[SyncFS] Replace leveldb classes with LevelDBWrapper

chrome/browser/sync_file_system/drive_backend/metadata_database_index.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_METADATA_DATABASE_INDEX_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_METADATA_DATABASE_INDEX_H_
 
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/containers/hash_tables.h"
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/memory/scoped_vector.h"
 #include "chrome/browser/sync_file_system/drive_backend/metadata_database_index_interface.h"
 #include "chrome/browser/sync_file_system/drive_backend/tracker_id_set.h"
 
-namespace leveldb {
-class DB;
-class WriteBatch;
-}
-
 namespace sync_file_system {
 namespace drive_backend {
 
 class FileMetadata;
 class FileTracker;
+class LevelDBWrapper;
 class ServiceMetadata;
 
 }  // namespace drive_backend
 }  // namespace sync_file_system
 
 namespace BASE_HASH_NAMESPACE {
 
 #if defined(COMPILER_GCC)
 template<> struct hash<sync_file_system::drive_backend::ParentIDAndTitle> {
   std::size_t operator()(
@@ skipping 18 matching lines @@
   ~DatabaseContents();
   ScopedVector<FileMetadata> file_metadata;
   ScopedVector<FileTracker> file_trackers;
 };
 
 // Maintains indexes of MetadataDatabase on memory.
 class MetadataDatabaseIndex : public MetadataDatabaseIndexInterface {
  public:
   virtual ~MetadataDatabaseIndex();
 
-  static scoped_ptr<MetadataDatabaseIndex> Create(
-      leveldb::DB* db, leveldb::WriteBatch* batch);
+  static scoped_ptr<MetadataDatabaseIndex> Create(LevelDBWrapper* db);
   static scoped_ptr<MetadataDatabaseIndex> CreateForTesting(
       DatabaseContents* contents);
 
   // MetadataDatabaseIndexInterface overrides.
   virtual bool GetFileMetadata(
       const std::string& file_id, FileMetadata* metadata) const OVERRIDE;
   virtual bool GetFileTracker(
       int64 tracker_id, FileTracker* tracker) const OVERRIDE;
-  virtual void StoreFileMetadata(
-      scoped_ptr<FileMetadata> metadata, leveldb::WriteBatch* batch) OVERRIDE;
-  virtual void StoreFileTracker(
-      scoped_ptr<FileTracker> tracker, leveldb::WriteBatch* batch) OVERRIDE;
-  virtual void RemoveFileMetadata(
-      const std::string& file_id, leveldb::WriteBatch* batch) OVERRIDE;
-  virtual void RemoveFileTracker(
-      int64 tracker_id, leveldb::WriteBatch* batch) OVERRIDE;
+  virtual void StoreFileMetadata(scoped_ptr<FileMetadata> metadata) OVERRIDE;
+  virtual void StoreFileTracker(scoped_ptr<FileTracker> tracker) OVERRIDE;
+  virtual void RemoveFileMetadata(const std::string& file_id) OVERRIDE;
+  virtual void RemoveFileTracker(int64 tracker_id) OVERRIDE;
   virtual TrackerIDSet GetFileTrackerIDsByFileID(
       const std::string& file_id) const OVERRIDE;
   virtual int64 GetAppRootTracker(const std::string& app_id) const OVERRIDE;
   virtual TrackerIDSet GetFileTrackerIDsByParentAndTitle(
       int64 parent_tracker_id,
       const std::string& title) const OVERRIDE;
   virtual std::vector<int64> GetFileTrackerIDsByParent(
       int64 parent_tracker_id) const OVERRIDE;
   virtual std::string PickMultiTrackerFileID() const OVERRIDE;
   virtual ParentIDAndTitle PickMultiBackingFilePath() const OVERRIDE;
   virtual int64 PickDirtyTracker() const OVERRIDE;
-  virtual void DemoteDirtyTracker(
-      int64 tracker_id, leveldb::WriteBatch* batch) OVERRIDE;
+  virtual void DemoteDirtyTracker(int64 tracker_id) OVERRIDE;
   virtual bool HasDemotedDirtyTracker() const OVERRIDE;
-  virtual void PromoteDemotedDirtyTrackers(leveldb::WriteBatch* batch) OVERRIDE;
+  virtual void PromoteDemotedDirtyTrackers() OVERRIDE;
   virtual size_t CountDirtyTracker() const OVERRIDE;
   virtual size_t CountFileMetadata() const OVERRIDE;
   virtual size_t CountFileTracker() const OVERRIDE;
-  virtual void SetSyncRootTrackerID(int64 sync_root_id,
-                                    leveldb::WriteBatch* batch) const OVERRIDE;
-  virtual void SetLargestChangeID(int64 largest_change_id,
-                                  leveldb::WriteBatch* batch) const OVERRIDE;
-  virtual void SetNextTrackerID(int64 next_tracker_id,
-                                leveldb::WriteBatch* batch) const OVERRIDE;
+  virtual void SetSyncRootTrackerID(int64 sync_root_id) const OVERRIDE;
+  virtual void SetLargestChangeID(int64 largest_change_id) const OVERRIDE;
+  virtual void SetNextTrackerID(int64 next_tracker_id) const OVERRIDE;
   virtual int64 GetSyncRootTrackerID() const OVERRIDE;
   virtual int64 GetLargestChangeID() const OVERRIDE;
   virtual int64 GetNextTrackerID() const OVERRIDE;
   virtual std::vector<std::string> GetRegisteredAppIDs() const OVERRIDE;
   virtual std::vector<int64> GetAllTrackerIDs() const OVERRIDE;
   virtual std::vector<std::string> GetAllMetadataIDs() const OVERRIDE;
 
