BPA Suite to BPEL: a Case Study. Lonneke Dikmans November 2011 Nuremberg, Germany

Transcription

1 BPA Suite to BPEL: a Case Study Lonneke Dikmans November 2011 Nuremberg, Germany 1 29 x

2 Vennster Integrated approach from three perspectives Senior consultants with specific expertise and industry knowledge Add value, share knowledge Partnership Lonneke Dikmans is Oracle Ace Director Human Business IT 2 29 x

3 Agenda BPA to BPEL: a case study Introduction Context Modeling the processes: BPMN Executing the processes: BPEL Case Design perspective Development perspective Licensing perspective Conclusion Do it again? 3 29 x

4 Context Province Overijssel Province inhabitants 26 municipalities 1000 employees 10 units (roads, culture, agriculture etc) grants, permits, development SOA and BPM NORA, PETRA, ORA Dutch case management 4 29 x

5 Context Project Process Grants and permits Based on a standardized case management process Tooling Oracle SOA Suite11g Oracle BPA Suite11g COTS case metadata system 5 29 x

6 Agenda BPA to BPEL: a case study Introduction Context Modeling the processes: BPMN Executing the processes: BPEL Case Design perspective Development perspective Licensing perspective Conclusion Do it again? 6 29 x

7 Modeling the process: BPMN Tool Process modeling Model the processes in BizAgi Free, used as input for the bidding process-> no middleware yet! 7 29 x

8 Modeling the process: BPMN Intake 8 29 x

9 Modeling the process: BPMN BPMN Objects Activities (Task, sub process) Events (Start, Intermediate, End) Gateways (If, Parallel) Flow (Sequence, message) Roles Lanes and pools 9 29 x

10 Agenda BPA to BPEL: a case study Introduction Context Modeling the processes: BPMN Execution of the processes: BPEL Case Design perspective Development perspective Licensing perspective Conclusion Do it again? x

11 Executing the processes: BPEL Tool BPEL Development Develop the process in JDeveloper Based on the process models x

12 <!-- HelloWorld BPEL Process --> <process name="helloworld" targetnamespace=" suppressjoinfailure="yes" xmlns:tns=" xmlns=" xmlns:bpws=" > <!-- List of services participating in this BPEL process --> <partnerlinks> <!-- The 'client' role represents the requester of this service. It is used for callback. The location and correlation information associated with the client role are automatically set using WS-Addressing. --> <partnerlink name="client" partnerlinktype="tns:helloworld" myrole="helloworldprovider" partnerrole="helloworldrequester" /> </partnerlinks> <!-- List of messages and XML documents used as part of this BPEL process --> <variables> <!-- Reference to the message passed as input during initiation --> <variable name="input" messagetype="tns:helloworldrequestmessage"/> <!-- Reference to the message that will be sent back to the requestor during callback --> <variable name="output" messagetype="tns:helloworldresultmessage"/> </variables> <!-- Orchestration Logic --> <sequence> <!-- Receive input from requestor. Note: This maps to operation defined in HelloWorld.wsdl --> <receive name="receiveinput" partnerlink="client" porttype="tns:helloworld" operation="initiate" variable="input" createinstance="yes"/> <!-- Generate content of output message based on the content of the input message. --> <assign> <copy> <from expression="concat('hello ',bpws:getvariabledata('input', 'payload','/tns:name'))"/> <to variable="output" part="payload" query="/tns:result"/> </copy> </assign> <!-- Asynchronous callback to the requester. Note: the callback location and correlation id is transparently handled using WS-addressing. --> <invoke name="replyoutput" partnerlink="client" porttype="tns:helloworldcallback" operation="onresult" inputvariable="output" /> </sequence> </process> x

13 Executing the processes: BPEL Transform BPMN in BPA BPEL Remark Activity Scope Including calls to service Start event End event Gateway Receive activity Pick Separate process Invoke, reply, throw, compensation, termination Switch, pick, or flow If no trigger If multiple If timer Depends on the result type. If none is modeled, no activity is generated in BPEL Depending on type of gateway and flow object that follows gateway x

