Spring-test做数据库操作的单元测试2-跨库访问
首先说明，我使用的是jotm来实现跨数据库的事务管理。
第二，在我完成这个测试的时候才发现，其实这个主要还是讲如何使用jotm来做多数据源的事务管理。貌似和spring-test的关系并不大了。至少单元代码上可以说是一模一样。
下面直接看spring配置文件
<?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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" 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/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd"> <bean id="jotm" class="org.springframework.transaction.jta.JotmFactoryBean" /> <bean id="txManager" class="org.springframework.transaction.jta.JtaTransactionManager"> <property name="userTransaction" ref="jotm" /> <property name="allowCustomIsolationLevels" value="true" /> </bean> <bean id="ds1" class="org.enhydra.jdbc.pool.StandardXAPoolDataSource" destroy-method="shutdown"> <property name="dataSource"> <bean class="org.enhydra.jdbc.standard.StandardXADataSource" destroy-method="shutdown"> <property name="transactionManager" ref="jotm" /> <property name="driverName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:MySQL://localhost:3306/test" /> </bean> </property> <property name="user" value="root" /> <property name="password" value="11" /> </bean> <bean id="ds2" class="org.enhydra.jdbc.pool.StandardXAPoolDataSource" destroy-method="shutdown"> <property name="dataSource"> <bean class="org.enhydra.jdbc.standard.StandardXADataSource" destroy-method="shutdown"> <property name="transactionManager" ref="jotm" /> <property name="driverName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:MySQL://localhost:3306/test2" /> </bean> </property> <property name="user" value="root" /> <property name="password" value="11" /> </bean> <!-- <bean id="sessionFactory1" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> <property name="dataSource"> <ref local="ds1" /> </property> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect"> org.hibernate.dialect.MySQLInnoDBDialect </prop> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.jdbc.batch_size">20</prop> </props> </property> <property name="annotatedClasses" value="com.koubei.jotm.model.User" /> </bean> <bean id="sessionFactory2" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> <property name="dataSource"> <ref local="ds2" /> </property> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect"> org.hibernate.dialect.MySQLInnoDBDialect </prop> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.jdbc.batch_size">20</prop> </props> </property> <property name="annotatedClasses" value="com.koubei.jotm.model.User" /> </bean> --> <bean id="userDao1" class="com.koubei.jotm.dao.UserDaoImpl"> <property name="dataSource" ref="ds1" /> <!-- <property name="sessionFactory" ref="sessionFactory1" /> --> </bean> <bean id="userDao2" class="com.koubei.jotm.dao.UserDao2Impl"> <property name="dataSource" ref="ds2" /> <!-- <property name="sessionFactory" ref="sessionFactory2" /> --> </bean> <bean id="userService" class="com.koubei.jotm.service.UserServiceImpl"> <property name="userDao1" ref="userDao1" /> <property name="userDao2" ref="userDao2" /> </bean> </beans>
注意我使用的是jdbc，而不是hibernate，原因下面会说。
其他的代码不贴了，就贴下UserServiceImpl.java的代码
package com.koubei.jotm.service;
import com.koubei.jotm.dao.UserDao;
import com.koubei.jotm.dao.UserDao2;
import com.koubei.jotm.model.User;
/**
* @author zhenghui
* @version 1.0
* @date 2011-2-22 下午02:57:24
*
*/
public class UserServiceImpl implements UserService {
private UserDao userDao1;
private UserDao2 userDao2;
public void insertUser(User user) {
userDao1.insert(user);
userDao2.insert(user);
}
public UserDao getUserDao1() {
return userDao1;
}
public void setUserDao1(UserDao userDao1) {
this.userDao1 = userDao1;
}
public UserDao2 getUserDao2() {
return userDao2;
}
public void setUserDao2(UserDao2 userDao2) {
this.userDao2 = userDao2;
}
}
最后是最主要的测试代码
package com.koubei.jotm.service;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.annotation.Rollback;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.transaction.TransactionConfiguration;
import org.springframework.transaction.annotation.Transactional;
import com.koubei.jotm.model.User;
/**
* @author zhenghui * @version 1.0
* @data 2011-2-11 下午03:22:14
*
*/
@RunWith(SpringJUnit4ClassRunner.class) //指定测试用例的运行器 这里是指定了Junit4
@ContextConfiguration("classpath:applicationContext.xml")
@TransactionConfiguration(transactionManager="txManager",defaultRollback=true)
@Transactional()
public class TestUserDao {
@Autowired
private UserService userService;
@Test
@Rollback(false)
public void testSaveUser() {
User user = new User();
user.setName("ceshi1");
user.setPassword("hello123");
userService.insertUser(user);
}
}
经测试，只要设置@Rollback(true) 那么就能支持在不同数据源自动回滚。
最后说明一个问题：最开始的时候我使用的是hibernate，而不是jdbc。最后写单元测试代码的时候发现 @Rollback(true)的时候单元测试通过，事务也会自动回滚，但是@Rollback(false)的时候，就会报org.hibernate.HibernateException: identifier of an instance of com.koubei.jotm.model.User was altered from 10 to 8 错误。网上的资料说明是hibernate在同一个事务中修改对应实体对象的ID，导致出错。找了好多资料，没找到解决的方案。
上传源代码，其中也有我用hibernate的配置（不过已经都注释了）。如果有朋友找到这个问题的解决方案，望告之。万分感谢。