ob_lsm_transaction.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/sys/rc.h"
#include "common/lang/string_view.h"
#include "common/lang/string.h"
#include "oblsm/include/ob_lsm_iterator.h"
#include "oblsm/include/ob_lsm_options.h"
#include "oblsm/include/ob_lsm.h"
#include "oblsm/memtable/ob_skiplist.h"
#include "oblsm/util/ob_arena.h"
#include "oblsm/util/ob_coding.h"
#include "common/lang/map.h"
 
namespace oceanbase {
 
class ObLsmTransaction
{
public:
  ObLsmTransaction(ObLsm *db, uint64_t ts);
 
  ~ObLsmTransaction() = default;
 
  /*
   * @brief Retrieves the value associated with a given key.
   *
   * @param key The key to look up within the database.
   * @param value A pointer to a string where the associated value will be stored, if found.
   */
  RC get(const string_view &key, string *value);
 
  RC put(const string_view &key, const string_view &value);
 
  RC remove(const string_view &key);
 
  ObLsmIterator *new_iterator(ObLsmReadOptions options);
 
  RC commit();
 
  RC rollback();
 
private:
  [[maybe_unused]] ObLsm *db_ = nullptr;
 
  [[maybe_unused]] uint64_t ts_ = 0;
 
  map<string, string> inner_store_;
};
 
class TrxInnerMapIterator : public ObLsmIterator
{};
}  // namespace oceanbase