sync/internal_api/sync_manager_impl.h

   1 // Copyright 2012 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 #ifndef SYNC_INTERNAL_API_SYNC_MANAGER_H_
   6 #define SYNC_INTERNAL_API_SYNC_MANAGER_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "net/base/network_change_notifier.h"
  12 #include "sync/base/sync_export.h"
  13 #include "sync/engine/all_status.h"
  14 #include "sync/engine/net/server_connection_manager.h"
  15 #include "sync/engine/sync_engine_event.h"
  16 #include "sync/engine/throttled_data_type_tracker.h"
  17 #include "sync/engine/traffic_recorder.h"
  18 #include "sync/internal_api/change_reorder_buffer.h"
  19 #include "sync/internal_api/debug_info_event_listener.h"
  20 #include "sync/internal_api/js_mutation_event_observer.h"
  21 #include "sync/internal_api/js_sync_encryption_handler_observer.h"
  22 #include "sync/internal_api/js_sync_manager_observer.h"
  23 #include "sync/internal_api/public/sync_manager.h"
  24 #include "sync/internal_api/sync_encryption_handler_impl.h"
  25 #include "sync/js/js_backend.h"
  26 #include "sync/notifier/invalidation_handler.h"
  27 #include "sync/notifier/invalidator_state.h"
  28 #include "sync/syncable/directory_change_delegate.h"
  29 #include "sync/util/cryptographer.h"
  30 #include "sync/util/time.h"
  31
  32 namespace syncer {
  33
  34 class SyncAPIServerConnectionManager;
  35 class WriteNode;
  36 class WriteTransaction;
  37
  38 namespace sessions {
  39 class SyncSessionContext;
  40 }
  41
  42 // SyncManager encapsulates syncable::Directory and serves as the parent of all
  43 // other objects in the sync API.  If multiple threads interact with the same
  44 // local sync repository (i.e. the same sqlite database), they should share a
  45 // single SyncManager instance.  The caller should typically create one
  46 // SyncManager for the lifetime of a user session.
  47 //
  48 // Unless stated otherwise, all methods of SyncManager should be called on the
  49 // same thread.
  50 class SYNC_EXPORT_PRIVATE SyncManagerImpl :
  51     public SyncManager,
  52     public net::NetworkChangeNotifier::IPAddressObserver,
  53     public net::NetworkChangeNotifier::ConnectionTypeObserver,
  54     public InvalidationHandler,
  55     public JsBackend,
  56     public SyncEngineEventListener,
  57     public ServerConnectionEventListener,
  58     public syncable::DirectoryChangeDelegate,
  59     public SyncEncryptionHandler::Observer {
  60  public:
  61   // Create an uninitialized SyncManager.  Callers must Init() before using.
  62   explicit SyncManagerImpl(const std::string& name);
  63   virtual ~SyncManagerImpl();
  64
  65   // SyncManager implementation.
  66   virtual void Init(
  67       const base::FilePath& database_location,
  68       const WeakHandle<JsEventHandler>& event_handler,
  69       const std::string& sync_server_and_path,
  70       int sync_server_port,
  71       bool use_ssl,
  72       scoped_ptr<HttpPostProviderFactory> post_factory,
  73       const std::vector<ModelSafeWorker*>& workers,
  74       ExtensionsActivityMonitor* extensions_activity_monitor,
  75       SyncManager::ChangeDelegate* change_delegate,
  76       const SyncCredentials& credentials,
  77       scoped_ptr<Invalidator> invalidator,
  78       const std::string& restored_key_for_bootstrapping,
  79       const std::string& restored_keystore_key_for_bootstrapping,
  80       scoped_ptr<InternalComponentsFactory> internal_components_factory,
  81       Encryptor* encryptor,
  82       UnrecoverableErrorHandler* unrecoverable_error_handler,
  83       ReportUnrecoverableErrorFunction
  84           report_unrecoverable_error_function) OVERRIDE;
  85   virtual void ThrowUnrecoverableError() OVERRIDE;
  86   virtual ModelTypeSet InitialSyncEndedTypes() OVERRIDE;
  87   virtual ModelTypeSet GetTypesWithEmptyProgressMarkerToken(
  88       ModelTypeSet types) OVERRIDE;
  89   virtual bool PurgePartiallySyncedTypes() OVERRIDE;
  90   virtual void UpdateCredentials(const SyncCredentials& credentials) OVERRIDE;
  91   virtual void UpdateEnabledTypes(ModelTypeSet enabled_types) OVERRIDE;
  92   virtual void RegisterInvalidationHandler(
  93       InvalidationHandler* handler) OVERRIDE;
  94   virtual void UpdateRegisteredInvalidationIds(
  95       InvalidationHandler* handler,
