How JPA 2.1 has become the new EJB 2.0

Beauty lies in the eye of the beholder. So does “ease”: Learn more about SQL Result Set Mappings and handle…

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Enumerating @NamedQuery within @NamedQueries

Introduction If you’re a Java developer using JPA, chances are that you’ve declared one or more @NamedQuery objects on your…

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JPA Database Schema Generation

For some time now, most of the main implementations of JPA, like Hibernate, EclipseLink or OpenJPA, offered ways to generate…

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A beginner’s guide to JPA and Hibernate Cascade Types

Introduction JPA translates entity state transitions to database DML statements. Because it’s common to operate on entity graphs, JPA allows…

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JPA 2.1: Unsynchronized persistence context

The JPA version 2.1 brings a new way how to handle the synchronization between the persistence context and the current…

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Hibernate Locking Patterns – How does PESSIMISTIC_READ and PESSIMISTIC_WRITE work

Introduction Java Persistence API comes with a thorough concurrency control mechanism, supporting both implicit and explicit locking. The implicit locking…

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JPA 2.1 criteria delete/update and temporary tables in Hibernate

Since JPA version 2.0 the EntityManager offers the method getCriteriaBuilder() to dynamically build select queries without the need of string…

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JPA Tutorial – The ULTIMATE Guide (PDF Download)

EDITORIAL NOTE: In this post, we feature a comprehensive JPA Tutorial. The Java Persistence API (JPA) is a Java programming…

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A beginner’s guide to Java Persistence locking

Implicit locking In concurrency theory, locking is used for protecting mutable shared data against hazardous data integrity anomalies. Because lock…

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