#41993: make it possible to create N random60hz channels (#43295)

pkg/services/live/pipeline/devdata.go

@@ -99,7 +99,7 @@ type DevRuleBuilder struct {
 func (f *DevRuleBuilder) BuildRules(_ context.Context, _ int64) ([]*LiveChannelRule, error) {
 	return []*LiveChannelRule{
 		{
-			Pattern: "plugin/testdata/random-20Hz-stream",
+			Pattern: "plugin/testdata/random-20Hz-stream:rest",
 			DataOutputters: []DataOutputter{
 				NewLokiDataOutput(
 					os.Getenv("GF_LIVE_LOKI_ENDPOINT"),

pkg/tsdb/testdatasource/stream_handler.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"math/rand"
+	"regexp"
 	"strings"
 	"time"
 
@@ -11,6 +12,8 @@ import (
 	"github.com/grafana/grafana-plugin-sdk-go/data"
 )
 
+var random20HzStreamRegex = regexp.MustCompile(`random-20Hz-stream(-\d+)?`)
+
 func (s *Service) SubscribeStream(_ context.Context, req *backend.SubscribeStreamRequest) (*backend.SubscribeStreamResponse, error) {
 	s.logger.Debug("Allowing access to stream", "path", req.Path, "user", req.PluginContext.User)
 	initialData, err := backend.NewInitialFrame(s.frame, data.IncludeSchemaOnly)
@@ -55,31 +58,31 @@ func (s *Service) PublishStream(_ context.Context, req *backend.PublishStreamReq
 func (s *Service) RunStream(ctx context.Context, request *backend.RunStreamRequest, sender *backend.StreamSender) error {
 	s.logger.Debug("New stream call", "path", request.Path)
 	var conf testStreamConfig
-	switch request.Path {
-	case "random-2s-stream":
+	switch {
+	case request.Path == "random-2s-stream":
 		conf = testStreamConfig{
 			Interval: 2 * time.Second,
 		}
-	case "random-flakey-stream":
+	case request.Path == "random-flakey-stream":
 		conf = testStreamConfig{
 			Interval: 100 * time.Millisecond,
 			Drop:     0.75, // keep 25%
 		}
-	case "random-labeled-stream":
+	case request.Path == "random-labeled-stream":
 		conf = testStreamConfig{
 			Interval: 200 * time.Millisecond,
 			Drop:     0.2, // keep 80%
 			Labeled:  true,
 		}
-	case "random-20Hz-stream":
-		conf = testStreamConfig{
-			Interval: 50 * time.Millisecond,
-		}
-	case "flight-5hz-stream":
+	case request.Path == "flight-5hz-stream":
 		conf = testStreamConfig{
 			Interval: 200 * time.Millisecond,
 			Flight:   newFlightConfig(),
 		}
+	case random20HzStreamRegex.MatchString(request.Path):
+		conf = testStreamConfig{
+			Interval: 50 * time.Millisecond,
+		}
 	default:
 		return fmt.Errorf("testdata plugin does not support path: %s", request.Path)
 	}