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 // Not all policy entries have a modifier defined, so if it is 90 // empty that will return as a match. 91 92 auto details = std::find_if( 93 policy->second.begin(), policy->second.end(), 94 [&modifier](const auto& d) { 95 return d.modifier.empty() || (modifier == d.modifier); 96 }); 97 98 if (details != policy->second.end()) 99 { 100 return DetailsReference(*details); 101 } 102 } 103 104 return {}; 105 } 106 } 107 } 108 } 109