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SpringCloud微服务实战——搭建企业级开发框架（二十七）（集成多数据源+Seata分布式事务+读写分离+分库分表）

读写分离：为了确保数据库产品的稳定性，很多数据库拥有双机热备功能。也就是，第一台数据库服务器，是对外提供增删改业务的生产服务器；第二台数据库服务器，主要进行读的操作。
目前有多种方式实现读写分离，一种是Mycat这种数据库中间件，需要单独部署服务，通过配置来实现读写分离，不侵入到业务代码中；还有一种是dynamic-datasource/shardingsphere-jdbc这种，需要在业务代码引入jar包进行开发。
本框架集成 dynamic-datasource（多数据源+读写分离+分库）+ druid（数据库连接池）+ seata（分布式事务）+ mybatis-plus+shardingsphere-jdbc(分库分表)， dynamic-datasource可以实现简单的分库操作，目前还不支持分表。复杂的分库分表需要用到shardingsphere-jdbc,本文参考dynamic-datasource中的实例，模拟用户下单，扣商品库存，扣用户余额操作，初步可分为订单服务+商品服务+用户服务。
一、Seata安装配置 1、我们将服务安装到CentOS环境上，所以这里我们下载tar.gz版本,下载地址:https://github.com/seata/seata/releases
SpringCloud微服务实战——搭建企业级开发框架（二十七）（集成多数据源+Seata分布式事务+读写分离+分库分表）
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2、上传到CentOS服务器，执行解压命令

tar -zxvf seata-server-1.4.1.tar.gz

3、下载Seata需要的SQL脚本，新建Seata数据库并将需要使用的数据库脚本seata-1.4.1\seata-1.4.1\script\server\db\mysql.sql刷进去
SpringCloud微服务实战——搭建企业级开发框架（二十七）（集成多数据源+Seata分布式事务+读写分离+分库分表）
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4、修改Seata配置文件，将seata服务端的注册中心和配置中心设置为Nacos
vi /bigdata/soft_home/seata/conf/registry.conf

registry { # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa type = "nacos" loadBalance = "RandomLoadBalance" loadBalanceVirtualNodes = 10nacos { application = "seata-server" serverAddr = "127.0.0.1:8848" group = "SEATA_GROUP" namespace = "" cluster = "default" username = "nacos" password = "nacos" } eureka { serviceUrl = "http://localhost:8761/eureka" application = "default" weight = "1" } redis { serverAddr = "localhost:6379" db = 0 password = "" cluster = "default" timeout = 0 } zk { cluster = "default" serverAddr = "127.0.0.1:2181" sessionTimeout = 6000 connectTimeout = 2000 username = "" password = "" } consul { cluster = "default" serverAddr = "127.0.0.1:8500" } etcd3 { cluster = "default" serverAddr = "http://localhost:2379" } sofa { serverAddr = "127.0.0.1:9603" application = "default" region = "DEFAULT_ZONE" datacenter = "DefaultDataCenter" cluster = "default" group = "SEATA_GROUP" addressWaitTime = "3000" } file { name = "file.conf" } }config { # file、nacos 、apollo、zk、consul、etcd3 type = "nacos"nacos { serverAddr = "127.0.0.1:8848" namespace = "" group = "SEATA_GROUP" username = "nacos" password = "nacos" } consul { serverAddr = "127.0.0.1:8500" } apollo { appId = "seata-server" apolloMeta = "http://192.168.1.204:8801" namespace = "application" apolloAccesskeySecret = "" } zk { serverAddr = "127.0.0.1:2181" sessionTimeout = 6000 connectTimeout = 2000 username = "" password = "" } etcd3 { serverAddr = "http://localhost:2379" } file { name = "file.conf" } }

5、在Nacos添加Seata配置文件，修改script/config-center/config.txt，将script目录上传到CentOS服务器，执行script/config-center/nacos/nacos-config.sh命令
service.vgroupMapping.gitegg_seata_tx_group=defaultservice.default.grouplist=127.0.0.1:8091store.mode=dbstore.db.url=jdbc:mysql://127.0.0.1:3306/seata?useUnicode=true store.db.user=root store.db.password=root

chmod 777 nacos-config.shsh nacos-config.sh -h 127.0.0.1 -p 8848

SpringCloud微服务实战——搭建企业级开发框架（二十七）（集成多数据源+Seata分布式事务+读写分离+分库分表）
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6、在CentOS上进去到Seata安装目录的bin目录执行命令，启动Seata服务端
nohup ./seata-server.sh -h 127.0.0.1 -p 8091 >log.out 2>1 &

如果服务器有多网卡，存在多个ip地址，-h后面一定要加可以访问的ip地址 7、在Nacos上可以看到配置文件和服务已经注册成功
SpringCloud微服务实战——搭建企业级开发框架（二十七）（集成多数据源+Seata分布式事务+读写分离+分库分表）
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SpringCloud微服务实战——搭建企业级开发框架（二十七）（集成多数据源+Seata分布式事务+读写分离+分库分表）
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二、Seata安装成功后，我们需要在微服务中集成Seata客户端 1、因为我们在微服务中使用Seata，所以，我们将Seata客户端的依赖添加在gitegg-plaform-cloud中
com.alibaba.cloud spring-cloud-starter-alibaba-seata

2、我们这里打算使用多数据源，所以这里也把动态多数据源组件Dynamic Datasource加入到gitegg-plaform-mybatis依赖中
com.baomidou dynamic-datasource-spring-boot-starter

