This application demonstrates a possible backend solution to the assessment.

The solution is implemented as a server with three layers according to domain-driven design:

• Presentation-layer (main package) which contains the REST controller.
• Business-layer with a domain class and a service.
• Persistence-layer with a minimalistic entity class and a data repository.

Though for this simple application a domain-driven design might be overkill, it is used for demonstrative purposes.

Additional notes:

• Simple in-memory persistence with H2.
• The entity class is slightly different from the domain class to represent a more realistic scenario.
• For demonstration, the REST controller POST and DELETE handlers use Spring's ResponseEntity to achieve conformity to REST-ful standards like Location header and specialized HTTP status codes.
• For simplicity, the domain class (Reminder) is also used as the DTO in the presentation-layer.
• A minimalistic integration test for the application was also implemented (see TodoApplicationTests).
• Javadoc and error handling where skipped to keep things simple.

For building and running the application you need:

• JDK 11

./mvnw spring-boot:run

Service listens on http://localhost:8080

./mvnw clean package

Resulting JAR package can be found in ./target.