fix: Rebuild the datasource when settings change

pkg/athena/routes/routes.go

@@ -40,7 +40,7 @@ func (r *AthenaResourceHandler) workgroups(rw http.ResponseWriter, req *http.Req
 	routes.SendResources(rw, res, err)
 }
 
-func (r *(AthenaResourceHandler)) workgroupEngineVersion(rw http.ResponseWriter, req *http.Request) {
+func (r *AthenaResourceHandler) workgroupEngineVersion(rw http.ResponseWriter, req *http.Request) {
 	reqBody, err := routes.ParseBody(req.Body)
 	if err != nil {
 		rw.WriteHeader(http.StatusBadRequest)

pkg/main.go

@@ -1,6 +1,9 @@
 package main
 
 import (
+	"context"
+	"github.com/grafana/grafana-plugin-sdk-go/backend"
+	"github.com/grafana/grafana-plugin-sdk-go/backend/instancemgmt"
 	"os"
 
 	"github.com/grafana/athena-datasource/pkg/athena"
@@ -12,18 +15,24 @@ import (
 
 func main() {
 	// Start listening to requests sent from Grafana.
-	s := athena.New()
-	ds := awsds.NewAsyncAWSDatasource(s)
-	ds.Completable = s
-	ds.EnableMultipleConnections = true
-	ds.CustomRoutes = routes.New(s).Routes()
-
 	if err := datasource.Manage(
 		"grafana-athena-datasource",
-		ds.NewDatasource,
+		MakeDatasourceFactory(),
 		datasource.ManageOpts{},
 	); err != nil {
 		log.DefaultLogger.Error(err.Error())
 		os.Exit(1)
 	}
 }
+
+func MakeDatasourceFactory() datasource.InstanceFactoryFunc {
+	return func(ctx context.Context, settings backend.DataSourceInstanceSettings) (instancemgmt.Instance, error) {
+		log.DefaultLogger.FromContext(ctx).Debug("building new datasource instance")
+		s := athena.New()
+		ds := awsds.NewAsyncAWSDatasource(s)
+		ds.Completable = s
+		ds.EnableMultipleConnections = true
+		ds.CustomRoutes = routes.New(s).Routes()
+		return ds.NewDatasource(ctx, settings)
+	}
+}