src/components/sync_driver/model_association_manager.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 "components/sync_driver/model_association_manager.h"
   6
   7 #include <algorithm>
   8 #include <functional>
   9
  10 #include "base/debug/trace_event.h"
  11 #include "base/logging.h"
  12 #include "base/message_loop/message_loop.h"
  13 #include "base/metrics/histogram.h"
  14 #include "sync/internal_api/public/base/model_type.h"
  15
  16 using syncer::ModelTypeSet;
  17
  18 namespace sync_driver {
  19
  20 namespace {
  21
  22 static const syncer::ModelType kStartOrder[] = {
  23   syncer::NIGORI,               //  Listed for completeness.
  24   syncer::DEVICE_INFO,          //  Listed for completeness.
  25   syncer::EXPERIMENTS,          //  Listed for completeness.
  26   syncer::PROXY_TABS,           //  Listed for completeness.
  27
  28   // Kick off the association of the non-UI types first so they can associate
  29   // in parallel with the UI types.
  30   syncer::PASSWORDS,
  31   syncer::AUTOFILL,
  32   syncer::AUTOFILL_PROFILE,
  33   syncer::EXTENSION_SETTINGS,
  34   syncer::APP_SETTINGS,
  35   syncer::TYPED_URLS,
  36   syncer::HISTORY_DELETE_DIRECTIVES,
  37   syncer::SYNCED_NOTIFICATIONS,
  38   syncer::SYNCED_NOTIFICATION_APP_INFO,
  39
  40   // UI thread data types.
  41   syncer::BOOKMARKS,
  42   syncer::SUPERVISED_USERS,     //  Syncing supervised users on initial login
  43                                 //  might block creating a new supervised user,
  44                                 //  so we want to do it early.
  45   syncer::PREFERENCES,
  46   syncer::PRIORITY_PREFERENCES,
  47   syncer::EXTENSIONS,
  48   syncer::APPS,
  49   syncer::APP_LIST,
  50   syncer::THEMES,
  51   syncer::SEARCH_ENGINES,
  52   syncer::SESSIONS,
  53   syncer::APP_NOTIFICATIONS,
  54   syncer::DICTIONARY,
  55   syncer::FAVICON_IMAGES,
  56   syncer::FAVICON_TRACKING,
  57   syncer::SUPERVISED_USER_SETTINGS,
  58   syncer::SUPERVISED_USER_SHARED_SETTINGS,
  59   syncer::ARTICLES,
  60   syncer::WIFI_CREDENTIALS,
  61 };
  62
  63 COMPILE_ASSERT(arraysize(kStartOrder) ==
  64                syncer::MODEL_TYPE_COUNT - syncer::FIRST_REAL_MODEL_TYPE,
  65                kStartOrder_IncorrectSize);
  66
  67 // The amount of time we wait for association to finish. If some types haven't
  68 // finished association by the time, DataTypeManager is notified of the
  69 // unfinished types.
  70 const int64 kAssociationTimeOutInSeconds = 600;
  71
  72 syncer::DataTypeAssociationStats BuildAssociationStatsFromMergeResults(
  73     const syncer::SyncMergeResult& local_merge_result,
  74     const syncer::SyncMergeResult& syncer_merge_result,
  75     const base::TimeDelta& association_wait_time,
  76     const base::TimeDelta& association_time) {
  77   DCHECK_EQ(local_merge_result.model_type(), syncer_merge_result.model_type());
  78   syncer::DataTypeAssociationStats stats;
  79   stats.had_error = local_merge_result.error().IsSet() ||
  80                     syncer_merge_result.error().IsSet();
  81   stats.num_local_items_before_association =
  82       local_merge_result.num_items_before_association();
  83   stats.num_sync_items_before_association =
  84       syncer_merge_result.num_items_before_association();
  85   stats.num_local_items_after_association =
  86       local_merge_result.num_items_after_association();
  87   stats.num_sync_items_after_association =
  88       syncer_merge_result.num_items_after_association();
  89   stats.num_local_items_added =
  90       local_merge_result.num_items_added();
  91   stats.num_local_items_deleted =
  92       local_merge_result.num_items_deleted();
  93   stats.num_local_items_modified =
  94       local_merge_result.num_items_modified();
  95   stats.local_version_pre_association =
  96       local_merge_result.pre_association_version();
  97   stats.num_sync_items_added =
  98       syncer_merge_result.num_items_added();
  99   stats.num_sync_items_deleted =
 100       syncer_merge_result.num_items_deleted();
 101   stats.num_sync_items_modified =
 102       syncer_merge_result.num_items_modified();
 103   stats.sync_version_pre_association =
 104       syncer_merge_result.pre_association_version();
 105   stats.association_wait_time = association_wait_time;
 106   stats.association_time = association_time;
 107   return stats;
 108 }
 109
 110 }  // namespace
 111
 112 ModelAssociationManager::ModelAssociationManager(
 113     const DataTypeController::TypeMap* controllers,
 114     ModelAssociationManagerDelegate* processor)
 115     : state_(IDLE),
 116       controllers_(controllers),
 117       delegate_(processor),
 118       configure_status_(DataTypeManager::UNKNOWN),
 119       weak_ptr_factory_(this) {
 120   // Ensure all data type controllers are stopped.
