Merge pull request #1754 from nats-io/mqtt

[ADDED] MQTT Support

server/stream.go

@@ -51,6 +51,12 @@ type StreamConfig struct {
 	NoAck        bool            `json:"no_ack,omitempty"`
 	Template     string          `json:"template_owner,omitempty"`
 	Duplicates   time.Duration   `json:"duplicate_window,omitempty"`
+
+	// These are non public configuration options.
+	// If you add new options, check fileStreamInfoJSON in order for them to
+	// be properly persisted/recovered, if needed.
+	internal       bool
+	allowNoSubject bool
 }
 
 const JSApiPubAckResponseType = "io.nats.jetstream.api.v1.pub_ack_response"
@@ -467,7 +473,9 @@ func checkStreamCfg(config *StreamConfig) (StreamConfig, error) {
 	}
 
 	if len(cfg.Subjects) == 0 {
-		cfg.Subjects = append(cfg.Subjects, cfg.Name)
+		if !cfg.allowNoSubject {
+			cfg.Subjects = append(cfg.Subjects, cfg.Name)
+		}
 	} else {
 		// We can allow overlaps, but don't allow direct duplicates.
 		dset := make(map[string]struct{}, len(cfg.Subjects))