3、配置Nacos数据库多数据源及Seata
spring: datasource: druid: stat-view-servlet: enabled: true loginUsername: admin loginPassword: 123456 dynamic: # 设置默认的数据源或者数据源组,默认值即为master primary: master # 设置严格模式,默认false不启动. 启动后在未匹配到指定数据源时候会抛出异常,不启动则使用默认数据源. strict: false # 开启seata代理，开启后默认每个数据源都代理，如果某个不需要代理可单独关闭 seata: true #支持XA及AT模式,默认AT seata-mode: AT druid: initialSize: 1 minIdle: 3 maxActive: 20 # 配置获取连接等待超时的时间 maxWait: 60000 # 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 timeBetweenEvictionRunsMillis: 60000 # 配置一个连接在池中最小生存的时间，单位是毫秒 minEvictableIdleTimeMillis: 30000 validationQuery: select 'x' testWhileIdle: true testOnBorrow: false testOnReturn: false # 打开PSCache，并且指定每个连接上PSCache的大小 poolPreparedStatements: true maxPoolPreparedStatementPerConnectionSize: 20 # 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙 filters: config,stat,slf4j # 通过connectProperties属性来打开mergeSql功能；慢SQL记录 connectionProperties: druid.stat.mergeSql=true; druid.stat.slowSqlMillis=5000; # 合并多个DruidDataSource的监控数据 useGlobalDataSourceStat: true datasource: master: url: jdbc:mysql://127.0.0.1/gitegg_cloud?zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=utf8&all owMultiQueries=true&serverTimezone=Asia/Shanghai username: root password: root mall_user: url: jdbc:mysql://127.0.0.1/gitegg_cloud_mall_user?zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=utf8&allowMultiQueries=true&serverTimezone=Asia/Shanghai username: root password: root mall_goods: url: jdbc:mysql://127.0.0.1/gitegg_cloud_mall_goods?zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=utf8&allowMultiQueries=true&serverTimezone=Asia/Shanghai username: root password: root mall_order: url: jdbc:mysql://127.0.0.1/gitegg_cloud_mall_order?zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=utf8&allowMultiQueries=true&serverTimezone=Asia/Shanghai username: root password: root mall_pay: url: jdbc:mysql://127.0.0.1/gitegg_cloud_mall_pay?zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=utf8&alowMultiQueries=true&serverTimezone=Asia/Shanghai username: root password: root seata: enabled: true application-id: ${spring.application.name} tx-service-group: gitegg_seata_tx_group # 一定要是false enable-auto-data-source-proxy: false service: vgroup-mapping: #key与上面的gitegg_seata_tx_group的值对应 gitegg_seata_tx_group: default config: type: nacos nacos: namespace: serverAddr: 127.0.0.1:8848 group: SEATA_GROUP userName: "nacos" password: "nacos" registry: type: nacos nacos: #seata服务端(TC)在nacos中的应用名称 application: seata-server server-addr: 127.0.0.1:8848 namespace: userName: "nacos" password: "nacos"

