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 <wtf/OwnPtr.h>
32#include <wtf/PassOwnPtr.h>
33
34namespace leveldb {
35class WriteBatch;
36}
37
38namespace WebCore {
39
40class LevelDBSlice;
41
42// Wrapper around leveldb::WriteBatch.
43// This class holds a collection of updates to apply atomically to a database.
44class LevelDBWriteBatch {
45public:
46    static PassOwnPtr<LevelDBWriteBatch> create();
47    ~LevelDBWriteBatch();
48
49    void put(const LevelDBSlice& key, const LevelDBSlice& value);
50    void remove(const LevelDBSlice& key); // Add remove operation to the batch.
51    void clear();
52
53private:
54    friend class LevelDBDatabase;
55    LevelDBWriteBatch();
56
57    OwnPtr<leveldb::WriteBatch> m_writeBatch;
58};
59
60}
61
62#endif // USE(LEVELDB)
63
64#endif // LevelDBWriteBatch_h
65