in_memory_directory_backing_store.h revision 5821806d5e7f356e8fa4b058a389a808ea183019 
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.
4
5#ifndef SYNC_SYNCABLE_IN_MEMORY_DIRECTORY_BACKING_STORE_H_
6#define SYNC_SYNCABLE_IN_MEMORY_DIRECTORY_BACKING_STORE_H_
7
8#include "sync/syncable/directory_backing_store.h"
9
10namespace syncer {
11namespace syncable {
12
13// This implementation of DirectoryBackingStore is used in tests that do not
14// require us to write to a file.  An in-memory sqlite database is much faster
15// than an on-disk database, so this can result in significant speedups in our
16// unit tests.
17//
18// An InMemoryDirectoryBackingStore cannot load data from existing databases.
19// When an InMemoryDirectoryBackingStore is destroyed, all data stored in this
20// database is lost.  If these limitations are a problem for you, consider using
21// TestDirectoryBackingStore.
22class InMemoryDirectoryBackingStore : public DirectoryBackingStore {
23 public:
24  explicit InMemoryDirectoryBackingStore(const std::string& dir_name);
25  virtual DirOpenResult Load(
26      MetahandlesIndex* entry_bucket,
27      Directory::KernelLoadInfo* kernel_load_info) OVERRIDE;
28};
29
30}  // namespace syncable
31}  // namespace syncer
32
33#endif  // SYNC_SYNCABLE_IN_MEMORY_DIRECTORY_BACKING_STORE_H_
34