스프링에 AOP(Aspect Oriented Programming) 설정을 통해서 로그인 세션을 처리해 보는 로직을 구현해 보고자 한다

AOP(Aspect Oriented Programming)는 스프링에서 Interceptor와 비슷한 기능을 가진 기능이다

Interceptor는 서블릿 기반으로써 서블릿 실행 전, 실행 후 등으로 그때마다 어떤일을 할지에 대해서 정할 수 있다 

그리고 주소(url)로만 대상을 지정할 수 있다

그에 반해 AOP(Aspect Oriented Programming)는 메소드 기반으로써 메소드 이전, 메소드 이후 등으로 그때마다 어떤일을 할지에 대해서 정할 수 있다.

그리고 주소(url) 뿐만 아니라 파리미터, 어느테이션 등 다양한 방법으로 대상을 지정할 수 있다.

AOP(Aspect Oriented Programming) 구성요소

-어드바이스(advice)

-포인트컷(point cut)

-조인 포인트(join point)

어드바이스(advice)

작업에 대해서 언제 그 작업을 수행해야 하는지 정의를 해준다

-before : 메소드 호출되기 전에

-after : 메소드 호출되고 난 후

-after-returning : 메소드가 성공적으로 완료된 후

-ater-throwing : 메소드가 예외를 던진 후

포인트 컷

어떤 클래스의 어느 조인포인트를 사용할 것 인지 정의를 해준다

조인포인트

작업에 대해서 동작할 수 있는 실행 가능한 특정위치

AOP(Aspect Oriented Programming) 필요라이브러리

-asm-3.3.1.jar

-aspectjweaver-1.6.11.jar

-cglib-2.2.jar

-aopalliance-1.0.jar

AOP(Aspect Oriented Programming) 스프링 설정(xml파일)

<beans xmlns:aop="http://www.springframework.org/schema/aop"

xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

<aop:aspectj-autoproxy />

<bean id="LoginAspect" class="com.my.app.main.aspect.LoginAspect">

</bean>

AOP(Aspect Oriented Programming) 클래스(java파일)

@Aspect

public class LoginAspect{

@Pointcut("execution(public * com.my.app.main.controller.*Controller.*(..))")

private void test(){}

@Around(value="test()")

public Object trace(ProceddingJoinPoint joinPoint) throws Throwable{

HttpServletRequest request= null;

for(Object o:joinPoint.getArgs()){

if(o instanceof HttpServletRequest){

request = (HttpServletRequest) o;

}

}

//로그인을 체크해야 하는 페이지

if(reqeust!= null){

String strUrl = request.getRequestURL().toString();

//로그인 페이지 제외

if(!strUrl.endsWith("/login")){

//세션체킹

HttpSession session = request.getSession();

String loginId = (String) session.getAttribut("LoginId");

if(loginId == null || "".equals(loginId)){

return "로그인페이지";

}

}

}//request가 null이 아니라면

//controller에서 httprequest가 없거나 /login페이지라면

Object result = joinPoint.proceed();

return result;

}

}

AOP(Aspect Oriented Programming) 또 다른 방식의 스플링 설정(xml파일)

<bean id="guide" class="com.my.aspect"></bean>

<aop:config>

<aop:aspect id="guideAspect" ref="guide">

<!-- 실행하게될 범위를 설정한다-->

<aop:pointcut expression="execution(public * com.my.do..*(..))" id="publicMethod" />

<!-- 실행되는 모든 시점-->

<aop:around method="guide" pointcut-ref="publicMethod" />

</aop:aspect>

</aop:config>

<!-- execution 예제들 -->

<!--리턴타입 void 메소드 이름이 set으로 시작하고 파라미터가 0개 이상인 메소드-->

<aop:pointcut expression="execution(public void set*(..))" />

<!--com.my.test패키지의 파라미터가 없는 모든 메소드 호출-->

<aop:pointcut expression="execution(* com.my.test.*.*())" />

<!--com.my.test 패키지 또는 하위의 패키지에 있는 파라미터가 0개 이상인 메소드-->

<aop:pointcut expression="execution(* com.my.test..*.*(..))" />

<!--리턴타입이 String인 kkk인터페이스의 getSomething()메소드 호출-->

<aop:pointcut expression="execution(String com.my.test.kkk.getSomething())" />

<!--이름이 get으로 시작하고 1개의 파라미터를 갖는 메소드 호출-->

<aop:pointcut expression="execution(* get*(*))" />

<!--이름이 get으로 시작하고 2개의 파라미터를 갖는 메소드 호출-->

<aop:pointcut expression="execution(* get*(*,*))" />

<!--이름이 read로 시작하고, 첫번째 파라미터 타입이 Integer이며, 1개이상의 파라미터를 갖는 메소드 호출-->

<aop:pointcut expression="execution(* read(Integer,..))"  />

web.xml(파일위치 :WEB-INF/web.xml)

