ByThorben JanssenThis post was originally published on sitepoint’s Java channel: 5 Reasons to Use JPA / Hibernate. Before we dive into the reasons to use JPA, let me quickly explain what it is. The Java Persistence API (JPA) is a specification for object-relational mapping in Java. As for most standards within the Java Community Process, it…
ByThorben JanssenHibernate is by far the most popular JPA implementation. This popularity brings several advantages for all users. There are lots of blog posts about it, questions and answers on popular forums, and well-established best practices. In this post, I want to summarize some best practices for JPA and Hibernate which will help you to avoid…
ByThorben JanssenHow do you get the primary key values in your application? Do you use natural keys or do you generate technical IDs? I prefer to generate simple, numerical, technical IDs like you can see in the following code snippet instead of using natural keys which often require the combination of multiple attributes. @Id private Long…
ByThorben JanssenDo JPA and Hibernate really fit the project you’re about to start? This important question gets not asked often enough! And if you don’t think about it in the beginning, it will be difficult to change your mind after the project starts. Most often, the persistence framework gets selected based on personal preferences. And while…
ByThorben JanssenJPA provides 2 standard mappings for enums, but both have serious downsides. Using the @Enumerated annotation, you can use EnumType.ORDINAL or EnumType.STRING to map the enum value to its database representation. The ordinal of an Enum depends on the ordering of its values and can create problems if we need to add new ones. The…