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Posted by Ruud Steeghs at 8:26 on Friday 19 May    Add 'Standardizing Java Persistence with the EJB3 Java Persistence API' site to delicious  Add 'Standardizing Java Persistence with the EJB3 Java Persistence API' site to technorati  Add 'Standardizing Java Persistence with the EJB3 Java Persistence API' site to digg  Add 'Standardizing Java Persistence with the EJB3 Java Persistence API' site to dzone

Persistence is critical for most enterprise applications because they require access to relational databases such as Oracle Database 10g. If you’re developing applications using Java, you’re probably responsible for mundane tasks such as database updates and retrieval, which you do by writing JDBC and SQL. Over the last few years, several object-relational (O-R) mapping frameworks such as Oracle TopLink and JBoss Hibernate have become popular because they make persistence challenges simpler, freeing Java developers to write JDBC code and let them concentrate on business logic. Java standards such as EJB 2.x container-managed persistence (CMP) entity beans have also tried to solve persistence challenges but have been less successful.
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Although there are several options for building the persistence tier of applications, there is no single persistence standard for the Java platform that can be used in both the Java EE and Java SE environments. The good news is that the EJB3 Java Persistence API (JPA), which is part of the EJB 3.0 spec (JSR-220), standardizes persistence API for the Java platform. JSR-220 was widely received by O-R mapping vendors such as TopLink and Hibernate, as well as other leading application server vendors and JDO vendors. The EJB3 specification offers a compelling option for building the persistence tier of enterprise Java applications.

In this article, I’ll introduce the EJB3 Java Persistence API by using a simple domain object model as an example.

Posted by Ruud Steeghs at 19:43 on Wednesday 8 February    Add 'A New Java Persistence API for Berkeley DB' site to delicious  Add 'A New Java Persistence API for Berkeley DB' site to technorati  Add 'A New Java Persistence API for Berkeley DB' site to digg  Add 'A New Java Persistence API for Berkeley DB' site to dzone

Sleepycat Software is requesting feedback from its existing users and potential users on a new Java API for object persistence. This new API has similarities with, and significant differences from, other persistence approaches in Java such as EJB3 Java Persistence, Hibernate, and Java Data Objects (JDO).TSS

Posted by Ruud Steeghs at 19:43 on Tuesday 20 December    Add 'Banish Your Resistance to Persistence with the EJB 3.0 Persistence API' site to delicious  Add 'Banish Your Resistance to Persistence with the EJB 3.0 Persistence API' site to technorati  Add 'Banish Your Resistance to Persistence with the EJB 3.0 Persistence API' site to digg  Add 'Banish Your Resistance to Persistence with the EJB 3.0 Persistence API' site to dzone

With the 3.0 version of EJB, Java’s guardians have endeavored to make persistence a gentler beast that borrows the best from other ORM frameworks that have long curried favor with the community. Now, learn how to use the new spec, along with JBoss and Maven, to persist Java objects to a relational database.
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Posted by Hans-Jürgen Jacobs at 11:27 on Saturday 16 April    Add 'Hibernate 3 Adds XML-Relational Persistence' site to delicious  Add 'Hibernate 3 Adds XML-Relational Persistence' site to technorati  Add 'Hibernate 3 Adds XML-Relational Persistence' site to digg  Add 'Hibernate 3 Adds XML-Relational Persistence' site to dzone

Thanks to the XML persistence features in the recently released Hibernate 3, Java developers now have a framework that provides an efficient and consistent method for effortless OR and XML persistence. [devx.com]

Posted by Hans-Jürgen Jacobs at 18:51 on Tuesday 22 March    Add 'Java Toolbox An annotation-based persistence framework' site to delicious  Add 'Java Toolbox An annotation-based persistence framework' site to technorati  Add 'Java Toolbox An annotation-based persistence framework' site to digg  Add 'Java Toolbox An annotation-based persistence framework' site to dzone

Use J2SE 5 annotations to eliminate getters and setters Allen Holub [javaworld]

Posted by Hans-Jürgen Jacobs at 13:40 on Thursday 2 December    Add 'Simple Object Persistence with the db4o Object Database' site to delicious  Add 'Simple Object Persistence with the db4o Object Database' site to technorati  Add 'Simple Object Persistence with the db4o Object Database' site to digg  Add 'Simple Object Persistence with the db4o Object Database' site to dzone

Mapping Java objects to relational databases is a difficult task, fraught with perils and gotchas. db4o dodges the issue entirely by providing an object-oriented persistence mechanism that is small, lightweight and efficient. Jim Paterson shows how it works. [onjava.com]

Posted by Hans-Jürgen Jacobs at 13:41 on Friday 19 November    Add 'An Introduction to Java Object Persistence with EJB' site to delicious  Add 'An Introduction to Java Object Persistence with EJB' site to technorati  Add 'An Introduction to Java Object Persistence with EJB' site to digg  Add 'An Introduction to Java Object Persistence with EJB' site to dzone

The ‘impedance mismatch’ between relational databases’ tabular orientation and object-oriented Java’s hierarchical one is a perennial problem for which the Java world has several good solution offerings. This article, the first in a three-part series, will look specifically at the EJB specification and its unique way of solving the object-relational mapping problem. [java-channel.org]

Posted by jcn at 1:15 on Thursday 1 July    Add 'EJB 3.0 en persistence' site to delicious  Add 'EJB 3.0 en persistence' site to technorati  Add 'EJB 3.0 en persistence' site to digg  Add 'EJB 3.0 en persistence' site to dzone

Deze sessie is heeeel erg gemakkelijk samen te vatten: EJB 3.0 persistence = metadata + Hibernate.

Posted by jcn at 1:00 on Thursday 1 July    Add 'Building Data Access Objects: strategies & lessons learned' site to delicious  Add 'Building Data Access Objects: strategies & lessons learned' site to technorati  Add 'Building Data Access Objects: strategies & lessons learned' site to digg  Add 'Building Data Access Objects: strategies & lessons learned' site to dzone

Soms heb je sessies die niet helemaal voldoen aan de verwachtingen die je ervan hebt, en dit was er zo een. Ik had verwacht dat ze in zouden gaan op hoe je omgaat met DAO’s, waar je op moet letten als je ze bouwt en iets over de strategie hoe je ze moet gebruiken. De sessie ging over hoe zij een generieke data access object factory hebben gebouwd, een singleton waarmee je snel resultsets in objecten kunt duwen en dat op een generieke manier. Hoewel niet voldaan aan de verwachtingen, hierbij toch een overzicht.
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