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 #ifndef SYNC_SYNCABLE_DEFERRED_ON_DISK_DIRECTORY_BACKING_STORE_H_ 6 #define SYNC_SYNCABLE_DEFERRED_ON_DISK_DIRECTORY_BACKING_STORE_H_ 7 8 #include "base/files/file_path.h" 9 #include "sync/base/sync_export.h" 10 #include "sync/syncable/directory_backing_store.h" 11 12 namespace syncer { 13 namespace syncable { 14 15 // Store used for backing up user's data before first sync. It creates an 16 // in-memory store first and switch to on-disk store if SaveChanges() is 17 // called, which only happens when SyncBackupManager is shut down and a 18 // syncing backend is to be created. Thus we guarantee that user data is not 19 // persisted until user is actually going to sync. 20 class SYNC_EXPORT_PRIVATE DeferredOnDiskDirectoryBackingStore 21 : public DirectoryBackingStore { 22 public: 23 DeferredOnDiskDirectoryBackingStore(const std::string& dir_name, 24 const base::FilePath& backing_filepath); 25 virtual ~DeferredOnDiskDirectoryBackingStore(); 26 virtual DirOpenResult Load( 27 Directory::MetahandlesMap* handles_map, 28 JournalIndex* delete_journals, 29 Directory::KernelLoadInfo* kernel_load_info) OVERRIDE; 30 virtual bool SaveChanges(const Directory::SaveChangesSnapshot& snapshot) 31 OVERRIDE; 32 33 private: 34 base::FilePath backing_filepath_; 35 36 // Whether current DB is on disk. 37 bool db_is_on_disk_; 38 39 DISALLOW_COPY_AND_ASSIGN(DeferredOnDiskDirectoryBackingStore); 40 }; 41 42 } // namespace syncable 43 } // namespace syncer 44 45 #endif // SYNC_SYNCABLE_DEFERRED_ON_DISK_DIRECTORY_BACKING_STORE_H_ 46