1 // Copyright (c) 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.
5 #ifndef CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_H_
6 #define CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_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/threading/thread.h"
15 #include "components/sync_driver/backend_data_type_configurer.h"
16 #include "sync/internal_api/public/base/model_type.h"
17 #include "sync/internal_api/public/configure_reason.h"
18 #include "sync/internal_api/public/sessions/sync_session_snapshot.h"
19 #include "sync/internal_api/public/shutdown_reason.h"
20 #include "sync/internal_api/public/sync_context_proxy.h"
21 #include "sync/internal_api/public/sync_manager.h"
22 #include "sync/internal_api/public/sync_manager_factory.h"
23 #include "sync/internal_api/public/util/report_unrecoverable_error_function.h"
24 #include "sync/internal_api/public/util/unrecoverable_error_handler.h"
25 #include "sync/internal_api/public/util/weak_handle.h"
34 class NetworkResources;
35 class SyncManagerFactory;
38 namespace sync_driver {
39 class ChangeProcessor;
43 namespace browser_sync {
45 class SyncedDeviceTracker;
47 // An API to "host" the top level SyncAPI element.
49 // This class handles dispatch of potentially blocking calls to appropriate
50 // threads and ensures that the SyncFrontend is only accessed on the UI loop.
51 class SyncBackendHost : public sync_driver::BackendDataTypeConfigurer {
53 typedef syncer::SyncStatus Status;
55 // Stubs used by implementing classes.
57 virtual ~SyncBackendHost();
59 // Called on the frontend's thread to kick off asynchronous initialization.
60 // Optionally deletes the "Sync Data" folder during init in order to make
61 // sure we're starting fresh.
63 // |report_unrecoverable_error_function| can be NULL. Note:
64 // |unrecoverable_error_handler| may be invoked from any thread.
65 virtual void Initialize(
66 sync_driver::SyncFrontend* frontend,
67 scoped_ptr<base::Thread> sync_thread,
68 const syncer::WeakHandle<syncer::JsEventHandler>& event_handler,
69 const GURL& service_url,
70 const syncer::SyncCredentials& credentials,
71 bool delete_sync_data_folder,
72 scoped_ptr<syncer::SyncManagerFactory> sync_manager_factory,
73 scoped_ptr<syncer::UnrecoverableErrorHandler> unrecoverable_error_handler,
74 syncer::ReportUnrecoverableErrorFunction
75 report_unrecoverable_error_function,
76 syncer::NetworkResources* network_resources) = 0;
78 // Called on the frontend's thread to update SyncCredentials.
79 virtual void UpdateCredentials(
80 const syncer::SyncCredentials& credentials) = 0;
82 // This starts the SyncerThread running a Syncer object to communicate with
83 // sync servers. Until this is called, no changes will leave or enter this
84 // browser from the cloud / sync servers.
85 // Called on |frontend_loop_|.
86 virtual void StartSyncingWithServer() = 0;
88 // Called on |frontend_loop_| to asynchronously set a new passphrase for
89 // encryption. Note that it is an error to call SetEncryptionPassphrase under
90 // the following circumstances:
91 // - An explicit passphrase has already been set
92 // - |is_explicit| is true and we have pending keys.
93 // When |is_explicit| is false, a couple of things could happen:
94 // - If there are pending keys, we try to decrypt them. If decryption works,
95 // this acts like a call to SetDecryptionPassphrase. If not, the GAIA
96 // passphrase passed in is cached so we can re-encrypt with it in future.
97 // - If there are no pending keys, data is encrypted with |passphrase| (this
98 // is a no-op if data was already encrypted with |passphrase|.)
99 virtual void SetEncryptionPassphrase(
100 const std::string& passphrase,
101 bool is_explicit) = 0;
103 // Called on |frontend_loop_| to use the provided passphrase to asynchronously
104 // attempt decryption. Returns false immediately if the passphrase could not
105 // be used to decrypt a locally cached copy of encrypted keys; returns true
106 // otherwise. If new encrypted keys arrive during the asynchronous call,
107 // OnPassphraseRequired may be triggered at a later time. It is an error to
108 // call this when there are no pending keys.
109 virtual bool SetDecryptionPassphrase(const std::string& passphrase)
110 WARN_UNUSED_RESULT = 0;
112 // Called on |frontend_loop_| to kick off shutdown procedure. Attempts to cut
113 // short any long-lived or blocking sync thread tasks so that the shutdown on
114 // sync thread task that we're about to post won't have to wait very long.
115 virtual void StopSyncingForShutdown() = 0;
117 // Called on |frontend_loop_| to kick off shutdown.
118 // See the implementation and Core::DoShutdown for details.
