Spring Data ENVERS for versioning and auditing

Sprig data jpa test with real database.

Spring data jpa test with in memory database

Spring boot with H2 and Rest APIs with Swagger-UI

Spring boot with ehcache to cache the data for rest web services. Data will stay in memory for a given time after that will be queried again from Database.

Exercism Solutions

Java 8 Tutorial (Lambda, Streams etc.)