LYU9901 TravelNet - PowerPoint PPT Presentation

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LYU9901 TravelNet

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Building of an online travel agency: TravelNet. The use of distributed components by CORBA ... Features (Online Shop) Selling of Travel Accessories e.g Luggage, ... – PowerPoint PPT presentation

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Title: LYU9901 TravelNet


1
LYU9901 TravelNet
  • Final Presentation
  • Supervisor Prof. Michael R. Lyu
  • Members Ho Chi Ho Malcolm
  • Lau Chi Ho Arthur
  • On 25-04-2000

2
Outline
  • Project Objectives
  • Features
  • Improvement in Design
  • The use of Java Sever Pages(JSP)
  • Distributed Components in CORBA
  • Sophisticated Payment Methods
  • Conclusion

3
Project Objectives
  • Exploring elements of e-commerce applications
  • Building of an online travel agency TravelNet
  • The use of distributed components by CORBA
  • The integration of sophisticated payment methods

4
Features (Membership)
  • Require users to register first before using the
    service provided
  • Login the system with a username and password
  • Allow the change of personal profile

5
Features (Online Shop)
  • Selling of Travel Accessories e.g Luggage, Maps,
    etc
  • A shop basket to store the items to purchase
  • Checkout of the shop basket

6
Features (Travel Guide)
  • Basic description on different cities
  • Help users to plan for their trips

7
Features (Flight Search)
  • Allow users to search flights from some basic
    information
  • Search mode one-way and round-trip
  • Search result is sorted by time
  • Allow users to add suitable item in their
    itinerary

8
Features (Itinerary)
  • Keep flight items that are going to be reserved
  • Allow users to add items from search result or
    manually
  • Allow users to remove unwanted items
  • Booking of flights by itinerary

9
Features (Hotel Information)
  • Basic information on selected hotels
  • Help users to choose hotels in their trips

10
Features (Payment)
  • Support of credit card payment and smart card
    (Mondex) payment
  • For Mondex, users should equip with a reader
  • Details are discussed in the later part

11
Implementation Improvements
  • Java Server Pages
  • CORBA components integration
  • Airline Services Components
  • Shop Stock management Components (will not be
    covered)
  • Payment Systems integration
  • Credit Card Payment
  • Mondex Payment

12
Introduction to JSP
  • Mixing the "static" content of HTML files with
    "directives" for accessing or generating dynamic
    content.
  • Java Server Pages (JSP) provide server-side
    scripting support for generating web pages with
    combined static and dynamic content.
  • Making use of JSP for separating
  • Layout design (in HTML)
  • Processes (in Java)

13
JSP features
  • Combines the worlds of HTML and Java Servlet
    programming
  • Similar to HTML pages with new tags to control
    the generation of dynamic content
  • Client access from an HTTP server
  • Pre-compilation of JSP to Servlet which is
    responsible for generating dynamic pages
  • Reside in application server memory (pre-load OR
    1st access)

14
  • Request from browser to JSP of HTTP server
  • Servlet request the Bean
  • Bean request information from back-ends
  • JSP response requested information to browser

15
Reason of Using JSP
  • Separate layout design from processing module
    design
  • Share the same advantages as Java Servlets have
  • No need for installing new software component for
    using JSP

16
Distributed Components
  • Anticipate the need of distributed components for
    better system management
  • By CORBA technology

17
Introduction to CORBA
  • Standard of building distributed application
  • Allow bindings of different languages through IDL
  • Interaction between client and server objects by
    ORB
  • Facilitate location transparency, access
    transparency and better server-side scaling
    abilities

18
URL Naming Service
  • Server objects need to provide a interoperable
    object reference (IOR) for client objects to
    locate its existence
  • Using URL Naming Service, server object associate
    its reference through URL
  • A file contains the stringified server object
  • Client get the file through this URL

19
CORBA in TravelNet
  • Integration in two parts Airline Service and
    Stock Management
  • Airline Service mainly for flight query and
    reservation
  • Airline Manager as client to connect to the
    remote Airline Server
  • each Airline Manager binds with one specific
    Airline Server

20
CORBA in TravelNet(2)
  • The interface makes everything abstract
  • No difference in invoking methods from the view
    of TravelNets component which calls for the
    airline service
  • Stock Management Access and update remote shop
    stock inventory

