Let's use a product table in a standard relational database and access it in our service using Spring Data. Spring Data provides excellent abstractions to use the Java Persistence API (JPA) and makes coding data access objects (DAO) much easier. Spring Boot further helps in writing minimal code to begin with and extending it as we go ahead.
Spring Boot can work with embedded databases, such as H2, HSQLDB, or the external database. In-process embedded database starts with our Java service in a process and then terminates when the process dies. This is fine to begin with. Later on, the dependencies and URLs can be changed to point to actual databases.
You can take the project from Chapter 2, Writing Your First Cloud-Native ...
