An intro to the bleeding edge attempt at rapidly standardizing how to do microservices in the Java world (aka Microprofile): https://dzone.com/articles/microprofile-5-things-you-need-to-know

To start playing around with it: https://github.com/eclipse/microprofile-conference

Spring Boot seems to be an altogether superior and mature way (although opinionated) to implement microservices, and doesn’t even enter into the discussions around Microprofile.