REST api custom mime types utilizing JaxRS MessageBodyReaderWriter Specifications

Demo project to handle REST requests with Multiple MIME Types like json & protobuf in the same API's.

Sample REST Resource:

@GET
@Path("/proto")
@Produces({MediaType.APPLICATION_JSON, MediaTypeExt.APPLICATION_X_PROTOBUF})
public Response testProto()

@POST
@Path("/proto")
@Consumes(MediaTypeExt.APPLICATION_X_PROTOBUF)
@Produces(MediaTypeExt.APPLICATION_X_PROTOBUF)
public Response createProto(PersonBinding.Person john)

Sample Protobuf MessageBodyWriter

@Provider
@Produces(MediaTypeExt.APPLICATION_X_PROTOBUF)
public class ProtoMessageWriter implements MessageBodyWriter<PersonBinding.Person> {
  private final static Logger logger = LoggerFactory.getLogger(ProtoMessageReader.class);

  @Override
  public boolean isWriteable(Class<?> aClass, Type type, Annotation[] annotations, MediaType mediaType) {
      return aClass == PersonBinding.Person.class;
  }

@Override
  public void writeTo(PersonBinding.Person person, Class<?> aClass, Type type, Annotation[] annotations, MediaType mediaType, MultivaluedMap<String, Object>      multivaluedMap, OutputStream outputStream) throws IOException, WebApplicationException {
      multivaluedMap.add(HttpHeaders.CONTENT_LENGTH,person.getSerializedSize());
      logger.info("Proto Response Size: {}",person.getSerializedSize());
      person.writeTo(outputStream);
  }
}