  private:
   typedef base::ScopedPtrHashMap<std::string, FileMetadata> MetadataByID;
   typedef base::ScopedPtrHashMap<int64, FileTracker> TrackerByID;
   typedef base::hash_map<std::string, TrackerIDSet> TrackerIDsByFileID;
   typedef base::hash_map<std::string, TrackerIDSet> TrackerIDsByTitle;
   typedef std::map<int64, TrackerIDsByTitle> TrackerIDsByParentAndTitle;
   typedef base::hash_map<std::string, int64> TrackerIDByAppID;
   typedef base::hash_set<std::string> FileIDSet;
   typedef base::hash_set<ParentIDAndTitle> PathSet;
   typedef std::set<int64> DirtyTrackers;
 
   friend class MetadataDatabaseTest;
 
-  MetadataDatabaseIndex();
+  explicit MetadataDatabaseIndex(LevelDBWrapper* db);
   void Initialize(scoped_ptr<ServiceMetadata> service_metadata,
                   DatabaseContents* contents);
 
   // Maintains |app_root_by_app_id_|.
   void AddToAppIDIndex(const FileTracker& new_tracker);
   void UpdateInAppIDIndex(const FileTracker& old_tracker,
                           const FileTracker& new_tracker);
   void RemoveFromAppIDIndex(const FileTracker& tracker);
 
   // Maintains |trackers_by_file_id_| and |multi_tracker_file_ids_|.
   void AddToFileIDIndexes(const FileTracker& new_tracker);
   void UpdateInFileIDIndexes(const FileTracker& old_tracker,
                              const FileTracker& new_tracker);
   void RemoveFromFileIDIndexes(const FileTracker& tracker);
 
   // Maintains |trackers_by_parent_and_title_| and |multi_backing_file_paths_|.
   void AddToPathIndexes(const FileTracker& new_tracker);
   void UpdateInPathIndexes(const FileTracker& old_tracker,
                            const FileTracker& new_tracker1);
   void RemoveFromPathIndexes(const FileTracker& tracker);
 
   // Maintains |dirty_trackers_| and |demoted_dirty_trackers_|.
   void AddToDirtyTrackerIndexes(const FileTracker& new_tracker);
   void UpdateInDirtyTrackerIndexes(const FileTracker& old_tracker,
                                    const FileTracker& new_tracker);
   void RemoveFromDirtyTrackerIndexes(const FileTracker& tracker);
 
   scoped_ptr<ServiceMetadata> service_metadata_;
+  LevelDBWrapper* db_;  // Not owned
 
   MetadataByID metadata_by_id_;
   TrackerByID tracker_by_id_;
 
   TrackerIDByAppID app_root_by_app_id_;
 
   TrackerIDsByFileID trackers_by_file_id_;
   FileIDSet multi_tracker_file_ids_;
 
   TrackerIDsByParentAndTitle trackers_by_parent_and_title_;
   PathSet multi_backing_file_paths_;
 
   DirtyTrackers dirty_trackers_;
   DirtyTrackers demoted_dirty_trackers_;
 
   DISALLOW_COPY_AND_ASSIGN(MetadataDatabaseIndex);
 };
 
 }  // namespace drive_backend
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_METADATA_DATABASE_INDEX_H_