chrome/browser/sync/glue/sync_backend_host_core.h

   1 // Copyright 2013 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 CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_CORE_H_
   6 #define CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_CORE_H_
   7
   8 #include "base/memory/ref_counted.h"
   9
  10 #include "base/timer/timer.h"
  11 #include "chrome/browser/sync/glue/sync_backend_host_impl.h"
  12 #include "components/sync_driver/system_encryptor.h"
  13 #include "sync/internal_api/public/base/cancelation_signal.h"
  14 #include "sync/internal_api/public/sessions/type_debug_info_observer.h"
  15 #include "sync/internal_api/public/shutdown_reason.h"
  16 #include "sync/internal_api/public/sync_encryption_handler.h"
  17 #include "url/gurl.h"
  18
  19 namespace browser_sync {
  20
  21 class SyncBackendHostImpl;
  22
  23 // Utility struct for holding initialization options.
  24 struct DoInitializeOptions {
  25   DoInitializeOptions(
  26       base::MessageLoop* sync_loop,
  27       SyncBackendRegistrar* registrar,
  28       const syncer::ModelSafeRoutingInfo& routing_info,
  29       const std::vector<scoped_refptr<syncer::ModelSafeWorker> >& workers,
  30       const scoped_refptr<syncer::ExtensionsActivity>& extensions_activity,
  31       const syncer::WeakHandle<syncer::JsEventHandler>& event_handler,
  32       const GURL& service_url,
  33       scoped_ptr<syncer::HttpPostProviderFactory> http_bridge_factory,
  34       const syncer::SyncCredentials& credentials,
  35       const std::string& invalidator_client_id,
  36       scoped_ptr<syncer::SyncManagerFactory> sync_manager_factory,
  37       bool delete_sync_data_folder,
  38       const std::string& restored_key_for_bootstrapping,
  39       const std::string& restored_keystore_key_for_bootstrapping,
  40       scoped_ptr<syncer::InternalComponentsFactory> internal_components_factory,
  41       scoped_ptr<syncer::UnrecoverableErrorHandler> unrecoverable_error_handler,
  42       syncer::ReportUnrecoverableErrorFunction
  43           report_unrecoverable_error_function,
  44       const std::string& signin_scoped_device_id);
  45   ~DoInitializeOptions();
  46
  47   base::MessageLoop* sync_loop;
  48   SyncBackendRegistrar* registrar;
  49   syncer::ModelSafeRoutingInfo routing_info;
  50   std::vector<scoped_refptr<syncer::ModelSafeWorker> > workers;
  51   scoped_refptr<syncer::ExtensionsActivity> extensions_activity;
  52   syncer::WeakHandle<syncer::JsEventHandler> event_handler;
  53   GURL service_url;
  54   // Overridden by tests.
  55   scoped_ptr<syncer::HttpPostProviderFactory> http_bridge_factory;
  56   syncer::SyncCredentials credentials;
  57   const std::string invalidator_client_id;
  58   scoped_ptr<syncer::SyncManagerFactory> sync_manager_factory;
  59   std::string lsid;
  60   bool delete_sync_data_folder;
  61   std::string restored_key_for_bootstrapping;
  62   std::string restored_keystore_key_for_bootstrapping;
  63   scoped_ptr<syncer::InternalComponentsFactory> internal_components_factory;
  64   scoped_ptr<syncer::UnrecoverableErrorHandler> unrecoverable_error_handler;
  65   syncer::ReportUnrecoverableErrorFunction
  66       report_unrecoverable_error_function;
  67   std::string signin_scoped_device_id;
  68 };
  69
  70 // Helper struct to handle currying params to
  71 // SyncBackendHost::Core::DoConfigureSyncer.
