57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
#pragma once
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#include <atomic>
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#include <iostream>
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#include <memory>
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#include <string>
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#include <type_traits>
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#include <unordered_map>
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#include <variant>
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#include <vector>
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namespace vptyp {
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static constexpr std::string_view configErrorMsg =
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"Bruh, incorrect configuration";
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class Logger {
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// helper class for handling worker thread
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class Worker;
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using map_type =
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std::unordered_map<std::string, std::variant<int64_t, double>>;
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public:
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virtual ~Logger();
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explicit Logger(std::ostream& out);
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Logger() = delete;
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Logger(Logger&) = delete;
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Logger(Logger&&) = delete;
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/// @return success or not (already configured)
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bool configure(const std::vector<std::string>& d);
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template <typename Metric,
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typename = std::enable_if_t<std::is_arithmetic_v<Metric>>>
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void add(const std::string& field, Metric metric) {
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auto locked = active.load();
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// auto locked = active;
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auto it = locked->find(field);
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if (it == locked->end()) {
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throw configErrorMsg;
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}
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it->second = metric;
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}
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bool isConfigured() { return configured == CONFIGURED; }
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private:
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friend Worker;
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enum Configuration { NOT_CONFIGURED, CONFIG_IN_PROGRESS, CONFIGURED };
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std::atomic<int> configured{NOT_CONFIGURED};
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std::unique_ptr<Worker> worker;
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std::shared_ptr<map_type> m1, m2;
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std::atomic<std::shared_ptr<map_type>> active; // impl may use mutex!
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// std::shared_ptr<map_type> active;
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};
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} // namespace vptyp
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