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62 lines
1.4 KiB
62 lines
1.4 KiB
package metric
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import "time"
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var _ Metric = &rollingGauge{}
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var _ Aggregation = &rollingGauge{}
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// RollingGauge represents a ring window based on time duration.
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// e.g. [[1, 2], [1, 2, 3], [1,2, 3, 4]]
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type RollingGauge interface {
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Metric
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Aggregation
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// Reduce applies the reduction function to all buckets within the window.
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Reduce(func(Iterator) float64) float64
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}
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// RollingGaugeOpts contains the arguments for creating RollingGauge.
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type RollingGaugeOpts struct {
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Size int
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BucketDuration time.Duration
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}
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type rollingGauge struct {
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policy *RollingPolicy
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}
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// NewRollingGauge creates a new RollingGauge baseed on RollingGaugeOpts.
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func NewRollingGauge(opts RollingGaugeOpts) RollingGauge {
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window := NewWindow(WindowOpts{Size: opts.Size})
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policy := NewRollingPolicy(window, RollingPolicyOpts{BucketDuration: opts.BucketDuration})
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return &rollingGauge{
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policy: policy,
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}
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}
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func (r *rollingGauge) Add(val int64) {
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r.policy.Append(float64(val))
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}
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func (r *rollingGauge) Reduce(f func(Iterator) float64) float64 {
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return r.policy.Reduce(f)
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}
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func (r *rollingGauge) Avg() float64 {
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return r.policy.Reduce(Avg)
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}
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func (r *rollingGauge) Min() float64 {
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return r.policy.Reduce(Min)
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}
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func (r *rollingGauge) Max() float64 {
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return r.policy.Reduce(Max)
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}
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func (r *rollingGauge) Sum() float64 {
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return r.policy.Reduce(Sum)
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}
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func (r *rollingGauge) Value() int64 {
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return int64(r.Sum())
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}
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