ob_compaction.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 "oblsm/table/ob_sstable.h"
#include "oblsm/include/ob_lsm_options.h"
 
namespace oceanbase {
 
class ObCompactionPicker;
 
class ObCompaction
{
public:
  friend class ObCompactionPicker;
  friend class TiredCompactionPicker;
  friend class LeveledCompactionPicker;
 
  explicit ObCompaction(int level) : level_(level) {}
 
  ~ObCompaction() = default;
 
  int level() const { return level_; }
 
  shared_ptr<ObSSTable> input(int which, int i) const { return inputs_[which][i]; }
 
  int size() const { return inputs_[0].size() + inputs_[1].size(); }
 
  const vector<shared_ptr<ObSSTable>> &inputs(int which) const { return inputs_[which]; }
 
private:
  std::vector<shared_ptr<ObSSTable>> inputs_[2];
 
  int level_;
};
 
}  // namespace oceanbase