Re: [Wrapper-user] No GUI ?!?

[Leif M. <le...@ta...>]

I figured out how to allow Java to display a GUI while it is being run 
as a service.  :-D BUT!  It will also display a console window at the 
same time. :-(
I am currently creating the java process with the processflags: 
CREATE_NEW_PROCESS_GROUP
In this mode, all features of the Wrapper work correctly, but there is 
just that ugly console window to deal with.

If I change the processFlags to: CREATE_NEW_PROCESS_GROUP | 
DETACHED_PROCESS then the console window goes away.   In this mode I am 
still able to capture all output from the JVM for logging purposes.  The 
problem is that in this mode, It does not seem to be possible to 
intercept system signals.   This means that the Wrapper will kill the 
JVM if the user logs out.  Furthermore,  the Wrapper views this as if 
the user had hit CTRL-C so the Wrapper will also exit.   In addition 
some features, like invoking a Thread Dump from within the JVM also 
fail.  So this does not seem to be a valid option.

I will look into this some more, but it is all coming back to me from 
when I had looked into this about a year ago... :-(  If anyone knows how 
to intercept and generate system signals in a detached process, I would 
love to hear from you.

Cheers,
Leif

Leif Mortenson wrote:

> Kevin,
>    From the log, it looks like you are trying to run your application 
> as a Service.  The current version of the Wrapper does not allow the 
> Java process to access the desktop when running in that mode.  That is 
> why you can not see your GUI.
>    If you run in console mode, then you should be able to see the GUI 
> without any problems.
>
>    There is currently an open feature request to allow access to the 
> desktop when run as a service.  I have to figure out how to get it 
> working though :-)
>
>    Cheers,
>    Leif
>
> Kevin & Laura Schmidt wrote:
>
>> Hello all,
>>     I am attempting to use wrapper 2.2.9 on WIndows 2000, and I have 
>> everything working....except....The GUI of my swing app doesnt 
>> show!!!  I am using the WrapperSimpleApp method to call my main, 
>> which constructs my mainFrame, calls mainFrame.show();, and then does 
>> some other stuff on startup.  Well, I see the output of the other 
>> stuff, but the GUI never pops up, minimized or otherwise.  I turned 
>> debug level to DEBUG, but didnt get an errors.
>>     Help!!!!!!!!
>>     -Kevin
>>
>> ps. Wrapper is a great program after *struggling* with JavaService!!!
>>
>> Here is a copy of my wrapper.log with DEBUG on:
>>
>> STATUS | wrapper  | 2002/12/06 10:10:05 | --> Wrapper Started as Service
>>
>
>
>
>
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