/
instrumenting.go
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/
instrumenting.go
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package booking
import (
"time"
"github.com/go-kit/kit/metrics"
"github.com/go-kit/kit/examples/shipping/cargo"
"github.com/go-kit/kit/examples/shipping/location"
)
type instrumentingService struct {
requestCount metrics.Counter
requestLatency metrics.Histogram
Service
}
// NewInstrumentingService returns an instance of an instrumenting Service.
func NewInstrumentingService(counter metrics.Counter, latency metrics.Histogram, s Service) Service {
return &instrumentingService{
requestCount: counter,
requestLatency: latency,
Service: s,
}
}
func (s *instrumentingService) BookNewCargo(origin, destination location.UNLocode, deadline time.Time) (cargo.TrackingID, error) {
defer func(begin time.Time) {
s.requestCount.With("method", "book").Add(1)
s.requestLatency.With("method", "book").Observe(time.Since(begin).Seconds())
}(time.Now())
return s.Service.BookNewCargo(origin, destination, deadline)
}
func (s *instrumentingService) LoadCargo(id cargo.TrackingID) (c Cargo, err error) {
defer func(begin time.Time) {
s.requestCount.With("method", "load").Add(1)
s.requestLatency.With("method", "load").Observe(time.Since(begin).Seconds())
}(time.Now())
return s.Service.LoadCargo(id)
}
func (s *instrumentingService) RequestPossibleRoutesForCargo(id cargo.TrackingID) []cargo.Itinerary {
defer func(begin time.Time) {
s.requestCount.With("method", "request_routes").Add(1)
s.requestLatency.With("method", "request_routes").Observe(time.Since(begin).Seconds())
}(time.Now())
return s.Service.RequestPossibleRoutesForCargo(id)
}
func (s *instrumentingService) AssignCargoToRoute(id cargo.TrackingID, itinerary cargo.Itinerary) (err error) {
defer func(begin time.Time) {
s.requestCount.With("method", "assign_to_route").Add(1)
s.requestLatency.With("method", "assign_to_route").Observe(time.Since(begin).Seconds())
}(time.Now())
return s.Service.AssignCargoToRoute(id, itinerary)
}
func (s *instrumentingService) ChangeDestination(id cargo.TrackingID, l location.UNLocode) (err error) {
defer func(begin time.Time) {
s.requestCount.With("method", "change_destination").Add(1)
s.requestLatency.With("method", "change_destination").Observe(time.Since(begin).Seconds())
}(time.Now())
return s.Service.ChangeDestination(id, l)
}
func (s *instrumentingService) Cargos() []Cargo {
defer func(begin time.Time) {
s.requestCount.With("method", "list_cargos").Add(1)
s.requestLatency.With("method", "list_cargos").Observe(time.Since(begin).Seconds())
}(time.Now())
return s.Service.Cargos()
}
func (s *instrumentingService) Locations() []Location {
defer func(begin time.Time) {
s.requestCount.With("method", "list_locations").Add(1)
s.requestLatency.With("method", "list_locations").Observe(time.Since(begin).Seconds())
}(time.Now())
return s.Service.Locations()
}