Java EE 6, JAX-RS as EJB beans

[Sergei Zhylinski]

Hi to everyone,

I downloaded Enthuware trial tests. One of tasks was to choose a correct JAX-RS resources implementation by EJB component. The right answers were:

@Path("rs")
// @Stateless
@Singleton
public class AdditionService extends Application {
     
     @GET
     @Path("/add/{num}/{num}")
     public String addlist(@PathParam("num") List<Integer> numbers) {       ...    }

}

But I can't create such a resource by myself. The beans are deployed and registered on containers successfully but when I try to access them through a client (browser) I am always getting 404 error.

Is this sample is a correct EJB implementation? Must the bean be packaged is a ejb or war module, what are the other ways to create JAX-RS root resources as EJB 3.1 beans?

[Frits Walraven]

Hi!

You have to use a "Dynamic Web Project" in Eclipse, so the bean is packaged in a war. Furthermore make sure you have an EE6-server (and not EE7 because you will have a different version of JAX-RS).

I have used Glassfish 3.1.2 as it includes Jersey (and you should know about Jersey on the exam).

This code example runs without problems:

import java.util.HashSet;
import java.util.Set;

import javax.ejb.Singleton;
import javax.ws.rs.ApplicationPath;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.core.Application;

@ApplicationPath("jax")
@Path("rs")
@Singleton
public class AdditionService extends Application {

	@GET
	@Path("/add/{num1}/{num2}")
	public String add(@PathParam("num1") int num, @PathParam("num2") int num2) {
		return "" + (num + num2);
	}

	@Override
	public Set<Class<?>> getClasses() {
		Set<Class<?>> s = new HashSet<Class<?>>();
		s.add(AdditionService.class);
		return s;
	}
}

URL: http://localhost:8080/[insert name of dynamic web project]/jax/rs/add/1/3
Output:

4

By the way: you can better ask questions on the Enthuware forums ( http://enthuware.com/forum/viewforum.php?f=40 ) because I will receive an email instantly.

[Uwe Lindenberg]

Hi Frits,

thanks für the Enthuware test with the topic WebServices.

I got some questions concerning some answers.

Is it allowed to post it here? I would post some snippets from the test. My proxy (which is not changeable) does not allow discussing it at the Enthuware-forum.

Best regards and thanks in advance,


Uwe

[Frits Walraven]

Hi Uwe,

I prefer to keep the feedback in one place because that is easier for all the customers. They also read the discussions about certain questions.

Just send me a PM.

Regards,
Frits