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