Merge pull request #510 from prometheus/beorn7/timer
Return observed duration from Timer.ObserveDuration
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2df5ba38ef
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@ -39,13 +39,16 @@ func NewTimer(o Observer) *Timer {
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// ObserveDuration records the duration passed since the Timer was created with
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// NewTimer. It calls the Observe method of the Observer provided during
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// construction with the duration in seconds as an argument. ObserveDuration is
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// usually called with a defer statement.
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// construction with the duration in seconds as an argument. The observed
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// duration is also returned. ObserveDuration is usually called with a defer
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// statement.
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//
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// Note that this method is only guaranteed to never observe negative durations
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// if used with Go1.9+.
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func (t *Timer) ObserveDuration() {
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func (t *Timer) ObserveDuration() time.Duration {
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d := time.Since(t.begin)
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if t.observer != nil {
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t.observer.Observe(time.Since(t.begin).Seconds())
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t.observer.Observe(d.Seconds())
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}
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return d
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}
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