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 16 #ifndef COMMUNICATOR_H 17 #define COMMUNICATOR_H 18 19 #include <chrono> 20 #include <condition_variable> 21 #include <cstdint> 22 #include <functional> 23 #include <mutex> 24 #include <set> 25 #include <string> 26 #include "communicator_aggregator.h" 27 #include "icommunicator.h" 28 #include "serial_buffer.h" 29 30 namespace DistributedDB { 31 class Communicator : public ICommunicator { 32 public: 33 Communicator(CommunicatorAggregator *inCommAggregator, const LabelType &inLabel); 34 ~Communicator() override; 35 36 DISABLE_COPY_ASSIGN_MOVE(Communicator); 37 38 int RegOnMessageCallback(const OnMessageCallback &onMessage, const Finalizer &inOper) override; 39 int RegOnConnectCallback(const OnConnectCallback &onConnect, const Finalizer &inOper) override; 40 int RegOnSendableCallback(const std::function<void(void)> &onSendable, const Finalizer &inOper) override; 41 42 void Activate(const std::string &userId = "") override; 43 44 uint32_t GetCommunicatorMtuSize() const override; 45 uint32_t GetCommunicatorMtuSize(const std::string &target) const override; 46 47 uint32_t GetTimeout() const override; 48 uint32_t GetTimeout(const std::string &target) const override; 49 bool IsDeviceOnline(const std::string &device) const override; 50 int GetLocalIdentity(std::string &outTarget) const override; 51 // Get the protocol version of remote target. Return -E_NOT_FOUND if no record. 52 int GetRemoteCommunicatorVersion(const std::string &target, uint16_t &outVersion) const override; 53 54 int SendMessage(const std::string &dstTarget, const Message *inMsg, const SendConfig &config) override; 55 int SendMessage(const std::string &dstTarget, const Message *inMsg, const SendConfig &config, 56 const OnSendEnd &onEnd) override; 57 58 // Call by CommunicatorAggregator directly 59 int OnBufferReceive(const std::string &srcTarget, const SerialBuffer *inBuf, const std::string &sendUser, 60 uint16_t remoteDbVersion); 61 62 // Call by CommunicatorAggregator directly 63 void OnConnectChange(const std::string &target, bool isConnect); 64 65 // Call by CommunicatorAggregator directly 66 void OnSendAvailable(); 67 68 // Call by CommunicatorAggregator directly 69 LabelType GetCommunicatorLabel() const; 70 71 std::string GetTargetUserId(const ExtendInfo ¶mInfo) const override; 72 73 bool ExchangeClosePending(bool expected) override; 74 private: 75 void TriggerVersionNegotiation(const std::string &dstTarget); 76 void TriggerUnknownMessageFeedback(const std::string &dstTarget, Message* &oriMsg); 77 78 DECLARE_OBJECT_TAG(Communicator); 79 80 CommunicatorAggregator *commAggrHandle_ = nullptr; 81 LabelType commLabel_; 82 83 std::set<std::string> onlineTargets_; // Actually protected by connectHandleMutex_ 84 85 OnMessageCallback onMessageHandle_; 86 OnConnectCallback onConnectHandle_; 87 std::function<void(void)> onSendableHandle_; 88 std::atomic<bool> dbClosePending_; 89 Finalizer onMessageFinalizer_; 90 Finalizer onConnectFinalizer_; 91 Finalizer onSendableFinalizer_; 92 std::mutex messageHandleMutex_; 93 std::mutex connectHandleMutex_; 94 std::mutex sendableHandleMutex_; 95 }; 96 } // namespace DistributedDB 97 98 #endif // COMMUNICATOR_H 99