IT실전교육,탑크리에듀교육센터: [Spring transaction, tx:manager.스프링3트랜잭션강좌/예제]@Transactional 어노테이션을 이용한 spring framework트랜잭션(Annotation설정방식),오라클자바커뮤니티 스프링프레임웥크교육학원추천!

2014년 7월 26일 토요일

[Spring transaction, tx:manager.스프링3트랜잭션강좌/예제]@Transactional 어노테이션을 이용한 spring framework트랜잭션(Annotation설정방식),오라클자바커뮤니티 스프링프레임웥크교육학원추천!

[Spring transaction, tx:manager.스프링3트랜잭션강좌/예제]@Transactional 어노테이션을 이용한 spring framework트랜잭션(Annotation설정방식),오라클자바커뮤니티 스프링프레임웥크교육학원추천!

[예제를 통해 이해하자.]

1. Spring Maven Project 생성 (springtr2 라는 이름으로)

전체 이클립스 프로젝트 구성은 다음과 같다.

:namespace prefix = v ns = "urn:schemas-microsoft-com:vml" />

<그림, 스프링 선언적트랜잭션예제 이클립스화면>

[pom.xml]

<groupId>org.springframework.samples</groupId>

<artifactId>springtr1</artifactId>

<version>0.0.1-SNAPSHOT</version>

<java.version>1.6</java.version>

<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

<spring-framework.version>3.2.3.RELEASE</spring-framework.version>

<logback.version>1.0.13</logback.version>

<slf4j.version>1.7.5</slf4j.version>

<junit.version>4.11</junit.version>

</properties>

<groupId>org.springframework</groupId>

<artifactId>spring-context</artifactId>

<version>${spring-framework.version}</version>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-tx</artifactId>

<version>${spring-framework.version}</version>

</dependency>

<version>${slf4j.version}</version>

<scope>compile</scope>

</dependency>

<groupId>ch.qos.logback</groupId>

<artifactId>logback-classic</artifactId>

<version>${logback.version}</version>

<scope>runtime</scope>

</dependency>

<groupId>junit</groupId>

<artifactId>junit</artifactId>

<version>${junit.version}</version>

</dependency>

<groupId>aspectj</groupId>

<artifactId>aspectjweaver</artifactId>

</dependency>

<groupId>commons-dbcp</groupId>

<artifactId>commons-dbcp</artifactId>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-jdbc</artifactId>

<version>3.2.3.RELEASE</version>

</dependency>

<groupId>com.oracle</groupId>

<artifactId>ojdbc6</artifactId>

</dependency>

</dependencies>

<id>oracle</id>

<name>ORACLE JDBC Repository</name>

<url>http://maven.jahia.org/maven2</url>

</repository>

</repositories>

</project>

2. Emp.java

package onj.edu.tr1.model;

public class Emp {

int empno;

String ename;

int deptno;

public Emp(int empno, String ename, int deptno) {

this.empno = empno;

this.ename = ename;

this.deptno = deptno;

}

public int getEmpno() {

return empno;

}

public void setEmpno(int empno) {

this.empno = empno;

}

public String getEname() {

return ename;

}

public void setEname(String ename) {

this.ename = ename;

}

public int getDeptno() {

return deptno;

}

public void setDeptno(int deptno) {

this.deptno = deptno;

}

3. OnjDao.java

package onj.edu.tr1.dao;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.util.List;

import javax.sql.DataSource;

import onj.edu.tr1.model.Emp;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.jdbc.core.JdbcTemplate;

import org.springframework.jdbc.core.RowMapper;

import org.springframework.stereotype.Repository;

import org.springframework.transaction.annotation.Transactional;

//JdbcDaoSupport클래스는 간단한 DataSource를 지원하기 위해 JdbcTemplate 클래스를 지원.

//jdbcTemplate은 DB연결, PrepatedStatement객체생성, 파라미터주입, SQL문장실행,

//DB접속종료등을 전담하며 getJdbcTemplate()을 통해 얻는다.

