零碎知识点

java spi

https://www.jianshu.com/p/46b42f7f593c
http://dubbo.apache.org/zh-cn/docs/source_code_guide/dubbo-spi.html

thrift

DelayQueue

commons pool

限流方案

Guava-RateLimiter

接口幂等性

spring 如何扫描注解的 Bean 与资源，一下资源来自网络

https://yanbin.blog/how-spring-scan-beans-resources/#more-8339

java enum 状态机

https://www.cnblogs.com/sweetchildomine/p/6601211.html

java enum 单例

https://blog.csdn.net/leying521/article/details/86130270