components/leveldb_proto/leveldb_database.h

   1 // Copyright 2014 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 COMPONENTS_LEVELDB_PROTO_LEVELDB_DATABASE_H_
   6 #define COMPONENTS_LEVELDB_PROTO_LEVELDB_DATABASE_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/files/file_path.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/strings/string_split.h"
  14 #include "base/threading/thread_collision_warner.h"
  15
  16 namespace leveldb {
  17 class DB;
  18 class Env;
  19 struct Options;
  20 }  // namespace leveldb
  21
  22 namespace leveldb_proto {
  23
  24 // Interacts with the LevelDB third party module.
  25 // Once constructed, function calls and destruction should all occur on the
  26 // same thread (not necessarily the same as the constructor).
  27 class LevelDB {
  28  public:
  29   LevelDB();
  30   virtual ~LevelDB();
  31
  32   virtual bool InitWithOptions(const base::FilePath& database_dir,
  33                                const leveldb::Options& options);
  34   virtual bool Init(const base::FilePath& database_dir);
  35   virtual bool Save(const base::StringPairs& pairs_to_save,
  36                     const std::vector<std::string>& keys_to_remove);
  37   virtual bool Load(std::vector<std::string>* entries);
  38
  39  private:
  40   DFAKE_MUTEX(thread_checker_);
  41
  42   // The declaration order of these members matters: |db_| depends on |env_| and
  43   // therefore has to be destructed first.
  44   scoped_ptr<leveldb::Env> env_;
  45   scoped_ptr<leveldb::DB> db_;
  46 };
  47
  48 }  // namespace leveldb_proto
  49
  50 #endif  // COMPONENTS_LEVELDB_PROTO_LEVELDB_DATABASE_H_