For the use cases that I am going to describe here, I have 2 services:

courses-service basically provides CRUD operations for dealing with courses and instructors.
reviews-service is another CRUD operations provider for dealing with reviews for courses that are totally agnostic of courses from courses-service.

Both apps are written in Kotlin using Spring Boot and other libraries. Having these 2 services, we are going to discuss distributed caching with Apache Ignite and Spring Boot, and we’ll see how we can use code-deployment to invoke remote code execution via Apache Ignite on a service.