rename metrics to meter

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

meter/noop.go

@@ -0,0 +1,47 @@
+package metrics
+
+import (
+	"time"
+
+	"github.com/unistack-org/micro/v3/metadata"
+)
+
+// NoopReporter is an noop implementation of Reporter:
+type noopReporter struct {
+	opts Options
+}
+
+// NewReporter returns a configured noop reporter:
+func NewReporter(opts ...Option) Reporter {
+	return &noopReporter{
+		opts: NewOptions(opts...),
+	}
+}
+
+// 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, md metadata.Metadata) error {
+	return nil
+}
+
+// Gauge implements the Reporter interface Gauge method:
+func (r *noopReporter) Gauge(metricName string, value float64, md metadata.Metadata) error {
+	return nil
+}
+
+// Timing implements the Reporter interface Timing method:
+func (r *noopReporter) Timing(metricName string, value time.Duration, md metadata.Metadata) error {
+	return nil
+}
+
+// Options implements the Reporter interface Optios method:
+func (r *noopReporter) Options() Options {
+	return r.opts
+}