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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
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• 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…
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Introduction
Companies
Fusion
Acquisition
Legacy
Software
Evolution
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October 19-20, 2011 EI2N - Enterprise Integration, Interoperability and Networking
Youtube
Blogger
Microsoft
Hotmail
Picasa
Skype
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Introduction
• Composition of Different Software Systems• To obtain a Coherent Enterprise Solution
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Software Solutions Integration
Enterprise Application Integration(EAI)
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Introduction
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Forrest Research
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Motivation
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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?
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Problem
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October 19-20, 2011 EI2N - Enterprise Integration, Interoperability and Networking
Initial Strategy
BC
AD
F E
Final Implementation
BC
A D
F E
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Objective
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Final Implementation
Validation of(coordination component)
Integration Process
Feedback
Suggestion ofAlternatives
Reconstructed Coordination Model
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Outline• CoordInspector
• Methodology• Coordination Patterns• Extracting Strategy
• Integration Analysis Strategy
• Integration Analysis - Example
• Conclusion
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CoordInspector
• Tool to extract (from source code) the network of interactions
• Coordination Layer
• Extraction based on • Slicing Techniques• Graph algorithms
• Search for Coordination Patterns
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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
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Outline• CoordInspector
• Methodology• Coordination Patterns• Extracting Strategy
• Integration Analysis Strategy
• Integration Analysis - Example
• Conclusion
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October 19-20, 2011 EI2N - Enterprise Integration, Interoperability and Networking
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Coordination Pattern
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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.
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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)
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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
October 19-20, 2011 EI2N - Enterprise Integration, Interoperability and Networking
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Extracting Strategy
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October 19-20, 2011 EI2N - Enterprise Integration, Interoperability and Networking
Source Code
MSDG
CDG
Source Code (Coordination Layer)
(labeling)
(pruning)
(search for coordination patterns)
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Outline• CoordInspector
• Methodology• Coordination Patterns• Extracting Strategy
• Integration Analysis Strategy
• Integration Analysis - Example
• Conclusion
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Integration Analysis Strategy
• Post-Integration• Analysis of post-integration coordination model• Comparison with pre-integration coordination model
• 4-steps Strategy
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Integration Analysis Strategy
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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
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Integration Analysis Strategy
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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
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Outline• CoordInspector
• Methodology• Coordination Patterns• Extracting Strategy
• Integration Analysis Strategy
• Integration Analysis - Example
• Conclusion
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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
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Integration Analysis - Example
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Problem found: inconsistent User UpdateComponent: Web-PortalPattern: User Update Operation
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Integration Analysis - Example
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Outline• CoordInspector
• Methodology• Coordination Patterns• Extracting Strategy
• Integration Analysis Strategy
• Integration Analysis - Example
• Conclusion
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October 19-20, 2011 EI2N - Enterprise Integration, Interoperability and Networking
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Conclusion
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October 19-20, 2011 EI2N - Enterprise Integration, Interoperability and Networking
Tool-based methodology to extract Coordination Model
and on identifying Coordination Patterns
based on Slicing Techniques
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Conclusion
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October 19-20, 2011 EI2N - Enterprise Integration, Interoperability and Networking
Integrated in a strategy for Software Integration Analysis
and allows for the suggestion of Improvement Alternatives
which provides useful Feedback
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Conclusion
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October 19-20, 2011 EI2N - Enterprise Integration, Interoperability and Networking
In case study
- Unwanted multiple creations of users
Identified and Corrected coordination problems:
- Lack of parallelism leading to delays
- Deadlocks
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Conclusion (Future Work)
• CoordInspector
• Live modification of source code by edition of extracted graphs
• Performance study concerning different integration scenarios
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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