From 96eab1202717e073782ec399a4e0820cae15b1bb Mon Sep 17 00:00:00 2001
From: Christopher Speller <crspeller@gmail.com>
Date: Thu, 17 Aug 2017 17:19:06 -0700
Subject: Updating server dependancies. (#7246)

---
 .../armon/go-metrics/prometheus/prometheus.go      | 72 ++++++++++++++++------
 1 file changed, 52 insertions(+), 20 deletions(-)

(limited to 'vendor/github.com/armon/go-metrics/prometheus')

diff --git a/vendor/github.com/armon/go-metrics/prometheus/prometheus.go b/vendor/github.com/armon/go-metrics/prometheus/prometheus.go
index b26d27981..f31f2f9a5 100644
--- a/vendor/github.com/armon/go-metrics/prometheus/prometheus.go
+++ b/vendor/github.com/armon/go-metrics/prometheus/prometheus.go
@@ -2,10 +2,14 @@
 package prometheus
 
 import (
+	"fmt"
 	"strings"
 	"sync"
 	"time"
 
+	"regexp"
+
+	"github.com/armon/go-metrics"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -24,24 +28,42 @@ func NewPrometheusSink() (*PrometheusSink, error) {
 	}, nil
 }
 
-func (p *PrometheusSink) flattenKey(parts []string) string {
-	joined := strings.Join(parts, "_")
-	joined = strings.Replace(joined, " ", "_", -1)
-	joined = strings.Replace(joined, ".", "_", -1)
-	joined = strings.Replace(joined, "-", "_", -1)
-	joined = strings.Replace(joined, "=", "_", -1)
-	return joined
+var forbiddenChars = regexp.MustCompile("[ .=\\-]")
+
+func (p *PrometheusSink) flattenKey(parts []string, labels []metrics.Label) (string, string) {
+	key := strings.Join(parts, "_")
+	key = forbiddenChars.ReplaceAllString(key, "_")
+
+	hash := key
+	for _, label := range labels {
+		hash += fmt.Sprintf(";%s=%s", label.Name, label.Value)
+	}
+
+	return key, hash
+}
+
+func prometheusLabels(labels []metrics.Label) prometheus.Labels {
+	l := make(prometheus.Labels)
+	for _, label := range labels {
+		l[label.Name] = label.Value
+	}
+	return l
 }
 
 func (p *PrometheusSink) SetGauge(parts []string, val float32) {
+	p.SetGaugeWithLabels(parts, val, nil)
+}
+
+func (p *PrometheusSink) SetGaugeWithLabels(parts []string, val float32, labels []metrics.Label) {
 	p.mu.Lock()
 	defer p.mu.Unlock()
-	key := p.flattenKey(parts)
-	g, ok := p.gauges[key]
+	key, hash := p.flattenKey(parts, labels)
+	g, ok := p.gauges[hash]
 	if !ok {
 		g = prometheus.NewGauge(prometheus.GaugeOpts{
-			Name: key,
-			Help: key,
+			Name:        key,
+			Help:        key,
+			ConstLabels: prometheusLabels(labels),
 		})
 		prometheus.MustRegister(g)
 		p.gauges[key] = g
@@ -50,15 +72,20 @@ func (p *PrometheusSink) SetGauge(parts []string, val float32) {
 }
 
 func (p *PrometheusSink) AddSample(parts []string, val float32) {
+	p.AddSampleWithLabels(parts, val, nil)
+}
+
+func (p *PrometheusSink) AddSampleWithLabels(parts []string, val float32, labels []metrics.Label) {
 	p.mu.Lock()
 	defer p.mu.Unlock()
-	key := p.flattenKey(parts)
-	g, ok := p.summaries[key]
+	key, hash := p.flattenKey(parts, labels)
+	g, ok := p.summaries[hash]
 	if !ok {
 		g = prometheus.NewSummary(prometheus.SummaryOpts{
-			Name:   key,
-			Help:   key,
-			MaxAge: 10 * time.Second,
+			Name:        key,
+			Help:        key,
+			MaxAge:      10 * time.Second,
+			ConstLabels: prometheusLabels(labels),
 		})
 		prometheus.MustRegister(g)
 		p.summaries[key] = g
@@ -73,14 +100,19 @@ func (p *PrometheusSink) EmitKey(key []string, val float32) {
 }
 
 func (p *PrometheusSink) IncrCounter(parts []string, val float32) {
+	p.IncrCounterWithLabels(parts, val, nil)
+}
+
+func (p *PrometheusSink) IncrCounterWithLabels(parts []string, val float32, labels []metrics.Label) {
 	p.mu.Lock()
 	defer p.mu.Unlock()
-	key := p.flattenKey(parts)
-	g, ok := p.counters[key]
+	key, hash := p.flattenKey(parts, labels)
+	g, ok := p.counters[hash]
 	if !ok {
 		g = prometheus.NewCounter(prometheus.CounterOpts{
-			Name: key,
-			Help: key,
+			Name:        key,
+			Help:        key,
+			ConstLabels: prometheusLabels(labels),
 		})
 		prometheus.MustRegister(g)
 		p.counters[key] = g
-- 
cgit v1.2.3-1-g7c22