Excellent book by Greg L. Turnquist - no blabla, just stuff. Much better than the incredibly verbose and blablaistic Spring in Action.
Sample code here https://github.com/PacktPublishing/Learning-Spring-Boot-2.0-Second-Edition
You need MongoDB installed (IMHO better than using the embedded, I had issues)
https://www.mongodb.com/download-center?jmp=nav#community
download and install MongoDB community to D:\Program Files\MongoDB\Server\3.0\bin.... data by default is in D:\data\db
cd D:\Program Files\MongoDB\Server\3.0\bin
./mongod (it uses port 27017 by default)
./mongo
show dbs
show collections
db.chapter.find()
and possibly RabbitMQ:
https://www.rabbitmq.com/download.html
How to use the initializer:
https://start.spring.io/starter.zip?name=pvlearningspringboot&groupId=com.greglturnquist.learningspringboot&artifactId=pvlearningspringboot&version=1.0&description=pvlearningspringboot&packageName=com.greglturnquist.learningspringboot&type=gradle-project&packaging=war&javaVersion=1.8&language=java&bootVersion=2.0.3.RELEASE&dependencies=lombok&dependencies=data-mongodb-reactive&dependencies=thymeleaf&dependencies=webflux
