71 lines
1.8 KiB
Go
71 lines
1.8 KiB
Go
// +build ignore
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package prometheus
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import (
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"errors"
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"time"
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"github.com/unistack-org/micro/v3/metadata"
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)
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// ErrPrometheusPanic is a catch-all for the panics which can be thrown by the Prometheus client:
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var ErrPrometheusPanic = errors.New("The Prometheus client panicked. Did you do something like change the tag cardinality or the type of a metric?")
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// Count is a counter with key/value tags:
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// New values are added to any previous one (eg "number of hits")
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func (r *Reporter) Count(name string, value int64, tags metadata.Metadata) (err error) {
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defer func() {
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if r := recover(); r != nil {
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err = ErrPrometheusPanic
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}
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}()
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counter := r.metrics.getCounter(r.stripUnsupportedCharacters(name), r.listTagKeys(tags))
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metric, err := counter.GetMetricWith(r.convertTags(tags))
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if err != nil {
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return err
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}
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metric.Add(float64(value))
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return err
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}
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// Gauge is a register with key/value tags:
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// New values simply override any previous one (eg "current connections")
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func (r *Reporter) Gauge(name string, value float64, tags metadata.Metadata) (err error) {
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defer func() {
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if r := recover(); r != nil {
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err = ErrPrometheusPanic
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}
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}()
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gauge := r.metrics.getGauge(r.stripUnsupportedCharacters(name), r.listTagKeys(tags))
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metric, err := gauge.GetMetricWith(r.convertTags(tags))
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if err != nil {
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return err
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}
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metric.Set(value)
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return err
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}
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// Timing is a histogram with key/valye tags:
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// New values are added into a series of aggregations
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func (r *Reporter) Timing(name string, value time.Duration, tags metadata.Metadata) (err error) {
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defer func() {
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if r := recover(); r != nil {
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err = ErrPrometheusPanic
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}
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}()
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timing := r.metrics.getTiming(r.stripUnsupportedCharacters(name), r.listTagKeys(tags))
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metric, err := timing.GetMetricWith(r.convertTags(tags))
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if err != nil {
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return err
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}
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metric.Observe(value.Seconds())
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return err
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}
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