Krzysztof Grobelny | f7ea299 | 2022-01-27 11:04:58 +0100 | [diff] [blame] | 1 | #include "metrics/collection_data.hpp" |
| 2 | |
| 3 | #include "metrics/collection_function.hpp" |
| 4 | |
| 5 | namespace metrics |
| 6 | { |
| 7 | |
| 8 | bool CollectionData::updateLastValue(double value) |
| 9 | { |
| 10 | const bool changed = lastValue != value; |
| 11 | lastValue = value; |
| 12 | return changed; |
| 13 | } |
| 14 | |
| 15 | class DataPoint : public CollectionData |
| 16 | { |
| 17 | public: |
| 18 | std::optional<double> update(Milliseconds) override |
| 19 | { |
| 20 | return lastReading; |
| 21 | } |
| 22 | |
| 23 | double update(Milliseconds, double reading) override |
| 24 | { |
| 25 | lastReading = reading; |
| 26 | return reading; |
| 27 | } |
| 28 | |
| 29 | private: |
| 30 | std::optional<double> lastReading; |
| 31 | }; |
| 32 | |
| 33 | class DataInterval : public CollectionData |
| 34 | { |
| 35 | public: |
| 36 | DataInterval(std::shared_ptr<CollectionFunction> function, |
| 37 | CollectionDuration duration) : |
| 38 | function(std::move(function)), |
| 39 | duration(duration) |
| 40 | { |
| 41 | if (duration.t.count() == 0) |
| 42 | { |
| 43 | throw sdbusplus::exception::SdBusError( |
| 44 | static_cast<int>(std::errc::invalid_argument), |
| 45 | "Invalid CollectionDuration"); |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | std::optional<double> update(Milliseconds timestamp) override |
| 50 | { |
| 51 | if (readings.empty()) |
| 52 | { |
| 53 | return std::nullopt; |
| 54 | } |
| 55 | |
| 56 | cleanup(timestamp); |
| 57 | |
| 58 | return function->calculate(readings, timestamp); |
| 59 | } |
| 60 | |
| 61 | double update(Milliseconds timestamp, double reading) override |
| 62 | { |
| 63 | readings.emplace_back(timestamp, reading); |
| 64 | |
| 65 | cleanup(timestamp); |
| 66 | |
| 67 | return function->calculate(readings, timestamp); |
| 68 | } |
| 69 | |
| 70 | private: |
| 71 | void cleanup(Milliseconds timestamp) |
| 72 | { |
| 73 | auto it = readings.begin(); |
| 74 | for (auto kt = std::next(readings.rbegin()); kt != readings.rend(); |
| 75 | ++kt) |
| 76 | { |
| 77 | const auto& [nextItemTimestamp, nextItemReading] = *std::prev(kt); |
| 78 | if (timestamp >= nextItemTimestamp && |
| 79 | timestamp - nextItemTimestamp > duration.t) |
| 80 | { |
| 81 | it = kt.base(); |
| 82 | break; |
| 83 | } |
| 84 | } |
| 85 | readings.erase(readings.begin(), it); |
| 86 | |
| 87 | if (timestamp > duration.t) |
| 88 | { |
| 89 | readings.front().first = |
| 90 | std::max(readings.front().first, timestamp - duration.t); |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | std::shared_ptr<CollectionFunction> function; |
| 95 | std::vector<ReadingItem> readings; |
| 96 | CollectionDuration duration; |
| 97 | }; |
| 98 | |
| 99 | class DataStartup : public CollectionData |
| 100 | { |
| 101 | public: |
| 102 | explicit DataStartup(std::shared_ptr<CollectionFunction> function) : |
| 103 | function(std::move(function)) |
| 104 | {} |
| 105 | |
| 106 | std::optional<double> update(Milliseconds timestamp) override |
| 107 | { |
| 108 | if (readings.empty()) |
| 109 | { |
| 110 | return std::nullopt; |
| 111 | } |
| 112 | |
| 113 | return function->calculateForStartupInterval(readings, timestamp); |
| 114 | } |
| 115 | |
| 116 | double update(Milliseconds timestamp, double reading) override |
| 117 | { |
| 118 | readings.emplace_back(timestamp, reading); |
| 119 | return function->calculateForStartupInterval(readings, timestamp); |
| 120 | } |
| 121 | |
| 122 | private: |
| 123 | std::shared_ptr<CollectionFunction> function; |
| 124 | std::vector<ReadingItem> readings; |
| 125 | }; |
| 126 | |
| 127 | std::vector<std::unique_ptr<CollectionData>> |
| 128 | makeCollectionData(size_t size, OperationType op, |
| 129 | CollectionTimeScope timeScope, |
| 130 | CollectionDuration duration) |
| 131 | { |
| 132 | using namespace std::string_literals; |
| 133 | |
| 134 | std::vector<std::unique_ptr<CollectionData>> result; |
| 135 | |
| 136 | result.reserve(size); |
| 137 | |
| 138 | switch (timeScope) |
| 139 | { |
| 140 | case CollectionTimeScope::interval: |
| 141 | std::generate_n(std::back_inserter(result), size, |
| 142 | [cf = makeCollectionFunction(op), duration] { |
| 143 | return std::make_unique<DataInterval>(cf, |
| 144 | duration); |
| 145 | }); |
| 146 | break; |
| 147 | case CollectionTimeScope::point: |
| 148 | std::generate_n(std::back_inserter(result), size, |
| 149 | [] { return std::make_unique<DataPoint>(); }); |
| 150 | break; |
| 151 | case CollectionTimeScope::startup: |
| 152 | std::generate_n(std::back_inserter(result), size, |
| 153 | [cf = makeCollectionFunction(op)] { |
| 154 | return std::make_unique<DataStartup>(cf); |
| 155 | }); |
| 156 | break; |
| 157 | } |
| 158 | |
| 159 | return result; |
| 160 | } |
| 161 | |
| 162 | } // namespace metrics |