Setting user extensions when the Selenium Server has been started dynamically

I hope this helps someone someday, I needed to set user extension for a selenium test suite, dynamically in the code as i was starting the Selenium server via same.

public void startSeleniumServer(String port) {

rcc = new RemoteControlConfiguration();
rcc.setPort(Integer.parseInt(port));


try {
seleniumServer = new SeleniumServer(false, rcc);
seleniumServer.start();

} catch (Exception e) {
throw new IllegalStateException("Can't start selenium server", e);
}
}

public void stopSeleniumServer() {
if (seleniumServer != null) {
seleniumServer.stop();
}
}

i was setting the user extension file using the remoteControlConfiguration object

so i had typed:

rcc.setUserExtensions(new File({path_location_to_user_extension.js}));

This didnt work and an extensive search in the api wasnt very useful.
A colleague however found out that doing a

seleniumServer.boot(); would make the user-extension file to work.

Great isn't it ...........