fix idle_since metric for rabbitmq 3.10

spotted in #285

exporter_queue.go

@@ -3,7 +3,6 @@ package main
 import (
 	"context"
 	"errors"
-	"time"
 
 	"github.com/prometheus/client_golang/prometheus"
 	log "github.com/sirupsen/logrus"
@@ -202,7 +201,8 @@ func (e exporterQueue) Collect(ctx context.Context, ch chan<- prometheus.Metric)
 		state := queue.labels["state"]
 		idleSince, exists := queue.labels["idle_since"]
 		if exists && idleSince != "" {
-			if t, err := time.Parse("2006-01-02 15:04:05", idleSince); err == nil {
+
+			if t, err := parseTime(idleSince); err == nil {
 				unixSeconds := float64(t.UnixNano()) / 1e9
 
 				if state == "running" { //replace running state with idle if idle_since time is provided. Other states (flow, etc.) are not replaced

jsonmap.go

@@ -3,7 +3,9 @@ package main
 import (
 	"bytes"
 	"encoding/json"
+	"fmt"
 	"strconv"
+	"time"
 
 	log "github.com/sirupsen/logrus"
 )
@@ -129,3 +131,16 @@ func (rep *rabbitJSONReply) GetString(key string) (string, bool) {
 	value, ok := val.(string)
 	return value, ok
 }
+
+func parseTime(s string) (time.Time, error) {
+	t, err := time.Parse("2006-01-02 15:04:05", s)
+	if err == nil {
+		return t, nil
+	}
+	t, err = time.Parse("2006-01-02T15:04:05.999-07:00", s)
+	if err == nil {
+		return t, nil
+	}
+	return t, fmt.Errorf("time format does not match expectations")
+
+}