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Topic 3

 Business Process Management
          using BPEL
    Dr.Thanachart Numnonda
  Sun Microsystems (Thailand)
Asst.Prof.Thanisa Kruawaisayawan
            KMITL
Agenda
 Benefits   of BPM?
 What   is BPEL?
 BPEL   Syntax
 BPEL   Tools & Engines
 NetBeans    6.5 Demo

                             2
Benefits of BPM?




                   3
SOA Framework Recap

    User Interface Dashboard (KPI)

User Interface + Single Window (Portal)

Business Process Management (BPEL)

    Build Re-usable Services (ESB)

      External/Internal Systems

                                          4
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
Example Business Process
Services composition
 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
 BPEL is used as a dedicated language
Business Process Management
   addresses how organizations can identify, model,
    develop, deploy, and manage their business processes
   including processes that involve IT systems and
    human interaction.
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
Benefit of BPM, SOA and WS
   more flexible and agile
   implementation of a BPM system and the ability to
    more easily create, manage, and maintain composite
    applications
Silo IT
SOA and Web Services
Business Process Layer
BPM without Services
Need for Business Process
   Developing the web services and exposing the
    functionality is not sufficient
   We also need a way to orchestrate these functionality in
    the right order
   Example:
       Concert ticket purchase Web service has 3 operations,
        which need to be performed in the following order
        >   Getting a price quote
        >   Purchase a ticket
        >   Confirmation and cancellation
Business Process & Workflow
   A business process describes what has to be done
    (including input and output). It might include manual
    activities (Human Task) and might use any kinds of
    resources.
   A workflow describes how a certain result can be
    reached. It looks further into the details of all the steps
    or activities.
Example of a business process
hierarchy with a workflow layer
Orchestration & Choreography
   Orchestration
       Business Process with central coordinator
       WS-BPEL
   Choreography
       Business Collaboration
       WS-CDL
Orchestration
Choreography
What is BPEL?




                21
Business Process Management using BPEL
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
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 …
Business Processes with BPEL
•   BPEL can describes business processes in two
    distinct ways
•   Executable business processes specify the exact
    details of business processes and can be executed
    by a BPEL engine.
•   Abstract business processes specify only the
    public message exchange between parties, without
    including the specific details of process flows.
    They are not executable and are rarely used
BPEL “Fixes” WSDL
• WSDL: unordered set of operations
   – Operations are message exchanges
• Need rules for ordering
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.
BPEL is a WS Composition
                Language
•   Consumes services (invoke)
•   Creates services (receive/reply)
•   Aggregates fine-grained services
•   Creates coarser-grained service
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
BPEL Syntax




              30
Developing BPEL
•   Requires a good understanding of WSDL
•   Knowledge of XML / BPEL commands
•   For ease , uses modeling diagram like BPMN or
    UML
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>
<partnerlink>
•   BPEL enable us to accurately specify relations
    between several web services in the business
    process.
•   These relations are called partner links
BPEL: Relationship to Partners
                  WSDL
                                          Partner Service




                                          Partner Service

Partner Service
                  Orchestrating Process
                         (BPEL)           Partner Service
Business Process
Business Process & <partner links>
BPMN
• Business Process Manafement Notation
• Notation is similar to UML
• Allow business people to describe a process flow
    from a hugh level
• BPEL is more suited to technical people.
Simple BPEL Graphic Editor
BPEL Activities
Basic Activities            Structured Activities
 <invoke>                   <sequence>

 <receive>                  <while>

 <reply>                    <pick>

 <assign>                   <flow>

 <throw>                    <scope>

 <wait>                     <compensate>

 <empty>                    <switch>

                             <link>
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
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
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
BPEL Tools & Engine




                      43
BPEL Components
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




                                            45
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

                                                     46
NetBeans 6.5 BPEL Editor




                           47
Example : BPEL




                 48
NetBeans 6.5 Demo




                    49
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)




