External And Internal Events In EPCs: E²EPCs
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External And Internal Events In EPCs: E²EPCs






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External And Internal Events In EPCs: E²EPCs External And Internal Events In EPCs: E²EPCs Presentation Transcript

  • 2nd International Workshop on Event-Driven Business Process Management edBPM09 – http://icep-edbpm09.fzi.de/ External and Internal Events in EPCs: e²EPCs Oliver Kopp, Matthias Wieland, Frank Leymann Institute of Architecture of Application Systems kopp@iaas.uni-stuttgart.de
  • Motivation We created a development method for workflow based applications based on event-driven service-oriented architectures (SOEDA) Wieland, M., Martin, D., Kopp, O., Leymann, F.: SOEDA: A Methodology for Specification and Implementation of Applications on a Service-Oriented Event-Driven Architecture. In: BIS 2009. (2009) SOEDA uses MDA (Model-Driven Architecture) approach Save development time by automated transformations Transformation of EPCs to detailed abstract BPEL workflows SOEDA Methodology steps Step 1: Process Definition Step 2: Complex Event Extraction Step 3: Process to Workflow Transformation Step 4: CEP Rules Specification Step 5: Executable Completion Presented by Matthias Wieland
  • SOEDA - High-Level Architecture Event e1 event specification Business process relevant complex events e1 e2 Specification Function layer f1 s1 m1 f1e s2 transformation Event e2 event specification Low Level Events automatic BPEL engine CEP System <process> Event e1: <receive e1 ... > event select avg(price) from <invoke f1 ...> notification Execution OrderEvent.win:time <receive e2 ...> layer (30 sec) </process> Automatic transformation based on: Vanhatalo, J., Völzer, H., Koehler, J.: The Refined Process Structure Tree. In: BPM 2008, Springer (2008) Presented by Matthias Wieland
  • Problem All EPC events are treated the same way in the automatic transformation For every event a complex event description has to be defined All events have to be observed by a CEP system But: Many events are process internal events Could be handled “inside” the workflow without CEP system Manual optimization required We need a EPC transformation that distinguishes external and internal events Presented by Matthias Wieland 4
  • Example External event, triggered by external system Internal event, triggered by process data Adapted from: Scheer, A.W. & Thomas, O. & Adam, O.: Process Modeling Using Event-Driven Process Chains. In: Process-Aware Information Systems: Bridging People and Software Through Process Technology. Wiley & Sons (2005) Presented by Matthias Wieland 5
  • Current Transformation Approaches 6
  • Drop Intermediate Events Mendling, J. et al, 2008 ARIS Toolset (Stein, S. & Ivanov, K. 2007) Presented by Matthias Wieland 7
  • Drop Start and End Events Kopp, O. et al., 2006 Specht, T. et al., 2005 Ziemann, J. et al., 2005 Presented by Matthias Wieland 8
  • Interpret all Events as External Events SOEDA: Wieland, M. et al., 2009 Presented by Matthias Wieland 9
  • Summary Presented by Matthias Wieland 10
  • Our new Approach: e²EPCs 11
  • Input: e²EPCs Explicit distinction between internal and external events by new annotations (red lines) in eEPC Aim: Keep change of eEPC notation as small as possible – only following two new connections allowed External event with organizational unit Internal event with process data Alternatives Store type in repository Place in swim lanes Presented by Matthias Wieland 12
  • Transformation Result Presented by Matthias Wieland 13
  • Possible Annotations Presented by Matthias Wieland 14
  • Transformation Overview Presented by Matthias Wieland 15
  • BPEL4Chor Result Presented by Matthias Wieland 16
  • Conclusion and Outlook Motivated why events in EPC should be distinguished between internal and external ones Showed extension of eEPC notation for modeling internal and external events: e²EPCs Showed an adequate automatic transformation to WS-BPEL and BPEL4Chor Future Work: Evaluation of the Approach Annotation or annotation in the repository? Chaining of EPCs? End Event: invoke instead of receive Presented by Matthias Wieland 17