Presentation Series on SOA : September 2010

1. Topic 3
Business Process Management
using BPEL
Assoc.Prof.Dr. Thanachart Numnonda
www.imcinstitute.com

2. Agenda
 Benefits of BPM?
 What is BPEL?
 BPEL Tools & Engines
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3. Benefits of BPM?
3

4. SOA Framework Recap
User Interface Dashboard (KPI)‫‏‬
User Interface + Single Window (Portal)
Business Process Management (BPEL)‫‏‬
Build Re-usable Services (ESB)‫‏‬
External/Internal Systems
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5. Business process
 A real-world activity consisting of a set of logically
related tasks
 When performed in the appropriate sequence, and
according to the correct business rules produces a
business outcome

6. Example Business Process

7. Components of a business process
• Trigger event
• Input to the process
• Tasks that need to be carried out
• Sequence or order of the tasks
• Exception scenario
• Output of the process

8. Process oriented organization
• Capability Maturity Model Integration (CMMI)
– Level 0: Not performed
– Level 1: Performed
– Level 2: Managed
– Level 3: Defined
– Level 4: Quantitatively managed
– Level 5: Optimizing
• Before you can automated process. It must be well
understood and well defined => Level 2

9. Business Process Management
 BPM is discipline that covers all aspects of defining
and performing business process.
 It has the following components
– Define the business process
– Establish the business process
– Put the process into practice
– Monitor and control the process
– Improve the business process

10. BPM Benefit
 Reduce the impedance mismatch between business
requirements and IT systems
 Increase employee productivity and reduce operational
costs
 Increase corporate agility and flexibility
 Reduce development costs and effort

11. Business Process and SOA
 SOA is an approach for application integration
 The most important SOA concept is composition of
services into business processes.
 Services are composed in a particular order and
provide a set of rule to provide support for business
processes
 It also enable us to modify business processes quickly
 implementation of a BPM system and the ability to
more easily create, manage, and maintain composite
applications

12. Silo IT

13. SOA and Web Services

14. Business Process Layer

15. BPM without Services

16. Business Process Approach
 Orchestration
 Business Process with central coordinator
 WS-BPEL
 Choreography
 Business Collaboration
 WS-CDL

17. Orchestration

18. Choreography

19. What is BPEL?
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21. Business Process Languages
• BPEL / WS-BPEL : OASIS Standard
• XLANG and the new version XLANG/s from Microsoft
• BPML (Business Process Modeling Language) from
BPMI.org
• WS-CDL (Web Services Choreography Description
Language)
• BPSS (Business Process Specification Schema), part of the
ebXML framework

22. WS- BPEL
• Web Service- Business Process Execution Language
• Version 1.0 released by IBM, Microsoft and BEA in Aug 2002
• Version 1.1 submitted to OASIS April 2003
• Version 2.0 available (2007)
• XML language for describing business processes based on
Web services
• Convergence of XLANG (Microsoft) and WSFL (IBM)
• Unprecendented industry consensus
• IBM, Microsoft, Oracle, Sun, BEA, SAP, Siebel …

23. BPEL Is a Web Service Sequencing
Language
• Process defines “conversation” flow chart
– Conversation consists of only WSDL-described message
exchanges.
• Process instance is a particular conversation
following the chart
– Execution systems can support multiple concurrent
conversations.

24. Value Proposition of WS-BPEL
• Portable business processes
– Built on top of an interoperable infrastructure of Web
services
• Industry wide language for business processes
– Common skill set and language for developers
• Choice of process engines
– Standards lead to competitive offerings

25. Developing BPEL
• Requires a good understanding of WSDL
• Knowledge of XML / BPEL commands
• For ease , uses modeling diagram like BPMN or
UML

