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,
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.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.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.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.
Microsoft XLANG: BPEL Forerunner
Microsoft published XLANG[*] in 2001 as the business process language for its BizTalk ecommerce suite. Compared with the offerings of more recent BPM standards, XLANG is a relatively simple language, but its ideas, along with those of WSFL, form the basis for the design of BPEL. As an author and supporter of BPEL, Microsoft has turned away from XLANG and effectively shelved it. (BPM time moves rapidly!) Nonetheless, understanding XLANG is valuable for two reasons:
Its influence on BPEL
Its basis in the pi-calculus
The pi-calculus connection is examined in Chapter 3. This chapter focuses on the first point.
XLANG is an early XML-based, web services-aware process definition language. An XLANG process is defined in a WSDL as part of the definition of a WSDL service. The XLANG process defines the behavior of the service.
Note
Basic WSDL knowledge is essential to understanding XLANG. In previous chapters we have seen that a WSDL port type is a set of operations with message input and output types. A WSDL port binds a port type to a specific transport endpoint. A service is a set of ports. Calling a web service means connecting to one of its ports and interfacing with one of the port’s operations by exchanging messages with it.
In the code sample in Example 9-2, the service
AcctService (lines 31-49), which
has ports AcctPort (lines 32-34)
and AcctCallbackPort (lines 35-37)
corresponding to port types AcctPT
(lines 8-12) and AcctCallbackPT (lines 12-21) respectively, ...
Become 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,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.