OpenJDK JDK 回归测试框架 jtreg 发布 8.3.0 版本，并且已经准备好集成到 JDK 中。这次更新带来的主要变化包括：在主测试中支持 JEP 512、紧凑源文件和实例主方法；增强了对驱动模式下 /native 标签的支持，并对使用 @enablePreview 标签的测试提供支持。要了解有关该版本的更多详细信息，请参阅发布说明。 JDK ...

Usually, our applications operate with the current state of a domain object. But sometimes, we need to know the entire history of the domain object changes. For example, we want to know how an order ...

Spring Batch is a powerful module of the Spring framework that provides out-of-the-box implementation for batch processing tasks. It is used in scenarios where data needs to be processed in multiple ...

所谓“多租户（Multi-Tenancy）”，本质上就是：一套系统，同时服务多个客户，并且每个客户的数据互相隔离。 很多团队第一次做 SaaS 系统时，对“多租户”这件事的理解都非常粗暴。 数据库实例爆炸、连接池失控、迁移困难、资源利用率极低。 更致命的是 ...

Another year passes. I was hoping to write more articles instead of just these end-of-the-year screeds, but I almost died in the spring semester, and it sucked up my time. Nevertheless, I will go ...

Community driven content discussing all aspects of software development from DevOps to design patterns. The SQL specification defines four transaction isolation levels, although a fifth transaction ...

如果不想这样，只能修改代码的所有表对象的字段类型和传参类型保证与postgres数据库的字段类型对应，但是有些依赖的框架底层自己操作数据库可能就无法修改源码了，只能修改数据库表字段类型了。 spring: datasource: # 修改驱动类 driver-class-name: org.postgresql.Driver ...

Community driven content discussing all aspects of software development from DevOps to design patterns. Multiversion concurrency control (MVCC) is a database optimization technique. MVCC creates ...