Initial QSfera import

Server/services/ocs/pkg/service/v0/instrument.go

@@ -0,0 +1,25 @@
+package svc
+
+import (
+	"net/http"
+
+	"github.com/qsfera/server/services/ocs/pkg/metrics"
+)
+
+// NewInstrument returns a service that instruments metrics.
+func NewInstrument(next Service, metrics *metrics.Metrics) Service {
+	return instrument{
+		next:    next,
+		metrics: metrics,
+	}
+}
+
+type instrument struct {
+	next    Service
+	metrics *metrics.Metrics
+}
+
+// ServeHTTP implements the Service interface.
+func (i instrument) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	i.next.ServeHTTP(w, r)
+}