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Booking Service on Internet to Demonstrate Distributed Transaction on CORBA

Booking Service on Internet to Demonstrate Distributed Transaction on CORBA. Presented by Kam Shu Kai, Andy Student No.: 97082720 Supervisor : Professor Michael R. Lyu. Content. Motivation Distributed System CORBA Implementation: Integrated Transaction Service System Conclusion.

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Booking Service on Internet to Demonstrate Distributed Transaction on CORBA

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  1. Booking Service on Internet to Demonstrate Distributed Transaction on CORBA Presented by Kam Shu Kai, Andy Student No.: 97082720 Supervisor : Professor Michael R. Lyu

  2. Content • Motivation • Distributed System • CORBA • Implementation: Integrated Transaction Service System • Conclusion

  3. Motivation • Network technology • Client/Server Distributed system VS Centralized system • OMG/ORB • Integrated Transaction Service System

  4. Distributed System(1) • Personal computers and Workstations • Local Area Networks • Database server • WWW

  5. Distributed System(2) • Key Characteristics • Resource Sharing • Openness • Concurrency • Scalability • fault tolerance • transparency

  6. Distributed System(3) • Basic Design Issues • Naming • Communication • Workload allocation • Consistency maintenance

  7. CORBA (1) • Object Management Architecture

  8. CORBA (2) • CORBA ORB • Static and dynamic method invocation • High-level language bindings • Self-describing system • Local/remote transparency • Built-in security and transactions

  9. CORBA (3) • Client side • Client IDL stubs • Dynamic Invocation Interface (DII) • Interface Repository APIs • ORB Interface

  10. CORBA (4) • Server side • Server IDL Skeleton • Dynamic Skeleton Interface (DSI) • Object Adapter • Interface Repository • ORB Interface

  11. Demonstration (1) • System Requirement (1) • Transaction on Internet - Web browser • Venue Booking and Service Adding • Seat Reservation • Multiple users • Quick response time

  12. Demonstration (2) • System Requirement (2) • View the updated/inserted record • Delete record • Notification/Error messages • Friendly GUI • Callback

  13. Demonstration (3)

  14. Demonstration (4)

  15. Implementation (1)

  16. Implementation (2) • Interface Definition Language • Module : • Client • Interface : ClientControl • InternetTran • Interface : BookDispenser, Book

  17. Implementation (3) • Database • Relational database : Oracle8 Server, Release 8.0.5.0.0 • Tables : • USERS, VENUE, ZONE • SERVICE, SESSIONS, FEE, TRANSACTIONS • Programming tools • VisiBroker for Java 3.4

  18. Implementation (4) • Communication • osagent • IIOP • Gatekeeper

  19. Objects Interaction

  20. Testing • Accuracy • functions • Performance • response time • Test strategy • Server on Solar • Client on Windows NT and Unix Workstation • 12 concurrent users

  21. Results • Concurrent update • High throughput • Enforce Business rules • Response time: • initial loading of Opening Screen • display of Seat Reservation Screen • others

  22. Discussion (1) • Accuracy and Performance • number of concurrent users ? 12 • efficiency : • No attribute in Interfaces • transfer in single a operation

  23. Discussion (2) • Design Strategy • prestart server objects • multi-server on different machines • load balancing • flexibility and reliability • thin client • UI • portability

  24. Discussion (3) • Enhancement • multiple databases on different servers • replication • fault tolerance • Object-Oriented Database • object oriented design approach • reduce the locking granularity

  25. Discussion (4) • Reusability • Scalability • Maintainability • Interoperability • Ease of use

  26. Conclusion • The best middleware: • independence of hardware platform • free choice of operation system • neutrality in programming language • openness and industrial standard • Drawbacks: • complexity • lack of visual development tools

  27. Q & A You are welcome!

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