merics: add Init func to interface

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

metrics/noop.go

@@ -16,6 +16,14 @@ func NewReporter(opts ...Option) Reporter {
 	}
 }
 
+// Init initialize options
+func (r *noopReporter) Init(opts ...Option) error {
+	for _, o := range opts {
+		o(&r.opts)
+	}
+	return nil
+}
+
 // Count implements the Reporter interface Count method:
 func (r *noopReporter) Count(metricName string, value int64, tags Tags) error {
 	return nil

metrics/reporter.go

@@ -12,6 +12,7 @@ var (
 
 // Reporter is an interface for collecting and instrumenting metrics
 type Reporter interface {
+	Init(...Option) error
 	Count(id string, value int64, tags Tags) error
 	Gauge(id string, value float64, tags Tags) error
 	Timing(id string, value time.Duration, tags Tags) error