测试SpringBoot2使用JTA组件实现基于mybatis-plus多数据源事务管理(亲测好用)

测试SpringBoot2使用JTA组件实现基于mybatis-plus多数据源事务管理(亲测好用)

继上一篇实现基于JdbcTemplate的多数据源事务管理成功后,接着想到了那么Atomikos事务管理是否对mybatis-plus多数据源也同样适用呢?带着这个疑问我做了一个简单的实验,过程如下

准备工作(这里跟上篇文章用的环境都一样)

这里我们将使用最基础的JdbcTemplate来实现数据访问,所以如果你还不会使用JdbcTemplate配置多数据源,建议先看一下JdbcTemplate的多数据源配置。

场景设定:

假设我们有两个库,分别为:test1和test2
这两个库中都有一张User表,我们希望这两张表中的数据是一致的

假设这两张表中都已经有一条数据:name=aaa,age=30;因为这两张表中数据是一致的,所以要update的时候,就必须两个库中的User表更新时候,要么都成功,要么都失败。

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1、核心依赖

<!--JTA组件核心依赖-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-jta-atomikos</artifactId>
</dependency>

2、环境配置

yml配置文件这里jtaManager的配置,在日志输出中非常关键。

spring:
  jta:
    enabled: true
    transaction-manager-id: jtaManager
  datasource:
    username: root
    password: 123456
    url: jdbc:mysql://localhost:3306/test1?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false&allowPublicKeyRetrieval=true
    driver-class-name: com.mysql.jdbc.Driver
  backdatasource:
    username: root
    password: 123456
    url: jdbc:mysql://localhost:3306/test2?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false&allowPublicKeyRetrieval=true
    driver-class-name: com.mysql.jdbc.Driver

3、jta组件配置类

package com.sgcc.qfjs.config;

import com.mysql.jdbc.jdbc2.optional.MysqlXADataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
import org.springframework.boot.jta.atomikos.AtomikosDataSourceBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.env.Environment;
import org.springframework.jdbc.core.JdbcTemplate;

import javax.sql.DataSource;


@Configuration
public class JtaDataSourceConfig {

    @Autowired
    private Environment env;

    @Autowired
    private DataSourceProperties properties;

    @Bean
    @Primary
    public DataSource primaryDatasource() {
        //数据库链接
        MysqlXADataSource mysqlXADataSource = new MysqlXADataSource();
        mysqlXADataSource.setUrl(properties.getUrl());
        mysqlXADataSource.setUser(properties.getUsername());
        mysqlXADataSource.setPassword(properties.getPassword());
        mysqlXADataSource.setPinGlobalTxToPhysicalConnection(true);
        //事务管理
        AtomikosDataSourceBean atomikosDataSourceBean = new AtomikosDataSourceBean();
        atomikosDataSourceBean.setXaDataSource(mysqlXADataSource);
        atomikosDataSourceBean.setUniqueResourceName("dataSource");
        return atomikosDataSourceBean;
    }

    @Bean
    public DataSource backDatasource() {
        //数据库链接
        MysqlXADataSource mysqlXADataSource = new MysqlXADataSource();
        mysqlXADataSource.setUrl(env.getProperty("spring.backdatasource.url"));
        mysqlXADataSource.setUser(env.getProperty("spring.backdatasource.username"));
        mysqlXADataSource.setPassword(env.getProperty("spring.backdatasource.password"));
        mysqlXADataSource.setPinGlobalTxToPhysicalConnection(true);
        //事务管理
        AtomikosDataSourceBean atomikosDataSourceBean = new AtomikosDataSourceBean();
        atomikosDataSourceBean.setXaDataSource(mysqlXADataSource);
        atomikosDataSourceBean.setUniqueResourceName("backDataSource");
        return atomikosDataSourceBean;
    }

    @Bean("primaryTemplate")
    public JdbcTemplate primaryTemplate(){
        return new JdbcTemplate(primaryDatasource());
    }

    @Bean("backTemplate")
    public JdbcTemplate batchTemplate(){
        return new JdbcTemplate(backDatasource());
    }

}

4、mybatis配置文件,由于是双数据源,这里配置了两个

主数据库配置文件MybatisPlusConfigOne

package com.sgcc.qfjs.config;

import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;

import javax.sql.DataSource;


@Configuration
@MapperScan(basePackages = {"com.sgcc.qfjs.module.mapper"},sqlSessionTemplateRef = "primarySessionTemplate")
public class MybatisPlusConfigOne {

    @Autowired
    private DataSource primaryDatasource;

    /**
     * 分页插件
     */
    @Bean
    public PaginationInterceptor paginationInterceptor() {
        PaginationInterceptor page = new PaginationInterceptor();
        page.setLimit(-1);
        page.setDialectType("mysql");
        return page;
    }

