JPA and Hibernate provide a default mapping that maps each entity class to a database table with the same name. Each of its attributes gets mapped to a column with the same. But what if you want to change this default, e.g., because it doesn’t match your company’s naming conventions? You can, of course, specify…
Most domain models have a few technical attributes shared by most entity classes. Typical examples are the version attribute and the timestamp or user who performed the last update or persisted an entity. In these situations, many developers ask themselves what’s the best way to model these attributes. Oleg did the same recently in the…
Inheritance is one of the key concepts in Java, and most development teams prefer using it in their domain model. Unfortunately, relational table models don’t support the concept of inheritance. The JPA specification defines multiple mapping strategies to bridge the gap between the object-oriented and the relational world. I explained them in great detail in…
When using Spring Data JPA, most developers are used to letting Spring handle almost all database operations. That’s especially the case for all update operations. Thanks to JPA’s entity mappings and the managed lifecycle of all entity objects, you only need to change an attribute of an entity object. Everything else happens automatically. But having…
I’ve great news to share. Today I’m announcing the Persistence Hub and giving you a first glimpse inside. 2 weeks ago, I announced that we stop offering online courses as one-off purchases. Instead, we will offer a membership including all my courses, a community forum, and interactive live events. Combining all of these will provide…
