6 "github.com/go-kit/kit/metrics"
9 type instrumentingService struct {
10 requestCount metrics.Counter
11 requestLatency metrics.Histogram
15 // NewInstrumentingService returns an instance of an instrumenting Service.
16 func NewInstrumentingService(counter metrics.Counter, latency metrics.Histogram, s Service) Service {
17 return &instrumentingService{
18 requestCount: counter,
19 requestLatency: latency,
24 func (s *instrumentingService) Track(id string) (Cargo, error) {
25 defer func(begin time.Time) {
26 s.requestCount.With("method", "track").Add(1)
27 s.requestLatency.With("method", "track").Observe(time.Since(begin).Seconds())
30 return s.Service.Track(id)