21
Performance
  • Comparison between distributed version in CORBA
    and non-distributed one
  • Two experiments are carried out for evaluation

22
Performance(2)
  • Experiment 1 One-way flight search

23
Performance(3)
  • Experiment 2 Round-Trip flight reservation

24
Performance(4)
  • Experiment 1 requires calling 10 or more CORBA
    objects while Experiment 2 only need one.
  • Each CORBA object pose a 0.5 sec overhead
  • Overhead is accumulative
  • Conclusion CORBA is negative to performance
  • If using parallel processing, can reduce the
    effect of the overhead
  • Still beneficial to design for the availability

25
Payment Systems Integration
  • Unavoidable part of any E-Commerce System
  • Different Type of products/services favor
    different types of payment
  • TravelNet Support two types of payment
  • Credit Card
  • Mondex Card

26
Credit Card Payment System
  • The Most Common way for internet shopping
  • TravelNet is not possible to connect to real
    banking system.
  • A system developed by a post-grad student (Steve
    K.L. Chong) in CSE department.
  • The System simulated the major steps in a secured
    Credit Payment

27
Communication Architecture (1)
I. Customer Card information is sent on SSL to
TravelNet. Information also contain products
customers bought and amount to pay.
28
Communication Architecture (2)
II. Merchant Encrypt the Information with Payment
Gateways Public Key and request a debit on the
specific card from Payment Gateway
29
Communication Architecture (3)
  • Internal communication behind the Payment
    gateway. Payment request will be sent and a
    payment result will sent back for this payment

30
Communication Architecture (4)
III. The Payment result will be return back to
TravelNet. Again its encrypted but by
TravelNets Public Key.
31
Communication Architecture (5)
IV. TravelNet verify the payment. And response to
the client Web Browser. This traffic need not be
encrypted.
32
Payment Performance(1)
Fig 2.Performance on Single-Threaded Model
Fig1. Performance on Multi-Threaded Model
  • The performance of multi-threaded model degrade
    More Rapidly than that of single-threaded model
    (to number of concurrent users)
  • Mainly due to Tasking switching Database
    conflict locking.

33
Payment Performance(2)
  • Over 80 of the processing time of a payment is
    spent on Payment Gateway side
  • Single-Threaded model is the default mode for
    Credit Card payment for TravelNet
  • First come first serve
  • Reduce over head

34
Micro-Payment Mondex
  • Store value smart-card becomes more popular
    because they are more convenient and secure.
  • Mondex is one of the most common one in the
    market
  • There is a Mondex project in CSE so we have a
    chance to make use of this technology

35
Mondex Equipments
36
Communication Architecture(1)
1. Client browse TravelNet and select
product/services 2. Client request a Mondex
Payment
37
Communication Architecture(2)
Payment Server
4
TravelNet Web Server
1
2
3
6
5
Consumer Web Browser
3. Server will sign a Payment request for the
customer. The payment requests and other
merchant information will be sent to
customer as a client plugin programs parameters
38
Communication Architecture(3)
Payment Server
4
TravelNet Web Server
1
2
3
6
5
Consumer Web Browser
4. Customer call the plugin-program and connect
to Mondex payment server to start a
payment. Payment result will be returned to
plugin-program after the Payment process.
39
Communication Architecture(4)
Payment Server
4
TravelNet Web Server
1
2
3
6
5
Consumer Web Browser
5. The payment result will be passed from client
plugin-program back to merchant Server. The
merchant will verify the payment result. If
it can be verify successfully, post-payment
process will be done.
40
Communication Architecture(5)
Payment Server
4
TravelNet Web Server
1
2
3
6
5
Consumer Web Browser
6. TravelNet will send the acknowledgement page
to customers Web server together with a payment
transaction ID.
41
Mondex Advantages
  • Convenient usage
  • More secure than Credit Card Payment
  • Suitable for micro-payment
  • Limited the possible monetary loss

42
Program Listing(1)
43
Program Listing(2)
44
Program Listing(3)
Total Number of lines 5310 Total Number of
Characters 181881
45
Conclusion
  • A complete system of E-commerce application
  • New features provided to the basic system
  • Integrated with Distributed Components
  • Support different types of payment methods

46
  • End of Presentation
  • Thank You!
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