119 // Must be called *after* StopSyncingForShutdown.
120 // For any reason other than BROWSER_SHUTDOWN, caller should claim sync
122 // * during browser shutdown sync thread is not claimed to avoid blocking
123 // browser shutdown on sync shutdown.
124 // * otherwise sync thread is claimed so that if sync backend is recreated
125 // later, initialization of new backend is serialized on previous sync
126 // thread after cleanup of previous backend to avoid old/new backends
127 // interfere with each other.
128 virtual scoped_ptr<base::Thread> Shutdown(syncer::ShutdownReason reason) = 0;
130 // Removes all current registrations from the backend on the
131 // InvalidationService.
132 virtual void UnregisterInvalidationIds() = 0;
134 // Changes the set of data types that are currently being synced.
135 // The ready_task will be run when configuration is done with the
136 // set of all types that failed configuration (i.e., if its argument
137 // is non-empty, then an error was encountered).
138 virtual void ConfigureDataTypes(
139 syncer::ConfigureReason reason,
140 const DataTypeConfigStateMap& config_state_map,
141 const base::Callback<void(syncer::ModelTypeSet,
142 syncer::ModelTypeSet)>& ready_task,
143 const base::Callback<void()>& retry_callback) OVERRIDE = 0;
145 // Turns on encryption of all present and future sync data.
146 virtual void EnableEncryptEverything() = 0;
148 // Called on |frontend_loop_| to obtain a handle to the UserShare needed for
149 // creating transactions. Should not be called before we signal
150 // initialization is complete with OnBackendInitialized().
151 virtual syncer::UserShare* GetUserShare() const = 0;
153 // Called on |frontend_loop_| to obtain a handle to the SyncContext needed by
154 // the non-blocking sync types to communicate with the server.
156 // Should be called only when the backend is initialized.
157 virtual scoped_ptr<syncer::SyncContextProxy> GetSyncContextProxy() = 0;
159 // Called from any thread to obtain current status information in detailed or
161 virtual Status GetDetailedStatus() = 0;
162 virtual syncer::sessions::SyncSessionSnapshot
163 GetLastSessionSnapshot() const = 0;
165 // Determines if the underlying sync engine has made any local changes to
166 // items that have not yet been synced with the server.
167 // ONLY CALL THIS IF OnInitializationComplete was called!
168 virtual bool HasUnsyncedItems() const = 0;
170 // Whether or not we are syncing encryption keys.
171 virtual bool IsNigoriEnabled() const = 0;
173 // Returns the type of passphrase being used to encrypt data. See
174 // sync_encryption_handler.h.
175 virtual syncer::PassphraseType GetPassphraseType() const = 0;
177 // If an explicit passphrase is in use, returns the time at which that
178 // passphrase was set (if available).
179 virtual base::Time GetExplicitPassphraseTime() const = 0;
181 // True if the cryptographer has any keys available to attempt decryption.
182 // Could mean we've downloaded and loaded Nigori objects, or we bootstrapped
183 // using a token previously received.
184 virtual bool IsCryptographerReady(
185 const syncer::BaseTransaction* trans) const = 0;
187 virtual void GetModelSafeRoutingInfo(
188 syncer::ModelSafeRoutingInfo* out) const = 0;
190 // Fetches the DeviceInfo tracker.
191 virtual SyncedDeviceTracker* GetSyncedDeviceTracker() const = 0;
193 // Requests that the backend forward to the fronent any protocol events in
194 // its buffer and begin forwarding automatically from now on. Repeated calls
195 // to this function may result in the same events being emitted several
197 virtual void RequestBufferedProtocolEventsAndEnableForwarding() = 0;
199 // Disables protocol event forwarding.
200 virtual void DisableProtocolEventForwarding() = 0;
202 // Returns a ListValue representing all nodes for the specified types through
203 // |callback| on this thread.
204 virtual void GetAllNodesForTypes(
205 syncer::ModelTypeSet types,
206 base::Callback<void(const std::vector<syncer::ModelType>&,
207 ScopedVector<base::ListValue>)> type) = 0;
209 // Enables the sending of directory type debug counters. Also, for every
210 // time it is called, it makes an explicit request that updates to an update
211 // for all counters be emitted.
212 virtual void EnableDirectoryTypeDebugInfoForwarding() = 0;
214 // Disables the sending of directory type debug counters.
215 virtual void DisableDirectoryTypeDebugInfoForwarding() = 0;
217 virtual base::MessageLoop* GetSyncLoopForTesting() = 0;
219 DISALLOW_COPY_AND_ASSIGN(SyncBackendHost);
222 } // namespace browser_sync
224 #endif // CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_H_