A Study on the Taxonomy of Service Antipatterns

1. A Study on the Taxonomy of
Service Antipatterns
Francis Palma and Naouel Moha
PPAP 2015, Montreal, Canada

2. Outline
- Introduction
- Related Work
- Current Catalog
- Classification of Service Antipatterns
- Relationships among Service Antipatterns
- Proposed Service Metrics
- Conclusion and Future Works

3. Outline
- Introduction
- Related Work
- Current Catalog
- Classification of Service Antipatterns
- Relationships among Service Antipatterns
- Proposed Service Metrics
- Conclusion and Future Works

4. Service-based Systems (SBSs)
“Service-based Systems (SBSs) are built on top of SOA principles
and are composed of services implemented with heterogeneous
technologies as their building blocks” [1]
A Study on the Taxonomy of Service Antipatterns 2
[1] Francis Palma, Mathieu Nayrolles, Naouel Moha, Yann-Gaël Guéhéneuc, Benoit Baudry, and Jean-Marc Jézéquel, SOA Antipatterns:
An Approach for their Specification and Detection, International Journal of Cooperative Information Systems (IJCIS, 2013).
- SOAP Web Services
- SCA Systems
- REST Services, and so on…

5. Service Antipatterns
Multi Service Tiny Service
“A common solution to a recurring problem that is usually ineffective and
highly counterproductive" [Andrew Koenig]
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6. Why their Detections are Important?
 to assess the design and quality of service of SBSs
 to ease the maintenance and evolution of SBSs
An in-depth understanding and relationships
among different service antipatterns is the first
and crucial step to perform their detection
A Study on the Taxonomy of Service Antipatterns 4

7. Benefits of Taxonomy
(1) assists in the specification and detection of service
antipatterns
(2) reveals the relationships among various groups of
service antipatterns
(3) groups together antipatterns that are fundamentally
related
(4) provides an overview of various system-level design
problems, etc.
A Study on the Taxonomy of Service Antipatterns 5

8. Outline
- Introduction
- Related Work
- Current Catalog
- Classification of Service Antipatterns
- Relationships among Service Antipatterns
- Proposed Service Metrics
- Conclusion and Future Works

9. Related Work
According to Fowler:
“a code smell is a
surface indication
that usually
corresponds to a
deeper problem in
the system”
6

10. Related Work
According to Fowler:
“a code smell is a
surface indication
that usually
corresponds to a
deeper problem in
the system”

11. Related Work
6
According to Fowler:
“a code smell is a
surface indication
that usually
corresponds to a
deeper problem in
the system”

12. Related Work
 previous contributions addressed OO code/design smells
 service smells/antipatterns (in the service domain) holds the
same notion to OO smells/antipatterns, but at the service-level
- service is coarser-grained and at higher-level of
abstraction than OO classes
 no taxonomy is proposed for service antipatterns in the literature
A Study on the Taxonomy of Service Antipatterns 7

13. Outline
- Introduction
- Related Work
- Current Catalog
- Classification of Service Antipatterns
- Relationships among Service Antipatterns
- Proposed Service Metrics
- Conclusion and Future Works

14. Catalog of Service Antipatterns
Online
resources,
Articles:
Books
A Study on the Taxonomy of Service Antipatterns 8

15. Catalog of Service Antipatterns
13 SCA-specific antipatterns
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
13 SCA-specific antipatterns
1. Multi Service
2. Tiny Service
3. Sand Pile
4. Chatty Service
5. The Knot
6. Nobody Home
7. Duplicated Service
8. Bottleneck Service
9. Service Chain
10. Data Service
11. God Component
12. Bloated Service
13. Stovepipe Service
10 Web service-specific antipatterns
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
10 Web service-specific antipatterns
1. God Object Web Service
2. Fine Grained Web Service
3. Ambiguous Name
4. Duplicated Web Service
5. Chatty Web Service
6. Low Cohesive Operations
7. Redundant Port-types
8. Maybe It is Not RPC
9. Data Web Service
10. CRUDy Interface
A Study on the Taxonomy of Service Antipatterns 9

16. Outline
- Introduction
- Related Work
- Current Catalog
- Classification of Service Antipatterns
- Relationships among Service Antipatterns
- Proposed Service Metrics
- Conclusion and Future Works

17. Classification of Service Antipatterns
 Classification of service antipatterns in two categories:
- Existential
- Intra-service (e.g., Multi Service)
- Inter-service (e.g., Service Chain)
- Analytical
- Static service antipatterns (e.g., Low Cohesive Operation)
- Dynamic service antipatterns (e.g., Bottleneck Service)
- Compound service antipatterns (e.g., Chatty Web Service)
 Service smells
- indicators of the presence of service antipatterns in SBSs
- lower-level design problems than antipatterns
- can be classified as measurable, structural, or lexical
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18. Classification of Service Smells in Web Services
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19. Classification of Service Smells in SCA
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20. Outline
- Introduction
- Related Work
- Current Catalog
- Classification of Service Antipatterns
- Relationships among Service Antipatterns
- Proposed Service Metrics
- Conclusion and Future Works

21. Relationships among Service Antipatterns
measurable, structural,
and lexical properties
service smells operator service antipatterns connector

22. Outline
- Introduction
- Related Work
- Current Catalog
- Classification of Service Antipatterns
- Relationships among Service Antipatterns
- Proposed Service Metrics
- Conclusion and Future Works

23. Proposed Service Metrics
Static
vs.
Dynamic
Structural
vs.
Behavioral
Web services
vs.
SCA
vs.
Both
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24. Detection of Service Antipatterns
 Step 1 (Specification):
- from metrics to metrics-based rule cards
 Step 2 (Generation)
- from rule cards to automatic generation of detection
algorithms
 Step 3 (Detection)
- apply detection algorithms on SBSs
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25. Outline
- Introduction
- Related Work
- Current Catalog
- Classification of Service Antipatterns
- Relationships among Service Antipatterns
- Proposed Service Metrics
- Conclusion and Future Works

26. Conclusion
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27. Conclusion
A Study on the Taxonomy of Service Antipatterns 16

28. Conclusion
A Study on the Taxonomy of Service Antipatterns 16

29. Conclusion
A Study on the Taxonomy of Service Antipatterns 16

30. Future Work
 analyse the taxonomy of other SBSs technologies
- RESTful services or WCF services
 develop a taxonomy visualisation tool
- interactive dynamics for visual analysis
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31. Questions ?