Maryam Razavian: A Frame of Reference for SOA Migration

1. A Frame of Reference for SOA Migration Maryam Razavian VU University Amsterdam 13-15 December 2010 ICSOC-ServiceWave 2009

3. Patricia Lago 23-27 November 2009 ICSOC-ServiceWave 2009

4. Roadmap Introduction on SOA Migration What do we know in academia Systematic Review What do we know in industry Industrial Survey 3

5. Migration of Legacy Systems to SOA Migrate Pre-existing enterprise assets Service-based Systems 4

6. SOA Migration: Problem areas 5 How to do? What process What to do? What activities SOA Migration What knowledge? What are the inputs and outputs

7. Understanding SOA Migration using a Framework 6

8. SOA-MF: Positioning and Categorizing Approach B Approach A 7

9. Understanding SOA Migration using SOA-MF SOA Migration Framework (SOA-MF) 8

10. Roadmap Introduction on SOA Migration What do we know in academia Systematic Review What do we know in industry Industrial Survey 9

11. What SOA migration entails in theory Goal: What types of SOA migration exist in the field? Research Method: Systematic Literature Review Why? Methodological rigor in aggregating existing SOA migration approaches Minimizing the bias in review process  extraction of sound migration categories 10

12. Systematic Review Process Stages Planning the review Conducting the review Reporting the review Research Questions Search Process Selection of Primary Studies RQ) What methods/processes/approaches regarding legacy to SOA migration, have been proposed in research community so far? 11

13. Review Protocol Planning the review Search Process Selection of Primary Studies Research Questions Search Query: ( migration OR …[ related terms]) AND (legacy system OR …) AND ( SOA OR …) Data Sources: digital libraries (IEEE Explore, ACM digital library, ISI …) Search Scope: titles and abstracts 12

14. Related Terms for the Keywords Search Query ("SOSE" OR "SOA" <or> "service computing" <or>"service based" <or> "service centric" <or>"service engineering" <or>"service oriented " <or> "service oriented architecture" <or> "service oriented software engineering" or "service") AND ("legacy" <or> "legacy code" <or>"legacy system" <or>"existing system" <or>"legacy component" <or> "existing code" <or>" existing asset" <or>"existing component" <or>"pre-existing code" <or>"pre-existing system" <or>"pre-existing component") <and>("migrate" <or> "migration" <or>"modernization" OR "transformation" <or>"reengineering") <and> (pyr >= 2000 <and> pyr <= 2009) 13

15. Review Protocol Planning the review Search Process Selection of Primary Studies Research Questions Inclusion Criteria: I1) A study that is about migration to services I2) A study that addresses migration from pre-existing legacy assets I3) A study that proposes a solution for migration 14

16. Review Results Conducting the review 39 Primary Studies Distribution of primary studies published by year The full list of primary studies is available at http://www.few.vu.nl/~mrazavi/SOAMigrationAppendix.pdf 15

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19. Qualitative Data Analysis Qualitative Data Analysis: Coding to achieve mapping on SOA-MF 18

20. Mappings on SOA-MF 19

21. 8 families of SOA Migration Service Identification Family Forward Engineering with Design Element Transformation Family 20

22. What do the families imply? What are general types of solution in this family? To what extent the reverse engineering, transformation and forward engineering occurs? What activities are carried out? What artifacts are used and produced? 21

23. How does it help? 22 How to do? What process What to do? What activities SOA Migration What knowledge? What are inputs and outputs

24. SOA Migration Themes 23

25. SOA Migration Themes 24 Arch-shaped approaches Bowl-shaped approaches Migration for Modernization: renovate existing system to reconstitute it in new form 65% Migration for reuse in service-based development:facilitating reuse in building new service-based systems 35%

26. How does it help? 25 How to do? What process What to do? What activities SOA Migration What knowledge? What are inputs and outputs

27. What types of knowledge shape SOA migration? 26

28. What types of knowledge shape SOA migration? 27

29. What types of knowledge shape SOA migration? e.g. business services, functional ontology e.g. business processes, business scenarios 28

30. How does it help? 29 How to do? What process What to do? What activities SOA Migration What knowledge? What are inputs and outputs

31. Roadmap Introduction on SOA Migration What do we know in academia Systematic Review What do we know in industry Industrial Survey 30

32. What SOA Migration entails in Practice? Study: What Type of SOA Migration are You? 6 different leading companies in SOA solutions participated SOA Migration Projects (both consultancy and in house) 10 interviews with senior architects (1 hour) Both enterprise and technical architects 31

33. What Families Occur in Practice 32

34. SOA Migration Themes - Practice 33 Bowl-shaped approaches

35. SOA Migration Themes - Practice 1. Migration for Reuse: I want to modernize my current system to SOA 2. Migration for Integration: I want to integrate my existing applications using SOA technology + + SO analysis and design drives integration Wrapping the whole application (or segments) Temporary wrapping existing assets Understanding existing business processes 34

36. What did we Learn? All bowl-shaped Forward Engineering leg is covered Focus on top most transformation level Transformation at different levels: Enterprise Architecture Transformation, Business Process Transformation Incremental SOA Migration Enterprise architecture drives SOA Migration 35

37. Conclusions and Outlook Industrial Survey: What are the main types of migration in practice, What is different Systematic Review What we know of SOA migration in the literature Case Study: Explore the general practices in industry Next Step 36

38. Thanks! 37

39. ICSOC-ServiceWave 2009