default_handler.h

/* Copyright (c) 2021 Xie Meiyi(xiemeiyi@hust.edu.cn) and 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. */
 
//
// Created by Meiyi & Longda on 2021/5/11.
//
#pragma once
 
#include "storage/db/db.h"
#include "common/lang/span.h"
#include "common/lang/map.h"
#include "common/lang/string.h"
#include "common/lang/memory.h"
 
class Trx;
class TrxKit;
 
class DefaultHandler
{
public:
  DefaultHandler();
 
  virtual ~DefaultHandler() noexcept;
 
  RC   init(const char *base_dir, const char *trx_kit_name, const char *log_handler_name, const char *storage_engine);
  void destroy();
 
  RC create_db(const char *dbname);
 
  RC drop_db(const char *dbname);
 
  RC open_db(const char *dbname);
 
  RC close_db(const char *dbname);
 
  RC create_table(const char *dbname, const char *relation_name, span<const AttrInfoSqlNode> attributes);
 
  RC drop_table(const char *dbname, const char *relation_name);
 
public:
  Db    *find_db(const char *dbname) const;
  Table *find_table(const char *dbname, const char *table_name) const;
 
  RC sync();
 
private:
  filesystem::path  base_dir_;          
  filesystem::path  db_dir_;            
  string            trx_kit_name_;      
  string            log_handler_name_;  
  map<string, Db *> opened_dbs_;        
  string            storage_engine_;    
};