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package org.glassfish.jersey.examples.jersey_ejb.resources;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.List;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.NotFoundException;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriInfo;
import javax.ejb.EJB;
import javax.ejb.Stateless;
import org.glassfish.jersey.examples.jersey_ejb.entities.Message;
import org.glassfish.jersey.examples.jersey_ejb.exceptions.CustomNotFoundException;
/**
* A stateless EJB bean to handle REST requests to the messages resource.
* Messages are stored in the injected EJB singleton instance.
*
* @author Pavel Bucek (pavel.bucek at oracle.com)
*/
@Stateless
public class MessageBoardResourceBean {
@Context
private UriInfo ui;
@EJB
MessageHolderSingletonBean singleton;
/**
* Returns a list of all messages stored in the internal message holder.
*/
@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 NotFoundException();
}
return m;
}
@Path("{msgNum}")
@DELETE
public void deleteMessage(@PathParam("msgNum") int msgNum) throws CustomNotFoundException {
boolean deleted = singleton.deleteMessage(msgNum);
if (!deleted) {
// This exception will be mapped to a 404 response
throw new CustomNotFoundException();
}
}
}