vendor: Update everything

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4620

vendor/github.com/rcrowley/go-metrics/registry.go

@@ -29,6 +29,9 @@ type Registry interface {
 	// Get the metric by the given name or nil if none is registered.
 	Get(string) interface{}
 
+	// GetAll metrics in the Registry.
+	GetAll() map[string]map[string]interface{}
+
 	// Gets an existing metric or registers the given one.
 	// The interface can be the metric to register if not found in registry,
 	// or a function returning the metric for lazy instantiation.
@@ -109,10 +112,72 @@ func (r *StandardRegistry) RunHealthchecks() {
 	}
 }
 
+// GetAll metrics in the Registry
+func (r *StandardRegistry) GetAll() map[string]map[string]interface{} {
+	data := make(map[string]map[string]interface{})
+	r.Each(func(name string, i interface{}) {
+		values := make(map[string]interface{})
+		switch metric := i.(type) {
+		case Counter:
+			values["count"] = metric.Count()
+		case Gauge:
+			values["value"] = metric.Value()
+		case GaugeFloat64:
+			values["value"] = metric.Value()
+		case Healthcheck:
+			values["error"] = nil
+			metric.Check()
+			if err := metric.Error(); nil != err {
+				values["error"] = metric.Error().Error()
+			}
+		case Histogram:
+			h := metric.Snapshot()
+			ps := h.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999})
+			values["count"] = h.Count()
+			values["min"] = h.Min()
+			values["max"] = h.Max()
+			values["mean"] = h.Mean()
+			values["stddev"] = h.StdDev()
+			values["median"] = ps[0]
+			values["75%"] = ps[1]
+			values["95%"] = ps[2]
+			values["99%"] = ps[3]
+			values["99.9%"] = ps[4]
+		case Meter:
+			m := metric.Snapshot()
+			values["count"] = m.Count()
+			values["1m.rate"] = m.Rate1()
+			values["5m.rate"] = m.Rate5()
+			values["15m.rate"] = m.Rate15()
+			values["mean.rate"] = m.RateMean()
+		case Timer:
+			t := metric.Snapshot()
+			ps := t.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999})
+			values["count"] = t.Count()
+			values["min"] = t.Min()
+			values["max"] = t.Max()
+			values["mean"] = t.Mean()
+			values["stddev"] = t.StdDev()
+			values["median"] = ps[0]
+			values["75%"] = ps[1]
+			values["95%"] = ps[2]
+			values["99%"] = ps[3]
+			values["99.9%"] = ps[4]
+			values["1m.rate"] = t.Rate1()
+			values["5m.rate"] = t.Rate5()
+			values["15m.rate"] = t.Rate15()
+			values["mean.rate"] = t.RateMean()
+		}
+		data[name] = values
+	})
+	return data
+}
+
 // Unregister the metric with the given name.
 func (r *StandardRegistry) Unregister(name string) {
 	r.mutex.Lock()
 	defer r.mutex.Unlock()
+	r.stop(name)
 	delete(r.metrics, name)
 }
 
@@ -121,6 +186,7 @@ func (r *StandardRegistry) UnregisterAll() {
 	r.mutex.Lock()
 	defer r.mutex.Unlock()
 	for name, _ := range r.metrics {
+		r.stop(name)
 		delete(r.metrics, name)
 	}
 }
@@ -146,6 +212,19 @@ func (r *StandardRegistry) registered() map[string]interface{} {
 	return metrics
 }
 
+func (r *StandardRegistry) stop(name string) {
+	if i, ok := r.metrics[name]; ok {
+		if s, ok := i.(Stoppable); ok {
+			s.Stop()
+		}
+	}
+}
+
+// Stoppable defines the metrics which has to be stopped.
+type Stoppable interface {
+	Stop()
+}
+
 type PrefixedRegistry struct {
 	underlying Registry
 	prefix     string
@@ -216,6 +295,11 @@ func (r *PrefixedRegistry) RunHealthchecks() {
 	r.underlying.RunHealthchecks()
 }
 
+// GetAll metrics in the Registry
+func (r *PrefixedRegistry) GetAll() map[string]map[string]interface{} {
+	return r.underlying.GetAll()
+}
+
 // Unregister the metric with the given name. The name will be prefixed.
 func (r *PrefixedRegistry) Unregister(name string) {
 	realName := r.prefix + name