Airline Reservation System

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Airline Reservation System
Vishnu Pendyala

• Wireless Clients and the advent of Open Net
  Environment (Sun One) Software Architecture

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Precursor

• Anywhere, any time access to information is the
  need of the hour.
• The number of wireless devices installed
  worldwide exceeds the number of desktops.
• Mobile access provision will soon be imperative
  for businesses to stay in the market.

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A Scenario

• Sales Representative, Cindy needs to extend her
  meeting with the client who is out-of-town.
• She uses a mobile device to modify her
  reservation, book a hotel room, pay via mobile
  carrier bill, and downloads map.
• Later, from the meeting room, she checks
  competitors strategy, accesses companys ERP
  system, and logs the order in CRM system.

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Enabling TechnologyThe Client Side

• Services are downloaded from wireless Application
  Servers, on demand and locally executed.
• Java Application Manager (JAM) first downloads
  the XML descriptor of service JAR file to decide
  further.
• JAM manages security, based on origination-based
  operator trust model for access to SIM card.
• Data in XML for transformation to format suitable
  for mobile device.

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Enabling TechnologyThe Server Side

• EJB components cater to the service logic, make
  calls to AAA server.
• EJBs in AAA server use JNDI to access subscriber
  directory.
• Container provides communication protocol,
  directory access, security.
• Container scales to meet different needs, but
  application programming model is same to
  developers.
• Programmable network allows new services to be
  added without changing the physical plumbing.

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Sun ONE Architecture

• Web Services based architecture for
  interoperable, pervasive computing.
• A Web service represents a unit of functionality
  accessible over the web.
• It exposes XML interface, can be located through
  a registry, communicates using XML, and supports
  loosely-coupled connections.
• Based on XML Java Technologies Infrastructure
  Standards (HTTP,SSL)

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Web Services Developer Model

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Technologies supporting Web Services

• UDDI 130 companies developing a universal, UDDI
  Business Registry - a web-based directory.
• WSDL an XML framework for describing web
  services.
• SOAP provides XML messaging protocol and
  supports RPC programming model.
• ebXML B2B XML framework enabling business
  collaboration thru sharing of Web Services.

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References

• Enabling the wireless net effect,
  http//www.sun.com/sp/supplements/wireless_whitepa
  per.pdf
• Suntm Open Net Environment Technical White
  Paper http//www.sun.com/software/sunone/wp-arch/
  
• eMobile A Sample End-to-End Application - Part
  2, http//java.sun.com/j2ee/white/eMobilePartII.pd
  f