An IBM developerWorks Web services demo
June 2003
Try the Business Process Execution Language for Web Services live demo. Read about fundamental concepts of business process management. Learn how you can describe business processes using Business Process Execution Language for Web Services. See how you can use WebSphere Studio Application Developer and WebSphere Application Server to create and run robust real-life workflows on your own.
What is the Business Process Execution Language for
Web Services?
Business Process Execution Language for Web
Services (BPEL4WS) is a joint specification of BEA ,IBM, Microsoft, SAP, and Siebel that defines a notation for specifying business process behavior
based on Web services. It is positioned to become a Web services standard for
composition. Thus, the basic idea behind BPEL4WS is to combine the power of
business process management with flexibility and universality of Web services
(please refer to the demo
tutorial for information on basic principles of business process
management and BPEL4WS).
The marketplace scenario implemented in this
demonstration illustrates a simple interaction between a buyer and a
seller during their negotiation. It provides an interruptible workflow and shows
the use of correlation.
You will simulate the activity of both a buyer and a seller in turn. You start
as a buyer and create a new sales order. The order information is validated, and
the sales tax is calculated. As soon as the buyer confirms that he agrees with
the total order price and the tax, he submits the order to the seller system.
The next step is the assessment of the buyer's solvency. Note that order
validation, tax calculation, and solvency check are performed by the third-party Web
services. If the buyer's solvency check is a success, the seller reviews the order
to make a decision whether to approve or reject the order. This is the final
step of the scenario. After that, the order may be monitored or deleted both by
the buyer and the seller.
An important feature of the demo is an activity monitor - any time within the
order life cycle both the buyer and the seller can see the history of order status
changes. These statuses correspond to the activities, which make up the business
process.
Run the demo
The BPEL4WS demo is available on our server.
Note: The demo requires using Internet Explorer 5.0 (or higher) or Netscape
Navigator 4.5( or higher).
Download the code and documentation
Please see the demo usage instruction
for the detailed description of the demo business scenario.
Prerequisites
The
BPEL4WS demo tutorial introduces fundamental
concepts of business process management and describes how you can create and
run the marketplace demo on your own by using IBM WebSphere Studio Application
Developer and WebSphere Application Server. It also explains the rationale of
the demo architecture.
The following prerequisite software should be installed on your Windows machine
for creating and running the demo:
- WebSphere Studio Application Developer 5.0.
- WebSphere Application Server Advanced Edition 5.0.
You should also download the following software:
- Marketplace demo code is available in the BPEL4WS tutorial.
-
IBM BPWS4J Editor -- Eclipse plug-in that provides a simple editor for creating and
modifying BPEL4WS files.
Note: You do not need to download BPWS4J Enginebecause
it is included in the demo code.
Resources
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