  72 struct DoConfigureSyncerTypes {
  73   DoConfigureSyncerTypes();
  74   ~DoConfigureSyncerTypes();
  75   syncer::ModelTypeSet to_download;
  76   syncer::ModelTypeSet to_purge;
  77   syncer::ModelTypeSet to_journal;
  78   syncer::ModelTypeSet to_unapply;
  79 };
  80
  81 class SyncBackendHostCore
  82     : public base::RefCountedThreadSafe<SyncBackendHostCore>,
  83       public syncer::SyncEncryptionHandler::Observer,
  84       public syncer::SyncManager::Observer,
  85       public syncer::TypeDebugInfoObserver {
  86  public:
  87   SyncBackendHostCore(const std::string& name,
  88        const base::FilePath& sync_data_folder_path,
  89        bool has_sync_setup_completed,
  90        const base::WeakPtr<SyncBackendHostImpl>& backend);
  91
  92   // SyncManager::Observer implementation.  The Core just acts like an air
  93   // traffic controller here, forwarding incoming messages to appropriate
  94   // landing threads.
  95   virtual void OnSyncCycleCompleted(
  96       const syncer::sessions::SyncSessionSnapshot& snapshot) OVERRIDE;
  97   virtual void OnInitializationComplete(
  98       const syncer::WeakHandle<syncer::JsBackend>& js_backend,
  99       const syncer::WeakHandle<syncer::DataTypeDebugInfoListener>&
 100           debug_info_listener,
 101       bool success,
 102       syncer::ModelTypeSet restored_types) OVERRIDE;
 103   virtual void OnConnectionStatusChange(
 104       syncer::ConnectionStatus status) OVERRIDE;
 105   virtual void OnActionableError(
 106       const syncer::SyncProtocolError& sync_error) OVERRIDE;
 107   virtual void OnMigrationRequested(syncer::ModelTypeSet types) OVERRIDE;
 108   virtual void OnProtocolEvent(const syncer::ProtocolEvent& event) OVERRIDE;
 109
 110   // SyncEncryptionHandler::Observer implementation.
 111   virtual void OnPassphraseRequired(
 112       syncer::PassphraseRequiredReason reason,
 113       const sync_pb::EncryptedData& pending_keys) OVERRIDE;
 114   virtual void OnPassphraseAccepted() OVERRIDE;
 115   virtual void OnBootstrapTokenUpdated(
 116       const std::string& bootstrap_token,
 117       syncer::BootstrapTokenType type) OVERRIDE;
 118   virtual void OnEncryptedTypesChanged(
 119       syncer::ModelTypeSet encrypted_types,
 120       bool encrypt_everything) OVERRIDE;
 121   virtual void OnEncryptionComplete() OVERRIDE;
 122   virtual void OnCryptographerStateChanged(
 123       syncer::Cryptographer* cryptographer) OVERRIDE;
 124   virtual void OnPassphraseTypeChanged(syncer::PassphraseType type,
 125                                        base::Time passphrase_time) OVERRIDE;
 126
 127   // TypeDebugInfoObserver implementation
 128   virtual void OnCommitCountersUpdated(
 129       syncer::ModelType type,
 130       const syncer::CommitCounters& counters) OVERRIDE;
 131   virtual void OnUpdateCountersUpdated(
 132       syncer::ModelType type,
 133       const syncer::UpdateCounters& counters) OVERRIDE;
 134   virtual void OnStatusCountersUpdated(
 135       syncer::ModelType type,
 136       const syncer::StatusCounters& counters) OVERRIDE;
 137
 138   // Forwards an invalidation state change to the sync manager.
 139   void DoOnInvalidatorStateChange(syncer::InvalidatorState state);
 140
 141   // Forwards an invalidation to the sync manager.
 142   void DoOnIncomingInvalidation(
 143       const syncer::ObjectIdInvalidationMap& invalidation_map);
 144
 145   // Note:
 146   //
 147   // The Do* methods are the various entry points from our
 148   // SyncBackendHost.  They are all called on the sync thread to
 149   // actually perform synchronous (and potentially blocking) syncapi
 150   // operations.
 151   //
 152   // Called to perform initialization of the syncapi on behalf of
 153   // SyncBackendHost::Initialize.
 154   void DoInitialize(scoped_ptr<DoInitializeOptions> options);
 155
 156   // Called to perform credential update on behalf of
 157   // SyncBackendHost::UpdateCredentials.
 158   void DoUpdateCredentials(const syncer::SyncCredentials& credentials);
 159
 160   // Called to tell the syncapi to start syncing (generally after
 161   // initialization and authentication).
