@Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler,
            Exception ex) {
        GraceContext.INSTANCE.getGraceShutDownManager().decreaseRequestCount();
    }
@Test
    public void afterCompletion() {
        interceptor.afterCompletion(request, response, new Object(), null);
        Assert.assertTrue(GraceContext.INSTANCE.getGraceShutDownManager().getRequestCount() < 0);
        GraceContext.INSTANCE.getGraceShutDownManager().increaseRequestCount();
    }