OrderControllerV4.java

//...

private String orderId = "";

@GetMapping
public String orderPage(Model model){
    model.addAttribute("orderId",orderId);
    return "order";
}

@GetMapping("/capture")
public String captureOrder(@RequestParam String token){
    //FIXME(Never Do this either put it in proper scope or in DB)
    orderId = token;
    paymentService.captureOrder(token);
    return "redirect:/orders";
}

//...