서블릿 배포 기술자이며 WAS가 최초 구동될 때, WEB-INF 디렉토리에 존재하는 web.xml을 읽고 웹 어플리케이션을 설정한다

여기에는 spring_servlet_context.xml의 위치도 넣어주게 되어있다

기본 구조(3.1버젼)

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns: xsi="http://www.w3.org/2001/XMLSchema-instance"

 xmlns="http://xmlns.jcp.org/xml/ns/javaee"

 xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee 

 http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">

여러가지 설정들

</web-app>

기본 구조(2.5버젼)

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns="http://java.sun.com/xml/ns/javaee" 

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"

version="2.5">

여러가지 설정들

</web-app>

여러가지 설정들 리스트

1) 필터

<filter>

<filter-name>CharacterEncodingFilter</filter-name>

<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>

<init-param>

<param-name>encoding</param-name>

<param-value>UTF-8</param-value>

</init-param>

<init-param>

<param-name>forceEncoding</param-name>

<param-value>true</param-value>

</init-param>

</filter>

<filter-mapping>

<filter-name>CharacterEncodingFilter</filter-name>

<url-pattern>/*</url-pattern>

</filter-mapping>

<filter>

<filter-name>encodingFilter</filter-name>

<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>

<init-param>

<param-name>encoding</param-name>

<param-value>utf-8</param-value>

</init-param>

</filter>

<filter-mapping>

<filter-name>encodingFilter</filter-name>

<url-pattern>*.do</url-pattern>

</filter-mapping>

<filter>

<filter-name>encodingFilter</filter-name>

<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>

<init-param>

<param-name>encoding</param-name>

<param-value>UTF-8</param-value>

</init-param>

<init-param>

<param-name>forceEncoding</param-name>

<param-value>true</param-value>

</init-param>

</filter>

<filter-mapping>

<filter-name>encodingFilter</filter-name>

<url-pattern>/tudu/*</url-pattern>

</filter-mapping>

2) dispatcher 서블릿

dispatcher_servlet.xml

스프링에서 URL요청에 의해 contoller를 호출하게 되는게 그때 이 설정을 이용하여 controller가 동작하게 되고 결과에 대한 view페이지로 이동하게 됨

web.xml에서 2) dispatcher 서블릿에서 설정한 파일이다

기본구조

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns:context="http://www.springframework.org/schema/context"

    xmlns:p="http://www.springframework.org/schema/p"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xmlns="http://www.springframework.org/schema/beans"

    xmlns:mvc="http://www.springframework.org/schema/mvc"

    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd

       http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">

여러가지 설정들...

</beans>

1)component-scan

<context:component-scan base-package="sms"></context:component-scan>

<context:component-scan base-package="controller,dao,logic" />

<context:component-scan base-package="tudu.web.mvc, tudu.web.rest"/>

2)interceptor

<mvc:interceptors>

<mvc:interceptor>

<mvc:mapping path="/**"/>

<bean id="loggerInterceptor" class="sms.common.logger.LoggerInterceptor"></bean>

</mvc:interceptor>

</mvc:interceptors>

<bean id="localeChangeInterceptor"

          class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">

        <property name="paramName" value="lang"/>

 </bean>

3)annotation-driven

<mvc:annotation-driven />

4)view resolver 관련

<bean

class="org.springframework.web.servlet.view.UrlBasedViewResolver" 

p:order="1" 

p:viewClass="org.springframework.web.servlet.view.JstlView" 

p:prefix="/WEB-INF/jsp/" 

p:suffix=".jsp">

</bean>

<!-- ViewResolver -->

<bean id="internalResourceViewResolver"

class="org.springframework.web.servlet.view.InternalResourceViewResolver">

<property name="viewClass">

<value>org.springframework.web.servlet.view.JstlView</value>

</property>

<property name="prefix">

<value>/WEB-INF/jsp/</value>

</property>

<property name="suffix">

<value>.jsp</value>

</property>

</bean>

<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">

  <property name="mediaTypes">

            <map>

                <entry key="html" value="text/html"/>

                <entry key="json" value="application/json"/>

            </map>

        </property>

        <property name="viewResolvers">

            <list>

                <bean class="org.springframework.web.servlet.view.UrlBasedViewResolver">

                    <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>

                    <property name="prefix" value="/WEB-INF/views/"/>

                    <property name="suffix" value=".jsp"/>

                </bean>

            </list>

        </property>

        <property name="defaultViews">

            <list>

                <bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView"/>

            </list>

        </property>

</bean>

<bean id="localeResolver"

          class="org.springframework.web.servlet.i18n.CookieLocaleResolver"/>

5) multipark resolver 관련

<bean id="multipartResolver"

class="org.springframework.web.multipart.commons.CommonsMultipartResolver"

p:maxUploadSize="104857600" 

p:maxInMemorySize="10485760">

</bean>

<bean id="multipartResolver"

          class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/>

6)기타 bean 관련

<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>

<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>

<!-- <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/> -->

<bean class="org.springframework.web.servlet.view.BeanNameViewResolver" p:order="0" />

