JPA Tutorial – Setting Up JPA in a Java SE Environment

JPA stands for Java Persistence API, which basically is a specification that describes a way to persist data into a persistent storage,…

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Compile-time checking JPA queries

JPA provides several alternatives for querying data. Such alternatives may be classified attending to a variety of criteria, eg, language…

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A beginner’s guide to JPA/Hibernate flush strategies

Introduction In my previous post I introduced the entity state transitions Object-relational mapping paradigm. All managed entity state transitions are…

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From JPA to Hibernate’s legacy and enhanced identifier generators

JPA identifier generators JPA defines the following identifier strategies:                 Strategy Description AUTO…

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Using @NamedEntityGraph to load JPA entities more selectively in N+1 scenarios

The N+1 problem is a common issue when working with ORM solutions. It happens when you set the fetchType for…

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Testing with Aliens: How to test a JPA type converter with Arquillian

This post was written together with +Aslak Knutsen (@aslakknutsen). JPA type converters provide an easy way to define how an…

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How to use a JPA Type Converter to encrypt your data

A few days ago, I read an interesting article by Bear Giles about Database encryption using JPA listeners from 2012.…

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JPA 2.1 Entity Graph – Part 2: Define lazy/eager loading at runtime

This is my second post on JPA 2.1 Entity Graphs. The first post described the usage of named entity graphs.…

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JPA 2.1 Entity Graph – Part 1: Named entity graphs

Lazy loading was often an issue with JPA 2.0. You have to define at the entity if you want to…

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