The Role of Coordination Analysis in Software Integration Projects Nuno F. Rodrigues Nuno Oliveira Luís S. Barbosa October 19-20, 2011 EI2N - Enterprise

The Role of Coordination Analysis in Software Integration Projects

Nuno F. Rodrigues

Nuno OliveiraLuís S. Barbosa

October 19-20, 2011 EI2N - Enterprise Integration, Interoperability and Networking

University of Minho

Portugal

• Adicionar printscreen do CoordInspector• Trabalhar melhor a maneira de passar do contexto para a

motivação • Explicar melhor o que é a coordination no nosso ponto de vista

• Introduzir melhor o que se entende por fazer perguntas aos developers…

2

Introduction

Companies

Fusion

Acquisition

Legacy

Software

Evolution

3


Google

Youtube

Blogger

Microsoft

Hotmail

Picasa

Skype

Introduction

• Composition of Different Software Systems• To obtain a Coherent Enterprise Solution

4


Software Solutions Integration

Enterprise Application Integration(EAI)

Introduction

5


Forrest Research

Motivation

6


Main Conceptual Issue:

COORDINATION MODEL(Between Systems)

Definition Implementation

Behaviour concerning

Network of Interactions

HelpsArchitects

AnsweringQuestions

• Which sub-systems are connected?

• How do they communicate?

• Which dependencies do exist?

Problem

7


Initial Strategy

BC

AD

F E

Final Implementation

BC

A D

F E

Objective

8


Final Implementation

Validation of(coordination component)

Integration Process

Feedback

Suggestion ofAlternatives

Reconstructed Coordination Model

Outline• CoordInspector

• Methodology• Coordination Patterns• Extracting Strategy

• Integration Analysis Strategy

• Integration Analysis - Example

• Conclusion

9


CoordInspector

• Tool to extract (from source code) the network of interactions

• Coordination Layer

• Extraction based on • Slicing Techniques• Graph algorithms

• Search for Coordination Patterns

10

CoordInspector

• Accepts CIL code

• Analyses systems developed in (combinations of) more than 40 languages compliant with the .NET platform

Transforms in into:• Managed System Dependence Graphs (MSDG)

• Coordination Dependence Graphs (CDG)• Hold information about coordination

11





• Conclusion

12


Coordination Pattern

13

A Coordination Pattern is an equivalence class, a

shape or sub-graph of a Coordination Dependence

Graph, corresponding to a trace of coordination

policies left in the system code.


Coordination Pattern

• Client orders execution of an operation in a thread x• Launches thread y to retrieve results• Performs service call until result arrives (loop)

14

Asynchronous Query Pattern With Client Multithreading

Aqpcm( n1 | n3, n4) { node n1, n2, n3, n4 = {…}; fork f; root n1;

{f -(x,y)-> (n3,n4)}@[n4 | ] {n1 –x-> f, n4 -y-> n2, n2 –y-> n4}}

CoordL


Extracting Strategy

15


Source Code

MSDG

CDG

Source Code (Coordination Layer)

(labeling)

(pruning)

(search for coordination patterns)





• Conclusion

16


Integration Analysis Strategy

• Post-Integration• Analysis of post-integration coordination model• Comparison with pre-integration coordination model

• 4-steps Strategy

17



18


1. Identify basic coordination solutions (patterns) used during integration

Documentation Analysis

Developers Interview

2. Specify each coordination pattern (identified in step 1)

CoordL notation

Diagrammatical notation


19


3. Search for each coordination pattern in source code of Integrated System

CoordInspector

4. Identify cases of mismatch between pre- and post-integration models

Analyse

Document

Discuss Alternatives





• Conclusion

20


Integration Analysis - Example• Professional training company

• 6 facilities distributed in the country

• 4 (isolated) base components• ERP - Enterprise Resource Planner• CRM - Costumer Relationship Management• TS - Training Server• DSM - Document Management System

• Objective: • Web-Portal for online selling of training courses

21


Integration Analysis - Example

22


Problem found: inconsistent User UpdateComponent: Web-PortalPattern: User Update Operation

Integration Analysis - Example

23






• Conclusion

24


Conclusion

25


Tool-based methodology to extract Coordination Model

and on identifying Coordination Patterns

based on Slicing Techniques

Conclusion

26


Integrated in a strategy for Software Integration Analysis

and allows for the suggestion of Improvement Alternatives

which provides useful Feedback

Conclusion

27


In case study

- Unwanted multiple creations of users

Identified and Corrected coordination problems:

- Lack of parallelism leading to delays

- Deadlocks

Conclusion (Future Work)

• CoordInspector

• Live modification of source code by edition of extracted graphs

• Performance study concerning different integration scenarios

28


The Role of Coordination Analysis in Software Integration Projects

Nuno F. Rodrigues

Nuno OliveiraLuís S. Barbosa


Documents

The Role of Coordination Analysis in Software Integration Projects Nuno F. Rodrigues Nuno Oliveira Luís S. Barbosa October 19-20, 2011 EI2N - Enterprise