Maryam Razavian: A Frame of Reference for SOA Migration

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

Authors
Maryam Razavian
Patricia Lago
23-27 November 2009

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

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

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

Understanding SOA Migration using a Framework
6

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

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

Roadmap
Systematic Review
Industrial Survey
9

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

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

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

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

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

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

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

Mappings on SOA-MF
19

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

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

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

SOA Migration Themes
23

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%

How does it help?
25
How to do?
What process
What to do?
What activities
SOA Migration
What knowledge?

What types of knowledge shape SOA migration?
26

27

e.g. business services, functional ontology
e.g. business processes, business scenarios
28

How does it help?
29
How to do?
What process
What to do?
What activities
SOA Migration
What knowledge?

Roadmap
Systematic Review
Industrial Survey
30

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

What Families Occur in Practice
32

SOA Migration Themes - Practice
33
Bowl-shaped approaches

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

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

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

Thanks!
37

Maryam Razavian: A Frame of Reference for SOA Migration

by ServiceWave 2010 on Dec 30, 2010

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Maryam Razavian: A Frame of Reference for SOA Migration — Presentation Transcript