CODEWITHSUNDEEP
model-view-controllerspringspring-roo
Timothy Jeffcoat
Timothy Jeffcoat

Reputation: 805

Spring Roo Petclinic menu.jspx and Controller. How does it work?

FYI. I did post this on the Spring Roo forum but no reply.

This is a very basic question from a newbie.

The question is concerning how the Controller knows to direct the menu link , such as the following from the petclinic example

<menu:item id="i_pet_new" messageCode="global_menu_new" url="/pets?form" z="SwmuMoL7UBbDU/gqHy+t5Tl0Ins="/>

My current understanding is that the 

@RequestMapping("/pets")

@Controller

 public class PetController {

}

Handles the url="/pet" portion but

How does the Controller know how to handle the remaining portion? The portion that says "?form" ?

I have done simple mvc projects before and I would have some code inside of the class PetController that would do something like:

@RequestMapping("/helloWorld")

public ModelAndView helloWorld() {

    ModelAndView mav = new ModelAndView();

    mav.setViewName("helloWorld");

    mav.addObject("message", "Hello World!");

    return mav;

}

In the current example there are no additional methods to handle the ModelAndView !

Thanks for the help.

Upvotes: 0

Views: 1548

Answers (1)

Raghuram
Raghuram

Reputation: 52665

You will notice the file PetController_Roo_Controller.aj created in the same folder as PetController.java. This contains the relevant code to handle this. Specifically, 

@RequestMapping(params = "form", method = RequestMethod.GET)
    public String PetController.createForm(Model model) {
        model.addAttribute("pet", new Pet());
        return "pets/create";
    }

Roo takes care of the CRUD operations for you.

Upvotes: 1

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