Spring学习笔记十七---声明式事务

 <?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: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/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">

    <context:component-scan base-package="springjdbc"></context:component-scan>
    <!-- import resource files -->
    <context:property-placeholder location="classpath:springjdbc/db.properties"></context:property-placeholder>

    <!-- C3P0 DataSource -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="user" value="${jdbc.user}"/>
        <property name="password" value="${jdbc.password}"/>
        <property name="jdbcUrl" value="${jdbc.jdbcUrl}"/>
        <property name="driverClass" value="${jdbc.driverClass}"/>
        <property name="initialPoolSize" value="${jdbc.initPoolSize}"/>
        <property name="maxPoolSize" value="${jdbc.maxPoolSize}"/>
    </bean>

    <!-- jdbc template -->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!-- 具名参数 -->
    <bean id="namedParameterJdbcTemplate" class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate">
        <constructor-arg ref="dataSource"/>
    </bean>

    <!-- 声明式事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    <!--启用事务注解 -->
   </bean>
    <tx:annotation-driven transaction-manager="transactionManager"/>


</beans>

 package springjdbc.tx;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service("bookShopService")
public class BookShopServiceImpl implements IBookShopService {
    @Autowired
    private IBookShopDao iBookShopDao;

    @Transactional
    @Override
    public void purchase(String userName, String isbn) {
        //get book price
        iBookShopDao.findBookPriceByIsbn(isbn);

        //update book stock
        iBookShopDao.updateBookStock(isbn);

        //update user account
        iBookShopDao.updateUserAccount(userName, isbn);

    }
}