1 /** 2 * Copyright © 2018 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 #include <experimental/filesystem> 17 #include <fstream> 18 #include <nlohmann/json.hpp> 19 #include <phosphor-logging/log.hpp> 20 #include "policy_table.hpp" 21 22 namespace ibm 23 { 24 namespace logging 25 { 26 namespace policy 27 { 28 29 namespace fs = std::experimental::filesystem; 30 using namespace phosphor::logging; 31 32 Table::Table(const std::string& jsonFile) 33 { 34 if (fs::exists(jsonFile)) 35 { 36 load(jsonFile); 37 } 38 else 39 { 40 log<level::INFO>("Policy table JSON file does not exist", 41 entry("FILE=%s", jsonFile.c_str())); 42 } 43 } 44 45 void Table::load(const std::string& jsonFile) 46 { 47 try 48 { 49 std::ifstream file{jsonFile}; 50 51 auto json = nlohmann::json::parse(file, nullptr, true); 52 53 for (const auto& policy : json) 54 { 55 DetailsList detailsList; 56 57 for (const auto& details : policy["dtls"]) 58 { 59 Details d; 60 d.modifier = details["mod"]; 61 d.msg = details["msg"]; 62 d.ceid = details["CEID"]; 63 detailsList.emplace_back(std::move(d)); 64 } 65 policies.emplace(policy["err"], std::move(detailsList)); 66 } 67 68 loaded = true; 69 } 70 catch (std::exception& e) 71 { 72 log<level::ERR>("Failed loading policy table json file", 73 entry("FILE=%s", jsonFile.c_str()), 74 entry("ERROR=%s", e.what())); 75 loaded = false; 76 } 77 } 78 79 optional_ns::optional<DetailsReference> 80 Table::find(const std::string& error, const std::string& modifier) const 81 { 82 // First find the entry based on the error, and then find which 83 // underlying details object it is with the help of the modifier. 84 85 auto policy = policies.find(error); 86 87 if (policy != policies.end()) 88 { 89 // If there is no exact modifier match, then look for an entry with 90 // an empty modifier - it is the catch-all for that error. 91 auto details = std::find_if( 92 policy->second.begin(), policy->second.end(), 93 [&modifier](const auto& d) { return modifier == d.modifier; }); 94 95 if ((details == policy->second.end()) && !modifier.empty()) 96 { 97 details = 98 std::find_if(policy->second.begin(), policy->second.end(), 99 [](const auto& d) { return d.modifier.empty(); }); 100 } 101 102 if (details != policy->second.end()) 103 { 104 return DetailsReference(*details); 105 } 106 } 107 108 return {}; 109 } 110 } 111 } 112 } 113