BPELJ
BEA Systems and IBM published a jointly-authored whitepaper on a suggested BPEL extension named BPELJ. From the whitepaper, "This whitepaper proposes a combination of BPEL with Java, named BPELJ, that allows these two programming languages to be used together to build complete business process applications. By enabling BPEL and Java to work together, BPELJ allows each language to do what it does best." There is considerable controversy around this proposed approach.

Four Star Resources

BPEL and Java
This article discusses the role of BPEL and its relationship with Java, concentrating particularly on "the idea of extending BPEL, to be able to compose resources other than web services (for example EJBs, JMS, etc.) on one hand, and the possibility to mix BPEL and Java code on the other hand to open up some interesting new perspectives."
Source: Matjaz Juric

Why do I strongly support BPEL-J?
The personal views of Jean-Jacques Dubray on the uses of BPEL as a programming language, with real-world examples in graph form. Also links to response from Stefan Tilkof which challenges Dubray's interpretation of BPEL.
Source: ebPML.org

The Definitive BPEL and Java Article
News forum containing posts and responses on various aspects of BPEL programming and uses.
Source: TheServerSide.com

BPELJ: BPEL for Java Technology
IBM and BEA Systems' whitepaper that defines BPELJ.
Source: IBM

If BPELJ Why Not BPEL.NET
On the surface, [BPELJ] looks like a good idea... he problem is that the Java /.net divided rears its head again. One of the good things about BPEL4WS is that it is sits above these two environments and we are seeing implementations of it by Microsoft, IBM, BEA and others."
Source: IT-Director.com

BPEL and BPELJ: The Role of Standards in Building Process Driven Applications
In this 56 minute recorded Webinar, hear from Stephen Hood, Product Manager for WebLogic Integration at BEA, on how technologies like BPEL and BPELJ can aid in the development of process-driven applications and the deployment of service oriented architectures. Stephen outlines the functionality of both BPEL and BPELJ; he explores the advantages that process standards provide to developers, architects, and administrators; and he outlines BEA's product plans regarding these technologies." Includes audio and slides in Windows Media format.
Source: BEA Systems

Why do I strongly support BPEL-J?
Here is my take on where I think BPEL-J fits. I don't expect anyone at BEA, IBM or Collaxa, or even actually in the BPEL community to agree with me." An interesting piece that frames where and how BPELJ may fit in the BPEL universe.
Source: ebPML.org

Three Star Resources

The Power of Process, the Benefit of BPEL
"Taking advantage of IBM's [proprietary] BPEL extensions." A description of how IBM extends BPEL with its own language extensions. This move makes IBM's brand of BPEL decidedly non-portable.
Source: WebSphere Journal

BPEL and BPELJ
Provides latest information in BEA's development of BPEL and BPELJ
Source: dev2dev

BEA, IBM Propose JAVA/BPEL 'Marriage'
A brief look at the BPELJ concept from the vendor and analyst perspectives. Includes a few quotes from two Forrester Research analysts. Worthwhile reading.
Source: internetnews.com

Enough is Enough in the Field of BPM: We Don't Need BPELJ: BPML Semantics Are Just Fine
A lengthy response to the BPELJ proposal from a leading proponent of BPML. While strongly opinionated, this document contains interesting information about BPEL.
Source: Howard Smith

At Gartner Summit: When BPEL meets Java
Expect BPEL mappings to specific language to happen rapidly throughout 2004 and 2005," Daryl Plummer, sector general manager at Gartner, told attendees at Gartner's Application Integration and Web Services Summit this past week." Several quotes about BPEL and BPELJ.
Source: ADTmag.com

BPEL Java Extensions May Reduce BPEL Portability
If you code the BPELJ extensions, then your BPEL may not be portable to other BPM platforms. I'm not sure that this is the right answer to pulling in local, non web-serviced, resources into business processes."
Source: AboutEA.com

BPELJ: A Bad Idea
If nothing else we've learned how to layer code in appropriate ways, but BPELJ seems to blithely ignore any attempt at functional isolation."
Source: Barry Briggs