B4J Question How can i monitor on desktop a Non UI app

[ocalle]

Hi, Im using JRC2, when i do release version cant see what happen on server as see in debug with logs.
Is there a way to show something on screen to see its running?
or a Iconize.
Well any suggest wellcomed.

Thanks

 

[AHilton]

A few suggestions...

1) A basic one is to just direct all logging to a file with (do a forum search for more info on this) and just open the file when you want to see what's going on:

    #If RELEASE
        ' Anything that would normally show in the console (log(), errors, etc.) will go to this file so that I can see what's going on later
        Utils.RedirectOutputToFile(File.DirApp & DirectorySeparator & "logs", "logs.txt")
    #End If

' Redirects Output to a file
' Usage: RedirectOutput(File.DirApp, "logs.txt")
Sub RedirectOutputToFile (Dir As String, FileName As String)
    #if RELEASE
        Dim out As OutputStream = File.OpenOutput(Dir, FileName, True) 'Set to True to append the logs
        Dim ps As JavaObject
        ps.InitializeNewInstance("java.io.PrintStream", Array(out, True, "utf8"))
        Dim jo As JavaObject
        jo.InitializeStatic("java.lang.System")
        jo.RunMethod("setOut", Array(ps))
        jo.RunMethod("setErr", Array(ps))
    #end if
End Sub
' Redirects Output back to the (standard) screen
Sub RedirectOutputToScreen (Dir As String, FileName As String)
    #if RELEASE
        Dim out As OutputStream = File.OpenOutput(Dir, FileName, False) 'Set to True to append the logs
        Dim ps As JavaObject
        ps.InitializeNewInstance("java.io.PrintStream", Array(out, True, "utf8"))
        Dim fd As JavaObject
        fd.InitializeStatic("java.io.FileDescriptor")
        Dim jout As JavaObject
        jout.InitializeNewInstance("java.io.FileOutputStream", Array(fd.GetField("out")))
        ps.InitializeNewInstance("java.io.PrintStream", Array(jout, True, "utf8"))

        Dim jo As JavaObject
        jo.InitializeStatic("java.lang.System")
        jo.RunMethod("setOut", Array(ps))
        jo.RunMethod("setErr", Array(ps))
    #end if
End Sub

2) Do #1 (above) but make it prettier, indexable, etc. by making a simple GUI B4J app that reads the file created. Or, alternatively, have your NON-GUI B4J app write to a database instead of log() that your GUI app then reads.

3) Make a GUI B4J app that connects to your NON-GUI B4J app (via Websockets, for example) that not only can read the log() output / database but can also interact with the NON-GUI B4J app itself to control / test / update / restart / whatever it.

I'm sure there are other options. Just do a search.

 

[roerGarcia]

In the example of DataCollectionServer, DataCollectionDevice and DataCollectionDesktop, how is it known that the Server is still working (1) and (2) how is the server of this example stopped? (Google translated)

https://www.b4x.com/android/forum/t...olution-device-desktop-and-web-reports.37254/

 

[roerGarcia]

I get it.

A line like this is needed

   ExitApplication2(0) 'exit the application. Without this call the program will just hang.