  96       const ObjectIdSet& ids) OVERRIDE;
  97   virtual void UnregisterInvalidationHandler(
  98       InvalidationHandler* handler) OVERRIDE;
  99   virtual void StartSyncingNormally(
 100       const ModelSafeRoutingInfo& routing_info) OVERRIDE;
 101   virtual void ConfigureSyncer(
 102       ConfigureReason reason,
 103       ModelTypeSet types_to_config,
 104       ModelTypeSet failed_types,
 105       const ModelSafeRoutingInfo& new_routing_info,
 106       const base::Closure& ready_task,
 107       const base::Closure& retry_task) OVERRIDE;
 108   virtual void AddObserver(SyncManager::Observer* observer) OVERRIDE;
 109   virtual void RemoveObserver(SyncManager::Observer* observer) OVERRIDE;
 110   virtual SyncStatus GetDetailedStatus() const OVERRIDE;
 111   virtual void SaveChanges() OVERRIDE;
 112   virtual void StopSyncingForShutdown(const base::Closure& callback) OVERRIDE;
 113   virtual void ShutdownOnSyncThread() OVERRIDE;
 114   virtual UserShare* GetUserShare() OVERRIDE;
 115   virtual const std::string cache_guid() OVERRIDE;
 116   virtual bool ReceivedExperiment(Experiments* experiments) OVERRIDE;
 117   virtual bool HasUnsyncedItems() OVERRIDE;
 118   virtual SyncEncryptionHandler* GetEncryptionHandler() OVERRIDE;
 119
 120   // SyncEncryptionHandler::Observer implementation.
 121   virtual void OnPassphraseRequired(
 122       PassphraseRequiredReason reason,
 123       const sync_pb::EncryptedData& pending_keys) OVERRIDE;
 124   virtual void OnPassphraseAccepted() OVERRIDE;
 125   virtual void OnBootstrapTokenUpdated(
 126       const std::string& bootstrap_token,
 127       BootstrapTokenType type) OVERRIDE;
 128   virtual void OnEncryptedTypesChanged(
 129       ModelTypeSet encrypted_types,
 130       bool encrypt_everything) OVERRIDE;
 131   virtual void OnEncryptionComplete() OVERRIDE;
 132   virtual void OnCryptographerStateChanged(
 133       Cryptographer* cryptographer) OVERRIDE;
 134   virtual void OnPassphraseTypeChanged(
 135       PassphraseType type,
 136       base::Time explicit_passphrase_time) OVERRIDE;
 137
 138   // Return the currently active (validated) username for use with syncable
 139   // types.
 140   const std::string& username_for_share() const;
 141
 142   static int GetDefaultNudgeDelay();
 143   static int GetPreferencesNudgeDelay();
 144
 145   // SyncEngineEventListener implementation.
 146   virtual void OnSyncEngineEvent(const SyncEngineEvent& event) OVERRIDE;
 147
 148   // ServerConnectionEventListener implementation.
 149   virtual void OnServerConnectionEvent(
 150       const ServerConnectionEvent& event) OVERRIDE;
 151
 152   // JsBackend implementation.
 153   virtual void SetJsEventHandler(
 154       const WeakHandle<JsEventHandler>& event_handler) OVERRIDE;
 155   virtual void ProcessJsMessage(
 156       const std::string& name, const JsArgList& args,
 157       const WeakHandle<JsReplyHandler>& reply_handler) OVERRIDE;
 158
 159   // DirectoryChangeDelegate implementation.
 160   // This listener is called upon completion of a syncable transaction, and
 161   // builds the list of sync-engine initiated changes that will be forwarded to
 162   // the SyncManager's Observers.
 163   virtual void HandleTransactionCompleteChangeEvent(
 164       ModelTypeSet models_with_changes) OVERRIDE;
 165   virtual ModelTypeSet HandleTransactionEndingChangeEvent(
 166       const syncable::ImmutableWriteTransactionInfo& write_transaction_info,
 167       syncable::BaseTransaction* trans) OVERRIDE;
 168   virtual void HandleCalculateChangesChangeEventFromSyncApi(
 169       const syncable::ImmutableWriteTransactionInfo& write_transaction_info,
 170       syncable::BaseTransaction* trans,
 171       std::vector<int64>* entries_changed) OVERRIDE;
 172   virtual void HandleCalculateChangesChangeEventFromSyncer(
 173       const syncable::ImmutableWriteTransactionInfo& write_transaction_info,
 174       syncable::BaseTransaction* trans,
 175       std::vector<int64>* entries_changed) OVERRIDE;
 176
 177   // InvalidationHandler implementation.
 178   virtual void OnInvalidatorStateChange(InvalidatorState state) OVERRIDE;
 179   virtual void OnIncomingInvalidation(
 180       const ObjectIdInvalidationMap& invalidation_map) OVERRIDE;
 181
 182   // Handle explicit requests to fetch updates for the given types.
