JPA Articles

1. Persistence Context

In this article we will cover Container vs Application Managed EntityManager (Persistence Context) and its relationship with JTA or RESOURCE LOCAL transaction management.
In this article we will cover the differences between TRANSACTION and EXTENDED Persistence Context (Entity Manager).

2. Entity Relationships

This article explains why do the Java Persistence API (JPA) often generates additional queries while dealing with OneToOne relationships

3. Locking

This article covers database optimistic locking in general and also demonstrates how to implement optimistic locking in Java Persistence API (JPA) entities by using the @Version annotation
This article covers the optimistic and pessimistic locking mechanisms available in the Java Persistence API (using LockModeType)
About the author
Gonçalo Marques is a Software Engineer with several years of experience in software development and architecture definition. During this period his main focus was delivering software solutions in banking, telecommunications and governmental areas. He created the Bytes Lounge website with one ultimate goal: share his knowledge with the software development community. His main area of expertise is Java and open source.

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He is also the author of the WiFi File Browser Android application: