【redis事务】@Transactional对Redis事务起作用（包含redis+lua）

数据库 2023-09-11 17:34:21 阅读次数: 0

【redis事务】@Transactional对Redis事务起作用（包含redis+lua）

一、前言

最近工作中涉及到的事务比较多，也有用到redis事务，之前的文章也介绍过redis事务，为了方便redis使用，我们把redis事务结合springboot的@Transactional注解使用，这里为了方便大家使用，写一个demo验证一下；

注：同时也验证一下redis+lua脚本执行中，@Transactional注解事务是否生效

二、准备

为了对比事务，我们同时使用数据库（postgresql）事务和redis事务；

引入pom.xml依赖

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>

        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.3</version>
        </dependency>

        <!-- postgresql 配置-->
        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <scope>runtime</scope>
        </dependency>

三、StringRedisTemplate 开启事务

package com.sk.config;

import lombok.RequiredArgsConstructor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.core.StringRedisTemplate;

@Configuration
@RequiredArgsConstructor
public class RedisConfig {
    
    

    private final StringRedisTemplate stringRedisTemplate;

    @Bean
    public void getRedisTemplate(){
    
    
        stringRedisTemplate.setEnableTransactionSupport(true);
    }

}

四、关键代码（验证@Transactional对redis事务是否生效）

1、正常执行

package com.sk.service.impl;

import com.sk.mapper.StudentMapper;
import com.sk.service.AnimalService;
import lombok.RequiredArgsConstructor;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service("dogService")
@RequiredArgsConstructor
//@ConditionalOnProperty(prefix = "formatter",name="enabled",havingValue = "true")
public class DogServiceImpl implements AnimalService {
    
    

    private final StringRedisTemplate stringRedisTemplate;

    private final StudentMapper studentMapper;

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void play() {
    
    

        System.out.println("狗拿耗子！！！");
        boolean insert = studentMapper.insertUser(3,"刘英","男","123456","");
        System.out.println("pg插入结果:"+insert);
        stringRedisTemplate.opsForValue().set("3","liuying");
        System.out.println("==========执行完成======");
        //throw new RuntimeException("redis事务测试");
    }

    @Override
    public void eat() {
    
    
        System.out.println("狗爱吃骨头！！！");
    }
}

执行结果：

2022-12-11 11:46:37.268  INFO 9752 --- [nio-8089-exec-2] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
狗拿耗子！！！
pg插入结果:true
==========执行完成======

在这里插入图片描述

127.0.0.1:6379> get 3
"liuying"
127.0.0.1:6379> 
127.0.0.1:6379> 
127.0.0.1:6379>

2、事务回滚

package com.sk.service.impl;

import com.sk.mapper.StudentMapper;
import com.sk.service.AnimalService;
import lombok.RequiredArgsConstructor;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service("dogService")
@RequiredArgsConstructor
//@ConditionalOnProperty(prefix = "formatter",name="enabled",havingValue = "true")
public class DogServiceImpl implements AnimalService {
    
    

    private final StringRedisTemplate stringRedisTemplate;

    private final StudentMapper studentMapper;

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void play() {
    
    

        System.out.println("狗拿耗子！！！");
        boolean insert = studentMapper.insertUser(3,"刘英","男","123456","");
        System.out.println("pg插入结果:"+insert);
        stringRedisTemplate.opsForValue().set("3","liuying");
        System.out.println("==========执行完成======");
        throw new RuntimeException("redis事务测试");
    }

    @Override
    public void eat() {
    
    
        System.out.println("狗爱吃骨头！！！");
    }
}

执行结果

2022-12-11 11:51:28.699  INFO 12864 --- [nio-8089-exec-1] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
狗拿耗子！！！
pg插入结果:true
==========执行完成======
2022-12-11 11:51:29.978 ERROR 12864 --- [nio-8089-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.RuntimeException: redis事务测试] with root cause

java.lang.RuntimeException: redis事务测试
	at com.sk.service.impl.DogServiceImpl.play(DogServiceImpl.java:28) ~[classes/:na]
	at com.sk.service.impl.DogServiceImpl$$FastClassBySpringCGLIB$$6e845405.invoke(<generated>) ~[classes/:na]
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.3.23.jar:5.3.23]

在这里插入图片描述

127.0.0.1:6379> get 5
(nil)
127.0.0.1:6379> 
127.0.0.1:6379>

由结果可知，pg数据库和redis中数据并没有存储成功，证明事务生效；

五、关键代码（验证@Transactional对redis+lua是否生效）

1、lua脚本：

local key = KEYS[1]
redis.call("INCR",key);

2、初始化lua脚本：

/**
     * 读取限流脚本
     *
     * @return
     */
    @Bean
    public DefaultRedisScript<Number> redisluaScript() {
    
    
        DefaultRedisScript<Number> redisScript = new DefaultRedisScript<>();
        redisScript.setScriptSource(new ResourceScriptSource(new ClassPathResource("lua/test.lua")));
        redisScript.setResultType(Number.class);
        return redisScript;
    }

3、正常执行

package com.sk.service.impl;

import com.sk.mapper.StudentMapper;
import com.sk.service.AnimalService;
import lombok.RequiredArgsConstructor;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.script.DefaultRedisScript;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service("dogService")
@RequiredArgsConstructor
//@ConditionalOnProperty(prefix = "formatter",name="enabled",havingValue = "true")
public class DogServiceImpl implements AnimalService {
    
    

    private final StringRedisTemplate stringRedisTemplate;

    private final StudentMapper studentMapper;

    private final DefaultRedisScript defaultRedisScript;

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void play() {
    
    
        System.out.println("执行lua脚本");
        List<String> keys = new ArrayList();
        keys.add("count");
        stringRedisTemplate.execute(defaultRedisScript, keys);
        System.out.println("==========执行完成======");
        //throw new RuntimeException("redis事务测试");
    }

    @Override
    public void eat() {
    
    
        System.out.println("狗爱吃骨头！！！");
    }
}

执行结果

127.0.0.1:6379> get count
"1"
127.0.0.1:6379> 
127.0.0.1:6379>

4、执行失败

package com.sk.service.impl;

import com.sk.mapper.StudentMapper;
import com.sk.service.AnimalService;
import lombok.RequiredArgsConstructor;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.script.DefaultRedisScript;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service("dogService")
@RequiredArgsConstructor
//@ConditionalOnProperty(prefix = "formatter",name="enabled",havingValue = "true")
public class DogServiceImpl implements AnimalService {
    
    

    private final StringRedisTemplate stringRedisTemplate;

    //private final StudentMapper studentMapper;

    private final DefaultRedisScript defaultRedisScript;

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void play() {
    
    
        System.out.println("执行lua脚本");
        List<String> keys = new ArrayList();
        keys.add("count");
        stringRedisTemplate.execute(defaultRedisScript, keys);
        System.out.println("==========执行完成======");
        throw new RuntimeException("redis事务测试");
    }

    @Override
    public void eat() {
    
    
        System.out.println("狗爱吃骨头！！！");
    }
}

执行结果

执行lua脚本

==========执行完成======
2022-12-11 12:19:33.272 ERROR 12736 --- [nio-8089-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.RuntimeException: redis事务测试] with root cause

java.lang.RuntimeException: redis事务测试
	at com.sk.service.impl.DogServiceImpl.play(DogServiceImpl.java:39) ~[classes/:na]

127.0.0.1:6379> get count
"1"
127.0.0.1:6379> 
127.0.0.1:6379>

由上可知，当程序执行异常时，lua脚本中的内容同样没有生效

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转载自blog.csdn.net/weixin_37598243/article/details/128273187
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