restservice - mvc controller and transactional ?

[Mike Winkelmann]

Hi guys,

is it possible to use a hibernate dao in the top layer - controller - of an restful webservice ?

So I want to do the following:

@Transactional
@Controller
public class TestController implements ITestController {

  @Autowired
  private final HibernateTestDAO dao;

  @Override
  @ResponseBody
  public JsonObject test(@RequestParam(required = true) final String testString)
  {
  }
}

So I want to open the transaction for hibernate directly in the spring mvc controller!
If I run the webservice and call the method an exception is thrown with "IllegalArgumentException: object is not an instance of declaring class".

Do someone knows something about this error ?

regards