What is the best way to use Restful and CDI working together?

Question

I tried to build a project using CDI and Restful working together (Publish a Restful service from a CDI bean) but I couldn't find a way to do that.

Somebody know how they can work together without EJBs?.

Answer 1

With talking about Restful, I assume you mean Jax-RS. Take a the following code:

UserResource.java

This class implements the RESTful API accessing a use case GetUser and returning its result.

@Path("users")
@ApplicationScoped
public class UserResource {

    @Inject
    private GetUser getUser;

    @GET
    public Response getUser(@QueryParam("userId") String userId) {
        return UserRepresentationMapper.toRepresentation(getUser.getUser(userId);
    }
}

GetUser.java

The GetUser use case uses some dependencies (here a UserService) to get its data and do something with it.

@ApplicationScoped
public class GetUser {

    @Inject
    private UserService userService;

    public ApplicationUser getUser(String userId) {
        // ...
    }
}

and have a beans.xml within your META-INF (jar) or WEB-INF (war) directory to activate CDI (JEE6, beans.xml is not needed when using JEE7 and all your classes are annotated with bean defining annotations).