Check in the vendor directory

Travis seems to be having issues pulling deps, so we'll have to check in
the vendor directory and prevent the makefile from trying to regenerate
it normally.

vendor/k8s.io/client-go/tools/cache/reflector_metrics.go

@@ -0,0 +1,119 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// This file provides abstractions for setting the provider (e.g., prometheus)
+// of metrics.
+
+package cache
+
+import (
+	"sync"
+)
+
+// GaugeMetric represents a single numerical value that can arbitrarily go up
+// and down.
+type GaugeMetric interface {
+	Set(float64)
+}
+
+// CounterMetric represents a single numerical value that only ever
+// goes up.
+type CounterMetric interface {
+	Inc()
+}
+
+// SummaryMetric captures individual observations.
+type SummaryMetric interface {
+	Observe(float64)
+}
+
+type noopMetric struct{}
+
+func (noopMetric) Inc()            {}
+func (noopMetric) Dec()            {}
+func (noopMetric) Observe(float64) {}
+func (noopMetric) Set(float64)     {}
+
+type reflectorMetrics struct {
+	numberOfLists       CounterMetric
+	listDuration        SummaryMetric
+	numberOfItemsInList SummaryMetric
+
+	numberOfWatches      CounterMetric
+	numberOfShortWatches CounterMetric
+	watchDuration        SummaryMetric
+	numberOfItemsInWatch SummaryMetric
+
+	lastResourceVersion GaugeMetric
+}
+
+// MetricsProvider generates various metrics used by the reflector.
+type MetricsProvider interface {
+	NewListsMetric(name string) CounterMetric
+	NewListDurationMetric(name string) SummaryMetric
+	NewItemsInListMetric(name string) SummaryMetric
+
+	NewWatchesMetric(name string) CounterMetric
+	NewShortWatchesMetric(name string) CounterMetric
+	NewWatchDurationMetric(name string) SummaryMetric
+	NewItemsInWatchMetric(name string) SummaryMetric
+
+	NewLastResourceVersionMetric(name string) GaugeMetric
+}
+
+type noopMetricsProvider struct{}
+
+func (noopMetricsProvider) NewListsMetric(name string) CounterMetric         { return noopMetric{} }
+func (noopMetricsProvider) NewListDurationMetric(name string) SummaryMetric  { return noopMetric{} }
+func (noopMetricsProvider) NewItemsInListMetric(name string) SummaryMetric   { return noopMetric{} }
+func (noopMetricsProvider) NewWatchesMetric(name string) CounterMetric       { return noopMetric{} }
+func (noopMetricsProvider) NewShortWatchesMetric(name string) CounterMetric  { return noopMetric{} }
+func (noopMetricsProvider) NewWatchDurationMetric(name string) SummaryMetric { return noopMetric{} }
+func (noopMetricsProvider) NewItemsInWatchMetric(name string) SummaryMetric  { return noopMetric{} }
+func (noopMetricsProvider) NewLastResourceVersionMetric(name string) GaugeMetric {
+	return noopMetric{}
+}
+
+var metricsFactory = struct {
+	metricsProvider MetricsProvider
+	setProviders    sync.Once
+}{
+	metricsProvider: noopMetricsProvider{},
+}
+
+func newReflectorMetrics(name string) *reflectorMetrics {
+	var ret *reflectorMetrics
+	if len(name) == 0 {
+		return ret
+	}
+	return &reflectorMetrics{
+		numberOfLists:        metricsFactory.metricsProvider.NewListsMetric(name),
+		listDuration:         metricsFactory.metricsProvider.NewListDurationMetric(name),
+		numberOfItemsInList:  metricsFactory.metricsProvider.NewItemsInListMetric(name),
+		numberOfWatches:      metricsFactory.metricsProvider.NewWatchesMetric(name),
+		numberOfShortWatches: metricsFactory.metricsProvider.NewShortWatchesMetric(name),
+		watchDuration:        metricsFactory.metricsProvider.NewWatchDurationMetric(name),
+		numberOfItemsInWatch: metricsFactory.metricsProvider.NewItemsInWatchMetric(name),
+		lastResourceVersion:  metricsFactory.metricsProvider.NewLastResourceVersionMetric(name),
+	}
+}
+
+// SetReflectorMetricsProvider sets the metrics provider
+func SetReflectorMetricsProvider(metricsProvider MetricsProvider) {
+	metricsFactory.setProviders.Do(func() {
+		metricsFactory.metricsProvider = metricsProvider
+	})
+}