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.
5 #ifndef CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_IMPL_H_
6 #define CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_IMPL_H_
10 #include "base/basictypes.h"
11 #include "base/callback.h"
12 #include "base/compiler_specific.h"
13 #include "base/memory/scoped_ptr.h"
14 #include "base/memory/weak_ptr.h"
15 #include "base/threading/thread.h"
16 #include "chrome/browser/sync/glue/extensions_activity_monitor.h"
17 #include "chrome/browser/sync/glue/sync_backend_host.h"
18 #include "components/invalidation/invalidation_handler.h"
19 #include "components/sync_driver/backend_data_type_configurer.h"
20 #include "content/public/browser/notification_observer.h"
21 #include "content/public/browser/notification_registrar.h"
22 #include "sync/internal_api/public/base/model_type.h"
23 #include "sync/internal_api/public/configure_reason.h"
24 #include "sync/internal_api/public/sessions/sync_session_snapshot.h"
25 #include "sync/internal_api/public/sessions/type_debug_info_observer.h"
26 #include "sync/internal_api/public/sync_manager.h"
27 #include "sync/internal_api/public/util/report_unrecoverable_error_function.h"
28 #include "sync/internal_api/public/util/unrecoverable_error_handler.h"
29 #include "sync/internal_api/public/util/weak_handle.h"
30 #include "sync/protocol/encryption.pb.h"
31 #include "sync/protocol/sync_protocol_error.h"
32 #include "sync/util/extensions_activity.h"
41 namespace invalidation {
42 class InvalidationService;
46 class NetworkResources;
47 class SyncManagerFactory;
50 namespace sync_driver {
54 namespace browser_sync {
56 class ChangeProcessor;
57 class SyncBackendHostCore;
58 class SyncBackendRegistrar;
59 struct DoInitializeOptions;
61 // The only real implementation of the SyncBackendHost. See that interface's
62 // definition for documentation of public methods.
63 class SyncBackendHostImpl
64 : public SyncBackendHost,
65 public content::NotificationObserver,
66 public syncer::InvalidationHandler {
68 typedef syncer::SyncStatus Status;
70 // Create a SyncBackendHost with a reference to the |frontend| that
71 // it serves and communicates to via the SyncFrontend interface (on
72 // the same thread it used to call the constructor). Must outlive
74 SyncBackendHostImpl(const std::string& name,
76 invalidation::InvalidationService* invalidator,
77 const base::WeakPtr<sync_driver::SyncPrefs>& sync_prefs,
78 const base::FilePath& sync_folder);
79 virtual ~SyncBackendHostImpl();
81 // SyncBackendHost implementation.
82 virtual void Initialize(
83 sync_driver::SyncFrontend* frontend,
84 scoped_ptr<base::Thread> sync_thread,
85 const syncer::WeakHandle<syncer::JsEventHandler>& event_handler,
86 const GURL& service_url,
87 const syncer::SyncCredentials& credentials,
88 bool delete_sync_data_folder,
89 scoped_ptr<syncer::SyncManagerFactory> sync_manager_factory,
90 scoped_ptr<syncer::UnrecoverableErrorHandler> unrecoverable_error_handler,
91 syncer::ReportUnrecoverableErrorFunction
92 report_unrecoverable_error_function,
93 syncer::NetworkResources* network_resources) OVERRIDE;
94 virtual void UpdateCredentials(
95 const syncer::SyncCredentials& credentials) OVERRIDE;
96 virtual void StartSyncingWithServer() OVERRIDE;
97 virtual void SetEncryptionPassphrase(
98 const std::string& passphrase,
99 bool is_explicit) OVERRIDE;
100 virtual bool SetDecryptionPassphrase(const std::string& passphrase)
101 OVERRIDE WARN_UNUSED_RESULT;
102 virtual void StopSyncingForShutdown() OVERRIDE;
103 virtual scoped_ptr<base::Thread> Shutdown(syncer::ShutdownReason reason)
105 virtual void UnregisterInvalidationIds() OVERRIDE;
