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// Copyright 2012 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 SYNC_SYNCABLE_ON_DISK_DIRECTORY_BACKING_STORE_H_
#define SYNC_SYNCABLE_ON_DISK_DIRECTORY_BACKING_STORE_H_
#include <string>
#include "base/files/file_path.h"
#include "sync/base/sync_export.h"
#include "sync/syncable/directory_backing_store.h"
namespace syncer {
namespace syncable {
// This is the concrete class that provides a useful implementation of
// DirectoryBackingStore.
class SYNC_EXPORT OnDiskDirectoryBackingStore : public DirectoryBackingStore {
public:
OnDiskDirectoryBackingStore(const std::string& dir_name,
const base::FilePath& backing_file_path);
~OnDiskDirectoryBackingStore() override;
DirOpenResult Load(Directory::MetahandlesMap* handles_map,
JournalIndex* delete_journals,
MetahandleSet* metahandles_to_purge,
Directory::KernelLoadInfo* kernel_load_info) override;
protected:
// Subclasses may override this to avoid a possible DCHECK.
virtual void ReportFirstTryOpenFailure();
// Returns the file path of the back store.
const base::FilePath& backing_file_path() const;
private:
// A helper function that will make one attempt to load the directory.
// Unlike Load(), it does not attempt to recover from failure.
DirOpenResult TryLoad(Directory::MetahandlesMap* handles_map,
JournalIndex* delete_journals,
MetahandleSet* metahandles_to_purge,
Directory::KernelLoadInfo* kernel_load_info);
// The path to the sync DB.
const base::FilePath backing_file_path_;
DISALLOW_COPY_AND_ASSIGN(OnDiskDirectoryBackingStore);
};
} // namespace syncable
} // namespace syncer
#endif // SYNC_SYNCABLE_ON_DISK_DIRECTORY_BACKING_STORE_H_
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