Merge pull request #155 from hashicorp/biazmoreira/addgaugefloat64-sink

Add PrecisionGauge to Circonus

circonus/circonus.go

@@ -68,6 +68,18 @@ func (s *CirconusSink) SetGaugeWithLabels(key []string, val float32, labels []me
 	s.metrics.SetGauge(flatKey, int64(val))
 }
 
+// SetPrecisionGauge sets value for a gauge metric with float64 precision
+func (s *CirconusSink) SetPrecisionGauge(key []string, val float64) {
+	flatKey := s.flattenKey(key)
+	s.metrics.SetGauge(flatKey, val)
+}
+
+// SetPrecisionGaugeWithLabels sets value for a gauge metric with the given labels with float64 precision
+func (s *CirconusSink) SetPrecisionGaugeWithLabels(key []string, val float64, labels []metrics.Label) {
+	flatKey := s.flattenKeyLabels(key, labels)
+	s.metrics.SetGauge(flatKey, val)
+}
+
 // EmitKey is not implemented in circonus
 func (s *CirconusSink) EmitKey(key []string, val float32) {
 	// NOP

circonus/circonus_test.go

@@ -99,6 +99,34 @@ func TestSetGauge(t *testing.T) {
 	}
 }
 
+func TestSetPrecisionGauge(t *testing.T) {
+	q := make(chan string)
+
+	server := fakeBroker(q)
+	defer server.Close()
+
+	cfg := &Config{}
+	cfg.CheckManager.Check.SubmissionURL = server.URL
+
+	cs, err := NewCirconusSink(cfg)
+	if err != nil {
+		t.Errorf("Expected no error, got '%v'", err)
+	}
+
+	go func() {
+		cs.SetPrecisionGauge([]string{"foo", "bar"}, 1)
+		cs.Flush()
+	}()
+
+	expect := "{\"foo`bar\":{\"_type\":\"n\",\"_value\":1}}"
+	actual := <-q
+
+	if actual != expect {
+		t.Errorf("Expected '%s', got '%s'", expect, actual)
+
+	}
+}
+
 func TestIncrCounter(t *testing.T) {
 	q := make(chan string)