106 virtual void ConfigureDataTypes(
107 syncer::ConfigureReason reason,
108 const DataTypeConfigStateMap& config_state_map,
109 const base::Callback<void(syncer::ModelTypeSet,
110 syncer::ModelTypeSet)>& ready_task,
111 const base::Callback<void()>& retry_callback) OVERRIDE;
112 virtual void ActivateDataType(
113 syncer::ModelType type, syncer::ModelSafeGroup group,
114 sync_driver::ChangeProcessor* change_processor) OVERRIDE;
115 virtual void DeactivateDataType(syncer::ModelType type) OVERRIDE;
116 virtual void EnableEncryptEverything() OVERRIDE;
117 virtual syncer::UserShare* GetUserShare() const OVERRIDE;
118 virtual scoped_ptr<syncer::SyncContextProxy> GetSyncContextProxy() OVERRIDE;
119 virtual Status GetDetailedStatus() OVERRIDE;
120 virtual syncer::sessions::SyncSessionSnapshot
121 GetLastSessionSnapshot() const OVERRIDE;
122 virtual bool HasUnsyncedItems() const OVERRIDE;
123 virtual bool IsNigoriEnabled() const OVERRIDE;
124 virtual syncer::PassphraseType GetPassphraseType() const OVERRIDE;
125 virtual base::Time GetExplicitPassphraseTime() const OVERRIDE;
126 virtual bool IsCryptographerReady(
127 const syncer::BaseTransaction* trans) const OVERRIDE;
128 virtual void GetModelSafeRoutingInfo(
129 syncer::ModelSafeRoutingInfo* out) const OVERRIDE;
130 virtual void RequestBufferedProtocolEventsAndEnableForwarding() OVERRIDE;
131 virtual void DisableProtocolEventForwarding() OVERRIDE;
132 virtual void EnableDirectoryTypeDebugInfoForwarding() OVERRIDE;
133 virtual void DisableDirectoryTypeDebugInfoForwarding() OVERRIDE;
134 virtual void GetAllNodesForTypes(
135 syncer::ModelTypeSet types,
136 base::Callback<void(const std::vector<syncer::ModelType>&,
137 ScopedVector<base::ListValue>)> type) OVERRIDE;
138 virtual base::MessageLoop* GetSyncLoopForTesting() OVERRIDE;
141 // The types and functions below are protected so that test
142 // subclasses can use them.
144 // Allows tests to perform alternate core initialization work.
145 virtual void InitCore(scoped_ptr<DoInitializeOptions> options);
147 // Request the syncer to reconfigure with the specfied params.
148 // Virtual for testing.
149 virtual void RequestConfigureSyncer(
150 syncer::ConfigureReason reason,
151 syncer::ModelTypeSet to_download,
152 syncer::ModelTypeSet to_purge,
153 syncer::ModelTypeSet to_journal,
154 syncer::ModelTypeSet to_unapply,
155 syncer::ModelTypeSet to_ignore,
156 const syncer::ModelSafeRoutingInfo& routing_info,
157 const base::Callback<void(syncer::ModelTypeSet,
158 syncer::ModelTypeSet)>& ready_task,
159 const base::Closure& retry_callback);
161 // Called when the syncer has finished performing a configuration.
162 void FinishConfigureDataTypesOnFrontendLoop(
163 const syncer::ModelTypeSet enabled_types,
164 const syncer::ModelTypeSet succeeded_configuration_types,
165 const syncer::ModelTypeSet failed_configuration_types,
166 const base::Callback<void(syncer::ModelTypeSet,
167 syncer::ModelTypeSet)>& ready_task);
169 // Reports backend initialization success. Includes some objects from sync
170 // manager initialization to be passed back to the UI thread.
172 // |sync_context_proxy| points to an object owned by the SyncManager.
173 // Ownership is not transferred, but we can obtain our own copy of the object
174 // using its Clone() method.
175 virtual void HandleInitializationSuccessOnFrontendLoop(
176 const syncer::WeakHandle<syncer::JsBackend> js_backend,
177 const syncer::WeakHandle<syncer::DataTypeDebugInfoListener>
179 syncer::SyncContextProxy* sync_context_proxy,
180 const std::string& cache_guid);
182 // Downloading of control types failed and will be retried. Invokes the
183 // frontend's sync configure retry method.
