Creating a chat service to handle WebSocket traffic

If we visit http://start.spring.io, select Gradle, Spring Boot 2.0, Eureka Discovery, Config Client, Stream Rabbit, Lombok, and Reactive Web, we'll have a nice little service ready to chat:

    compile('org.springframework.boot:spring-boot-starter-webflux') 
    compile('org.projectlombok:lombok') 
    compile('org.springframework.cloud:spring-cloud-starter-stream-
     rabbit') 
    compile('org.springframework.cloud:spring-cloud-stream-reactive') 
    compile('org.springframework.cloud:spring-cloud-starter-eureka') 
    compile('org.springframework.cloud:spring-cloud-starter-config') 

These aforementioned dependencies in our new chat service can be described as follows:

• spring-boot-starter-webflux: This comes with a Reactive Streams capable WebSocket API
• lombok: This is the library that gets us out of the business of coding getters, setters, and other boilerplate Java code
• spring-cloud-starter-stream-rabbit: This is the Spring Cloud Stream...