1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef STORAGE_EXECUTOR_H 17 #define STORAGE_EXECUTOR_H 18 19 #include "macro_utils.h" 20 21 namespace DistributedDB { 22 enum EngineState { 23 INVALID = -1, // default value, representative database is not generated 24 CACHEDB, 25 ATTACHING, // main db and cache db attach together 26 MIGRATING, // begine to Migrate data 27 MAINDB, 28 ENGINE_BUSY, // In order to change handle during the migration process, it is temporarily unavailable 29 }; 30 31 class StorageExecutor { 32 public: 33 explicit StorageExecutor(bool writable); 34 virtual ~StorageExecutor(); 35 36 // Delete the copy and assign constructors 37 DISABLE_COPY_ASSIGN_MOVE(StorageExecutor); 38 39 virtual bool GetWritable() const; 40 41 virtual int CheckCorruptedStatus(int errCode) const; 42 43 virtual bool GetCorruptedStatus() const; 44 45 virtual void SetCorruptedStatus() const; 46 47 virtual int Reset() = 0; 48 49 protected: 50 bool writable_; 51 mutable bool isCorrupted_; 52 }; 53 } // namespace DistributedDB 54 55 #endif // STORAGE_EXECUTOR_H 56