스프링3.0
Spring3.0 DI AOP
사라링
2012. 5. 14. 19:05
Spring 스프링을 간단히 말하면 엔터프라이즈 어플리케이션에서 필요로 하는 기능을 제공하느 프레임워크
* 경량 컨테이너 (EJB보다는 경량 하지만 struts같은것보단 무거움 대신기능은많음)
* 스프링은 트랜잭션 처리를 위한 일관된 방법을 제공한다.
* 스프링은 영속성과 관련된 다양한 API를 지원한다.
* 스프링은 다양한 API에 대한 연동을 지원한다.
단점
* EJB 보단 가볍고 쉽지만 다른것들에 비해서는 어렵고 무겁다.
* 경량 컨테이너 (EJB보다는 경량 하지만 struts같은것보단 무거움 대신기능은많음)
* DI (!중요 : 객체를 주입,넣어주는 역할, struts에서는 인터셉터설정해서 하던것을 설정만해주면 자동으로 넣어줌)
* AOP : 인터셉터보다 범위확장 (Struts2 인터셉터 => 액션의 동작의 전처리 후처리)
* POJO * AOP : 인터셉터보다 범위확장 (Struts2 인터셉터 => 액션의 동작의 전처리 후처리)
* 스프링은 트랜잭션 처리를 위한 일관된 방법을 제공한다.
* 스프링은 영속성과 관련된 다양한 API를 지원한다.
* 스프링은 다양한 API에 대한 연동을 지원한다.
단점
* EJB 보단 가볍고 쉽지만 다른것들에 비해서는 어렵고 무겁다.
자바프로젝트만들기
Dependency Injection (DI) : 면접볼때 물어볼수있을정도로 중요함.
설정만으로 객체를 주입시켜줌
==================================프로젝트======================================
예제.
madvirus.spring.chap01
Article (자바빈같은용도)
ArticleDao (인터페이스 insert메소드)
Main (applicationContext.xml)
MySQLArticleDao (ArticleDao 를 구현 insert메소드 구현)
WriteArticleService (인터페이스 write메소드)
WriteArticleServiceImpl (WriteArticleService를 구현한 write메소드 구현)
applicationContext.xml (DI(Dependency Injection) 처리 : 객체의 외부에서 두개의 의존성있는 객체의 관계를 형성)
==================================코드======================================
예제.
madvirus.spring.chap01
Article (자바빈같은용도)
package madvirus.spring.chap01;
public class Article {
}
public class Article {
}
ArticleDao (인터페이스 insert메소드)
package madvirus.spring.chap01;
public interface ArticleDao {
void insert(Article article);
}
public interface ArticleDao {
void insert(Article article);
}
Main (applicationContext.xml)
package madvirus.spring.chap01;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
public class Main {
public static void main(String[] args){
Resource resource =new ClassPathResource("applicationContext.xml");
BeanFactory beanFactory = new XmlBeanFactory(resource);
WriteArticleService articleService = (WriteArticleService)beanFactory.getBean("writeArticleService");
articleService.write(new Article());
}
}
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
public class Main {
public static void main(String[] args){
Resource resource =new ClassPathResource("applicationContext.xml");
BeanFactory beanFactory = new XmlBeanFactory(resource);
WriteArticleService articleService = (WriteArticleService)beanFactory.getBean("writeArticleService");
articleService.write(new Article());
}
}
MySQLArticleDao (ArticleDao 를 구현 insert메소드 구현)
package madvirus.spring.chap01;
public class MySQLArticleDao implements ArticleDao{
@Override
public void insert(Article article){
System.out.println("MySQLArticleDao.insert()실행");
}
}
public class MySQLArticleDao implements ArticleDao{
@Override
public void insert(Article article){
System.out.println("MySQLArticleDao.insert()실행");
}
}
WriteArticleService (인터페이스 write메소드)
package madvirus.spring.chap01;
public interface WriteArticleService {
void write(Article article);
}
public interface WriteArticleService {
void write(Article article);
}
WriteArticleServiceImpl (WriteArticleService를 구현한 write메소드 구현)
package madvirus.spring.chap01;
public class WriteArticleServiceImpl implements WriteArticleService{
private ArticleDao articleDao;
//생성자
public WriteArticleServiceImpl(ArticleDao articleDao){
this.articleDao = articleDao;
}
@Override
public void write(Article article) {
System.out.println("WriteArticleServiceImpl.write() 메서드 실행");
articleDao.insert(article);
}
}
public class WriteArticleServiceImpl implements WriteArticleService{
private ArticleDao articleDao;
//생성자
public WriteArticleServiceImpl(ArticleDao articleDao){
this.articleDao = articleDao;
}
@Override
public void write(Article article) {
System.out.println("WriteArticleServiceImpl.write() 메서드 실행");
articleDao.insert(article);
}
}
applicationContext.xml (DI(Dependency Injection) 처리 : 객체의 외부에서 두개의 의존성있는 객체의 관계를 형성)
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<!-- DI(Dependency Injection) 처리 -->
<!-- 객체의 외부에서 두개의 의존성있는 객체의 관계를 형성 -->
<bean name="writeArticleService" class="madvirus.spring.chap01.WriteArticleServiceImpl">
<!-- 생성자에 객체 전달 -->
<constructor-arg>
<!-- 생성자가 class="madvirus.spring.chap01.MySQLArticleDao" 를 받을수 있도록 등록 -->
<ref bean="articleDao"/>
</constructor-arg>
</bean>
<bean name="articleDao" class="madvirus.spring.chap01.MySQLArticleDao"/>
</beans>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<!-- DI(Dependency Injection) 처리 -->
<!-- 객체의 외부에서 두개의 의존성있는 객체의 관계를 형성 -->
<bean name="writeArticleService" class="madvirus.spring.chap01.WriteArticleServiceImpl">
<!-- 생성자에 객체 전달 -->
<constructor-arg>
<!-- 생성자가 class="madvirus.spring.chap01.MySQLArticleDao" 를 받을수 있도록 등록 -->
<ref bean="articleDao"/>
</constructor-arg>
</bean>
<bean name="articleDao" class="madvirus.spring.chap01.MySQLArticleDao"/>
</beans>
==================================결과값======================================
AOP : struts의 인터셉터보다 규모가 커졌다. 적용범위가 넓다.
