adapter.hpp

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#pragma once
 
 
#include <prom/adapter.hpp>
 
#include <memory>
#include <span>
#include <string_view>
 
namespace prometheus {
class Registry;
}
 
namespace prom::prometheus_cpp {
 
class PrometheusCppAdapter final : public prom::Adapter {
public:
    PrometheusCppAdapter();
 
    explicit PrometheusCppAdapter(std::shared_ptr<prometheus::Registry> registry);
 
    ~PrometheusCppAdapter() override;
 
    [[nodiscard]] prometheus::Registry& registry() const noexcept;
 
    [[nodiscard]] std::shared_ptr<prometheus::Registry> registry_ptr() const noexcept;
 
    [[nodiscard]] std::string_view backend_name() const noexcept override;
 
    [[nodiscard]] prom::MetricHandle
    register_metric(const prom::MetricMeta& meta) noexcept override;
    [[nodiscard]] prom::MetricHandle resolve(const prom::MetricHandle& family,
                                             const prom::Labels& dynamic) noexcept override;
 
    void inc(const prom::MetricHandle& handle, double amount) noexcept override;
    void dec(const prom::MetricHandle& handle, double amount) noexcept override;
    void set(const prom::MetricHandle& handle, double value) noexcept override;
    void observe(const prom::MetricHandle& handle, double value) noexcept override;
    void set_info(const prom::MetricHandle& handle,
                  std::span<const prom::Label> labels) noexcept override;
    void set_state(const prom::MetricHandle& handle,
                   std::string_view state,
                   bool active) noexcept override;
 
private:
    class Impl;
    std::unique_ptr<Impl> impl_;
};
 
}  // namespace prom::prometheus_cpp