trace

type Option func(o *Options)

type Options struct {
	// Size is the size of ring buffer
	Size int
}

type ReadOption func(o *ReadOptions)

type ReadOptions struct {
	// Trace id
	Trace string
}

type Span struct {
	// Start time
	Started time.Time
	// associated data
	Metadata map[string]string
	// Id of the trace
	Trace string
	// name of the span
	Name string
	// id of the span
	Id string
	// parent span id
	Parent string
	// Duration in nano seconds
	Duration time.Duration
	// Type
	Type SpanType
}

type SpanType int

type Tracer interface {
	// Start a trace
	Start(ctx context.Context, name string) (context.Context, *Span)
	// Finish the trace
	Finish(*Span) error
	// Read the traces
	Read(...ReadOption) ([]*Span, error)
}