    @Primary
    @Bean(name = "sqlSessionFactoryOne")
    public SqlSessionFactory sqlSessionFactoryOne() throws Exception {
        MybatisSqlSessionFactoryBean mybatisPlus = new MybatisSqlSessionFactoryBean();
        mybatisPlus.setDataSource(primaryDatasource);
        ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        mybatisPlus.setMapperLocations(resolver.getResources("classpath:mapper/*.xml"));
        return mybatisPlus.getObject();
    }
    @Primary
    @Bean(name = "primarySessionTemplate")
    public SqlSessionTemplate sqlSessionTemplate(
            @Qualifier("sqlSessionFactoryOne") SqlSessionFactory sqlSessionFactoryOne) {
        // 配置Session模板
        return new SqlSessionTemplate(sqlSessionFactoryOne);
    }
}

数据库配置文件MybatisPlusConfigTwo

package com.sgcc.qfjs.config;

import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;

import javax.annotation.Resource;
import javax.sql.DataSource;


@Configuration
@MapperScan(basePackages = {"com.sgcc.qfjs.module.mappertwo"},sqlSessionTemplateRef = "backSessionTemplate")
public class MybatisPlusConfigTwo {

    /**
     * 这里有坑,@Autowired 注解是按照类型装配的不能把backDatasource,注入进来
     */
    @Resource
    private DataSource backDatasource;

    /**
     * 分页插件
     */
    @Bean(name = "paginationInterceptortwo")
    public PaginationInterceptor paginationInterceptortwo() {
        PaginationInterceptor page = new PaginationInterceptor();
        page.setLimit(-1);
        page.setDialectType("mysql");
        return page;
    }

    @Bean(name = "sqlSessionFactoryTwo")
    public SqlSessionFactory sqlSessionFactoryTwo() throws Exception {
        MybatisSqlSessionFactoryBean mybatisPlus = new MybatisSqlSessionFactoryBean();
        mybatisPlus.setDataSource(backDatasource);
        ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        mybatisPlus.setMapperLocations(resolver.getResources("classpath:mappertwo/*.xml"));
        return mybatisPlus.getObject();
    }
    @Bean(name = "backSessionTemplate")
    public SqlSessionTemplate sqlSessionTemplate(
            @Qualifier("sqlSessionFactoryTwo") SqlSessionFactory sqlSessionFactoryTwo) {
        // 配置Session模板
        return new SqlSessionTemplate(sqlSessionFactoryTwo);
    }
}

注意一个注入的坑

/**
 * 这里有坑,@Autowired 注解是按照类型装配的不能把backDatasource注入进来,这里要用名称装配@Resource
 */
@Resource
private DataSource backDatasource;

5、测试服务类CatTestServiceImpl

package com.sgcc.qfjs.module.service.impl;
/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author wkf
 * @since 2020-09-16
 */
@Service
@Slf4j
public class CatTestServiceImpl extends ServiceImpl<CatTestMapper, CatTest> implements CatTestService {

    @Autowired
    private CatTesttwoService catTesttwoService;

    @Override
    @Transactional
    public void tx() {
        // 修改test1库中的数据
        this.baseMapper.tx();
        // 修改test2库中的数据
        catTesttwoService.tx();
    }

    @Override
    @Transactional
    public void tx2() {
        // 修改test1库中的数据
        this.baseMapper.tx();
        // 模拟:修改test2库之前抛出异常
        throw new RuntimeException();
    }
}

这里tx函数,是两句update操作,一般都会成功;而tx2函数中,我们人为的制造了一个异常,这个异常是在test1库中的数据更新后才产生的,这样就可以测试一下test1更新成功,之后是否还能在JTA的帮助下实现回滚。

6、创建测试类,编写测试用例

@RunWith(SpringRunner.class)
@SpringBootTest
public class AppTest {

    @Autowired
    private CatTestService catTestService;
    @Test
    public void test1() throws Exception {
        // 正确更新的情况
        catTestService.tx();
    }

    @Test
    public void test2() throws Exception {
        // 更新失败的情况
        try {
            catTestService.tx2();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

这里有两个测试用例:

test1:因为没有故意制造的异常,不出意外两个库的update都会成功,所以根据name=aaa去把两个数据查出来,看age是否都被更新到了40。

test2:tx2函数会把test1中name=aaa的用户age更新为50,然后抛出异常,JTA事务生效的话,会把age回滚回40,所以这里的检查也是两个库的aaa用户的age应该都为50,这样就意味着JTA事务生效,保证了test1和test2两个库中的User表数据更新一致,没有制造出脏数据。

7、测试验证

执行test1成功,查看数据库数据是否更新成功
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执行test2成功,查看数据库数据是否回滚成功

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2022-07-28 11:09:04.999|DEBUG|main|com.atomikos.logging.Slf4jLogger|Line:32| XAResource.rollback ( 6A74614D616E61676572313635383937373734343831353030303031:6A74614D616E6167657231 ) on resource dataSource represented by XAResource instance com.mysql.jdbc.jdbc2.optional.JDBC4SuspendableXAConnection@339b45f8
2022-07-28 11:09:05.010|DEBUG|main|com.atomikos.logging.Slf4jLogger|Line:32| rollback() done of transaction jtaManager165897774481500001
2022-07-28 11:09:05.010|DEBUG|main|com.atomikos.logging.Slf4jLogger|Line:32| rollback() done of transaction jtaManager165897774481500001
posted @ 2022-07-29 10:03  十月围城小童鞋  阅读(591)  评论(0编辑  收藏  举报