Spring @PostConstruct / @PreDestroy 어노테이션과 라이프 사이클

[JSP/Spring] - Spring @Resource 어노테이션

이전 게시물과 연관 있습니다

실행 화면(Main05.java)

init 메소드 동작

close 메소드 동작

기존

ApplicationContext context = new ClassPathXmlApplicationContext(configLocations);
  

AbstractApplicationContext context = new ClassPathXmlApplicationContext(configLocations);



추가

context.registerShutdownHook();
작업이 끝난후 메모리 정리 

라이프 사이클을 만들 수 있지만
많이 사용하는 방법은 아님

applicationContext.xml

HomeController2.java

package madvirus.spring.chap04.homecontrol;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.annotation.Resource;

public class HomeController2 {

	private AlarmDevice alarmDevice;
	private Viewer viewer;

	@Resource(name = "camera1")
	private Camera camera1;

	@Resource(name = "camera2")
	private Camera camera2;

	@Resource(name = "camera3")
	private Camera camera3;

	private Camera camera4;

	
	
	public void setCamera1(Camera camera1) {
		this.camera1 = camera1;
	}
	public void setCamera2(Camera camera2) {
		this.camera2 = camera2;
	} 
	public void setCamera3(Camera camera3) {
		this.camera3 = camera3;
	}
	@Resource(name = "camera4")
	public void setCamera4(Camera camera4) {
		this.camera4 = camera4;
	}
	
	@PostConstruct
	public void init(){
		System.out.println("init 메소드 동작");
	}
	
	@PreDestroy
	public void close(){
		System.out.println("close 메소드 동작");
	}
}

Main05.java

package madvirus.spring.chap04.homecontrol;

import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Main05 {
	public static void main(String[] args) {
		String[] configLocations = new String[] { "applicationContext.xml" };
		AbstractApplicationContext context = new ClassPathXmlApplicationContext(
				configLocations);
		context.registerShutdownHook();

		HomeController2 home = context.getBean("homeController2",HomeController2.class);
	}
}