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 #ifndef LOG_QUERIER_H 16 #define LOG_QUERIER_H 17 18 #include <array> 19 #include <atomic> 20 #include <condition_variable> 21 #include <future> 22 #include <memory> 23 #include <mutex> 24 25 #include <hilog_common.h> 26 #include <socket.h> 27 28 #include "log_buffer.h" 29 30 namespace OHOS { 31 namespace HiviewDFX { 32 class ServiceController { 33 public: 34 static constexpr int MAX_DATA_LEN = 2048; 35 using PacketBuf = std::array<char, MAX_DATA_LEN>; 36 37 ServiceController(std::unique_ptr<Socket> communicationSocket, HilogBuffer& buffer); 38 ~ServiceController(); 39 40 void CommunicationLoop(const std::atomic<bool>& stopLoop); 41 private: 42 void SetFilters(const PacketBuf& rawData); 43 44 void HandleLogQueryRequest(); 45 void HandleNextRequest(const PacketBuf& rawData, const std::atomic<bool>& stopLoop); 46 47 // persist storage 48 void HandlePersistStartRequest(const PacketBuf& rawData); 49 void HandlePersistStopRequest(const PacketBuf& rawData); 50 void HandlePersistQueryRequest(const PacketBuf& rawData); 51 52 // buffer size 53 void HandleBufferResizeRequest(const PacketBuf& rawData); 54 void HandleBufferSizeRequest(const PacketBuf& rawData); 55 56 // statistics 57 void HandleInfoQueryRequest(const PacketBuf& rawData); 58 void HandleInfoClearRequest(const PacketBuf& rawData); 59 void HandleBufferClearRequest(const PacketBuf& rawData); 60 61 int WriteData(LogQueryResponse& rsp, OptCRef<HilogData> pData); 62 int WriteV(const iovec* vec, size_t len); 63 int WriteLogQueryRespond(unsigned int sendId, uint32_t respondCmd, OptCRef<HilogData> pData); 64 void NotifyForNewData(); 65 66 std::unique_ptr<Socket> m_communicationSocket; 67 HilogBuffer& m_hilogBuffer; 68 HilogBuffer::ReaderId m_bufReader; 69 70 std::condition_variable m_notifyNewDataCv; 71 std::mutex m_notifyNewDataMtx; 72 73 LogFilterExt m_filters; 74 }; 75 76 int RestorePersistJobs(HilogBuffer& _buffer); 77 } // namespace HiviewDFX 78 } // namespace OHOS 79 #endif 80