高并发秒杀系统--Service事务管理与继承测试

[Spring IoC的类型及应用场景]

 [Spring事务使用方式]

 

[Spring事务的特性]

[Spring事务回滚的理解]

[Service声明式事务的配置]

1.配置事务管理器

2.配置基于注解的声明式事务

<?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:aop="http://www.springframework.org/schema/aop"
       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/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">
    <!-- 扫描service包下所有使用注解的类型 -->
    <context:component-scan base-package="org.azcode.service"/>

    <!-- 声明式事务的配置 -->
    <!-- step1: 配置事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!-- 注入数据库连接池 -->
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!-- step2: 配置基于注解的声明式事务
        默认使用注解来管理事务行为
    -->
    <tx:annotation-driven transaction-manager="transactionManager"/>
</beans>

[使用注解控制事务的优点]

1:开发团队达成一致约定,明确标注事务方法的编程风格

2:保证事务方法的执行时间尽可能短,不要穿插其他的网络操作,RPC/HTTP请求或者剥离到事务方法外.

3:不是所有的方法都需要事务,如只有一条修改操作,只读操作不需要事务.(区别AOP+tx:advice的方式)

[Service单元测试总结]

1.对于已知异常需要捕获

public void executeSeckill() throws Exception {
        long id = 1004;
        long phone = 13665263598L;
        String md5 = "1e8672b6c06f90e5f4991cde12ed15cd";
        try {
            SeckillExecution seckillExecution = seckillService.executeSeckill(id, phone, md5);
            logger.info("seckillExecution={}", seckillExecution);
        } catch (RepeatKillException e) {
            logger.error(e.getMessage());
        } catch (SeckillCloseException e) {
            logger.error(e.getMessage());
        }
        //seckillExecution=SeckillExecution{
        // seckillId=1004, state=1, stateInfo='秒杀成功',
        // successKilled=SuccessKilled{seckillId=1004, userPhone=13665263598,
        // status=0, createTime=Sun Apr 16 09:26:35 CST 2017}}

        //org.azcode.exception.SeckillException: seckill data rewrite
        //org.azcode.exception.RepeatKillException: seckill repeated
    }

2.业务相关的测试方法应整合在一起,形成一个完整的逻辑,保证可重复执行

暴露秒杀接口+执行秒杀

public void testSeckillLogic() throws Exception {
        long id = 1001;
        Exposer exposer = seckillService.exportSeckillUrl(id);
        if(exposer.isExposed()){
            //秒杀业务开始
            logger.info("exposer={}",exposer);
            long phone = 13665263598L;
            String md5 = exposer.getMd5();
            try {
                SeckillExecution seckillExecution = seckillService.executeSeckill(id, phone, md5);
                logger.info("seckillExecution={}", seckillExecution);
            } catch (RepeatKillException e) {
                logger.error(e.getMessage());
            } catch (SeckillCloseException e) {
                logger.error(e.getMessage());
            }
        }else{
            //秒杀业务未开启
            logger.warn("exposer={}",exposer);
            //exposer=Exposer{exposed=false, md5='null',
            // seckillId=1001, now=1492307486311,
            // start=1492099200000, end=1492185600000}
        }
    }
原文地址:https://www.cnblogs.com/azcode/p/6718028.html