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port_metrics.go
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port_metrics.go
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package monitor
import (
"github.com/go-kit/kit/metrics"
"github.com/go-kit/kit/metrics/discard"
"github.com/go-kit/kit/metrics/prometheus"
stdprometheus "github.com/prometheus/client_golang/prometheus"
"strconv"
"sync"
)
var (
portMetrics *PortMetrics
initPortMetrics sync.Once
)
// PortMetrics monitors connecting number
type PortMetrics struct {
ConnectingNums metrics.Gauge
}
// GetPortMetrics returns Metrics build using Prometheus client library if Prometheus is enabled
// Otherwise, it returns no-op Metrics
func GetPortMetrics() *PortMetrics {
initPortMetrics.Do(func() {
if DefaultPrometheusConfig().Prometheus {
portMetrics = NewPortMetrics()
} else {
portMetrics = NopPortMetrics()
}
})
return portMetrics
}
// NewPortMetrics returns a pointer of a new PortMetrics object
func NewPortMetrics(labelsAndValues ...string) *PortMetrics {
return &PortMetrics{
ConnectingNums: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: xNameSpace,
Subsystem: portSubSystem,
Name: "connecting",
Help: "connecting number of each port",
}, []string{portSubSystem}).With(labelsAndValues...),
}
}
// NopPortMetrics returns a pointer of a no-op Metrics
func NopPortMetrics() *PortMetrics {
return &PortMetrics{
ConnectingNums: discard.NewGauge(),
}
}
//SetConnectingNums sets connectingNums by connecting number of each port
func (portMetrics *PortMetrics) SetConnectingNums(connectingMap map[uint64]int) {
if nil == connectingMap {
return
}
for port, num := range connectingMap {
portMetrics.ConnectingNums.With(portSubSystem, strconv.FormatUint(port, 10)).Set(float64(num))
}
}