 162   void DoStartSyncing(const syncer::ModelSafeRoutingInfo& routing_info);
 163
 164   // Called to set the passphrase for encryption.
 165   void DoSetEncryptionPassphrase(const std::string& passphrase,
 166                                  bool is_explicit);
 167
 168   // Called to decrypt the pending keys.
 169   void DoSetDecryptionPassphrase(const std::string& passphrase);
 170
 171   // Called to turn on encryption of all sync data as well as
 172   // reencrypt everything.
 173   void DoEnableEncryptEverything();
 174
 175   // Ask the syncer to check for updates for the specified types.
 176   void DoRefreshTypes(syncer::ModelTypeSet types);
 177
 178   // Invoked if we failed to download the necessary control types at startup.
 179   // Invokes SyncBackendHost::HandleControlTypesDownloadRetry.
 180   void OnControlTypesDownloadRetry();
 181
 182   // Called to perform tasks which require the control data to be downloaded.
 183   // This includes refreshing encryption, setting up the device info change
 184   // processor, etc.
 185   void DoInitialProcessControlTypes();
 186
 187   // Some parts of DoInitialProcessControlTypes() may be executed on a different
 188   // thread.  This function asynchronously continues the work started in
 189   // DoInitialProcessControlTypes() once that other thread gets back to us.
 190   void DoFinishInitialProcessControlTypes();
 191
 192   // The shutdown order is a bit complicated:
 193   // 1) Call ShutdownOnUIThread() from |frontend_loop_| to request sync manager
 194   //    to stop as soon as possible.
 195   // 2) Post DoShutdown() to sync loop to clean up backend state, save
 196   //    directory and destroy sync manager.
 197   void ShutdownOnUIThread();
 198   void DoShutdown(syncer::ShutdownReason reason);
 199   void DoDestroySyncManager(syncer::ShutdownReason reason);
 200
 201   // Configuration methods that must execute on sync loop.
 202   void DoConfigureSyncer(
 203       syncer::ConfigureReason reason,
 204       const DoConfigureSyncerTypes& config_types,
 205       const syncer::ModelSafeRoutingInfo routing_info,
 206       const base::Callback<void(syncer::ModelTypeSet,
 207                                 syncer::ModelTypeSet)>& ready_task,
 208       const base::Closure& retry_callback);
 209   void DoFinishConfigureDataTypes(
 210       syncer::ModelTypeSet types_to_config,
 211       const base::Callback<void(syncer::ModelTypeSet,
 212                                 syncer::ModelTypeSet)>& ready_task);
 213   void DoRetryConfiguration(
 214       const base::Closure& retry_callback);
 215
 216   // Set the base request context to use when making HTTP calls.
 217   // This method will add a reference to the context to persist it
 218   // on the IO thread. Must be removed from IO thread.
 219
 220   syncer::SyncManager* sync_manager() { return sync_manager_.get(); }
 221
 222   SyncedDeviceTracker* synced_device_tracker() {
 223     return synced_device_tracker_.get();
 224   }
 225
 226   void SendBufferedProtocolEventsAndEnableForwarding();
 227   void DisableProtocolEventForwarding();
 228
 229   // Enables the forwarding of directory type debug counters to the
 230   // SyncBackendHost.  Also requests that updates to all counters be
 231   // emitted right away to initialize any new listeners' states.
 232   void EnableDirectoryTypeDebugInfoForwarding();
 233
 234   // Disables forwarding of directory type debug counters.
 235   void DisableDirectoryTypeDebugInfoForwarding();
 236
 237   // Delete the sync data folder to cleanup backend data.  Happens the first
 238   // time sync is enabled for a user (to prevent accidentally reusing old
 239   // sync databases), as well as shutdown when you're no longer syncing.
 240   void DeleteSyncDataFolder();
 241
 242   // We expose this member because it's required in the construction of the
 243   // HttpBridgeFactory.
