Execute application from java

[Luca Verdi]

Hi folks,
I'm trying to run this simple code:

        Process p;
        try {
            String line = "luxconsole -V ~/Desktop/allmaterials_08.lxs";
            p = Runtime.getRuntime().exec(line, args, new File("/Applications/LuxRender/LuxRender.app/Contents/MacOS"));
            p.waitFor();
        } catch (Exception e) {
            e.printStackTrace();
        }

but I get this exception:

Java.io.IOException: Cannot run program "luxconsole" (in directory "/Applications/LuxRender/LuxRender.app/Contents/MacOS"): error=2, No such file or directory
	at java.lang.ProcessBuilder.start(ProcessBuilder.java:460)
	at java.lang.Runtime.exec(Runtime.java:593)
	at java.lang.Runtime.exec(Runtime.java:431)
	at executecommandtest.ExecuteCommandTest.main(ExecuteCommandTest.java:23)
Caused by: java.io.IOException: error=2, No such file or directory
	at java.lang.UNIXProcess.forkAndExec(Native Method)
	at java.lang.UNIXProcess.<init>(UNIXProcess.java:53)
	at java.lang.ProcessImpl.start(ProcessImpl.java:91)
	at java.lang.ProcessBuilder.start(ProcessBuilder.java:453)
	... 3 more

The path is correct; luxconsole application is there so I don't understand this exception.
what I wrong?

thank you

bye

[Rob Spoor]

Try ./luxconsole
In Linux and Mac, the current folder (.) is hardly ever part of the PATH variable. So unlike in Windows, you need to include the path.

[Luca Verdi]

It works!
Really thank you.

bye

[Rob Spoor]

You're welcome

[Luca Verdi]

Ok, ehm..another stuff like first post;

I need to execute an LSF submit job command always from my Java app.

The command is:

bsub < start_server

where start_server is a batch script containing BSUB directives.

my code si the following:

Process ss;

String[] cmd = {"bsub", "<", "start_server"};

for (int i = 0; i < 3; i++) {
   ss = Runtime.getRuntime().exec(cmd);
   ss.waitFor();
}

I do not get errors but I verified that command is not executed!
Can you help me?

Thank you.
bye

[Rob Spoor]

You can't use <, >, |, && or ||, as those are not part of the commands. They are operators in your shell. Either do the file redirection yourself (using ss' getOutputStream() method), or execute the command through a shell. I'm not sure how to do it, but most shells (like bash) has an option to have it run another command.

Also, please read Please When Runtime.exec() won't before continuing. It'll help you prevent problems like hanging processes.

[Luca Verdi]

ok thanks!

using "bash -c" and in particular:

Runtime.getRuntime().exec(new String[]{"bash","-c","bsub < start_server"});

works!

Thank you for the answer

bye