三、数据库表设计 这里参考Dynamic Datasource官方提供的示例项目,并结合电商项目数据库设计,新建四个数据库，gitegg_cloud_mall_goods（商品数据库），gitegg_cloud_mall_order（订单数据库），gitegg_cloud_mall_pay（支付数据库）,gitegg_cloud_mall_user（账户数据库）四个数据库，下面是具体表结构和简要说明:
1、商品数据库表设计 表设计：
  • 商品分类表：t_mall_goods_category
  • 商品品牌表： t_mall_goods_brand
  • 分类品牌关联关系表：t_mall_goods_category_brand
  • 商品规格参数组表： t_mall_goods_spec_group
  • 商品规格参数表：t_mall_goods_spec_param
  • 商品SPU表： t_mall_goods_spu
  • 商品SPU详情表： t_mall_goods_spu_detail
  • 商品SKU表： t_mall_goods_sku
关系：
  • 一个分类有多个品牌，一个品牌属于多个分类，所以是多对多
  • 一个分类有多个规格组，一个规格组有多个规格参数，所以是一对多
  • 一个分类下有多个SPU，所以是一对多
  • 一个品牌下有多个SPU，所以是一对多
  • 一个SPU下有多个SKU，所以是一对多
DROP TABLE IF EXISTS `t_mall_goods_brand`; CREATE TABLE `t_mall_goods_brand`( `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '品牌id', `tenant_id` bigint(20) NOT NULL DEFAULT 0 COMMENT '租户id', `name` varchar(64) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '品牌名称', `image` varchar(256) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT '' COMMENT '品牌图片地址', `letter` char(1) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT '' COMMENT '品牌的首字母', `create_time` datetime(0) NULL DEFAULT NULL COMMENT '创建时间', `creator` bigint(20) NULL DEFAULT NULL COMMENT '创建者', `update_time` datetime(0) NULL DEFAULT NULL COMMENT '更新时间', `operator` bigint(20) NULL DEFAULT NULL COMMENT '更新者', `del_flag` tinyint(2) NULL DEFAULT 0 COMMENT '1:删除 0:不删除', PRIMARY KEY (`id`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = '品牌表，一个品牌下有多个商品（spu），一对多关系' ROW_FORMAT = DYNAMIC; -- ---------------------------- -- Table structure for t_mall_goods_brand_category -- ---------------------------- DROP TABLE IF EXISTS `t_mall_goods_brand_category`; CREATE TABLE `t_mall_goods_brand_category`( `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '品牌id', `tenant_id` bigint(20) NOT NULL DEFAULT 0 COMMENT '租户id', `brand_id` bigint(20) NOT NULL COMMENT '品牌id', `category_id` bigint(20) NOT NULL COMMENT '商品类目id', `create_time` datetime(0) NULL DEFAULT NULL COMMENT '创建时间', `creator` bigint(20) NULL DEFAULT NULL COMMENT '创建者', `update_time` datetime(0) NULL DEFAULT NULL COMMENT '更新时间', `operator` bigint(20) NULL DEFAULT NULL COMMENT '更新者', `del_flag` tinyint(2) NULL DEFAULT 0 COMMENT '1:删除 0:不删除', PRIMARY KEY (`id`) USING BTREE, INDEX `key_tenant_id`(`tenant_id`) USING BTREE, INDEX `key_category_id`(`category_id`) USING BTREE, INDEX `key_brand_id`(`brand_id`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = '商品分类和品牌的中间表，两者是多对多关系' ROW_FORMAT = DYNAMIC; -- ---------------------------- -- Table structure for t_mall_goods_category -- ---------------------------- DROP TABLE IF EXISTS `t_mall_goods_category`; CREATE TABLE `t_mall_goods_category`( `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '类目id', `tenant_id` bigint(20) NOT NULL DEFAULT 0 COMMENT '租户id', `name` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '类目名称', `parent_id` bigint(20) NOT NULL COMMENT '父类目id,顶级类目填0', `is_parent` tinyint(2) NOT NULL COMMENT '是否为父节点，0为否，1为是', `sort` tinyint(2) NOT NULL COMMENT '排序指数，越小越靠前', `comments` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '备注', `create_time` datetime(0) NULL DEFAULT NULL COMMENT '创建时间', `creator` bigint(20) NULL DEFAULT NULL COMMENT '创建者', `update_time` datetime(0) NULL DEFAULT NULL COMMENT '更新时间', `operator` bigint(20) NULL DEFAULT NULL COMMENT '更新者', `del_flag` tinyint(2) NULL DEFAULT 0 COMMENT '1:删除 0:不删除', PRIMARY KEY (`id`) USING BTREE, INDEX `key_parent_id`(`parent_id`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = '商品类目表，类目和商品(spu)是一对多关系，类目与品牌是多对多关系' ROW_FORMAT = DYNAMIC; -- ---------------------------- -- Table structure for t_mall_goods_sku -- ---------------------------- DROP TABLE IF EXISTS `t_mall_goods_sku`; CREATE TABLE `t_mall_goods_sku`( `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键', `tenant_id` bigint(20) NOT NULL DEFAULT 0 COMMENT '租户id', `spu_id` bigint(20) NOT NULL COMMENT 'spu id', `title` varchar(256) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '商品标题', `images` varchar(1024) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT '' COMMENT '商品的图片，多个图片以‘,’分割', `stock` int(8) UNSIGNED NULL DEFAULT 0 COMMENT '库存', `price` decimal(10, 2) NOT NULL DEFAULT 0.00 COMMENT '销售价格', `indexes` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT '' COMMENT '特有规格属性在spu属性模板中的对应下标组合', `own_spec` varchar(1024) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT '' COMMENT 'sku的特有规格参数键值对，json格式，反序列化时请使用linkedHashMap，保证有序', `status` tinyint(1) NOT NULL DEFAULT 1 COMMENT '是否有效，0无效，1有效', `create_time` datetime(0) NULL DEFAULT NULL COMMENT '创建时间', `creator` bigint(20) NULL DEFAULT NULL COMMENT '创建者', `update_time` datetime(0) NULL DEFAULT NULL COMMENT '更新时间', `operator` bigint(20) NULL DEFAULT NULL COMMENT '更新者', `del_flag` tinyint(2) NULL DEFAULT 0 COMMENT '1:删除 0:不删除', PRIMARY KEY (`id`) USING BTREE, INDEX `key_spu_id`(`spu_id`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 3 CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = 'sku表,该表表示具体的商品实体' ROW_FORMAT = DYNAMIC; -- ---------------------------- -- Table structure for t_mall_goods_spec_group -- ---------------------------- DROP TABLE IF EXISTS `t_mall_goods_spec_group`; CREATE TABLE `t_mall_goods_spec_group`( `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键', `tenant_id` bigint(20) NOT NULL DEFAULT 0 COMMENT '租户id', `category_id` bigint(20) NOT NULL COMMENT '商品分类id，一个分类下有多个规格组', `name` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '规格组的名称', `create_time` datetime(0) NULL DEFAULT NULL COMMENT '创建时间', `creator` bigint(20) NULL DEFAULT NULL COMMENT '创建者', `update_time` datetime(0) NULL DEFAULT NULL COMMENT '更新时间', `operator` bigint(20) NULL DEFAULT NULL COMMENT '更新者', `del_flag` tinyint(2) NULL DEFAULT 0 COMMENT '1:删除 0:不删除', PRIMARY KEY (`id`) USING BTREE, INDEX `key_tenant_id`(`tenant_id`) USING BTREE, INDEX `key_category_id`(`category_id`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = '规格参数的分组表，每个商品分类下有多个规格参数组' ROW_FORMAT = DYNAMIC; -- ---------------------------- -- Table structure for t_mall_goods_spec_param -- ---------------------------- DROP TABLE IF EXISTS `t_mall_goods_spec_param`; CREATE TABLE `t_mall_goods_spec_param`( `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键', `tenant_id` bigint(20) NOT NULL DEFAULT 0 COMMENT '租户id', `category_id` bigint(20) NOT NULL COMMENT '商品分类id', `group_id` bigint(20) NOT NULL COMMENT '所属组的id', `name` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '参数名', `numeric` tinyint(1) NOT NULL COMMENT '是否是数字类型参数，true或false', `unit` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT '' COMMENT '数字类型参数的单位，非数字类型可以为空', `generic` tinyint(1) NOT NULL COMMENT '是否是sku通用属性，true或false', `searching` tinyint(1) NOT NULL COMMENT '是否用于搜索过滤，true或false', `segments` varchar(1024) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT '' COMMENT '数值类型参数，如果需要搜索，则添加分段间隔值，如CPU频率间隔：0.5-1.0', `create_time` datetime(0) NULL DEFAULT NULL COMMENT '创建时间', `creator` bigint(20) NULL DEFAULT NULL COMMENT '创建者', `update_time` datetime(0) NULL DEFAULT NULL COMMENT '更新时间', `operator` bigint(20) NULL DEFAULT NULL COMMENT '更新者', `del_flag` tinyint(2) NULL DEFAULT 0 COMMENT '1:删除 0:不删除', PRIMARY KEY (`id`) USING BTREE, INDEX `key_tenant_id`(`tenant_id`) USING BTREE, INDEX `key_category_id`(`category_id`) USING BTREE, INDEX `key_group_id`(`group_id`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = '规格参数组下的参数名' ROW_FORMAT = DYNAMIC; -- ---------------------------- -- Table structure for t_mall_goods_spu -- ---------------------------- DROP TABLE IF EXISTS `t_mall_goods_spu`; CREATE TABLE `t_mall_goods_spu`( `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键', `tenant_id` bigint(20) NOT NULL DEFAULT 0 COMMENT '租户id', `brand_id` bigint(20) NOT NULL COMMENT '商品所属品牌id', `category_id` bigint(20) NOT NULL COMMENT '商品分类id', `name` varchar(256) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL DEFAULT '' COMMENT '商品名称', `sub_title` varchar(256) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT '' COMMENT '副标题，一般是促销信息', `on_sale` tinyint(2) NOT NULL DEFAULT 1 COMMENT '是否上架，0下架，1上架', `price` decimal(10, 2) NOT NULL DEFAULT 0.00 COMMENT '售价', `use_spec` tinyint(2) NOT NULL DEFAULT 1 COMMENT '是否使用规格：0=不使用，1=使用', `spec_groups` text CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '商品规格组', `goods_stock` int(11) NOT NULL DEFAULT 0 COMMENT '商品库存', `virtual_sales` int(11) NOT NULL DEFAULT 0 COMMENT '虚拟销售数量', `confine_count` int(11) NOT NULL DEFAULT -1 COMMENT '购物数量限制', `pieces` int(11) NOT NULL DEFAULT 0 COMMENT '满件包邮', `forehead` decimal(10, 2) NOT NULL DEFAULT 0.00 COMMENT '满额包邮', `freight_id` int(11) NOT NULL COMMENT '运费模板ID', `give_integral` int(11) NOT NULL DEFAULT 0 COMMENT '赠送积分', `give_integral_type` tinyint(2) NOT NULL DEFAULT 1 COMMENT '赠送积分类型1固定值 2百分比', `deductible_integral` decimal(10, 2) NOT NULL DEFAULT 0.00 COMMENT '可抵扣积分', `deductible_integral_type` tinyint(2) NOT NULL DEFAULT 1 COMMENT '可抵扣积分类型1固定值 2百分比', `accumulative` tinyint(2) NOT NULL DEFAULT 0 COMMENT '允许多件累计折扣 0否 1是', `individual_share` tinyint(2) NOT NULL DEFAULT 0 COMMENT '是否单独分销设置：0否 1是', `share_setting_type` tinyint(2) NOT NULL DEFAULT 0 COMMENT '分销设置类型 0普通设置 1详细设置', `share_commission_type` tinyint(1) NOT NULL DEFAULT 0 COMMENT '佣金配比 0 固定金额 1 百分比', `membership_price` tinyint(2) NOT NULL DEFAULT 0 COMMENT '是否享受会员价购买', `membership_price_single` tinyint(2) NOT NULL DEFAULT 0 COMMENT '是否单独设置会员价', `share_image` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL DEFAULT '' COMMENT '自定义分享图片', `share_title` varchar(65) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL DEFAULT '' COMMENT '自定义分享标题', `is_default_services` tinyint(2) NOT NULL DEFAULT 1 COMMENT '默认服务 0否1是', `sort` int(11) NOT NULL DEFAULT 100 COMMENT '排序', `create_time` datetime(0) NULL DEFAULT NULL COMMENT '创建时间', `creator` bigint(20) NULL DEFAULT NULL COMMENT '创建者', `update_time` datetime(0) NULL DEFAULT NULL COMMENT '更新时间', `operator` bigint(20) NULL DEFAULT NULL COMMENT '更新者', `del_flag` tinyint(2) NULL DEFAULT 0 COMMENT '1:删除 0:不删除', PRIMARY KEY (`id`) USING BTREE, INDEX `key_tenant_id`(`tenant_id`) USING BTREE, INDEX `key_category_id`(`category_id`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = 'spu表，该表描述的是一个抽象性的商品' ROW_FORMAT = DYNAMIC; -- ---------------------------- -- Table structure for t_mall_goods_spu_detail -- ---------------------------- DROP TABLE IF EXISTS `t_mall_goods_spu_detail`; CREATE TABLE `t_mall_goods_spu_detail`( `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键', `tenant_id` bigint(20) NOT NULL DEFAULT 0 COMMENT '租户id', `spu_id` bigint(20) NOT NULL, `description` text CHARACTER SET utf8 COLLATE utf8_general_ci NULL COMMENT '商品描述信息', `generic_spec` varchar(2048) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL DEFAULT '' COMMENT '通用规格参数数据', `special_spec` varchar(1024) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '特有规格参数及可选值信息，json格式', `packing_list` varchar(1024) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT '' COMMENT '包装清单', `after_service` varchar(1024) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT '' COMMENT '售后服务', `create_time` datetime(0) NULL DEFAULT NULL COMMENT '创建时间', `creator` bigint(20) NULL DEFAULT NULL COMMENT '创建者', `update_time` datetime(0) NULL DEFAULT NULL COMMENT '更新时间', `operator` bigint(20) NULL DEFAULT NULL COMMENT '更新者', `del_flag` tinyint(2) NULL DEFAULT 0 COMMENT '1:删除 0:不删除', PRIMARY KEY (`id`) USING BTREE, INDEX `key_tenant_id`(`tenant_id`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = DYNAMIC; -- ---------------------------- -- Table structure for undo_log -- ---------------------------- DROP TABLE IF EXISTS `undo_log`; CREATE TABLE `undo_log`( `branch_id` bigint(20) NOT NULL COMMENT 'branch transaction id', `xid` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT 'global transaction id', `context` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT 'undo_log context,such as serialization', `rollback_info` longblob NOT NULL COMMENT 'rollback info', `log_status` int(11) NOT NULL COMMENT '0:normal status,1:defense status', `log_created` datetime(6) NOT NULL COMMENT 'create datetime', `log_modified` datetime(6) NOT NULL COMMENT 'modify datetime', UNIQUE INDEX `ux_undo_log`(`xid`, `branch_id`) USING BTREE ) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = 'AT transaction mode undo table' ROW_FORMAT = Dynamic; SET FOREIGN_KEY_CHECKS = 1;

