Class HomeController

ch3/HomeController.java:17–40

import javax.servlet.http.*;

@Controller
public class HomeController {
	@Autowired
	WebApplicationContext servletAC; // Servlet AC

	@RequestMapping(value = "/", method = RequestMethod.GET)
	public String home(Locale locale, HttpServletRequest request, Model model) {
		// 원래는 request.getServletContext()지만, 컨트롤러는 HttpServlet을 상속받지 않아서 아래와 같이 해야함.
		ServletContext sc = request.getSession().getServletContext(); // ApplicationContextFacade
		WebApplicationContext rootAC = WebApplicationContextUtils.getWebApplicationContext(sc); // Root AC

		System.out.println("webApplicationContext = " + rootAC);
		System.out.println("servletAC = " + servletAC);

		System.out.println("rootAC.getBeanDefinitionNames() = " + Arrays.toString(rootAC.getBeanDefinitionNames()));
		System.out.println("servletAC.getBeanDefinitionNames() = " + Arrays.toString(servletAC.getBeanDefinitionNames()));

		System.out.println("rootAC.getBeanDefinitionCount() = " + rootAC.getBeanDefinitionCount());
		System.out.println("servletAC.getBeanDefinitionCount() = " + servletAC.getBeanDefinitionCount());

		System.out.println("servletAC.getParent()==rootAC = " + (servletAC.getParent() == rootAC)); // servletAC.getParent()==rootAC = true
		return "home";
	}
}
/* [실행결과]
webApplicationContext = Root WebApplicationContext: startup date [Thu Jan 06 16:26:50 KST 2022]; root of context hierarchy
servletAC = WebApplicationContext for namespace 'appServlet-servlet': startup date [Thu Jan 06 16:26:51 KST 2022]; parent: Root WebApplicationContext