springcloud+springcloud alibaba+springboot+Nacos+Seata+Mybatis+Redis开发框架

拼搏现实的明天。 2021-09-24 15:54 274阅读 0赞

最近在使用springcloud Finchley.SR2 + springcloud alibaba 0.2.1.RELEASE + springboot 2.0.6.RELEASE+Nacos 1.3.1+Seata 0.9.0+Mybatis+Redis开发时，seata做全局分布式事务控制时一直报错.工程依赖jar包管理，  
源码地址[https://gitee.com/wuhan1/spring-cloud-alibaba-shop][https_gitee.com_wuhan1_spring-cloud-alibaba-shop]

<dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>Finchley.SR2</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                    <version>0.2.1.RELEASE</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
    
                <dependency>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-dependencies</artifactId>
                    <version>2.0.6.RELEASE</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
    
                
                <dependency>
                    <groupId>mysql</groupId>
                    <artifactId>mysql-connector-java</artifactId>
                    <version>5.1.46</version>
                </dependency>
    
                
                <dependency>
                    <groupId>org.mybatis.spring.boot</groupId>
                    <artifactId>mybatis-spring-boot-starter</artifactId>
                    <version>1.3.0</version>
                </dependency>
    
                
                <dependency>
                    <groupId>com.alibaba</groupId>
                    <artifactId>druid</artifactId>
                    <version>1.1.9</version>
                </dependency>
    
                <dependency>
                    <groupId>org.redisson</groupId>
                    <artifactId>redisson</artifactId>
                    <version>3.5.0</version>
                </dependency>
    
            
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-seata</artifactId>
                <version>2.1.0.RELEASE</version>
                <exclusions>
                    <exclusion>
                        <artifactId>seata-all</artifactId>
                        <groupId>io.seata</groupId>
                    </exclusion>
                </exclusions>
            </dependency>
            <dependency>
                <groupId>io.seata</groupId>
                <artifactId>seata-all</artifactId>
                <version>0.9.0</version>
            </dependency>
    
            </dependencies>
        </dependencyManagement>

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RoajE5OTE4MQ_size_16_color_FFFFFF_t_70][]

`业务逻辑执行的时候报下面的错，找不到服务`  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RoajE5OTE4MQ_size_16_color_FFFFFF_t_70 1][]  
  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RoajE5OTE4MQ_size_16_color_FFFFFF_t_70 2][]  
`主要是配置没配好，0.9.0版本的seata跟1.0以后的使用差别还是有点大，详细配置如下 1.下载seata0.9.0，地址：http://seata.io/zh-cn/blog/download.html 2.进入conf目录下，创建seatas数据库，执行脚本和修改file.conf、registry.conf、nacos-config.txt三个文件，`  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RoajE5OTE4MQ_size_16_color_FFFFFF_t_70 3][]  
  
`创建seata数据库，执行脚本db_store.sql、，对应的业务表下都需要执行db_undo_log.sql，`  
![20200908142644494.png][]，![20200908142703976.png][]  
`file.conf修改的地方，使用的db方式存储数据，所以后面的要配置数据库的连接`  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RoajE5OTE4MQ_size_16_color_FFFFFF_t_70 4][]  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RoajE5OTE4MQ_size_16_color_FFFFFF_t_70 5][]  
  
`registry.conf修改，注册中心改成nacos`  
![202009081430028.png][]  
![20200908143016204.png][]  
`修改nacos-config.txt文件，配置seata的事务组名称等信息`  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RoajE5OTE4MQ_size_16_color_FFFFFF_t_70 6][]  
  
`3.比较重要的一点，需要把seata的配置信息注册到nacos上，在conf目录下执行命令 sh nacos-config.sh localhost 在nacos那边也可以看到，`  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RoajE5OTE4MQ_size_16_color_FFFFFF_t_70 7][]  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RoajE5OTE4MQ_size_16_color_FFFFFF_t_70 8][]  
`4.需要把file.conf和registry.conf文件复制到工程的resources下面,并且在application.yml中配置seata的事务组名称。`  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RoajE5OTE4MQ_size_16_color_FFFFFF_t_70 9][]![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RoajE5OTE4MQ_size_16_color_FFFFFF_t_70 10][]  
  
还有很重要的一点，在启动类中加入以下代码 ，否则会发现失败了事务却没有回滚，主要是 配置seata 数据源，数据源采用 druid 的DruidDataSource，但实际 jdbcTemplate 执行时并不是用该数据源，而用的是 seata 对DruidDataSource的代理DataSourceProxy，所以，与 RM 相关的代码逻辑基本上都是从DataSourceProxy这个代理数据源开始的。

@Bean
    	@ConfigurationProperties(prefix = "spring.datasource")
    	public DruidDataSource druidDataSource() {
    		return new DruidDataSource();
    	}
    
        /**
         * 需要将 DataSourceProxy 设置为主数据源，否则事务无法回滚
         */
        @Primary
    	@Bean("dataSource")
    	public DataSource dataSource(DruidDataSource druidDataSource) {
    		return new DataSourceProxy(druidDataSource);
    	}

`重新启动工程就OK了`

[https_gitee.com_wuhan1_spring-cloud-alibaba-shop]: https://gitee.com/wuhan1/spring-cloud-alibaba-shop
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[20200908142644494.png]: https://img-blog.csdnimg.cn/20200908142644494.png
[20200908142703976.png]: /images/20210923/e34a90dc6b10457492e6025fc33bfa1c.png
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