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Component-Based Software Engineering: Retrieval and Adaptation Techniques

Explore the use of formal specifications for component retrieval and adaptation in software development cost-saving strategies. Learn about recent efforts, challenges, and aims of the project to develop new library components and apply new templates to case studies.

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Component-Based Software Engineering: Retrieval and Adaptation Techniques

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  1. AN APPLICATION SPECIFIC TECHNIQUE FOR RETRIEVAL AND ADAPTATION OF TRUSTED COMPONENTS Benny Thomas Master of Computer Science Supervised by Dr. David Hemer

  2. SOFTWARE DEVELOPMENT COSTS!! From AGARD Advisory Report 292:- • Concept Definition 5% • System Design 12% • Software Requirements 14% • Software Design 15% • Coding 10% • Software Unit Test 12% • Integration Test 7% • System Test 10% • Documentation 15%

  3. SOFTWARE DEVELOPMENT COSTS!! Continued… From NASA Manager’s Handbook for Software Development:- • Requirement Analysis 6% • Preliminary Design 8% • Detailed Design 16% • Implementation 45% • System Testing 20% • Acceptance Testing 5%

  4. COMPONENT BASED SOFTWARE ENGINEERING (CBSE) TO THE RESCUE! • 40% of costs are directed towards the implementation and testing phases • CBSE saves time and money by advocating the reuse of software • BUT effort of using components must be less than effort of developing from scratch • Technical challenges include • Locating components • Adapting components to suit the requirements of the specification

  5. HOW DOES CBSE WORK? • Previously, traditional keyword-based retrieval strategies were used • Ambiguous • Imprecise • More recently formal specifications used to define the components and their interfaces • Retrieval done using theorem provers and unification algorithms • This itself is not enough. Component adaptation needs to be addressed too.

  6. RECENT EFFORTS • Parameterized templates used to define adaptation strategies • Specification matching introduced to semi-automate component retrieval and adaptation • BUT still early days • Need more primitive templates • Need more gluing templates • Need to test ideas on bigger examples

  7. AIMS OF THE PROJECT • Develop new library components • Primitive components • Gluing components • Apply new templates to case studies

  8. LIBRARY POPULATION • Generally populating the library requires human presence • Main focus will be on modifying existing templates to accommodate other types • REVERSE ENGINEERING • Systematic breakdown of programs • Primitive and essential components • Helps the adaptation process too

  9. CASE STUDIES • Work on 2 or 3 non-trivial examples - Develop from scratch - Reverse Engineer implementation - Represent as library templates - Redevelop using library templates • Develop application specific search tactics based on existing ones • Semi-automate process using developed search tactics

  10. QUESTIONS???

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