Import of https://github.com/ciena/voltctl at commit 40d61fbf3f910ed4017cf67c9c79e8e1f82a33a5
Change-Id: I8464c59e60d76cb8612891db3303878975b5416c
diff --git a/vendor/k8s.io/client-go/tools/metrics/metrics.go b/vendor/k8s.io/client-go/tools/metrics/metrics.go
new file mode 100644
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+++ b/vendor/k8s.io/client-go/tools/metrics/metrics.go
@@ -0,0 +1,61 @@
+/*
+Copyright 2015 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.
+*/
+
+// Package metrics provides abstractions for registering which metrics
+// to record.
+package metrics
+
+import (
+ "net/url"
+ "sync"
+ "time"
+)
+
+var registerMetrics sync.Once
+
+// LatencyMetric observes client latency partitioned by verb and url.
+type LatencyMetric interface {
+ Observe(verb string, u url.URL, latency time.Duration)
+}
+
+// ResultMetric counts response codes partitioned by method and host.
+type ResultMetric interface {
+ Increment(code string, method string, host string)
+}
+
+var (
+ // RequestLatency is the latency metric that rest clients will update.
+ RequestLatency LatencyMetric = noopLatency{}
+ // RequestResult is the result metric that rest clients will update.
+ RequestResult ResultMetric = noopResult{}
+)
+
+// Register registers metrics for the rest client to use. This can
+// only be called once.
+func Register(lm LatencyMetric, rm ResultMetric) {
+ registerMetrics.Do(func() {
+ RequestLatency = lm
+ RequestResult = rm
+ })
+}
+
+type noopLatency struct{}
+
+func (noopLatency) Observe(string, url.URL, time.Duration) {}
+
+type noopResult struct{}
+
+func (noopResult) Increment(string, string, string) {}