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      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 
     11 namespace leveldb {
     12 class WriteBatch;
     13 }
     14 
     15 namespace content {
     16 
     17 // Wrapper around leveldb::WriteBatch.
     18 // This class holds a collection of updates to apply atomically to a database.
     19 class 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