275     syncer::TypeDebugInfoObserver* observer) {
 276   if (!type_debug_info_observers_.HasObserver(observer))
 277     type_debug_info_observers_.AddObserver(observer);
 278 }
 279
 280 void ModelTypeRegistry::UnregisterDirectoryTypeDebugInfoObserver(
 281     syncer::TypeDebugInfoObserver* observer) {
 282   type_debug_info_observers_.RemoveObserver(observer);
 283 }
 284
 285 bool ModelTypeRegistry::HasDirectoryTypeDebugInfoObserver(
 286     syncer::TypeDebugInfoObserver* observer) {
 287   return type_debug_info_observers_.HasObserver(observer);
 288 }
 289
 290 void ModelTypeRegistry::RequestEmitDebugInfo() {
 291   for (DirectoryTypeDebugInfoEmitterMap::iterator it =
 292        directory_type_debug_info_emitter_map_.begin();
 293        it != directory_type_debug_info_emitter_map_.end(); ++it) {
 294     it->second->EmitCommitCountersUpdate();
 295     it->second->EmitUpdateCountersUpdate();
 296     it->second->EmitStatusCountersUpdate();
 297   }
 298 }
 299
 300 base::WeakPtr<SyncContext> ModelTypeRegistry::AsWeakPtr() {
 301   return weak_ptr_factory_.GetWeakPtr();
 302 }
 303
 304 void ModelTypeRegistry::OnPassphraseRequired(
 305     PassphraseRequiredReason reason,
 306     const sync_pb::EncryptedData& pending_keys) {
 307 }
 308
 309 void ModelTypeRegistry::OnPassphraseAccepted() {
 310 }
 311
 312 void ModelTypeRegistry::OnBootstrapTokenUpdated(
 313     const std::string& bootstrap_token,
 314     BootstrapTokenType type) {
 315 }
 316
 317 void ModelTypeRegistry::OnEncryptedTypesChanged(ModelTypeSet encrypted_types,
 318                                                 bool encrypt_everything) {
 319   encrypted_types_ = encrypted_types;
 320   OnEncryptionStateChanged();
 321 }
 322
 323 void ModelTypeRegistry::OnEncryptionComplete() {
 324 }
 325
 326 void ModelTypeRegistry::OnCryptographerStateChanged(
 327     Cryptographer* cryptographer) {
 328   cryptographer_.reset(new Cryptographer(*cryptographer));
 329   OnEncryptionStateChanged();
 330 }
 331
 332 void ModelTypeRegistry::OnPassphraseTypeChanged(PassphraseType type,
 333                                                 base::Time passphrase_time) {
 334 }
 335
 336 ModelTypeSet ModelTypeRegistry::GetEnabledDirectoryTypes() const {
 337   return enabled_directory_types_;
 338 }
 339
 340 void ModelTypeRegistry::OnEncryptionStateChanged() {
 341   for (ScopedVector<ModelTypeSyncWorkerImpl>::iterator it =
 342            model_type_sync_workers_.begin();
 343        it != model_type_sync_workers_.end();
 344        ++it) {
 345     if (encrypted_types_.Has((*it)->GetModelType())) {
 346       (*it)->UpdateCryptographer(
 347           make_scoped_ptr(new Cryptographer(*cryptographer_)));
 348     }
 349   }
 350 }
 351
 352 ModelTypeSet ModelTypeRegistry::GetEnabledNonBlockingTypes() const {
 353   ModelTypeSet enabled_off_thread_types;
 354   for (ScopedVector<ModelTypeSyncWorkerImpl>::const_iterator it =
 355            model_type_sync_workers_.begin();
 356        it != model_type_sync_workers_.end();
 357        ++it) {
 358     enabled_off_thread_types.Put((*it)->GetModelType());
 359   }
 360   return enabled_off_thread_types;
 361 }
 362
 363 }  // namespace syncer