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DDD整改若干意见 #1177

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KouShenhai opened this issue Jan 23, 2024 · 21 comments
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DDD整改若干意见 #1177

KouShenhai opened this issue Jan 23, 2024 · 21 comments
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KouShenhai commented Jan 23, 2024 •
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遇到的问题？（你们有思考这些问题？）
1.既然是ddd，那ddd怎么根据业务逻辑抽象领域模型
2.充血模型和贫血模型有什么区别？怎么选择？之前面向过程的代码怎么转换成面向领域设计的代码？
3.事件可以溯源，那是不是就需要存储下来，是不是会牵扯到大量数据存储问题？分库分表？分区？主从复制/读写分离？
4.底层由MQ发布事件，是不是就涉及MQ相关的问题？消息重复？消息丢失？消息堆积？消息消费的顺序？
5.消息消费失败，是走消息重试？还是走定时任务重新发布？
6.只针对单体好处理？这个项目是多租户，微服务架构，读取与写入数据，怎么处理多数据源切换？
7.每个服务都需要处理所有的事件？
8.Seata Saga模式怎么改造？
@KouShenhai KouShenhai self-assigned this Jan 23, 2024
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KouShenhai commented Jan 24, 2024 •
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1.应用层直接调用基础层（只限于缓存与文件系统，其他需要走领域层）

create remove find modify findVersion

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KouShenhai commented Jan 25, 2024 •
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领域事件

基于消息队列

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KouShenhai commented Jan 25, 2024 •
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web
find、create、modify、remove page

gateway
modify create find remove page

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KouShenhai commented Jan 25, 2024 •
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值对象不具备唯一标识

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值对象不应该唯一

cqrs

读模型直接走mapper
写模型走领域及mapper

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写 去掉返回值
读 有返回值

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lombok 禁止使用@Setter和@DaTa

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@value 表示值对象

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领域事件投递到MQ消息可能会重复，因此，数据库增加事件ID，并且事件ID不能重复

@KouShenhai KouShenhai mentioned this issue Jan 26, 2024
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#1183
#1182
#1181
#1180

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事件溯源，消息发送成功则清除事件

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#1184

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#1185

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#1191

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KouShenhai commented Jan 30, 2024 •
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定时任务（xxl-job） => 推送未执行成功的领域事件

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#1193

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KouShenhai commented Jan 31, 2024 •
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事件溯源，消息发送成功修改事件状态

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KouShenhai commented Jan 31, 2024 •
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lombok使用（非常重要）

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#1194

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#1195

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#1201

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