ob_file_writer.h

/* Copyright (c) 2021 OceanBase and/or its affiliates. All rights reserved.
miniob is licensed under Mulan PSL v2.
You can use this software according to the terms and conditions of the Mulan PSL v2.
You may obtain a copy of Mulan PSL v2 at:
         http://license.coscl.org.cn/MulanPSL2
THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
See the Mulan PSL v2 for more details. */
 
#pragma once
 
#include "common/lang/fstream.h"
#include "common/lang/string.h"
#include "common/lang/string_view.h"
#include "common/lang/memory.h"
#include "common/sys/rc.h"
 
namespace oceanbase {
 
class ObFileWriter
{
public:
  ObFileWriter(const string &filename, bool append = false) : filename_(filename), append_(append) {}
 
  ~ObFileWriter();
 
  RC open_file();
 
  void close_file();
 
  RC write(const string_view &data);
 
  RC flush();
 
  bool is_open() const { return file_.is_open(); }
 
  string file_name() const { return filename_; }
 
  static unique_ptr<ObFileWriter> create_file_writer(const string &filename, bool append);
 
private:
  string filename_;
 
  bool append_;
 
  ofstream file_;
};
}  // namespace oceanbase