 121   for (DataTypeController::TypeMap::const_iterator it = controllers_->begin();
 122        it != controllers_->end(); ++it) {
 123     DCHECK_EQ(DataTypeController::NOT_RUNNING, (*it).second->state());
 124   }
 125 }
 126
 127 ModelAssociationManager::~ModelAssociationManager() {
 128 }
 129
 130 void ModelAssociationManager::Initialize(syncer::ModelTypeSet desired_types) {
 131   // state_ can be INITIALIZED_TO_CONFIGURE if types are reconfigured when
 132   // data is being downloaded, so StartAssociationAsync() is never called for
 133   // the first configuration.
 134   DCHECK_NE(CONFIGURING, state_);
 135
 136   // Only keep types that have controllers.
 137   desired_types_.Clear();
 138   for (syncer::ModelTypeSet::Iterator it = desired_types.First();
 139       it.Good(); it.Inc()) {
 140     if (controllers_->find(it.Get()) != controllers_->end())
 141       desired_types_.Put(it.Get());
 142   }
 143
 144   DVLOG(1) << "ModelAssociationManager: Initializing for "
 145            << syncer::ModelTypeSetToString(desired_types_);
 146
 147   state_ = INITIALIZED_TO_CONFIGURE;
 148
 149   StopDisabledTypes();
 150   LoadEnabledTypes();
 151 }
 152
 153 void ModelAssociationManager::StopDatatype(
 154     const syncer::SyncError& error,
 155     DataTypeController* dtc) {
 156   loaded_types_.Remove(dtc->type());
 157   associated_types_.Remove(dtc->type());
 158   associating_types_.Remove(dtc->type());
 159
 160   if (error.IsSet() || dtc->state() != DataTypeController::NOT_RUNNING) {
 161     // If an error was set, the delegate must be informed of the error.
 162     delegate_->OnSingleDataTypeWillStop(dtc->type(), error);
 163     dtc->Stop();
 164   }
 165 }
 166
 167 void ModelAssociationManager::StopDisabledTypes() {
 168   DVLOG(1) << "ModelAssociationManager: Stopping disabled types.";
 169   for (DataTypeController::TypeMap::const_iterator it = controllers_->begin();
 170        it != controllers_->end(); ++it) {
 171     DataTypeController* dtc = (*it).second.get();
 172     if (dtc->state() != DataTypeController::NOT_RUNNING &&
 173         !desired_types_.Has(dtc->type())) {
 174       DVLOG(1) << "ModelTypeToString: stop " << dtc->name();
 175       StopDatatype(syncer::SyncError(), dtc);
 176     }
 177   }
 178 }
 179
 180 void ModelAssociationManager::LoadEnabledTypes() {
 181   // Load in kStartOrder.
 182   for (size_t i = 0; i < arraysize(kStartOrder); i++) {
 183     syncer::ModelType type = kStartOrder[i];
 184     if (!desired_types_.Has(type))
 185       continue;
 186
 187     DCHECK(controllers_->find(type) != controllers_->end());
 188     DataTypeController* dtc = controllers_->find(type)->second.get();
 189     if (dtc->state() == DataTypeController::NOT_RUNNING) {
 190       DCHECK(!loaded_types_.Has(dtc->type()));
 191       DCHECK(!associated_types_.Has(dtc->type()));
 192       dtc->LoadModels(base::Bind(&ModelAssociationManager::ModelLoadCallback,
 193                                  weak_ptr_factory_.GetWeakPtr()));
 194     }
 195   }
 196 }
 197
 198 void ModelAssociationManager::StartAssociationAsync(
 199     const syncer::ModelTypeSet& types_to_associate) {
 200   DCHECK_NE(CONFIGURING, state_);
 201   state_ = CONFIGURING;
 202
 203   association_start_time_ = base::TimeTicks::Now();
 204
 205   requested_types_ = types_to_associate;
 206
 207   associating_types_ = types_to_associate;
 208   associating_types_.RetainAll(desired_types_);
 209   associating_types_.RemoveAll(associated_types_);
 210
 211   // Assume success.
