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Re: runtime.exec

Marc Epard wrote: 
on 10/5/04 9:05 AM, David Rocks wrote:

  
  I have run into more problems. When I try to run osascript through
runtime.exec in a java program it appears to go into la-la land. I see
no activity, and it also appears that the interface is hung. I am able
to trace the plugins call to the browser, but when  I use osascript it
appears to hang on the 1st call and all subsequent calls don't appear in
the trace, as if the plugin is hung and not processing any more
requests. Not the behavior using the open command or calling the browser
directly. There I can see trace records everytime I call the plugin. The
call statement looks OK in the trace. And I have no problem with
identical calls in the apple script editor or issuing the commands in
the terminal shell. Is there something different about the way osascript
is executed when called from within a program?
    

Could it be reading from stdin, which is where it gets the script if it
doesn't have a -e or a file?  You might try using Activity Monitor to Sample
osascript to see what it is doing.

-Marc
That's a good guess, especially if you are not using the String[] version of Runtime.exec.  I am using the following basic code just fine to call osascript:
 
       int result = -1;
       StringBuffer script = new StringBuffer();
        ... build script...
        String[] cmd = {"osascript", "-e", script.toString()};
        try {
            Process p = Runtime.getRuntime().exec(cmd);
            p.waitFor();
            result = p.getExitValue();
        } catch (Exception e) {
            e.printStackTrace();
        }

Note that if you need access to errors from the call to osascript, then you need to attach to the Process' error stream to get them (p.getErrorStream()).  See the Process javadoc for details.

Rob
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