InfoQ Homepage EJB Content on InfoQ
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JPA Frameworks Compared
java.net 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.
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Presentation: Linda DeMichiel on EJB 3 & JPA
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.
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Is Java EE 5 easier with EJB?
Many enterprise Java developers gained some experience with Enterprise JavaBeans and went on to choose technologies they deemed lighter-weight, because they felt that building a solution by hand or with a lighter-weight framework was easier and less time-consuming. With EJB 3.X, is it still true that a POJO-solution is simpler, more-comprehensible code? Adam Bien doesn't think so:
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Eclipse Web Tools Platform 2.0: Now with JPA and JSF tools
As part of the Eclipse 3.3 (Europa) release two months ago, Version 2.0 of the Eclipse Web Tools Platform (WTP) was released. InfoQ spoke with WTP co-lead Jess Garms to learn more about this release and about WTP in general.
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OpenJPA adopted by both IBM and BEA; becomes top-level Apache project
Apache OpenJPA has been gaining momentum in the JEE world, having been adopted by BEA as the EJB3 JPA implementation in WebLogic Server 10 and in the most recent EJB3 Feature Pack for IBM WebSphere Application Server. OpenJPA started its life in BEA's Kodo product, whose code was donated to the ASF in 2006; the project just recently graduated from the Apache Incubator as well.
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Interview: Mike Keith on EJB 3
In the latest video interview, EJB 3 co-spec lead Mike Keith discusses the current state of EJB 3, including common praises and criticisms that have been received. He also talks about POJO support and how the spec has evolved towards dependency injection.
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InfoQ Article: An Introduction to JBoss Seam 1.1
JBoss Seam is a new full-stack web application framework that unifies and integrates Ajax, JSF, EJB2, Portlets, and BPM. Seam 1.1 released last week, and InfoQ has published an introduction to Seam, explaining what Seam can do with a HelloWorld example.
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Job Trends: EJB, Spring, and Hibernate
Rick Hightower has posted a few graphs from Indeed's Job Trends comparing Spring against EJB3 and various ORM tools against each other. The graphs show that Spring is steadily gaining while EJB3 (and EJB overall) is not. Similarly, Hibernate continues to dominate the ORM field in job postings.
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On migrating from Python & Zope to Java with EJB 3 & JBoss SEAM
Nuxeo has announced that the next version of its ECM product will be based entirely on Java, using JBoss SEAM, EJB 3, and JBoss. The move is interesting for a company claiming to be "the biggest Zope-focused company in the world." InfoQ spoke to Nuxeo's engineering team to find the why and how of their move.
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Interview: Florent Benoit on the EasyBeans EJB3 Container and OSGi Support
The EasyBeans EJB3 container project recently announced support for deploying the container as a set of OSGi modules. InfoQ sat down with Florent Benoit of Bull R&D to discuss this new feature as well as how EasyBeans compares to other EJB3 implementations such as JBoss and Gernonimo.
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Spring and EJB 3 Compared
devx is hosting an article comparing Spring 2 and EJB 3 focusing on support for persistence, transaction management, and statefulness, concluding that support is mostly the same with but with EJB being slightly better at handling state.
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InfoQ Article: Grails + EJB Domain Models Step-by-Step
Grails could bring Ruby on Rails style productivity to the Java platform, built on the Groovy language and fully integrated with Java. In this tutorial, Jason Rudolph shows how to use Grails to quickly build a functional website around an existing EJB 3 entity bean domain model with very little code.
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Mastering EJB 3.0 is Out
The fourth edition of the best seller Mastering EJB is now launched and as per prior tradition, is available for free download on TheServerSide.com. The new version is updated for EJB 3.0 and also covers tips and techniques related to deployment, and integration.
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InfoQ Article: EJB 3 Essential Glossary
InfoQ is hosting an EJB 3.0 glossary of new terms and API elements introduced in EJB 3. It explains buzzwords like Inversion of Control (IoC), Configuration by Exception, POJO, POJI, Dependency Injection etc, etc. The glossary is an ongoing work in progress. Updates will continue to be made to it.
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Summary of TSS Future of Enterprise Java Panel
Cameron Purdy, Rod Johnson, Bruce Snyder, Bruce Tate, Floyd Marinescu and Ari Zilka participated in an annual 'what is the future of enterprise java?' panel at the last TSS Symposium, which was just published in video by TSS. The panel covered hard issues such as 'will EJB 3 matter?', open source Java, web 2.0, scripting languages. Read InfoQ's summary.