public void init(ServletConfig config) {
if(config.getServletContext().getAttribute(RackApplicationFactory.RACK_CONTEXT) == null){
System.out.println("setup rails application via jruby-rack - started . . .");
ServletContext ctx = config.getServletContext();
ServletRackConfig rackConfig = new RestyServletRackConfig(ctx);
final RackApplicationFactory fac = new SharedRackApplicationFactory(new RailsRackApplicationFactory());
ctx.setAttribute(RackApplicationFactory.FACTORY, fac);
ServletRackContext rackContext = new ServletRackContext(rackConfig);
ctx.setAttribute(RackApplicationFactory.RACK_CONTEXT, rackContext);
try {
fac.init(rackContext);