6 "github.com/go-kit/kit/metrics"
8 "github.com/go-kit/kit/examples/shipping/cargo"
9 "github.com/go-kit/kit/examples/shipping/location"
10 "github.com/go-kit/kit/examples/shipping/voyage"
13 type instrumentingService struct {
14 requestCount metrics.Counter
15 requestLatency metrics.Histogram
19 // NewInstrumentingService returns an instance of an instrumenting Service.
20 func NewInstrumentingService(counter metrics.Counter, latency metrics.Histogram, s Service) Service {
21 return &instrumentingService{
22 requestCount: counter,
23 requestLatency: latency,
28 func (s *instrumentingService) RegisterHandlingEvent(completed time.Time, id cargo.TrackingID, voyageNumber voyage.Number,
29 loc location.UNLocode, eventType cargo.HandlingEventType) error {
31 defer func(begin time.Time) {
32 s.requestCount.With("method", "register_incident").Add(1)
33 s.requestLatency.With("method", "register_incident").Observe(time.Since(begin).Seconds())
36 return s.Service.RegisterHandlingEvent(completed, id, voyageNumber, loc, eventType)