2、订单数据库表设计
-- ---------------------------- -- Table structure for t_mall_order -- ---------------------------- DROP TABLE IF EXISTS `t_mall_order`; CREATE TABLE `t_mall_order`( `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键', `tenant_id` bigint(20) NOT NULL DEFAULT 0 COMMENT '租户id', `user_id` bigint(20) NOT NULL COMMENT '主键', `store_id` int(11) NOT NULL DEFAULT 0 COMMENT '店铺id', `order_no` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT '' COMMENT '订单号', `total_price` decimal(10, 2) NULL DEFAULT NULL COMMENT '订单总金额(含运费)', `total_pay_price` decimal(10, 2) NOT NULL COMMENT '实际支付总费用(含运费）', `express_original_price` decimal(10, 2) NOT NULL COMMENT '运费', `express_price` decimal(10, 2) NULL DEFAULT NULL COMMENT '修改后运费', `total_goods_original_price` decimal(10, 2) NULL DEFAULT NULL COMMENT '订单商品总金额', `total_goods_price` decimal(10, 2) NULL DEFAULT NULL COMMENT '优惠后订单商品总金额', `store_discount_price` decimal(10, 2) NULL DEFAULT 0.00 COMMENT '商家改价优惠', `member_discount_price` decimal(10, 2) NULL DEFAULT NULL COMMENT '会员优惠价格', `coupon_id` int(11) NULL DEFAULT NULL COMMENT '优惠券id', `coupon_discount_price` decimal(10, 2) NULL DEFAULT NULL COMMENT '优惠券优惠金额', `integral` int(11) NULL DEFAULT NULL COMMENT '使用的积分数量', `integral_deduction_price` decimal(10, 2) NULL DEFAULT NULL COMMENT '积分抵扣金额', `name` varchar(65) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT '' COMMENT '收件人姓名', `mobile` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT '' COMMENT '收件人手机号', `address` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT '' COMMENT '收件人地址', `comments` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT '' COMMENT '用户订单备注', `order_form` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL COMMENT '自定义表单（JSON）', `leaving_message` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT '' COMMENT '留言', `store_comments` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT '' COMMENT '商家订单备注', `pay_status` tinyint(2) NULL DEFAULT 0 COMMENT '是否支付：0.未支付 1.已支付', `pay_type` tinyint(2) NULL DEFAULT 1 COMMENT '支付方式：1.在线支付 2.货到付款 3.余额支付', `pay_time` timestamp(0) NULL DEFAULT '0000-00-00 00:00:00' COMMENT '支付时间', `deliver_status` tinyint(2) NULL DEFAULT 0 COMMENT '是否发货：0.未发货 1.已发货', `deliver_time` timestamp(0) NULL DEFAULT '0000-00-00 00:00:00' COMMENT '发货时间', `express` varchar(65) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT '' COMMENT '物流公司', `express_no` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT '' COMMENT '物流订单号', `confirm_receipt` tinyint(2) NULL DEFAULT 0 COMMENT '收货状态：0.未收货 1.已收货', `confirm_receipt_time` timestamp(0) NULL DEFAULT '0000-00-00 00:00:00' COMMENT '确认收货时间', `cancel_status` tinyint(2) NULL DEFAULT 0 COMMENT '订单取消状态：0.未取消 1.已取消 2.申请取消', `cancel_time` timestamp(0) NULL DEFAULT '0000-00-00 00:00:00' COMMENT '订单取消时间', `recycle_status` tinyint(2) NULL DEFAULT 0 COMMENT '是否加入回收站 0.否 1.是', `offline` tinyint(2) NULL DEFAULT 0 COMMENT '是否到店自提：0.否 1.是', `offline_code` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT '' COMMENT '核销码', `verifier_id` int(11) NULL DEFAULT 0 COMMENT '核销员ID', `verifier_store_id` int(11) NULL DEFAULT 0 COMMENT '自提门店ID', `support_pay_types` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL COMMENT '支持的支付方式', `evaluation_status` tinyint(2) NULL DEFAULT 0 COMMENT '是否评价 0.否 1.是', `evaluation_time` timestamp(0) NULL DEFAULT '0000-00-00 00:00:00', `after_sales_out` tinyint(2) NULL DEFAULT 0 COMMENT '是否过售后时间 0.否 1.是', `after_sales_status` tinyint(2) NULL DEFAULT 0 COMMENT '是否申请售后 0.否 1.是', `status` tinyint(2) NULL DEFAULT 1 COMMENT '订单状态 1.已完成 0.进行中', `auto_cancel_time` timestamp(0) NULL DEFAULT NULL COMMENT '自动取消时间', `auto_confirm_verifier_time` timestamp(0) NULL DEFAULT NULL COMMENT '自动确认收货时间', `auto_after_sales_time` timestamp(0) NULL DEFAULT NULL COMMENT '自动售后时间', `create_time` datetime(0) NULL DEFAULT NULL COMMENT '创建时间', `creator` bigint(20) NULL DEFAULT NULL COMMENT '创建者', `update_time` datetime(0) NULL DEFAULT NULL COMMENT '更新时间', `operator` bigint(20) NULL DEFAULT NULL COMMENT '更新者', `del_flag` tinyint(1) NOT NULL DEFAULT 0 COMMENT '1:删除 0:不删除', PRIMARY KEY (`id`) USING BTREE, INDEX `INDEX_TENANT_ID`(`tenant_id`) USING BTREE, INDEX `INDEX_USER_ID`(`user_id`) USING BTREE, INDEX `INDEX_STORE_ID`(`store_id`) USING BTREE, INDEX `INDEX_ORDER_NO`(`order_no`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 10 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = DYNAMIC; -- ---------------------------- -- Table structure for t_mall_order_sku -- ---------------------------- DROP TABLE IF EXISTS `t_mall_order_sku`; CREATE TABLE `t_mall_order_sku`( `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键', `tenant_id` bigint(20) NOT NULL DEFAULT 0 COMMENT '租户id', `order_id` bigint(20) NOT NULL COMMENT '订单id', `goods_sku_id` bigint(20) NULL DEFAULT NULL COMMENT '购买商品id', `goods_sku_number` int(11) NULL DEFAULT NULL COMMENT '购买商品数量', `goods_sku_price` decimal(10, 2) NULL DEFAULT NULL COMMENT '商品单价', `total_original_price` decimal(10, 2) NULL DEFAULT NULL COMMENT '商品总价', `total_price` decimal(10, 2) NULL DEFAULT NULL COMMENT '优惠后商品总价', `member_discount_price` decimal(10, 2) NULL DEFAULT NULL COMMENT '会员优惠金额', `store_discount_price` decimal(10, 2) NULL DEFAULT 0.00 COMMENT '商家改价优惠', `goods_sku_info` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL COMMENT '购买商品信息', `refund_status` tinyint(1) NULL DEFAULT 0 COMMENT '是否退款', `after_sales_status` tinyint(1) NULL DEFAULT 0 COMMENT '售后状态 0--未售后 1--售后中 2--售后结束', `create_time` datetime(0) NULL DEFAULT NULL COMMENT '创建时间', `creator` bigint(20) NULL DEFAULT NULL COMMENT '创建者', `update_time` datetime(0) NULL DEFAULT NULL COMMENT '更新时间', `operator` bigint(20) NULL DEFAULT NULL COMMENT '更新者', `del_flag` tinyint(1) NOT NULL DEFAULT 0 COMMENT '1:删除 0:不删除', PRIMARY KEY (`id`) USING BTREE, INDEX `INDEX_TENANT_ID`(`tenant_id`) USING BTREE, INDEX `INDEX_ORDER_ID`(`order_id`) USING BTREE, INDEX `INDEX_GOODS_SKU_ID`(`goods_sku_id`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 15 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = DYNAMIC; -- ---------------------------- -- Table structure for undo_log -- ---------------------------- DROP TABLE IF EXISTS `undo_log`; CREATE TABLE `undo_log`( `branch_id` bigint(20) NOT NULL COMMENT 'branch transaction id', `xid` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT 'global transaction id', `context` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT 'undo_log context,such as serialization', `rollback_info` longblob NOT NULL COMMENT 'rollback info', `log_status` int(11) NOT NULL COMMENT '0:normal status,1:defense status', `log_created` datetime(6) NOT NULL COMMENT 'create datetime', `log_modified` datetime(6) NOT NULL COMMENT 'modify datetime', UNIQUE INDEX `ux_undo_log`(`xid`, `branch_id`) USING BTREE ) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = 'AT transaction mode undo table' ROW_FORMAT = Dynamic; SET FOREIGN_KEY_CHECKS = 1;