26. BPEL Document Structure
<process>
<!– Definition and roles of process participants -->
<partnerLinks> ... </partnerLinks>
<!- Data/state used within the process -->
<variables> ... </variables>
<!- Properties that enable conversations -->
<correlationSets> ... </correlationSets>
<!- Exception handling -->
<faultHandlers> ... </faultHandlers>
<!- Error recovery – undoing actions -->
<compensationHandlers> ... </compensationHandlers>
<!- Concurrent events with process itself -->
<eventHandlers> ... </eventHandlers>
<!- Business process flow -->
(activities)*
</process>

27. BPEL Activities
Basic Activities Structured Activities
 <invoke>  <sequence>
 <receive>  <while>
 <reply>  <pick>
 <assign>  <flow>
 <throw>  <scope>
 <wait>  <compensate>
 <empty>  <switch>
 <link>

28. BPEL: Basic Activities
 <invoke>
 To invoke a one-way or request/response operation on a
portType offered by a partner
 <receive>
 To do a blocking wait for a matching message to arrive
 Can be the instantiator of the business process
 <reply>
 To send a message in reply to a message that was received
through a <receive>
 The combination of a <receive> and a <reply> forms a
request-response operation on the WSDL portType for the
process

29. BPEL: Basic Activities (cont.)
 <assign>
 Can be used to update the values of variables with new data
 <throw>
 Generates a fault from inside the business process
 <wait>
 Allows you to wait for a given time period or until a certain
time has passed
 <empty>
 Allows you to insert a "no-op" instruction into a business
process
 This is useful for synchronization of concurrent activities, for
instance

30. BPEL: Structured Activities
 <sequence>
 Perform activities in sequential order
 <flow>
 Perform activities in parallel
 <switch>
 Conditional choice of activities
 <scope>
 Enclose multiple activities in a single scope

31. Example Business Process
Receive <sequence>
<PO>
Invoke Invoke <CreditService> <flow>
<InventoryService>
Reply </sequence>
<Invoice>

32. Sample Activities in BPEL
<sequence>
<receive partnerLink=“customer” portType=“lns:purchaseOrderPT"
operation=“sendPurchaseOrder” variable=“PO”
createInstance="yes" />
<flow>
<invoke partnerLink=“inventoryChecker” portType=“lns:inventoryPT”
operation="checkINV" inputVariable="inventoryRequest"
outputVariable="inventoryResponse" />
<invoke partnerLink="creditChecker" portType=“lns:creditPT"
operation="checkCRED" inputVariable="creditRequest"
outputVariable="creditResponse" />
</flow>
...
<reply partnerLink=“customer” portType=“lns:purchaseOrderPT”
operation=“sendPurchaseOrder” variable=“invoice"/>
</sequence>

33. Simple BPEL Graphic Editor

34. BPEL Tools & Engine
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35. BPEL Components

36. BPEL Designer Tools
• IDE can be used to write BPEL or BPMN
• Examples:
– NetBeans 6.1/6.5
– Eclipse
– Oracle Jdeveloper 10g
– IBM WebSphere Studio
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37. BPEL Server
• Provides a run time environment for executing
BPEL
• Examples
– GlassFishESB (via BPEL SE)
– Oracle BPEL Process Manager
– Microosoft Biztalk
– Sun Java CAPS
– IBM WebSphere Business Integration Server
– Active BPEL Engine
– Apache Agila
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38. NetBeans BPEL Editor
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39. Example : BPEL
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40. GlassFish BPEL SE
• GlassFish V2 has OpenESB
• Project OpenESB implements ESB runtime using
Java Business Integration (JBI) as the foundation
• JBI container has BPEL SE (Service Engine)
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41. Resources
 Business Process Execution Language for Web
Services, Matjaz B. Juric
 Java SOA Cookbook, Eben Hewitt
 Building SOA-Based Composite Applications Using
NetBeans IDE 6, David Salter
 Understanding SOA with Web Services, Eric
Newcomer
 SOA in Practice, Nicolai M. Josuttis
 Service Oriented Architecture Field Guide for
Executives, Kyle Gabhart and Biphas Bhattacharaya
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42. Thank you
thananum@gmail.com
www.facebook.com/imcinstitute
www.imcinstitute.com
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