August 2005
Intermediate to advanced
350 pages
10h 29m
English
Content preview from Essential Business Process ModelingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Summary
The main points of this chapter include the following:
BPEL is an XML-based process definition language. The XML approach has several merits, including programmability, executability, exportability, and easy web services integration capabilities.
BPEL was originally written by IBM, Microsoft, and BEA, but has been handed over to OASIS for standardization. BPEL is based on IBM’s WSFL and Microsoft’s XLANG.
The source code for a BPEL process is a set of WSDL files and a BPEL XML file. WSDL is the standard web service definition format, specifying port types, partner link types, message types, and properties. The process definition references the WSDL, creating partner links based on WSDL partner link types and variables based on WSDL-defined message types. Compensation, fault and event handlers can be defined for the process or any of its scope levels. The flow of a BPEL process includes service touchpoints (
receive,invoke,reply) and control flow elements (wait,while,switch,flow,sequence,scope).BPELJ introduces Java extensions to “pure” BPEL, such as the ability to define Java process variable, evaluate dates and conditions with Java code, and embed code snippets. Other powerful features include Java partner links (enabling
invokecalls to local Java classes in addition to pure BPEL’s partner web services) and correlation based on Java classes.BPELJ source code can be XML with embedded Java or Java with annotated XML. The former approach is arguably better from a design ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.