code: public boolean start(String home, File options)
     {
        File homeDirectory = new File(home);
        
        if (!homeDirectory.exists())
           return false;
  
        stop(home);
  
        try
        {
           List<String> command = new ArrayList<String>();
           command.add(java);
           command.add("-Dironjacamar.home=" + home);
  
           if (options != null && options.exists())
              command.add("-Dironjacamar.options=" + options.getAbsolutePath());
  
           command.add("-Djava.net.preferIPv4Stack=true");
           command.add("-Djgroups.bind_addr=127.0.0.1");
           command.add("-Dorg.jboss.logging.Logger.pluginClass=org.jboss.logging.logmanager.LoggerPluginImpl");
           command.add("-Dlog4j.defaultInitOverride=true");
           command.add("-jar");
           command.add(home + "/bin/ironjacamar-sjc.jar");
  
           ProcessBuilder pb = new ProcessBuilder(command);
           pb.redirectErrorStream(true);
  
           Map<String, String> environment = pb.environment();
           environment.put("ironjacamar.home", home);
  
           Process p = pb.start();
  
           instances.put(home, p);
  
           return true;
        }
        catch (Throwable t)
        {
           // Ignore
        }
  
        return false;
     }
docs: Start an instance
  @param home The home directory
  @param options The options
  @return True if started successfully; otherwise false