1/*
2 * Copyright (C) 2011 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1.  Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 * 2.  Redistributions in binary form must reproduce the above copyright
11 *     notice, this list of conditions and the following disclaimer in the
12 *     documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef LevelDBWriteBatch_h
27#define LevelDBWriteBatch_h
28
29#if USE(LEVELDB)
30
31#include <memory>
32
33namespace leveldb {
34class WriteBatch;
35}
36
37namespace WebCore {
38
39class LevelDBSlice;
40
41// Wrapper around leveldb::WriteBatch.
42// This class holds a collection of updates to apply atomically to a database.
43class LevelDBWriteBatch {
44public:
45    LevelDBWriteBatch();
46    ~LevelDBWriteBatch();
47
48    void put(const LevelDBSlice& key, const LevelDBSlice& value);
49    void remove(const LevelDBSlice& key); // Add remove operation to the batch.
50    void clear();
51
52private:
53    friend class LevelDBDatabase;
54
55    std::unique_ptr<leveldb::WriteBatch> m_writeBatch;
56};
57
58}
59
60#endif // USE(LEVELDB)
61
62#endif // LevelDBWriteBatch_h
63