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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| package services | ||
|
|
||
| import ( | ||
| "net/http" | ||
|
|
||
| "github.com/prometheus/client_golang/prometheus" | ||
| "github.com/prometheus/client_golang/prometheus/promhttp" | ||
| ) | ||
|
|
||
| var ( | ||
| requestDuration = prometheus.NewHistogramVec( | ||
| prometheus.HistogramOpts{ | ||
| Name: "http_request_duration_seconds", | ||
| Help: "Histogram of latencies for HTTP requests.", | ||
| Buckets: prometheus.DefBuckets, | ||
| }, | ||
| []string{"handler", "code", "method"}, | ||
| ) | ||
| requestTotal = prometheus.NewCounterVec( | ||
| prometheus.CounterOpts{ | ||
| Name: "http_request_total", | ||
| Help: "Total number of HTTP requests made.", | ||
| }, []string{"handler", "code", "method"}) | ||
|
|
||
| serverCount = prometheus.NewGaugeVec( | ||
| prometheus.GaugeOpts{ | ||
| Name: "server_count", | ||
| Help: "Count of game server", | ||
| }, []string{}) | ||
| ) | ||
|
|
||
| type MetricService interface { | ||
| Register() | ||
| Handler() http.Handler | ||
| IncServerCount() | ||
| DecServerCount() | ||
| ObserveRequestDuration(handler, code, method string, duration float64) | ||
| IncRequestTotal(handler, code, method string) | ||
| } | ||
|
|
||
| type metricService struct { | ||
| requestDuration *prometheus.HistogramVec | ||
| requestTotal *prometheus.CounterVec | ||
| serverCount *prometheus.GaugeVec | ||
| } | ||
|
|
||
| func NewMetricService() MetricService { | ||
| return &metricService{ | ||
| requestDuration: requestDuration, | ||
| requestTotal: requestTotal, | ||
| serverCount: serverCount, | ||
| } | ||
| } | ||
|
|
||
| func (s *metricService) Register() { | ||
| prometheus.MustRegister(s.requestDuration) | ||
| prometheus.MustRegister(s.requestTotal) | ||
| prometheus.MustRegister(s.serverCount) | ||
| } | ||
|
|
||
| func (s *metricService) Handler() http.Handler { | ||
| return promhttp.Handler() | ||
| } | ||
|
|
||
| func (s *metricService) IncServerCount() { | ||
| s.serverCount.WithLabelValues().Inc() | ||
| } | ||
|
|
||
| func (s *metricService) DecServerCount() { | ||
| s.serverCount.WithLabelValues().Dec() | ||
| } | ||
|
|
||
| func (s *metricService) ObserveRequestDuration(handler, code, method string, duration float64) { | ||
| s.requestDuration.WithLabelValues(handler, code, method).Observe(duration) | ||
| } | ||
|
|
||
| func (s *metricService) IncRequestTotal(handler, code, method string) { | ||
| s.requestTotal.WithLabelValues(handler, code, method).Inc() | ||
| } |
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