184 void HandleControlTypesDownloadRetry();
186 // Forwards a ProtocolEvent to the frontend. Will not be called unless a
187 // call to SetForwardProtocolEvents() explicitly requested that we start
188 // forwarding these events.
189 void HandleProtocolEventOnFrontendLoop(syncer::ProtocolEvent* event);
191 // Forwards a directory commit counter update to the frontend loop. Will not
192 // be called unless a call to EnableDirectoryTypeDebugInfoForwarding()
193 // explicitly requested that we start forwarding these events.
194 void HandleDirectoryCommitCountersUpdatedOnFrontendLoop(
195 syncer::ModelType type,
196 const syncer::CommitCounters& counters);
198 // Forwards a directory update counter update to the frontend loop. Will not
199 // be called unless a call to EnableDirectoryTypeDebugInfoForwarding()
200 // explicitly requested that we start forwarding these events.
201 void HandleDirectoryUpdateCountersUpdatedOnFrontendLoop(
202 syncer::ModelType type,
203 const syncer::UpdateCounters& counters);
205 // Forwards a directory status counter update to the frontend loop. Will not
206 // be called unless a call to EnableDirectoryTypeDebugInfoForwarding()
207 // explicitly requested that we start forwarding these events.
208 void HandleDirectoryStatusCountersUpdatedOnFrontendLoop(
209 syncer::ModelType type,
210 const syncer::StatusCounters& counters);
212 sync_driver::SyncFrontend* frontend() { return frontend_; }
215 friend class SyncBackendHostCore;
217 // Checks if we have received a notice to turn on experimental datatypes
218 // (via the nigori node) and informs the frontend if that is the case.
219 // Note: it is illegal to call this before the backend is initialized.
220 void AddExperimentalTypes();
222 // Handles backend initialization failure.
223 void HandleInitializationFailureOnFrontendLoop();
225 // Called from Core::OnSyncCycleCompleted to handle updating frontend
226 // thread components.
227 void HandleSyncCycleCompletedOnFrontendLoop(
228 const syncer::sessions::SyncSessionSnapshot& snapshot);
230 // Called when the syncer failed to perform a configuration and will
231 // eventually retry. FinishingConfigurationOnFrontendLoop(..) will be called
232 // on successful completion.
233 void RetryConfigurationOnFrontendLoop(const base::Closure& retry_callback);
235 // Helpers to persist a token that can be used to bootstrap sync encryption
236 // across browser restart to avoid requiring the user to re-enter their
237 // passphrase. |token| must be valid UTF-8 as we use the PrefService for
239 void PersistEncryptionBootstrapToken(
240 const std::string& token,
241 syncer::BootstrapTokenType token_type);
243 // For convenience, checks if initialization state is INITIALIZED.
244 bool initialized() const { return initialized_; }
246 // Let the front end handle the actionable error event.
247 void HandleActionableErrorEventOnFrontendLoop(
248 const syncer::SyncProtocolError& sync_error);
250 // Handle a migration request.
251 void HandleMigrationRequestedOnFrontendLoop(const syncer::ModelTypeSet types);
253 // Checks if |passphrase| can be used to decrypt the cryptographer's pending
254 // keys that were cached during NotifyPassphraseRequired. Returns true if
255 // decryption was successful. Returns false otherwise. Must be called with a
256 // non-empty pending keys cache.
257 bool CheckPassphraseAgainstCachedPendingKeys(
258 const std::string& passphrase) const;
260 // Invoked when a passphrase is required to decrypt a set of Nigori keys,
261 // or for encrypting. |reason| denotes why the passphrase was required.
262 // |pending_keys| is a copy of the cryptographer's pending keys, that are
263 // cached by the frontend. If there are no pending keys, or if the passphrase
264 // required reason is REASON_ENCRYPTION, an empty EncryptedData object is
266 void NotifyPassphraseRequired(syncer::PassphraseRequiredReason reason,
267 sync_pb::EncryptedData pending_keys);
269 // Invoked when the passphrase provided by the user has been accepted.
