Merge pull request #13 from Decard6/feature/separate-metrics-server

gin-metrics support separate metric port

ginmetrics/middleware.go

@@ -33,6 +33,23 @@ func (m *Monitor) Use(r gin.IRoutes) {
 	})
 }
 
+// UseWithoutExposingEndpoint is used to add monitor interceptor to gin router
+// It can be called multiple times to intercept from multiple gin.IRoutes
+// http path is not set, to do that use Expose function
+func (m *Monitor) UseWithoutExposingEndpoint(r gin.IRoutes) {
+	m.initGinMetrics()
+	r.Use(m.monitorInterceptor)
+}
+
+// Expose adds metric path to a given router.
+// The router can be different than the one passed to UseWithoutExposingEndpoint.
+// This alows to expose metrics on different port.
+func (m *Monitor) Expose(r gin.IRoutes) {
+	r.GET(m.metricPath, func(ctx *gin.Context) {
+		promhttp.Handler().ServeHTTP(ctx.Writer, ctx.Request)
+	})
+}
+
 // initGinMetrics used to init gin metrics
 func (m *Monitor) initGinMetrics() {
 	bloomFilter = bloom.NewBloomFilter()