3、支付数据库表设计
DROP TABLE IF EXISTS `t_mall_pay_record`; CREATE TABLE `t_mall_pay_record`( `id` bigint(20) NOT NULL AUTO_INCREMENT, `tenant_id` bigint(20) NOT NULL DEFAULT 0 COMMENT '租户id', `user_id` bigint(20) NOT NULL COMMENT '用户id', `order_no` varchar(32) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '0', `amount` decimal(9, 2) NOT NULL, `pay_status` tinyint(2) NOT NULL DEFAULT 0 COMMENT '支付状态：0=未支付，1=已支付, 2=已退款', `pay_type` tinyint(2) NOT NULL DEFAULT 3 COMMENT '支付方式：1=微信支付，2=货到付款，3=余额支付，4=支付宝支付,5=银行卡支付', `title` varchar(128) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT '', `refund` decimal(9, 2) NOT NULL DEFAULT 0.00 COMMENT '已退款金额', `comments` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '' COMMENT '备注', `create_time` datetime(0) NULL DEFAULT NULL COMMENT '创建时间', `creator` bigint(20) NULL DEFAULT NULL COMMENT '创建者', `update_time` datetime(0) NULL DEFAULT NULL COMMENT '更新时间', `operator` bigint(20) NULL DEFAULT NULL COMMENT '更新者', `del_flag` tinyint(2) NULL DEFAULT 0 COMMENT '1:删除 0:不删除', PRIMARY KEY (`id`) USING BTREE, INDEX `INDEX_TENANT_ID`(`tenant_id`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 9 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = DYNAMIC; -- ---------------------------- -- Table structure for undo_log -- ---------------------------- DROP TABLE IF EXISTS `undo_log`; CREATE TABLE `undo_log`( `branch_id` bigint(20) NOT NULL COMMENT 'branch transaction id', `xid` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT 'global transaction id', `context` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT 'undo_log context,such as serialization', `rollback_info` longblob NOT NULL COMMENT 'rollback info', `log_status` int(11) NOT NULL COMMENT '0:normal status,1:defense status', `log_created` datetime(6) NOT NULL COMMENT 'create datetime', `log_modified` datetime(6) NOT NULL COMMENT 'modify datetime', UNIQUE INDEX `ux_undo_log`(`xid`, `branch_id`) USING BTREE ) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = 'AT transaction mode undo table' ROW_FORMAT = Dynamic; SET FOREIGN_KEY_CHECKS = 1;

