labels are used to create folder structue on subscriber

example/OpCommandRequest.json

@@ -1,6 +1,6 @@
 [
     {
-        
+        "label":"opcommand_logs",
         "toNode": "ship1",
         "data": ["ps"],
         "method":"OpCommandRequest",

message_and_subject.go

@@ -16,7 +16,7 @@ type Message struct {
 	// information that can be used on the subscriber side to for
 	// example create specific folders using the Format name to
 	// logically group data recevied.
-	Label string
+	Label string `json:"label" yaml:"label"`
 	// The node to send the message to
 	ToNode node `json:"toNode" yaml:"toNode"`
 	// The Unique ID of the message
@@ -78,6 +78,9 @@ type Subject struct {
 	// from routeMessagesToPublish in *server.
 	// This channel is only used for publishing processes.
 	messageCh chan Message
+	// Label, single word used to describe the data content. For example
+	// syslog, metrics, etc.
+	Label string
 }
 
 // newSubject will return a new variable of the type subject, and insert

read_socket.go

@@ -104,6 +104,7 @@ func newSAM(m Message) (subjectAndMessage, error) {
 		ToNode:         string(m.ToNode),
 		CommandOrEvent: tmpH.getKind(),
 		Method:         m.Method,
+		Label:          m.Label,
 	}
 
 	sm := subjectAndMessage{

subscriber_method_types.go

@@ -252,6 +252,8 @@ func (m methodOpCommandRequest) handler(proc process, message Message, node stri
 		switch {
 		case message.Data[0] == "ps":
 			proc.processes.mu.Lock()
+			// Loop the the processes map, and find all that is active to
+			// be returned in the reply message.
 			for _, v := range proc.processes.active {
 				s := fmt.Sprintf("* proc - : %v, id: %v, name: %v, allowed from: %s\n", v.processKind, v.processID, v.subject.name(), v.allowedReceivers)
 				sb := []byte(s)
@@ -290,7 +292,21 @@ func newReplyMessage(proc process, message Message, method Method, outData []byt
 		Retries:                message.RequestRetries,
 		PreviousMessageSubject: proc.subject,
 	}
-	fmt.Printf("   ** %#v\n", newMsg)
+
+	// The label field is part of the subject struct, but it is not
+	// used for creating subjects for Nats messages.
+	// The label field is set in the individual message that are brought
+	// into the system via the socket.
+	// since the process don't care or knows about the labels for the message
+	// handling we need to manually add it here on the message level,
+	// so the receiving subscriber gets that information.
+	//
+	// NB: This would probably be better handled if the Message rather
+	// contained the whole previous message instead of using the previous
+	// subject, but when testing it seemed to fail to unmarshal a *message
+	// field in the message struct. That is also why the previousSubject
+	// field were introduced to avoid having a field with *previousMessage.
+	newMsg.PreviousMessageSubject.Label = message.Label
 
 	nSAM, err := newSAM(newMsg)
 	if err != nil {
@@ -355,8 +371,9 @@ func (m methodTextLogging) getKind() CommandOrEvent {
 }
 
 func (m methodTextLogging) handler(proc process, message Message, node string) ([]byte, error) {
-	// Recreate the subject structure for the message, so we can use
-	// it in the naming of the files to create.
+
+	// If it was a request type message we want to check what the initial messages
+	// method, so we can use that in creating the file name to store the data.
 	var fileName string
 	switch {
 	case message.PreviousMessageSubject.ToNode != "":
@@ -365,8 +382,21 @@ func (m methodTextLogging) handler(proc process, message Message, node string) (
 		fileName = fmt.Sprintf("%v.%v.log", message.FromNode, message.Method)
 	}
 
-	logFile := filepath.Join(proc.configuration.SubscribersDataFolder, fileName)
-	f, err := os.OpenFile(logFile, os.O_APPEND|os.O_RDWR|os.O_CREATE, os.ModeAppend)
+	// Check if folder structure exist, if not create it.
+	folderTree := filepath.Join(proc.configuration.SubscribersDataFolder, message.PreviousMessageSubject.Label, message.PreviousMessageSubject.ToNode)
+
+	if _, err := os.Stat(folderTree); os.IsNotExist(err) {
+		err := os.MkdirAll(folderTree, 0700)
+		if err != nil {
+			return nil, fmt.Errorf("error: failed to create directory %v: %v", folderTree, err)
+		}
+
+		log.Printf("info: Creating subscribers data folder at %v\n", folderTree)
+	}
+
+	// Open file and write data.
+	file := filepath.Join(folderTree, fileName)
+	f, err := os.OpenFile(file, os.O_APPEND|os.O_RDWR|os.O_CREATE, os.ModeAppend)
 	if err != nil {
 		log.Printf("error: methodEventTextLogging.handler: failed to open file: %v\n", err)
 		return nil, err