@Repository("onjDao")

public class OnjDao{

private JdbcTemplate jdbaTemplate;

@Autowired

public void setDataSource(DataSource dataSource){

this.jdbaTemplate = new JdbcTemplate(dataSource);

}

public List<Emp> getEmpByDeptno(int deptno) {

String sql = "select empno, ename, deptno from emp where deptno = ?";

List<Emp> list = jdbaTemplate.query(

sql,

new Object[] { deptno },

new RowMapper() {

public Object mapRow(ResultSet rs, int index) throws SQLException {

int empno = rs.getInt("empno");

String ename = rs.getString("ename");

int deptno = rs.getInt("deptno");

return new Emp(empno, ename, deptno);

}

);

return list;

}

@Transactional

public void insertEmps() throws Exception {

String sql = "insert into emp(empno, ename, deptno) values (?, ?, ?)";

jdbaTemplate.update(sql, new Object[] { 1771, "오자바1" , 10});

jdbaTemplate.update(sql, new Object[] { 1772, "오자바2", 10 });

jdbaTemplate.update(sql, new Object[] { 1773, "오자바3", 10 });

//같은 데이터를 넣으면 키값이 중복되어 DataAccessException 발생(런타임예외)

jdbaTemplate.update(sql, new Object[] { 1773, "오자바3", 10 });

//아래 주석을 풀면 Exception이 발생하므로 트랜잭션은 롤백

//onjoraclejava.xml에서 rollback-for="Exception"으로 정의했기 때문

//만약 정의하지 않았다면 주석을 풀더라도 트랜잭션은 롤백안됨

//throw new Exception();

}

4. OnjService.java

package onj.edu.tr1.service;

import java.util.List;

import onj.edu.tr1.dao.OnjDao;

import onj.edu.tr1.model.Emp;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

@Service("onjService")

public class OnjService {

@Autowired

private OnjDao dao;

public OnjService() {}

public OnjService(OnjDao onjDao) {

this.dao = onjDao;

}

public List<Emp> getEmpByDeptno(int deptno) {

return dao.getEmpByDeptno(deptno);

}

public void insertEmps() throws Exception{

dao.insertEmps();

}

5. onjoraclejava.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"

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

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

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

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

xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd

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

http://www.springframework.org/schema/aop/spring-aop-3.2.xsd

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

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

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

http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">

<bean name="dataSource"

class="org.apache.commons.dbcp.BasicDataSource"

p:driverClassName ="oracle.jdbc.driver.OracleDriver"

p:url = "jdbc:oracle:thin:@192.168.0.7:1521:onj"

p:username = "scott"

p:password = "tiger" />

</bean>

<tx:annotation-driven transaction-manager="transactionManager"/>

<context:component-scan base-package="onj.edu.tr1.dao"/>

<context:component-scan base-package="onj.edu.tr1.service"/>

</beans>

6. 테스트를 위한 client program

package onj.edu.tr1.client;

import java.util.List;

import onj.edu.tr1.model.Emp;

import onj.edu.tr1.service.OnjService;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class OnjEmpTest {

public static void main(String[] args) throws Exception{

ApplicationContext ctx = new ClassPathXmlApplicationContext("onjoraclejava.xml");

OnjService onjService = (OnjService)ctx.getBean("onjService");

List<Emp> list = onjService.getEmpByDeptno(10);

display(list);

onjService.insertEmps();

list = onjService.getEmpByDeptno(10);

display(list);

}

public static void display(List<Emp> list) {

for(Object e: list) {

System.out.print(((Emp)e).getEmpno());

System.out.print(((Emp)e).getEname());

System.out.println(((Emp)e).getDeptno());

}

7. 결과…. 일부러 중복된 데이터를 입력했는데 정상적으로 롤백 되었다.

