leveldb_database.h revision d0247b1b59f9c528cb6df88b4f2b9afaf80d181e
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_DATABASE_H_ 6#define CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_DATABASE_H_ 7 8#include <string> 9 10#include "base/files/file_path.h" 11#include "base/memory/scoped_ptr.h" 12#include "base/strings/string16.h" 13#include "base/strings/string_piece.h" 14#include "content/common/content_export.h" 15#include "third_party/leveldatabase/src/include/leveldb/status.h" 16 17namespace leveldb { 18class Comparator; 19class DB; 20class Env; 21class Snapshot; 22} 23 24namespace content { 25 26class LevelDBComparator; 27class LevelDBDatabase; 28class LevelDBIterator; 29class LevelDBWriteBatch; 30 31class LevelDBSnapshot { 32 private: 33 friend class LevelDBDatabase; 34 friend class LevelDBTransaction; 35 36 explicit LevelDBSnapshot(LevelDBDatabase* db); 37 ~LevelDBSnapshot(); 38 39 leveldb::DB* db_; 40 const leveldb::Snapshot* snapshot_; 41}; 42 43class CONTENT_EXPORT LevelDBDatabase { 44 public: 45 static leveldb::Status Open(const base::FilePath& file_name, 46 const LevelDBComparator* comparator, 47 scoped_ptr<LevelDBDatabase>* db, 48 bool* is_disk_full = 0); 49 static scoped_ptr<LevelDBDatabase> OpenInMemory( 50 const LevelDBComparator* comparator); 51 static bool Destroy(const base::FilePath& file_name); 52 virtual ~LevelDBDatabase(); 53 54 bool Put(const base::StringPiece& key, std::string* value); 55 bool Remove(const base::StringPiece& key); 56 virtual bool Get(const base::StringPiece& key, 57 std::string* value, 58 bool* found, 59 const LevelDBSnapshot* = 0); 60 bool Write(const LevelDBWriteBatch& write_batch); 61 scoped_ptr<LevelDBIterator> CreateIterator(const LevelDBSnapshot* = 0); 62 const LevelDBComparator* Comparator() const; 63 64 protected: 65 LevelDBDatabase(); 66 67 private: 68 friend class LevelDBSnapshot; 69 70 scoped_ptr<leveldb::Env> env_; 71 scoped_ptr<leveldb::Comparator> comparator_adapter_; 72 scoped_ptr<leveldb::DB> db_; 73 const LevelDBComparator* comparator_; 74}; 75 76} // namespace content 77 78#endif // CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_DATABASE_H_ 79