specification and detection of soa antipatternssofa.uqam.ca/media/icsoc2012short.pdf · mathieu...

1 LATECE , Département d'informatique, Université du Québec à

Montréal, Canada 2 Ptidej Team, DGIGL, École Polytechnique de Montréal, Canada

3 CESI.eXia, Ecole Supérieur d'Informatique, France

1,3 1,2 1 2

Problem Context (1/2)

2/22

HTTP, SOAP, WSDL, UDDI, WS-Technologies

Service Based Systems (SBSs) evolve to fit new user requirements, execution

contexts:

- may degrade design and quality of service (QoS)

- may cause the appearance of common poor solutions:

Antipatterns

Mathieu Nayrolles SODA: A Tool Support for the Detection of SOA Antipatterns

Service Requester

Service Provider

Service-based System

Problem Context (2/2)

Examples of SOA Antipatterns:

Tiny Service: Small service with few methods which requires several coupled

services to complete an abstraction.

Multiservice: Implements a multitude of methods, is not easily reusable

because of low cohesion of its methods, is often unavailable due to overload

Tiny Service Multiservice

Mathieu Nayrolles SODA: A Tool Support for the Detection of SOA Antipatterns 3/22

Introduction : Contribution

With the goal to detect SOA Antipatterns in SBSs:


- SODA (Service Oriented Detection for Antipatterns), a novel and innovative

approach

- SOFA (Service Oriented Framework for Antipatterns), a framework,

- to specify SOA antipatterns and detect them automatically

- to perform static and dynamic analysis

- SODA tool to perform detection using a Graphical User Interface (GUI)

SODA Approach

SOFA Framework

SODA tool

GUI

4/22

SODA : Our Approach

SODA: Service Oriented Detection for Antipatterns

Textual

Description of

Antipatterns

1. S

pecif

icati

on

s

Rule

Card

2. G

en

era

tio

n

Detection

Algorithm

3.

Dete

cti

on

Suspicious

Services


SBS Template

5/22

Approach (7/9): Underlying Framework

1

Mathieu Nayrolles Specification and Detection of SOA Antipatterns

Main Components:

(1) Automated generation of detection algorithms

(2) Computation of static and dynamic metrics

(3) Specification of rules

SOFA : UNDERLYING FRAMEWORK (1/3)

6/22


2


Main Components:


(2) Computation of all static and dynamic metrics



7/22


3


Main Components:


(2) Computation of all static and dynamic metrics



8/22

SODA Tool: Principal Features


- Direct import of an scripted SBS

- Straight forward detection interface

- Expose all the detection details, e.g., metric values, rule cards and textual

descriptions of antipatterns

- Supports both well-known metric based & execution traces based analysis

- Exposes all the execution traces, association rules and related details

9/22

Associations Rules

2 layers of abstraction : - By service : ServA -> ServB - By methods : ServA.mA->ServB.mB

10/22

SODA Tool (1/7)

11 Mathieu Nayrolles SODA: A Tool Support for the Detection of SOA Antipatterns

Enlists the SOA

antipatterns

that can be

detected.

11/22

SODA Tool (2/7)


Textual

description

for selected

antipattern.

12/22

SODA Tool (3/7)


Corresponding

rule card.

13/22

SODA Tool (3/7): Rule Card


Corresponding

rule card.

“Multi Service corresponds to a service that implements a multitude of methods related

to different business and technical abstractions. This aggregates too much into a single

service, such a service is not easily reusable because of the low cohesion of its methods

and is often unavailable to end-users because of its overload, which may induce a high

response time”

Multi Service example definition:

1 RULE CARD: MultiService {

2 RULE: MultiService { INTER MultiMethod HighResponse LowAvailability LowCohesion };

3 RULE: MultiMethod { NMD VERY HIGH };

4 RULE: HighResponse { RT VERY HIGH };

5 RULE: LowAvailability { A LOW };

6 RULE: LowCohesion { COH LOW };

7 };

Corresponding Rule Card:

14/22

SODA Tool (4/7)


Results,

i.e., suspicious

service(s)

15/22

SODA Tool (5/7)


Values for all metrics

(from the associated

rule card), for each

service

16/22

SODA Tool (6/7)


Exposes the

generated

association

rules.

17/22

SODA Tool (7/7)


Helps to visualize

the suspicious

service(s) within

the analyzed SBS.

18/22

Experiments (4/5): Objects

Two different versions of Home-Automation:

- Original version with 13 services

- A version modified by adding & modifying services to inject Antipatterns


SODA Tool (7/7) Results (1/3): Detection

19/22

Results (2/3): Detection

Detection of Multiservice: Mediator

Mathieu Nayrolles SODA: A Tool Support for the Detection of SOA Antipatterns 20/22

Results (3/3): Detection

Detection of Duplicated Service: Mediator and Communication

21 Mathieu Nayrolles SODA: A Tool Support for the Detection of SOA Antipatterns 21/22

Demonstration

- Video

- Posters

- Live demo

22/22

Thank you

More about SODA at www.sofa.uqam.ca/tool.html

Mathieu Nayrolles | [email protected]

Francis Palma | [email protected]

Naouel Moha | [email protected]

Yann-Gaël Guéhéneuc | [email protected]

mailto:[email protected]






specification and detection of soa antipatternssofa.uqam.ca/media/icsoc2012short.pdf · mathieu...

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