Spring事务管理四：声明式事务

<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:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
     http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">

<!--JDBC事务管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"/>
</bean>
<!-- 声明式事务配置 -->
<aop:config proxy-target-class="true">
    <aop:advisor advice-ref="txAdvice"
                 pointcut="within(cn.bookingsmart..impl.*Impl) &amp;&amp; execution(* *(..))"/>
</aop:config>
<!-- 通用事务通知 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
    <tx:attributes>
        <tx:method name="get*" read-only="true"/>
        <tx:method name="find*" read-only="true"/>
        <tx:method name="query*" read-only="true"/>
        <tx:method name="list*" read-only="true"/>
        <tx:method name="do*" propagation="REQUIRED" rollback-for="Exception"/>
        <tx:method name="save*" propagation="REQUIRED" rollback-for="Exception"/>
        <tx:method name="insert*" propagation="REQUIRED" rollback-for="Exception"/>
        <tx:method name="update*" propagation="REQUIRED" rollback-for="Exception"/>
        <tx:method name="delete*" propagation="REQUIRED" rollback-for="Exception"/>
    </tx:attributes>
</tx:advice>

public @interface Transactional {
    String value() default "";
    // 事务传播机制
    Propagation propagation() default Propagation.REQUIRED;
    // 事务的隔离级别
    Isolation isolation() default Isolation.DEFAULT;
    // 事务超时时间
    int timeout() default TransactionDefinition.TIMEOUT_DEFAULT;
    // 事务是否只读
    boolean readOnly() default false;
    // 定义使事务回滚的异常类
    Class<? extends Throwable>[] rollbackFor() default {};
    // 定义使事务回滚的异常类名称
    String[] rollbackForClassName() default {};
    // 定义不使异常回滚的异常类
    Class<? extends Throwable>[] noRollbackFor() default {};
    // 定义不使异常回滚的异常类名称
    String[] noRollbackForClassName() default {};
}

<!--开启注解事务支持-->
<tx:annotation-driven/>

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

// 方法受事务控制，而且抛出RuntimeException，事务回滚，无法插入数据
@Transactional(propagation = Propagation.REQUIRED)
@Override
public void tryInsert(User user) throws Exception {
    userMapper.insert(user);
    // 模拟抛出异常，事务回滚
    throw new NullPointerException("hahaha");
}

// 方法不受事务控制，可以正常插入数据
@Override
public void tryInsert(User user) throws Exception {
    userMapper.insert(user);
    // 模拟抛出异常，事务回滚
    throw new Exception("hahaha");
}

// 方法受事务控制，但是抛出的是Exception，默认不会滚，可以正常插入数据
@Transactional(propagation = Propagation.REQUIRED)
@Override
public void tryInsert(User user) throws Exception {
    userMapper.insert(user);
    // 模拟抛出异常，事务回滚
    throw new Exception("hahaha");
}

@Transactional(propagation = Propagation.SUPPORTS, readOnly = true) (1)
@Service
public class UserServiceImpl implements UserService {

}

2018-03-08 17:22:13.081 DEBUG - [org.springframework.jdbc.datasource.DataSourceTransactionManager] Creating new transaction with name [cn.bookingsmart.service.impl.UserServiceImpl.tryInsert]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''
……
[org.springframework.jdbc.datasource.DataSourceTransactionManager] Initiating transaction rollback
 2018-03-08 17:22:16.649 DEBUG - [org.springframework.jdbc.datasource.DataSourceTransactionManager] Rolling back JDBC transaction on Connection [com.alibaba.druid.proxy.jdbc.ConnectionProxyImpl@33bb65bd]
 2018-03-08 17:22:16.652 DEBUG - [org.mybatis.spring.SqlSessionUtils] Transaction synchronization rolling back SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@44d29b15]
 2018-03-08 17:22:16.652 DEBUG - [org.mybatis.spring.SqlSessionUtils] Transaction synchronization closing SqlSession