ceph-csi/vendor/github.com/armon/go-metrics/sink.go
dependabot[bot] 9b6795c6d6 rebase: bump github.com/hashicorp/vault from 1.9.9 to 1.11.9
Bumps [github.com/hashicorp/vault](https://github.com/hashicorp/vault) from 1.9.9 to 1.11.9.
- [Release notes](https://github.com/hashicorp/vault/releases)
- [Changelog](https://github.com/hashicorp/vault/blob/main/CHANGELOG.md)
- [Commits](https://github.com/hashicorp/vault/compare/v1.9.9...v1.11.9)

---
updated-dependencies:
- dependency-name: github.com/hashicorp/vault
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
2023-05-11 10:34:11 +00:00

116 lines
3.7 KiB
Go

package metrics
import (
"fmt"
"net/url"
)
// The MetricSink interface is used to transmit metrics information
// to an external system
type MetricSink interface {
// A Gauge should retain the last value it is set to
SetGauge(key []string, val float32)
SetGaugeWithLabels(key []string, val float32, labels []Label)
// Should emit a Key/Value pair for each call
EmitKey(key []string, val float32)
// Counters should accumulate values
IncrCounter(key []string, val float32)
IncrCounterWithLabels(key []string, val float32, labels []Label)
// Samples are for timing information, where quantiles are used
AddSample(key []string, val float32)
AddSampleWithLabels(key []string, val float32, labels []Label)
}
// BlackholeSink is used to just blackhole messages
type BlackholeSink struct{}
func (*BlackholeSink) SetGauge(key []string, val float32) {}
func (*BlackholeSink) SetGaugeWithLabels(key []string, val float32, labels []Label) {}
func (*BlackholeSink) EmitKey(key []string, val float32) {}
func (*BlackholeSink) IncrCounter(key []string, val float32) {}
func (*BlackholeSink) IncrCounterWithLabels(key []string, val float32, labels []Label) {}
func (*BlackholeSink) AddSample(key []string, val float32) {}
func (*BlackholeSink) AddSampleWithLabels(key []string, val float32, labels []Label) {}
// FanoutSink is used to sink to fanout values to multiple sinks
type FanoutSink []MetricSink
func (fh FanoutSink) SetGauge(key []string, val float32) {
fh.SetGaugeWithLabels(key, val, nil)
}
func (fh FanoutSink) SetGaugeWithLabels(key []string, val float32, labels []Label) {
for _, s := range fh {
s.SetGaugeWithLabels(key, val, labels)
}
}
func (fh FanoutSink) EmitKey(key []string, val float32) {
for _, s := range fh {
s.EmitKey(key, val)
}
}
func (fh FanoutSink) IncrCounter(key []string, val float32) {
fh.IncrCounterWithLabels(key, val, nil)
}
func (fh FanoutSink) IncrCounterWithLabels(key []string, val float32, labels []Label) {
for _, s := range fh {
s.IncrCounterWithLabels(key, val, labels)
}
}
func (fh FanoutSink) AddSample(key []string, val float32) {
fh.AddSampleWithLabels(key, val, nil)
}
func (fh FanoutSink) AddSampleWithLabels(key []string, val float32, labels []Label) {
for _, s := range fh {
s.AddSampleWithLabels(key, val, labels)
}
}
// sinkURLFactoryFunc is an generic interface around the *SinkFromURL() function provided
// by each sink type
type sinkURLFactoryFunc func(*url.URL) (MetricSink, error)
// sinkRegistry supports the generic NewMetricSink function by mapping URL
// schemes to metric sink factory functions
var sinkRegistry = map[string]sinkURLFactoryFunc{
"statsd": NewStatsdSinkFromURL,
"statsite": NewStatsiteSinkFromURL,
"inmem": NewInmemSinkFromURL,
}
// NewMetricSinkFromURL allows a generic URL input to configure any of the
// supported sinks. The scheme of the URL identifies the type of the sink, the
// and query parameters are used to set options.
//
// "statsd://" - Initializes a StatsdSink. The host and port are passed through
// as the "addr" of the sink
//
// "statsite://" - Initializes a StatsiteSink. The host and port become the
// "addr" of the sink
//
// "inmem://" - Initializes an InmemSink. The host and port are ignored. The
// "interval" and "duration" query parameters must be specified with valid
// durations, see NewInmemSink for details.
func NewMetricSinkFromURL(urlStr string) (MetricSink, error) {
u, err := url.Parse(urlStr)
if err != nil {
return nil, err
}
sinkURLFactoryFunc := sinkRegistry[u.Scheme]
if sinkURLFactoryFunc == nil {
return nil, fmt.Errorf(
"cannot create metric sink, unrecognized sink name: %q", u.Scheme)
}
return sinkURLFactoryFunc(u)
}