ByThorben JanssenIn the real world, most objects have a natural identifier. Typical examples are the ISBN number of a book, a company’s tax identifier or a person’s social security number. You could, of course, use these identifiers as primary keys. But most often, it’s a better idea to generate numeric, surrogate keys. They are easier to…
ByThorben JanssenHibernate Tips is a series of posts in which I describe a quick and easy solution for common Hibernate questions. If you have a question you like me to answer, please leave a comment below. Question: I want to make sure that my query gets canceled after a certain time. Is there a way to…
ByThorben JanssenHibernate 5.2 introduced several changes based on Java 8 features. In previous posts, I showed you how to get query results as a Stream and the support of DateTime API classes and Optional. In this post, I will have a look at a small change to some Hibernate annotations. Some of them are now @Repeatable…
ByThorben JanssenHibernate Tips is a series of posts in which I describe a quick and easy solution for common Hibernate questions. If you have a question you like me to answer, please leave a comment below. Question: The value of one of my entity attribute gets calculate by an SQL function. How can I map that…
ByThorben JanssenJava 8 introduced Optional<T> as a container object which may contain null values. It’s often used to indicate to a caller that a value might be null and that it need to be handled to avoid NullPointerExceptions. Sounds pretty useful, right? So why not use them in your persistence layer for optional entity attributes or…