3월 02, 2014 5:51:25 오후 org.springframework.context.support.AbstractApplicationContext prepareRefresh

정보: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@bf7916: startup date [Sun Mar 02 17:51:25 KST 2014]; root of context hierarchy

3월 02, 2014 5:51:25 오후 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions

정보: Loading XML bean definitions from class path resource [onjoraclejava.xml]

3월 02, 2014 5:51:25 오후 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons

정보: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@15cd7a9: defining beans [dataSource,transactionManager,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0,org.springframework.transaction.interceptor.TransactionInterceptor#0,org.springframework.transaction.config.internalTransactionAdvisor,onjDao,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,onjService,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; root of factory hierarchy

7782CLARK10

7839KING10

7934MILLER10

7771Onj110

7772Onj210

7773Onj310

------------------------

3월 02, 2014 5:51:26 오후 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions

정보: Loading XML bean definitions from class path resource [org/springframework/jdbc/support/sql-error-codes.xml]

3월 02, 2014 5:51:26 오후 org.springframework.jdbc.support.SQLErrorCodesFactory <init>

정보: SQLErrorCodes loaded: [DB2, Derby, H2, HSQL, Informix, MS-SQL, MySQL, Oracle, PostgreSQL, Sybase]

Exception in thread "main" org.springframework.dao.DuplicateKeyException: PreparedStatementCallback; SQL [insert into emp(empno, ename, deptno) values (?, ?, ?)]; ORA-00001: 무결성 제약 조건(SCOTT.PK_EMP)에 위배됩니다

; nested exception is java.sql.SQLIntegrityConstraintViolationException: ORA-00001: 무결성 제약 조건(SCOTT.PK_EMP)에 위배됩니다

at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:245)

at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72)

at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:605)

at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:818)

at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:874)

at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:882)

at onj.edu.tr1.dao.OnjDao.insertEmps(OnjDao.java:59)

at onj.edu.tr1.dao.OnjDao$$FastClassByCGLIB$$64f4b819.invoke(<generated>)

at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)

at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:698)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)

at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:96)

at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:260)

at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)

at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:631)

at onj.edu.tr1.dao.OnjDao$$EnhancerByCGLIB$$c6f202f9.insertEmps(<generated>)

at onj.edu.tr1.service.OnjService.insertEmps(OnjService.java:26)

at onj.edu.tr1.client.OnjEmpTest.main(OnjEmpTest.java:21)

Caused by: java.sql.SQLIntegrityConstraintViolationException: ORA-00001: 무결성 제약 조건(SCOTT.PK_EMP)에 위배됩니다

at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:85)

at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:133)

at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:206)

at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:455)

at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:413)

at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:1034)

at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:194)

at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:953)

at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1222)

at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3387)

at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:3468)

at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeUpdate(OraclePreparedStatementWrapper.java:1350)

at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:105)

at org.springframework.jdbc.core.JdbcTemplate$2.doInPreparedStatement(JdbcTemplate.java:824)

at org.springframework.jdbc.core.JdbcTemplate$2.doInPreparedStatement(JdbcTemplate.java:818)

at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:589)

... 16 more

8. EMP TABLE SELECT 결과

SQL> select empno, ename, deptno from emp where deptno=10;

EMPNO ENAME DEPTNO

---------- ---------- ----------

7782 CLARK 10

7839 KING 10

7934 MILLER 10

7771 Onj1 10

7772 Onj2 10

7773 Onj3 10

9. 이번에는 OnjDao.java에서 중복된 데이터 입력하는 부분을 주석으로 막고 실행해보자.

[OnjDao.java]

package onj.edu.tr1.dao;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.util.List;

import javax.sql.DataSource;

import onj.edu.tr1.model.Emp;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.jdbc.core.JdbcTemplate;

import org.springframework.jdbc.core.RowMapper;

import org.springframework.stereotype.Repository;

import org.springframework.transaction.annotation.Transactional;

//JdbcDaoSupport클래스는 간단한 DataSource를 지원하기 위해 JdbcTemplate 클래스를 지원.