4、账户数据库表设计
-- ---------------------------- -- Table structure for t_mall_user_account -- ---------------------------- DROP TABLE IF EXISTS `t_mall_user_account`; CREATE TABLE `t_mall_user_account`( `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键', `tenant_id` bigint(20) NOT NULL DEFAULT 0 COMMENT '租户id', `user_id` bigint(20) NOT NULL COMMENT '用户id', `integral` bigint(20) NOT NULL DEFAULT 0 COMMENT '积分', `balance` decimal(10, 2) NOT NULL DEFAULT 0.00 COMMENT '余额', `account_status` tinyint(2) NULL DEFAULT 1 COMMENT '账户状态 \'0\'禁用，\'1\' 启用', `comments` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '备注', `create_time` datetime(0) NULL DEFAULT NULL COMMENT '创建时间', `creator` bigint(20) NULL DEFAULT NULL COMMENT '创建者', `update_time` datetime(0) NULL DEFAULT NULL COMMENT '更新时间', `operator` bigint(20) NULL DEFAULT NULL COMMENT '更新者', `del_flag` tinyint(2) NULL DEFAULT 0 COMMENT '1:删除 0:不删除', PRIMARY KEY (`id`) USING BTREE, INDEX `INDEX_TENANT_ID`(`tenant_id`) USING BTREE, INDEX `INDEX_USER_ID`(`user_id`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 2 CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = '用户账户表' ROW_FORMAT = DYNAMIC; -- ---------------------------- -- Table structure for t_mall_user_balance_record -- ---------------------------- DROP TABLE IF EXISTS `t_mall_user_balance_record`; CREATE TABLE `t_mall_user_balance_record`( `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键', `tenant_id` bigint(20) NOT NULL DEFAULT 0 COMMENT '租户id', `user_id` bigint(20) NOT NULL COMMENT '用户id', `type` tinyint(2) NOT NULL COMMENT '类型：1=收入，2=支出', `amount` decimal(10, 2) NOT NULL COMMENT '变动金额', `comments` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '' COMMENT '备注', `create_time` datetime(0) NULL DEFAULT NULL COMMENT '创建时间', `creator` bigint(20) NULL DEFAULT NULL COMMENT '创建者', `update_time` datetime(0) NULL DEFAULT NULL COMMENT '更新时间', `operator` bigint(20) NULL DEFAULT NULL COMMENT '更新者', `del_flag` tinyint(2) NULL DEFAULT 0 COMMENT '1:删除 0:不删除', PRIMARY KEY (`id`) USING BTREE, INDEX `INDEX_TENANT_ID`(`tenant_id`) USING BTREE, INDEX `INDEX_USER_ID`(`user_id`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 17 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = DYNAMIC; -- ---------------------------- -- Table structure for undo_log -- ---------------------------- DROP TABLE IF EXISTS `undo_log`; CREATE TABLE `undo_log`( `branch_id` bigint(20) NOT NULL COMMENT 'branch transaction id', `xid` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT 'global transaction id', `context` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT 'undo_log context,such as serialization', `rollback_info` longblob NOT NULL COMMENT 'rollback info', `log_status` int(11) NOT NULL COMMENT '0:normal status,1:defense status', `log_created` datetime(6) NOT NULL COMMENT 'create datetime', `log_modified` datetime(6) NOT NULL COMMENT 'modify datetime', UNIQUE INDEX `ux_undo_log`(`xid`, `branch_id`) USING BTREE ) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = 'AT transaction mode undo table' ROW_FORMAT = Dynamic; SET FOREIGN_KEY_CHECKS = 1;

5、上面的脚本中，每个数据都需要刷入了Seata分布式事务回滚需要的表脚本,在下载Seata包的seata-1.4.1\seata-1.4.1\script\client\at\db路径下
-- ---------------------------- -- Table structure for undo_log -- ---------------------------- DROP TABLE IF EXISTS `undo_log`; CREATE TABLE `undo_log`( `branch_id` bigint(20) NOT NULL COMMENT 'branch transaction id', `xid` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT 'global transaction id', `context` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT 'undo_log context,such as serialization', `rollback_info` longblob NOT NULL COMMENT 'rollback info', `log_status` int(11) NOT NULL COMMENT '0:normal status,1:defense status', `log_created` datetime(6) NOT NULL COMMENT 'create datetime', `log_modified` datetime(6) NOT NULL COMMENT 'modify datetime', UNIQUE INDEX `ux_undo_log`(`xid`, `branch_id`) USING BTREE ) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = 'AT transaction mode undo table' ROW_FORMAT = Dynamic; SET FOREIGN_KEY_CHECKS = 1;

