1 /** 2 * Copyright © 2017 IBM Corporation 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "config.h" 18 19 #include "event_manager.hpp" 20 21 #include "event.hpp" 22 #include "event_serialize.hpp" 23 24 #include <filesystem> 25 26 namespace phosphor 27 { 28 namespace events 29 { 30 31 void Manager::create(const std::string& eventName, 32 const std::string& eventMessage, 33 const std::string& objectPath, 34 const std::string& propertyName, 35 const std::string& propertyValue) 36 { 37 using namespace std::string_literals; 38 namespace fs = std::filesystem; 39 40 auto msg = eventMessage; 41 std::vector<std::string> additionalData; 42 43 auto propVal = propertyName + "=" + propertyValue; 44 auto path = "path="s + objectPath; 45 46 additionalData.push_back(std::move(path)); 47 additionalData.push_back(std::move(propVal)); 48 49 auto& eventQueue = eventMap[eventName]; 50 51 // get the last event entry for this event 52 // to generate the id. 53 auto id = 0; 54 if (eventQueue.size() > 0) 55 { 56 fs::path path(eventQueue.back()->objectPath); 57 id = std::stoi(std::string(path.filename().c_str())); 58 id++; 59 } 60 61 auto ms = std::chrono::duration_cast<std::chrono::milliseconds>( 62 std::chrono::system_clock::now().time_since_epoch()) 63 .count(); 64 65 auto objPath = 66 std::string(OBJ_EVENT) + '/' + eventName + '/' + std::to_string(id); 67 68 // check for capping of the events,if cap reached then erase the oldest 69 // event. 70 if (eventQueue.size() == MAX_EVENTS) 71 { 72 fs::path eventPath(EVENTS_PERSIST_PATH); 73 eventPath /= eventName; 74 eventPath /= std::to_string(eventQueue.front()->timestamp()); 75 eventQueue.pop(); 76 std::error_code ec; 77 fs::remove(eventPath, ec); 78 } 79 80 auto event = 81 std::make_unique<Entry>(objPath, 82 ms, // Milliseconds since 1970 83 std::move(msg), std::move(additionalData)); 84 serialize(*event, eventName); 85 eventQueue.push(std::move(event)); 86 } 87 88 void Manager::restore() 89 { 90 if (!fs::exists(EVENTS_PERSIST_PATH) || fs::is_empty(EVENTS_PERSIST_PATH)) 91 { 92 return; 93 } 94 95 for (auto& eventFile : 96 fs::recursive_directory_iterator(EVENTS_PERSIST_PATH)) 97 { 98 if (!fs::is_regular_file(eventFile)) 99 { 100 continue; 101 } 102 103 EventQueue events; 104 105 auto eventPath = eventFile.path().string(); 106 auto pos1 = eventPath.rfind("/"); 107 auto pos2 = eventPath.rfind("/", pos1 - 1) + 1; 108 auto eventName = eventPath.substr(pos2, (pos1 - pos2)); 109 auto validEvent = false; 110 auto timestamp = eventFile.path().filename().string(); 111 auto tsNum = std::stoll(timestamp); 112 auto objPath = 113 std::string(OBJ_EVENT) + '/' + eventName + '/' + timestamp; 114 115 auto event = std::make_unique<Entry>(objPath, tsNum); 116 if (deserialize(eventFile.path(), *event)) 117 { 118 event->emit_object_added(); 119 events.push(std::move(event)); 120 validEvent = true; 121 } 122 123 if (validEvent) 124 { 125 eventMap[eventName] = std::move(events); 126 } 127 } 128 } 129 130 Manager& getManager() 131 { 132 static Manager mgr; 133 return mgr; 134 } 135 136 } // namespace events 137 } // namespace phosphor 138