270 void NotifyPassphraseAccepted();
272 // Invoked when the set of encrypted types or the encrypt
273 // everything flag changes.
274 void NotifyEncryptedTypesChanged(
275 syncer::ModelTypeSet encrypted_types,
276 bool encrypt_everything);
278 // Invoked when sync finishes encrypting new datatypes.
279 void NotifyEncryptionComplete();
281 // Invoked when the passphrase state has changed. Caches the passphrase state
282 // for later use on the UI thread.
283 // If |type| is FROZEN_IMPLICIT_PASSPHRASE or CUSTOM_PASSPHRASE,
284 // |explicit_passphrase_time| is the time at which that passphrase was set
286 void HandlePassphraseTypeChangedOnFrontendLoop(
287 syncer::PassphraseType type,
288 base::Time explicit_passphrase_time);
290 void HandleStopSyncingPermanentlyOnFrontendLoop();
292 // Dispatched to from OnConnectionStatusChange to handle updating
293 // frontend UI components.
294 void HandleConnectionStatusChangeOnFrontendLoop(
295 syncer::ConnectionStatus status);
297 // NotificationObserver implementation.
298 virtual void Observe(
300 const content::NotificationSource& source,
301 const content::NotificationDetails& details) OVERRIDE;
303 // InvalidationHandler implementation.
304 virtual void OnInvalidatorStateChange(
305 syncer::InvalidatorState state) OVERRIDE;
306 virtual void OnIncomingInvalidation(
307 const syncer::ObjectIdInvalidationMap& invalidation_map) OVERRIDE;
308 virtual std::string GetOwnerName() const OVERRIDE;
310 content::NotificationRegistrar notification_registrar_;
312 // A reference to the MessageLoop used to construct |this|, so we know how
313 // to safely talk back to the SyncFrontend.
314 base::MessageLoop* const frontend_loop_;
316 Profile* const profile_;
318 // Name used for debugging (set from profile_->GetDebugName()).
319 const std::string name_;
321 // Our core, which communicates directly to the syncapi. Use refptr instead
322 // of WeakHandle because |core_| is created on UI loop but released on
324 scoped_refptr<SyncBackendHostCore> core_;
326 // A handle referencing the main interface for non-blocking sync types.
327 scoped_ptr<syncer::SyncContextProxy> sync_context_proxy_;
331 const base::WeakPtr<sync_driver::SyncPrefs> sync_prefs_;
333 ExtensionsActivityMonitor extensions_activity_monitor_;
335 scoped_ptr<SyncBackendRegistrar> registrar_;
337 // The frontend which we serve (and are owned by).
338 sync_driver::SyncFrontend* frontend_;
340 // We cache the cryptographer's pending keys whenever NotifyPassphraseRequired
341 // is called. This way, before the UI calls SetDecryptionPassphrase on the
342 // syncer, it can avoid the overhead of an asynchronous decryption call and
343 // give the user immediate feedback about the passphrase entered by first
344 // trying to decrypt the cached pending keys on the UI thread. Note that
345 // SetDecryptionPassphrase can still fail after the cached pending keys are
346 // successfully decrypted if the pending keys have changed since the time they
348 sync_pb::EncryptedData cached_pending_keys_;
350 // The state of the passphrase required to decrypt the bag of encryption keys
351 // in the nigori node. Updated whenever a new nigori node arrives or the user
352 // manually changes their passphrase state. Cached so we can synchronously
353 // check it from the UI thread.
354 syncer::PassphraseType cached_passphrase_type_;
356 // If an explicit passphrase is in use, the time at which the passphrase was
357 // first set (if available).
358 base::Time cached_explicit_passphrase_time_;
360 // UI-thread cache of the last SyncSessionSnapshot received from syncapi.
361 syncer::sessions::SyncSessionSnapshot last_snapshot_;
363 invalidation::InvalidationService* invalidator_;
364 bool invalidation_handler_registered_;
366 base::WeakPtrFactory<SyncBackendHostImpl> weak_ptr_factory_;
368 DISALLOW_COPY_AND_ASSIGN(SyncBackendHostImpl);
371 } // namespace browser_sync
373 #endif // CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_IMPL_H_