여러부분에 걸쳐서 공통으로 사용되는 기능이 필요한 경우가 있다.
예를들어 로깅, 트랙잭션처리, 보안과 같은 기능을 처리
proxy : 대리객체 LogginAspect를 호출해줌
================================프로젝트====================================
예제.
madvirus.spring.chap01
LoggingAspect (공통관심사항 실제처리할부분)
MainForAop (실행할부분)
commonConcern.xml (공통관시사항 설정,적용)
==================================코드======================================
예제.
madvirus.spring.chap01
LoggingAspect (공통관심사항 실제처리할부분)
package madvirus.spring.chap01;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.aspectj.lang.ProceedingJoinPoint;
import org.springframework.util.StopWatch;
public class LoggingAspect {
private Log log = LogFactory.getLog(getClass());
public Object logging (ProceedingJoinPoint joinPoint) throws Throwable{
log.info("기록시작");
StopWatch stopWatch = new StopWatch();
try{
stopWatch.start();
Object retValue = joinPoint.proceed();
return retValue;
}catch(Throwable e) {
throw e;
}finally{
stopWatch.stop();
log.info("기록종료");
log.info(joinPoint.getSignature().getName() + "매서드 실행시간 : " + stopWatch.getTotalTimeMillis());
}
}
}
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.aspectj.lang.ProceedingJoinPoint;
import org.springframework.util.StopWatch;
public class LoggingAspect {
private Log log = LogFactory.getLog(getClass());
public Object logging (ProceedingJoinPoint joinPoint) throws Throwable{
log.info("기록시작");
StopWatch stopWatch = new StopWatch();
try{
stopWatch.start();
Object retValue = joinPoint.proceed();
return retValue;
}catch(Throwable e) {
throw e;
}finally{
stopWatch.stop();
log.info("기록종료");
log.info(joinPoint.getSignature().getName() + "매서드 실행시간 : " + stopWatch.getTotalTimeMillis());
}
}
}
MainForAop (실행할부분)
package madvirus.spring.chap01;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class MainForAop {
public static void main(String[] args){
String[] configLocations = new String[] {"applicationContext.xml","commonConcern.xml"};
ApplicationContext context = new ClassPathXmlApplicationContext(configLocations);
WriteArticleService articleService = (WriteArticleService) context.getBean("writeArticleService");
articleService.write(new Article());
}
}
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class MainForAop {
public static void main(String[] args){
String[] configLocations = new String[] {"applicationContext.xml","commonConcern.xml"};
ApplicationContext context = new ClassPathXmlApplicationContext(configLocations);
WriteArticleService articleService = (WriteArticleService) context.getBean("writeArticleService");
articleService.write(new Article());
}
}
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<!-- DI(Dependency Injection) 처리 -->
<!-- 객체의 외부에서 두개의 의존성있는 객체의 관계를 형성 -->
<bean name="writeArticleService" class="madvirus.spring.chap01.WriteArticleServiceImpl">
<!-- 생성자에 객체 전달 -->
<constructor-arg>
<!-- 생성자가 class="madvirus.spring.chap01.MySQLArticleDao" 를 받을수 있도록 등록 -->
<ref bean="articleDao"/>
</constructor-arg>
</bean>
<bean name="articleDao" class="madvirus.spring.chap01.MySQLArticleDao"/>
</beans>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<!-- DI(Dependency Injection) 처리 -->
<!-- 객체의 외부에서 두개의 의존성있는 객체의 관계를 형성 -->
<bean name="writeArticleService" class="madvirus.spring.chap01.WriteArticleServiceImpl">
<!-- 생성자에 객체 전달 -->
<constructor-arg>
<!-- 생성자가 class="madvirus.spring.chap01.MySQLArticleDao" 를 받을수 있도록 등록 -->
<ref bean="articleDao"/>
</constructor-arg>
</bean>
<bean name="articleDao" class="madvirus.spring.chap01.MySQLArticleDao"/>
</beans>
commonConcern.xml (공통관시사항 설정,적용)
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
<bean id="logging" class="madvirus.spring.chap01.LoggingAspect"/>
<aop:config>
<!-- 공통관시사항 설정 -->
<aop:pointcut id="servicePointcut" expression="execution(* *..*Service.*(..))"/>
<!-- 공통관심사항 실제적용 -->
<aop:aspect id="loggingAspect" ref="logging">
<aop:around pointcut-ref="servicePointcut" method="logging" />
</aop:aspect>
</aop:config>
</beans>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
<bean id="logging" class="madvirus.spring.chap01.LoggingAspect"/>
<aop:config>
<!-- 공통관시사항 설정 -->
<aop:pointcut id="servicePointcut" expression="execution(* *..*Service.*(..))"/>
<!-- 공통관심사항 실제적용 -->
<aop:aspect id="loggingAspect" ref="logging">
<aop:around pointcut-ref="servicePointcut" method="logging" />
</aop:aspect>
</aop:config>
</beans>
==================================결과값======================================
