@RestController
public class MessageController {

  MessageService messageService = new MessageService();

  //http://localhost:8084/SpringREST/api/messages
  @RequestMapping(
        value = "/api/messages",
        method = RequestMethod.GET,
        produces = MediaType.APPLICATION_JSON_VALUE)
  public ResponseEntity<Collection<Message>> getMessages() {

    Collection<Message> messages = messageService.getAllMessages();
    return new ResponseEntity<Collection<Message>>(messages, HttpStatus.OK);
  }

}