14 Executing the processes: BPEL Transform BPMN in BPA BPEL Remark Connecting objects Sub process N.A Invoke activity, not scope See spec for some exceptions Swim lanes N.A Don t exist in BPEL. Tasks are assigned to correct role Business data Variables Not often available x

15 Executing the processes: BPEL Transform DEMO BPA Suite -> Oracle JDeveloper 1. Create a BPA Suite database 2. Model a process 3. Create a blueprint 4. Import blueprint in JDeveloper 5. Technical implementation x

16 Agenda BPA to BPEL: a case study Introduction Context Modeling the processes: BPMN Execution of the process: BPEL Case Design perspective Development perspective Licensing perspective Conclusion Do it again? x

17 Design perspective Considerations Process models Main process and sub processes (intake, process, decide, deliver) How to handle user interaction versus process flow Translation from BPMN to BPEL How to handle ad-hoc tasks Error handling Governance Ease of use of modeling tool Versioning of models and code Change management Match process models and code x

18 Design perspective Findings Incorrect use of BPMN (syntax and semantic errors) No start event Use of signal instead of message Scope / subject of process (one grant versus an arrangement) No Layering Missing overall process business versus implementation view Impedance mismatch No go to in BPEL Two start events Technical decisions in the process model; what to automate how Different target audience (business analyst versus developer) x

19 Agenda BPA to BPEL: a case study Introduction Context Modeling the processes: BPMN Execution of the processes: BPEL Case Design perspective Development perspective Licensing perspective Conclusion Do it again? x

20 Development Considerations Decide on relationship SCA BPMN process One SCA for all BPMN processes One SCA per BPMN process One SCA per BPMN process plus sub processes Guidelines No composite in a composite possible in SOA Suite 11g If a process is callable (reusable) from multiple other processes use separate SCA Otherwise (embedded) generate BPEL in same SCA Can t design this just in BPA Suite x

21 Example BPMN process with reusable sub process SendDocuments: called in multiple (sub) processes BPMN process with embeded sub process FirstRequest: embedded in process request x

22 Development perspective Findings Use of CDM in BPEL Too much data for BPEL (not for SCA) Changes have huge impact (assigns, XSLT, partnerlinks) WSDLs and XSDs get copied into project instead of use of MDS On Message event BPEL onmessage or Pick activity (for retry and error handling) Ending a process Business error solved by technical error Loosing the connection One BPEL is connected to one BPA database x

23 Development perspective Terminate This is generated incorrectly: x

24 Development perspective Terminate See BPEL example x

25 Agenda BPA to BPEL: a case study Introduction Context Modeling the processes: BPMN Execution the processes: BPEL Case Design perspective Development perspective Licensing perspective Conclusion Do it again? x

26 Licensing perspective Partner & Customer Oracle SOA Suite versus Oracle BPM Suite At the time, Oracle very focused on Oracle SOA Suite. Business analyst activities versus development activities Case management versus BPM unclear at customer Software AG versus Oracle Need for Archimate plug-in. Not offered by Oracle Unclear architecture, versus business architecture, versus BPM versus process design Software AG up selling after the deal x

27 Agenda BPA to BPEL: a case study Introduction Context Modeling the processes Case Design perspective Development perspective Licensing perspective Conclusion Do it again? x

28 Conclusion BPA Suite to BPEL Governance Need business analyst during development Stay connected or start over from scratch Very little to no support from Oracle Policy: Software AG makes money on training Partners are not enabled Little knowledge BPA Suite modeling experience is not very good Technical Need both BPMN and BPEL knowledge During design and development Design as little technical detail as possible in BPMN diagrams x

29 Conclusion do it again? Yes No good alternative for business in control No good alternative for business architecture BPM link Cheaper than Oracle BPM studio Proven technology (both BPA Suite and BPEL) No Oracle BPM Suite is better fit Oracle is committed to Oracle BPM Suite Having multiple vendors is nightmare for organization x

30 BPA Suite to BPEL: a Case Study Lonneke Dikmans November 2011 Nuremberg, Germany x