mmetric

type AttributeMap map[string]interface{}

type Attributes map[string]string

type Counter interface {
	Add(ctx context.Context, value float64, opts ...Option) // Add adds a specified value
	Inc(ctx context.Context, opts ...Option)                // Inc increments the counter by 1
}

type Histogram interface {
	Record(value float64, opts ...Option) // Record records a value
}

type Meter interface {
	Counter(name string, option MetricOption) (Counter, error)             // Counter creates a counter
	MustCounter(name string, option MetricOption) Counter                  // MustCounter creates a counter, panics if creation fails
	UpDownCounter(name string, option MetricOption) (UpDownCounter, error) // UpDownCounter creates an up-down counter
	MustUpDownCounter(name string, option MetricOption) UpDownCounter      // MustUpDownCounter creates an up-down counter, panics if creation fails
	Histogram(name string, option MetricOption) (Histogram, error)         // Histogram creates a histogram
	MustHistogram(name string, option MetricOption) Histogram              // MustHistogram creates a histogram, panics if creation fails
}

type MeterOption struct {
	Instrument        string     // Instrument name
	InstrumentVersion string     // Instrument version
	Attributes        Attributes // Attributes
}

type MetricOption struct {
	Help       string     // Help information
	Unit       string     // Unit
	Attributes Attributes // Attributes
	Buckets    []float64  // Buckets (may not be supported by all implementations)
}

type Option struct {
	Attributes AttributeMap // Attributes map
}

type Provider interface {
	Meter(option MeterOption) Meter     // Meter creates a meter
	Shutdown(ctx context.Context) error // Shutdown shuts down the provider
}

type UpDownCounter interface {
	Add(ctx context.Context, value float64, opts ...Option) // Add adds a specified value (can be negative)
	Inc(ctx context.Context, opts ...Option)                // Inc increments the counter by 1
	Dec(ctx context.Context, opts ...Option)                // Dec decrements the counter by 1
}