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I am experienced with Spring MVC and am trying out Stripes to decide whether to try it out for a new project.
In Spring MVC I would prepare model data and pass it to the view by adding it to a map in the ModelAndView instance created by my controller. I am having trouble finding the equivalent of this for Stripes.
It seems like the closest parallel is to have an ActionBean prepare my model data and add it to the HttpSession. A ForwardRedirect is used to load the view and the data is accessed from the session.
Is there better support for a front controller provided by Stripes, or is this a totally different design principle than Spring MVC? (ie I have to invoke methods from the view using EL to retrieve data, as some of the examples do)
Thanks!
374
A typical MVC design in Stripes would look like something like the code below.
The JPA entity is automaticaly loaded by a Stripes interceptor provided by Stripersist (but this can also easily implemented on your own if you wish). Thus in this example, requesting http://your.app/show-order-12.html will load a order with id 12 from the database and will show it on the page.
Controller (OrderAction.java):
@UrlBinding("/show-order-{order=}.html")
public class OrderAction implements ActionBean {
private ActionBeanContext context;
private Order order;
public ActionBeanContext getContext() {
return context;
}
public void setContext(ActionBeanContext context) {
this.context = context;
}
public void setOrder(Order order) {
this.order = order;
}
public String getOrder() {
return order;
}
@DefaultHandler
public Resolution view() {
return new ForwardResolution(“/WEB-INF/jsp/order.jsp”);
}
}
View (order.jsp):
<html><body>
Order id: ${actionBean.order.id}<br/>
Order name: ${actionBean.order.name)<br/>
Order total: ${actionBean.order.total)<br/>
</body></html>
Model (Order.java):
@Entity
public class Order implements Serializable {
@Id @GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
private String name;
private Integer total;
public String getName() {
return name;
}
public Integer getTotal() {
return total;
}
}
BTW there is an really excellent short(!) book on Stripes that covers all these things:
Stripes: ...and Java Web Development Is Fun Again
79
Okay I have figured it out. Attributes added to the HttpServletRequest (retrieved from context) ARE available in the page receiving the ForwardRedirect
IE context.getRequest().setAttribute("attr1", "request attribute 1"); return new ForwardResolution("/WEB-INF/pages/hello.jsp");
In hello.jsp ${attr1} is available... yay!
38
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