三、测试代码 在GitEgg-Cloud工程下，新建gitegg-mall和gitegg-mall-client子工程，client子工程用于fegin调用
1、订单服务
@DS("mall_order")//每一层都需要使用多数据源注解切换所选择的数据库 @Transactional(propagation = Propagation.REQUIRES_NEW) @GlobalTransactional //重点 第一个开启事务的需要添加seata全局事务注解 @Override public void order(List orderSkuList, Long userId) {//获取商品的详细信息 Result goodsSkuResult = mallGoodsFeign.queryByIds(orderSkuList.stream() .map(OrderSkuDTO::getGoodsSkuId) .collect(Collectors.toList())); List resultSkuList = (List) goodsSkuResult.getData(); List goodsSkuList = new ArrayList<>(); if(CollectionUtils.isEmpty(resultSkuList) || resultSkuList.size() != orderSkuList.size()) { throw new BusinessException("商品不存在"); } else { resultSkuList.stream().forEach(goodsSku -> { GoodsSkuDTO goodsSkuDTO = BeanUtil.fillBeanWithMap((Map) goodsSku, new GoodsSkuDTO(), false); goodsSkuList.add(goodsSkuDTO); }); }//扣商品库存 List reduceStockDtoList = orderSkuList.stream() .map(t -> new ReduceStockDTO(t.getGoodsSkuId(),t.getGoodsSkuNumber())) .collect(Collectors.toList()); mallGoodsFeign.reduceStock(reduceStockDtoList); ////支付 BigDecimal totalMoney = new BigDecimal(0.0d); for(OrderSkuDTO orderSkuDTO: orderSkuList) { for(GoodsSkuDTO goodsSkuDTO: goodsSkuList) { if(orderSkuDTO.getGoodsSkuId().equals(goodsSkuDTO.getId())) { BigDecimal skuNumber = new BigDecimal(orderSkuDTO.getGoodsSkuNumber()); totalMoney = totalMoney.add(goodsSkuDTO.getPrice().multiply(skuNumber)); break; } } }mallPayFeign.pay(userId, totalMoney); //主订单表插入数据 Order order = new Order(); order.setTotalPrice(totalMoney); order.setTotalPayPrice(totalMoney); order.setExpressOriginalPrice(totalMoney); order.setStatus(1); order.setUserId(userId); this.save(order); //子订单表插入数据 ArrayList orderSkus = new ArrayList<>(); orderSkuList.forEach(payOrderReq -> { OrderSku orderSku = new OrderSku(); orderSku.setOrderId(order.getId()); orderSku.setGoodsSkuNumber(payOrderReq.getGoodsSkuNumber()); orderSku.setGoodsSkuId(payOrderReq.getGoodsSkuId()); for(GoodsSkuDTO goodsSkuDTO : goodsSkuList) { if(payOrderReq.getGoodsSkuId().equals(goodsSkuDTO.getId())) { orderSku.setGoodsSkuPrice(goodsSkuDTO.getPrice()); break; } } orderSkus.add(orderSku); }); orderSkuService.saveBatch(orderSkus); }
2、商品服务
@DS("mall_goods") @Override public List queryGoodsByIds(List idList) { return goodsSkuMapper.queryGoodsByIds(idList); }/** * 事务传播特性设置为 REQUIRES_NEW 开启新的事务重要！！！！一定要使用REQUIRES_NEW */ @DS("mall_goods") @Transactional(propagation = Propagation.REQUIRES_NEW) @Override public void reduceStock(List reduceStockReqList) { reduceStockReqList.forEach(sku -> { Integer line = goodsSkuMapper.reduceStock(sku.getNumber(), sku.getSkuId()); if(line == null || line == 0) { throw new BusinessException("商品不存在或库存不足"); } }); }

3、支付服务
/** * 事务传播特性设置为 REQUIRES_NEW 开启新的事务重要！！！！一定要使用REQUIRES_NEW */ @DS("mall_pay") @Transactional(propagation = Propagation.REQUIRES_NEW) @Override public Long pay(Long userId, BigDecimal payMoney) {//调用gitegg-mall-user的账户扣除余额接口 mallUserFeign.accountDeduction(userId, payMoney); // 插入支付记录表 PayRecord payRecord = new PayRecord(); payRecord.setUserId(userId); payRecord.setAmount(payMoney); payRecord.setPayStatus(GitEggConstant.Number.ONE); payRecord.setPayType(GitEggConstant.Number.FIVE); payRecordService.save(payRecord); return payRecord.getId(); }

4、账户服务
/** * 事务传播特性设置为 REQUIRES_NEW 开启新的事务重要！！！！一定要使用REQUIRES_NEW */ @DS("mall_user") @Transactional(propagation = Propagation.REQUIRES_NEW) @Override public void deduction(Long userId, BigDecimal amountOfMoney) { //查看账户余额是否满足扣款 QueryUserAccountDTO queryUserAccountDTO = new QueryUserAccountDTO(); queryUserAccountDTO.setUserId(userId); UserAccountDTO userAccount = this.queryUserAccount(queryUserAccountDTO); if(userAccount == null) { throw new BusinessException("用户未开通个人账户"); }if(amountOfMoney.compareTo(userAccount.getBalance()) > GitEggConstant.Number.ZERO) { throw new BusinessException("账户余额不足"); } //执行扣款 userAccountMapper.deductionById(userAccount.getId(), amountOfMoney); //加入账户变动记录 UserBalanceRecord userBalanceRecord = new UserBalanceRecord(); userBalanceRecord.setUserId(userId); userBalanceRecord.setAmount(amountOfMoney); userBalanceRecord.setType(GitEggConstant.Number.TWO); userBalanceRecordService.save(userBalanceRecord); }

5、使用Postman测试，发送请求，然后查看数据库是否都增加了数据，正常情况下，几个数据库的表都有新增或更新
SpringCloud微服务实战——搭建企业级开发框架（二十七）（集成多数据源+Seata分布式事务+读写分离+分库分表）
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SpringCloud微服务实战——搭建企业级开发框架（二十七）（集成多数据源+Seata分布式事务+读写分离+分库分表）
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6、测试异常情况，在代码中抛出异常，然后进行debug，查看在异常之前数据库数据是否入库，异常之后，入库数据是否已回滚。同时可观察undo_log表的数据情况。
# 在订单服务中添加 throw new BusinessException("测试异常回滚");

四、整合数据库分库分表 首先在我们整合dynamic-datasource和shardingsphere-JDBC之前，需要了解它们的异同点:dynamic-datasource从字面意思可以看出，它是动态多数据源，其主要功能是支持多数据源及数据源动态切换不支持数据分片，shardingsphere-jdbc主要功能是数据分片、读写分离，当然也支持多数据源，但是到目前为止如果要支持多数据源动态切换的话，需要自己实现，所以，这里结合两者的优势，使用dynamic-datasource的动态多数据源切换+shardingsphere-jdbc的数据分片、读写分离。
1、在gitegg-platform-bom和gitegg-platform-db中引入shardingsphere-jdbc的依赖,重新install。（注意这里使用了5.0.0-alpha版本，正式环境请使用最新发布版。）
5.0.0-alpha org.apache.shardingsphere shardingsphere-jdbc-core-spring-boot-starter ${shardingsphere.jdbc.version} org.apache.shardingsphere shardingsphere-jdbc-core-spring-namespace ${shardingsphere.jdbc.version}