 183   virtual void RefreshTypes(ModelTypeSet types) OVERRIDE;
 184
 185   // These OnYYYChanged() methods are only called by our NetworkChangeNotifier.
 186   // Called when IP address of primary interface changes.
 187   virtual void OnIPAddressChanged() OVERRIDE;
 188   // Called when the connection type of the system has changed.
 189   virtual void OnConnectionTypeChanged(
 190       net::NetworkChangeNotifier::ConnectionType) OVERRIDE;
 191
 192   const SyncScheduler* scheduler() const;
 193
 194   bool GetHasInvalidAuthTokenForTest() const;
 195
 196  private:
 197   friend class SyncManagerTest;
 198   FRIEND_TEST_ALL_PREFIXES(SyncManagerTest, NudgeDelayTest);
 199   FRIEND_TEST_ALL_PREFIXES(SyncManagerTest, OnNotificationStateChange);
 200   FRIEND_TEST_ALL_PREFIXES(SyncManagerTest, OnIncomingNotification);
 201   FRIEND_TEST_ALL_PREFIXES(SyncManagerTest, PurgeDisabledTypes);
 202
 203   struct NotificationInfo {
 204     NotificationInfo();
 205     ~NotificationInfo();
 206
 207     int total_count;
 208     std::string payload;
 209
 210     // Returned pointer owned by the caller.
 211     DictionaryValue* ToValue() const;
 212   };
 213
 214   base::TimeDelta GetNudgeDelayTimeDelta(const ModelType& model_type);
 215
 216   typedef std::map<ModelType, NotificationInfo> NotificationInfoMap;
 217   typedef JsArgList (SyncManagerImpl::*UnboundJsMessageHandler)(
 218       const JsArgList&);
 219   typedef base::Callback<JsArgList(const JsArgList&)> JsMessageHandler;
 220   typedef std::map<std::string, JsMessageHandler> JsMessageHandlerMap;
 221
 222   // Determine if the parents or predecessors differ between the old and new
 223   // versions of an entry stored in |a| and |b|.  Note that a node's index may
 224   // change without its NEXT_ID changing if the node at NEXT_ID also moved (but
 225   // the relative order is unchanged).  To handle such cases, we rely on the
 226   // caller to treat a position update on any sibling as updating the positions
 227   // of all siblings.
 228   bool VisiblePositionsDiffer(
 229       const syncable::EntryKernelMutation& mutation) const;
 230
 231   // Determine if any of the fields made visible to clients of the Sync API
 232   // differ between the versions of an entry stored in |a| and |b|. A return
 233   // value of false means that it should be OK to ignore this change.
 234   bool VisiblePropertiesDiffer(
 235       const syncable::EntryKernelMutation& mutation,
 236       Cryptographer* cryptographer) const;
 237
 238   // Open the directory named with username_for_share
 239   bool OpenDirectory();
 240
 241   // Purge those types from |previously_enabled_types| that are no longer
 242   // enabled in |currently_enabled_types|.
 243   bool PurgeDisabledTypes(ModelTypeSet previously_enabled_types,
 244                           ModelTypeSet currently_enabled_types,
 245                           ModelTypeSet failed_types);
 246
 247   void RequestNudgeForDataTypes(
 248       const tracked_objects::Location& nudge_location,
 249       ModelTypeSet type);
 250
 251   // If this is a deletion for a password, sets the legacy
 252   // ExtraPasswordChangeRecordData field of |buffer|. Otherwise sets
 253   // |buffer|'s specifics field to contain the unencrypted data.
 254   void SetExtraChangeRecordData(int64 id,
 255                                 ModelType type,
 256                                 ChangeReorderBuffer* buffer,
 257                                 Cryptographer* cryptographer,
 258                                 const syncable::EntryKernel& original,
 259                                 bool existed_before,
 260                                 bool exists_now);
 261
 262   // Called for every notification. This updates the notification statistics
 263   // to be displayed in about:sync.
 264   void UpdateNotificationInfo(
 265       const ModelTypeInvalidationMap& invalidation_map);
 266
 267   // Checks for server reachabilty and requests a nudge.
 268   void OnNetworkConnectivityChangedImpl();
 269
 270   // Helper function used only by the constructor.
 271   void BindJsMessageHandler(
 272     const std::string& name, UnboundJsMessageHandler unbound_message_handler);
 273
 274   // Returned pointer is owned by the caller.
 275   static DictionaryValue* NotificationInfoToValue(
 276       const NotificationInfoMap& notification_info);
 277
 278   static std::string NotificationInfoToString(
 279       const NotificationInfoMap& notification_info);
 280
 281   // JS message handlers.
