Spring JDBC 6-4 Transaction 관리

Spring JDBC 6-4 Transaction 관리

Transaction Namespace 등록

Spring에서는 Transaction 처리를 AOP를 이용함.

AOP의 Advice 클래스처럼 작동됨

TransactionManager가 Advisor로 동작함

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

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

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

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

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

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

</beans>

DataSource 설정

<beans …>

<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="sa" />

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

</bean>

</beans>

TransactionManager 설정

<beans ...>

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"

destroy-method="close">

<!--... property 설정 ...-->

</bean>

<bean id="txManager"

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

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

</bean>

</beans>

Transaction 정책 설정

Transaction 정책을 설정하며 TransactionManager를 AOP의 Advice 클래스로 사용하기 위해 설정

<beans ...>

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">

<!--... property 설정 ...-->

</bean>

<bean id="txManager"

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

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

</bean>

<tx:advice id="txAdvice" transaction-manager="txManager">

<tx:attributes>

<tx:method name="get*" read-only="true"/>

<tx:method name="*"/>

</tx:attributes>

</tx:advice>

</beans>

AOP를 이용한 Trasaction의 적용

TransactionManager 객체를 Advice로 사용하는 AOP 설정을 추가

<beans ...>

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">

<!--... property 설정 ...-->

</bean>

<bean id="txManager"

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

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

</bean>

<tx:advice id="txAdvice" transaction-manager="txManager">

</tx:advice>

<aop:config>

<aop:pointcut id="txPointcut"

expression="execution(* com.multicampu.biz..*(..))"/>

<aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut"/>

</aop:config>

</beans>

프로그램에서의 TransactionManager 사용

AOP 설정으로 선언적 처리방법도 있지만 프로그램에서 직접 TransactionManager 를 이용하는 방법도 존재함.

TransactionTemplate Bean을 등록하고 이것을 비즈니스 객체에 Injection 시킴.

비즈니스 객체에서 주입된 TransactionTemplate 객체를 이용해 execute()메서드에 TransactionCallback 타입의 객체를 등록하고 doInTransaction() 추상 메서드를 overriding 함.

doInTransaction() 메서드 안에서 수행되는 구문이 정상 실행되면 자동 Commit, 실패하면 Rollback함.

<beans ...>

<bean id="txManager" class="org.springframework…">

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

</bean>

<bean id="transactionTemplate" class="org.springframework...">

<property name="transactionManager" ref="txManager" />

</bean>

<bean id="userService" class="com.multicampus.biz.user.UserServiceImpl">

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

</bean>

</beans>

TransactionManager를 사용하는 자바코드

public class UserServiceImpl implements UserService{

public Object creditTransfer() {

return transactionTemplate.execute(new TransactionCallback() {

public Object doInTransaction(TransactionStatus status) {

return transfer();

}

});

}

}