130905 francis palma - detection of process antipatterns - a bpel perspective
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130905 francis palma - detection of process antipatterns - a bpel perspective
- 1. Detection of Process Antipatterns: An BPEL Perspective Francis Palma, Naouel Moha, and Yann-Gaël Guéhéneuc MRI-BP 2013 Ptidej Team, École Polytechnique de Montréal, Canada Latece, Université du Québec à Montréal, Canada
- 2. Context Context • Service Oriented Architecture (SOA) Motivation Related Work • Service-based systems (SBSs) • Business Process Modeling Notation (BPMN) • Business Process Execution Language (BPEL) Approach Experiments • Service orchestration using control logics • Design patterns and Antipatterns Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 2 of 21
- 3. Context Users Client application BPEL Engine Web services Context messages BPEL Process messages Motivation Related Work Approach Experiments Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 3 of 21
- 4. Context Users Client application BPEL Engine Web services Context messages BPEL Process messages Motivation Related Work BPMN model Approach Experiments Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 3 of 21
- 5. Context Client application Users BPEL Engine Web services Context messages BPEL Process messages Motivation Related Work BPMN model Approach Experiments Conclusion Early design anomalies September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 3 of 21
- 6. Context Client application Users BPEL Engine Web services Context messages BPEL Process messages Motivation Related Work BPEL process BPMN model Approach Experiments Conclusion Early design anomalies September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 3 of 21
- 7. Context Client application Users BPEL Engine Web services Context messages BPEL Process messages Motivation Related Work Transformation errors BPEL process BPMN model Approach Experiments Conclusion Early design anomalies September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 3 of 21
- 8. Context Client application Users BPEL Engine Web services Context messages BPEL Process messages Motivation Related Work Transformation errors BPEL process BPMN model Approach Experiments Conclusion Early design anomalies September 10, 2013 Conceptual mismatch Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 3 of 21
- 9. Context Client application Users BPEL Engine Web services Context messages BPEL Process messages Motivation Related Work Evolution Evolution Transformation errors BPEL process BPMN model Approach Experiments Conclusion Early design anomalies September 10, 2013 Conceptual mismatch Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 3 of 21
- 10. Context Client application Users BPEL Engine Web services Context messages BPEL Process messages Motivation Related Work Evolution Evolution Transformation errors BPEL process BPMN model Approach Antipatterns! Experiments Conclusion Early design anomalies September 10, 2013 Conceptual mismatch Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 3 of 21
- 11. Context Users Client application BPEL Engine Web services Context messages BPEL Process messages Motivation Related Work Evolution Evolution Transformation errors BPEL process hard to maintain and evolve BPMN model Approach Antipatterns! Experiments Conclusion September 10, 2013 bad quality of service poor design Early design anomalies Conceptual mismatch Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 3 of 21
- 12. Context: Process Antipatterns Context Start Deadlock!!! Motivation Related Work (a) Deadlocks Through Decision-Join Pairs Approach Experiments Conclusion September 10, 2013 (A,B) D (A,B,C) (b) Dangling Inputs and Outputs Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 4 of 21
- 13. Outline Context Context Motivation Motivation Related Work Approach Experiments Conclusion September 10, 2013 Related Work Approach Experiments Conclusion Palma et al. | Detection of Process Antipatterns: An BPEL Perspective
- 14. Outline Context Context Motivation Motivation Related Work Approach Experiments Conclusion September 10, 2013 Related Work Approach Experiments Conclusion Palma et al. | Detection of Process Antipatterns: An BPEL Perspective
- 15. Motivation: Why Antipatterns Context Motivation • Antipatterns: - From wrong design decisions to poor solutions • Poor solutions result: Related Work Approach - bad quality of service (QoS) - less maintainability, evolvability etc. • Detect antipatterns within processes Experiments • Improve design and QoS Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 5 of 21
- 16. Motivation: Why BPEL ? Context Motivation Related Work • BPEL processes are off-the-shelf entities, BPMN is more documentation related - transition often broken, not symmetric • Ideologically, antipatterns in BPMN and BPEL processes represents same semantics, but some syntactic differences exist • Antipatterns in models (BPMN) already got much attention in the literature: - target audience: business analysts Approach Experiments Conclusion September 10, 2013 • Conceptual mismatch between BPMN and BPEL - differ in control flow support, e.g., loops, splits, joins, etc. • Transformation errors and early design errors: - translation, adaptation, and–or implementation errors - errors by business analysts Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 6 of 21
- 17. Outline Context Context Motivation Motivation Related Work Approach Experiments Conclusion September 10, 2013 Related Work Approach Experiments Conclusion Palma et al. | Detection of Process Antipatterns: An BPEL Perspective
- 18. Related Work (1/2) Context Motivation Related Work Approach Experiments Conclusion September 10, 2013 Model Antipatterns: - Onoda et al. (1999): catalog of 5 deadlock patterns - Persson et al. (2006) and Stirna et al. (2009): 6 process patterns and 13 process antipatterns - Koehler and Vanhatalo (2007): 14 structural antipatterns in process models - Trcka et al. (2009): formalized 9 process antipatterns using temporal logic Detection of Model Antipatterns: - Gruhn and Laue (2010): heuristic-based approach for discovering problems in BPMs - Laue and Awad (2010): visually represented process antipatterns Process Patterns: - Wohed et al. (2002): analysed BPEL4WS based on workflow and communication patterns - Aalst et al. (2003): discussed 26 control flow, branching-synchronization, and structural patterns Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 7 of 21
