OSGi DevCon London

by Alex Blewitt on  Mar 03, 2010 1

Last week saw the first OSGi DevCon London, held in conjunction with JAX London in Hammersmith's Novotel. Topics included features from the upcoming OSGi Enterprise Expert Group publication, using and testing OSGi in the cloud, accessing objects through JPA on an OSGi system and how modularity can defeat complexity brought on by exponential software growth.

Spring 3.0: Java 5 Required, Adds New Expression Language and REST Support

by Ryan Slobojan on  Dec 16, 2009 61

A new version of the Spring Framework, version 3.0, was released today. InfoQ spoke with Juergen Hoeller, technical lead of the Spring Framework project, to learn more about this release and the changes that it brings to the Spring portfolio.

Java Persistence 2.0 Proposed Final Draft

by Charles Humble on  May 27, 2009 6

The Java Persistence API version 2.0 has reached the proposed final draft stage. It adds a typesafe API for criteria queries with a corresponding metamodel API, and support for Bean validation.

Two Type-Safe Criteria API Proposals for JPA 2.0

by Charles Humble on  Jan 27, 2009 16

One of the most significant new features in the forthcoming Java Persistence API 2.0 specification is a type-safe criteria-based query API. There are two alternative proposals under consideration by the JSR-317 Expert Group and the group is seeking feedback from the wider development community.

DataNucleus Access Platform 1.0 (final) released

by Dio Synodinos on  Sep 14, 2008

DataNucleus, the successor to the Java Persistence Platform JPOX, has released DataNucleus Access Platform 1.0.0 which provides access to a range of datastores for Java applications using JDO/JPA API's.

Pratik Patel on Enterprise JPA, Fetch Groups and Spring 2.5

by Srini Penchikala on  Aug 25, 2008

JPA extension features like Fetch Groups offered by Apache OpenJPA framework can give enterprise Java developers more flexibility in designing JPA applications. Pratik Patel discussed JPA design techniques for developing real-world Java applications using JPA API and Spring 2.5 framework. He did a presentation at the recent Central Ohio Software Symposium on Enterprise JPA.

Hibernate 3.3: Redesigned, Modular JARs and a Refactored Caching System

by Ryan Slobojan on  Aug 15, 2008 3

Hibernate, a Java-based Object/Relational (O/R) mapping framework, released version 3.3 today. InfoQ spoke with project lead Steve Ebersole to learn more about this release and what new capabilities it adds to Hibernate.

Eclipselink 1.0 released

by Alex Blewitt on  Jul 14, 2008

EclipseLink last week released version 1.0. First announced at EclipseCon 2007, it was chosen by Sun as the reference implementation for JPA 2.0 at EclipseCon 2008.

WebDSL: Lessons Learned from Creating a DSL

by Jean-Jacques Dubray on  May 13, 2008

In this article, Eelco Visser summarizes his approach to design WebDSL, a domain-specific language for developing dynamic web applications with a rich data model with a target architecture based on JBoss's Seam. He discusses paradigms and challenges of Language Engineering while sharing some of the lessons he learned along the way.

DataNucleus Launched as Successor to Java Persistence Platform JPOX

by Dio Synodinos on  May 01, 2008

The open source Java persistence platform JPOX has become DataNucleus for its future direction, due to the significant changes in scope of the project since its initiation. The baseline product DataNucleus AccessPlatform, provides persistence to RDBMS, db4o, XML, LDAP and Excel datastores via JDO or JPA APIs.

Panel: Java Object Persistence: State of the Union

by Floyd Marinescu on  Mar 07, 2008 2

In this panel, the editors of (Floyd Marinescu) and (Roberto V. Zicari) asked a group of leading persistence solution architects their views on the current state of the union in persistence in the Java community.

JPA Frameworks Compared

by James Kao on  Jan 14, 2008 3 is hosting an article written by Sharad Acharya titled "Java Persistence Framework: Which, When, and What?" that compares four popular persistence frameworks: CMP Entity EJBs, JPA, Hibernate, and TopLink. Acharya discusses each technology and summarizes his findings in a matrix.

Presentation: Linda DeMichiel on EJB 3 & JPA

by Floyd Marinescu on  Jan 14, 2008 3

In this talk from last year's QCon London, Linda DeMichiel, who has been leading the EJB spec since the 1.0 days, presents EJB3 with a focus on JPA. The talk covers key aspects of the Java Persistence API and its role in the development of EJB 3.0 apps, including use of the EntityManager API, persistence units and persistence contexts, queries, object/relational mapping, etc.

Has JPA Killed the DAO?

by Craig Wickesser on  Sep 16, 2007 18

Recent developer discussion has explored whether JPA has killed the DAO pattern. DAO supporters argue that it isn't going anywhere soon however.

OpenJPA 1.0: Enterprise O/R Mapping with full JPA 1.0 compliance

by Ryan Slobojan on  Sep 11, 2007 3

Apache OpenJPA, an open-source implementation of the Java Persistence API (JPA), recently released version 1.0.0. InfoQ spoke with OpenJPA project lead Patrick Linskey to learn more about this release.