<bean id="jsonView" class="org.springframework.web.servlet.view.json.MappingJacksonJsonView" />    

<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping" />

<bean class="org.springframework.jdbc.support.lob.DefaultLobHandler"></bean>

<bean id="handlerMapping"

          class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">

        <property name="interceptors">

            <list>

                <ref bean="localeChangeInterceptor"/>

            </list>

        </property>

</bean>

<bean id="menu" class="net.sf.navigator.menu.MenuLoader">

        <property name="menuConfig" value="/WEB-INF/menu-config.xml"/>

</bean>

7) view-controller

<mvc:view-controller path="/login.html" view-name="masterLogin" />

<mvc:view-controller path="/logout.html" view-name="logout" />

context.xml

주로 데이터베이스와 관련된 설정들이 이곳에 들어가게 된다

web.xml에서 4) context 관련과 5) 기타 context 관련에서 설정한 파일이다

기본 구조

<?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:context="http://www.springframework.org/schema/context"

xmlns:p="http://www.springframework.org/schema/p"

xmlns:tx="http://www.springframework.org/schema/tx"

xmlns:aop="http://www.springframework.org/schema/aop"

xsi:schemaLocation="http://www.springframework.org/schema/beans 

http://www.springframework.org/schema/beans/spring-beans.xsd

http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

http://www.springframework.org/schema/context 

http://www.springframework.org/schema/context/spring-context.xsd

http://www.springframework.org/schema/aop

http://www.springframework.org/schema/aop/spring-aop-3.0.xsd

http://www.springframework.org/schema/tx

http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">

여러가지 설정들...

</beans>

1) datasource

<!-- MySQL 설정 -->

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">

        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>

        <property name="url" value="jdbc:mysql://211.110.61.59/lguplus"/>

        <property name="username" value="paymint"/>

        <property name="password" value="paymint"/>

    </bean>

    <!-- 오라클 설정 -->

    <!-- <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">

        <property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"/>

        <property name="url" value="jdbc:oracle:thin:@localhost:1521:XE"/>

        <property name="username" value="아이디"/>

        <property name="password" value="비밀번호"/>

    </bean> -->

<!-- Data Source -->

<bean id="dataSource"

class="org.springframework.jdbc.datasource.DriverManagerDataSource">

<!-- JDBC드라이버명 설정 -->

<property name="driverClassName">

<value>com.mysql.jdbc.Driver</value>

</property>

<!-- JDBC접속 문자열 설정 -->

<property name="url">

<value>jdbc:mysql://localhost/spring?useUnicode=true&amp;characterEncoding=utf8

</value>

</property>

<!-- MySQL 유저ID 설정 -->

<property name="username">

<value>springuser</value>

</property>

<!-- MySQL 패스워드 설정 -->

<property name="password">

<value>springpassword</value>

</property>

</bean>

<bean id="dataSource"

          class="com.mchange.v2.c3p0.ComboPooledDataSource"

          destroy-method="close">

        <property name="driverClass" value="${datasource.driverclassname}"/>

        <property name="jdbcUrl" value="${dataSource.url}"/>

        <property name="user" value="${dataSource.username}"/>

        <property name="password" value="${dataSource.password}"/>

        <property name="initialPoolSize" value="10"/>

        <property name="minPoolSize" value="10"/>

        <property name="maxPoolSize" value="${dataSource.maxActive}"/>

        <property name="idleConnectionTestPeriod" value="600"/>

        <property name="acquireIncrement" value="2"/>

        <property name="maxStatements" value="300"/>

        <property name="numHelperThreads" value="10"/>

    </bean>

2) transaction

<bean id="transactionManager"

class="org.springframework.jdbc.datasource.DataSourceTransactionManager"

p:dataSource-ref="dataSource">

</bean>

<bean id="transactionManager"

          class="org.springframework.orm.jpa.JpaTransactionManager">

        <property name="entityManagerFactory" ref="entityManagerFactory"/>

</bean>

3) sql session

<bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">

<property name="dataSource" ref="dataSource" />

<property name="mapperLocations" value="classpath:/mapper/**/*_SQL.xml" />

</bean>

<bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">

        <constructor-arg index="0" ref="sqlSession"/>

4) message source

<!-- MessageSource -->

<bean id="messageSource"

class="org.springframework.context.support.ResourceBundleMessageSource">

<property name="basenames">

<list>

<value>ApplicationResource</value>

<value>messages</value>

</list>

</property>

</bean>

<bean id="messageSource"

          class="org.springframework.context.support.ReloadableResourceBundleMessageSource">

        <property name="basename" value="WEB-INF/messages"/>

</bean>