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_FRAMEWORKS_KVDB_DEV_MANAGER_H 16 #define OHOS_DISTRIBUTED_DATA_FRAMEWORKS_KVDB_DEV_MANAGER_H 17 #include <string> 18 #include "concurrent_map.h" 19 #include "types.h" 20 #include "lru_bucket.h" 21 namespace OHOS::DistributedKv { 22 class DevManager { 23 public: 24 static constexpr size_t MAX_ID_LEN = 64; 25 struct DetailInfo { 26 std::string uuid; 27 std::string networkId; 28 std::string deviceName; 29 std::string deviceType; 30 }; 31 static DevManager &GetInstance(); 32 std::string ToUUID(const std::string &networkId); 33 std::string ToNetworkId(const std::string &uuid); 34 const DetailInfo &GetLocalDevice(); 35 std::vector<DetailInfo> GetRemoteDevices(); 36 class Observer { 37 public: 38 Observer() = default; ~Observer()39 virtual ~Observer() {} 40 virtual void Online(const std::string &networkId) = 0; 41 virtual void Offline(const std::string &networkId) = 0; 42 }; 43 44 void Register(Observer *observer); 45 void Unregister(Observer *observer); 46 47 private: 48 friend class DMStateCallback; 49 friend class DmDeathCallback; 50 DevManager(const std::string &pkgName); 51 ~DevManager() = default; 52 void Online(const std::string &networkId); 53 void Offline(const std::string &networkId); 54 void OnChanged(const std::string &networkId); 55 void OnReady(const std::string &networkId); 56 void RegisterDevCallback(); 57 void UpdateBucket(); 58 DetailInfo GetDvInfoFromBucket(const std::string &id); 59 60 int32_t Init(); 61 std::function<void()> Retry(); 62 const std::string PKG_NAME; 63 const DetailInfo invalidDetail_ {}; 64 DetailInfo localInfo_ {}; 65 mutable std::mutex mutex_ {}; 66 mutable LRUBucket<std::string, DetailInfo> deviceInfos_ {64}; 67 ConcurrentMap<Observer *, Observer *> observers_; 68 }; 69 } // namespace OHOS::DistributedKv 70 #endif // OHOS_DISTRIBUTED_DATA_FRAMEWORKS_KVDB_DEV_MANAGER_H 71