Guns 企业版多数据源配置集成dynamic-datasource

文章目录

• ​​一、改造多数据源​​

• ​​1. 依赖引入​​
• ​​2. 启动类添加注解​​
• ​​3. 配置多数据源​​

• ​​二、案例实战​​

• ​​2.1. controller​​
• ​​2.2. service​​
• ​​2.3. impl​​
• ​​2.4. mapper​​
• ​​2.5. xml​​

• ​​三、分页失效解决方案​​

一、改造多数据源

1. 依赖引入

目前改用dynamic-datasource方式多数据源处理，配置如下图：

<!--置动态数据源-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>dynamic-datasource-spring-boot-starter</artifactId>
            <version>3.4.1</version>
        </dependency>

2. 启动类添加注解

@SpringBootApplication(exclude = DruidDataSourceAutoConfigure.class)

3. 配置多数据源

########################################## 多数据源配置 ############################################
spring:
  datasource:
    dynamic:
      primary: master #设置默认的数据源或者数据源组,默认值即为master
      strict: false #严格匹配数据源,默认false. true未匹配到指定数据源时抛异常,false使用默认数据源
      datasource:
        master:
          url: jdbc:mysql://localhost:3306/dbmysql?autoReconnect=true&useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=CONVERT_TO_NULL&useSSL=false&serverTimezone=CTT&nullCatalogMeansCurrent=true
          username: root
          password: 123456
          driver-class-name: com.mysql.cj.jdbc.Driver # 3.2.0开始支持SPI可省略此配置

二、案例实战

使用规范：只需要在持久层接口类上添加@DS(“oracle_1”) 注解，里面写yml配置的数据库别名即可

2.1. controller

/**
 * 英雄信息表控制器
 *
 * @author gblfy
 * @Date 2021-08-13 11:19:00
 */
@Controller
@RequestMapping("/hero")
public class HeroController extends BaseController {

    private String PREFIX = "/antifraud/hero";

    @Autowired
    private HeroService heroService;

    /**
     * 查询列表
     *
     * @author gblfy
     * @Date 2021-08-13
     */
    @ResponseBody
    @RequestMapping("/list")
    public LayuiPageInfo list(HeroParam heroParam) {
        return this.heroService.findPageBySpec(heroParam);
    }

2.2. service

/**
 * <p>
 * 英雄信息表 服务类
 * </p>
 *
 * @author gblfy
 * @since 2021-08-13
 */
public interface HeroService extends IService<Hero> {


    /**
     * 查询分页数据，Specification模式
     *
     * @author gblfy
     * @Date 2021-08-13
     */
     LayuiPageInfo findPageBySpec(HeroParam param);

}

2.3. impl

@Service
public class HeroServiceImpl extends ServiceImpl<HeroMapper, Hero> implements HeroService {

    @Autowired
    private HeroMapper heroMapper;

    @Override
    public LayuiPageInfo findPageBySpec(HeroParam param){
        Page pageContext = getPageContext();
        IPage page = heroMapper.customPageList(pageContext, param);
        return LayuiPageFactory.createPageInfo(page);
    }

    private Page getPageContext() {
        return LayuiPageFactory.defaultPage();
    }

}

2.4. mapper

@DS("oracle_1")
public interface HeroMapper extends BaseMapper<Hero> {

    /**
     * 获取分页实体列表
     *
     * @author gblfy
     * @Date 2021-08-13
     */
    Page<HeroResult> customPageList(@Param("page") Page page, @Param("paramCondition") HeroParam paramCondition);

}

2.5. xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.gblfy.modular.order.mapper.HeroMapper">

    <!-- 通用查询映射结果 -->
    <resultMap id="BaseResultMap" type="com.gblfy.modular.order.entity.Hero">
        <id column="SNO" property="sno"/>
        <result column="USER_NAME" property="userName"/>
        <result column="AGE" property="age"/>
    </resultMap>

    <!-- 通用查询结果列 -->
    <sql id="Base_Column_List">
        SNO
        AS "sno", USER_NAME AS "userName", AGE AS "age"
    </sql>

    <select id="customPageList" resultType="com.gblfy.modular.order.model.result.HeroResult"
            parameterType="com.gblfy.modular.order.model.request.HeroParam">
        select
        <include refid="Base_Column_List"/>
        from HERO where 1 = 1
    </select>
</mapper>

三、分页失效解决方案

现象：改造完多数据源之后，分页插件就失效了。
方案：重新加载分页插件

• 分页插件
  MultiDataMyBatisPlusConfig

package com.gblfy.config.datasource;

import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @author gblfy
 * @date 2021-08-13
 */
@Configuration
public class MultiDataMyBatisPlusConfig {

    /**
     * 使用多数据源后分页插件失效，拦截器重新调用分页插件
     *
     * @return
     */
    @Bean
    public PaginationInterceptor paginationInterceptor() {
        return new PaginationInterceptor();
    }
}