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From "John Sisson" <john.sis...@net-linx.com>
Subject RE: 'java' task does not exit
Date Mon, 03 Apr 2006 17:08:54 GMT
The spawn attribute runs my primary process without its console log
being visible; now you have to run (via ant) a tail program and attach
it to the process. I have done this but it is pretty inconvenient as
there is a family of 20 or more processes run by my extended NxJava
command each with its own property file of launch attributes. These are
deliverables at customer sites and the added complexity means it would
be easier to revert to os-specific launch scripts.
It might be better to execute the OpenOffice instance from within my
process via the os-command shell so that that spawns it or perhaps via
Ant from java which I have not yet tried, but now I will.

-----Original Message-----
From: Steve Loughran [mailto:stevel@apache.org] 
Sent: Sunday, April 02, 2006 1:08 PM
To: Ant Users List
Subject: Re: 'java' task does not exit

John Sisson wrote:
> Hello
> I have extended the ant 'org.apache.tools.ant.taskdefs.Java' task to
> setup many of the parameters from a property file using my class
> 'com.nxps.ant.tasking.JavaNx'; apart from the parameter management its
> action is pretty simple:

...

> It appears that Ant now just knows there is another process even
though
> it is completely independent and Ant cannot complete the task until
that
> process dies. This can be shown by killing OpenOffice explicitly,
> whereupon the Ant task completes.

clearly ant does not consider child processes to be independent. Indeed,

it could not do so and still route input and output properly, handle 
failures, or even block till the program finished.


> 
> So the question:
> Is this working as would be expected? Is there a way to launch a child
> process from within an application under control of Ant such that Ant
> will complete when the primary application terminates???
> 

I'd look at the spawn attribute


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