http://www.dropwizard.io/2.0.18/dropwizard-bom/dropwizard-dependencies/dropwizard-parent/dropwizard-jersey: Dropwizard is a Java framework for developing ops-friendly, high-performance, RESTful web applications.
  • Coda Hale
  • Nick Telford
  • Graham O'Regan
  • Ryan Kennedy
  • Camille Fournier
  • Carlo Barbara
  • Matt Veitas
  • Ryan Tenney
  • Jochen Schalanda
  • Glenn McAllister
  • Nick Babcock
  • Justin Plock
  • Artem Prigoda 
package io.dropwizard.jersey.optional;

import javax.ws.rs.core.Response;
import javax.ws.rs.ext.ExceptionMapper;
import java.util.Optional;


Since:2.0
/**
 * Returns a 204 for {@link Optional#empty()}
 * {@link EmptyOptionalExceptionMapper} returns a 404 for {@link Optional#empty()}
 *
 * @since 2.0
 */
public class EmptyOptionalNoContentExceptionMapper implements ExceptionMapper<EmptyOptionalException> {
    @Override
    public Response toResponse(EmptyOptionalException exception) {
        return Response.noContent().build();
    }
}