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98 lines
2.9 KiB
98 lines
2.9 KiB
package metric
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import "errors"
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// Opts contains the common arguments for creating Metric.
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type Opts struct {
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}
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// Metric is a sample interface.
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// Implementations of Metrics in metric package are Counter, Gauge,
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// PointGauge, RollingCounter and RollingGauge.
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type Metric interface {
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// Add adds the given value to the counter.
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Add(int64)
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// Value gets the current value.
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// If the metric's type is PointGauge, RollingCounter, RollingGauge,
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// it returns the sum value within the window.
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Value() int64
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}
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// Aggregation contains some common aggregation function.
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// Each aggregation can compute summary statistics of window.
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type Aggregation interface {
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// Min finds the min value within the window.
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Min() float64
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// Max finds the max value within the window.
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Max() float64
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// Avg computes average value within the window.
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Avg() float64
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// Sum computes sum value within the window.
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Sum() float64
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}
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// VectorOpts contains the common arguments for creating vec Metric..
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type VectorOpts struct {
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Namespace string
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Subsystem string
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Name string
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Help string
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Labels []string
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}
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const (
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_businessNamespace = "business"
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_businessSubsystemCount = "count"
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_businessSubSystemGauge = "gauge"
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_businessSubSystemHistogram = "histogram"
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)
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var (
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_defaultBuckets = []float64{5, 10, 25, 50, 100, 250, 500},
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)
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// NewBusinessMetricCount business Metric count vec.
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// name or labels should not be empty.
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func NewBusinessMetricCount(name string, labels ...string) CounterVec {
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if name == "" || len(labels) == 0 {
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panic(errors.New("stat:metric business count metric name should not be empty or labels length should be greater than zero"))
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}
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return NewCounterVec(&CounterVecOpts{
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Namespace: _businessNamespace,
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Subsystem: _businessSubsystemCount,
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Name: name,
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Labels: labels,
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})
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}
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// NewBusinessMetricGauge business Metric gauge vec.
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// name or labels should not be empty.
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func NewBusinessMetricGauge(name string, labels ...string) GaugeVec {
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if name == "" || len(labels) == 0 {
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panic(errors.New("stat:metric business gauge metric name should not be empty or labels length should be greater than zero"))
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}
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return NewGaugeVec(&GaugeVecOpts{
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Namespace: _businessNamespace,
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Subsystem: _businessSubSystemGauge,
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Name: name,
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Labels: labels,
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})
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}
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// NewBusinessMetricHistogram business Metric histogram vec.
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// name or labels should not be empty.
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func NewBusinessMetricHistogram(name string, buckets []float64, labels ...string) HistogramVec {
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if name == "" || len(labels) == 0 {
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panic(errors.New("stat:metric business histogram metric name should not be empty or labels length should be greater than zero"))
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}
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if len(buckets) == 0 {
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buckets = _defaultBuckets
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}
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return NewHistogramVec(&HistogramVecOpts{
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Namespace: _businessNamespace,
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Subsystem: _businessSubSystemHistogram,
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Name: name,
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Labels: labels,
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Buckets: buckets,
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})
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}
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