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  1. Realizing Vision 2020: A Proposal Aditya P. Mathur Professor, Associate Head, and Director Department of Computer Sciences and Software Engineering Research Center Purdue University, West Lafayette, IN, USA Pundi Narasimham President STS Worldwide, Atlanta, USA Tuesday August 8, 2000 Last updated: July 13, 2000

  2. Vision 2020 • “The sixth is the challenge of establishing a scientific and progressive society, a society that is innovative and forward-looking, one that is not only a consumer of technology but also a contributor to the scientific and technological civilization of the future.“: ….His Excellency YAB Dato' Seri Dr Mahathir Mohamad. Realizing Vision 2020: A Proposal

  3. Scientific and progressive society • Purdue-STS Contribution: • Establishment of procedures to transform current mode of business practices of the Government of Malaysia into digital-mode. • Transformation of key selected governmental procedures into the digital domain. Realizing Vision 2020: A Proposal

  4. Contributor to the scientific and technological civilization of the future • Purdue-STS Contribution: • Development of the most advanced tools for test and management of Internet Services. • Research and Prototype development at Purdue. • Productization and commercialization by STS Malaysia. Realizing Vision 2020: A Proposal

  5. The Digital Government Project [1] • Long term goal: • Execute all essential tasks in a secure digital domain. • Provide the citizens of Malaysia the opportunity to complete all transactions with the government in a timely manner and in a secure digital domain. Realizing Vision 2020: A Proposal

  6. The Digital Government Project [2] • Collaborators: • Department of Computer Sciences at Purdue University. • STS Offshore Services (M) SDN BHD Malaysia. • Selected University in Malaysia. • Senior Personnel: • Professor Aditya Mathur, Purdue University • Professor Michael Stohl, Dean International Programs, Purdue University. • Pundi Narasimham, President, STS. Realizing Vision 2020: A Proposal

  7. The Digital Government Project [3] • Project Phases: • Phase I: Feasibility study and project planning. Purdue/STS. January-July 2001. • Phase II: Prototyping: Purdue. September-March 2002. • Phase III: Digitization I: Purdue/STS. June 2002-May 2003. • Phase IV: Digitization II: STS: Period to be determined. Realizing Vision 2020: A Proposal

  8. The Test Tools Project [1] • Phase I: Transfer Internet Services Test technology developed at Purdue to STS. • Phase II: STS productizes the technology in collaboration with faculty from a University in Malaysia. • Phase III: STS commercializes the product as a product from Malaysia. • Purdue continues research in advanced test tools in collaboration with a University in Malaysia. Realizing Vision 2020: A Proposal

  9. The Test Tools Project [2] • Timeline: • Phase I: December 2000. • Phase II: January-July 2001. • Phase III: August-December 2001. Realizing Vision 2020: A Proposal

  10. The Test Tools Project [3] • Development of the test tools will continue once the first version has been marketed and has been adopted by customers. Realizing Vision 2020: A Proposal

  11. The Test Tools Project [4] • What to test and manage? • Internet services: e-commerce, web-sites, CORBA applications, XML applications, Java applications. • What will the tool(s) allow a tester to do? • Visual Test capture and replay. • Visual Test assessment and enhancement. • Dynamic testing (future). • Monitoring and control of CORBA, XML, and Jini applications. • Performance testing. Realizing Vision 2020: A Proposal

  12. The Test Tools Project [5] • Uniqueness of the Purdue technology: • Integrated test and management. • Support for test assessment via Interface Mutation. • Support for heterogeneous environment. • Multiple platforms. • Multiple software technologies (e.g. CORBA and XML) • Strength of Purdue: • World leader in research in software testing. Research group at Purdue has published over 100 research papers in world class journals and conference proceedings since 1987. Eight Ph.D. theses have been produced in this area. Realizing Vision 2020: A Proposal

  13. The Test Tools Project [6] • Details of the testing techniques and the tool follow. Realizing Vision 2020: A Proposal

  14. Client/Server Client/Server Stub/Skeleton Stub/Skeleton Component ORB: Object Request Broker Structure of an Internet Service Component Component Request/data Request/data ORB ORB Communication . Realizing Vision 2020: A Proposal

