我目前正在开发一个Spring MVC应用程序。我已经配置了一个JDBC TransactionManager,并且正在使用AOP XML进行声明式事务管理。但是,即使我将该方法配置为在只读= true上运行,它仍然会提交交易。
数据库:Oracle 10g
我的database-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schem...ring-beans.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${driver}" />
<property name="url" value="${url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
<property name="defaultAutoCommit" value="false" />
</bean>
<bean id="txManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="mapperLocations" value="classpath:com/mybatis/mappers/*.xml" />
</bean>
<!--
the transactional advice (what 'happens'; see the <aop:advisor/> bean
below)
-->
<tx:advice id="txAdvice" transaction-manager="txManager">
<!-- the transactional semantics... -->
<tx:attributes>
<!-- all methods starting with 'get' are read-only -->
<tx:method name="get*" read-only="true" />
<!-- other methods use the default transaction settings (see below) -->
<tx:method name="*" read-only="true" rollback-for="RuntimeException"/>
</tx:attributes>
</tx:advice>
<!--
ensure that the above transactional advice runs for any execution of
an operation defined by the FooService interface
-->
<aop:config>
<aop:pointcut id="fooServiceOperation"
expression="execution(* com.service.EmployeeService.*(..))" />
<aop:advisor advice-ref="txAdvice" pointcut-ref="fooServiceOperation" />
</aop:config>
</beans>
我的 Controller
package com.service;
import java.util.List;
import com.mybatis.dao.EmployeeMapperInterface;
import com.spring.model.Employee;
public class EmployeeService implements EmployeeBaseService{
EmployeeMapperInterface employeeMapper;
public EmployeeMapperInterface getEmployeeMapper() {
return employeeMapper;
}
public void setEmployeeMapper(EmployeeMapperInterface employeeMapper) {
this.employeeMapper = employeeMapper;
}
@Override
public Employee getEmployeeById(long empId){
//retrieve from database
List empList = employeeMapper.getEmployeeWithId(empId);
if(empList != null && empList.size()>0){
return (Employee) empList.get(0);
}
return null;
}
@Override
public long saveEmployee(Employee employee){
long empId = 0l;
if(employee.getEmpId()==0){
empId = new Long( employeeMapper.insertEmployee(employee));
}else{
employeeMapper.updateEmployee(employee);
empId = employee.getEmpId();
}
try {
System.out.println("gonna sleep");
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
return empId;
}
如何防止自动提交?我还注意到,即使我不放置任何事务管理代码,代码仍然会提交。请注意,但是,当我为 RuntimeException 添加 no-rollback-for 然后执行 1/0 时,会调用事务建议,如果我将与 rollback-for 相同的内容添加到其中,它会正确提交数据并回滚。 我还通过将线程置于 sleep 状态来尝试查询超时,即使这不起作用,但我认为超时可能适用于实际查询,所以这很好。 提前致谢!
最佳答案
建议只读
只是建议。当某些东西被标记为只读时,底层事务管理系统并不要求阻止写入,这更多的是作为一种优化提示,表明此方法是只读的,因此您不需要需要担心它会改变事情。如果在只读事务中进行更改,一些事务管理器会提示,有些则不会。一般来说,通过 JNDI 获取的数据源不会。无论如何,您都不应该依赖只读
建议来防止更改被写回磁盘。
防止更改持久化的选项有:
标记事务
仅回滚
或抛出具有相同效果的异常在更改对象之前从事务 session 中分离/逐出该对象
克隆对象并使用克隆
关于spring-mvc - Spring MVC JDBC 数据源事务管理器 : Data committed even after readonly=true,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/10477039/