Moved to google.golang.org/genproto/googleapis/api/annotations

Fixes #52

vendor/github.com/go-kit/kit/examples/stringsvc3/instrumenting.go

@@ -0,0 +1,48 @@
+package main
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/go-kit/kit/metrics"
+)
+
+func instrumentingMiddleware(
+	requestCount metrics.Counter,
+	requestLatency metrics.Histogram,
+	countResult metrics.Histogram,
+) ServiceMiddleware {
+	return func(next StringService) StringService {
+		return instrmw{requestCount, requestLatency, countResult, next}
+	}
+}
+
+type instrmw struct {
+	requestCount   metrics.Counter
+	requestLatency metrics.Histogram
+	countResult    metrics.Histogram
+	StringService
+}
+
+func (mw instrmw) Uppercase(s string) (output string, err error) {
+	defer func(begin time.Time) {
+		lvs := []string{"method", "uppercase", "error", fmt.Sprint(err != nil)}
+		mw.requestCount.With(lvs...).Add(1)
+		mw.requestLatency.With(lvs...).Observe(time.Since(begin).Seconds())
+	}(time.Now())
+
+	output, err = mw.StringService.Uppercase(s)
+	return
+}
+
+func (mw instrmw) Count(s string) (n int) {
+	defer func(begin time.Time) {
+		lvs := []string{"method", "count", "error", "false"}
+		mw.requestCount.With(lvs...).Add(1)
+		mw.requestLatency.With(lvs...).Observe(time.Since(begin).Seconds())
+		mw.countResult.Observe(float64(n))
+	}(time.Now())
+
+	n = mw.StringService.Count(s)
+	return
+}