  15. Interface Testing 100% Method Coverage # methods executed # methods defined Methods: m1, m2, …,mk 100% Exception Coverage # exceptions raised # exceptions defined Exceptions: e1, e2, …,ek 100% iMutation Score # distinguished mutants total # imutants - #equivalent imutants Interface Component Realizing Vision 2020: A Proposal

  16. Test Suite T contains Request-A. Request-A Client Server Interface Response-A Request-A Mutated Interface Client Server Response-B What is Interface Mutation ? Realizing Vision 2020: A Proposal

  17. Observations [1] • Interface mutation leads to fewer tests that reveal almost as many errors as revealed by statement and decision coverage. • Interface mutation is a scalable alternative to using code coverage. Realizing Vision 2020: A Proposal

  18. 3 1 4 5 2 Client Request Server Client Observations [2] • Reveals • programming errors in components. • errors in the use of component interfaces • Reveals certain types of deadlocks Server callback Realizing Vision 2020: A Proposal

  19. Testing for fault tolerance • Problem: • Often error recovery code is not executed by test inputs • How do we know if the fault recovery code adequately meets the requirements? • Solution: • Simulate the occurrence of faults by injecting them • Fault injection testing at the interface • Increases coverage of fault recovery code • Reveals inadequacies in fault recovery code Realizing Vision 2020: A Proposal

  20. Load Testing Effect of: Avg. Load On: Avg. Latency C1 network Clients Server C2 Realizing Vision 2020: A Proposal

  21. Dynamic Testing • Question: • How to test an Internet Service while it is in use? • Answer: Use the dynamic testing procedure. • What is the dynamic testing procedure? Realizing Vision 2020: A Proposal

  22. Client Client Ra 1 2 3 Client Ra Isolated server Faulty Server group Faulty server Test Client Dynamic Testing Realizing Vision 2020: A Proposal

  23. Limitations of Dynamic Testing • Test client might generate undesirable actions: • Persistent data modification. • Irreversible actions. • Application limited to: • Closed and well understood domains. • Simulated or isolated service environments. Realizing Vision 2020: A Proposal

  24. Organization of the Service Domain • Why organize ? • Efficient and scalable management • Personalized management • Assignment of individual responsibilities Realizing Vision 2020: A Proposal

  25. Dimensions of Organization Component Types Geographical regions Client categories Realizing Vision 2020: A Proposal

  26. MC specification XML Parser WABASH GUI Object state information Events Events Application Object control Commands (allow/deny) Managing XML Applications XML specification WABASH MC Module Subscribe Publish Realizing Vision 2020: A Proposal

  27. Architecture of Wabash 3.0 Realizing Vision 2020: A Proposal

  28. Ongoing Research [1] • API development. • Non-intrusive procedures for dynamic testing. • Generalized event-control model and its implementation. • Implementation of the unified architecture to assist with the management of JMX, JINI, CORBA objects, and XML applications. • Light-version of Wabash for SmartHome management. Realizing Vision 2020: A Proposal

  29. Ongoing Research [2] • Automatic generation of test inputs. • Test capture and replay. • Dynamic data collection and analysis. Realizing Vision 2020: A Proposal

  30. The Wabash Project: History • Progress: August 1998: • Wabash project launched. August 1999 • TDS 1.1 available to SERC affiliates. August 2000 • Wabash 2.0 available to SERC affiliates. • Experiments to assess goodness of proposed interface testing criteria completed. December 2000 • Uniform interface for Jini/JMX/CORBA objects and XML applications. Realizing Vision 2020: A Proposal

  31. Zonal Manager MC AR db LLI Host 1 L L CS Response LOG Architecture of Wabash 2.0 [1] GUI requests data from the Zonal Manager Wabash GUI Zonal Manager returns data collected from LL to GUI LL returns data to Zonal Manager Zonal Manager requests data from corresponding LL LL determines whether request can be passed or not Client sends a request to a managed object Request C If the request is allowed, LL forwards it to the CORBA Server after time-stamping it If the request is not allowed, LL throws exception and does not forward request to the CORBA Server LL gets the response from the CORBA Server LL stores information about the request, records it in a log, sends the response back to client Realizing Vision 2020: A Proposal