"hui zhang said"
>
> Zack Grafton wrote:
> > hui zhang wrote:
> >> Hi Everybody,
> >>
> >> Now I am trying to launch an external application, for example, "top"
> >> ,in my web application, and killing it by PID after a while. But when
> >> I execute Runtime.getRuntime.exec("top") in my JSP page or Servlet,
> >> Tomcat is stuck in that page and do not display anything because it
> >> can not stop running until that "commnad" is terminated, which means
> >> it waiting for the response from Runtime.getRuntime.exec("top"). It
> >> seems that it will run forever. Is there any solution to solve this
> >> problem? I mean that JSP page can execute the following code no
> >> matter if it finish the process is done.
> >>
> >> BTW, I do not use System.exit() in my program. It may cause Security
> >> Manager problem.
> >> Thanks and best regards,
> >>
> >> Hui
> >>
> > Hey,
> >
> > I'm new to the list and all, but you might want to try executing "top"
> > in batch mode. The command line option is -b on my gentoo linux box.
> > Also, be careful of executing commands from applets and such. Another
> > thing might be user permissions as well. You could try executing the
> > command and redirecting the output to a file and parsing the file
> > instead.
> >
> > Zack Grafton
Try 'top -n10 to do 10 interations and then exit. Top will run forever
otherwise. Limiting it with -n will allow it to exit.
HTH,
-Jeff
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