B4J Question Command line args

[hakha4]

Erel! I wrongly posted this on B4A forum,can you remove that thread,I don't know if I can do that.

I made a small B4j app launced by a bat-file from a Pc prog for communicate to a Raspberry pi and it works ok. It consumes some time though to launch the B4j app everytime a msg is to be sent (every 5-10 secs). To speed up things I want the app to be launched just once.Is there a way to make a B4j app to listen for incomming commands (like vb6 'command$') ? I have not find info about this on forum.

Any tips on how to optimize code below also welcome!

'Non-UI application (console application)
#Region  Project Attributes
'  #CommandLineArgs: TEST
#End Region

Sub Process_Globals
Dim TcpStreams             As AsyncStreams
Dim Socket1             As Socket
Dim StringToSend As String
End Sub

Sub AppStart (Args() As String)
   If Args.Length = 0 Then
     Log("Arguments missing")
     ExitApplication2(1)
   End If
 
   'socket for connecting to 'Raspberry Pi-gateway on port 32340
    Socket1.Initialize("Socket1")
    Socket1.Connect("192.168.1.4",32340,5000)
    StringToSend = Args(0)
   
       
   StartMessageLoop
End Sub



Sub Socket1_Connected(Connected As Boolean)As Boolean
    If Connected = True Then
   
        TcpStreams.Initialize(Socket1.InputStream,Socket1.OutputStream,"tcpStreams")
       
        Try
            SendData(StringToSend)
            Catch
            Log("Send Error")
        End Try   
    End If
End Sub

Sub SendData(Msg As String)'to Pi Gateway (port 32340)
    Dim Buffer() As Byte
     
    If Socket1.Connected = True Then
        Try
            Buffer = Msg.GetBytes("UTF8")
            TcpStreams.Write(Buffer)
            Log("Data sent")
            ExitApplication2(1)
        Catch
            Log("TcpStreams.Write Error")
        End Try
    Else
        Log("Connection lost")
    End If
       
End Sub

Regards Håkan

 

[Erel]

You cannot listen to new command line arguments.

You can open a socket and listen for connections. However I think that a much better solution will be to implement a small http server and then you can communicate with it through the browser. It is quite simple.

 

[hakha4]

Thank's for reply. I've read most of the tutorials but I'm a bit confused and unsure where to start. I need a small frame for a http server to start with,can you point me to that?
Regards Håkan

 

[Erel]

Start with this one: https://www.b4x.com/android/forum/threads/server-building-web-servers-with-b4j.37172/#content

 

[hakha4]

Thank's,I'll start there.