leveldb_write_batch.h revision 7dbb3d5cf0c15f500944d211057644d6a2f37371
1// Copyright (c) 2013 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 CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_WRITE_BATCH_H_
6#define CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_WRITE_BATCH_H_
7
8#include "base/memory/scoped_ptr.h"
9#include "base/strings/string_piece.h"
10
11namespace leveldb {
12class WriteBatch;
13}
14
15namespace content {
16
17// Wrapper around leveldb::WriteBatch.
18// This class holds a collection of updates to apply atomically to a database.
19class LevelDBWriteBatch {
20 public:
21  static scoped_ptr<LevelDBWriteBatch> Create();
22  ~LevelDBWriteBatch();
23
24  void Put(const base::StringPiece& key, const base::StringPiece& value);
25  void Remove(const base::StringPiece& key);  // Add remove operation to the
26                                              // batch.
27  void Clear();
28
29 private:
30  friend class LevelDBDatabase;
31  LevelDBWriteBatch();
32
33  scoped_ptr<leveldb::WriteBatch> write_batch_;
34};
35
36}  // namespace content
37
38#endif  // CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_WRITE_BATCH_H_
39