1 /* 2 * Copyright (c) 2022 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_SERVICE_KVDB_STORE_CACHE_H 17 #define OHOS_DISTRIBUTED_DATA_SERVICE_KVDB_STORE_CACHE_H 18 #include <chrono> 19 #include <kv_store_delegate_manager.h> 20 #include <memory> 21 #include <shared_mutex> 22 23 #include "concurrent_map.h" 24 #include "executor_pool.h" 25 #include "ikvstore_observer.h" 26 #include "kv_store_nb_delegate.h" 27 #include "metadata/store_meta_data.h" 28 #include "refbase.h" 29 30 namespace OHOS::DistributedKv { 31 class StoreCache { 32 public: 33 template<class T> 34 struct Less { 35 public: operatorLess36 bool operator()(const sptr<T> &x, const sptr<T> &y) const 37 { 38 return x.GetRefPtr() < y.GetRefPtr(); 39 } 40 }; 41 using DBStatus = DistributedDB::DBStatus; 42 using DBStore = DistributedDB::KvStoreNbDelegate; 43 using Store = std::shared_ptr<DBStore>; 44 using DBManager = DistributedDB::KvStoreDelegateManager; 45 using DBObserver = DistributedDB::KvStoreObserver; 46 using DBChangeData = DistributedDB::KvStoreChangedData; 47 using DBEntry = DistributedDB::Entry; 48 using Observers = std::set<sptr<IKvStoreObserver>, Less<IKvStoreObserver>>; 49 using StoreMetaData = OHOS::DistributedData::StoreMetaData; 50 using Time = std::chrono::steady_clock::time_point; 51 using DBOption = DistributedDB::KvStoreNbDelegate::Option; 52 using DBSecurity = DistributedDB::SecurityOption; 53 using DBPassword = DistributedDB::CipherPassword; 54 55 struct DBStoreDelegate : public DBObserver { 56 DBStoreDelegate(DBStore *delegate, std::shared_ptr<Observers> observers); 57 ~DBStoreDelegate(); 58 operator std::shared_ptr<DBStore> (); 59 bool operator<(const Time &time) const; 60 bool Close(DBManager &manager); 61 void OnChange(const DBChangeData &data) override; 62 void SetObservers(std::shared_ptr<Observers> observers); 63 64 private: 65 std::vector<Entry> Convert(const std::list<DBEntry> &dbEntries); 66 mutable Time time_; 67 DBStore *delegate_ = nullptr; 68 std::shared_ptr<Observers> observers_ = nullptr; 69 std::shared_mutex mutex_; 70 }; 71 72 Store GetStore(const StoreMetaData &data, std::shared_ptr<Observers> observers, DBStatus &status); 73 void CloseStore(uint32_t tokenId, const std::string &storeId); 74 void CloseExcept(const std::set<int32_t> &users); 75 void SetObserver(uint32_t tokenId, const std::string &storeId, std::shared_ptr<Observers> observers); 76 static DBOption GetDBOption(const StoreMetaData &data, const DBPassword &password); 77 static DBSecurity GetDBSecurity(int32_t secLevel); 78 static DBPassword GetDBPassword(const StoreMetaData &data); 79 void SetThreadPool(std::shared_ptr<ExecutorPool> executors); 80 private: 81 void GarbageCollect(); 82 static constexpr int64_t INTERVAL = 1; 83 ConcurrentMap<uint32_t, std::map<std::string, DBStoreDelegate>> stores_; 84 std::shared_ptr<ExecutorPool> executors_; 85 }; 86 } // namespace OHOS::DistributedKv 87 #endif // OHOS_DISTRIBUTED_DATA_SERVICE_KVDB_STORE_CACHE_H 88