URI Rest with Httpservlet

Question

So, guys, I’m developing a mini framework for study purposes, using the Java front controller, and I came across the following problem.

First of all I’ll explain how it’s working.

I embed the Jetty server inside the framework, when I open my application (using the mini-framework) it will scan the classes of my project check if there are two annotations that I created in my classes that are @Rest (defines the class as a controller) and @Get (maps the request) and plays in a hashMap with the mapping as key and the controller class as value.

@Rest
public class UserController {

    @Get("/books")
    public String getBook() {
        Book book = new Book();
        book.setAuthor("NetoDevel");
        book.setTitle("RileyFramework");
        book.setPrice(0.0d);
        return JsonReturn.toJson(book);
    }

    @Get("/book/:id")
    public String findOne(String id) {
        return id;
    }
}

When I receive the request, I play it in the key of my map and I take the value that is the controller class and I invoke the beauty method?

So far everything works perfectly, but I want to set parameters in my URI, in REST architecture.

Format I want to implement:

http://localhost:8080/books/:id

and not

http://localhost:8080/books?id=1

My question is: How to get there in my Serrvlet that is implemented the value of :id ?

I can have more than one stop in this format below:

http://localhost:8080/books/:id/author/:id

Follow the project link on github: https://github.com/NetoDevel/riley-framework

Answer 1

Get the map with all parameters sent on request through the following code:

Map pathVariables = (Map) request.getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);