 212   configure_status_ = DataTypeManager::OK;
 213
 214   // Done if no types to associate.
 215   if (associating_types_.Empty()) {
 216     ModelAssociationDone();
 217     return;
 218   }
 219
 220   timer_.Start(FROM_HERE,
 221                base::TimeDelta::FromSeconds(kAssociationTimeOutInSeconds),
 222                this,
 223                &ModelAssociationManager::ModelAssociationDone);
 224
 225   // Start association of types that are loaded in specified order.
 226   for (size_t i = 0; i < arraysize(kStartOrder); i++) {
 227     syncer::ModelType type = kStartOrder[i];
 228     if (!associating_types_.Has(type) || !loaded_types_.Has(type))
 229       continue;
 230
 231     DataTypeController* dtc = controllers_->find(type)->second.get();
 232     DCHECK(DataTypeController::MODEL_LOADED == dtc->state() ||
 233            DataTypeController::ASSOCIATING == dtc->state());
 234     if (dtc->state() == DataTypeController::MODEL_LOADED) {
 235       TRACE_EVENT_ASYNC_BEGIN1("sync", "ModelAssociation",
 236                                dtc,
 237                                "DataType",
 238                                ModelTypeToString(type));
 239
 240       dtc->StartAssociating(
 241           base::Bind(&ModelAssociationManager::TypeStartCallback,
 242                      weak_ptr_factory_.GetWeakPtr(),
 243                      type, base::TimeTicks::Now()));
 244     }
 245   }
 246 }
 247
 248 void ModelAssociationManager::ResetForNextAssociation() {
 249   DVLOG(1) << "ModelAssociationManager: Reseting for next configuration";
 250   // |loaded_types_| and |associated_types_| are not cleared. So
 251   // reconfiguration won't restart types that are already started.
 252   requested_types_.Clear();
 253   associating_types_.Clear();
 254 }
 255
 256 void ModelAssociationManager::Stop() {
 257   // Ignore callbacks from controllers.
 258   weak_ptr_factory_.InvalidateWeakPtrs();
 259
 260   desired_types_.Clear();
 261   loaded_types_.Clear();
 262   associated_types_.Clear();
 263   associating_types_.Clear();
 264
 265   // Stop started data types.
 266   for (DataTypeController::TypeMap::const_iterator it = controllers_->begin();
 267        it != controllers_->end(); ++it) {
 268     DataTypeController* dtc = (*it).second.get();
 269     if (dtc->state() != DataTypeController::NOT_RUNNING) {
 270       StopDatatype(syncer::SyncError(), dtc);
 271       DVLOG(1) << "ModelAssociationManager: Stopped " << dtc->name();
 272     }
 273   }
 274
 275   if (state_ == CONFIGURING) {
 276     if (configure_status_ == DataTypeManager::OK)
 277       configure_status_ = DataTypeManager::ABORTED;
 278     DVLOG(1) << "ModelAssociationManager: Calling OnModelAssociationDone";
 279     ModelAssociationDone();
 280   }
 281
 282   ResetForNextAssociation();
 283
 284   state_ = IDLE;
 285 }
 286
 287 void ModelAssociationManager::ModelLoadCallback(syncer::ModelType type,
 288                                                 syncer::SyncError error) {
 289   DVLOG(1) << "ModelAssociationManager: ModelLoadCallback for "
 290       << syncer::ModelTypeToString(type);
 291
 292   if (error.IsSet()) {
 293     syncer::SyncMergeResult local_merge_result(type);
 294     local_merge_result.set_error(error);
 295     TypeStartCallback(type,
 296                       base::TimeTicks::Now(),
 297                       DataTypeController::ASSOCIATION_FAILED,
 298                       local_merge_result,
 299                       syncer::SyncMergeResult(type));
 300     return;
 301   }
 302
 303   // This happens when slow loading type is disabled by new configuration.
