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 #ifndef OHOS_DISTRIBUTED_DATA_SERVICE_MATRIX_DEVICE_MATRIX_H 16 #define OHOS_DISTRIBUTED_DATA_SERVICE_MATRIX_DEVICE_MATRIX_H 17 #include <map> 18 #include <mutex> 19 #include "eventcenter/event.h" 20 #include "lru_bucket.h" 21 #include "metadata/matrix_meta_data.h" 22 #include "metadata/store_meta_data.h" 23 #include "utils/ref_count.h" 24 #include "visibility.h" 25 namespace OHOS::DistributedData { 26 class API_EXPORT DeviceMatrix { 27 public: 28 using TimePoint = std::chrono::steady_clock::time_point; 29 static constexpr uint16_t META_STORE_MASK = 0x0001; 30 enum : int32_t { 31 MATRIX_ONLINE = Event::EVT_CUSTOM, 32 MATRIX_META_FINISHED, 33 MATRIX_BROADCAST, 34 MATRIX_BUTT 35 }; 36 static DeviceMatrix &GetInstance(); 37 bool Initialize(uint32_t token, std::string storeId); 38 void Online(const std::string &device, RefCount refCount = {}); 39 void Offline(const std::string &device); 40 uint16_t OnBroadcast(const std::string &device, uint16_t code); 41 void OnChanged(uint16_t code); 42 void OnChanged(const StoreMetaData &metaData); 43 void OnExchanged(const std::string &device, uint16_t code, bool isRemote = false); 44 bool IsChangedInTerm(const StoreMetaData &metaData, uint64_t term); 45 uint16_t GetCode(const StoreMetaData &metaData); 46 void Clear(); 47 48 private: 49 static constexpr uint32_t CURRENT_VERSION = 1; 50 static constexpr uint32_t CURRENT_MASK = 0x0002; 51 static constexpr size_t MAX_DEVICES = 16; 52 53 DeviceMatrix(); 54 ~DeviceMatrix(); 55 DeviceMatrix(const DeviceMatrix &) = delete; 56 DeviceMatrix(DeviceMatrix &&) noexcept = delete; 57 DeviceMatrix &operator=(const DeviceMatrix &) = delete; 58 DeviceMatrix &operator=(DeviceMatrix &&) noexcept = delete; SetMask(size_t index)59 static inline uint16_t SetMask(size_t index) 60 { 61 return 0x1 << (index + 1); 62 } 63 64 uint16_t ConvertMask(const std::string &device, uint16_t code); 65 MatrixMetaData GetMatrixMeta(const std::string &device); 66 67 struct Mask { 68 uint16_t bitset = META_STORE_MASK | CURRENT_MASK; 69 }; 70 71 uint32_t tokenId_ = 0; 72 std::string storeId_; 73 std::mutex mutex_; 74 std::map<std::string, Mask> onLines_; 75 std::map<std::string, Mask> offLines_; 76 std::map<std::string, Mask> remotes_; 77 std::vector<std::string> maskApps_ = { "distributed_device_profile_service" }; 78 LRUBucket<std::string, MatrixMetaData> versions_{ MAX_DEVICES }; 79 LRUBucket<uint32_t, TimePoint> changeTime_ { 64 }; 80 }; 81 } // namespace OHOS::DistributedData 82 #endif // OHOS_DISTRIBUTED_DATA_SERVICE_MATRIX_DEVICE_MATRIX_H 83