                                                        50
Resources
 Some contents are borrowed from the presentation
  slides of Sang Shin, Java™ Technology Evangelist,
  Sun Microsystems, Inc.
 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



                                                 51
Thank you
thanachart.numnonda@sun.com
     twitter.com/thanachart
 www.facebook.com/thanachart



                               52

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Business Process Management using BPEL

  • 1. Topic 3 Business Process Management using BPEL Dr.Thanachart Numnonda Sun Microsystems (Thailand) Asst.Prof.Thanisa Kruawaisayawan KMITL
  • 2. Agenda  Benefits of BPM?  What is BPEL?  BPEL Syntax  BPEL Tools & Engines  NetBeans 6.5 Demo 2
  • 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 4
  • 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
  • 7. Services composition  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  BPEL is used as a dedicated language
  • 8. Business Process Management  addresses how organizations can identify, model, develop, deploy, and manage their business processes  including processes that involve IT systems and human interaction.
  • 9. 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
  • 10. Benefit of BPM, SOA and WS  more flexible and agile  implementation of a BPM system and the ability to more easily create, manage, and maintain composite applications
  • 12. SOA and Web Services
  • 15. Need for Business Process  Developing the web services and exposing the functionality is not sufficient  We also need a way to orchestrate these functionality in the right order  Example:  Concert ticket purchase Web service has 3 operations, which need to be performed in the following order > Getting a price quote > Purchase a ticket > Confirmation and cancellation
  • 16. Business Process & Workflow  A business process describes what has to be done (including input and output). It might include manual activities (Human Task) and might use any kinds of resources.  A workflow describes how a certain result can be reached. It looks further into the details of all the steps or activities.
  • 17. Example of a business process hierarchy with a workflow layer
  • 18. Orchestration & Choreography  Orchestration  Business Process with central coordinator  WS-BPEL  Choreography  Business Collaboration  WS-CDL
  • 23. 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
  • 24. 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 …
  • 25. Business Processes with BPEL • BPEL can describes business processes in two distinct ways • Executable business processes specify the exact details of business processes and can be executed by a BPEL engine. • Abstract business processes specify only the public message exchange between parties, without including the specific details of process flows. They are not executable and are rarely used
  • 26. BPEL “Fixes” WSDL • WSDL: unordered set of operations – Operations are message exchanges • Need rules for ordering
  • 27. 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.
  • 28. BPEL is a WS Composition Language • Consumes services (invoke) • Creates services (receive/reply) • Aggregates fine-grained services • Creates coarser-grained service
  • 29. 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
  • 31. Developing BPEL • Requires a good understanding of WSDL • Knowledge of XML / BPEL commands • For ease , uses modeling diagram like BPMN or UML
  • 32. 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>
  • 33. <partnerlink> • BPEL enable us to accurately specify relations between several web services in the business process. • These relations are called partner links
  • 34. BPEL: Relationship to Partners WSDL Partner Service Partner Service Partner Service Orchestrating Process (BPEL) Partner Service
  • 36. Business Process & <partner links>
  • 37. BPMN • Business Process Manafement Notation • Notation is similar to UML • Allow business people to describe a process flow from a hugh level • BPEL is more suited to technical people.
  • 39. BPEL Activities Basic Activities Structured Activities  <invoke>  <sequence>  <receive>  <while>  <reply>  <pick>  <assign>  <flow>  <throw>  <scope>  <wait>  <compensate>  <empty>  <switch>  <link>
  • 40. 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
  • 41. 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
  • 42. 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
  • 43. BPEL Tools & Engine 43
  • 45. 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 45
  • 46. 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 46
  • 47. NetBeans 6.5 BPEL Editor 47
  • 50. 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) 50
  • 51. Resources  Some contents are borrowed from the presentation slides of Sang Shin, Java™ Technology Evangelist, Sun Microsystems, Inc.  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 51
  • 52. Thank you thanachart.numnonda@sun.com twitter.com/thanachart www.facebook.com/thanachart 52