code: protected Object handleException(Exception ex, Method method, Object[] params) throws Exception {
          throw ex;
      }
docs: Called by interceptor in case of invocation exception.
  <p/>
  Default implementation just rethrows the exception.
  
  @param ex     Caught exception instance.
  @param method Invoked method.
  @param params Invoked method params.
  @return Method can return something on behalf of invoked method.
  @throws Exception