Implementing create with POST

[mariofaske]

Example 4.5 A Java servlet implementation for creating a coffee order

protected void doPost(HttpServletRequest request, HttpServletResponse response) {
  try {
    Order order = extractOrderFromRequest(request);
    if(order == null) {
      response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
    } else {
      String internalOrderId = saveOrder(order);
      response.setHeader(″Location″, computeLocationHeader(request, 
                         internalOrderId));
      response.setStatus(HttpServletResponse.SC_CREATED);
    } catch(Exception ex) {
        response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
    }
}

[mariofaske]

Implemented the example as accurately as possible