2、在gitegg-platform-db中，新建DynamicDataSourceProviderConfig类，自定义DynamicDataSourceProvider完成与shardingsphere的集成
/** * @author GitEgg * @date 2021-04-23 19:06:51 **/ @Configuration @AutoConfigureBefore(DynamicDataSourceAutoConfiguration.class) public class DynamicDataSourceProviderConfig {@Resource private DynamicDataSourceProperties properties; /** * shardingSphereDataSource */ @Lazy @Resource(name = "shardingSphereDataSource") private DataSource shardingSphereDataSource; @Bean public DynamicDataSourceProvider dynamicDataSourceProvider() { Map datasourceMap = properties.getDatasource(); return new AbstractDataSourceProvider() { @Override public Map loadDataSources() { Map dataSourceMap = createDataSourceMap(datasourceMap); dataSourceMap.put("sharding", shardingSphereDataSource); return dataSourceMap; } }; }/** * 将动态数据源设置为首选的 * 当spring存在多个数据源时, 自动注入的是首选的对象 * 设置为主要的数据源之后，就可以支持shardingsphere-jdbc原生的配置方式了 */ @Primary @Bean public DataSource dataSource(DynamicDataSourceProvider dynamicDataSourceProvider) { DynamicRoutingDataSource dataSource = new DynamicRoutingDataSource(); dataSource.setPrimary(properties.getPrimary()); dataSource.setStrict(properties.getStrict()); dataSource.setStrategy(properties.getStrategy()); dataSource.setProvider(dynamicDataSourceProvider); dataSource.setP6spy(properties.getP6spy()); dataSource.setSeata(properties.getSeata()); return dataSource; } }

3、新建用来分库的数据库表gitegg_cloud_mall_order0和gitegg_cloud_mall_order1，复制gitegg_cloud_mall_order中的表结构。
4、在Nacos中分别配置shardingsphere-jdbc和多数据源
# shardingsphere 配置 shardingsphere: props: sql: show: true datasource: common: type: com.alibaba.druid.pool.DruidDataSource validationQuery: SELECT 1 FROM DUAL names: shardingorder0,shardingorder1 shardingorder0: type: com.alibaba.druid.pool.DruidDataSource url: jdbc:mysql://127.0.0.1/gitegg_cloud_mall_order0?zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=utf8&all owMultiQueries=true&serverTimezone=Asia/Shanghai username: root password: root shardingorder1: type: com.alibaba.druid.pool.DruidDataSource url: jdbc:mysql://127.0.0.1/gitegg_cloud_mall_order1?zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=utf8&all owMultiQueries=true&serverTimezone=Asia/Shanghai username: root password: root rules: sharding: tables: t_mall_order: actual-data-nodes: shardingorder$->{0..1}.t_mall_order$->{0..1} # 配置分库策略 databaseStrategy: standard: shardingColumn: id shardingAlgorithmName: database-inline table-strategy: standard: sharding-column: id sharding-algorithm-name: table-inline-order key-generate-strategy: column: id key-generator-name: snowflake t_mall_order_sku: actual-data-nodes: shardingorder$->{0..1}.t_mall_order_sku$->{0..1} # 配置分库策略 databaseStrategy: standard: shardingColumn: id shardingAlgorithmName: database-inline table-strategy: standard: sharding-column: id sharding-algorithm-name: table-inline-order-sku key-generate-strategy: column: id key-generator-name: snowflake sharding-algorithms: database-inline: type: INLINE props: algorithm-expression: shardingorder$->{id % 2} table-inline-order: type: INLINE props: algorithm-expression: t_mall_order$->{id % 2} table-inline-order-sku: type: INLINE props: algorithm-expression: t_mall_order_sku$->{id % 2} key-generators: snowflake: type: SNOWFLAKE props: worker-id: 123

5、修改OrderServiceImpl.java的下单方法order注解，数据源选择sharding
@DS("sharding")//每一层都需要使用多数据源注解切换所选择的数据库 @Transactional(propagation = Propagation.REQUIRES_NEW) @GlobalTransactional //重点 第一个开启事务的需要添加seata全局事务注解 @Override public void order(List orderSkuList, Long userId) { ...... }

6、postman模拟测试调用下单接口，观察数据库gitegg_cloud_mall_order0和gitegg_cloud_mall_order1里面的order表数据变化，我们发现，数据记录根据id取余存放到对应的库和表。这里的配置是使用order表的id，在实际生产环境中，需要根据实际情况来选择合适的分库分表策略。
SpringCloud微服务实战——搭建企业级开发框架（二十七）（集成多数据源+Seata分布式事务+读写分离+分库分表）
文章图片

SpringCloud微服务实战——搭建企业级开发框架（二十七）（集成多数据源+Seata分布式事务+读写分离+分库分表）
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7、测试引入shardingsphere-jdbc后分布式事务是否正常，在OrderServiceImpl.java的下单方法order中的最后主动抛出异常，saveBatch之后打断点，使用postman模拟测试调用下单接口，到达断点时，查看数据是否入库，放开断点，抛出异常，然后再查看数据是否被回滚。
orderSkuService.saveBatch(orderSkus); throw new BusinessException("测试异常");

SpringCloud微服务实战——搭建企业级开发框架（二十七）（集成多数据源+Seata分布式事务+读写分离+分库分表）
文章图片

SpringCloud微服务实战——搭建企业级开发框架（二十七）（集成多数据源+Seata分布式事务+读写分离+分库分表）
文章图片

SpringCloud微服务实战——搭建企业级开发框架（二十七）（集成多数据源+Seata分布式事务+读写分离+分库分表）
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备注：
1、sharding-jdbc启动时报错java.sql.SQLFeatureNotSupportedException: isValid
解决： 这个是4.x版本的问题，官方会在5.x结局这个问题，目前解决方案是关闭sql健康检查。
本文源码在https://gitee.com/wmz1930/GitEgg 的chapter-27（未使用shardingsphere-jdbc分库分表）和chapter-27-shardingsphere-jdbc（使用shardingsphere-jdbc分库分表）分支。
源码地址: 【SpringCloud微服务实战——搭建企业级开发框架（二十七）（集成多数据源+Seata分布式事务+读写分离+分库分表）】Gitee: https://gitee.com/wmz1930/GitEgg
GitHub: https://github.com/wmz1930/GitEgg

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