forked from mirror/client_golang
54 lines
1.3 KiB
Go
54 lines
1.3 KiB
Go
// Copyright 2016 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package prometheus
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import "time"
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// Observer is the interface that wraps the Observe method, used by Histogram
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// and Summary to add observations.
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type Observer interface {
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Observe(float64)
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}
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type observerFunc func(float64)
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func (o observerFunc) Observe(value float64) {
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o(value)
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}
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type Timer struct {
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begin time.Time
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observer Observer
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}
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func NewTimer() *Timer {
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return &Timer{begin: time.Now()}
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}
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func (t *Timer) With(o Observer) *Timer {
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t.observer = o
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return t
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}
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func (t *Timer) WithGauge(g Gauge) *Timer {
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t.observer = observerFunc(g.Set)
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return t
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}
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func (t *Timer) ObserveDuration() {
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if t.observer != nil {
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t.observer.Observe(time.Since(t.begin).Seconds())
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}
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}
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