Live: broadcast events when dashboard is saved (#27583)

Co-authored-by: kay delaney <45561153+kaydelaney@users.noreply.github.com>
Co-authored-by: Torkel Ödegaard <torkel@grafana.org>

pkg/api/dashboard.go

@@ -262,6 +262,17 @@ func (hs *HTTPServer) PostDashboard(c *models.ReqContext, cmd models.SaveDashboa
 		}
 	}
 
+	// Tell everyone listening that the dashboard changed
+	if hs.Live != nil {
+		err := hs.Live.GrafanaScope.Dashboards.DashboardSaved(
+			dashboard.Uid,
+			c.UserId,
+		)
+		if err != nil {
+			hs.log.Warn("unable to broadcast save event", "uid", dashboard.Uid, "error", err)
+		}
+	}
+
 	c.TimeRequest(metrics.MApiDashboardSave)
 	return JSON(200, util.DynMap{
 		"status":  "success",

pkg/api/http_server.go

@@ -79,15 +79,11 @@ func (hs *HTTPServer) Init() error {
 
 	// Set up a websocket broker
 	if hs.Cfg.IsLiveEnabled() { // feature flag
-		node, err := live.InitalizeBroker()
+		node, err := live.InitializeBroker()
 		if err != nil {
 			return err
 		}
 		hs.Live = node
-
-		// Spit random walk to example
-		go live.RunRandomCSV(hs.Live, "grafana/testdata/random-2s-stream", 2000, 0)
-		go live.RunRandomCSV(hs.Live, "grafana/testdata/random-flakey-stream", 400, .6)
 	}
 
 	hs.macaron = hs.newMacaron()