WIP metrics

server/server_manager.go

@@ -83,6 +83,12 @@ func (s *Server) execManager() {
 			"emails_sent_failure":     sentMailFailure,
 		}).
 		Info("Server stats")
+	if s.httpMetricsServer != nil {
+		metrics.messagesCached.Set(float64(messagesCached))
+		metrics.visitors.Set(float64(visitorsCount))
+		metrics.subscribers.Set(float64(subscribers))
+		metrics.topics.Set(float64(topicsCount))
+	}
 }
 
 func (s *Server) pruneVisitors() {