MessageBoardResourceBean.java

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package com.sun.jersey.samples.jersey_ejb.resources;

import com.sun.jersey.samples.jersey_ejb.entities.Message;
import com.sun.jersey.samples.jersey_ejb.exceptions.NotFoundException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.List;
import javax.ejb.EJB;
import javax.ejb.Stateless;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriInfo;

/**
 *
 * @author pavel.bucek@sun.com
 */
@Stateless
public class MessageBoardResourceBean {

    @Context private UriInfo ui;
    @EJB MessageHolderSingletonBean singleton;

    @GET
    public List<Message> getMessages() {
        return singleton.getMessages();
    }

    @POST
    public Response addMessage(String msg) throws URISyntaxException {
        Message m = singleton.addMessage(msg);

        URI msgURI = ui.getRequestUriBuilder().path(Integer.toString(m.getUniqueId())).build();

        return Response.created(msgURI).build();
    }

    @Path("{msgNum}")
    @GET
    public Message getMessage(@PathParam("msgNum") int msgNum) {
        Message m = singleton.getMessage(msgNum);

        if(m == null) {
            // This exception will be passed through to the JAX-RS runtime
            // No other runtime exception will behave this way unless the
            // exception is annotated with javax.ejb.ApplicationException
            throw new WebApplicationException(Response.Status.NOT_FOUND);
        }

        return m;

    }

    @Path("{msgNum}")
    @DELETE
    public void deleteMessage(@PathParam("msgNum") int msgNum) throws NotFoundException {
        boolean deleted = singleton.deleteMessage(msgNum);

        if(!deleted) {
            // This exception will be mapped to a 404 response
            throw new NotFoundException();
        }
    }
}