B4J Question Check if jRDC2 is running

[h725]

Hello everybody.
I would like to check if the jRDC2 server is running.
I found the following entry:
https://www.b4x.com/android/forum/threads/check-if-the-jar-is-already-runing.57554

I would like to check and manage the serverstate (start the server if it not running) from outside (VB-program). Checking if java.exe is running does not make so much sense.

h725

EDIT:
3 minutes after posting this entry I got an idea which might suit for me.
I have a snippet :

  Private Function IsPortOpen(ByVal Host As String, ByVal PortNumber As Integer) As Boolean
        Dim Client As TcpClient = Nothing
        Try
            Client = New TcpClient(Host, PortNumber)
            Return True
        Catch ex As SocketException
            Return False
        Finally
            If Not Client Is Nothing Then
                Client.Close()
            End If
        End Try
    End Function

Which checks if the port opens. I started and stopped the jRDC2 server and it obviously gives the correct response back. Are there any objections in using this ?

 

[Erel]

Why use VB?

Call the test handler with HttpUtils2 from a B4J program. This is the best way to check that it is running.