VirtualBox API - Start VM in Headless mode

/*
 * DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
 * Version 2, December 2004
 *
 * Everyone is permitted to copy and distribute verbatim or modified
 * copies of this license document, and changing it is allowed as long
 * as the name is changed.
 *
 * DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
 * TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
 *
 * 0. You just DO WHAT THE FUCK YOU WANT TO.
 */

import org.virtualbox_4_3.IMachine;
import org.virtualbox_4_3.IProgress;
import org.virtualbox_4_3.ISession;
import org.virtualbox_4_3.VirtualBoxManager;

/**
 * The following piece of code assume that
 * - WebServices server is running
 * - Authentication is disabled
 *
 * To disable authentication, run on the host before starting the server:
 *
 * vboxmanage setproperty websrvauthlibrary null
 *
 */
public class StartVM {

   public static void main(String[] args) {
      VirtualBoxManager vboxManager = VirtualBoxManager.createInstance(null);
      vboxManager.connect("http://localhost:18083", "", "");

      try {
         IMachine machine = vboxManager.getVBox().findMachine("machineName");
         ISession session = vboxManager.getSessionObject();
         IProgress p = machine.launchVMProcess(session, "headless", null);
         try {
            p.waitForCompletion(-1);
            if (p.getResultCode() != 0) {
               System.out.println("Machine failed to start: " + p.getErrorInfo().getText());
            }
         } finally {
            session.unlockMachine();
         }
      } finally {
         vboxManager.disconnect();
         vboxManager.cleanup();
      }
   }

}