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Join the chat on YouTube. Natural vs Surrogate Primary Keys When modeling your entity classes and database tables, you need to decide what kind of primary key you want to use. You can use a combination of attributes that identify an object. This is called a natural key. Or you could introduce an artificial, technical…

Join the chat on YouTube. Utility classes that make your life easier Implementing a persistence layer with Hibernate can require a lot of String references: You’re referencing entities and their attributes by their name. Query hints have very long names that you need to provide as a String. When registering an entity graph, you need…

Join the chat on YouTube. Enums, Enums, Enums … Enums are the perfect data type, if an attribute can only have one out of a set of predefined values. A typical example is the rating of a product, which can have the values 1, 2, 3, 4 and 5. Using JPA’s default mappings, you can…

Join the chat on YouTube. JPQL vs. Criteria vs. Native Queries With JPQL and native SQL queries, Hibernate supports 2 query languages that you can use to search data in your database. In addition to that, there is also JPA’s Criteria API that replaced Hibernate’s proprietary Criteria API. It might seem like there are 3…

Join the chat on YouTube. Auditing with Hibernate Envers In today’s stream, we will talk about another often requested topic: Writing and managing an audit log with Hibernate Envers. I will show you how to set up Hibernate Envers for your project and how you can use its query APIs to extract information from your…