//jdbcTemplate은 DB연결, PrepatedStatement객체생성, 파라미터주입, SQL문장실행,

//DB접속종료등을 전담하며 getJdbcTemplate()을 통해 얻는다.

@Repository("onjDao")

public class OnjDao{

private JdbcTemplate jdbaTemplate;

@Autowired

public void setDataSource(DataSource dataSource){

this.jdbaTemplate = new JdbcTemplate(dataSource);

}

public List<Emp> getEmpByDeptno(int deptno) {

String sql = "select empno, ename, deptno from emp where deptno = ?";

List<Emp> list = jdbaTemplate.query(

sql,

new Object[] { deptno },

new RowMapper() {

public Object mapRow(ResultSet rs, int index) throws SQLException {

int empno = rs.getInt("empno");

String ename = rs.getString("ename");

int deptno = rs.getInt("deptno");

return new Emp(empno, ename, deptno);

}

);

return list;

}

@Transactional

public void insertEmps() throws Exception {

String sql = "insert into emp(empno, ename, deptno) values (?, ?, ?)";

jdbaTemplate.update(sql, new Object[] { 1771, "오자바1" , 10});

jdbaTemplate.update(sql, new Object[] { 1772, "오자바2", 10 });

jdbaTemplate.update(sql, new Object[] { 1773, "오자바3", 10 });

//같은 데이터를 넣으면 키값이 중복되어 DataAccessException 발생(런타임예외)

//jdbaTemplate.update(sql, new Object[] { 1773, "오자바3", 10 });

//아래 주석을 풀면 Exception이 발생하므로 트랜잭션은 롤백

//onjoraclejava.xml에서 rollback-for="Exception"으로 정의했기 때문

//만약 정의하지 않았다면 주석을 풀더라도 트랜잭션은 롤백안됨

//throw new Exception();

}

[cOnjEmpTest.java 실행 결과]

3월 02, 2014 5:55:36 오후 org.springframework.context.support.AbstractApplicationContext prepareRefresh

정보: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@a6af6e: startup date [Sun Mar 02 17:55:36 KST 2014]; root of context hierarchy

3월 02, 2014 5:55:36 오후 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions

정보: Loading XML bean definitions from class path resource [onjoraclejava.xml]

3월 02, 2014 5:55:37 오후 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons

정보: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@52a22d: defining beans [dataSource,transactionManager,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0,org.springframework.transaction.interceptor.TransactionInterceptor#0,org.springframework.transaction.config.internalTransactionAdvisor,onjDao,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,onjService,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; root of factory hierarchy

7782CLARK10

7839KING10

7934MILLER10

7771Onj110

7772Onj210

7773Onj310

------------------------

7782CLARK10

7839KING10

7934MILLER10

7771Onj110

7772Onj210

7773Onj310

1771오자바110

1772오자바210

1773오자바310

[ORACLE EMP 테이블 실행결과]

SQL> select empno, ename, deptno from emp where deptno=10;

EMPNO ENAME DEPTNO

---------- ---------- ----------

7782 CLARK 10

7839 KING 10

7934 MILLER 10

7771 Onj1 10

7772 Onj2 10

7773 Onj3 10

1771 오자바1 10

1772 오자바2 10

1773 오자바3 10

[OnjDao.java에서 //throw new Exception(); 부분 주석을 출고 테스트]

- onjoraclejava.xml에서 <tx:method name="*" propagation="REQUIRED" rollback-for="Exception"/>인 경우

트랜잭션은 롤백된다.

- onjoraclejava.xml에서 <tx:method name="*" propagation="REQUIRED“/>인 경우

트앤잭션은 롤백되지 않는다. 정상 commit된다.

확인해 보라.

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주말저녁(18:30~22:20) 개강
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2014년 7월 26일 토요일

[Spring transaction, tx:manager.스프링3트랜잭션강좌/예제]@Transactional 어노테이션을 이용한 spring framework트랜잭션(Annotation설정방식),오라클자바커뮤니티 스프링프레임웥크교육학원추천!

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