B4J Question java.exe arguments in shell

le_toubib · Jul 18, 2024

hi all
this didn't run , what am i doing wrong ?

java.exe arguments in shell:

    Dim shl As Shell
    Try
        shl.Initialize("shl","java.exe", Array As String("-Xms1024m","-Xmx1024m", "-jar", "D:\test.jar"))
        shl.WorkingDirectory="D:\"
        shl.Run(-1)
    Catch
        Log(LastException.Message)
    End Try

thanks

Gandalf · Jul 19, 2024

Try adding this sub:

B4X:

Sub shl_ProcessCompleted (Success As Boolean, ExitCode As Int, StdOut As String, StdErr As String)
    If Success And ExitCode = 0 Then
        Log(StdOut)
    Else
        Log("Error: " & StdErr)
    End If
End Sub

And look what will be in the logs. If there's nothing, try setting timeout in shl.Run (instead of -1, set something like 3000, which is 3 seconds)

le_toubib · Jul 19, 2024

B4X:
Try adding this sub:

B4X:

Sub shl_ProcessCompleted (Success As Boolean, ExitCode As Int, StdOut As String, StdErr As String) If Success And ExitCode = 0 Then Log(StdOut) Else Log("Error: " & StdErr) End If End Sub

And look what will be in the logs. If there's nothing, try setting timeout in shl.Run (instead of -1, set something like 3000, which is 3 seconds)

i set timeout to 3000 , i'm not sure if it reached to shl_ProcessCompleted ,
i got this error log:

java.lang.NoClassDefFoundError: anywheresoftware/b4j/objects/Shell
at b4j.example.main._timer3_tick(main.java:720)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:109)
at anywheresoftware.b4a.objects.Timer$TickTack$1.run(Timer.java:135)
at com.sun.javafx.application.PlatformImpl.lambda$null$173(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(Unknown Source)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: anywheresoftware.b4j.objects.Shell
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 14 more

Daestrum · Jul 19, 2024

you could try something like

B4X:

    Dim shl As Shell
    Dim parms As List
    parms.Initialize
    parms.Add("-Xms1024m")
    parms.Add("-Xmx1024m")
    parms.Add("-jar")
    parms.Add("test.jar")
    shl.Initialize("shl","java.exe", parms)
    shl.WorkingDirectory="d:/"

    shl.Run(-1)
    
    Wait For shl_ProcessCompleted (Success As Boolean, ExitCode As Int, StdOut As String, StdErr As String)

    If Success Then
        Log("Success")
        Log(StdOut)
        Log(ExitCode)
    Else
        Log("Error: " & StdErr)
    End If

le_toubib · Jul 20, 2024

Daestrum said:

you could try something like

B4X:

    Dim shl As Shell
    Dim parms As List
    parms.Initialize
    parms.Add("-Xms1024m")
    parms.Add("-Xmx1024m")
    parms.Add("-jar")
    parms.Add("test.jar")
    shl.Initialize("shl","java.exe", parms)
    shl.WorkingDirectory="d:/"

    shl.Run(-1)
   
    Wait For shl_ProcessCompleted (Success As Boolean, ExitCode As Int, StdOut As String, StdErr As String)

    If Success Then
        Log("Success")
        Log(StdOut)
        Log(ExitCode)
    Else
        Log("Error: " & StdErr)
    End If

i tried the above fragment , i got the error below ,

java.lang.NoClassDefFoundError: b4j/example/main$ResumableSub_timer3_Tick
at b4j.example.main._timer3_tick(main.java:707)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:109)
at anywheresoftware.b4a.objects.Timer$TickTack$1.run(Timer.java:135)
at com.sun.javafx.application.PlatformImpl.lambda$null$173(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(Unknown Source)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: b4j.example.main$ResumableSub_timer3_Tick
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 14 more

Click to expand...

timer3 tick is where this fragment is executed . it used to run very well this way :
shl.Initialize("shl","java.exe", Array As String("-jar", "D:\test.jar"))
but problems arised when i added more arguments

aeric · Jul 20, 2024

Why use a timer?

aeric · Jul 20, 2024

le_toubib said:
added more arguments

test.jar also expecting arguments

le_toubib · Jul 20, 2024

aeric said:
Why use a timer?

Timer set the time to execute this code fragment. It's disabled before execution, there's no repeat.
No, test.Jar didn't use any arguments.

I meant java.Exe arguments , - jar worked fine, but adding -Xms1024m and -Xmx1024m caused the problem.

aeric · Jul 20, 2024

I tested no problem. It is better if you have attached an example.

B4J Question java.exe arguments in shell

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