 282   JsArgList GetNotificationState(const JsArgList& args);
 283   JsArgList GetNotificationInfo(const JsArgList& args);
 284   JsArgList GetRootNodeDetails(const JsArgList& args);
 285   JsArgList GetAllNodes(const JsArgList& args);
 286   JsArgList GetNodeSummariesById(const JsArgList& args);
 287   JsArgList GetNodeDetailsById(const JsArgList& args);
 288   JsArgList GetChildNodeIds(const JsArgList& args);
 289   JsArgList GetClientServerTraffic(const JsArgList& args);
 290
 291   syncable::Directory* directory();
 292
 293   base::FilePath database_path_;
 294
 295   const std::string name_;
 296
 297   base::ThreadChecker thread_checker_;
 298
 299   base::WeakPtrFactory<SyncManagerImpl> weak_ptr_factory_;
 300
 301   // Thread-safe handle used by
 302   // HandleCalculateChangesChangeEventFromSyncApi(), which can be
 303   // called from any thread.  Valid only between between calls to
 304   // Init() and Shutdown().
 305   //
 306   // TODO(akalin): Ideally, we wouldn't need to store this; instead,
 307   // we'd have another worker class which implements
 308   // HandleCalculateChangesChangeEventFromSyncApi() and we'd pass it a
 309   // WeakHandle when we construct it.
 310   WeakHandle<SyncManagerImpl> weak_handle_this_;
 311
 312   // We give a handle to share_ to clients of the API for use when constructing
 313   // any transaction type.
 314   UserShare share_;
 315
 316   // This can be called from any thread, but only between calls to
 317   // OpenDirectory() and ShutdownOnSyncThread().
 318   WeakHandle<SyncManager::ChangeObserver> change_observer_;
 319
 320   ObserverList<SyncManager::Observer> observers_;
 321
 322   // The ServerConnectionManager used to abstract communication between the
 323   // client (the Syncer) and the sync server.
 324   scoped_ptr<SyncAPIServerConnectionManager> connection_manager_;
 325
 326   // A container of various bits of information used by the SyncScheduler to
 327   // create SyncSessions.  Must outlive the SyncScheduler.
 328   scoped_ptr<sessions::SyncSessionContext> session_context_;
 329
 330   // The scheduler that runs the Syncer. Needs to be explicitly
 331   // Start()ed.
 332   scoped_ptr<SyncScheduler> scheduler_;
 333
 334   // The Invalidator which notifies us when updates need to be downloaded.
 335   scoped_ptr<Invalidator> invalidator_;
 336
 337   // A multi-purpose status watch object that aggregates stats from various
 338   // sync components.
 339   AllStatus allstatus_;
 340
 341   // Each element of this map is a store of change records produced by
 342   // HandleChangeEventFromSyncer during the CALCULATE_CHANGES step. The changes
 343   // are grouped by model type, and are stored here in tree order to be
 344   // forwarded to the observer slightly later, at the TRANSACTION_ENDING step
 345   // by HandleTransactionEndingChangeEvent. The list is cleared after observer
 346   // finishes processing.
 347   typedef std::map<int, ImmutableChangeRecordList> ChangeRecordMap;
 348   ChangeRecordMap change_records_;
 349
 350   SyncManager::ChangeDelegate* change_delegate_;
 351
 352   // Set to true once Init has been called.
 353   bool initialized_;
 354
 355   bool observing_network_connectivity_changes_;
 356
 357   InvalidatorState invalidator_state_;
 358
 359   // Map used to store the notification info to be displayed in
 360   // about:sync page.
 361   NotificationInfoMap notification_info_map_;
 362
 363   // These are for interacting with chrome://sync-internals.
 364   JsMessageHandlerMap js_message_handlers_;
 365   WeakHandle<JsEventHandler> js_event_handler_;
 366   JsSyncManagerObserver js_sync_manager_observer_;
 367   JsMutationEventObserver js_mutation_event_observer_;
 368   JsSyncEncryptionHandlerObserver js_sync_encryption_handler_observer_;
 369
 370   ThrottledDataTypeTracker throttled_data_type_tracker_;
 371
 372   // This is for keeping track of client events to send to the server.
 373   DebugInfoEventListener debug_info_event_listener_;
 374
 375   TrafficRecorder traffic_recorder_;
 376
 377   Encryptor* encryptor_;
 378   UnrecoverableErrorHandler* unrecoverable_error_handler_;
 379   ReportUnrecoverableErrorFunction report_unrecoverable_error_function_;
 380
 381   // Sync's encryption handler. It tracks the set of encrypted types, manages
 382   // changing passphrases, and in general handles sync-specific interactions
 383   // with the cryptographer.
 384   scoped_ptr<SyncEncryptionHandlerImpl> sync_encryption_handler_;
 385
 386   DISALLOW_COPY_AND_ASSIGN(SyncManagerImpl);
 387 };
 388
 389 }  // namespace syncer
 390
 391 #endif  // SYNC_INTERNAL_API_SYNC_MANAGER_H_