 304   if (!desired_types_.Has(type))
 305     return;
 306
 307   DCHECK(!loaded_types_.Has(type));
 308   loaded_types_.Put(type);
 309   if (associating_types_.Has(type)) {
 310     DataTypeController* dtc = controllers_->find(type)->second.get();
 311     dtc->StartAssociating(
 312         base::Bind(&ModelAssociationManager::TypeStartCallback,
 313                    weak_ptr_factory_.GetWeakPtr(),
 314                    type, base::TimeTicks::Now()));
 315   }
 316 }
 317
 318 void ModelAssociationManager::TypeStartCallback(
 319     syncer::ModelType type,
 320     base::TimeTicks type_start_time,
 321     DataTypeController::ConfigureResult start_result,
 322     const syncer::SyncMergeResult& local_merge_result,
 323     const syncer::SyncMergeResult& syncer_merge_result) {
 324   if (desired_types_.Has(type) &&
 325       !DataTypeController::IsSuccessfulResult(start_result)) {
 326     DVLOG(1) << "ModelAssociationManager: Type encountered an error.";
 327     desired_types_.Remove(type);
 328     DataTypeController* dtc = controllers_->find(type)->second.get();
 329     StopDatatype(local_merge_result.error(), dtc);
 330
 331     // Update configuration result.
 332     if (start_result == DataTypeController::UNRECOVERABLE_ERROR)
 333       configure_status_ = DataTypeManager::UNRECOVERABLE_ERROR;
 334   }
 335
 336   // This happens when a slow associating type is disabled or if a type
 337   // disables itself after initial configuration.
 338   if (!desired_types_.Has(type)) {
 339       // It's possible all types failed to associate, in which case association
 340       // is complete.
 341       if (state_ == CONFIGURING && associating_types_.Empty())
 342         ModelAssociationDone();
 343       return;
 344   }
 345
 346   DCHECK(!associated_types_.Has(type));
 347   DCHECK(DataTypeController::IsSuccessfulResult(start_result));
 348   associated_types_.Put(type);
 349
 350   if (state_ != CONFIGURING)
 351     return;
 352
 353   TRACE_EVENT_ASYNC_END1("sync", "ModelAssociation",
 354                          controllers_->find(type)->second.get(),
 355                          "DataType",
 356                          ModelTypeToString(type));
 357
 358   // Track the merge results if we succeeded or an association failure
 359   // occurred.
 360   if (syncer::ProtocolTypes().Has(type)) {
 361     base::TimeDelta association_wait_time =
 362         std::max(base::TimeDelta(), type_start_time - association_start_time_);
 363     base::TimeDelta association_time =
 364         base::TimeTicks::Now() - type_start_time;;
 365     syncer::DataTypeAssociationStats stats =
 366         BuildAssociationStatsFromMergeResults(local_merge_result,
 367                                               syncer_merge_result,
 368                                               association_wait_time,
 369                                               association_time);
 370     delegate_->OnSingleDataTypeAssociationDone(type, stats);
 371   }
 372
 373   associating_types_.Remove(type);
 374
 375   if (associating_types_.Empty())
 376     ModelAssociationDone();
 377 }
 378
 379 void ModelAssociationManager::ModelAssociationDone() {
 380   CHECK_EQ(CONFIGURING, state_);
 381
 382   timer_.Stop();
 383
 384   // Treat any unfinished types as having errors.
 385   desired_types_.RemoveAll(associating_types_);
 386   for (DataTypeController::TypeMap::const_iterator it = controllers_->begin();
 387        it != controllers_->end(); ++it) {
 388     DataTypeController* dtc = (*it).second.get();
 389     if (associating_types_.Has(dtc->type()) &&
 390         dtc->state() != DataTypeController::NOT_RUNNING) {
 391       UMA_HISTOGRAM_ENUMERATION("Sync.ConfigureFailed",
 392                                 ModelTypeToHistogramInt(dtc->type()),
 393                                 syncer::MODEL_TYPE_COUNT);
 394       StopDatatype(syncer::SyncError(FROM_HERE,
 395                                      syncer::SyncError::DATATYPE_ERROR,
 396                                      "Association timed out.",
 397                                      dtc->type()),
 398                    dtc);
 399     }
 400   }
 401
 402   DataTypeManager::ConfigureResult result(configure_status_,
 403                                           requested_types_);
 404
 405   // Reset state before notifying |delegate_| because that might
 406   // trigger a new round of configuration.
 407   ResetForNextAssociation();
 408   state_ = IDLE;
 409
 410   delegate_->OnModelAssociationDone(result);
 411 }
 412
 413 base::OneShotTimer<ModelAssociationManager>*
 414     ModelAssociationManager::GetTimerForTesting() {
 415   return &timer_;
 416 }
 417
 418 }  // namespace sync_driver