- 19. Related Work (2/2) Identified gaps from the literature: Context Motivation Related Work Approach Experiments - Antipatterns and detection approaches were considered only for BPMN models - No other formal specifications for process antipatterns except the one by Trcka et al. (2009) - Various quality aspects (e.g., availability or response time of Web services) were not considered - No automatic detection approach for BPEL process antipatterns until now Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 8 of 21
- 20. Outline Context Context Motivation Motivation Related Work Approach Experiments Conclusion September 10, 2013 Related Work Approach Experiments Conclusion Palma et al. | Detection of Process Antipatterns: An BPEL Perspective
- 21. Solution towards detection Context Motivation Related Work Approach Experiments • We propose to: - specify process antipatterns using classical Rules of Inference - define a concrete approach • We perform a small detection experiment - seven antipatterns, three example BPEL processes - show results for two antipatterns Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 9 of 21
- 22. Approach (1/5) Context Motivation Related Work Approach Experiments Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 10 of 21
- 23. Approach (2/5): Specify Rules Context Start Motivation Related Work Approach Experiments Conclusion September 10, 2013 (A,B) D (A,B,C) Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 11 of 21
- 24. Approach (3/5): Process Transform Context Motivation • Process transformation (more abstract and simplified) (a) from the original BPEL to a simplified BPEL Related Work Approach Experiments (b) from the simplified BPEL to a generic model • Goal of this transformation is to ease: - implementation of the rules - further analysis of the processes Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 12 of 21
- 25. Approach (4/5): Process Transform Context Motivation (a) Related Work Approach Experiments Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 13 of 21
- 26. Approach (4/5): Process Transform Context Motivation (a) Related Work Approach Experiments (b) Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 13 of 21
- 27. Approach (5/5): Detection Context Motivation Related Work Approach Experiments Conclusion • The implementation of rules • Applying implemented algorithms on transformed models • Detection is now semi-automatic September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 14 of 21
- 28. Outline Context Context Motivation Motivation Related Work Approach Experiments Conclusion September 10, 2013 Related Work Approach Experiments Conclusion Palma et al. | Detection of Process Antipatterns: An BPEL Perspective
- 29. Experiments (1/5): Objects travelProcess 3 Web services 7 I/O Var salesProcess auctionProcess 3 Web services 6 I/O Var 2 Web services 4 I/O Var Context Motivation Related Work Approach Experiments Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 15 of 21
- 30. Experiments (2/5): Subjects Context Motivation Related Work Approach Experiments Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 16 of 21
- 31. Experiments (3/5): Results Context no detection N/A no detection N/A Motivation Related Work Approach Experiments Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 17 of 21
- 32. Experiments (3/5): Results Context no detection N/A no detection N/A Motivation Related Work Approach Experiments Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 17 of 21
- 33. Experiments (4/5): Results (cont.) Context Motivation Related Work Approach Experiments Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 18 of 21
- 34. Experiments (4/5): Results (cont.) Context Motivation Related Work Approach Experiments Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 18 of 21
- 35. Experiments (5/5): Threats to Validity Context Motivation External validity: Possibility to generalize the results for other large and realistic business processes Related Work Approach Experiments Construct validity: Different engineers might define rules differently Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 19 of 21
- 36. Outline Context Context Motivation Motivation Related Work Approach Experiments Conclusion September 10, 2013 Related Work Approach Experiments Conclusion Palma et al. | Detection of Process Antipatterns: An BPEL Perspective
- 37. Conclusion Context Motivation Related Work Approach Experiments Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 20 of 21
- 38. Conclusion Context Motivation Related Work Approach Experiments Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 20 of 21
- 39. Conclusion Context Motivation Related Work Approach Experiments Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 20 of 21
- 40. Conclusion Context Motivation Related Work Approach Experiments Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 20 of 21
- 41. Future work Context Motivation • Perform experiments on other large and complex business processes - Limitation: availability of business processes Related Work Approach Experiments • Automate the approach • Detect more process antipatterns • Analyse the processes dynamically Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 21 of 21
- 42. Thanks for your attention! Questions?
- 43. Context Motivation Related Work Approach Experiments Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 16 of 21
- 44. Experiments (4/5): Results (cont.) Context salesProcess travelProcess Motivation Related Work Approach Experiments Conclusion September 10, 2013 Palma et al. | Detection of Process Antipatterns: An BPEL Perspective 16 of 21