 244   syncer::CancelationSignal* GetRequestContextCancelationSignal() {
 245     return &release_request_context_signal_;
 246   }
 247
 248   void GetAllNodesForTypes(
 249       syncer::ModelTypeSet types,
 250       scoped_refptr<base::SequencedTaskRunner> task_runner,
 251       base::Callback<void(const std::vector<syncer::ModelType>& type,
 252                           ScopedVector<base::ListValue>) > callback);
 253
 254  private:
 255   friend class base::RefCountedThreadSafe<SyncBackendHostCore>;
 256   friend class SyncBackendHostForProfileSyncTest;
 257
 258   virtual ~SyncBackendHostCore();
 259
 260   // Invoked when initialization of syncapi is complete and we can start
 261   // our timer.
 262   // This must be called from the thread on which SaveChanges is intended to
 263   // be run on; the host's |registrar_->sync_thread()|.
 264   void StartSavingChanges();
 265
 266   // Invoked periodically to tell the syncapi to persist its state
 267   // by writing to disk.
 268   // This is called from the thread we were created on (which is sync thread),
 269   // using a repeating timer that is kicked off as soon as the SyncManager
 270   // tells us it completed initialization.
 271   void SaveChanges();
 272
 273   // Name used for debugging.
 274   const std::string name_;
 275
 276   // Path of the folder that stores the sync data files.
 277   const base::FilePath sync_data_folder_path_;
 278
 279   // Our parent SyncBackendHost.
 280   syncer::WeakHandle<SyncBackendHostImpl> host_;
 281
 282   // The loop where all the sync backend operations happen.
 283   // Non-NULL only between calls to DoInitialize() and ~Core().
 284   base::MessageLoop* sync_loop_;
 285
 286   // Our parent's registrar (not owned).  Non-NULL only between
 287   // calls to DoInitialize() and DoShutdown().
 288   SyncBackendRegistrar* registrar_;
 289
 290   // The timer used to periodically call SaveChanges.
 291   scoped_ptr<base::RepeatingTimer<SyncBackendHostCore> > save_changes_timer_;
 292
 293   // Our encryptor, which uses Chrome's encryption functions.
 294   sync_driver::SystemEncryptor encryptor_;
 295
 296   // A special ChangeProcessor that tracks the DEVICE_INFO type for us.
 297   scoped_ptr<SyncedDeviceTracker> synced_device_tracker_;
 298
 299   // The top-level syncapi entry point.  Lives on the sync thread.
 300   scoped_ptr<syncer::SyncManager> sync_manager_;
 301
 302   // Temporary holder of sync manager's initialization results. Set by
 303   // OnInitializeComplete, and consumed when we pass it via OnBackendInitialized
 304   // in the final state of HandleInitializationSuccessOnFrontendLoop.
 305   syncer::WeakHandle<syncer::JsBackend> js_backend_;
 306   syncer::WeakHandle<syncer::DataTypeDebugInfoListener> debug_info_listener_;
 307
 308   // These signals allow us to send requests to shut down the HttpBridgeFactory
 309   // and ServerConnectionManager without having to wait for those classes to
 310   // finish initializing first.
 311   //
 312   // See comments in SyncBackendHostCore::ShutdownOnUIThread() for more details.
 313   syncer::CancelationSignal release_request_context_signal_;
 314   syncer::CancelationSignal stop_syncing_signal_;
 315
 316   // Matches the value of SyncPref's HasSyncSetupCompleted() flag at init time.
 317   // Should not be used for anything except for UMAs and logging.
 318   const bool has_sync_setup_completed_;
 319
 320   // Set when we've been asked to forward sync protocol events to the frontend.
 321   bool forward_protocol_events_;
 322
 323   // Set when the forwarding of per-type debug counters is enabled.
 324   bool forward_type_info_;
 325
 326   // Obtained from SigninClient::GetSigninScopedDeviceId(). Stored here just to
 327   // pass from SyncBackendHostImpl to SyncedDeviceTracker.
 328   std::string signin_scoped_device_id_;
 329
 330   base::WeakPtrFactory<SyncBackendHostCore> weak_ptr_factory_;
 331
 332   DISALLOW_COPY_AND_ASSIGN(SyncBackendHostCore);
 333 };
 334
 335 }  // namespace browser_sync
 336
 337 #endif  // CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_CORE_H_