Hibernate Tips is a series of posts in which I describe a quick and easy solution for common Hibernate questions. If you have a question for a future Hibernate Tip, please post a comment below. Question: I’m using BeanValidation to validate my entities automatically before they get persisted and updated. I defined different ValidationGroups for…
Many-to-Many associations are one of the most commonly used associations with JPA and Hibernate. You can find lots of examples for them in the real world, and you can map them with JPA and Hibernate as a uni- or bidirectional association in your domain model. But you probably also know that these mappings provide several…
Implementing a readable and maintainable persistence layer with Hibernate isn’t as easy as it might seem. It often starts with just a few annotations on some Java classes and a small number of Strings containing things like JPQL or native query statements and references to attributes, queries and bind parameter names. As the project grows, you implement more entity…
Everyone is building microservices. For the last 1.5 years, it was the dominant architectural style for all new software projects. And while a microservice architecture should make the implementation of each service easier, it also introduces new challenges. That’s especially the case for the persistence layer. So, it’s no surprise that I had lots of…
The access strategy defines how your JPA implementation, e.g., Hibernate or EclipseLink, access your entity attributes. You can choose between field-based access and property-based access: If you use field-based access, your JPA implementation uses reflection to read or write your entity attributes directly. It also expects that you place your mapping annotations on your entity attributes….
