1 /* 2 * Copyright (c) 2023 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 OHOS_DISTRIBUTED_DATA_SERVICES_FRAMEWORK_STORE_STORE_AUTO_CACHE_H 17 #define OHOS_DISTRIBUTED_DATA_SERVICES_FRAMEWORK_STORE_STORE_AUTO_CACHE_H 18 #include <list> 19 #include <memory> 20 #include <shared_mutex> 21 #include <set> 22 #include "concurrent_map.h" 23 #include "error/general_error.h" 24 #include "executor_pool.h" 25 #include "metadata/store_meta_data.h" 26 #include "store/general_store.h" 27 #include "store/general_value.h" 28 #include "store/general_watcher.h" 29 #include "visibility.h" 30 namespace OHOS::DistributedData { 31 class SchemaMeta; 32 class AutoCache { 33 public: 34 using Error = GeneralError; 35 using Store = std::shared_ptr<GeneralStore>; 36 using Stores = std::list<std::shared_ptr<GeneralStore>>; 37 using Watcher = GeneralWatcher; 38 using Watchers = std::set<std::shared_ptr<GeneralWatcher>>; 39 using Time = std::chrono::steady_clock::time_point; 40 using Executor = ExecutorPool; 41 using TaskId = ExecutorPool::TaskId; 42 using Creator = std::function<GeneralStore *(const StoreMetaData &)>; 43 API_EXPORT static AutoCache &GetInstance(); 44 45 API_EXPORT int32_t RegCreator(int32_t type, Creator creator); 46 47 API_EXPORT void Bind(std::shared_ptr<Executor> executor); 48 49 API_EXPORT Store GetStore(const StoreMetaData &meta, const Watchers &watchers); 50 51 API_EXPORT Stores GetStoresIfPresent(uint32_t tokenId, const std::string &storeName = ""); 52 53 API_EXPORT void CloseStore(uint32_t tokenId, const std::string &storeId = ""); 54 55 API_EXPORT void CloseExcept(const std::set<int32_t> &users); 56 57 API_EXPORT void SetObserver(uint32_t tokenId, const std::string &storeId, const Watchers &watchers); 58 59 API_EXPORT void Enable(uint32_t tokenId, const std::string &storeId = ""); 60 61 API_EXPORT void Disable(uint32_t tokenId, const std::string &storeId); 62 63 private: 64 AutoCache(); 65 ~AutoCache(); 66 void GarbageCollect(bool isForce); 67 void StartTimer(); 68 struct Delegate : public GeneralWatcher { 69 Delegate(GeneralStore *delegate, const Watchers &watchers, int32_t user, const StoreMetaData &meta); 70 Delegate(const Delegate& delegate); 71 ~Delegate(); 72 operator Store(); 73 bool operator<(const Time &time) const; 74 bool Close(); 75 int32_t GetUser() const; 76 int32_t GetArea() const; 77 const std::string& GetDataDir() const; 78 void SetObservers(const Watchers &watchers); 79 int32_t OnChange(const Origin &origin, const PRIFields &primaryFields, ChangeInfo &&values) override; 80 int32_t OnChange(const Origin &origin, const Fields &fields, ChangeData &&datas) override; 81 void PostDataChange(const StoreMetaData &meta, const std::vector<std::string> &tables); 82 83 private: 84 mutable Time time_; 85 GeneralStore *store_ = nullptr; 86 Watchers watchers_; 87 int32_t user_; 88 const StoreMetaData meta_; 89 std::shared_mutex mutex_; 90 }; 91 92 static constexpr int64_t INTERVAL = 1; 93 static constexpr int32_t MAX_CREATOR_NUM = 30; 94 95 std::shared_ptr<Executor> executor_; 96 TaskId taskId_ = Executor::INVALID_TASK_ID; 97 ConcurrentMap<uint32_t, std::map<std::string, Delegate>> stores_; 98 ConcurrentMap<uint32_t, std::set<std::string>> disables_; 99 Creator creators_[MAX_CREATOR_NUM]; 100 std::set<std::string> disableStores_; 101 }; 102 } // namespace OHOS::DistributedData 103 #endif // OHOS_DISTRIBUTED_DATA_SERVICES_FRAMEWORK_STORE_STORE_AUTO_CACHE_H